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Aespire 7900 Anesthesia Machine Technical Reference Manual

1. 0 cece eects 10 9 10 6 Rear panel components ccc cece eee eee eee enna 10 10 10 7 Tabletop components siie se iaa AE ai daraa naa Ed a Ea II 10 11 10 8 Right side Components essssssssssrrsrrurrerrnrrrnrarrrrrrrrrnnrn 10 12 10 9 External components lower assembly seseee nnn 10 13 10 10 Drawers ee EI te sumet eme E ERA ron er Rr RE LRQ RU E Ee 10 14 10 1 T AG POWeF COIS e moros pce xxi UP RE NIE NEAR RR 10 15 10 12 AC Inlet Outlet Components cece eee eee III 10 16 10 13 Pipeline inletfittings 0 0 cnet ene 10 18 10 14 Cylinder Gas Supplies sssesessseeeen ene naes 10 19 10 14 1 Cylinderinletfittings eee eee eee 10 20 10 15 Vaporizer manifold 0 c cece cee een III 10 21 10 16 Flowmeter components 0 0 c cece cette III 10 22 10 16 1 Flowtube parts me omien cece cece net e eee eens 10 24 10 16 2 Secondary regulator components 00 c cece eee eee eee 10 26 10 17 ABS to machine Interface Components 0 00 c cece eee ene 10 28 10 17 1 Flush Valve and ACGO Selector Switch 0 eee eee 10 29 10 18 Breathing system interface 0 cece eect eee 10 30 10 19 Breathing Systemi sene tocco tracce rnt ath ave diate at cae 10 31 POA OA RTI PEE 10 31 10 19 2 Bag Vent Switch iz eec RR Errare ae rp T 10 32 10 19 3 Absorber canisters dicen certes deser eo yx rues enter ca tes 10 33 10 19 4 Flow Sensor Module
2. AB 82 028 a O D S APL disc and seat 6 APL flow 7 To scavenging Figure 2 6 Flow through the APL Valve 02 05 1009 0541 000 2 3 3 Mechanical ventilation Mechanical inspiration Figure 2 7 V Bag Vent switch to Vent P Pilot pressure D Drive gas FG Fresh Gas AP Airway Pressure 1 Flow to absorber 2 Flow from absorber 3 Inspiratory flow Figure 2 7 Mechanical inspiration 1009 0541 000 02 05 2 Theory of Operation The Bag Vent switch closes the manual path V Pilot pressure P closes the exhalation valve Drive gas D pushes down on the bellows Gas flows from the bellows 1 through the absorber 2 and through a unidirectional valve inspiratory check valve to the patient 3 During inspiration fresh gas flows into the inspiratory limb upstream of the inspiratory check valve nee es RO Tas A SA 3 Ne aS A a S 3 AB 82 029 2 15 Aespire 7900 Mechanical expiration Figure 2 8 AP Airway Pressure D Drive gas FG Fresh Gas SGR Sample Gas Return 4 Expiratory flow 5 Flow to bellows 6 To scavenging Figure 2 8 Flow through the APL Valve 2 16 Drive gas flow stops and the exhalation valve opens Exhaled gas flows from the patient 4 through a unidirectional valve expiratory check valve and into the bellows 5 Residual drive gas D flows out of the bellows to the scavenging system 6
3. 12V BATTERY THERMAL AUTO gt TASK LIGHTS LDO TYPICALLY 11 718V VHEL DISPLAY LDO RESETABLE FUSE MOSFET SWITCHES ACTO DC POWER SUPPLY 85 264 VAC VCHGR 16 0 TYPICAL VMAIN 12 5V TYPICAL Fuses Line Filter Isolation Transformer AC INLET POWER CORD SELECT VMAIN OR VBAT AS OUTPUTTO VBUS DIODE OR VMAIN VCHGR VBAT VBUZZER OUTPUT TO VDD FAIL BUZZER VSWITCH ON STANDBY SWITCH CIRCUIT A SIMPLE SWITCHER DUAL OUTPUT SWITCHER POSITIVE OUTPUT NEGATIVE OUTPUT TYPICALLY 11 718V VALVES SUPPLY 5 8V OUTPUT and 10VA VDD DIGITAL OUTPUT LDO 5V 2 5 SIB_12V OUTPUT and 10VA LDO 15V ANALOG SUPPLY LDO 15V ANALOG SUPPLY LDO Rem_On AC_LED Figure 2 18 Ventilator power supply Integrated CPU 2 26 02 05 1009 0541 000 2 6 3 Sealed lead acid battery 1009 0541 000 02 05 2 Theory of Operation Asealed lead acid battery supplies battery backup for the Aespire 7900 Ventilator The Aespire 7900 Ventilator is not a portable unit Batteries for the ventilator are used as back up power in case of a power failure Thus the battery is in a float charge state most of the time Batteries meet the following Capacity to operate unit for 30 minutes Long float charge life e Battery pack is internally fused in line replaceable e Battery terminals and connecting wires ar
4. Note An alternate method is to pressurize the system and use a leak detector or Snoop to check for source of leak Leaking relief valve on vaporizer manifold Remove relief valve Occlude opening Perform leak test If test passes replace valve Leaking flush valve Attach pressure measuring device on CGO Replace valve if device shows increased pressure Leaking system switch Attach pressure measuring device on CGO Replace switch if device shows increased pressure Bellows leak Pop off valve diaphragm not sealing properly Disassemble pop off valve inspect and clean seats reseat reassemble Bellows mounting rim loose Remove rim and pop off valve diaphragm reseat diaphragm snap rim 2 into place Bellows improperly mounted or has a Check that only the last bellows convolute is mounted to hole or tear the rim and that the ring roll is in the groove under the rim Inspect the bellows for damage replace Breathing System Leak Absorber canister not installed properly Install canister properly Soda lime dust on canister seals Clean seals and mating surfaces Breathing System Leak ACGO O0 sense check valve Intermittent Replace N50 flow does not decrease Defective pilot regulator with O flow Check pilot regulator Replace if needed Unit displays low O pressure with pipeline but not with cylinders Low O supply switch Check switch Calibra
5. 9 8 7 Checkout procedure for 05 supply switch The O supply switch is located on the O flowmeter s regulator module 1 2 N Oo oO fF C Remove the upper rear panel Section 9 2 Remove the two mounting screws from the 05 supply switch Adjustment screw 4 mm hex Pull the O supply switch out of the regulator manifold Install the replacement O supply switch Tighten the screws Disconnectthe leads from the old switch and reconnect them to the new switch Adjust the alarm threshold for the new O supply switch as explained in the checkout procedure below Section 9 8 7 Replace the rear panel Perform the checkout procedure Section 3 Remove the upper rear panel Section 9 2 Attach a gauge to the O primary regulator test port On pipeline only machines attach the gauge to a 6 mm 0 port 3 Adjust the O flow control to minimum flow clockwise 4 Install an O cylinder and open the cylinder valve for pipeline only connect O pipeline source 5 Turn the system on 6 Closethe cylinder valve disconnect pipeline from source and watch the test gauge as the O pressure bleeds down slowly Note The No O pressure alarm should occur between descending pressure of 221 193 kPa 32 28 psi If adjustment is required set the adjustment screw so that the No O pressure alarm occurs at 207 7 kPa 30 1 psi Disconnectthe gauge and plug the test p
6. Perform the low pressure leak test Section 3 9 Perform the checkout procedure Section 3 02 05 1009 0541 000 9 Repair Procedures 9 11 Clean or replace ACGO port flapper valve 1009 0541 000 02 05 Remove the tabletop Section 9 3 eT a Remove the ACGO cap mounting e 7h s screws i ey mm Remove the cap ae S Cap Examine the flapper and disk for S obstructions or debris Clean with isopropyl alcohol if necessary retest If leak persists replace the flapper s Remove the flapper from the check valve disk Hub s Clean the new flapper with isopropyl alcohol Apply a drop of isopropyl alcohol to the center hub of the new flapper Before the alcohol evaporates align the center hub of the new flapper with the center hole of the check valve disc Flapper While pressing the flapper against E O ring the disc use you fingernail to help pull the hub through the disc from the other side Lubricate the o ring sparingly with Krytox do not get Krytox on the flapper Insert the flapper assembly into the ACGO outlet with the flapper up Replace the cap 9 33 Aespire 7900 9 12 Reconfigure sample gas return line 9 34 Sample gas return is directed to the scavenging system as a factory default Perform the following to reroute the sample gas back to the breathing system Refer to Tubing on page 11 7 1 2 Remove the plug from
7. w N Oo Oo A Remove the Flow Sensor Module Plug each Flow Sensor as shown above Connect the low pressure leak test device to the open end of the Flow Sensor Block the connector end of the Flow Sensor with your hand Compress and release the bulb until it is empty Ifthe bulb inflates in 30 seconds or less there is a leak in the flow sensor Ifthere are no leaks in the flow sensors go to Test 15 1 25 Aespire 7900 Test15 Testing a flow sensor including the Ventilator Monitoring Assembly and interfacing components Remove Flow Sensors from the Flow Sensor Module Attach the Flow Sensor to the bulkhead connector Plug each Flow Sensor as shown a 0 N e Connect the low pressure leak test device to the open end of the Flow Sensor O1 Compress and release the bulb until it is empty 6 Ifthe bulb inflates in 30 seconds or less there is a leak The leak may be through the connector o rings in the internal tubbing or in the Transducer on the VMB 7 26 02 05 1009 0541 000 1 Troubleshooting 1 3 Ventilator Troubleshooting instructions Important A WARNING A WARNING 1009 0541 000 02 05 For ventilator problems that do not generate any error or alarm messages even though the ventilator may not be functioning correctly e Refer to section 7 6 Mechanical electrical troubleshooting guide For ventilator problems that result in an Alarm or Error message s Refer
8. 9 62 Refer to Section 6 for Vent Engine components that are to be serviced under regular maintenance Most of the components on the Vent Engine can be replace by removing the mounting screws and remounting the replacement part in place Inspect the two o rings that seal it to the manifold Replace as necessary To replace GIV shuttle valve components refer to Section 9 24 3 Install the filter with the smooth side facing up Inspect the o ring Replace as necessary Inspect the two o rings that seal it to the manifold Replace as necessary Perform the Drive Gas Regulator calibration in Section 4 3 18 Inspect the two o rings that seal it to the manifold Replace as necessary Lubricate o rings sparingly with Krytox Inspect the o ring that seal itto the manifold Replace as necessary Clean the seat on the manifold and the seal on Drive Gas Check Valve with isopropyl alcohol Note orientation of the flow valve Inspect the two o rings that seal itto the manifold Replace as necessary Perform the Inspiratory Flow Valve calibration in Section 4 3 22 Inspect the two o rings reservoirto manifold reservoir to screw head Replace as necessary Inspect seal between solenoid and GIV body Replace as necessary included with solenoid 02 05 1009 0541 000 9 Repair Procedures 9 24 3 Replacing Lubricate items marked with and asterisk sparingly with Krytox GIV components A O
9. Servicing of this product in accordance with this service manual should never be undertaken in the absence of proper tools test equipment and the most recent revision to this service manual which is clearly and thoroughly understood Technical Competence The procedures described in this service manual should be performed by trained and authorized personnel only Maintenance should only be undertaken by competent individuals who have a general knowledge of and experience with devices of this nature No repairs should ever be undertaken or attempted by anyone not having such qualifications Datex Ohmeda strongly recommends using only genuine replacement parts manufactured or sold by Datex Ohmeda for all repair parts replacements Read completely through each step in every procedure before starting the procedure any exceptions may result in a failure to properly and safely complete the attempted procedure 02 05 1009 0541 000 1009 0541 000 02 05 Table of Contents Important sss ee OO aa ek Pee a ead ii Technical Competence i i sess secet cee edd da duos eb Ra E kde wee ede ii 1 Introduction 1 1 Whatthis manual includes sssssssesee eee eens 1 2 1 2 Standard service procedures 0 0 0 e eect eee eee eee 1 2 1 2 1 User s Reference Manuals 0 cece cece eet e eae 1 2 1 2 2 Software VErSIONS is sik iene Gee Yu bk rS RO ka Wey avant lel ties 1 2 1 2 3 Ventilator tests ieai esce eacee pigra wma
10. e Ifthe resistance is approximately 1 75 ohms the drive circuit is bad replace the CPU board Section 9 23 1 and test the flow valve again If the flow valve test fails again replace the flow valve Section 9 24 2 1009 0541 000 02 05 4 17 Aespire 7900 4 3 9 Test Drive Pressure Limit Switch The software tests the pressure limit switch to make sure that it trips at the correct manifold over pressure The software opens the flow valve to a value where pressure continues to increase It then waits for the DPL Drive Pressure Limit switch to trip The pressure at which the DPL switch tripped is indicated This value is the manifold pressure measured upstream of the drive gas check valve the typical reading is 112 cm H20 not the actual pressure at the switch If the DPL switch never trips within 15 seconds the test fails If the DPL switch does nottrip at a pressure within the correct tolerance the test fails Test Drive Pressure Limit Switch Directions for testing 1 Set Bag Vent switch to Vent 2 Set the fresh gas flow to 10 L min 3 Occlude the patient circuit at the Y connector 4 Select Start Test to start the test Go to Service Modes Menu Figure 4 18 Test Drive Pressure Limit Switch menu Drive Pressure Limit Switch FAIL 4 18 instructions Go to the Discrete 1 0 signal menu and check the DPL Drive Pressure Limit Switch status Off Remove the rear subfloor Connect a pressure test
11. 02 05 1009 0541 000 4 3 21 Pressure Figure 4 32 Pressure Sensitivity menu Sensitivity Note Pressure sensitivity FAIL 1009 0541 000 02 05 instructions A Caution 4 Self Tests and Service Mode The software prompts the user to perform the procedure to calibrate the pressure sensitivity This calibration is not an automated calibration It prompts the userto follow a set of procedural steps to perform the calibration This calibration calculates the pressure sensitivity at four different pressures It uses these four different pressure points along with the inspiratory flow and expiratory flow zero offsets to find the pressure sensitivity If the calculations for the pressure sensitivity are not within the correct tolerance the calibration fails If the calibration passed the four pressure sensitivity points are stored in the EEPROM This pressure transducer calibration must be performed ifthe SIB assembly or CPU board is replaced Pressure Sensitivity Directions for Pressure Sensitivity Calibration 1 Perform the Calibrate Flaw Sensors calibration 2 Occlude the bag port 3 Connect short patient tubing from insp flow port to exp flaw port 4 Set Bag ent switch to Bag position 5 Select Start Pressure Sensitivity Cal B Adjust the APL and fresh gas flow to stable pressures of 10 20 40 and 60 cm H20 7 After each setting wait 5 seconds and select Save Value to save the value Ainvay Press
12. 1 9 Aespire 7900 Leak in both Bag and Vent Mode Common Areas Flow Sensor Module Circuit Module Soda Lime Canister Negative Pressure Relief Perform Test 9 Testing the Flow Sensor Module Circuit Module and Soda Lime Canister Perform Test 10 ien fhe Testing the Circuit Module and Canister a ue eure Pass Fail Fail Pass Perform Test 14 and 15 Perform Test 11 Replace the Negative Testing the Flow Testing the Circuit Pressure Relief per de uec ee Sensors Bulkhead Module Bag Vent Cartridge g Disk ard O Bin connectors and tubing O Rings g AB 74 045 Pass Fail Perform Test 12 Testing the Inspiratory side of the Circuit Module and Canister Inspect Canister for leaks Pass Fail Inspect Expiratory Inspect Inspiratory side of Circuit Module side of Circuit Module Repeat Test 11 Repeat Test 11 Flowchart 4 02 05 1009 0541 000 1 Troubleshooting Leak in Flow Sensor Module or Circuit Module Perform Tests 14 and 15 Testing the Flow Sensors using the low pressure leak test device oo Check Replace the seals bulkheadiconnector on the Circuit Module and O Rings the O Ring on the O cell AB 74 048 Swap Module s Perform Breathing with another machine System Leak Test Pass Done Repair or replace Module Section 7 2 1 Flowchart 5 1009 0541 000 02 05 Aespire 7900 7 2 3 Leak Isolation Tests 7 12 Test 1 Test 2 Test 3 Test 4 Tes
13. 5 Remove the regulator assembly from the front panel 6 Transfer the tubing to the new regulator s Attach the vacuum source tube white fitting to the lower connector E e Attach the suction tube black fitting to the upper connector F T Guide the tubes into the front panel opening 8 While holding the regulator assembly against the front panel attach the retaining bracket to the regulator Tighten the screws to secure the regulator assembly 9 Ifapplicable attach the control port tube to the pilot valve adapter C 10 Attach the vacuum and suction fitting to the rear panel manifold 11 Replace the rear panel 12 Perform the checkout procedure Section 3 9 42 02 05 1009 0541 000 9 Repair Procedures 9 17 Replace ABS breathing system components 9 17 1 Replace 1 Remove the ABS breathing system Bag Vent switch 2 From the underside remove the bellows base manifold A and fully loosen the two assembly captive screws B at the bag port side of the APL BTV manifold 3 From the topside rotate the Bag Vent switch cartridge counterclockwise until the Bag vent switch outlet port C clears the bellows housing 4 Lift out the Bag Vent switch cartridge from the housing 5 Replace the Bag Vent switch cartridge in reverse order 6 Reinstall the ABS breathing system 7 Perform the checkout procedure Section 3 1009 0541 000 02 05 9 43 Aespire 7900 9 17 2 Replace To replace the latch assembly
14. Disconnect the test device and plug the test port pull on the plug to ensure it is locked in the fitting Replace the bellows assembly Replace the rear panel s Perform the checkout procedure Section 3 For all gases not used to supply drive gas to the ventilator Under low flow conditions the output pressure of a properly adjusted functioning regulator should fall within specifications listed in step 4 Under high flow conditions the output pressure should not drop below the specifications in step 7 1 If the cylinder supply being tested is N20 connect a source of O and set the O flow control to the minimum stop pilot pressure for secondary regulator Slowly open the cylinder valve forthe regulator being tested Setthe system switch to On 02 05 1009 0541 000 1009 0541 000 02 05 4 8 9 10 11 12 13 5 Calibration Low Flow Test Set the flow ofthe gas being tested to 0 05 L min or minimum flow for 05 When checking a regulator on systems that have a single flowtube open the needle valve 1 8 turn from the minimum stop to achieve a flow close to 0 05 L min e Close the cylinder valve and allow the pressure to decay to 2068 kPa 300 psi as indicated on the cylinder gauge upperlimit ofthe red band The flow may be temporarily increased to facilitate the decay Atthe time that the cylinder pressure reaches 2068 kPa 300 psi set the system switch to Standby e Within one mi
15. H xN x i j jg p 1009 0541 000 02 05 Remove the retaining ring A and the GIV cap B Use pneumatic pressure to remove the shuttle Cover the shuttle with a cloth and briefly apply pressure connect the drive gas hose or use pipeline pressure through the drive gas inlet Remove the upper o ring C and the lower o rings D Install the lower o ring D Lubricate the shuttle E at the three areas shown the circumference of the shuttle where the upper and lower u cup seals are placed and the body part of the shuttle that slides along the lower o ring 6 Install the lower u cup seal F and the upper u cup seal G on the shuttle T Pressthe shuttle assembly into the GIV manifold 8 9 Install the upper o ring C Install the cap B and the retaining ring A 10 Reassemble in reverse order 9 63 Notes 9 64 02 05 1009 0541 000 In this section 1009 0541 000 02 05 10 Illustrated Parts 10 1 Service tools aneron ye eales oie ew eld ad ere Kem DE alk Bee ate PRA 10 3 10 1 1 SOMWANC osc riu Re Rs Rr etd a cas tgo epi pa trt 10 3 10 1 2 Secondary regulator pilot pressure tool 0 0 cece eee eee eee 10 3 10 1 3 Test DeViCes iles nn re xe D Rh 10 4 10 1 4 Lubricants and Adhesives 0 cc cect eee eee eens 10 4 10 1 5T8st TOOlS 5 E Say a A a Ten ee 10 5 10 2 External components front VieW 2 6 c eee eee I 10 6 10 3 External components fron
16. Set the low Ve alarm Apnea Alarm User Alarm Standby Normal condition after End Case power up or ACGO change from On to Off Monitoring resumes after first breath mechanical or 2 breaths within 30 sec non mechanical Apnea Alarm User Alarm The cardiac bypass Apnea alarms are Off option is selected normally turned off alarm limit menu when this option is selected Aux Gas UserAlarm The outlet selection If persists check Outlet On switch is set to the e ACGO switch auxiliary common gas ESIB outlet cable from ESIB to CPU board Connectthe patient circuit to the auxiliary outlet For mechanical ventilation or manual ventilation with monitoring select the common gas outlet Backup User Alarm SIMV PC PSV mode No spontaneous breath Mode Active entered within set delay time Battery UserAlarm The current in the The system is Replace Charger Fail battery charging circuit operational but may fail battery is too high later depending on what CPU board caused this alarm Battery User Alarm The battery is not fully If persists replace Charging charged If power fails battery the total backup time will be less than 30 veal minutes Leave the system plugged in to charge the battery Battery User Alarm Battery current gt 6 The system continues to If persists replace Current High amps for 10 seconds operate but may fail batte
17. lsssesssssnI 10 34 10 19 5 Breathing Circuit Module 0 cece eects 10 35 10 19 6 Exhalation valve ur cack v need ca eet eee e Res 10 36 10 4977 Bellas conics ae ioe utto EU nece beet ae dls 10 37 10 19 8 BellOWjDase uter mmt rte ERU nata feet ite 10 38 10 19 9 Bag ArMS cvvis sian nep dee fee y a i cages bbe eine REA FERA 10 39 Aespire 7900 10 20 Electrical enclosure lower parts cece eee I 10 40 10 2 1 Display Module sss ee ions ood loi eee aa ad vee Saad Eee nh 10 42 10 21 1 Rear housing parts 02 0 cece 10 42 10 21 2 Front housing parts cece eee eee eee eee eee 10 43 10 22 Vent Engine Housing 6 eect nee 10 44 10 23 Vent Engine cs voee teenie ioe aan ne ERR E ERO GRE D de sata wie ee 10 45 10 23 1 Vent Engine underside 0 cece cece eee eee eee 10 46 10 24 Legris quick release fittings 0 0 0 cece eects 10 47 10 25 Vent Drive and low pressure tubing 0 ccc eect eee eee eee 10 48 10 26 Tubing for use with Legris fittings a a aeaaaee 10 50 1027 Cables and NAMES S S secs socer emen ovt dte ae 10 52 10 28 Anesthetic Gas Scavenging System AGSS 00 eee e eee eee eee 10 54 10 28 UPaSSIVE AGOSS os cuerda aN ae ee da aaa aac t 10 54 10 28 2 Adjustable AGSS i2 tetrad anche Wale etr ee Ped ahaa de 10 56 10 28 3 Active AGSS oliin erg ERERERERUERUHOCRENERE ETE AS 10 58 10 29 Integrated Suction Regulator 0 2 0 cece eee ene een eee eae 10 60 10
18. 3 Lockwasher M6 internal 4 Dovetail RH upright 5 Screw M4x10 self tapping 6 Cover pipeline inlet T Screw M4x8 10 12 Stock Number 1009 3021 000 0144 2131 921 0144 1118 130 1009 3129 000 1009 5534 000 1009 3091 000 1006 3178 000 02 05 1009 0541 000 10 9 External components lower assembly 4 5 1009 0541 000 02 05 Item Oo oa A C N 10 11 12 13 Description Panel access Panel service Screw M4x8 Thumbscrew Ring retaining Cover scavenger reservoir Bracket suction reservoir Screw M4x16 Lockwasher M4 external Clip suction bag hose Screw M5x16 PAN HD Lockwasher M5 external Bumper absorber 10 11 12 10 Illustrated Parts 13 8 9 Stock Number 1009 3059 000 1009 3141 000 1006 3178 000 1406 3304 000 1406 3319 000 1009 3027 000 1009 3107 000 9211 0440 163 9213 0540 003 1407 3321 000 9211 8350 163 0144 1118 220 1009 3105 000 10 13 Aespire 7900 10 10 Drawer 10 14 Item 2 3 4 5 6 5 6 Description Slide drawer Screw M4x8 Nyloc Drawer body Drawer Front lower down arrow Drawer Front upper up arrow Screw M4x12 Stock Number 1009 3084 000 1009 3183 000 1009 3078 000 1009 3032 000 1009 3031 000 1009 3109 000 02 05 1009 0541 000 10 11 AC Power cords 1009 0541 000 02 05 Item a A OU N o pe 3 Pw d DE l gt w 4 2 Description Power Cord Australi
19. 6700 0005 300 148 unmarked Tygon 465 mm 1 2inch 6700 0005 300 149 unmarked 40 mm 8 mm 1001 3063 000 150 unmarked Tygon 180 mm 1 2inch 6700 0005 300 151 PAW low pressure 930 mm 1 4 inch 1605 1001 000 230 MANIFOLD PRESS low pressure 30 mm 1 4 inch 1605 1001 000 Refer to section 10 26 Sample gas return is directed to the scavenging system as a factory default A qualified service representative can reroute the sample gas back to the breathing system refer to Section 9 12 02 05 1009 0541 000 10 Illustrated Parts 1009 0541 000 02 05 Gy g From a n fF 05 Supply t k From 02 Air T Flowhead E 7 i sS N ZA 2 S TN ri AB 74 072 r1 7 02 Air hil fe Venturi Drive Suction 10 49 Aespire 7900 10 26 Tubing for use with Legris fittings 10 50 Except for the Tygon tubing Items 147 and 150 this tubing is a flexible Nylon type tubing for use with quick release fittings Item 106 107 108 109 113 115 116 118 123 219 111 110 112 100 101 102 104 105 103 147
20. ACGO selector valve inlet cross connection if short filling time 05 Supply 0 Flush Output From Vaporizer Manifold 3 7 Aespire 7900 3 8 Vaporizer back pressure test A WARNING Anesthetic agent vapor comes out of the common gas outlet during this test Use a safe approved procedure to remove and collect the agent 1 Setup the gas scavenging system a Connect the AGSS to a gas scavenging system b Attach a patient circuit and plug the patient port c Attach a bag to the bag port or plug the bag port d Setthe Bag Vent switch to Bag e Adjust the APL valve to minimum Set the ACGO selector switch to ABS Set the system switch to On Set the 0 flow to 6 L min Make sure that the O flow stays constant and the float moves freely Oo oc A C N Adjust the vaporizer concentration from O to 1 one click at a time The O flow must not decrease more than 1 L min through the full range If the O3 flow decreases more than 1 L min a Install a different vaporizer and try this step again b Ifthe O flow decreases less than 1 L min with a different vaporizer the malfunction is in the first vaporizer c Ifthe O flow also decreases more than 1 L min with a different vaporizer the malfunction is in the Aespire system Do not use the system until it is serviced repair vaporizer manifold port valve 7 Complete steps 3 through 5 for each vaporizer and vaporizer position 8 Setthe syste
21. If PEEP is selected static pressure on the pilot port of the exhalation valve sets the PEEP level During exhalation fresh gas flows backwards through the absorber FG into the expiratory limb downstream of the expiratory check valve For machines that are plumbed to return sample gas to the breathing system the returned gas SGR enters the breathing system after the expiratory check valve Refer to section 9 12 A z 03 SS AB 82 030 02 05 1009 0541 000 Pop off valve Figure 2 9 6 Pop off flow 7 To scavenging Figure 2 9 Flow through the pop off valve 1009 0541 000 02 05 2 Theory of Operation The pop off valve limits the pressure inside the bellows to 2 5 cm H20 above the drive gas pressure This normally occurs when the bellows reaches the top of the housing at the end of exhalation Excess gas 7 vents to the scavenging system 6 through the pop off valve and the exhalation valve J AN T d N P AB 82 031 Aespire 7900 2 3 4 Fresh gas and 0 flush flow To ABS breathing system Fresh gas 1 flows from the vaporizer manifold outlet to the ACGO Selector Figure 2 10 Switch With the ACGO Selector Switch in the ABS position fresh gas flow is channeled to the breathing system The O supply 2 is channeled to the O Flush valve When activated O flush flow joins the fresh gas flow in the ACGO Selector
22. it has a leak 17 Service Mode Tests 5 Enterthe Service Mode Push and hold the adjustment knob on the ventilator s display and set the system switch to On Select and confirm Service Mode Select and confirm Breathing System Leak Test Section 4 3 12 Follow the instructions on the screen The leak rate should be less than 200 mL min For machines with a single tube O flowmeter the pressure reading should reach 30 cm H50 at minimum flows greater than 200 mL min OO 0o oc 9 Note If test fails see Section 7 2 Breathing System Leak Test Guide 3 14 02 05 1009 0541 000 3 Checkout Procedure Bag Circuit 6 Testthe Bag circuit for leaks gt o 00 0 Setthe system switch to On Set the Bag Ventilator switch to Bag Plug the Bag port use your hand or the approved test plug Close the APL valve 70 cm H320 Set the O flow to 0 25 L min Close the patient connection using a hand or test plug on the side of the breathing system and pressurize the bag circuit with the O flush button to approximately 30 cm H 0 Release the flush button The pressure must not decrease A pressure decrease large enough to see on the gauge indicates an unacceptable leak Note If test fails see Section 7 2 Breathing System Leak Test Guide APL Valve 1 Testthe APL valve a b Fully close the APL valve 70 cm H50 Setthe total fresh gas flow to approximately 3 L min and make sure tha
23. mm SS Gauge panel 5 Disconnect the wires from the electrical switch 6 Back out the system switch mounting screws just enough to allow the knob collar to be released 7 While holding the switch assembly push in the knob and turn it counterclockwise 8 Pull the knob and collar out from the front and remove the switch assembly 9 10 02 05 1009 0541 000 9 Repair Procedures 9 Install the replacement switch assembly a Loosen the two outside screws on the electrical module ch b Insert the wires in the electrical module and tighten the screws c Pullthe wires on the electrical module to ensure that there is a good connection d e Orient the switch assembly with the Air fittings toward the right and the O Turn back the system switch mounting screws until their tips recede fittings toward the left Install the switch assembly through the gauge panel Push the knob collar in with the indicator up and turn it clockwise until it locks Tighten the mounting screws Make sure that the top edge of the switch assembly is parallel to the top edge of the gauge panel Transfer the tubing from the old system switch to the new system switch on the pneumatic module pull on the tubing to ensure that it is locked into the module 0 Out Port 4 Air Out Port 4 O O Wiring Harness Air In Port 3 O O l 0 In Port 3 Rear View 10 Test the replacemen
24. 1006 3532 000 10 47 Aespire 7900 10 25 Vent Drive and low pressure tubing 10 48 Item Description Length Size Stock Number 1 Coupler female black 1503 3128 000 2 Coupler male black 1503 3237 000 3 Coupler female white 1503 3119 000 4 Coupler male white 1503 3236 000 5 Coupler female yellow 1503 3132 000 6 Coupler male yellow 1407 3330 000 7 Tee male barb 1009 3011 000 8 Cap plug 1406 3524 000 9 Fitting coupler barb ends 1009 3077 000 10 Plug 4 mm 1006 3530 000 11 Tubing silicone 72 mm 3 8 inch 1009 3164 000 12 Tubing silicone 42 mm 3 8 inch 1009 3164 000 Tube Markings factory build only Length Size 125 VENT DRIVE black 900 mm 8mm 1009 3296 000 120 Aux 02 OUT low pressure 250 mm 1 4 inch 1605 1001 000 127 RGM return low pressure 750 mm 1 4 inch 1605 1001 000 128 unmarked low pressure 300 mm 1 4 inch 1605 1001 000 129 unmarked low pressure 151 mm 1 4 inch 1605 1001 000 130 AGSS flowtube low pressure 750 mm 1 4 inch 1605 1001 000 132 PAW low pressure 260mm 1 4inch 1605 1001 000 134 unmarked low pressure 25 mm 1 4 inch 1605 1001 000 135 unmarked low pressure 50 mm 1 4 inch 1605 1001 000 136 RGM to Scavenge low pressure 200 mm 1 4 inch 1605 1001 000 137 RGM to Circuit low pressure 300 mm 1 4 inch 1605 1001 000 144 Venturi Pilot black 330 mm 4 mm 1009 3363 000 145 Venturi Drive black 300 mm 8 mm 1009 3296 000 146 unmarked Tygon 260mm 1 2inch
25. 2 Theory of Operation 2 7 4 Drive Gas The Drive Gas Check Valve 6 is used downstream of the flow control valve to create Check Valve the pilot pressure for closing the exhalation valve during inspiratory phases The DGCV DGCV valve is biased shut by an integral weight that supplies approximately 3 5 cm H20 of bias pressure before permitting flow downstream to the breathing circuit When the ventilator is exhausting flow from the breathing circuit the DGCV permits the exhalation valve pilot pressure to be de coupled from the circuit pressure This permits the exhalation valve to open and lets gas flow to the exhaust and the gas scavenging system j 1 VentEngine Atmosphere Free Breathing Check Valve m a Vahe i Valve 110 cgi an a Drive Gas Check Valve NS Exhalation Valve VD G 5cm H20 bias 2 0 cm H20 bias 0 10 LPM Inspiratory Flow Control Valve L A 25 psig 15 LPM Figure 2 25 Drive Gas Check Valve 2 7 5 Bellows The Bellows assembly is the interface between drive gas and patient gas in the Pressure Relief breathing system The pressure relief valve or pop off valve in the bellows Valve assembly 7 controls the pressure in the breathing circuit and exhausts excess patient gas through the exhalation valve The pressure relief valve is normally closed maintaining approximately 1 5 cm H50 in the breathing circuit in a no flow condition enough to keep t
26. Make sure that the cylinders are full a Open each cylinder valve b Make sure that each cylinder has sufficient pressure If not close the applicable cylinder valve and install a full cylinder 3 Test one cylinder at a time for high pressure leaks ga c 0 000 amp Setthe system switch to Standby which stops the O flow If equipped turn the auxiliary O flow control fully clockwise no flow If equipped turn off venturi derived suction Open the cylinder Record the cylinder pressure Close the cylinder valve Record the cylinder pressure after one minute If the pressure decreases more than 690 kPa 100 psig there is a leak Install a new cylinder gasket and do this step again Repeat step 3 for all cylinders Do not leave gas cylinder valves open if the pipeline supply is in use Cylinder supplies could be depleted leaving an insufficient reserve supply in case of pipeline failure 4 Connectthe pipeline supplies one at a time and ensure that the corresponding gauge indicates pipeline pressure 3 3 Aespire 7900 3 4 Flow control tests A WARNING Nitrous oxide N50 flows through the system during this test Use a safe and approved procedure to collect and remove it 1 Oo ao Aa Co N Note 3 4 Set up the gas scavenging system a Connect the AGSS to a gas scavenging system b Attach a patient circuit and plug the patient port c Attach a bag to the bag po
27. Nd pm 5 0V 5 0V ANALOG Regulator 6 0V 6 0V ANALOG Regulator 6 0V 6 0V ANALOG Inverter 7 02 05 1009 0541 000 1009 0541 000 02 05 2 Theory of Operation Oxygen Sensor Interface The Oxygen sensor connects to the ESIB via a 6 position 4 pin modular phone jack The sensor generates a linear output voltage that depends upon the O concentration being measured The oxygen sensor produces an output of 3 to 15 mV DC in air 2196 02 It produces an output of 14 to 72 mV DC in 100 oxygen concentration The oxygen sensor amplifier provides a gain of 35 and filtering to condition the raw cell output to make it compatible with the ventilator ADC The total error ofthe measurement system including the ADC is less than 196 This is necessary because 1807767 requires the oxygen analyzer be accurate to 3 at a constant temperature The oxygen cell uses 296 of the accuracy specification not including thermal drift An O2 DISCONNECT signal is provided and is used by the ventilator software to determine that a cell is connected to the cable The signal is implemented using the disconnect loop back provided by the oxygen cell Digital ground is provided to the cell on pin 2 ofthe connector and the cell loops ground back on pin 4 of the connector The SIB passes this signal along to the ventilator CPU Board The 02 DISCONNECT signal is filtered for protection against EMI and clamped for ESD protection Flow Sensor Communicatio
28. No Exp Flow medium No expiratory sensor Check flow sensor connections for No Flow Sensor 1 connected Sensor alarm Expiratory flow sensor is connected Replace expiratory flow sensors No Insp Flow medium No inspiratory sensor Check flow sensor connections for No Flow Sensor 1 connected Sensor alarm Inspiratory flow sensor is connected Replace inspiratory flow sensor No 05 User Alarm The O supply has Air flow will continue Connect a pipeline supply or install an O5 pressure failed Ventilate manually if cylinder necessary O Flush User Alarm The pressure switch that This alarm occurs if you If persists check Failure detects flush flow has hold down the Flush O flush switch seen a very long flush button for more than 30 230 sec seconds cable to CPU board O sensor X UserAlarm No breathing circuit Install a breathing circuit module and an 05 out of circ module installed sensor On Battery UserAlarm The mains supplyis not Ventilate manually to Make sure power is connected and circuit Power OK connected or has failed save power At full breaker is closed Check ventilator fuse and the system is using charge the battery battery power permits approximately 30 minutes of mechanical ventilation Patient User Alarm Exhaled volume lt 50 Check breathing circuit and flow sensor Circuit Leak of inspired volume for at connections least 30 seconds mechanical ventilation 1009 0541 000 02 05 1 37 A
29. Perform the checkout procedure Section 3 02 05 1009 0541 000 9 Repair Procedures 9 5 Change drive gas A CAUTION 1009 0541 000 02 05 Note If you change the drive gas you must also change the drive gas selection on the service mode System Configuration setup screen Section 4 3 3 Ifthe drive gas selection and the actual drive gas do not agree volumes will not be correct The ventilator will alarm with the message Low Drive Gas Press if the selected drive gas pressure either O or Air is lost 1 Remove the rear panel Section 9 2 The O and Air pipeline manifolds have a drive gas connection at the back The connection not in use is plugged 2 Remove the plug from the new connection 3 Disconnect the drive gas hose from the present connection 4 Install the plug in this connection pull on the plug to ensure that it is locked into the fitting 5 Reroute the drive gas hose so that it does not cause kinks in other tubing 6 Connect the drive gas hose to the new connection pull on the hose connector to ensure that it is locked into the fitting 7 Doa high pressure leak test Section 3 3 8 Enter the service mode and select the correct drive gas 9 Testthe primary regulator Verify that it functions within specifications now that it will be supplying drive gas to the ventilator Section 5 1 10 Perform the checkout procedure Section 3 9 7 Aespire 7900 9 6 Service the cylinde
30. Switch j from O2 Supply DA CH CAE LG AB 74 080 Selector Switch Figure 2 10 Fresh gas and O flush flow to ABS 2 18 02 05 1009 0541 000 2 Theory of Operation Auxiliary Common Gas Fresh gas 1 flows from the vaporizer manifold outlet to the ACGO Selector Switch Outlet Figure 2 11 With the ACGO Selector Switch in the ACGO position fresh gas flow is channeled to the ACGO outlet At the ACGO outlet a small sample is diverted to the O5 Sensor in the ABS for 05 monitoring The O supply 2 is channeled to the O Flush valve When activated O flush flow joins the fresh gas flow in the ACGO Selector Switch TER o_o oo ers TAT O2 Supply Y AB 74 081 ape Selector Switch Figure 2 11 Fresh gas and Oz flush flow to ACGO 1009 0541 000 02 05 2 19 Aespire 7900 2 4 Aespire 7900 Ventilator 2 4 1 Features 2 4 2 Safety features 2 20 The Aespire 7900 Ventilator is a microprocessor based electronically controlled pneumatically driven ventilator with built in monitoring systems for inspired oxygen airway pressure and exhaled volume The ventilator is designed to be used as a medical device assisting in the delivery of anesthesia and is part of the Aespire Anesthesia Machine e Sensors in the breathing circuit are used to control and monitor patient ventilation and measure inspired oxygen concentration This lets the ventilator
31. The gauge needle should come to rest within the zero range bracket when no suction is being supplied Gauges which do not comply may be out of tolerance To check gauge accuracy be sure that the test gauge is capable of measuring 0 to 550 mm Hg with an accuracy of 1 of reading 1 Connect the suction patient port to the test gauge 2 Tum the mode selector switch to ON 3 Ensurethatthe vacuum test gauge is in agreement with the suction vacuum gauge 38 mm Hg 5 kPa at the following test points Test points Suction vacuum gauge Test gauge tolerance 100 mm Hg 13 3 kPa 62 138 mm Hg 8 3 18 4 kPa 300 mm Hg 40 kPa 262 338 mm Hg 35 45 kPa 500 mm Hg 66 7 kPa 462 538 mm Hg 61 6 71 7 kPa Note To check flow accuracy be sure that the flow test device is capable of measuring 0 30 L min 1 Connect the patient port of the suction regulator to the flow test device 2 Rotate the suction control knob fully clockwise increase 3 Tum the mode selector switch to ON and verify that the flow rate is e atleast 20 L min 4 Disconnectthe test flowmeter Tests continue on next page 6 9 Aespire 7900 6 10 Regulation Test Vacuum Bleed Test Vacuum Leak Test ao B WwW N e 1 1 Turn the mode selector switch to ON Occlude the patient port of the suction regulator Setthe vacuum regulator gauge to 100 mm Hg 13 kPa Open and close the patient port several times With the patient p
32. To upgrade the software you must install new EPROMs To order software referto Section 10 1 1 e To access the CPU board refer to Section 9 23 1 e To replace the EPROMs refer to Section 9 23 2 1009 0541 000 02 05 8 1 Notes 8 2 02 05 1009 0541 000 In this section 1009 0541 000 02 05 9 Repair Procedures This section covers the repair and replacement procedures for components of the Aespire 7900 anesthesia machine 9 1 How to bleed gas pressure from the machine cc cece eee teens 9 3 9 2 Howto remove the rear panels cece eect eee Ie 9 4 9 2 1 To remove the rear upper panel cece eee ene eee eens 9 4 9 2 2 To remove the lower access panelS 0 00 e cece eens 9 4 9 3 Howto remove the tabletop cece cece eee He 9 5 9 4 Replace pipeline inletfilter sceesssessseeee eet een n eee 9 6 9 4 1 Replace pipeline inlet check valve 00 ccc c cece eee eens 9 6 9 5 Change drive 8aS wie sessi RR RR lh dint amy ee geen de bed dete aAA 9 7 9 6 Service the cylinder supply modules 000 e cece e eee e nee ena eees 9 8 9 6 1 Tightening procedure for high pressure tube fittings eee 9 8 9 6 2 Replace primary regulator module complete replacement 9 8 9 6 3 Replace cylinderinletfilter 2 0 0 0 cc cece eee eens 9 9 9 6 4 Replace cylinder check valve 2 0c cece eee ene eee m 9 9 9 7 Replace system switch assembly
33. Verify that tee handles are tight Use a leak detector or Snoop to check for source of leak Replace gauge if defective Cylinder gaskets Use a leak detector or Snoop to check for source of leak Replace gasket if defective Use a leak detector or Snoop to check for source of leak Replace valve if defective Reseat vaporizer if not installed properly Have vaporizer serviced at vaporizer center if vaporizer leaks Check condition of o ring Replace if missing or damaged Relief valves Low Pressure Leak Vaporizer not installed properly with vaporizer mounted Missing or damaged o ring on vaporizer manifold Loose fill port 7 2 Check fill port Tighten if loose 02 05 1009 0541 000 Problem Possible Cause 1 Troubleshooting Action Low Pressure Leak with or without vaporizer Leaking port valve on vaporizer manifold Use the Vaporizer Manifold Valve Testerto check for leak See Section 9 9 2 for instructions If test fails tighten repair or replace as needed Leak at flowmeter head If vaporizer manifold passed previous tests Remove tubing from input side of head and occlude port Perform leak test If test fails Check for damaged o rings between flowmeter modules Replace as needed Check for damaged o rings at top and bottom of flow tubes Replace as needed Check for cracked flow tube Replace as needed If secondary regulator leaks replace the complete module
34. assembly Remove the ABS breathing system from the machine Using an 8 mm socket remove the nut A shoulder washer and spring from the lower assembly Liftthe bag support arm off of the swivel post Remove the old friction pad Wipe any residue and friction particles from the post Insert a new friction pad into the base Keep approximately 1 mm of space between the end of the pad and the bottom ofthe base Note Align the friction pad gap with the seam B in the base Position the retaining screw so the pin C at the base is perpendicular to the seam With the bag support arm facing forward place the base of the arm over the swivel post Ensure that the slot in the base D engages the tab E on the swivel post Replace the spring shoulder washerand nut Tighten the nutuntil 5 mm of thread extends beyond the nut arm from side to side Follow the procedure in Section 9 14 to adjust the force required to swing the bag 02 05 1009 0541 000 9 14 3 Replace bag port housing 1009 0541 000 02 05 1 Remove nut B to remove the Remove the retaining ring D Slide the bag port housing E Before installing the new bag Slide the new bag port housing Lubricate sparingly with Krytox After replacing the release 9 Repair Procedures Remove the bag support arm cover A screw and lockwasher from below release lever C off the end o
35. 0144 2117 718 2 7 CUFF FLOW SNSR 1407 3004 000 2 8 LATCH FLOW SNSR 1407 3001 000 9 SPR TORSION FLOW SNSR LATCH 1407 3005 000 10 RING TRUARC 0 188 SHAFT E RING SST 0203 5225 300 10 34 02 05 1009 0541 000 10 19 5 Breathing Circuit Module 1009 0541 000 02 05 Item 2 3a 3b 3c 3d 13 14 15 The Os cell or plug and the cell cable are not included in the breathing circuit module Description Breathing Circuit Module LENS CIRCUIT CHK VALVES O RING 44 02 ID 51 1 OD 3 53 W SI 70 DURO Check Valve Assembly RETAINER DISK 26 97D 12 7H 0 76T DISC CHK V RVSBL 1 025D SEAT UNIDIRECTIONAL V B S O RING 20 35 ID 23 90 OD 1 78W PLATE CIRCUIT FLANGE SCR SEMS M4X8 BT SKT HD W EXT L W SST 316 HOOK LATCH O RING 22 ID 30 OD 4 W SI 40 DURO O RING 12 37 ID 17 6 OD MANIFOLD CIRCUIT PIN CANISTER PIVOT RING TRUARC 0 188 SHAFT NO 5133 18H E RING SST LEVER CANISTER LATCH PIN CANISTER LEVER Os Cell includes o ring O ring cell Cable O Cell Lubricate sparingly with Krytox 10 Illustrated Parts Stock Number 1407 7002 000 1407 3101 000 1407 3507 000 1406 8219 000 1400 3017 000 0210 5297 100 1406 3396 000 1406 3397 000 1407 3110 000 0144 2436 108 1407 3604 000 1407 3104 000 1006 3968 000 1407 3100 000 1407 3109 000 0203 5225 300 1407 3102 000 1407 3108 000 6050 0004 110 1406 3466 000 1009 5570 000 10 35 Aespire 7900 10 19 6 Exhalation valve 10 36 Item Descri
36. 0541 000 02 05 7 7 Aespire 7900 Leak in Bag Mode only Perform Test 4 Testing the bag port APL Valve and Bag Vent Switch and Negative Pressure Relief Valve Re Install all breathing circuit components and repeat Breathing System Leak Test Section 7 2 1 AB 74 043 Check or Replace the Bag Vent Switch lower Seal Perform Test 5 Testing the bag port cover seal Inspect APL BTV Manifold O Ring seal and Negative Pressure Relief replace as necessary Replace APL components and repeat Test 4 If test fails the second time inspect APL component replace as necessary Flowchart 2 7 8 02 05 1009 0541 000 Perform Test 8 Testing the bellows and bellows Pop off Re Install all breathing circuit components and repeat Breathing System Leak Test Section 7 2 1 Check Replace the following Bag Vent parts Upper Seal Disk and O Ring If test fails the second time inspect Negative Relief and APL BTV Manifold O Ring Flowchart 3 1009 0541 000 02 05 1 Troubleshooting Leak in Vent Mode only Perform Test 6 Testing the bellows assembly and Bag Vent Switch Inspect Exhalation Valve and Drive Circuit AB 74 044 Perform Test 7 Testing the Bag Vent Switch Negative Relief Valve Bellows Base Manifold bellows and Pop off Valve Perform Test 8 Testing the bellows and bellows Pop off Check Replace Pop off diaphragm Bellows Housing U Cup seal and Bellows integrity
37. 10 Install the spacer on the N50 needle valve stem 11 Install the chain on the O knob sprocket assembly and the N20 sprocket 12 Install the chain and sprockets on the needle valve stems as an assembly Do not tighten the set screws Aespire 7900 Sprocket Chain Assembly 13 Install the N50 knob Snug one set screw to hold the knob in place 14 Perform the link system calibration Section 5 4 15 Install the flowmeter panel shield 16 Perform the checkout procedure Section 3 9 18 02 05 1009 0541 000 9 Repair Procedures 9 8 5 Replace 1 Remove the front flowmeter panel shield Section 9 8 1 flowmeter frame Remove the complete flowmeter head Section 9 8 3 Separate the flowmeter modules as required Section 9 8 4 Remove the flowtubes Section 9 8 2 Keep all the parts for reassembly a A WwW N Remove the gas identification panel by removing the two screws at the back of the frame Keep all the parts for reassembly 6 Remove the flowmeter frame by loosening the four mounting screws at the back of the regulator manifold Note There is a retainer in each screw location that keeps each screw within the manifold 7 To reassemble perform the previous steps in reverse order 8 Ifreplacing O or N20 frames perform the link system calibration Section 5 4 9 Perform the checkout procedure Section 3 1009 0541 000 02 05 9 19 Aespire 7900 9 20 9 8 6 Replace 0 supply switch
38. 10 16 1 Flowtube parts Item Description 1 Large flowtube kits includes float filter o rings tube c o Oo 10 11 12 13 Not Shown 10 24 Flowtube kit Air large Flowtube kit N50 large Flowtube kit Oo large Small flowtube kits includes float filter o rings tube Flowtube kit Air small Flowtube kit N50 small Flowtube kit O small Single tube flowtube kits includes float filter o rings tube Flowtube kit single tube Air flowmeters use the Large flowtube kits Flowtube kit N20 single tube dual taper with filter Flowtube kit O single tube dual taper with filter Spring top of flowtubes Float stop O large Float stop N50 large Float stop Air large O ring 17 6 OD 12 37 ID large flowtube top Filter large flowtube O ring 17 6 OD 12 37 ID large flowtube bottom red Float stop O small Float stop N50 small Float stop Air small O ring 11 26 OD 6 02 ID small flowtube top Filter small flowtube O ring 11 26 OD 6 02 ID small flowtube bottom red Ball 6 mm plug fresh gas end O ring Kit flowtubes includes 4 each of top and bottom o rings for large flowtube and 3 each of top and bottom o rings for small flowtube Silicon tube kit long including cable ties Silicon tube kit short including cable ties Stock Number 1006 8325 000 1006 8329 000 1006 8331 000 1006 8326 000 1006 8330 000 1006 8332 000 1009 8199 000 1009 8198 000 1006 3624 000 10
39. 150 Description N20 PLINE N20 FLWMOD N20 PLINE N20 CYL UNMARKED N20 CYL N20 FL WMOD SW4 02 FLWMOD REGULATED 02 REGULATED 02 02 PLINE 02 SW3 unmarked 02 CYL 02 PLINE AIR PLINE AIR SW3 SW4 AIR FLWMOD AIR CYL AIR PLINE AIR PLINE AIR GAGE N20 PLINE N20 GAGE 02 PLINE 02 GAGE VAP OUT ACGO FLWMOD VAP IN FLUSH VLV ACGO unmarked Tygon unmarked Tygon Length Size 1200 mm 4 mm 430 mm 4mm 40 mm 4 mm 800 mm 4 mm 1350 mm 6 mm 600 mm 6 mm 250 mm 6 mm 270 mm 6 mm 175 mm 6 mm 215 mm 6 mm 460 mm 8 mm 1350 mm 8 mm 270 mm 8 mm 470 mm 1 8 inch 470 mm 1 8 inch 470 mm 1 8 inch 840 mm 1 4 inch 840 mm 1 4 inch 280 mm 1 4 inch 290 mm 1 2 inch 180 mm 1 2 inch Stock Number 1001 3060 000 1001 3060 000 1001 3060 000 1001 3060 000 1001 3062 000 1001 3062 000 1001 3062 000 1001 3062 000 1001 3062 000 1001 3062 000 1001 3063 000 1001 3063 000 1001 3063 000 1006 3718 000 1006 3718 000 1006 3718 000 1001 3064 000 1001 3064 000 1001 3064 000 6700 0005 300 6700 0005 300 With an inboard N50 cylinder supply Item 106 is replaced with Item 107 and 109 joined with a tee fitting The output of the N50 cylinder is routed to the the tee fitting with Item 108 With two inboard O cylinder supplies Item 123 connects the second 05 cylinder supply to the first O cylinder supply 02 05 1009 0541 000 10 Illustrated Parts
40. 1503 3245 000 4 Fitting barbed 1504 3014 000 5 Manifold 1503 3843 000 6 Gasket manifold 1503 3845 000 7 Plate manifold 1503 3844 000 8 Screw M4x8 Pozidriv PAN 1006 3178 000 fnecessary clean with alcohol before installing new trim off flush with outside surface of seat referto removed flapper Install gasket into manifold Check to see that it is properly positioned A Carefully install plate onto manifold making sure not to disturb the gasket First start all screws Then torque to 1 7 N m 15 Ib in using sequence shown 10 46 02 05 1009 0541 000 10 24 Legris quick release fittings fU Si d is Note Not every fitting is used in all machines 1009 0541 000 02 05 Description Tees tube tube tube 4 mm N50 6 mm 05 8 mm Air 8 mm 6 mm 8 mm SCGO pilot Tees tube tube standpipe 6 mm 05 8 mm Air Drive gas Elbow tube standpipe 4 mm N50 6 mm 05 8 mm Air 1 4 inch mixed gas 1 4 inch 45 mixed gas Elbow tube tube 1 4 inch mixed gas Y 6 mm 05 8 mm Air 8 mm Y with tailpiece Plug 4 mm N50 6 mm 05 8 mm Air 10 Illustrated Parts Stock Number 1202 3653 000 1006 3544 000 1006 3545 000 1009 3297 000 1006 3862 000 1009 3370 000 1006 3533 000 1006 3534 000 1006 3535 000 1006 3737 000 1009 3368 000 1202 3804 000 1009 3043 000 1009 3044 000 1009 3360 000 1006 3530 000 1006 3531 000
41. 15V Analog Supply 12 SIB Supply VEL Supply YSW Supply 124 Light Supply GIV Current Sense Figure 4 23 Page 2 of Display A D Channels menu 4 22 Remarks Counts 2034 2038 827 811 Counts 1226 2424 2083 906 2044 2459 2071 2035 6 Display A D Channels Range Actual 0 000 L min 0 025 L min 0 680 cm H20 0 040 cm H20 100 000 0 000 Amps 0 001 Volts 13 300 Volts 0 042 Amps 120 to 120 L min 120 to 120 L min 20 to 120 cm H20 20 to 120 cm H20 Oto 100 0 to 1 024 Amps Oto 4 095 Volts 7 0 to 16 0 Volts 0 6 to 6 0 Amps Next A D Menu Go to Service Modes Menu Display A D Channels Actual 1 227 Volts 5 881 Volts 14 986 Volts 15 012 Volts 11 980 Volts 14 433 Volts 14 907 Volts 11 939 Volts 0 363 m Range 1 214 to 1 235 Volts 1 86 to 6 24 Volts 13 77 to 16 27 Volts 12 62 to 17 46 Volts 10 44 to 13 6 Volts 9 56 to 15 69 Volts 9 13 to 17 04 Volts 10 00 to 12 73 Volts 143 7 to 235 4 m Next A D Menu Go to Service Modes Menu This selection displays a listing of A D Channels which are at various values depending upon the set parameters Referto the following table for additional details for each of the displayed channels 02 05 1009 0541 000 Table 4 1 A D Channels 4 Self Tests and Service Mode A D Channel Counts Actual Range Displayed Range Special Instructions Inspiratory Flow 1800 2300 Near Zero
42. 16 mm wrench remove the needle valve by turning it counterclockwise 8 Install the new needle valve and tighten Note Be sure the o ring is properly located on the tip of the needle valve 9 If equipped install the maximum flow stop collar do not tighten 10 Install the stop collar do not tighten the screws 11 Install the flow control knob on the shaft Tighten one set screw to snug 12 Reconnect the gas supplies 13 Perform the flow control stop procedures explained in Section 5 3 1 for 05 e Section 5 3 3 for Air 14 Install the flowmeter panel shield 15 Perform the checkout procedure Section 3 02 05 1009 0541 000 9 Repair Procedures 9 9 Service vaporizer manifold parts 9 9 1 Repair 1 Setthe system switch to Standby manifold port valve 2 Remove the vaporizers from the vaporizer manifold 3 Using a 14 mm wrench carefully remove the valve nipple threaded 4 Disassemble as necessary to replace parts The following illustration shows the parts Note The port valve replacement kit includes the valve cartridge assembly and the seal The kit does i not include o rings O y O ring emm a Valve Cartridge Seal Spring Oring umm 5 When installing a new valve cartridge assembly into the vaporizer manifold put a light coat of Krytox on the bottom portion of the cartridge
43. 5 5 Aespire 7900 5 1 3 Adjusting Primary Important Cylinder supplies in an Aespire machine must have all primary Regulators regulators set to the same pressure range 50 Pin Indexed or 60 DIN If a regulator is replaced the replacement regulator must be set as required to the same specification as the one removed Important Install a full cylinder in the cylinder supply to be adjusted It is essential that the cylinder be within 1096 of its full pressure If the cylinder supply being adjusted is N50 connect a source of O and set the O flow control to the minimum stop pilot pressure for secondary regulator To adjustthe primary regulators follow the procedure in Section 5 1 1 to gain access to the regulators Do not attempt to adjust without flow 1 Slowly open the cylinder valve 2 Setthe system switch to On 3 Setand maintain the fresh gas flow of the gas being tested to 0 05 L min or minimum flow for O2 When adjusting a regulator on systems that have Adjust asingle flowtube open the needle valve 1 8 turn from the minimum stop j clockwise to achieve a flow close to 0 05 L min P j to increase B setting 4 Close the cylinder valve and allow the pressure to decay to 2068 kPa 300 D E psi as indicated on the cylinder gauge upper limit of the red band The A flow may be temporarily increased to facilitate the decay 5 When the cylinder gauge reaches the upper limit of the red band adjust th
44. 9 2 2 To remove the lower access panels 9 4 You must remove the rear upper panel to repair or replace many of the machine s components To access the 3rd cylinder supply if equipped you must remove the lower access panels SP 0 N e oO fF C N e Bleed all gas pressure from the machine Section 9 1 Ensure that all cylinder and pipeline gauges read zero before proceeding Disconnect all electrical cables Toremove the rear panel fully loosen the three captive screws that hold the panel in place Remove the panel s If the machine includes integrated suction disconnect the two tube fittings from the overflow safety trap manifold e f the machine includes electrical outlets lower the panel and place it so that it does not stress the power cable Disconnect the power cord from the AC mains supply Bleed all gas pressure from the machine Section 9 1 Ensure that all cylinder and pipeline pressures read zero before proceeding If present remove the inboard cylinders Remove the small upper access panel A to access the serial cable connectors 02 05 1009 0541 000 9 Repair Procedures 9 3 How to remove the tabletop The tabletop is held in place with five captive screws along the periphery of the pan assembly accessed from below the rim of the tabletop One screw A is in a deep recess at the right rear corner of the tabletop Two screws B are at the fro
45. Drive 10 VA limited Flow Valve Control and Drive 10 VA limited A D Converter 15 VDC Supply 10V limited DC Supply Monitoring 5V 1 8A max Canister Switch I IH i Integrated CPU IH Inspiratory and Expiratory flow transducers Drive Pressure Limit Switch Flow Sensor Bulkhead Manifold Pressure Transducer Connector Patient Airway Pressure Transducer Flow Sensor Power Supply i 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Inrush 1 Board 1 AC Inlet Circuit Breaker 1 1 an Line Filter Breathing System Figure 2 17 Electronic functional block diagram Integrated CPU 1009 0541 000 02 05 EL voltage 10 14 5V 10 5W max 12V light output 15W max 15V 170mA max 15V 100mA max 5 5 0 1 4A max Upper Chassis AB 74 071 2 25 Aespire 7900 2 6 2 Power supply Aespire machines with a 7900 Ventilator use a universal power supply for AC to DC conversion The remainder of the power supply functions are derived in the power supply circuits on the integrated CPU e DC to DC step down converter e Battery charger Multiple output DC regulator Battery charge discharge current monitor Battery voltage monitor e Task light power supply 12V AB 74 092 CHARGER and TRICKLE DISABLE BATTERY CHARGER BULK CHARGE 400mA VBatt IBatt VOLTAGE and CURRENT MONITOR
46. H50 of pilot pressure is necessary to close the valve When the exhalation port is open gas flows from the bellows housing to the scavenging port Over Pressure Ml m H20 Drive Gas Check Valve i 3 5 cm H20 bias 0 10 LPM Drive Gas 0 10 LPM Patient and Fred 0 20 LPM Total Typical Flo Control Bleed to Ambient H E 1 0 0M 3 0 cm H20 i continuous ate dependeny Figure 2 27 Exhalation valve 02 05 1009 0541 000 2 7 7 Mechanical Overpressure Valve 2 7 8 Reservoir and bleed 1009 0541 000 02 05 resistor 2 Theory of Operation The Mechanical Overpressure Valve MOPV is a mechanical valve 14 that operates regardless of electrical power It functions as a third level of redundancy to the ventilator s pressure limit control functions supplying pressure relief at approximately 110 cm H50 rc 1 Vent Engine Atmosphere Free Breathing Mechanical Over Pressure T Valve 110 cm H20 1 Inspiratory Flow Control Valve L Figure 2 28 Mechanical overpressure valve The reservoir 15 is a 200 ml chamber that dampens the manifold pilot pressure pulses to the exhalation valve The bleed resistor 16 is a controlled leak from O to 12 l min in response to circuit pressures from 0 to 100 cm H50 The small quantity of pneumatic flow exhausting through the bleed resistor permits control of the exhalation valve s pilot pressure by modula
47. I 7 22 Testing the inspiratory side of the circuit module 0 cece eee ee 7 23 Testing the negative pressure relief valve esses 1 24 Testing the flow sensors only sssssssseseses I 1 25 Testing a flow sensor including the Ventilator Monitoring Assembly and interfacing Components e ied ta Nee Aron hee ERE hs RE inde 7 26 Objects in the breathing system can stop gas flow to the patient This can cause injury or death Donotuse atest plug that is small enough to fall into the breathing system e Make sure that there are no test plugs or other objects caught in the breathing system Do not use O Flush for leak isolation tests Do not leave pressurized systems unattended High pressure and equipment damage may result 02 05 1009 0541 000 Test 1 Machine Test Tool Front View not connected t Back View 1009 0541 000 02 05 7 Troubleshooting Verifying the integrity of the test tools ao PB WN Verify integrity of low pressure leak test device Put your hand on the inlet of the leak test device Push hard for a good seal e Squeeze the bulb to remove all air from the bulb If the bulb completely inflates in less than 60 seconds replace the leak test device Attach the low pressure leak test device to the Machine Test Tool Plug the two pressure orifices Repeatedly squeeze and release the hand bulb until it remains collapsed Ifthe bulb inflates in less than 30 seco
48. L min 120 to 120 L min Zero Offset Reading nominal 2050 Counts Expiratory Flow 1800 2300 Near Zero L min 120to 120 L min Zero Offset Reading nominal 2050 Counts Airway Pressure 550 1050 Near Zero cm H20 20 to 120 cm H20 Zero Offset Reading nominal 800 Counts Manifold Pressure 550 1050 Near Zero cm H20 20 to 120 cm H20 Zero Offset Reading nominal 800 Counts 02 0 4095 O to 100 0 to 100 Count weight and limits are determined during 02 calibration Flow Current Sense 0 4095 0 to 1 024 Amp Oto 1 024 Amps Flow DAC Feedback 0 4095 0 to 4 095 Volts 0 to 4 095 Volts Battery Voltage 1740 3976 7 to 16 Volts O to 16 48 Volts lt 7V Low battery voltage failure lt 11 65V Low battery voltage warning gt 16 Volts 10 Sec High battery voltage failure Battery Current 700 4000 600mAto6Amps 2 to 6 19 Amps 150 to 600 mA Battery charging 601 mA to 2 Amps Charge current out of range 2300 mA Operating on battery gt 6 Amps Battery discharge current out of range 1 225 Voltage 1214 1235 1 214 to 1 235 Volts Oto 4 095 Volts Reference 5 8V Voltage Test 1997 2565 4 86 to 6 24 Volts 0 to 9 96 Volts 15V Analog Supply 1914 2262 13 77 to 16 27 Volts 0 to 29 46 Volts 15V Analog Supply 858 953 12 62 to 17 46 Volts 61 to 1 43 Volts 12V SIB Supply 1779 2322 10 44 to 13 62 Volts 0 to 24 Volts VEL Supply 1645 2675 9 56 to 15 69 Volts Oto 24 Volts VSW Supply 1269 2368 9 13 to 17 04 Volts 0 to 29 46 Volts 12V Light
49. LPM 3 0 cm H2O m 7 System Switch if continuous rate dependent 1 i Absorber Oe a e ERR Vent to Ambient Canister ere J NO ges ae llle psi Balance DPA LEN 30 psi Regulator Air opt 02 X i 7 Flush Os I Switch i NC 1 Sensor e xo pe He m9 Supply i Ha r Switch t 25 M Se decas ACGO 1 Selector al 1 RM orc Valve IT K i i Lo y ies psa ACGO Flowmeter Modue Airway Dual Flowtubes Optional E Pr dn mi E Gauge O 5 5 psi Pressure r4 1 A wl 1 Inspiratory ORO 6 I og LS Y xo ow as 5 9 S S g gee E amp 90 2 2 Z 1 O0 o G 2 g i iL a 2 5 e g S8 6 ui 1 pe s Enhanced Sensor Interface Board Figure 11 1 System connection block diagram 11 2 Flow Ir To Scavenging 02 05 1009 0541 000 11 Schematics and Diagrams Scavenging Scavenging Scavenging From System From System From System 10 cm H20 10 cm H20 10 cm H20 rial iiia Relief Valve Fai icis Relief Valve ve noms Relief Valve 0 3 cm H20 Entrainment 0 3 cm H20 Entrainment 0 3 cm H20 Entrainment I i 1 i I i I 1 ifm Room l Ic igh or Low Air I High or Low i Filter FlowOrifice I l Flow Connector to T l Needl
50. Pressure Sensitivity i cecus cee dee er md re RE YER ee 4 31 4 3 22 Calibrate Flow Valve 2 cece IH 4 32 4 3 23 Bleed Resistor Calibration 0 cece eect eee eee eens 4 33 4 3 24 Service Calibrations Required 00 c cece eee eee eee eens 4 34 V Aespire 7900 vi 5 Calibration 5 1 Primary Regulators 2s re rire eee et nde pee and eee ees PV ce bees eee 5 2 b TT Testsetup oen tea does end shart GUS Oke la eed hey 5 2 5 1 2 Testing Primary Regulators 0 cece eee teen I 5 2 5 1 3 Adjusting Primary Regulators 02 0 cece eect eee eens 5 6 5 2 Secondary Regulators 0 e cece ene en 5 7 5 2 1 Testing Adjusting Secondary Regulators or Balance Regulators 5 7 5 3 Flowmeter Needle Valve Calibration 00 c cece nee III 5 8 5 3 1 O Needle Valve Calibration Minimum Flow leen 5 8 5 3 2 N50 Needle Valve Calibration Minimum Flow 5 10 5 3 3 Air Needle Valve Calibration Minimum Flow sasaaa 5 14 5 4 Link system calibration slslsssssssseesesII m 5 17 5 5 Airway pressure auge ssssssssssse mnn 5 22 5 5 1 Zero the pressure gauge i eee 5 22 5 5 2 Checking the pressure gauge accuracy cece eee eee eee 5 23 6 Installation and Maintenance 6 1 Aespire 7900 Installation Checklist 6 2 6 2 Aespire 7900 Planned Maintenance cece eee eee eee eens 6 4 6 2 1 Every twelve 12 months 2 cece ene eee eee eee ees 6 4 6 2 2
51. Procedures 9 10 Replace ACGO selector switch Removal Replacement 1009 0541 000 02 05 1 2 9 Remove the tabletop Section 9 3 Clip the tie wraps 1 from the outlet barb fittings at the side of the switch 3 Disconnect the fresh gas 2 and flush 3 tubes at the back of the switch Disconnectthe wires from the ACGO mode microswitch 4 at the back of the selector switch Disconnect the wires from the flush pressure switch 5 on top of the selector switch Set the ACGO selector switch to ABS Back out the selector switch mounting screws 6 until the tips are flush with the face of the mounting casting While pushing the selector knob toward the machine and holding it steady push the valve body toward the knob and rotate it counterclockwise to separate the valve body from the knob assembly Remove the knob assembly and protective shroud from the machine 10 Remove the valve from the silicone output tubes 1 Remove the knob assembly from the valve body Back out the selector switch mounting screws until the tips are flush with the face of the mounting casting Guide the outlet fittings of the valve body into their respective silicone tubes Hold the selector knob with the indicator mark facing down Turn the chrome collar to its maximum counterclockwise position as viewed from the front 9 31 Aespire 7900 9 32 Test procedure 10 11 12 1
52. Service Repair Priority Removal Criteria Sustained high In range Paw data Paw gt sustained limit Check absorber gage to see if the indicated Paw available for 15 seconds 10 sustained Paw is present Check the breathing circuit Perform flow sensor calibration Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board System low In range flow data Vaeliverea gt larger of Check flow sensors connections Leak available Vz Pmax CF 0 3 V Check drive gas or If Heliox is used check that Heliox is selected on the ventilator setup menu Vy Pmax CF 200 Ses D Check the breathing circuit and drive circuit Where oe i TM Perform flow sensor calibration CF compressibility factor 10 Replace the flow sensors Four consecutive breaths measured with correct Check ESIB to CPU cabling volume seen by flow sensors Replace the ESIB board Replace the CPU board Vaux_ref Minimum 5 8V out of range Replace the CPU board Out of Shutdown Range 5 Ventilate Minimum Refer to specific alarm message represented Manually Shutdown by XXXXXX XXXXXX or Minimum Monitoring Vext ref Out Minimum 1 225V out of range Replace the CPU board of Range Shutdown 5 Volume medium In range flow data No measured breaths in Check that mechanical ventilation is on Apnea available the last 30 seconds Check the breathing circuit A breath is measured or apnea alarm detection off Check ventilator settings and volume ou
53. Vent switch and the negative pressure relief valve p Plug Bag Port 1 Separate the Bellows Module from the Circuit Module and re install the Bellows Module Occlude the Bag Port connector Connectthe Machine Test Tool to the interface ports as shown above Set the Bag Vent switch to Bag and close the APL Valve 70 cm H30 a A WwW N Slowly increase the O flow to achieve 30 cm H50 e The leak rate is equal to the flow needed to maintain 30 cm H30 e The leak rate should be less than 200 mL min Note If the bellows rises it indicates a leak in the Bag Vent Switch 7 16 02 05 1009 0541 000 7 Troubleshooting Test5 Testing the APL diaphram Plug APL Scavenging Port Plug Bag Port Note If required set up the Machine Test Tool and breathing system as shown in Test 4 1 Slide the Bellows Module away from the machine Remove the APL ramp and diaphragm 2 3 Insert a Test Plug into the APL scavenging port as shown above 4 Slide the Bellows Module partially back onto the machine casting 5 Ensure that the Bag Port is plugged and that the Bag Vent switch is set to Bag 6 Slowly increase the O flow to achieve 30 cm H50 Leak rate is equal to the flow needed to maintain 30 cm H50 s The leak rate should be less than 200 mL min 1009 0541 000 02 05 7 17 Aespire 7900 Test6 Testing the bellows module and the Bag Vent switch 1 Separate the Bellows M
54. a new vaporizer pressure relief valve To reassemble perform the previous steps in reverse order Perform the checkout procedure Section 3 9 29 Aespire 7900 9 9 5 Replace vaporizer manifold 9 30 gt WwW N Remove the upper rear panel Section 9 2 Remove the front flowmeter shield Section 9 8 1 Remove the right side panel A From the front of the machine remove the screw B at the right upright of the flowhead bezel From the back of the machine remove the two screws C that hold the vaporizer manifold vertical support to the flowhead bracket From the back of the machine remove the two screws D that hold the vertical support to the vaporizer manifold Remove the vertical support from the machine While holding the vaporizer manifold remove the two screws E at the right hand extrusion to release the manifold m Install the new vaporizer manifold in reverse order Do not fully tighten the screws until they are all in place s Attach the new manifold to the right hand extrusion E e Attach the vertical support to the vaporizer manifold D e Attach the bottom of the vertical support to the flowhead bracket C s Attach the vertical support to the front bezel B 10 Tighten the mounting screws in the following order E D C B 11 Reassemble the machine 12 Perform the checkout procedure Section 3 02 05 1009 0541 000 9 Repair
55. active These settings include s Rate for SIMV and PSVPro e Trigger Window e Flow Trigger Level s Insp Termination Level e Tinspired User Select Defaults Parameter Range Ventilation Mode Vr 20 1500 mL Pinspired 5 60 cm H20 Rate for Vol Cntrl and Pres Cntrl 4 100 breaths min Rate for SIMY and PSVPro 2 50 breaths min EE 2 1 1 8 Plimit 12 40 cmH20 Inspiratory Pause Off 5 60 Figure 4 11 Page 1 of User Select Defaults menu User Select Defaults Parameter Range Current Value Volume Control 500 mL 10 cm H20 12 breaths min 12 breaths min 1 2 40 cm H20 10 of Ti More Default Go to Service Modes Men Page 2 of 2 Current Value Low Oz alarm limit 18 99 High O2 alarm limit 21 99 Off Low Ve alarm limit Off 0 1 10 L min High Ve alarm limit 0 5 30 L min Off Low Vre alarm limit Off 5 1500 mL High re alarm limit 20 1600 mL Off Trigger Window 0 80 Flow Trigger Level 0 2 10 L min Insp Termination Level 5 75 Tinspired 0 2 5 0 sec Figure 4 12 Page 2 of User Select Defaults menu 4 12 Off 2 0 L min 10 0 L min Off 1000 mL 25 2 0 L min 30 15 sec More Defaults Go to Service Modes Menu 02 05 1009 0541 000 Powerup End Case Settings 1009 0541 000 02 05 A CAUTION 4 Self Tests and Service Mode If Last Case is selected the system saves settings when the unit is turned off and powers up with the same s
56. alarm back to 100 and make sure that alarm cancels After 2 minutes in pure O the O display reads approximately 100 m Turn the O flow control fully clockwise minimum flow 15 Setthe system switch to Standby 1009 0541 000 02 05 3 13 Aespire 7900 3 11 Breathing system tests A WARNING Objects in the breathing system can stop gas flow to the patient This can cause injury or death e Donotuse a test plug that is small enough to fall into the breathing system 1 Verify that AGSS is operating For systems that have a flow indicator on the side make sure that the flow indicator shows a flow in the green normal region 2 Zero the pressure gauge Section 5 5 1 Check Valves 3 Make sure that the check valves on the breathing circuit module work correctly a The Inspiratory check valve rises during inspiration and falls at the start of expiration b The Expiratory check valve rises during expiration and falls at the start of inspiration Ventilator Bellows 4 Ventilator bellows test a Setthe system switch to Standby b Set the Bag Vent switch to Ventilator c Setall flow controls to minimum d Close the breathing circuit at the patient connection Use the test plug located on the side of the ABS Push the O flush button to fill the bellows f The pressure must not increase to more than 15 cm H30 on the pressure gauge g If the bellows falls more than 100 mL min top of indicator
57. bellows circuit down tube or Y manifold d base upstream of exhalation valve 4 Check breathing circuit for Check for obstruction downstream incorrect assembly or obstructions of exhalation valve in connecting tube or Y manifold AB 29 094 1 48 02 05 1009 0541 000 1 Troubleshooting 1 8 Power supply test points Integrated CPU F AO Co TP214 TP213 J203 J201 TP209 AB 74 066 penu AN moo 9 TP2 TP201 TP200 TP Name Typical Value Description 1 15V 15V Analog 15V supply 2 15V 15V Analog 15V supply 200 VCHGR 16V From power supply 201 PGND OV Power chassis ground 202 VMAIN 12 5V From power supply 207 AGND OV Analog ground 209 5 8V 5 8V Supply for inlet valve flow valve speaker 213 VH EL 14 5V Supply for EL display 214 12VLP 12V Supply for light package Note 1009 0541 000 02 05 The power supply outputs are 16 volts and 12 5 volts The 16 volts is used to charge the battery It is only available when the machine is connected to an AC supply s The 12 5 volts is used to generate the regulated voltages on the CPU board In case of power outage the CPU power circuits are supplied by the battery 7 49 Notes 7 50 02 05 1009 0541 000 8 Software Installation System software resides on two EPROMS U14 and U23 on the CPU board
58. by default Figure 2 15 Enhanced Sensor Interface Board ESIB 2 5 4 Pneumatic Vent Engine Figure 2 16 Pneumatic Vent Engine 2 24 The pneumatic Vent Engine is located in the back chamber of the breathing system that is shielded to contain EMI emissions The enclosure includes the Vent Engine and the Vent Engine Connector Board The pneumatic Vent Engine comprises the hardware that drives the ventilator bellows It includes a drive gas inlet filter a gas inlet valve GIV a supply gas pressure regulator a flow control valve a drive gas check valve a mechanical over pressure relief valve MOPV a bleed resistor a free breathing check valve 02 05 1009 0541 000 2 Theory of Operation 2 6 Electrical 2 6 1 Block The Aespire 7900 Ventilator electronic electrical subassemblies or modules include diagram Universal power supply AC to DC converter CPU board with power supply and digital circuits Control module Ventilator display Enhanced sensor interface board ESIB e Sealed lead acid battery Control Module Ventilator Display EL Display AC Power Membrane Switches Task Light Outlets Connector Board Optical Encoder Speaker 02 Supply Switch i Vent Engine 68340 Microcontroller Memory and 1 0 Decoding Bag Vent Switch 4 Flash SRAM and EEPROM SCR Circuitry D A Converter Watchdog System Inlet Valve Control and
59. detection fluid Snoop to the end of the tube to form a bubble 5 14 02 05 1009 0541 000 1009 0541 000 02 05 5 Calibration 10 Turn the needle valve clockwise until the bubble no longer inflates Do not turn more than 10 degrees clockwise past this point 10 degrees gt 11 Push the stop collar against the valve body 12 Turn the collar clockwise until the collar stop tab contacts the minimum stop tab on the valve body Do not turn the valve stem Collar Stop Valve Stop Collar Collar stop must be on CCW side of valve stop N 7 5 15 Aespire 7900 13 Carefully pull the collar back so there is a slight gap between collar and the valve body but still engages the valve stop Collar Setscrew example 14 Tighten the collar setscrews Start with the one opposite the tab if possible 15 Turn the valve stem counterclockwise at least one revolution to make sure the collar tab clears the valve stop ll Stops must clear If stops do not clear a Turn the valve stem back to minimum position b Loosen the collar setscrews c Repeatsteps 11 through 14 16 Turn the valve stem clockwise to the minimum stop 17 Verify there is no flow at the end of the tube 18 Thoroughly clean the end of the nylon tube and reconnect itto the vaporizer manifold inlet 19 Setthe knob so that at minimum flow the label text is horizontal and the knob is on an even plane front to back with the N20 an
60. does not exceed 85 cm H20 Some pressure fluctuation is normal c Fully open the APL valve to the MIN position d Set Op flow to 3 L min Turn any other gases off e Make sure that the value on the inspiratory pressure gauge is less than approximately 5 cm H50 f Push the O flush button Make sure that the value on the inspiratory pressure gauge stays less than 10 cm H30 g Setthe O flow to minimum and make sure that the value on the inspiratory pressure gauge does not decrease below 0 cm H5O 8 Remove your hand or the test plug from the patient connection 9 Setthe System switch to Standby A WARNING Make sure that there are no test plugs or other objects caught in the breathing system 7 6 02 05 1009 0541 000 1 Troubleshooting 7 2 2 Breathing System Troubleshooting Flowcharts Review Leak Test Guide Section 7 2 Do machine low pressure leak test Section 3 9 e Isolate breathing system leak to Bag Mode Vent Mode or Both Section 7 2 1 Perform Leak Test 1 Verifying the integrity of test tools Perform Test 2 Low pressure leak testing the machine Repair leak in machine Leak in Bag M Vent S Go to Flowchart 2 Mode van Mode Mode Go to Flowchart3 only or Both only g Both Bag and Vent Mode Perform Test 3 Testing the pressure gauge and port U cup seals Inspect Replace tubing to gauge Replace U Cup seals Pass Go to Flowchart 4 Flowchart 1 1009
61. down the 5 volt power supply to the EEPROMs The second regulator produces analog 5 volts with another LP2951 This supply is used to power all of the operational amplifiers and pressure transducers The third regulator produces analog 6 0 volts with another LP2951 This regulator powers an ADM660 switched capacitor inverter to generate analog 6 0 volts These supplies power all of the instrumentation amplifiers EMI Filters and ESD Suppressors ACGO Connector 8 8 2 3 o5 8 88 te amp z a DPL Switch EMI Filters and ESD Suppressors 45V Regulator EEPROM SCLK Clock SCLK Receiver INSP DATA EXP BAG VENT DATA CPCVR OPEN CANI REL BYPASS OVER PRESS Manifold Pressure Transducer Noise Insp Filter J 1A Inspiratory Pressure Adjustable Gain Transducer Noise Exp Filter A Airway Pressure Adjustable Gain and Offset Transducer Noise manif Filter IA Expiratory Pressure Adjustable Gain Transducer Noise Airway Filter A Insp Buffer Exp Buffer Manif Buffer Adjustable Gain and Offset EMI Filters and ESD Suppressors O2 Sensor Connector NY gt gt O2 Buffer Control Board Connector MANIF MANIF_RET INSP_RET AIRWAY AIRWAY_RET EXP EXP RET 77 02 O2 RET O2 DISCONNECT 12V e o e
62. eee 7 46 7 7 4 No ventilation troubleshooting 7 47 7 7 5 High intrinsic PEEP troubleshooting 1 48 7 8 Power supply test points sssesssessssses II 7 49 8 Software Installation 9 Repair Procedures 9 1 How to bleed gas pressure from the machine cc cece cece teen eee 9 3 9 2 Howto remove the rear panels 0c c cece eee eee tenet Ie 9 4 9 2 1 To remove the rear upper panel cece cece eee eee eens 9 4 9 2 2 To remove the lower access panels 0 00 cece cece eee eee eens 9 4 9 3 Howto remove the tabletop cece cece eee Ie 9 5 9 4 Replace pipeline inlet filter 0 0 cece cece eee eet ene e eee 9 6 9 4 1 Replace pipeline inlet check valve 0 0 cece cece ene 9 6 9 5 Change drive gas csse ex nre tek dave RR EX RE VE EA DR EE yA Gane 9 7 9 6 Service the cylinder supply modules sssssesssseseeern 9 8 9 6 1 Tightening procedure for high pressure tube fittings 0 eae 9 8 9 6 2 Replace primary regulator module complete replacement 9 8 9 6 3 Replace cylinderinletfilter 0 ccc cece eee eee eens 9 9 9 6 4 Replace cylinder check valve 02 0c cece cece eee m 9 9 9 7 Replace system switch assembly 0 00 cece cece cece n 9 10 9 8 Service the flowmeter module 0 00 cece cette tenet m 9 12 9 8 1 Remove front flowmeter panel shield 0 0 cece eee eee eee 9 12 9 8 2 Remove flowtubes for cleaning or r
63. flowhead module with dual flowtubes 0 flowhead module with single flowtube N50 flowhead module with dual flowtubes N50 flowhead module with single flowtube Air flowhead module with dual flowtubes manifold without regulator Air flowhead module with single flowtube manifold without regulator Secondary regulators Balance Regulators Regulator Kit O adjustable without pressure switch Regulator Kit N20 pressure balancing Needle Valve Manifold Kit Air without regulator Stock Number 1006 8380 000 1009 8069 000 1006 8381 000 1009 8070 000 1009 8405 000 1009 8404 000 1006 8341 000 1006 8344 000 1006 8322 000 02 05 1009 0541 000 Item Description Stock Number 3 Flowtube Module includes housing o rings and plug ball does notinclude flowtubes label or label panel order separately Flowtube module O dual 1006 8338 000 Flowtube module O single 1009 8234 000 Flowtube module N50 dual 1006 8337 000 Flowtube module N50 single 1009 8235 000 Flowtube module Air dual 1006 8333 000 Flowtube module Air single 1006 8334 000 4 Tube intermodule connector 1006 3628 000 5 O ring intermodule connector 1006 3613 000 6 Clip U type self retaining 1006 4350 000 7 Screw M5x30 module mounting 1102 3049 000 8 Screw M5x55 02 N20 3rd gas module connect 1006 3607 000 Screw M5x110 05 Air module connect 1006 3080 000 Washer M5 0 Air module connect 1006 1459 000 Nut M5 K
64. for these regulator is self locking T Disconnect the test device and plug the test port pull on the plug to ensure itis locked in the fitting 8 Perform the Flow Control Tests Section 3 4 1009 0541 000 02 05 5 7 Aespire 7900 5 3 Flowmeter Needle Valve Calibration You need to calibrate a needle valve if you install a new one e if minimum and maximum flows are not within specifications 5 3 1 0 Needle Valve Calibration Minimum Flow A CAUTION 5 8 Do not force the needle valve againstthe seat Overtightening the valve can cause the minimum flow setting to drift out of specifications 1 2 Set the system switch to Standby Remove the flowmeter panel shield Section 9 8 1 Note If adjusting an existing needle valve remove the N50 and O knob and sprocket assemblies and loosen the O stop collar setscrews Slide a stop collar onto the valve stem with the stop tab toward the valve Do not tighten setscrews Stop Valve Stop Tab Stop Collar a Tab S m Valve Stem Setthe system switch to On Adjust the O needle valve to maintain a flow of s 50 25 mL min for dual tube flowmeters s 200 25 mL min for single tube flowmeters Push the stop collar against the valve body 02 05 1009 0541 000 5 Calibration T Turn the collar clockwise until the collar stop tab contacts the minimum stop tab on the valve body Do not turn the valve stem Collar Stop Valve Stop C
65. inlet valve solenoid Go to Display 1 0 signals screen DPL switch status must be Off If On is indicated remove the bellows assembly If On continues to be displayed replace the ESIB Perform Cal bleed resistor from service mode to ensure there is no problem with the bleed resistor Replace the ESIB Replace the CPU board Gas Inlet Valve Failure Minimum Monitoring Incorrect feedback Perform the gas inlet valve test Check the cable to the gas inlet valve from the CPU board Check the gas inlet valve resistance 25 2 ohms Replace the CPU board Hardware Watchdog Failure 6 Heliox Mode Minimum Shutdown 5 low Ventilator malfunction Ventilate manually Monitoring is not reliable Replace the CPU board HelioxMode low The Heliox option isnot j SetMelioModetoOff is On The Heliox option is not available in Aespire 7900 Refer to Section 4 3 3 3 Heliox Mode 1009 0541 000 02 05 1 33 Aespire 7900 Message Alarm type Enabling Criteria Alarm Condition Service Repair Priority Removal Criteria High 02 medium In range O data 0 gt high limit Check O limit Is actual O higher than limit available and alarm setting limit not off Verify O calibration has been done correctly Alarm condition becomes false or enabling criteria Does calibration pass becomes false If calibration does not pass replace O
66. l G 250V 20 130 15 2W 2 l Fi RV1 1A D6521Z0V141RA20 250VAC BLU NEUTRAL IN FUSE2AG NEUTRAL OUT l RV3 D6521Z0V141RA20 140V Common 1 Mode c2 U 5B 250V l 2 15 GND GRN YEL CHASSIS GROUND e gt gt e i EQUIPOTENTIAL STUD e CHASSIS GROUND DE CONNECTOR VIO BRN BLU BLK WHITE CONNECTOR Power Supply L LINE FILTER 5A L FUSE Figure 11 7 Schematic AC Inlet module 100 120 V Isolated outlets 11 8 AB 74 084 02 05 1009 0541 000 INRUSH PCA 220 240V CONNECTOR OUTLET BREAKERS COUNTRY SPECIFIC OUTLETS ISOLATION TRANSFORMER THERMAL FUSE 130C THERMAL FUSE 130C ORN CONNECTOR R2 6 8 l r 1 AC INLET MODULE 8A l i SYSTEM BREAKER w Kt l LINE IN LINE OUT LINE AN i BRN s m FUSIBLE Ej la y FILTER la RV2 1 5KE440CA 6 ommno 15 n ROCKER D65Z0V271RA140 SS 440V i KH115 l 275V 5 1 240V AC INLET f 1500W l IEC 320 Differential JH1A W AC240V Q SOLID l Mode 1 G1 R1 STATE SS a a ee U 9B 10 DELAY 470V 2W TIMER l 15 20 2 CERAMIC 2 l F1 RV1 1A D65Z0V271RA140 250VAC BLU NEUTRAL IN 275V F SE2AG NEUTRAL OUT RV3 D65Z0V271RA14
67. mechanical ventilation is on the sustained limit is calculated as follows for pressure limits lt 30 cmH 0 the sustained pressure limitis 6 cm H20 for Plimit between 30 and 60 cmH 0 the sustained limit is 20 of the pressure limit Plimit for pressure limits gt 60 cmH 0 the sustained pressure limit is 12 cm H 0 If both PEEP and Mechanical ventilation are on the sustained pressure limit increases by PEEP 2 cmH 0 the compensated weight of the bellows When mechanical ventilation is off the sustained pressure limit is calculated as follows for pressure limits 60 cmH50 the sustained pressure limit is 50 of the pressure limit Plimit for pressure limits gt 60 cm H 0 the sustained pressure limit is 30 cmH 0 1009 0541 000 02 05 7 41 Aespire 7900 7 6 Mechanical electrical troubleshooting guide Symptom The power supply circuits are located on two modules the AC to DC converters are on a universal power supply PS the regulated power circuits are integrated into the CPU board IntCPU For power supply test point refer to Section 7 8 Probable cause Action System on AC LED on no display Refer to section 7 7 2 No display troubleshooting AC LED not on 1 Power cord 1 Is the cord plugged in 2 AC power 2 Is the power outlet 0 k 3 Circuit breaker 3 Check main circuit breaker in the AC Inlet module 4 50 pin cable front panel to CPU board 4 Check cable connection 5 Power supply board
68. on Check flow sensor connections for No Flow Flow 1 available in mechanical expiratory sensor during Sensor alarm ventilation inspiration in circle Check the breathing circuit system ne Perform flow sensor calibration Two consecutive breaths measured with correct Check insp exp check valves flow seen by flow sensors Replace the flow sensors Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board 7 32 02 05 1009 0541 000 1 Troubleshooting Message Alarm type Priority Enabling Criteria Alarm Condition Removal Criteria Service Repair Flow Valve Failure DAC or Current Minimum Monitoring 7 8 Incorrect feedback Perform the flow valve test Check the flow current sense from the service mode Display A D channels Should be near zero counts If not replace the CPU board Check the cable to the flow valve from the CPU board Check the flow valve resistance approximately 1 75 0 1 ohm This must be tested at the flow valve not through the cable from the CPU board If not correct replace the flow valve Replace the CPU board Gas Inlet Valve Failure 6 Minimum Shutdown 5 Bootup test failure Check the GIV current sense from service mode under Display A D channels 2371 to 3884 counts If out of range check the CPU to gas inlet valve cabling Then measure the gas inlet valve resistance to be 25 2 ohms If not replace the gas
69. or a crush hazard Use care when moving or replacing system parts and components Some internal parts have sharp edges and can cause cuts or abrasions Use care when servicing internal components When servicing the ventilator extreme care must be taken to avoid introducing foreign debris particularly metal chips generated by screw threads into the pneumatic flow passages ofthe ventilator Failure to do so can result in damage to the flow valve and possible injury to the patient After repairs are completed always perform the checkout procedure Refer to Section 3 of this manual 9 1 How to bleed gas pressure from the machine 1009 0541 000 02 05 Before disconnecting pneumatic fittings bleed all gas pressure from the machine 1 Setthe system switch to On 2 Close all cylinder valves and disconnect all pipeline supplies from the source Note If the machine includes N50 do not disconnect the O pipeline If pipeline O is not available open the O cylinder valve 3 Turn the flow controls for all gases except 0 at least one turn counterclockwise 4 Ensure that all cylinder and pipeline gauges read zero before proceeding For machines with N50 disconnect the O pipeline supply from the source or close the O cylinder valve Press the O flush button to bleed O from the system 5 Setthe system switch to Standby 9 3 Aespire 7900 9 2 How to remove the rear panels 9 2 1 To remove the rear upper panel
70. supply drive gas to the ventilator Test B For all gases not used to supply drive gas to the ventilator TestA For primary regulators that supply drive gas to the ventilator 0 or Air 5 2 02 05 1009 0541 000 5 Calibration Under low flow conditions the output pressure of a properly adjusted functioning regulator should fall within specifications listed in step 4 Under high flow conditions the output pressure should not drop below the specifications in step 12 1 Remove the bellows assembly 2 Slowly open the cylinder valve 3 Setthe system switch to On 4 Low Flow Test Set the fresh gas flow to 0 05 L min or minimum flow for 0 When checking an Air regulator on systems that have a single flowtube open the needle valve 1 8 turn from the minimum stop to achieve a flow close to 0 05 L min Close the cylinder valve and allow the pressure to decay to 2068 kPa 300 psi as indicated on the cylinder gauge upperlimit ofthe red band The flow may be temporarily increased to facilitate the decay Atthe time that the cylinder pressure reaches 2068 kPa 300 psi set the system switch to Standby e Within one minute the test device must stabilize between 60 DIN 372 400 kPa 54 58 psi 50 Pin Indexed 310 341 kPa 45 0 49 5 psi fthe test device pressure does not stabilize within one minute replace the cylinder supply Ifthe test device stabilizes within one minute but the readings are not within
71. switches Electronic switches 4 24 ACGO Switch Vent or Aux CGO CO Bypass Off or On hard wired On in Aespire 7900 machines e Canister Status Closed or Open s Control Panel Cover Closed or Open refers to removal of the ABS on Aespire 7900 Machines Bag Vent Status Bag or Vent Pressure Limit Status Off or On e O Flush Off or On e O5 Supply Pressure Pressure or No Pressure O5 Sensor Connected or Disconnected Breathing Circuit Switches Circuit module ID In Aespire 7900 machines the switch positions are hard wired in the ESIB to ABS harness to indicate Circle patient circuit e Breathing Circuit SW1 On e Breathing Circuit SW2 On e Breathing Circuit SW3 Off 02 05 1009 0541 000 4 3 15 Display Battery Status Figure 4 25 Display Battery Status menu 1009 0541 000 02 05 4 Self Tests and Service Mode The software displays the battery charge status This checks the battery charge current Note A negative current value means the battery is charging Battery Status Values Displayed On Battery Battery Current gt 0 300 Amps Battery Charging 0 600 lt Battery Current x 0 150 Battery Charged none of the above Display Battery Status Battery Status Battery Charged A D Channel Counts Actual Range Battery Voltage 3312 13 300 Volts 7 0 to 16 0 Volts Battery Current 977 0 042 Amps 0 6 to 6 0 Amps Go to Service Modes Menu If the batte
72. test Mechanical ventilation Bag position manual ventilation Expiratory flow O Flush button Serial Number 02 05 1009 0541 000 O08 amp lt 345 kPa Cy ZH Alarm silence touch key End case touch key Circle breathing circuit module ty The primary regulator is set to pressure pe less than 345 kPa 50 psi Absorber on AN c02 Absorber off CO Bypass active C XXXX Authorized representative in the European Community Manufacturer R ONLY 1009 0541 000 02 05 1 Introduction Volume alarms On Off touch key Menu touch key Bain Mapleson D breathing circuit module The primary regulator is set to pressure less than 414 kPa 60 psi CO Bypass Option Systems with this mark agree with the European Council Directive 93 42 EEC for Medical Devices when they are used as specified in their Operation and Maintenance Manuals The xxxx is the certification number of the Notified Body used by Datex Ohmeda s Quality Systems Caution federal law prohibits dispensing without prescription 1 9 Notes 1 10 02 05 1009 0541 000 In this section 1009 0541 000 02 05 2 Theory of Operation 2 1 Iheoty oVervIe Wirt e c endadset esau eaey eda ak cans 2 2 2 2 Gas flow through the anesthesia machine 0 ccc e cece tenes 2 2 2 23 OVEIWVIOW auis mene E kde REY RO EY Ge bos Dhaka Pe READ T alee 2 2 2 2 2 Physical connections aiseee e a RE EEEE II 2 6 2 2 3 SUCUOMMEBUIALOIS ieai
73. the adjustment knob on the ventilator s display and set the system switch to On a b Select and confirm Service Modes Follow the menu structure outline below to reach the adjustment forthe inspiratory flow valve Select and confirm at each step Diagnostics Tests Tools Display A D Channels Record the Inspiratory and Expiratory Flow actual values Note The Inspiratory and Expiratory Flow actual values should be near zero 5 Slowly increase the O flow to achieve 30 cm H50 The leak rate is equal to the flow needed to maintain 30 cm H50 e The leak rate should be less than 200 mL min 6 Observe the Inspiratory and Expiratory Flow actual values The values should be near zero as previously recorded in step 4 Note If one channel indicates flow see Inaccurate Volume Ventilation Troubleshooting in the 7100 Ventilator Service Manual 7 Release Pressure 1 21 Aespire 7900 Test10 Testing the circuit module and the canister 1 Remove the Flow Sensor module 2 Connect the Circuit Test Tool to the Circuit Module as shown above 3 Slowly increase the O flow to achieve 30cmH50 The leak rate is equal to the flow required to maintain 30 cmH30 e The leak rate should be less than 200 mL min Test 11 Testing the circuit module Plug Plug Plug Note If required set up the machine as in Test 10 1 Remove the Soda Lime Canister 2 Using appropriate Test Plugs plug the three ca
74. the knob so that the identification label is horizontal before tightening the setscrews 8 Tum on the O and the N50 gas supplies pipeline or cylinder 9 Setthe system switch to On 10 Adjust the needle valves 05 needle valve 200 10 mL min N50 needle valve 600 25 mL min 5 18 02 05 1009 0541 000 5 Calibration 11 Turn the sprocket on the O knob sprocket assembly counterclockwise until it stops against the tab on the O knob Do not allow the N50 or O valve stems to rotate Turn counter clockwise 12 Push the N50 sprocket against the plastic spacer 13 Holding the O knob rotate the N20 sprocket counterclockwise until all slack is removed from the chain 14 Lightly tighten both N20 sprocket setscrews 15 Turn the N50 needle valve clockwise to the minimum stop position 1009 0541 000 02 05 5 19 Aespire 7900 16 Install the N50 knob Turn the knob so that the identification label is 17 18 19 horizontal before tightening the setscrews Turn the N50 needle valve counterclockwise and check that the oxygen flow increases as N30 flow increases Turn the O needle valve clockwise and check that the N30 flow decreases as 0 decreases Check the proportioning system concentration increasing N20 flow Observe the following precautions e Start with both valves at the minimum setting Adjust only the N20 needle valve Increase the N50 flow as specified in the table bel
75. to On Set the controls s Ventilation Mode Volume control select from main menu e Ventilator Tidal Vol 400 ml Rate 12 E Ratio 1 2 Plimit 40 cm H50 PEEP OFF Anesthesia Machine 0 flow minimum flow Allother gases OFF ACGO selector switch to ABS Push Op Flush to fill the bellows Set the Bag Vent switch to Bag and back to Vent Make sure that a Mechanical ventilation starts b Asubatmospheric pressure alarm does not occur Note With active gas scavenging too much scavenging flow can cause subatmospheric alarm c The ventilator displays the correct data d The bellows inflate and deflate during mechanical ventilation Set the O flow control to 5 L min Make sure that a The end expiratory pressure is approximately O cm H30 Note Positive end expiratory pressure when PEEP is off may indicate that the scavenging system is not removing enough gas b The ventilator displays the correct data c The bellows inflate and deflate during mechanical ventilation Test the low minute volume alarm Go to the alarms menu Set the alarm limit for low minute volume to 6 0 L min Make sure that a low minute volume alarm occurs Go to the alarms menu papp Set the low minute volume alarm to OFF 02 05 1009 0541 000 3 Checkout Procedure 11 Test the high airway pressure alarm a b C Set Pi to less than the peak airway pressure Make sure that the high airway pressure
76. to remove or repair any circuit board Failure to do so may damage the internal electronics The circuit boards are electrostatic sensitive Use an anti static workstation and wear a wrist grounding strap when handling a circuit board To access the electrical enclosure components 1 Disconnect the power cord 2 Remove the lower electronic access panel Section 9 2 2 3 Disconnect the battery cable by pressing the lock tabs on either side of the connector and gently pulling on the connector 02 05 1009 0541 000 9 23 1 CPU Board A CAUTION 1009 0541 000 02 05 9 Repair Procedures The circuit boards are electrostatic sensitive Use an anti static workstation and wear a wrist grounding strap when handling a circuit board 1 2 Disconnect the four cable connectors from the bottom of the CPU board Disconnect the remaining cables the serial interface ribbon cable near the bottom of the board The cable goes to the DB 9 and DB 15 connectors on top of the electrical enclosure e the power supply cable at the right side of the CPU board e the task light harness Remove the hardware A at the upper left hand corner that holds the CPU bracket to the tab on the mounting plate Remove the five screws circled that hold the CPU board to the mounting plate of the electrical enclosure Lift and remove the board from the electrical enclosure Transfer the EEPROMs U14 and U23 from the old board to the new bo
77. to section 7 4 System Error Log s Refer to section 7 5 Alarm messages To help isolate a problem s Refer to section 7 7 Troubleshooting Flowcharts To locate specific test points Refer to section 7 8 Power supply test points If the ventilator experiences extreme electrical interference it may interrupt mechanical ventilation If this interruption occurs the ventilator generates an internal reset function and resumes normal operation after two 2 seconds For situations where continuous electrical interference is experienced by the ventilator causing a continuous interruption the ventilator s internal reset repeats until the interference ceases If the electrical interference is continuously present and mechanical ventilation is interrupted for approximately 30 seconds the ventilator produces a continuous beeping audio alarm Manual ventilation of the patient must be performed while the mechanical ventilation is interrupted When the electrical interference ceases the continuous beeping audio alarm can be silenced only by turning the ventilator or anesthesia machine as applicable power switch OFF and after five seconds back ON This system operates correctly at the electrical interference levels of IEC 601 1 2 Higher levels can cause nuisance alarms that may stop mechanical ventilation Manual ventilation must be performed when electrical interference causes interruption of ventilator delivered mechanical ventilation Ma
78. via a CRC check Cyclic Redundancy Check A CRC value has been calculated for the Flash ROM memory and this value is stored in the Flash ROM This test recalculates the CRC for the Flash ROM and compares it to the value stored in Flash ROM If the value that was calculated does not equal the value that was stored in Flash ROM the test will fail Finally the software tests all the external and display RAM memory with a walking bit pattern test It writes a certain bit pattern to a block of memory and then reads that block of memory If the bit pattern what it wrote is not the same bit pattern that it reads back the test fails When the test is complete and has passed the word Pass appears after the name of the test as in Figure 4 14 Test CPU and Memory Directions for Testing 1 Select Start Test to perform the test Test CPU Pass Test ROM Pass Test RAM Pass Test Display RAM Pass Go to Service Modes Menu Figure 4 14 Test CPU and Memory menu after all the tests have passed 4 14 02 05 1009 0541 000 4 Self Tests and Service Mode 4 3 6 Test EEPROM The software tests all the EEPROM memory via a bit pattern test It writes a certain pattern to a block of memory and then reads back that block of memory If the bit pattern that was written is not the same bit pattern that it reads back the test fails Test EEPROM Directions for Testing 1 Select Start Test to perform the test Go to Ser
79. you must disassemble the bellows base assembly to the bellows base latch _ point where you can remove the guide A and latch assembly B as a unit assembly 1 Remove the Bag Vent switch cartridge Section 9 17 1 2 Removethe two remaining screws C that hold the APL BTV manifold to the bellows base assembly Remove the APL BTV manifol 3 To remove the guide latch assembly remove two mounting screws D from the underside Remove two additional mounting screws from the topside Remove the amp uide latch assembly from the bellows base assembly 4 Separate the latch assembly from the guide assembly 5 Toinstall the new latch assembly putthe spring E into place in the guide assembly long leg down 6 Place the latch assembly on the guide assembly so that the latch engages the short leg of the spring Secure the latch assembly F to the guide assembly 7 Mountthe guide latch assembly into the bellows base assembly 8 Reassemble the breathing system in reverse order 9 Perform the checkout procedure Section 3 9 44 02 05 1009 0541 000 9 Repair Procedures 9 18 Replace casters A WARNING N CAUTION N CAUTION 1009 0541 000 02 05 Replacing a caster requires at least two people to maneuver and tip the machine Personal injury and or machine damage is possible if one person attempts this procedure alone 1 Disconnectall pipeline hoses from the wall and the machine close all gas cylinders un
80. 0 Common 275V Mode LL c U 9B 470V 2 15 GND GRN Y CHASSIS GROUND EQUIPOTENTIAL STUD CHASSIS GROUND Figure 11 8 Schematic AC Inlet module 220 240 V Isolated outlets 1009 0541 000 02 05 CONNECTOR Power Supply LINE FI LTER 5A FUSE AB 74 085 11 Schematics and Diagrams 11 9 Notes 11 10 02 05 1009 0541 000 Aespire 7900 Technical Reference Manual English 1009 0541 000 0205 A 01 0102 Printed in USA Datex Ohmeda Inc All rights reserved
81. 0 00 ccc cece cece nnan 9 10 9 8 Service the flowmeter module 0 00 cece cece nee eee eee m 9 12 9 8 1 Remove front flowmeter panel shield 0 0 cece eee eee eee eee 9 12 9 8 2 Remove flowtubes for cleaning or replacement cence eee ee 9 12 9 8 3 Remove complete flowmeter head 0 c ccc cece cece ee eeaee 9 14 9 8 4 Replace flowmeter modules ccc e cece eee eee eens 9 15 9 8 5 Replace flowmeter frame 0 cece een eee nee ene 9 19 9 8 6 Replace O supply switch 0 0 0 cee eee eee 9 20 9 8 7 Checkout procedure for O5 supply switch cece 9 20 9 8 8 Replace secondary regulator manifold or balance regulator manifold 9 21 9 8 9 Replace O or N50 needle valves on machines with N50 ss 9 22 9 8 10 Replace an Air needle valve on all machines or an Os needle valve on machines WItDIOUE N50 33s tis TEE na dtes e vas fase ie reo tube ek kad 9 24 9 9 Service vaporizer manifold parts sslisesssesesesesese 9 25 9 9 1 Repair manifold port valve cece eee eens 9 25 9 9 2 Checkout procedure for manifold port valve cece cece eee ees 9 26 9 9 3 Replace vaporizer manifold check valve 0c cece cece eee aee 9 27 9 9 4 Replace vaporizer pressure relief valve sese 9 29 9 9 5 Replace vaporizer manifold 0 c cece cece eee eens 9 30 9 1 Aespire 7900 9 2 9 10 Replace ACGO selector switch 0 00 ccc cece cece e
82. 0 000 1009 0541 000 02 05 10 3 Aespire 7900 10 1 3 Test Devices Item Tool Stock Number 1 Test flowmeter 6 50 L min Suction Flow Test 1006 8431 000 1 E Not Shown Low pressure Leak Test Device negative pressure Low pressure Leak Test Device positive pressure ISO Low pressure Leak Test Device positive pressure BSI Flow test device capable of measuring 0 15 L min with an accuracy of 2 of reading Vacuum test gauge capable of measuring 0 to 550 mm Hg with an accuracy of 1 of reading Test device capable of measuring 0 30 L min see Item 1 above Leakage current test device Test device capable of measuring 689 kPa 100 psi Low pressure test device digital manometer or test gauge with an accuracy of 2 of reading 10 1 4 Lubricants and Adhesives Item Description 1 Lubricant Krytox GPL 205 2 oz 2 Thread Lock Loctite No 24221 10 ml 10 4 0309 1319 800 1001 8976 000 1001 8975 000 Refer to section 6 5 Refer to section 6 6 Refer to section 6 6 Referto section 3 15 Referto section 5 1 Referto section 5 5 2 Stock Number 1001 3854 000 0220 5017 300 02 05 1009 0541 000 10 1 5 Test Tools 1009 0541 000 02 05 Item 1 la 1b 1c 1d 1e 1f 2 3 4 Tool Leak Test Tool Kit ABS breathing system Test Tool bulkhead Plug tapered 27x12 mm Plug tapered 24x18 mm Test Tool circle module 2 each Plug service B S 11 mm 2 each Plug service BTV 18 mm 2 e
83. 06 1225 000 1006 1226 000 1006 1227 000 1006 3615 000 1006 3584 000 1006 3968 000 1006 1233 000 1006 1234 000 1006 1235 000 1006 3617 000 1006 3583 000 1006 3969 000 1006 1353 000 1006 8393 000 1006 8378 000 1006 8379 000 02 05 1009 0541 000 10 Illustrated Parts fs N zx qq d 4 pe e 11 5 12 Pa 1009 0541 000 02 05 10 25 Aespire 7900 10 16 2 Secondary regulator components Item Description Stock Number 1 Knob N50 Air without label 1006 3633 000 2 O Proportioning assembly 1006 8339 000 includes knob sprocket set screws without knob label 3 Set screw 0141 4227 105 4 O Proportioner chain 1006 3610 000 5 Sprocket N50 1006 3625 000 6 Spacer link system N50 needle valve 1006 5140 000 7 Valve needle 0 Air 1006 8346 000 Valve needle N50 has notch around valve body 1006 8345 000 8 O ring 10 1 ID 13 3 OD 9221 3010 116 9 O ring 0 250 inch ID 0 375 inch OD 0210 0687 300 10 Minimum stop collar all gases 1006 3632 000 11 Pressure switch O gt supply alarm 1006 3623 000 12 O ring 0 250 inch ID 0 375 inch OD 0210 0687 300 13 Screws M4x12 Pozidriv PAN 0140 6226 111 14 Plug pressure switch cavity 1006 3665 000 15 Screws M4x8 Pozidriv PAN 1006 3178 000 16 Fitting O pilot plug in elbow 1006 3533 000 17 Fitting Os pilot thread in elbow 1006 3663 000 18 Tubing 4 mm RH head 144 mm LH head 164 mm 1001 3060 000 10 26 02 05 100
84. 10 31 10 19 L APL Valve ge D Stak lea eee ed erue E ak E RR een 10 31 10 19 2 Bag VerntSWitell vx ousceizcee xt es ee ER ERA Rhet vraie oes 10 32 10 19 3 Absorbercanister lsssesssssseseee teadsid uida iia 10 33 10 19 4 Flow Sensor Module ssssssssseeeen KI 10 34 10 19 5 Breathing Circuit Module 10 35 10 19 6 Exhalation valve 0 cece cece ence ene 10 36 10 19 0 BelloWS sciet e ix repe SERO ERIS NE EET nee oo g 10 37 10 19 8 BellOW base xod recedet tenet ecrire Fa one at hee 10 38 10 19 9 Bag Arms osse temet salt eka ede DAE hax neat 10 39 10 20 Electrical enclosure lower parts 0 cece eee eee eens 10 40 10 21 Display MOdUle ttt ta siat tin acento ave diate a 10 42 10 21 1 Rear housing parts 10 42 10 21 2 Front housing parts 10 43 10 22 Vent Engine Housing lssssssssssssse In 10 44 10 23 Vent Englne iiec nn eR e vas eter Rr pak ta RC EE 10 45 10 23 1 Vent Engine under side 0 cece eects 10 46 10 24 Legris quick release fittings 00 0 icc teeta 10 47 10 25 Vent Drive and low pressure tubing 0 cece eee eee een eens 10 48 10 26 Tubing for use with Legris fittings 0 kee cette eee 10 50 10 27 Cables and harnesses eee ee RE px eR RE RES 10 52 10 28 Anesthetic Gas Scavenging System AGSS 0 0 cece eee eee 10 54 10 28 1 Passive AGSS erno ink nass be weve eats o repite Pind 10 54 10 28 2 Adjustable AGSS riiai ook xe e eria ipeR RE e 10 56 10 2
85. 1006 4028 000 1006 4027 000 Lubricate sparingly with Krytox 02 05 1009 0541 000 10 Illustrated Parts 10 15 Vaporizer manifold 3 4 AA 96 287 15 at d Item Description Stock Number Manifold assembly complete two position 1006 8355 000 Manifold assembly complete one position 1009 8065 000 1 O ring 0 687 inch ID 0 812 inch OD 0210 0544 300 2 Spring compression 1006 3736 000 3 Valve kit includes seal 1006 8373 000 4 Seal 1006 3690 000 5 O ring 14 3 mm ID 1102 3043 000 Package of 6 o rings 1102 3016 000 6 Nipple vaporizer port New Style 1006 4215 000 7 Screw M2 5 0 45x6 PAN Pozidriv SST 1006 3037 000 8 Spring Dzus 1102 3056 000 9 Seat check valve 1006 1352 000 10 O ring 27 1 OD 21 89 mm ID 1006 3866 000 11 Flapper 0211 1451 100 12 Housing assembly 1009 8477 000 13 Screw MA x 30 cap head 9211 0640 304 14 Valve relief 5 5 psi 7 16 20 THD 1006 4128 000 15 Flexible tubing 1 4 inch mixed gas 1001 3064 000 1009 0541 000 02 05 10 21 Aespire 7900 10 16 Flowmeter components 10 22 Item f i Single tube Flowhead Outlet 6 it h Hp 3 k k i 9 ha E af a 8 gt 7 1 Description Flowhead Module includes regulator 05 and N50 flowtube module flowtubes needle valve intermodule tube and associated o ring and label plate does not include labels link 25 or knobs order separately 0
86. 1009 0541 000 10 19 9 Bag Arms 3 9 10 11 Item Description 1 Bag Arm Assembly complete 2 Bag Arm Upper Assembly 2a Cover bag port housing Screw M3x20 Lockwasher M3 internal 2b Housing bag port 2c Lever lock release 2d Ring retaining 2e Nut M3 Nyloc 3 Bag Arm Lower Assembly 3a Pad Friction Material 3b Post 3c Pin spirol 3d Spring 3e Washer shoulder 3f Nut M5 Nyloc 4 Pin dowel 3 18 DIA 31 8 L SST 5 Screw M3x16 POSI DR PAN HD A4 SST 6 Lockwasher M3 internal 7 Bag arm connector reusable Items if no Bag Arm 8 Clip patient tubing 9 Washer shoulder 10 Lockwasher M4 external 11 Screw M4x16 Apply Loctite 242 1009 0541 000 02 05 10 Illustrated Parts Stock Number 1009 8159 000 1407 7011 000 1407 3807 000 0140 6719 103 9213 0430 003 1407 3806 000 1407 3808 000 1406 3577 000 0144 3536 112 1407 7012 000 1407 3818 000 1407 3802 000 9214 2103 020 1406 3270 000 1407 3815 000 9212 0350 006 1407 3804 000 1504 3003 000 9213 0430 003 8004459 1407 3810 000 1407 3814 000 9213 0540 003 9211 0440 163 Qty 10 39 Aespire 7900 10 20 Electrical enclosure lower parts 10 40 Item 3a Description PCB CPU integrated Service without EPROMS EPROM Kit U14 and U23 Aespire 7900 Battery pack Fuse battery 4A 5x20 time delay Power supply Service Harness line filter to power supply Harness power supply to CPU Ribbon cable CPU to DB15 and DB9 Har
87. 144 2436 109 1407 3309 000 1407 3310 000 1006 3865 000 9213 0530 003 1407 3333 000 1407 3314 000 1407 3320 000 1406 3446 000 1407 3318 000 1009 5586 000 1406 3277 000 1406 3296 000 1009 3153 000 1407 3319 000 1407 3325 000 1407 3324 000 1006 3865 000 9213 0530 003 1407 3139 000 1407 3141 000 1407 3140 000 1007 3329 000 10 11 12 14 15 Qty aan NO N aS Ss aan N N 02 05 1009 0541 000 10 Illustrated Parts 10 19 Breathing System 10 19 1 APL Valve 20 21 16 17 14 7 AB 82 008 11 12 Item Description Stock Number QTY 1 APL Valve Assy includes items 2 through 6 1009 8200 000 2 SPRING CPRSN 53 14 OD 36 8 L 1 48 N MM 1406 3328 000 3 RETAINER SPRING APL 1407 3404 000 4 DIAPHRAGM APL 1406 3331 000 5 CAGE APL 1406 3333 000 6 POPPET APL VALVE 1406 3332 000 7 RAMP APL 1407 3400 000 8 COVER APL 1407 3405 000 9 MANIFOLD APL BTV 1407 3401 000 10 Cover Manifold APL BTV with 22 mm male bag port 1407 3402 000 Cover Manifold APL BTV with Australian bag port 22 mm female 1407 3412 000 10 COVER MANIFOLD APL BTV 1407 3402 000 11 WEIGHT DEAD 14CM H20 BCG ABS NEG RELIEF 1407 3406 000 12 SEAL ABS NEG RELIEF VLV 1407 3407 000 13 O RING 22 ID 30 OD 4 W SI 40 DURO 1407 3104 000 14 O RING 88 49 ID 95 55 OD 3 53 W SILICONE 50 DURO 1407 3403 000 15 O RING 1 049ID 1 2550D 0 103W EPDM NO 121 1407 3408 000 16 SCR M4X16 BT SKT HD SST TYPE 316 0140 6226 115 2 17 Lockw
88. 29 1 Major Components Continuous and Venturi suction 10 60 10 29 2 Suction Control Module 0 cee eee eae 10 61 10 29 3 Venturi assembly sss orom a eee nh 10 62 10 30 Auxiliary Op Flowmeter liess 10 63 10 31 Serial and task light cable AGSS flowtube and sample return 10 64 10 32 Display MOUNTS zs ases tree me ee E ert utes EN Ra UE ege gies 10 65 10 32 t Long ambi oro er eee aaa eripi E 10 65 10 32 2 Folding MOUNT e isss ir secet eR RR ER RE ns 10 66 10 33 Cable managementarm sssssssseee ee 10 67 10 34 Display arm mounting kits for optional equipment ssssssesese 10 68 11 Schematics and Diagrams 02 05 1009 0541 000 In this section 1009 0541 000 02 05 1 Introduction This section provides a general overview of the Aespire 7900 anesthesia machine 1 1 Whatthis manual includes sssssseseee teens 1 2 1 2 Standard service procedures 00 ccc cece eee 1 2 1 2 1 User s Reference Manuals cece eee ete eee e 1 2 12 2 SOTWAIE VEISIONS ses ascidian trata ee asp tesa alee aleve RARI ela a Rela aid ke a 1 2 1 2 3 Ventilatortests aie edie seis epe ha Rr nea adr ree em WEG pe 1 2 1 3Whatisan Aespire 7900 ac das cada Ve e Exe ay RR tan EPETPRUA 1 3 1 4 Configuration options ssssssssssseser In 1 3 1 4 1 Standard configuration 0 cece eee teen eens 1 3 HAZ OptlOllS cure Rer Ep Meanie ed hia ces ERE Rene wed D
89. 3 14 1 Place the shroud over the knob and Ensure that the indicators on the While holding the knob assembly While continuing to force the guide the assembly into the pan opening shroud align with label on the pan and the alignment tab mates with the alignment hole in the pan steady against the pan place the valve assembly over the knob actuator Using moderate force press the two assemblies together The knob should rotate to the ACGO position Actuator assemblies together rotate the knob assembly to the ABS position The assemblies should snap into place Verify proper alignment of the knob with the setting indicators Tighten the mounting screws evenly to secure the switch assembly to the pan Secure the outlet tubing with tie wraps Connect the fresh gas and flush gas tubing Pull on the tubing to ensure that it is locked in the fitting Reconnect the wires to the ACGO mode microswitch at the back of the valve top two terminals Reconnect the wires to the flush pressure switch at the top of the valve upper and lower terminals Replace the tabletop Confirm that flush flow and 5 L min fresh gas flow are diverted to the ACGO port and the ABS in the respective knob positions Confirm that the ventilator display indicates ACGO mode when the valve is set in the ACGO position Test the function of the flush pressure switch Service Mode Display Discrete 1 0 Signals
90. 4x10 self tapping 12 Tubing low pressure 250 mm 1 4 inch 13 Plate blank if no Auxiliary 05 Apply Loctite 242 Apply Teflon tape 10 Illustrated Parts Stock Number 1006 8424 000 1006 3841 000 1011 3471 000 9211 0830 053 1006 5177 000 1009 3243 000 0144 3132 140 0204 887 7 300 0204 8788 300 1006 8423 000 1009 3126 000 0140 6631 107 1009 5534 000 1605 1001 000 1009 3128 000 10 63 Aespire 7900 10 31 Serial and task light cable AGSS flowtube and sample return 10 64 Description Cable serial Integrated CPU to side panel Standoff Lockwasher Harness Integrated CPU to task light harness Label flow indicator AGSS Label flow indicator AGFS for German variant Label blank for machines without flow indicator Flowtube AGSS Clip AGSS flowtube Coupling Colder Kit includes mounting nut Label set blank for machines without scavenging Label AGFS for German variant Stock Number 1009 6072 000 1202 3092 000 0144 1104 331 1009 6076 000 1406 3527 000 1009 3301 000 1009 3241 000 1406 3560 000 1009 3181 000 1009 8321 000 1009 3351 000 1009 3300 000 02 05 1009 0541 000 10 32 Display mounts 10 32 1 Long arm 1009 0541 000 02 05 10 Illustrated Parts Item Description 1 GCX Arm Kit long 2 Spacer 3 GCX Bracket Kit includes display mount 3a cable guard 3b and mounting hardware 4 Cable Integrated CP
91. 5 Verify output voltages of power supply Replace CPU board 6 Membrane switch LED 6 Replace membrane keyboard No battery 1 Battery cable disconnected 1 Connect cable 2 Battery power less than 7V while running on battery power 3 Battery fuse blown 4 Defective battery 2 Charge battery 3 Replace battery fuse 4 Replace battery Alarms display but not audible 1 Audio set too low 2 Speaker cable 3 Speaker 4 CPU board 1 Adjust audio from menu 2 Ensure cable is plugged in 3 Replace speaker 4 Replace CPU board Bellows does not expand ortends to collapse during ventilation 1 Leak in the breathing circuit 2 Bellows not installed properly 3 Tear or leak in bellows 4 Insufficient fresh gas flow 5 Improperly functioning pressure relief valve in bellows assembly 1 Check breathing circuit and absorber for leaks 2 Check the bellows to rim attachment Make sure bellows ring roll is into groove under rim 3 Check the entire surface of the bellows Pay close attention to the angles in the convolutions 4 Check that settings on flowmeters are adequate 5 Check the pressure relief valve and seal for damage Reseat Bellows distended and or slips off base 1 Bellows retention problem 2 Bellows assembly exhaust restricted 3 Bellows assembly pressure relief valve problem 1 Check replace bellows 2 Check the waste gas scavenging system for high vacuum or bloc
92. 5 Language The text shown in the normal mode of operation is language sensitive However the majority of service confirmation and calibration modes are shown in English The other language choices are shown in specific language text with the exception of Japanese which is shown in English e Dutch Nederlands English English e French Frangais s German Deutsch e talian Italiano e Japanese Japanese e Polish Polski Portuguese Portugu s s Spanish Espa ol System Configuration Altitude Drive Gas Espa ol Heliox Mode Portugu s Ye Alarm Limits Polski Fran ais Optimal Screen Contrast Deutsch Italiano Mederlands Japanese Go to Service Modes Menu Figure 4 9 Language menu item 4 3 4 6 Optimal Screen The Screen Contrast menu is used to select the display brightness The values Contrast rangefrom 1 to 10 with 10 having the most screen contrast System Configuration Altitude 300 m Drive Gas Oz Heliox Mode Off Ye Alarm Limits Automatic Language English Optimal Screen Contrast 5 Go to Service Modes Menu Figure 4 10 Optimal Screen Contrast menu item 1009 0541 000 02 05 4 11 Aespire 7900 4 3 4 User Select Defaults The User Select Defaults menu determines the control settings used by the system at power up Settings related to optional ventilation modes will only appear in the User Select Defaults if the optional modes are
93. 6 1 LE Hal JE ET g 23 A Cylinder Supplies B Pneumatic Manifold C Flowmeter Head D Vaporizer Manifold E ACGO Select Switch Figure 2 1 Pneumatic circuit 1009 0541 000 02 05 2 5 Aespire 7900 Figure 2 2 shows the physical path that the gas takes 2 2 2 Physical connections 02 wi Vent Drive Figure 2 2 Typical tubing connections pictorial 02 05 1009 0541 000 2 6 2 Theory of Operation 2 2 3 Suction regulators Pipeline vacuum The suction regulator shown in Figure 2 2 uses an external vacuum source Venturi Drive vacuum The suction regulator shown in Figure 2 3 uses an internal venturi derived vacuum source Drive gas internally plumbed Air or 05 enters the Venturi Module VM at the drive port A As the drive gas passes through the venturi module a vacuum is created at port B The drive gas exits the venturi module at port C and is exhausted outside the machine through the muffler D The control port E on the venturi module responds to pneumatic signals from the front panel switch on the Suction Control Module SCM to turn the venturi vacuum drive gas on or off The check valve CV helps prevent pressurization of the suction circuitry if the exhaust is occluded or the venturi unit fails Venturi Drive Gas Air or 05 Suction Figure 2 3 Venturi suction 1009 0541 000 02 05 2 7 Aespire 7900 2 2 4 System switch The system s
94. 8 3 ActiVe AGS S ioco orenian E va ere eate Ace nu Recent 10 58 10 29 Integrated Suction Regulator ssseeseeeseeseeee 10 60 10 29 1 Major Components Continuous and Venturi suction 10 60 10 29 2 Suction Control Module sss 10 61 10 29 3 Venturi assembly mii prutar cee eed nm ca Ra y eR Y 10 62 10 30 Auxiliary 05 Flowmeter nenita cece cence I 10 63 10 31 Serial and task light cable AGSS flowtube and sample return 10 64 10 32 Display MOUNTS s s yevaicRu e iru EXE RR eee eee ove aes Sakae 10 65 10 32 LONE AIM aoo en ton he ae a ah pla E DUE ghee edes t 10 65 10 32 2 Folding mount curet RR ad vee ng eh ee ied eee ae 10 66 10 33 Cable management arm sssssssseeee 10 67 10 34 Display arm mounting kits for optional equipment cee eee eee 10 68 10 2 02 05 1009 0541 000 10 Illustrated Parts 10 1 Service tools 10 1 1 Software Item Description Stock Number U14 U23 Aespire 7900 Rev 4 6 Basic 1009 8435 000 Aespire 7900 Rev 4 6 PSVPro 1009 8437 000 10 1 2 Secondary Assemble the secondary regulator pilot pressure tool using a 4 mm tee and regulator pilot pressure tubing as shown This tool is used with N50 needle valve calibration tool 2 3 Item Description Stock Number 1 Tee 4 mm tube tube tube 1202 3653 000 2 Tubing 4 mm approximately 450 mm 18 inches 1001 3060 000 3 Tubing 4 mm approximately 50 mm 2 inches 1001 306
95. 9 0541 000 10 Illustrated Parts AB 74 102 1009 0541 000 02 05 10 27 Aespire 7900 10 17 ABS to machine Interface Components 14 15 16 Tex Ez 10 28 12 10 11 m Description Enhanced Sensor Interface board ESIB Cables and harnesses Screw M4x8 POZI DR PAN SST TYPE 316 0 Flush Valve ACGO Selector Valve Tie wrap Port ACGO body Screw M3x6 Screw M4x30 Lockwasher M4 Cap ACGO check valve Screw M4x8 Disk ACGO check valve Flapper ACGO check valve O ring Fitting elbow barbed O ring Cable raceway Plate cable raceway Gasket cable raceway plate self adhesive Lubricate sparingly with Krytox Stock Number 1503 7014 000 Refer to section 10 27 1006 3178 000 Refer to section 10 17 1 Refer to section 10 17 1 0203 5915 300 1009 3096 000 9211 1030 055 9211 0640 304 9213 0540 003 1009 3095 000 9211 1040 069 1009 3062 000 1009 3097 000 0210 0543 300 1009 3160 000 0210 0691 300 1009 3442 000 1009 3417 000 1009 3418 000 02 05 1009 0541 000 10 17 1 Flush Valve and ACGO Selector Switch 9a 9b 11 12 9c 1009 0541 000 02 05 Item m e Oo ON DO FP UMNI 9a 9b 9c 10 11 12 Description Flush valve without button Flush Button with rod Spring E clip Bracket Screw M4x8 Screw M4x12 Lockwasher M4 ACGO Selector Switch complete for machines without a Flush Regulator withou
96. Aespire 7900 Anesthesia Machine Technical Reference Manual Aespire 7900 Datex Ohmeda products have unit serial numbers with coded logic which indicates a product group code the year of manufacture and a sequential unit number for identification The serial number can be in one of two formats AAAX11111 AAAXX111111AA The X represents an alpha character indicating the year the product was manufactured H 2004 J 2005 etc land O are not used The XX represents a number indicating the yearthe product was manufactured 04 2004 05 2005 etc Aespire SmartVent and Link 25 are registered trademarks of Datex Ohmeda Inc Other brand names or product names used in this manual are trademarks or registered trademarks of their respective holders 02 05 1009 0541 000 Technical Reference Manual Aespire 7900 anesthesia machine This document is not to be reproduced in any manner nor are the contents to be disclosed to anyone without the express authorization of the product service department Datex Ohmeda Ohmeda Drive PO Box 7550 Madison Wisconsin 53707 5005 Datex Ohmeda Inc 1009 0541 000 02 05 Aespire 7900 Important A CAUTION The information contained in this service manual pertains only to those models of products which are marketed by Datex Ohmeda as of the effective date of this manual or the latest revision thereof This service manual was prepared for exclusive us
97. Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board Alarm Message footnotes 1 2 3 4 5 6 7 8 9 These alarms will de escalate to low priority following user acknowledgment by pressing the alarm silence switch These alarms also have associated text displayed in the user messages window These alarm messages do not have an elapsed time indication This alarm is enunciated at the maximum volume level and is not silenceable All minimum system shutdown alarms have high priority audio characteristics Ifthe user presses the alarm silence key the high priority audio is silenced for 120 seconds e If the shutdown condition occurs during non mechanical ventilation with the Bag Vent switch in Vent or during mechanical ventilation and the user moves the Bag Vent switch to Bag the high priority audio is silenced for 120 seconds Ifthe Bag Vent switch is moved from Bag to Vent while a shutdown condition is active and the audio silenced the high priority audio is generated once again The software will try to cause a reset of the processor after the user presses the control wheel in response to the shutdown message All minimum system monitoring alarms have medium priority audio characteristics All messages appear in the user messages window Flow sensors are also used to measure pressures 10 The sustained pressure threshold is calculated from the pressure limit setting When
98. EI DI D El 6 2 2 Every twenty four 1009 0541 000 02 05 24 months L1 L1 6 Installation and Maintenance 3 From the Service Mode menu perform the following Error Log Section 4 3 2 If any error codes have been logged follow the appropriate troubleshooting procedures Clearthe error log Display Discrete 1 0 Signals Section 4 3 14 Verify proper operation of all switches Adjust Drive Gas Regulator Section 4 3 18 s Test Gas Inlet Valve Section 4 3 7 s Test Flow Valve Section 4 3 8 Test Pressure Limit Switch Section 4 3 9 s Calibrate Pressure Sensitivity Section 4 3 21 e Calibrate Flow Valve Section 4 3 22 s Calibrate Bleed Resistor Section 4 3 23 Inspectthe system Section 3 2 Pipeline and cylindertests Section 3 3 Flow control Section 3 4 Pressure relief tests Section 3 5 O supply alarm test Section 3 6 C ON Oo OC A Flush flow test Section 3 7 10 Vaporizer back pressure test Section 3 8 11 Low pressure leak test Section 3 9 12 Airway pressure gauge accuracy check Section 5 5 2 13 Alarm tests Section 3 10 14 Breathing systems tests Section 3 11 15 Auxiliary Oz flowmeter tests if equipped with option Section 6 5 16 Integrated suction regulator tests if equipped with option Section 6 6 17 Power failure test Section 3 14 18 Electrical safety tests Section 3 15 In addition to the 12 month requirements replace the following part
99. Every twenty four 24 months 0 eee eee 6 5 6 3 Free breathing valve maintenance cece cece eee eae 6 6 6 4 MOPV pressure relief valve test 2 0 0 cece eee ene eect HH 6 7 6 41 Test setup teri ones rhe eter eee ee ice Rc atl ender cating 6 7 6 2 2 Test procedure is cosa yan indde LERRA Dt E E ah ond tags whe EE FAI ede 6 7 6 5 Auxiliary O2 flowmeter tests 0 00 cece cece tenet II 6 8 6 6 Integrated Suction Regulator tests 0 cece eect eee eens 6 9 7 Troubleshooting 7 1 General Troubleshooting T 2 7 2 Breathing System Leak Test Guide cece eect een eens 7 4 7 2 1 Breathing system leak test 0 eee ees 7 5 7 2 2 Breathing System Troubleshooting Flowcharts 0 eee ee eee eee eee 1 7 7 2 3 Leak Isolation TestS aiea par e a aa aE EE Ta Ea 7 12 7 3 Ventilator Troubleshooting instructions 2 0 cece eee tees 7 27 FA System Error log isse a ela wed eed ER I api ds Deeb vad 7 28 1 5 Alarmimmessages zo nee e nee eta d Ge Gece ak gea i D OR MIE e eaa ra 7 29 7 6 Mechanical electrical troubleshooting guide 00 c cece eee eee eee eee 7 42 02 05 1009 0541 000 1009 0541 000 02 05 Table of Contents 7 7 Troubleshooting Flowcharts cc cece eect eee 7 44 7 7 1 Ventilator assessment process 1 1 eee ene eee eens 7 44 7 7 2 No display troubleshooting 00 cc cece eee eens 7 45 7 7 3 Inaccurate volume ventilation troubleshooting cece e
100. I RE er UE a S o Pen 4 3 4 2 Service Mode Confirmation menu sssssssssssses e 4 4 4 3 Main Menu Service Mode ccc cece eee Inn 4 5 4 31 AlAIM LOS ior EIER EU eaa REX CE PLC Men Y ned 4 6 43 2 Error LOE eoo teo Girdle SA here a ae Pur are Paderb 4 7 4 3 3 System Configuration 2 ccc tent nents 4 8 4 3 4 UserSelect Defaults sporcie ta ose tr RR RE RR vC ER hE 4 12 4 3 5 Test CPU and Memory isses menn 4 14 4 3 6 Test EEPROM rnt Fa pete oer ted a e t E HERR 4 15 AS f Test GlV rox cese ne a Damned ni eh 06 aR P REDE VE Uneven 4 16 4 3 8 Test How Valve tiers cae LI XW xe cx A ee a SERERE 4 17 4 3 9 Test Drive Pressure Limit Switch 0 0 cece eee 4 18 4 3 10 Test 5V Fail Alarm nei inmane eai n Ie 4 19 4 3 TT TestSerlalPoits 22 tuere aan eh ters re ertet ate eR RE acne wk 4 20 4 3 12 Breathing System Leak Test 0 cece e eee ee 4 21 4 3 13 Display A D Channels 0 00 cece eee een II 4 22 4 3 14 Display Discrete l O Signals 0 c cece eee eee eens 4 24 4 3 15 Display Battery Status 0 cece cece nett e eens 4 25 4 3 16 Test Panel Switches gt cv viaccccs eee eds ih dete RR Meecha Te ated EXE 4 26 4 3 17 Flow Valve Test TOO 0 cc eee cece eee nett eee eens 4 27 4 3 18 Adjust Drive Gas Regulator 0 cece cece eens 4 28 4 3 19 O2 Calibrations 2 0 ccc cece eee nee HH Hmmm 4 29 4 3 20 Calibrate Flow Sensors cece eee eee eens 4 30 4 3 21
101. N50 Note Adjusting the regulator pressure is not recommended It has little effect on proportioning If you have difficulty proportioning the system you may need to replace either or both needle valves 21 Tighten N20 sprocket setscrews 22 Set the system switch to Standby 23 Turn off the O and the N50 gas supplies 24 Check that all setscrews are tight 25 Adjust all needle valves to minimum stop position 26 Install flowmeter panel shield 1009 0541 000 02 05 5 21 Aespire 7900 5 5 Airway pressure gauge 5 5 1 Zero the pressure 1 gauge 9 Attach a patient circuit to the Breathing System Leave the patient end open Set the Bag Vent switch to Bag Adjust the APL valve to maximum Remove the lens from the pressure gauge Apply a slight pressure with your thumb and finger tips around the outer edge of the lens e Turn the lens counterclockwise to remove it Adjust the pressure gauge to zero Plug the patient circuit Press and release the O flush button to sweep the needle across the pressure gauge Remove the plug from the patient circuit to relieve the pressure in the circuit and recheck the zero setting of the pressure gauge If required repeat zero and span procedure 10 Replace the lens cover 5 22 Zero Adjust 02 05 1009 0541 000 5 Calibration 5 5 2 Checking the The accuracy of the airway pressure gauge can be checked by using the pressur
102. Replace the bag Support arm nett 9 36 9 14 1 Servicing the bag support arm 1 1 eens 9 37 9 14 2 Replace friction pad in lower bag arm assembly 00ee eee 9 38 9 14 3 Replace bag port housing 0 cece cece teen eens 9 39 9 15 Replace auxiliary O flowmeter 0 0 0 ccc cece teens 9 40 9 16 Replace the suction control module 00 cece cece nnn 9 41 9 16 1 Front panel method 0 cece cece eee a a e eee a 9 41 9 16 2 Rearpanel method p issi ornai cece eee eee eee e 9 42 9 17 Replace ABS breathing system components 0 c cece ee cence eens 9 43 9 17 1 Replace Bag Vent switch assembly 00 cee eee eee eee eee 9 43 9 17 2 Replace bellows base latch assembly 2 00 c cee eee eee eee 9 44 9 18 Replace casters oec desees Sow uie ead bad CA YII Sane 9 45 9 19 Replace task light and switch ssssssessseee net eens 9 46 9 19 1 To replace the task light switch 0 0c cece eect eee 9 46 9 19 2 To replace the task light circuit board 2 1 kee eee 9 46 9 20 Replace the display cable long arm 0 c cece eee eee eee 9 47 9 20 1 Removing the display arm 0 cee eee eee eens 9 47 9 20 2 Replacing a display cable cece eee eect eee eens 9 47 9 20 3 Installing the long arm 0 eee eens 9 48 9 21 Replace the display cable folding mount 0 00 e cece eee eee eee eee 9 49 9 21 1 Removing the folding mount 00 cece eect
103. Supply 1879 2217 11 02 to 13 Volts 0 to 24 Volts In Rev 3 4 software Range 10 00 to 12 73 Volts GIV Current Sense 2371 3884 143 7t0235 4 mA 0t0248 2 mA Off state reading is 0 to 259 counts Notes 1 These columns show the acceptable range where possible 2 TheA D count and displayed value shown for Airway Pressure Manifold Pressure Inspiratory Flow and Expiratory Flow are the zero pressure values These readings should be taken with the flow sensors disconnected by removing the circuit module 3 Thecount range and displayed value shown for GIV Current Sense is with the GIV turned on If the GIV is turned off the off count range is 0 to 259 Counts 1009 0541 000 02 05 4 23 Aespire 7900 4 3 14 Display Discrete 1 0 Signals The Discrete I O Signals menu displays discrete binary signals associated with machine switch positions There are several types of switches in the Aespire 7900 machine some switches are mechanically operated Some switches are pneumatically operated some switches are electronic Display Discrete VO Signals Signal Status Signal Status ACGO Switch Oz Flush or COz Bypass Bag Vent Status Canister Status Control Panel Cover Oz Sensor Status Breathing Circuit SW Breathing Circuit SW2 Breathing Circuit Sw3 ot 1 Pressure Limit Status ot Oz Supply Pressure Go to Service Modes Menu Figure 4 24 Display Discrete I O Signals menu Mechanical switches Pneumatic
104. The bottom portion of the cartridge is defined asthe brass surface that is inserted in the lower spring Note Do not apply Krytox to the valve seal 6 Verify that the parts are free of dust and dirt T To reassemble perform the previous steps in reverse order 8 Complete the port valve checkout procedure described in the following section Section 9 9 2 1009 0541 000 02 05 9 25 Aespire 7900 9 9 2 Checkout procedure for manifold port valve Note N WARNING 9 26 Use the Vaporizer Manifold Valve Test Tool to perform the checkout procedure for the manifold port valve This tool and test procedure are intended for use only when the valve cartridge assembly is replaced This replacement and test procedure is a service action and is not part of the maintenance program 1 Setthe system switch to Standby 2 After replacing the valve cartridge assembly remove the vaporizer port o ring 3 Attach the valve tester to the top of the valve by sliding the bottom of the tester onto the o ring groove 4 Tighten the tester screw down onto the valve until the screw bottoms out on the top of the valve The tester o ring should create a seal with the top of the valve Remove the upper rear panel Section 9 2 Remove the inlet tube from the vaporizer manifold Setthe SCGO Selector switch to ACGO Test the negative low pressure leak test device Oo N O O a Put you hand on the inlet of the leak test device Push
105. Tm N 0 E JI U Ul sj a 1 A II Aespire 7900 10 27 Cables and harnesses 10 52 Item a A C N 10 11 12 13 14 15 16 17 18 19 20 21 Description Cable CPU Board to 7900 Vent display Cable CPU Board to machine switches Cable CPU Board to ESIB Cable CPU Board to Vent Engine connector plate Cable ESIB to ABS switches flow sensors includes tubing Harness O Cell harness to ESIB Harness ACGO switch to ESIB Harness O Cell to ESIB harness Harness Bag Vent ABS On switches Harness Vent Engine Board to Connector Plate Harness to System switch On Standby Power Cord Harness 100 120 V to Toroid Harness 220 240 V to Toroid Harness Line Filter to Power Power Supply Harness to 100 120 V outlets Harness to 220 240 V outlets Harness Task Light Harness CPU Board to Task Light harness Ribbon Cable CPU Board to DB25 and DB9 Harness Power Supply to CPU Board Cable Serial CPU Board to side panel Harness CO Bypass switch Stock Number 1006 3701 000 1009 6070 000 1006 3700 000 1006 3706 000 1009 8458 000 1009 6075 000 1009 6078 000 1009 5586 000 1009 6074 000 1009 6077 000 1009 5542 000 Referto section 10 11 1009 5752 000 1009 5753 000 1009 6125 000 1009 5716 000 1009 5717 000 1009 5584 000 1009 6076 000 1006 4260 000 1006 4261 000 1009 6072 000 1407 3144 000 02 05 1009 0541 000 10 I
106. U to 7900 Display 5 Extrusion upper dovetail 6 Screw M6x20 7 Lable blank 8 Cover 9 Washer rectangular 10 Screw M3x8 Apply Loctite 242 Stock Number 1009 3262 000 1009 8419 000 1009 3263 000 1006 3701 000 1009 3113 000 0144 2131 925 1009 3451 000 1006 1326 000 1006 4287 000 9211 0430 083 10 65 Aespire 7900 10 32 2 Folding mount 10 66 10 13 17 n k uri 6 9 8 Item Description 1 Dovetail insert 2 Screw M8x16 SKT HD 3 Screw M6x12 SKT HD 4 Extrusion Vent bracket mount 5 Bolt carriage 6 Casting Vent Bracket 20 degree 2 7 Bearing white plastic 2 8 Handle T clamping 9 Washer flat 10 Set screw M6x10 11 Screw M4x20 12 Lockwasher M4 13 Clamp 14 Cover 15 Washer rectangular 16 Screw M3x8 17 Cable Integrated CPU to 7900 Display Apply Loctite 242 Stock Number 1009 3408 000 1009 3435 000 0144 2436 101 1504 3514 000 1006 1433 000 1504 3526 000 1006 3228 000 1301 3001 000 9213 0180 006 1009 3436 000 0144 2124 218 0144 1118 128 1504 3527 000 1006 1326 000 1006 4287 000 9211 0430 083 1006 3701 000 02 05 1009 0541 000 10 33 Cable management arm 1009 0541 000 02 05 4 5 10 Illustrated Parts 7 2 3 8 Item o NO OC A C N e Description Cable management arm complete assembly Bracket cable management Screw M4x12 Lockwasher M4 external Extrusion cable arm front loading Screw M4x6 Nylo
107. UR UL amare tad 1 2 1 3 Whatisan Aespire 7900 cece een mn 1 3 1 4 Configuration options ssssssssssseserI n 1 3 1 4 1 Standard configuration sseesseesssesseeeee 1 3 14 2 ODUOIS coe DSi rx DE nucon de a EX CUIR UEUNS EP UL Sheed 1 3 1 5 System comporents 3 e sce IR eR MERE YA EE Ud eld de 1 4 1 6 Symbols used in the manual or onthe equipment 00 cece eee eee eee 1 7 2 Theory of Operation 2 1 Iheory ovelview 2 ev edly sche Mew IR eed xe e MER HR DRE a rt dace 2 2 2 2 Gas flow through the anesthesia machine 0 cece eee eee eee 2 2 2 2 1 OVelVIGW ieie E eu ene iut ace a OARE von ead ecd n Pa D eed date na IURE acd 2 2 2 2 2 Physical connections ssssssssssssesses I 2 6 2 2 3 SUCUON regulators 5 ieee te RD ere ya doce de En tesa WEG ca ie 2 7 2 2 4 System switch recense ebIOXG n vad wea ware Rx eb Rte RE x 2 8 2 2 5 FIOW CORItTOL 2o Lam coe led e t teen dl eb ER dee 2 9 ii Aespire 7900 2 3 Flow through the breathing system ccc cece eee eee nee eens 2 11 2 3 1 Overview of flow paths 0 cece cent e et ee eee ene 2 11 2 3 2 Manual ventilation 000 n nee eens 2 12 2 3 3 Mechanical ventilation 0 0 cee e eee eens 2 15 2 3 4 Fresh gas and Oy flush flow 0 cette eens 2 18 2 4 Aespire 7900 Ventilator 2 cece eee teens 2 20 XAT Features sees gins crue E ERueva vowed 34 PRX RR CPY S Ed CET4Sadenfus 2 20 2 4 2 Satety featules
108. a and China 220 240 VAC AS 3112 outlets EURO and France 220 VAC with CEE 7 7 India and South Africa 220 240 VAC BS546 Japan and US 100 120 VAC NEMA Peru 220 240 VAC NEMA Swiss 220 240 VAC SEV 1011 UK 220 240 VAC BS1363 Clamp power cord retainer Screw M4x8 Pozidriv Filter foam Retainer filter 10 Illustrated Parts Stock Number 1006 3888 000 1001 3380 000 1006 3885 000 1006 3907 000 1006 3889 000 1006 3889 000 1006 3884 000 1009 3103 000 0140 6226 113 1009 3064 000 1009 3058 000 10 15 Aespire 7900 10 12 AC Inlet Outlet Components 10 16 Item 10 11 12 13 14 15 Description Inlet 100 120 AC with line filter and 15 A circuit breaker Inlet 220 240 AC with line filter and 8 A circuit breaker Fuse 5A 5x20mm Fuse holder Circuit board Inrush 100 120V Circuit board Inrush 220 240V Filter AC Line 6VW1 100 240V Stud Equal Potential 6 mm Harness 100 120 V to Toroid Harness 220 240 V to Toroid Harness to 100 120 V outlets Harness to 220 240 V outlets Outlet Receptacle Australia AS 3112 Outlet Receptacle EURO CEE 7 7 Outlet Receptacle France CEE 7 4 Support Frame snap in Outlet Receptacle India and South Africa BS 546 Outlet Receptacle Japanese Outlet Receptacle NA Nema 5 15 Outlet Receptacle Swiss SEV 1011 Outlet Receptacle UK BS1363 Circuit Breaker 1A Rocker Circuit Breaker 2A Rocker Circuit Breaker 3A Rock
109. ach Plug stopper Adapter positive low pressure leak test Vaporizer Manifold Valve Test Tool Not Shown Tool to help disconnect tubing from Legris fittings Test Lung Leak detection fluid Snoop 10 Illustrated Parts Stock Number 1407 7013 000 1407 8500 000 1407 8505 000 1407 8506 000 1407 8502 000 1407 8504 000 1407 8503 000 2900 0001 000 1009 3119 000 1006 3967 000 2900 0000 000 0219 7210 300 obtain locally 10 5 Aespire 7900 10 2 External components front view 10 6 Oo Oo 10 01 FW ND PPP RP PRP Pb Noon fF WN KF CO 18 19 20 4 5 6 Description Caster 125 mm with brake front Caster 125 mm no brake rear Cover cable channel Upper shelf Bolt M6x40 Lockwasher M6 internal Gauge airway pressure includes mounting hardware Handle side Handle Medirail Screw M6x12 Sems Spacer Screw M6x70 Lockwasher M6 external Screw M6x20 Shim Task Light PCB Lens Task Light Screw Switch Assembly task light Plate switch mounting retainer Screw Label S 5 Aespire i NN AB 74 003 Stock Number 1006 3070 000 1006 3071 000 1009 3020 000 1009 3022 000 0144 2131 911 0144 1118 130 1009 3034 000 1009 3033 000 1009 3101 000 0144 2436 106 1009 3102 000 0144 2131 923 9213 0560 003 0144 2131 921 1009 3131 000 1009 5504 000 1011 3308 000 0142 4254 106 1009 5587 000 1009 3143 000 0140 6226 107 1009 3187 000 02 05 1009 0541 000 10 3 Externa
110. aia ks i E ex E E a a a 2 7 22A System SWItChl 5 weer aah aE e Ready erae hiang rhe be aka ange 2 8 2 2 5 Flow Gontrol uci ver eX ved re E eR SR eae a end 2 9 2 3 Flow through the breathing system lsssssssseee eee ens 2 11 2 3 1 Overview of flow paths 0 cece cee eee eee II 2 11 2 3 2 Manual ventilation 0 0 0 e eee nee eens 2 12 2 3 3 Mechanical ventilation cc cece eee eens 2 15 2 3 4 Fresh gas and Oy flush flow 0 cece eee eens 2 18 2 4 Aespire 7900 Ventilator 0 eects 2 20 24 T Features iicet eed Faw ites XX RE URERT E NARYRERTSEEREROROA KERES 2 20 2 4 2 Safety featules 5 cdi eoe e aA RAAN i terere ute s bd iacet d wo E Red CR 2 20 2 5 Aespire 7900 Ventilator components lsssssssssseses mm 2 21 2 5 1 Ventilator control electronics 2 22 2 5 2 Control panel and display 0 cies 2 23 2 5 3 Enhanced Sensor Interface Board ESIB 0 0 cece eee 2 24 2 5 4 Pneumatic Vent Engine 0 cece cece eee een ees 2 24 PET rr 2 25 2 06 1 Block diagram atr oet wc E ERE TX D RU E TOP 2 25 2 6 2 Powersupply ssssx erii e LR a Rx ex a 4X ER ERERRXRUNECEREAR 2 26 2 6 3 Sealed lead acid battery cece cece eee eee eee eens 2 27 2 6 4 CPU assembly 2r ded ened een iad Sowa rd Bae bed ha 2 28 2 6 5 Enhanced Sensor Interface Board ESIB 00 c cece eee eee eee 2 35 2 7 Ventilator mechanical subsystems 0c cece cee eee eee e eee eee 2 39 2 7 1 Dri
111. al bag port APL adjustable pressure limiting valve Bag Vent switch Bellows assembly Pressure gauge airway Sample gas return port Scavenging flow indicator RS 232 Serial port SON oa Pw Nr ad ha m m E p j PP Ono of WS IN Figure 1 1 Aespire 7900 anesthesia machine front view left side 1 4 02 05 1009 0541 000 v O 7 8 ABS Advanced Breathing System Flow controls Control Module Ventilator Display Dovetail rails Vaporizer System switch Pipeline pressure gauge s upper row Cylinder pressure gauge s lower row 0 Flush 10 Auxiliary 0 flowmeter 11 Suction regulator 22 So de to Io E Figure 1 2 Aespire 7900 anesthesia machine front view right side 1009 0541 000 02 05 1 Introduction 1 5 Aespire 7900 7 Circuit Breaker for Electrical Outlets Electrical Outlets Pipeline Connection s Cylinder Supplies System Circuit Breaker Mains Inlet Equipotential Stud Oar Nr Figure 1 3 Aespire 7900 anesthesia machine rear view 02 05 1009 0541 000 1 Introduction 1 6 Symbols used in the manual or on the equipment CEO O iF H A Warnings and A Cautions tell you about dangerous conditions that can occur if you do not follow all instructions in this manual Warnings tell about a condition that can cause injury to the operator or the patient Cautions tell about a condition that can cau
112. alarm occurs Set Pii to correct level 12 Testthe apnea and low airway pressure alarms QaQ T oO Turn all flow controls fully clockwise Remove the test lung from the patient connection Otheralarms such as low minute volume can occur Makesure thatthe low airway pressure and apnea alarms occur The apnea alarm occurs after 30 seconds 13 Testthe sustained airway pressure alarm a Set the controls APLvalve Closed 70 Bag Vent switch Bag Mechanical ventilation stops when the Bag Vent switch is set to Bag Occlude the bag port connector with a test plug Close the patient connection using the test plug located on the side of the ABS and push the O Flush button Make sure that the sustained pressure alarm occurs after approximately 15 seconds at the sustained pressure limit 6 30 cm H50 varies with pressure limit 14 Testthe O monitor and alarms zoa c 00009 j k l Remove the O sensor from the circuit module Make sure the sensor measures approximately 2196 O in room air Setthe low O5 alarm to 50 Make sure a low O alarm occurs Setthe low O alarm back to 2196 and make sure that alarm cancels Put the O sensor back in the circuit Remove the test lung from the patient connection Set the High O alarm to 50 Push the flush button to fill the breathing system Set the O flow control to 2 L min Make sure the high O alarm comes On Set the high O
113. alve AI in j e Dnm T m J C V ey TW AB 82 026 B Bag Vent switch to Bag FG Fresh Gas AP Airway Pressure 1 Flow to absorber 2 Flow from absorber 3 Inspiratory flow Figure 2 4 Gas flow during manual inspiration 2 12 02 05 1009 0541 000 Manual expiration Figure 2 5 AP Airway Pressure B Bag Vent switch to Bag FG Fresh Gas SGR Sample Gas Return 4 Expiratory flow 5 Flow to bag Figure 2 5 Flow during manual expiration 1009 0541 000 02 05 2 Theory of Operation The Bag Vent switch keeps the ventilator path closed B Gas flows from the patient 4 through a unidirectional valve expiratory check valve and into the bag 5 During exhalation fresh gas flows backwards through the absorber FG into the expiratory limb downstream of the expiratory check valve For machines that are plumbed to return sample gas to the breathing system the returned gas SGR enters the breathing system after the expiratory check valve Refer to section 9 12 AB 82 027 2 13 Aespire 7900 APLValve The APL valve sets a pressure limit for manual ventilation Figure 2 6 As you turn the APL knob it puts more or less force on the APL disc and seat D S If the circuit pressure is too high 6 the disc and seat inside the diaphragm opens and vents gas to the scavenging system 7
114. anister I lt D white C02 Bypass Line Filter Key to Symbols VEB Vent Engine Board ESIB Enhanced Sensor Interface Board ACGO Auxiliary Common Gas Outlet Figure 11 5 Wiring harnesses 11 6 02 05 1009 0541 000 Scavenging Downtube Vent Engine Vaporizer Manifold ni From Flowmeter Auxiliary 0 Flowmeter The Sample Gas Return is directed to the scavenging system as a factory default A qualified service representative can reroute the sample gas back to the breathing system Refer to Section 9 12 Figure 11 6 Tubing 1009 0541 000 02 05 Enhanced Sensor Interface Board From 02 Supply ae AB 74 072 W ase Seer Illu ee ee ee EE 11 Schematics and Diagrams Aespire 7900 OUTLET BREAKERS COUNTRY SPECIFIC OUTLETS NRUSH PCA 100 120V pe et ne i ISOLATION TRANSFORMER m 1 ACINLET MODULE 15A l FUSIBLE d i SYSTEM BREAKER 10 BLK l BRN s LINE IN 5w o LINE A i BRN yy e e oa 1 LNE OUT THERMAL FUSE o FILTER end 1 5KE250C 130 ROCKER D6521Z0V151RA20 m CONNECTOR AC INLET ane 10 JH1A W AC120V Q Differential PS ee as ee een ee equ Ll ns B THERMAL FUSE
115. ard See Section 9 23 2 Firmware replacement procedure for information on safely handling the EEPROMs Install the new board by following these instructions in reverse order Perform the CPU board tests found in Section 9 23 2 Perform the Checkout Procedure found in Section 3 9 55 Aespire 7900 9 23 2 Firmware replacement procedure A CAUTION CPU board tests 9 56 The circuit board and EEPROMs are electrostatic sensitive Use an approved static control workstation and wrist grounding strap 1 Place the CPU board on an approved static control workstation 2 Note the label and orientation of each EEPROM to ensure they are properly transferred to the replacement board 3 Use a PLCC chip extraction tool to remove the two EEPROMs U14 and U23 Insert the two prongs on the extractor tool into the slotted corners of the EEPROM socket 4 Install the new EEPROMs noting the label to ensure the correct chip is placed in the correct socket Align the EEPROM notch with the socket notch and press the chip down firmly Whenever you replace the CPU board and orthe EEPROMs U14 and U23 or perform the software upgrade perform the following tests e Select the altitude Section 4 3 3 1 Altitude e Select the drive gas Section 4 3 3 2 Drive Gas e Cal O Sensor Section 4 3 19 s Cal Flow Sensor Section 4 3 20 e Cal Pressure Sensitivity Section 4 3 21 s Cal Flow Valve Section 4 3 22 s Cal Bleed Resistor Secti
116. as the following unadjusted dc accuracy specifications Integral Nonlinearity 1 LSB max Differential Nonlinearity 1 LSB max guaranteed monotonic Full Scale Error 3 LSB max Unipolar Offset Error 2 LSB max Voltage reference The MAX191BCWG has an internal 4 096 Volt 1 mV voltage reference that can be adjusted with a potentiometer This reference voltage is buffered and used for the digital to analog converter reference 02 05 1009 0541 000 Flow valve control Gas inlet valve drive 1009 054 1 000 circuit 2 Theory of Operation The flow valve control circuit consists of a D A converter and a voltage to current conversion circuit D A conversion The D A conversion for the flow valve drive circuit is based around the MAX530 12 Bit DAC The output of the DAC is fed to an input of the A D converter multiplexer allowing the microprocessor to monitor the DAC output The MAX530 operates from the same 5V power supply as the A D converter The output voltage range of the converter is 0 to 4 095V 1mV per LSB The MAX530BCWG has the following dc accuracy specifications Integral Nonlinearity 1 LSB max Differential Nonlinearity 1 LSB max guaranteed monotonic Full Scale Error 1 LSB max Zero Scale Error 4 LSB max Flow valve drive circuit The flow valve drive circuit does a voltage to current conversion of the DAC output voltage signal FLW_DAC With a 0 to 4 000 Volt
117. asher M4 external 9213 0540 003 2 18 SCR THUMB M4 SHLDR 7 5 X 7 1407 3410 000 3 19 RING RETAINING 3 96 SFT DIA CRESCENT SST 1407 3411 000 3 20 SCR M4 X 40 FLHD SST PH 0140 6226 122 2 21 O RING 2 9 ID 6 46 OD 1 78 W EP 70 DURO 1407 3409 000 2 22 SCR SEMS M4X8 BT SKT HD W EXT L W SST 316 0144 2436 108 3 1009 0541 000 02 05 10 31 Aespire 7900 10 19 2 Bag Vent Switch 10 32 Item BW N e AB 82 022 Description BTV Switch Cartridge COVER BTV SCR SEMS M4X8 BT SKT HD W EXT L W SST 316 O RING 44 02 ID 51 1 OD 3 53 W SI 70 DURO SEAL BTV Stock Number QTY 1407 7003 000 1407 3500 000 0144 2436 108 2 1407 3507 000 1407 3506 000 02 05 1009 0541 000 10 Illustrated Parts 10 19 3 Absorber canister AB 82 017 Item Description Stock Number Absorber Canister Reusable 1407 7004 000 1 Canister CO 1407 3200 000 2 O RING 110 72 ID 117 78 OD 3 53 W EPR 50 DURO 1407 3204 000 3 Foam CO Canister PKG 40 1407 3201 000 4 Cover assembly CO canister 1009 8240 000 1009 0541 000 02 05 10 33 Aespire 7900 10 19 4 Flow Sensor Module Item Description Stock Number Qty Flow Sensor Module does not include Item 1 1407 7001 000 1 Flow Sensor plastic 1503 3856 000 Flow Sensor metal autoclavable 1503 3244 000 2 COVER FLOW SNSR 1407 3000 000 3 HOLDER FLOW SNSR UPPER 1407 3002 000 4 HOLDER FLOW SNSR LOWER 1407 3003 000 5 SCR THUMB M6X43 SST 1406 3304 000 6 SCR MA X 10 SKT CAP BUTTON HEAD SST
118. assemblies and loosen the O stop collar setscrews Remove the flowmeter panel shield Section 9 8 1 Disconnect the tube from the pilot port on the N20 regulator N20 pilot port Disconnect tube 5 Disconnect the 4 mm outlet tube from the back of the N50 pipeline manifold Connect to N30 pilot port E DS SC j E m iis E Connect 4 mm outlet tube E Using a 4 mm tube tee fixture see Service Tools Section 10 1 2 connecta tube tee end to the N20 supply outlet at the back ofthe pipeline manifold Connect the outlet tube to the open connection on the tee connector of the fixture Connect the other end of the fixture to the N20 pilot port at the front of the flowhead This setup supplies pilot pressure to the N50 balancing regulator during the minimum stop calibration 02 05 1009 0541 000 5 Calibration 7 Slide a stop collar onto the valve stem with the stop tab toward the valve Do not tighten setscrews Stop a ge EN Valve Stem 8 Connect either an N50 pipeline or cylinder supply Valve Stop Tab 9 Slowly open the N50 cylinder valve Important Do not connect the O pipeline or open the O cylinder valve 10 Adjust the needle valve until the float is nearly touching the filter but not quite Flowtube Float AC a Filter 11 Disconnectthe tubing from the inlet of the vaporizer manifold closest to flowhead 12 Ifthe machine has an Air option bleed do
119. at each click of the encoder knob results in an increment for the counterclockwise or clockwise totals Clockwise Totals 0 Counterclockwise Totals 0 Test Encoder Knob Turn Go to Service Modes Menu 02 05 1009 0541 000 4 Self Tests and Service Mode 4 3 17 Flow Valve Test The Flow Valve Test Tool is available for test and troubleshooting purposes Tool only It allows you to manually control the flow valve setting from O closed to 120 LPM in 1 LPM increments and observe key pressure and flow measurements on the same screen This is mainly used to test the drive gas circuit and MOPV valves as detailed in the MOPV test procedure Section 6 4 However it can also be used for other troubleshooting procedures whenever a set flow is required Directions for verification 1 Refer to Service Manual for a description of the various tests 2 Set Bag Vent switch to Vent 3 Select Set Flow Valve 4 Adjust flow using rotary encoder switch Ainway Pressure 0 64 cm H20 Manifold Pressure 0 04 cm H20 Inspiratory Flow 0 00 L min Expiratory Flow 0 02 L min Set Flow 0 L min Go to Service Modes Menu Figure 4 27 Flow Valve Test Tool menu Note The flow does not turn off automatically The flow must be set to zero to stop flow Flow will originally be setto zero upon entering this screen 1009 0541 000 02 05 4 21 Aespire 7900 4 3 18 Adjust Drive Gas Regulator The Adjust Drive Gas Regulator procedure establishes
120. ating minimum flow for N50 a Close the cylinder valve and use the needle valve to bleed the remaining gas b Remove the test fixture connecting the N20 gas supply to pressure balance regulator pilot port c Reconnectthe pilottube to the N50 pilot port Pull on the tubing to ensure it is locked into the fitting Connect d Reconnect the outlet tube to the N20 pipeline supply manifold 24 Calibrate the Link proportioning system Section 5 4 1009 0541 000 02 05 5 13 Aespire 7900 5 3 3 Air Needle Valve Calibration Minimum Flow A CAUTION Do not force the needle valve against the seat Overtightening the valve can cause the minimum flow setting to drift out of specifications 1 Set the system switch to Standby 2 Disconnect all pipeline hoses and close all cylinder valves except for air 3 Remove the flowmeter panel shield Section 9 8 1 4 Remove the upper rear panel Note If adjusting an existing needle valve e remove the Air knob e and loosen the Air stop collar setscrews 5 Slide a stop collaronto the valve stem with the stop tab toward the valve Do not tighten setscrews Stop a P di m Valve Stem 6 Setthe system switch to On Valve Stop Tab T Adjust the needle valve until the float is nearly touching the filter but not quite Flowtube Fiat AL Filter 8 Disconnect the tubing from the inlet to the vaporizer manifold left end of manifold 9 Apply asmall amount of leak
121. bes only Measured 0 21 minimum 0 5 dual flowtubes only 21 minimum 0 8 21 to 30 1 0 21 to 30 2 0 21 to 30 6 0 21 to 30 9 0 21 to 30 10 Check the proportioning system concentration decreasing O flow Observe the following precautions a b C Start with N50 valve atthe maximum setting Adjust only the O flow control Decrease the O flow as specified in the table and make sure the 05 concentration is in the allowed range Note Allow the 05 monitor to stabilize At the lower flows the 05 monitor may take up to 90 seconds to stabilize Ifyou overshoot a setting turn the N50 flow control counterclockwise until the O flow increases to the previous setting before continuing the test Set the 0 flow L min Measured 05 3 0 21 to 30 2 0 21 to 30 1 0 21 to 30 0 3 21 to 30 11 Check the linearity of the Air flow control Turn the N30 flow control fully clockwise to minimum stop Set the 0 flow Set the Air flow L min 0 monitor range L min 4 0 3 0 61 to 71 3 5 6 0 45 to 55 1 5 8 0 28 to 38 1009 0541 000 02 05 3 5 Aespire 7900 3 5 Pressure relief test To check the pressure relief valve vaporizer manifold outlet 1 2 3 3 6 0 supply alarm test 3 6 Turn all flow controls fully clockwise minimum flow Set the ACGO selector switch to ACGO Connect a gauge o
122. ble over a range of 248 to 495 to accommodate variations in pressure transducer span The instrumentation amplifier also provides an offset adjustment that is used to set the zero pressure output to 2 05 VDC nominal The offset reference is adjustable over a range of 1 614 to 2 495 VDC to accommodate variation in the pressure transducer zero offset A RC lag filter on the output of the pressure transducer amplifier slows the response of the pressure transducers to make the Enhanced SIB backwards compatible with previous versions of the SIB A buffer amplifier follows the lag filter to provide a low impedance driver for the cable going to the CPU Board 2 37 Aespire 7900 2 38 Manifold and Patient Airway Pressure Measurement The precision 4 096 volt reference is used to supply a reference voltage to the instrumentation amplifier s reference pin and to supply input power to the pressure transducer The output voltage of the pressure transducer changes proportionally to the applied pressure The instrumentation amplifier has a nominal gain of 286 The instrumentation amplifier gain is adjustable over a range of 199 to 330 to accommodate variations in pressure transducer span It s nominal zero pressure output voltage is 800mV which is the voltage applied to its reference pin The pressure range is 20 cm H50 to 120 cm H50 At 20 cm H50 the amplifiers output voltage is nominally 300mV and at 120 cm H50 its output is nominally 3800mV The amplifi
123. c Retainer multiple cable Retainer cable small Washer M4 flat Stock Number 1009 8181 000 1009 3261 000 0140 6226 111 9213 0540 003 1009 3247 000 1009 3283 000 1009 3252 000 1009 3259 000 0144 1025 165 10 67 Aespire 7900 10 34 Display arm mounting kits for optional equipment 10 68 Description Cardiocap 5 mount S 5 Flat Panel mount Spacelabs Flat Panel mount Spacelabs PC Scout mount Stock Number 1009 3265 000 1009 3266 000 1009 3267 000 1009 3268 000 02 05 1009 0541 000 In this section Figure 11 1 Figure 11 2 Figure 11 3 Figure 11 4 Figure 11 5 Figure 11 6 Figure 11 7 Figure 11 8 1009 0541 000 02 05 Schematics are subject to change without notice Circuit boards are available only as complete assemblies System connection block diagram 0 cece eee eee eee eee nee eee 11 2 Gas scavenging circuits ei sester ee nee ete 11 3 Electrical cabling block diagram 0 0 cece eee eee eens 11 4 Pneumatic circuit diagram 1 een ene nee 11 5 Wiring hatmesses is ue ner rt bo tore n me esd n rper tang n nl LEUR teh te 11 6 TUDIN so ecco 11 7 Schematic AC Inlet module 100 120 V Isolated outlets cc eee eee eee 11 8 Schematic AC Inlet module 220 240 V Isolated outlets naana 11 9 11 Schematics and Diagrams Aux O2 a O2 Flush gt Vent Engine 0 10 LPM KH lt opt ie 0 120 LPM Flo
124. cell If there is still a calibration problem replace the ESIB board High Paw high In range Py data Paw gt Plimit Check Pressure limit setting is not set too low 2 available for ventilator settings and breathing circuit Alarm condition becomes false for 15 seconds or Check the breathing circuit for occlusions until the end of the next full inspiratory cycle Perform flow sensor calibration Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board High VE medium In range flow data VE gt high limit Check ventilator settings and volume output available and alarm Check the breathing circuit and flow sensor limit not off connections Alarm condition becomes false or volume alarms Perform flow sensor calibration state transition to standby or off Replace the flow sensors Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board High VTE medium In range flow data VrE gt high limit Check ventilator settings and volume output available and alarm Check the breathing circuit and flow sensor limit not off connections Alarm condition becomes false or volume alarms Perform flow sensor calibration state transition to standby or off Replace the flow sensors Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board Insp Flow User Alarm The system cannotread Operation continues Replace the flow sensor Sensor Fail the calibration data with default values stored in the
125. clockwise to increase the force and counterclockwise to reduce the force e Swing the bag arm sideways through the 90 degree arc permitted by its internal stop Adjust to just enough friction to prevent the bag arm from swinging sideways as the bag height is being changed The bag arm height is changed by squeezing the lock release lever C at the free end of the bag arm and rotating it to the desired position Replace the ABS breathing system 02 05 1009 0541 000 9 Repair Procedures 9 14 1 Servicing Service parts for the bag support arm include the upper and lower assemblies the bag support 1 replace either assembly 2m 1 Remove the bag support arm from the machine Section 9 14 2 Toseparate the upper assembly j from the lower assembly use a small 2 5 mm pin punch from the bottom to drive the dowel pin up and E out 3 To assemble the bag arm apply a light coat of Krytox to the area of the I upper arm A that extends into the lower arm including the dowel pin groove c Groove 4 Insertthe upper assembly into the lower assembly Align the surface B of the upper assembly with the surface C of the lower assembly 5 Insert the dowel pin into the hole from the top side as shown Drive the dowel pin into the bag arm until itis flush with the top surface 1 y 1 E S 1009 0541 000 02 05 9 37 Aespire 7900 9 38 9 14 2 Replace friction pad in lower bag arm
126. compensate for compression losses fresh gas contribution valve and regulator drift and small leakages in the breathing absorber bellows and system s Positive End Expiratory Pressure PEEP is regulated electronically During mechanical ventilation the software maintains the set airway pressure PEEP is not active when mechanical ventilation is off User settings and microprocessor calculations control breathing patterns User interface settings are kept in non volatile memory e Mechanical ventilation is started with the Bag Vent switch on the breathing system e Ventilator hardware is regularly monitored by software tests An RS 232 serial digital communications port connects to and communicates with external devices An exhalation valve modulates flow in the pressure mode Pressure and volume modes are selectable by the operator All pneumatic components are located on one manifold e Exhausted drive gas and bellows pressure relief valve gases are mixed and go through the ventilator exhalation valve Exhalation valve block is autoclavable Excess fresh gas released from the bellows and ventilator drive gas is transferred from the exhalation valve to the Anesthesia Gas Scavenging System AGSS Optimized for service with a low number of components Airway overpressure protection linked to Pmax setting Dual redundant software independent airway overpressure devices Volume over delivery limits and p
127. ctive Perform each of the calibrations Settings starting with the upper most selection ONLY select Set Service Calibration A if you know what you are doing Drive Gas Oz Calibrations Calibrate Flow Sensors Pressure Sensitivity Calibrate Flow Valve Bleed Resistor Calibration Set Service Calibration A Go to Service Modes Menu Figure 4 37 Service Calibration full menu 1009 0541 000 02 05 4 35 Notes 4 36 02 05 1009 0541 000 N WARNING In this section 1009 0541 000 02 05 5 Calibration After adjustments and calibration are completed always perform the checkout procedure Refer to Section 3 of this manual This section covers calibration procedures for components of the Aespire anesthesia machine 5 1 Primary Regulators 0 cca cae cess irrena cee ended need ee deemed ean 5 2 bl T TeStUSEUUD sedo ek Bechet Re TIMENS ge NAA 5 2 5 1 2 Testing Primary Regulators 0 ccc eee eens 5 2 5 1 3 Adjusting Primary Regulators 0 00 cece cece 5 6 5 2 Secondary Regulators issiedicwee nena tees EX e REY ete ones GaGa 5 7 5 2 1 Testing Adjusting Secondary Regulators or Balance Regulators 5 7 5 3 Flowmeter Needle Valve Calibration 00 c cece cece eee III 5 8 5 3 1 0 Needle Valve Calibration Minimum Flow sisse eee ee eee 5 8 5 3 2 N50 Needle Valve Calibration Minimum Flow 5 10 5 3 3 Air Needle Valve Calibration Minimum Flow sasaaa 5 14 5 4 Link system calib
128. d O knobs 20 Replace the flowmeter panel shield and the rear panel 5 16 02 05 1009 0541 000 5 Calibration 5 4 Link system calibration A WARNING 1009 0541 000 02 05 Before you start make sure that All parts are correctly installed Stops on needle valves are set correctly e The machine meets leak check requirements Confirm thatthe O5 sensor measures 21 in room air and 100 in pure Oo If not calibrate the O sensor Note All illustrations in this section show ANSI flowmeter module positions The order is reversed on ISO machines You must be in a well ventilated room or use a gas evacuation device at this time Anesthetic vapors exhausted into the room air can be harmful to your health 1 Setthe system switch to Standby 2 Remove the flowmeter panel shield Section 9 8 1 3 Put the plastic spacer on the N50 needle valve spindle 4 Turn the O and the N50 needle valves clockwise to their minimum stop position Spacer es 5 Put the chain onto the O knob sprocket assembly and the N50 sprocket Note The N50 sprocket set screws should be away from the valve 5 17 Aespire 7900 6 Install the chain and sprockets onto the needle valve stems as an assembly Press the O knob sprocket against the O5 minimum stop collar Sprocket Chain Assembly T Tighten the setscrews in the O knob Do not tighten the N20 sprocket setscrews Note If O label is on the knob turn
129. device to the black inline connector that is in the Exhalation Valve interface cuff tubing SIB side Apply 104 5 4 cm H50 76 5 3 8 2 9 mm Hg to activate the switch Verify status change on the 1 0 signal screen On If problem continues replace SIB 02 05 1009 0541 000 4 3 10 Test 5V Fail Alarm Figure 4 19 Test 5V Fail Alarm menu 1009 0541 000 02 05 4 Self Tests and Service Mode A 5 Volt supply VDD is used to power the digital circuits throughout the ventilator The 5 Volt supply VDD is derived in the power section of the control board It is used to power the digital circuits throughout the ventilator If the 5 Volt supply fails the ventilator will sound a continuous alarm tone when the system switch is turned on To test the 5V Fail Alarm follow the directions on the screen If the alarm tone does not sound replace the CPU board Section 9 23 1 Test 5V Fail Alarm Directions for Test SV Fail Alarm 1 Select Test 5V Fail Alarm to start the test 2 Verify that 5V Fail Alarm tone sounds for about 2 seconds Go to Service Modes Menu 4 19 Aespire 7900 4 3 11 Test Serial Ports Two serial port tests may be done Public Port Test Com 2 requires pins 6 and 13 of the external serial connector located on the left side of the machine to be jumpered A Proprietary Port Test Com 1 requires pins 2 and 3 of the internal download serial connector located above t
130. diately following use of O Flush Flush is used e Flush switch Mode Section 4 3 14 Press and release flush button Look for proper switch action 2 Check wire harness connections at switch and ESIB 3 Replace CPU board 1009 0541 000 02 05 1 43 Aespire 7900 7 7 Troubleshooting Flowcharts 7 1 1 Ventilator assessment process Review Active Alarms Error Log and Alarm Log Start Turn on System Is Display w orking Proceed Yes to No Display Troubleshooting Section 7 7 2 AB 29 092 Are Diagnosis achieved there d Use Alarm Troubleshooting Yes Section 7 5 Yes No No ALARMS SYMPTOMS Proceed to Alarms of Type Breathing System Leak Bellows falls or leak Patient Circuit Leak Troubleshooting detected System Leak No Alarms of Type Vt Compensation Off Delivered Volume Mismatch Proceed to Check Flow Sensors Inaccurate Volume EP Insp Reverse Flow Ventilation Inaccurate ventilation Exp Reverse Flow Troubleshooting System Leak Section 7 7 3 Unable to drive Bellows No i n cre Volume Apnea o Ventilation Will not Low Drive Gas amp Troubleshooting ventilate Pressure System Section 7 7 4 Leak No Proceed to Alarms of Type High Intrinsic PEEP Continuously high PEEP Sustained Paw Troubleshooting during operation High Paw Section 7 7 5 Referto Section 7 2 Breathing System Leak Test Guide 1 44 02 05 1009 0541 000 7 7 2 No display troubl
131. display On Battery Power OK 6 Connectthe power cable again 7 Make sure the alarm cancels 3 15 Electrical safety tests 1009 0541 000 02 05 Make sure the system is completely assembled and all accessory devices are connected to electrical outlets 1 Connect an approved test device e g UL CSA or AAMI and verify that the leakage current is less than Voltage Max Leakage Current 120 100 Vac 300 uAmps 220 240 Vac 500 uAmps 2 Make sure that the resistance to ground is less than 0 2 2 between an exposed metal surface and the ground pin on the power cord Notes 3 18 02 05 1009 0541 000 A WARNING In this section 1009 0541 000 02 05 4 Self Tests and Service Mode Post Service Checkout is required after you complete this section You must perform Section 3 1 Post service checkoutafter performing any maintenance service or repair Failure to do so may result in patient injury To ensure proper operation the Aespire 7900 Ventilator includes several tests that run automatically self tests and a series of menu pages that a qualified service person can use to test calibrate or troubleshoot ventilator related components in the Aespire machine Service Mode Al Self tests ooo cro REPE WEE NI reed Sade REX ER AE AM E es 4 3 4 2 Service Mode Confirmation menu cece cece eee eee e 4 4 4 3 Main Menu Service Mode 0 cece eee en nee Inn 4 5 2 3 T Aat l Og 4n eese rae ene Ssh Sus
132. dules are connected at the bottom with a long screw A and nut B that is recessed To remove retain nut while loosening screw The flowmeter modules are held together at the top with a u clip To separate the modules pivot the modules front to back 45 degree The u clip will disengage and allow the modules to separate The flowmeter modules are interconnected at the top by a spacer tube The o ring on the spacertube makes a leak tight seal f U Clip O ring Spacer Tube n Top of flowmeter module Aespire 7900 Single tube flowhead The outlet fitting for a single tube flowhead is not an integral component of the 05 flowmeter The outlet fitting is a separate componentthat includes an o ring seal and is held in place with two u clips Small l Large U Clip O ring Uco I 3 To remove the Air flowmeter module a Remove the screw located on the side of the Air flowmeter module b Hold the flowmeter module with the flowtubes facing you c Grasp the outer modules at the bottom of the regulator manifold and push the left module away from you until the u clip pops off and the module separates from the other assemblies d Pull the modules sideways to separate them at the top Save the u clip spacer tube and the o ring for reassembly 4 To remove the 05 or N50 flowmeter module a Setthe O and N20 needle valves to their maximum position counterclockwise b Loosen the set screws on t
133. e 5 Counts value is between 1914 and 2262 If not in range Refer to section 5 6 3 measure the 15 V supply on CPU board at TP1 referenced to ground at TP207 14 25 to 15 75 volts If this voltage is in range replace the CPU board because the problem is in the A D channel If not in range remove the ESIB to CPU cable and re test If in range the ESIB to CPU cable or ESIB may be shorting the 12 V ESIB supply and loading the 15 V supply If still not in range replace the CPU 15V Analog Minimum Voltage Replace the CPU board Out of Shutdown out of range Range 5 12 HourTest UserAlarm System in use for more than 12 hours without a power up self test To do the test move the system switch from Standby to On Absorber User Alarm ABS not completely If persists check panel open engaged ABSON switch Push the breathing system into the frame and harness to ESIB ensure it latches ESIB cable from ESIB to CPU board A D Minimum Ventilator malfunction Ventilate manually Replace Converter Shutdown Monitoring is not a CPU board Failure 5 reliable 1009 0541 000 02 05 1 29 Aespire 7900 Message Alarm type Enabling Criteria Alarm Condition Service Repair Priority Removal Criteria AdjustLow UserAlarm The audible circuit leak Ve Limit alarm is Off Alarm menu but the low VE alarm limit is not set within 50 of measured Ve Ve alarm limit is Off in SIMV or PSVPro modes
134. e Valve Disposal System I 30 mm Male Assembly with i Connector I DISS EVAC i Connector i I i I I I 3 Reservoir I Reservoir Reservoir l l 1 Flow Indicator Is Passive Adjustable Active See Note Key to Symbols X Plugged port 1 8 inch for sample gas return Plugged port 30 mm for auxiliary breathing system scavenging O Open port 30 mm for auxiliary breathing system scavenging Oto 10 l min drive gas 0 to 10 min patient and fresh gas O to 20 l min total typical flow Note Active AGSS systems with a 12 7 mm connector do not include the Flow Orifice and the Flow Indicator Figure 11 2 Gas scavenging circuits 1009 0541 000 02 05 11 3 Aespire 7900 Control Module Ventilator Display Upper Chassis EL Display Fes AC Power Membrane Switches Task Outlets Connector Board m Optical Encoder Speaker 05 Supply Switch RS232 l l 68340 Microcontroller Memory and 1 0 Decoding Flash SRAM and EEPROM SCR Circuitry D A Converter Watchdog System Inlet Valve Control and Drive 4 EL voltage 10 14 5V 10 5W max 12V light output 15W max 15V 170mA max Inspiratory and Expiratory flow transducers Expiratory Drive Pressure Limit Switch Flow Sensor Bulkhead Manifold Pressure Transducer Connector Patient Airway Pressure Inspiratory Transducer Flow Sensor I E p ACGO AC Inlet 0 Circuit Breaker and 2 A
135. e by Datex Ohmeda service personnel in light of their training and experience as well as the availability to them of parts proper tools and test equipment Consequently Datex Ohmeda provides this service manual to its customers purely as a business convenience and for the customer s general information only without warranty of the results with respect to any application of such information Furthermore because of the wide variety of circumstances under which maintenance and repair activities may be performed and the unique nature of each individual s own experience capacity and qualifications the fact that customer has received such information from Datex Ohmeda does not imply in anyway that Datex Ohmeda deems said individual to be qualified to perform any such maintenance or repair service Moreover it should not be assumed that every acceptable test and safety procedure or method precaution tool equipment or device is referred to within or that abnormal or unusual circumstances may not warrant or suggest different or additional procedures or requirements This manual is subject to periodic review update and revision Customers are cautioned to obtain and consult the latest revision before undertaking any service of the equipment Comments and suggestions on this manual are invited from our customers Send your comments and suggestions to the Manager of Technical Communications Datex Ohmeda Ohmeda Drive PO Box 7550 Madison Wisconsin 53707
136. e ee ene 9 47 9 20 3 Installing the long arm 0 eee eens 9 48 9 21 Replace the display cable folding mount 0 00 e cece eee eee eee 9 49 9 21 1 Removing the folding mount 00 c cece eee eee 9 49 9 21 2 Replacing a display cable 0c cece eee eee e eee eee eens 9 49 9 21 3 Installing the folding Mount 0 cece eects 9 50 9 22 Aespire 7900 Control Display module cee eee eee eee 9 51 9 23 Electrical enclosure components 0 cece cece eee ee ees 9 54 9 23 4 Battery stessi pex ns aa esi lavas EE RR Bok ate 9 58 923 5 Replace CPU cables cui tet RERO RR bead ENE 9 59 9 24 Servicing the Vent Engine ssssssssssssseer eens 9 60 9 24 1 To remove the Vent Engine cece cece eects 9 61 9 24 2 Replacing Vent Engine components 00 e cece eee eee eee eee 9 62 9 24 3 Replacing GIV components ccc cece eee eee eee ene 9 63 02 05 1009 0541 000 A WARNING AN 9 Repair Procedures To prevent fires Use lubricants approved for anesthesia or O equipment such as Krytox e Donotuse lubricants that contain oil or grease they burn or explode in high O concentrations e All covers used on the system must be made from antistatic conductive materials Static electricity can cause fires Obey infection control and safety procedures Used equipment may contain blood and body fluids A movable part or a removable component may present a pinch
137. e gauge accuracy following a low pressure test device digital manometer or test gauge with an accuracy of 2 of reading a low pressure supply source typically a syringe and an airway pressure gauge test adapter 1 To Test Device To Low pressure Source Syringe 1009 0541 000 02 05 Ensure that the pressure gauge is zeroed Section 5 5 1 Remove the upper rear panel Removethe existingtube from the back ofthe pressure gauge and connect the test adapter tube directly to the gauge Connect a low pressure supply source syringe to one of the open tubes of the test adapter Connecta low pressure test device to the remaining open tube of the test adapter Adjustthe pressure source to the following pressures as read on the airway pressure gauge The test device gauge should read within the values indicated Airway Pressure Gauge Test Device 0 cm H50 0 1cm H50 40 cm H50 40 2 cm H50 5 cm H20 5 2 cm H20 To Pressure Gauge Fitting 5 23 Notes 5 24 02 05 1009 0541 000 In this section A WARNINGS 1009 0541 000 02 05 6 Installation and Maintenance 6 1 Aespire 7900 Installation Checklist 0 0 lisse 6 2 6 2 Aespire 7900 Planned Maintenance cece eee eens 6 4 6 2 1 Every twelve 12 months 20 cece eect e ees 6 4 6 2 2 Every twenty four 24 months 00 c eee cee eee eee eee ees 6 5 6 3 Free br
138. e high pressure fitting as detailed in Section 9 6 1 e Pull on the cylinder output fitting to ensure it is locked in place BEFORE you install the rear panel Adjust if necessary Section 5 1 Perform the checkout procedure Section 3 02 05 1009 0541 000 9 6 3 Replace cylinder inlet filter A CAUTION 9 6 4 Replace cylinder check valve 1009 0541 000 02 05 9 Repair Procedures 1 Open the cylinder yokes 2 Remove the inlet adapter from the cylinder yoke using a 4 mm hex wrench Note A brass retaining ring keeps the filter inside the inlet adapter 3 Thread a 6 mm screw two turns only into the brass retaining ring and pull it out Be careful not to crush the filter Do not thread in the screw more than two full turns Remove the filter Install the new filter and brass retaining ring Install the inlet adapter in the cylinder yoke N Oo OC A Perform the checkout procedure Section 3 The cylinder check valve is not a replaceable item If the check valve is defective you must replace the complete cylinder supply module 9 9 Aespire 7900 9 7 Replace system switch assembly 1 Bleed all gas pressure from the machine Section 9 1 2 Ensure that all cylinder and pipeline gauges read zero before proceeding 3 Remove the tabletop Section 9 3 4 Remove the gauge panel mounting screws and move the panel forward to access the system switch System Switch electrical
139. e indicates a leak and requires service 5 Rotate the flow control clockwise to shut off the flow 3 13 Integrated Suction Regulator tests The gauge needle should come to rest within the zero range bracket when no suction is being supplied Gauges which do not comply may be out of calibration Adjust the regulator setting to minimum Tum the mode selector to On Ensurethe gauge remains less than 200 mmHg 26 kPa 0 26 Bar Occlude the inlet Ensure the gauge remains less than 200 mmHg 26 kPa 0 26 Bar Adjust the regulator in an increasing vacuum level NO oO FP C MN BE The gauge should rise after rotation has begun The gauge should rise with continued rotation of the regulator adjustment oo Adjust the regulator setting to minimum 9 Turn the Mode selector to O Off 3 16 02 05 1009 0541 000 3 14 Power failure test 3 Checkout Procedure 1 Connect the power cord to a mains outlet The mains indicator on the display comes on when AC Power is connected x4 E If the indicator is not on the display assembly is not receiving AC power Verify AC powerto the machine reset circuit breaker e Check fuses in display assembly s inlet module Check fuses in machine s AC inlet assembly Set the system switch to On Unplug the power cord with the system turned on Make sure that the power failure alarm comes on o m oO P Make sure the following message is on the ventilator
140. e located just below the top brass hex 13 14 0 needle valve has no groove N50 needle valve has a groove Install the stop collar on the new needle valve Do not tighten the set screws Perform the needle valve calibration Section 5 3 02 05 1009 0541 000 9 Repair Procedures 15 After calibrating the needle valve put the spacer the N50 needle valve spindle Spacer 16 Put the chain on the O5 knob sprocket assembly and the N50 sprocket 17 Install the chain and sprockets on the needle valve spindles as an assembly Do not tighten the set screws Sprocket Chain Assembly 18 Install the N50 knob Do not tighten the set screws 19 Perform the link system calibration Section 5 4 20 Install the flowmeter panel shield 21 Perform the checkout procedure Section 3 1009 0541 000 02 05 9 23 Aespire 7900 9 8 10 Replace an Air needle valve on all machines or an 0 needle valve on machines without N50 9 24 For machines with N50 refer to Section 9 8 9 for replacing the O needle valve Bleed all gas pressure from the machine Section 9 1 Ensure that all cylinder and pipeline gauges read zero before proceeding Remove the front flowmeter panel shield Section 9 8 1 Loosen the set screws on the flow control knob and remove the knob 1 2 3 4 5 Loosen the set screws on the stop collar and remove the collar 6 If equipped remove the maximum flow stop collar 7 Using a
141. e pliers disconnect the switch harness from the task light circuit board connector B Remove the two screws C that hold the switch retainer plate to the upper shelf Transferthe switch retainer plate to the new switch counter sunk side to the outside Mount the switch to the upper shelf Remountthe task light assembly Ensure that the switch harness and the task light harness wires are positioned in their respective recesses and are not pinched under the task light lens Using a small needle nose pliers disconnect the switch harness from the task light circuit board connector B disconnect the task light harness from the task light circuit board connector D Slide the task light circuit board out of the lens Slide the new task light into the lens ensuring that the connectors are aligned with the lens cutouts Plug the task light harness and the switch harness into their respective connectors on the task light circuit board Use a small screwdriver to push the connectors securely into place Remountthe task light assembly Ensure that the switch harness and the task light harness wires are positioned in their respective recesses and are not pinched under the task light lens 02 05 1009 0541 000 9 Repair Procedures 9 20 Replace the display cable long arm 9 20 1 Removing the display arm 9 20 2 Replacing a display cable 1009 0541 000 02 05 Display cable replacement requires that y
142. e protected against short circuits Input Nominally 13 7 VDC at 25 C during float charge Output 10V to 14 8VDC during discharge 2 27 Aespire 7900 2 6 4 CPU assembly FLASH MEM 512K X 16 The CPU assembly contains all of the major circuit functions necessary to control ventilator operation they are part of the digital circuits section ofthe integrated CPU board MC68340 MICROCONTROLLER STATIC RAM 128K X 16 Joj euuo uorjnpoJd 2KX8 VIDEO SRAM 32K X8 SED1351F VIDEO CONTROLLER FERRITE BEADS J019euuo5 O2eesu Aejeudoiq 4019euuot Oeeesu Mewud VHEL 45V AUDI EEPROM ds D8 D15 3 LM EPLD EPM7064 WATCHDOG Logic SEQUENCER VENTILATION CONTROL ADDRESS DECODING X sv 24 CHANNEL MUTIPLEXER MEUSE SATVA L3 TINI J0joeuuo5 12 BIT D A CONVERTER DIGITAL INPUT 1 euiDu3 oneuineug SAIC AAWA MO l4 YM2413 AUDIO CHIP FREQUENC DIVIDER AMP V SERIAL NTERFACE EEPROM SIB 12V 10VA LIMIT ANALOG SIGNALS Wav 1V SSO7 ASt A Front Panel Assembly Connector Op Supply O Flush Connector Connector Figure 2 19 Ventilator CPU block diagram Motorola 68340 processor core 2 28 The CPU core consists of the following inter
143. e regulator output pressure to 60 DIN 386 400 kPa 56 58 psi 50 Pin Indexed 327 341 kPa 47 5 49 5 psi Note It may be necessary to open the cylinder valve and repeat steps 4 and 5 a number of times to achieve the above setting 6 Testthe regulator settings per the appropriate test in Section 5 1 2 Test A For primary regulators that supply drive gas to the ventilator Test B For all gases not used to supply drive gas to the ventilator 5 6 02 05 1009 0541 000 5 Calibration 5 2 Secondary Regulators AX WARNING When testing N20 regulators nitrous oxide flows through the system Use a safe and approved procedure to collect and remove it 5 2 1 Testing Adjusting 1 Setthe system switch to Standby Secondary Regulators or 2 Remove the flowmeter panel shield Section 9 8 1 Balance Regulators 3 Remove the plug from the test port and connect a test device capable of measuring 689 kPa 100 psi using 1 8 inch nylon tubing Test Ports 4 Set the flow of the tested gas and of O as detailed in the chart 5 Verify that the output of the tested regulator is within the range listed in the chart Regulator Output Flow Flow Regulated gas 05 05 207 7 kPa 30 1 psi 2l min N50 14 kPa x2 psi of O reading 10 L min 4 L min 6 If required adjust the O regulator to meet the above specifications The N50 regulator is not adjustable replace if out of range Note The adjustment screw
144. e t Ee end te med RR ARS E aure wet 4 6 43 2 EIfOr LOB acids meer ER EE P ER eR br ERES Y MPO DC CROP ME tates 4 7 4 3 3 System Configuration 02 cece e eae 4 8 4 3 4 User Select Defaults 0 cece cent e eee m 4 12 4 3 5 Test CPU and Memory cece cece ene eee eens 4 14 4 3 0 TeSEEEPROM s oo ee eat adenan st pU duh bok Soe TY ated eed 4 15 ASA Test GIV et 4 16 4 3 8 Test Flow Valve i ssepe cere ran tad edad ne cane Pad xm wide 4 17 4 3 9 Test Drive Pressure Limit Switch 0 00 cece cece n eens 4 18 4 3 10 Test 5V Fail Alarm ccc reece eee Hmm hn 4 19 43 11 Test Serial Ports ois nen tantae vee Cae m vend tad eb age vhs baw ed ee 4 20 4 3 12 Breathing System Leak Test cc cece cece eens 4 21 4 3 13 Display A D Channels 000 c cece eee enae 4 22 4 3 14 Display Discrete l O Signals ccc cece eee eee eens 4 24 4 1 4 2 4 3 15 Display Battery Status 0 0 ccc cece cece e nn 4 25 4 3 16 Test Panel Switches z csi gee Ss qx ER ELE ae ee ee ee EXE 4 26 4 3 17 Flow Valve Test TOO 0 2 cc cece e e 4 27 4 3 18 Adjust Drive Gas Regulator 00 cece cece eee eee eee 4 28 4 3 19 02 Calibrations 2 0 i ccc eee Ih 4 29 4 3 20 Calibrate Flow Sensors cece cece eee een eens 4 30 4 3 21 Pressure Sensitivity 2 0 0 0 c cece cee ene 4 31 4 3 22 Calibrate Flow Valve 0 0 ieee IH 4 32 4 3 23 Bleed Resistor Calibration 0 cece cece eee eee e
145. e test device Turn all flow controls fully clockwise minimum flow Do not over tighten Agent mixtures from the low pressure leak test stay in the system Always flush the system with O after the low pressure leak test 1 L min for one minute Turn off all vaporizers at the end of the low pressure leak test 9 Flush the system with O a 2ap p Set the system switch to On Set the O flow to 1 L min Continue the O flow for one minute Turn the O flow control fully clockwise minimum flow Setthe system switch to Standby 3 9 Aespire 7900 3 9 2 ISO or BSI standard low pressure leak test A CAUTION Dothe positive pressure leak test at the ACGO outlet only 1 Setthe ACGO selector switch to ACGO 2 Turn all flow controls fully clockwise minimum flow 3 Using the positive pressure leak test adapter connect the ISO or BSI specific leak test device to the ACGO outlet Push the adapter into the ACGO outlet throughout the test to get a good seal i Leak Test Adapter t Test Device Top View Test Device Front View Es 4 Keepflowmeter ofthe test device vertical for accurate results 5 Fully open the needle valve on the test device counterclockwise A CAUTION Ifthe needle valve is not fully open this test can damage the pressure gauge on the test device 6 Setthe system switch to On 3 10 02 05 1009 0541 000 3 Checkout P
146. ease the retainer with the setting indicator facing forward housing Snap the spring and retainer onto the valve body from below Reinstall the ABS breathing system Perform the checkout procedure Section 3 9 35 Aespire 7900 9 14 Replace the bag support arm Note The adjustment nut is initially set so that 5 mm of exposed thread extends from the adjusting nut With use the force required to move the arm increases and may require readjustment 9 36 From the underside of the casting Install the new bag support arm Remove the ABS breathing system from the machine remove the two screws lockwashers A that hold the arm in place e f either of the pins see below remain in the casting remove them from the casting assembly Position the bag arm over mounting pattern of 4 small holes in the support casting The arm should extend towards the front of the machine Align the two pins B extending from the base of the bag arm assembly with two of the small holes in the casting that are in line with the APL valve Lower the bag arm pushing the two pins into the holes From the underside of the casting secure the bag arm with two M3x16 screws and lockwashers Testthe force required to swing the bag arm from side to side and adjust if necessary The force is adjusted by turning the lock nut 8 mm socket which is accessible from underneath the support casting Turn
147. eathing valve maintenance cc cece 6 6 6 4 MOPV pressure relief valve test 0 ccc ccc cece eee eee IRI 6 7 6 4 T Testset p ise yews Se dae DER aa ee ee REESE PERPE 6 7 0 4 2 Test DroCe dle eor IL ERI eec D eei Y Aa E a n 6 7 6 5 Auxiliary O2 flowmeter tests sssssssssssese IRI 6 8 6 6 Integrated Suction Regulator tests sssessssssesesee een eae 6 9 Do not perform testing or maintenance on the Aespire Anesthesia Machine while itis being used on a patient Possible injury can result Items can be contaminated due to infectious patients Wear sterile rubber gloves Contamination can spread to you and others Obey infection control and safety procedures Used equipment may contain blood and body fluids 6 1 Aespire 7900 6 1 Aespire 7900 Installation Checklist Serial Number Date YY MM DD Hospital Performed by O 1 Unpack and assemble the Aespire 7900 System O 2 Reconfigure the sample gas return line as required Section 9 12 3 Enter the Service Mode and select System Configuration from the menu Section 4 3 3 Perform the following steps 1 a Enterthe site altitude in increments of 100 meters O b Select the correct ventilator drive gas O or Air O c Make sure Heliox Mode is setto Off Aespire 7900 machines cannot be configured to deliver Heliox O d Select the desired Vc Alarm Limits Automatic or User Adjustable 1 e Change the language s
148. ecco 1 3 1 5 System COMPONENS sci eo dene eed ta e Rr ate RARE RUE UM SE han 1 4 1 6 Symbols used in the manual or onthe equipment cece eee eee eee 1 7 1 1 Aespire 7900 1 1 What this manual includes Other equipment This manual covers the service information for the Aespire anesthesia machine with 7900 Ventilator It covers the following components Aespire 7900 Ventilator components s Gas delivery components e Breathing system components Frame component s Optional suction regulator e Optional auxiliary O flowmeter Other equipment may be attached to the system on the display mount the top shelf or on the side dovetail rails Consult separate documentation relative to these items for details 1 2 Standard service procedures 1 2 1 User s Reference Manuals 1 2 2 Software versions 1 2 3 Ventilator tests A WARNING A WARNING Some sections of this manual refer you to the User s Reference manual for the Aespire 7900 anesthesia machine To expedite repairs you must have and be familiar with the User s Reference manual Part 1 and Part 2 for this product Refer to the Aespire User s Reference manual if you need further information about the operation of the system The revision level is displayed on the ventilator start up menu This manual includes test and calibration procedures for Revision 4 X software Service calibration functions let Datex Ohmeda trained users and Datex Ohmeda serv
149. ee e eee eeeenee 9 31 9 11 Clean or replace ACGO port flapper valve cece eects 9 33 9 12 Reconfigure sample gas return line cece cece teen eens 9 34 9 13 Replace the APLvalve cece cece IH 9 35 9 14 Replace the bag support APM eee eee Ine 9 36 9 14 1 Servicing the bag support arm 1 1 eee eee 9 37 9 14 2 Replace friction pad in lower bag arm assembly 000e eee 9 38 9 14 3 Replace bag port housing llle 9 39 9 15 Replace auxiliary O5 flowmeter sssssesessese I 9 40 9 16 Replace the suction control module ssseeeee nnn 9 41 9 16 1 Front panel method ssssssssssssssse II 9 41 9 16 2 Rearpanel method osi oiimi karainan nh E aAA eee e 9 42 9 17 Replace ABS breathing system components 0 c cece eee e eee 9 43 9 17 1 Replace Bag Vent switch assembly 000 cece cere e eee eens 9 43 9 17 2 Replace bellows base latch assembly 00 cece cece eee eens 9 44 9 18 Replace Casters sami noe tex een e RE TEX FO ENT CHEN WELT eae 9 45 9 19 Replace task light and switch 0c cece cece eee eee eee eens 9 46 9 19 1 To replace the task light switch 0 cece cece 9 46 9 19 2 To replace the task light circuit board 2 0 kk eee eee 9 46 9 20 Replace the display cable long arm 0 c cece eens 9 47 9 20 1 Removing the display arm 6 cece eee eee I 9 47 9 20 2 Replacing a display cable cece eee e teen eee
150. ee eee 4 33 4 3 24 Service Calibrations Required 0 0 cece eee eee e eee eens 4 34 02 05 1009 0541 000 4 1 Self tests Powerup tests Continuous tests 1009 0541 000 02 05 Periodic tests 4 Self Tests and Service Mode The Aespire 7900 Ventilator software includes self tests that determine whether or not the operating software is functioning properly and whether or not the electronic circuits on the circuit boards are functional The self tests include Powerup tests e Continuous tests Periodic tests The following is a list of the tests run at powerup e Sequential watchdog Logical watchdog Data RAM walking pattern test FLASH ROM CRC verification e Gas inlet valve test electrical and pneumatic e Calibration of the manifold sensor If one or more of these tests fail the display provides a readout of the problem The On and Off states ofthe Gas Inlet Valve GIV are tested at power up The manifold pressure will be tested to determine pass failure If the GIV causes the self test to fail on power up an alarm sound and the message Gas Inlet Valve Failure is displayed If the calibration of the manifold sensor fails on power up an alarm sounds and the message Manifold Pressure Sensor Failure is shown These tests are run continuously during normal operation and alarms are associated with each test A failure causes an alarm to display on the screen in the alarm display area Flow val
151. egulator tests if equipped with this option Section 3 13 Power failure test Section 3 14 Electrical safety tests Section 3 15 6 3 Aespire 7900 6 2 Aespire 7900 Planned Maintenance Serial Number Date YY MM DD Hospital Performed by O 12 months L1 24 month L1 This section covers the regular maintenance procedures minimum requirements needed to make sure that the Aespire 7900 anesthesia machine including the ventilator operates to specifications 6 2 1 Every twelve 12 Perform the following steps every 12 months months Parts Replacement O Replace the vaporizer port o rings Section 9 9 1 Kit Stock Number 1102 3016 000 Checks and Tests Refer to the Aespire 7900 User s Reference Manual Part 2 Perform the following steps O 1 User maintenance listed below Including disassembly inspection cleaning and parts replacement as required Section 3 and Section 2 AGSS Maintenance Empty any condensate from the reservoir disposable item Inspect air brake for occlusion Inspect clean or replace filter on active AGSS Breathing Circuit Maintenance Bellows Assembly Maintenance Bellows Assembly Tests O Sensor Calibration Flow Sensor Calibration Refer to listed sections in this manual Perform the following steps O 2 Perform the MOPV pressure relief valve test Section 6 4 6 4 02 05 1009 0541 000 O L LC E D E L1 D EI DI EI D
152. elected if necessary 4 Return to the Service Modes menu and select User Select Defaults Section 4 3 4 This menu determines the control settings used by the system at power up Configure these settings as desired by the customer 5 Return to the Service Modes menu and perform the following calibrations 1 a Adjust Drive Gas Regulator Section 4 3 18 1 b O2 Calibrations Section 4 3 19 1 c Calibrate Flow Sensors This step will zero flow and airway sensors Section 4 3 20 O d Pressure Sensitivity Section 4 3 21 O e Calibrate Flow Valve Section 4 3 22 L f Bleed Resistor Calibration Section 4 3 23 O 6 Exitthe Service Mode and go to Normal Operations Verify the Service Calibration message is not present in the normal system display 6 2 02 05 1009 0541 000 1009 0541 000 02 05 L1 D rongrpzcrsrrrror ir L1 L1 6 Installation and Maintenance 7 Complete the System Checkout by performing the following steps fed zd Inspectthe system Section 3 2 Pipeline and cylinder tests Section 3 3 Flow control tests Section 3 4 Pressure relief test Section 3 5 O supply alarm test Section 3 6 Flush flow test Section 3 7 Vaporizer back pressure test Section 3 8 Low pressure leaktest Section 3 9 Alarm tests Section 3 10 Breathing systems tests Section 3 11 Auxiliary O2 flowmeter tests if equipped with this option Section 3 12 Integrated suction r
153. election switch is in the vent position If the flow valve calibration test fails immediately the most likely fault is a failed manifold transducer It can also be a failed regulator or the regulator could need calibration Another cause could be a failed flow valve 02 05 1009 0541 000 4 3 23 Bleed Resistor Calibration 4 Self Tests and Service Mode The software calibrates the bleed resistor as described below Other than the setup procedure this calibration is completely automated Bleed Resistor Calibration Directions for bleed resistor calibration 1 Select the drive gas using the system configuration menu 2 Select the altitude using the system configuration menu 3 Perform the Cal flow valve per the directions on that menu 4 Remove the ABS assembly 5 Plug the manifold and the drive gas ports of the vent engine 6 Select the Start Cal selection and push the rotary encoder switch Calibration Status Go to Service Modes Menu Figure 4 34 Bleed Resistor Calibration menu 1009 0541 000 02 05 Remarks Calibration procedure 1 Remove the ABS breathing system from the machine 2 Remove the Exhalation Valve 3 Remove the Vent Engine cover 4 Plug the Manifold Port A and the Drive Port B on the Vent Engine interface valve O1 Onthe Bleed Resistor Calibration menu select Start Cal 6 Push the rotary encoder knob to start the calibration Software procedure The software perfor
154. eplacement 0c eee eee 9 12 9 8 3 Remove complete flowmeter head 0c cece eee cence ee eaaes 9 14 9 8 4 Replace flowmeter modules ccc cece ee eee eee eens 9 15 9 8 5 Replace flowmeter frame 0 cece eee ene eens 9 19 9 8 6 Replace O supply switch sss 9 20 9 8 7 Checkout procedure for O5 supply switch ccc eee eee 9 20 9 8 8 Replace secondary regulator manifold or balance regulator manifold 9 21 9 8 9 Replace O or N50 needle valves on machines with N50 s 9 22 9 8 10 Replace an Air needle valve on all machines or an O needle valve on machines WITHOUT OF someter muere x cis etes eden nice t ei ed 9 24 vii Aespire 7900 viii 9 9 Service vaporizer manifold parts 0 cece eee eects 9 25 9 9 1 Repair manifold port valve cece eee eee II 9 25 9 9 2 Checkout procedure for manifold port valve cece cece eee eee 9 26 9 9 3 Replace vaporizer manifold check valve 00ce cece eee eee eens 9 27 9 9 4 Replace vaporizer pressure relief valve ccc eee ee 9 29 9 9 5 Replace vaporizer manifold 0 c cece eee eect eee 9 30 9 10 Replace ACGO selector switch 0 0 cece eee eee ens 9 31 9 11 Clean or replace ACGO port flapper valve 0 cece eee eee eee 9 33 9 12 Reconfigure sample gas return line 6 eee eens 9 34 9 13 Replacethe APLVaIVe wis seacoast eee da coke e kr ew IR a e adis 9 35 9 14
155. eps 0 Air module connect 0144 3717 324 o Flowmeter labels refer to chart below Label panel flowmeter module 1006 1290 000 Side panel 05 Air flowmeter module 1009 3186 000 Screw label panel 1006 3608 000 10 Adapter single tube outlet 1009 3056 000 11 Clip small 1009 3309 000 12 Elbow 1 4 inch 1202 3804 000 13 Bezel flowmeter 3 gas 1009 3104 000 14 Bezel flowmeter 2 gas 1009 3108 000 Lubricate sparingly with Krytox 10 Illustrated Parts Note orientation of item 6 with flowmeter facing forward the barbs should face to the left Position the label on the panel so that the right edge of the label is flush with the right edge of the panel The left edge of the label will extend slightly beyond the left edge of the panel When mounted in the flowmeter module the flowmeter label on the right should slightly overlap the flowmeter label directly to its left The O label set contains a label for both the dual tube A and single tube B modules Make sure to install the correct label Chart Flowmeter Labels include knob labels 1009 0541 000 02 05 Stock Number ANSI Air Yellow 1006 0209 000 ISO 0 Neutral 1009 3211 000 Neutral 0 Neutral 1009 3211 000 Stock Number NO Blue 1009 3209 000 N20 Blue 1009 3209 000 N50 Neutral 1009 3240 000 Stock Number 0 Green 1009 3210 000 Air Black White 1009 3242 000 Air Neutral 1009 3240 000 10 23 Aespire 7900
156. er Circuit Breaker 4A Rocker Toroid 100 240V Screw M6x70 Lockwasher M6 Washer Cover transformer Screw M4x8 DIN84 for transformer cover Stock Number 1009 5698 000 1009 5757 000 1009 5779 000 1009 5674 000 1006 3245 000 1006 3246 000 1009 5690 000 0208 0070 300 1009 5752 000 1009 5753 000 1009 5716 000 1009 5717 000 1001 3305 000 1202 3551 000 1006 4421 000 1006 4422 000 1006 3805 000 1006 3578 000 1006 3555 000 1006 3807 000 1001 3309 000 1009 5722 000 1009 5721 000 1009 5720 000 1009 5719 000 1009 5692 000 0144 2131 923 9213 0560 003 0402 1107 500 1009 3063 000 1006 3178 000 02 05 1009 0541 000 10 Illustrated Parts AS 3112 7S Australia China E E i R r ake 5 15 TI g apanese 2M wl g CEE 7 7 4 SEV 1011 EURO Swiss e L CEE 7 4 BS1363 France UK BS 546 d Nema 5 15 India and South Africa z NA 1009 0541 000 02 05 10 17 Aespire 7900 10 13 Pipeline inlet fittings Item 10 18 Description Pipeline inlet 0 fittings Body O5 DISS Body O5 NIST Body 05 DIN Body 0 G 3 8 BSPP Pipeline inlet assembly O France Pipeline inlet assembly 05 Canada Pipeline inlet assembly O Australia Pipeline inlet N20 fittings Body N50 DISS Body N50 NIST Body N50 DIN Body N50 G 3 8 BSPP Pipeline inlet assembly N50 France Pipeline inlet assembly N50 Canada Pipeline inlet assembly N50 A
157. er nominally changes 25mV for every 1 cm H20 The instrumentation amplifier output is low pass filtered and buffered before being sent to the CPU Board Over Pressure Signal The DPL drive pressure limit switch is a pneumatic switch and is used to monitor the airway pressure In the Aespire 7900 the DPL switch monitors the Vent Engine manifold pressure to limit patient airway pressure It is designed to trip if the airway pressure reaches 104 cm H20 nominal The OVER PRESS signal is monitored by the system software and will disable mechanical ventilation disable the flow valve drive circuit and close the gas inlet valve in the event of an over pressure condition 02 05 1009 0541 000 2 Theory of Operation 2 1 Ventilator mechanical subsystems 2 7 1 Drive gas filter and Gas Inlet Valve 1009 0541 000 02 05 Refer to Figure 11 1 System connection block diagram in Section11 forthe complete pneumatic mechanical subsystem diagram The mechanical subsystems for the ventilator include Pneumatic Vent Engine Drive gas inlet filter e Gas inlet valve e Supply gas pressure regulator Flow control valve Drive gas check valve Mechanical Overpressure Valve MOPV Bleed resistor e Free breathing valve Exhalation valve Bellows assembly Breathing circuit flow sensors Drive gas can be selected from O or Air enters the Vent Engine 1 at a pressure of 241 to 690 kPa 35 to 100 psi through a 2 micron filter 2
158. ered 1407 3909 000 16 Screw shoulder M3 1407 3915 000 17 Needle Valve Assembly with DISS EVAC connector 1407 3918 000 18 Bag with 30 mm male connector 8004460 Lubricate sparingly with Krytox 10 56 02 05 1009 0541 000 10 Illustrated Parts 6 5 1009 0541 000 02 05 10 57 Aespire 7900 10 28 3 Active AGSS Items 1 through 12 are included in all AGSS kits Item Description Common Parts Stock Number Qty 1 Seal Receiver Body 1407 3901 000 2 Reservoir 1407 3903 000 3 Seal and scavenging down tube 1407 3904 000 4 Thumbscrew M6x28 5 1406 3305 000 5 O ring 4 42 ID 9 65 OD 1407 3923 000 2 6 Thumbscrew M6x43 1406 3304 000 7 Valve unidirectional negative pressure relief 1406 8219 000 Ta Seat Valve Negative Pressure 1406 3396 000 Tb Retainer disc 1400 3017 000 c O ring 20 35 ID 23 90 OD 1406 3397 000 Td Disc check valve 0210 5297 100 8 O ring 22 ID 30 OD silicone 1407 3104 000 2 9 O ring 21 95 ID 25 51 OD 1406 3558 000 10 Screw M4x8 9211 0640 083 2 11 Cap 3 18 Barb Silicone 1406 3524 000 12 Adapter auxiliary inlet 30 mm male to 30 mm male M1003134 13 Adapter auxiliary inlet 30 mm male to 19 mm male M1003947 Active AGSS Specific Parts 14 Receiver with air brake 1407 3900 000 15 Seal for filter and orifice 1407 3902 000 2 16 Filter 1406 3521 000 Active High Flow Specific Parts 17a Connector high flow M30 thread 1406 3557 000 18 Orifice high flow 1407 3920 000 Act
159. erform each of the calibrations Settings starting with the upper most selection ONLY select Set Service Calibration A if you know what you are doing Set Service Calibration A Go to Service Modes Menu Figure 4 35 Service Calibrations Required menu Remarks Figure 4 36 Set Service Calibration menu 4 34 The normal operation Service Calibration A alarm message is only removed when all the required settings or calibrations are completed The Set Service Calibration menu item is used by the factory to activate the Service Calibration alarm and require that all settings and calibrations be performed when the Aespire machine is set up for operation at its permanent location There is no need to set the Service Calibration A alarm in the field Select No when the following warning appears if you selected the Set Service Cal menu item Are you sure you want to Set Service Cal Selecting Yes will activate the alarm Schedule Service Cal and require that ALL the Calibrations Settings be performed ONLY SELECT Yes IF YOU KNOW WHAT YOU ARE DOING Yes 02 05 1009 0541 000 4 Self Tests and Service Mode If you select Yes you will see the screen displayed in Figure 4 37 Follow the directions on the screen to complete the calibrations Service Calibrations Required A The selections on this menu are the Calibrations Settings that are required when the Service Calibration A alarm is a
160. erial communication channels are configured as full duplex asynchronous RS232C ports The internal Baud Rate Generator establishes the communication baud rate with a higher limit of 19 2k Baud Special operating modes The serial channels are capable of operating in various looping modes for self testing as well as for remote testing of serial communications These tests include automatic echo and remote loop back Microprocessor Chip Selects The four programmable chip selects from Motorola 68340 access external memory and peripheral circuits providing handshaking and timing signals as well as a wait state generation watchdog logic and ventilation control signals 1 0 lines Spare 0 lines are used for digital control and or sense lines Counter timer 1 The first counter timer module is used to monitor the MC68340 system clock frequency The external 3 6864 MHz baud rate clock is the time base forthis measurement Counter timer 2 The second counter timer module can be used as desired by the application software The time base forthis timer is the internal 24 12 MHz system clock 2 29 Aespire 7900 2 30 Program memory Safety Relevant Computing SRC Watchdog systems Flash memory Two 512K x 8 Flash memory devices are used This memory contains the real time operating system RTOS and software code The Flash memory devices are socketed System RAM This memory consists of two 128 K x 16 CMOS static RAMs w
161. es NO OF WN K gt lt Pneumatic Connection Filter Direction of Flow ovo Check Valve 11 Schematics and Diagrams N20 Air 02 02 a i d 4 3 3 j3r6 3 Q Hm WR a ALS ALS ALS ALA 28 28 28 28 X 2 2 2 LS SB AB OB 6 o 6 j 1 6 ets Li LA L L 1 LH hie Til Ec rmi er Lan 7bx Tax TIAS 14a ut a Ole a lee T E 9 10 15 E 14b xm ME X x Z1 i 29x 23 Dine x Link 25 mne d x D NE Se a vat al rum lum Moal 000010000 0000 1 12 Sea ee o desees i 97 poc com mc Um DB 24m 22 22 dl 22 22 m iil E Es 5 6 ls 1 mA pa p a g E 23 A Cylinder Supplies B Pneumatic Manifold C Flowmeter Head D Vaporizer Manifold E ACGO Select Switch Aespire 7900 Control Display Module Task Light SSS SS SSS aS RS 232 1 t Ho 2a m VEB Bag Vent white ac Integrated ABS ON white Black S z orange d C
162. es calibration pass Alarm condition becomes false If calibration does not pass replace O cell If there is still a calibration problem replace the ESIB board Schedule low 1 Replaced CPU board Perform all calibrations in service mode service Cal 2 Calibration data corrupted Select gas medium Patient breathing Check ventilator settings and ACGO switch outlet detected in ACGO 3 position breaths detected in a 30 sec window User presses the alarm silence switch Service UserAlarm Internal calibrations are The system is Service Mode Calibration necessary for maximum operational Perform all calibrations accuracy refer to Section 4 3 24 Software Minimum Ventilator malfunction Ventilate manually Replace Error Shutdown Monitoring is not Software 5 reliable CPU board Software Immediate Ventilator malfunction Ventilate manually Replace Operating Shutdown Monitoring is not Software System Error reliable CPU board Software Minimum Time out or incorrect Replace the CPU board Watchdog Shutdown code executed Failure 5 6 Sustained Minimum Paw gt 100 cm H50 for Check tubing for kinks blockages Airway Shutdown 10 seconds disconnects Pressure 5 Calibrate the flow sensors 6 If persists check bellows pop off exhalation valve ESIB 1009 0541 000 02 05 1 39 Aespire 7900 Message Alarm type Enabling Criteria Alarm Condition
163. eshooting Is display dim but information can be seen Was there single audio tone on power up Is there a continuous or cycling audio Yes tone Check Display Cable to CPU Connections Yes No Replace CPU Board Is AC LED power light on Problem continues Check system circuit breaker Check AC power cable Disconnect J5 connector from CPU Perform continuity check on System Switch Problem continues Check Replace harness No Replace System Switch Yes Does the unit have Integrated CPU Disconnect 6 pin cable J200 from CPU to Power Supply Verify 12 5V and 16V power present Voltages present Replace No Power Supply Yes Replace CPU Board 1009 0541 000 02 05 Start Turn on System 1 Troubleshooting Check Contrast Yes Adjustment Service Mode AB 29 095 Problem continues Replace EL Yes Display Panel Replace CPU Board Disconnect 50 pin cable J2 from CPU to Power Supply Verify all voltages present Replace Power Supply Board Yes Replace CPU Board 7 45 Aespire 7900 7 7 3 Inaccurate volume ventilation troubleshooting Verify pass Calibrate Flow No Sensors Section 4 3 20 Yes Problem continues Perform All Calibrations and Yes Re evaluate Sensor Problem Examine for defect or water plug Problem pH P continues in lines Ensure customer is periodically depress
164. espiratory gas flow to and from the patient is monitored by measuring the differential pressure across a variable orifice in each flow sensor The pressure transducers for measuring the differential pressure are on the ESIB The patient airway pressure and the pressure in the ventilator manifold are measured by pressure transducers on the ESIB Conditioning circuitry is supplied for these transducers and for the Oxygen sensor used in the breathing circuit Switch ABS On Switch Canister Switch Circle Patient Circuit CO Bypass C Inspiratory Flow Transducer x 3 5 cmH20 Vent Engine Manifold AB 74 082 20to 120 20to 120 Bulkhead Expiratory Flow Manifold Transducer Pressure 3 5 cmH20 Transducer 02 Amplifier D ma EN 02 Sensor ACGO Selector Switch High Figure 2 20 Enhanced Sensor Interface Board ESIB functional diagram 1009 0541 000 02 05 2 35 Aespire 7900 Functional description Figure 2 21 Enhanced Sensor Interface Board ESIB block diagram 2 36 Power Supply Regulators The ESIB power supply is a 10 VA limited 12 volt supply originating at the CPU board It is filtered as it comes onto the ESIB board There are three regulators on the ESIB that are supplied by the 12 volt supply The first regulator is a LP2951 low dropout regulator that produces digital 5 volts This supply is used to power the flow sensor EEPROMs Setting the E2_PWR signal to logic low will shut
165. espire 7900 Message Alarm type Enabling Criteria Alarm Condition Service Repair Priority Removal Criteria Paw lt 10 high In range Paw data Paw lt 10 cm H50 Check the breathing circuit cm H20 available Perform flow sensor calibration 9 Alarm condition becomes false Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board PEEP Not low In range Paw data Pmin does not reach Check settings for not enough expiration time Achieved available within 2 cm H20 of PEEP by end of mechanical expiration for 6 breaths in a row Alarm condition becomes false or any control setting changed except Plimit or mechanical ventilation transition on to off Check the breathing circuit Occlusions Check scavenging Check ventilator output with PEEP off Perform flow sensor calibration Check that the patient airway pressure display matches the airway pressure gage If they match the problem may be pneumatic supply pressure regulator inlet or flow valve etc Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board Positive SIB Minimum Vref Out of Shutdown Range 5 ESIB 12V supply voltage out of range First verify that the 15V Analog Supply Counts value is between1914 and 2262 If not in range see the 15V Analog Out of Range alarm for diagnostics Then check the 12V ESIB Supply Verify that the Counts value is between 1779 and 2322 If 12V ESIB Sup
166. ettings If Facility Defaults is selected the system powers up with the default facility settings and returns to default settings when End Case is selected Ask the customer BEFORE changing any default settings Make sure that they understand these options can only be set in Service Mode The following parameters may be set in User Select Defaults s Ventilation Mode s Tidal Volume VT e Inspired Pressure Pinspired Respiratory Rate e E Ratio s Pressure Limit Plimit s Inspiratory Pause Low O Alarm Limit High O Alarm Limit Low VE Alarm Limit e High VE Alarm Limit Low VTE Alarm Limit e High VTE Alarm Limit e Trigger Window optional s Flow Trigger Level optional Inspiratory Termination Level optional s Tinspired 4 13 Aespire 7900 4 3 5 Test CPU and The software checks the CPU ROM RAM and display RAM through this Memory menu When Start Test is selected the series of tests begins to run When each test is running the word Testing appears after the test name Test CPU and Memory Directions for Testing 1 Select Start Test to perform the test Test Display RAM Go to Service Modes Menu Figure 4 13 Test CPU and Memory menu First the software tests the CPU integer instruction set and the CPU register s If this test fails the CPU did not perform the integer instruction set correctly or the CPU register s have failed Next the software tests the Flash ROM
167. f the bag support arm port housing clean and lubricate sparingly with Krytox the exposed metal end F and the guide slot G of the bag support arm onto the bag arm Secure it with the retaining ring the pivot boss H before replacing the release lever lever adjust the mounting nut so that a 2 mm gap remains between the lever and housing when the release lever is fully depressed Replace the bag arm cover 9 39 Aespire 7900 9 15 Replace auxiliary 05 flowmeter 1 2 9 4 5 Bleed all gas pressure from the machine Section 9 1 Ensure that all cylinder and pipeline gauges read zero before proceeding Remove the tabletop Section 9 3 Remove the adjustment knob from the flowmeter pull forward Remove the gauge panel mounting screws and move the panel forward to access the flowmeter 9 Disconnect the inlet tube fitting A Disconnect the tube B from the outlet fitting Remove the four screws C that hold the flowmeter mounting bracket to the front panel Transfer the mounting bracket to the new flowmeter 10 Reassemble in reverse order 11 Perform the checkout procedure Section 3 9 40 02 05 1009 0541 000 9 Repair Procedures 9 16 Replace the suction control module The suction control module can be replaced by removing the front panel along with the ABS and the tabletop to gain access Alternatively if the situation warrants the suction control modu
168. f the valve body O ring Valve body Flapper Valve body O ring or Flapper Y T Using a hex wrench put the wrench through one of the holes of the valve body and pull down to remove the valve body and o ring 8 Verify that parts are free of dust and dirt 9 Replace the flapper by inserting the flapper stem and gently pulling the stem until the flapper secures to the valve body 10 Lightly lubricate the o ring with Krytox 11 Place the lubricated o ring on the valve body port at the bottom of the manifold 12 Gently install the valve body in the manifold s Check that the o ring makes a good seal between the manifold and the valve body Check that the flapper valve makes solid contact with the valve body 13 Install the valve block 14 Reconnect the tubing to the valve block Pull on the tube to ensure that it is locked in the fitting 15 Install the vaporizer front panel 16 Perform the checkout procedure Section 3 9 28 02 05 1009 0541 000 9 9 4 Replace vaporizer pressure relief valve 1009 0541 000 02 05 gt a OO N e o O A 9 Repair Procedures Setthe system switch to Standby Remove the vaporizers from the vaporizer manifold Remove the upper rear panel Section 9 2 Using a 13mm open ended wrench remove the vaporizer pressure relief valve by turning counterclockwise Verify that the parts are free of dust and dirt Install
169. fails replace the ESIB Memory UserAlarm The system cannot Default settings are Replace the CPU board EEPROM access some stored used Ventilation is still Fail values possible but service is necessary Memory Minimum CRC failure Replace the CPU board flash Shutdown Failure 5 6 Memory Minimum Walking pattern test Replace the CPU board RAM Shutdown failure Failure 5 6 Memory Minimum Memory failure of Replace the CPU board Redundant Monitoring system parameter s Storage Fail 7 8 7 36 02 05 1009 0541 000 1 Troubleshooting Message Alarm type Enabling Criteria Alarm Condition Service Repair Priority Removal Criteria Memory Minimum Walking pattern test Replace the CPU board video Shutdown failure Failure 6 6 Monitoring UserAlarm A severe malfunction Ventilate manually Cycle system power On Only prevents mechanical Standby On If the alarm clears restart ventilation Other mechanical ventilation alarms may also occur If persists replace CPU board No Circuit User Alarm Inthe Aespire 7900 the Check Module input to the ESIB is harness to ESIB ee a TES TOIT diete n cable from ESIB to CPU board Circle patient circuit No CO UserAlarm The canisters are open User setting Close the canister release to absorption out of the circuit but remove CO from exhaled gas the bypass mechanism prevents a leak optional feature
170. fer to section 10 29 Refer to section 10 6 1406 3304 000 1406 3319 000 02 05 1009 0541 000 10 5 Front panel gauges and system switch Item 1 2 3 4 5 o gt 10 11 Description Panel gauge front Switch D O system Gauge low pressure includes mounting hardware Connector 1 8 inch Legris to 10 32 Gauge high pressure includes mounting hardware Connector 1 8 inch copper tube to 5 16 24 Label gauge Tube Kit copper tube and fittings inboard cylinder Tube Kit copper tube and fittings 3rd gas Plate gauge blanking Plate gauge blank backing Palnut 1009 0541 000 02 05 Stock Number 1009 3018 000 1006 8452 000 05 ANSI N50 ANSI Air ANSI 0 ISO N20 ISO Air ISO 0 Neutral N20 Neutral Air Neutral 1006 8371 000 1006 8372 000 1009 3045 000 1009 3147 000 1009 3090 000 Stock Number pipeline 1009 3079 000 1006 3711 000 1009 3081 000 1009 3082 000 1009 3083 000 1009 3202 000 1009 3082 000 1009 3203 000 1009 3234 000 1009 3235 000 1009 3236 000 10 Illustrated Parts Stock Number cylinder 1009 3080 000 1006 3712 000 1009 3199 000 1009 3201 000 1009 3200 000 1009 3204 000 1009 3201 000 1009 3205 000 1009 3237 000 1009 3238 000 1009 3239 000 10 9 Aespire 7900 10 6 Rear panel components 10 10 Item Oo oo 1 DOO BP CO h2 e e e e RP he B oor WN OO 17 14 15 16 17 13 15 16 Description Co
171. fer to section 10 29 3 1009 3271 000 1009 3270 000 1009 5534 000 1009 3123 000 1009 3384 000 1011 3524 000 0221 0702 300 1009 8292 000 1011 3511 000 1009 3135 000 1009 3373 000 1009 3374 000 1009 3371 000 1009 3372 000 Refer to section 10 26 1009 3137 000 1009 3385 000 6700 0647 000 02 05 1009 0541 000 10 29 2 Suction Control Module m ud only with Venturi Las TOL i Item 1a 3a 3b o ON 0 0 A 10 Description Gauge 760 mmHg Gauge 1 Bar O ring Gauge included with gauge assy 2ea required Control panel assembly with suction regulator knob and mode control knob Regulator Module plugs into manifold assembly O ring Regulator Module Large included with regulator module O ring Regulator Module Stem included with regulator module Manifold Assembly without Gauge and Regulator Module Screw 6 2 inch Mounting bracket Screw 6 1 inch Filter Pilot valve adapter assembly includes plunger jam nut and valve assembly Cap white 10 Illustrated Parts Stock Number 1009 3227 000 1009 3228 000 6700 0133 500 1009 3213 000 6700 1225 800 6700 0136 500 0210 0527 300 1009 3277 000 1009 3340 000 1009 3255 000 1009 3339 000 0206 5159 300 1009 3278 000 1009 3192 000 Lubricate the regulator module o rings and the mating bore of the manifold sparingly with Dow 111 lubricant Drop the plunger 9a round end first into the manifold Thread the pi
172. figurations of the product The Aespire 7900 is not suitable for use in an MRI environment 1 4 Configuration options 1 4 1 Standard configuration 1 4 2 Options 1009 0541 000 02 05 The standard configuration includes the following items s 7900 Ventilator Advanced Breathing System ABS e Vaporizer manifold 2 Vap Auxiliary Common Gas Outlet ACGO e Serial Interface RS232 e Bi level LED light strip Two large drawers Options include the following items e Selected software features e Pipeline configurations 02 N20 O Air or O2 N50 Air Gas cylinder configurations two inboard inboard configuration 05 N50 O Air or 03 03 Manual bag on support arm or on tube Gas scavenging active adjustable passive or venturi Asuction regulator pipeline vacuum or venturi vacuum e An auxiliary O5 flowmeter Localized electrical power outlets isolated or non isolated Two Control Module Ventilator Display mounting solutions long arm or folding mount s Various monitoring display mounting solutions 1 3 Aespire 7900 1 5 System components de m v SS 11 TA 10 NA LL 8 7 6 5 O9 4 3 Auxiliary common gas outlet ACGO switch ACGO Inspiratory check valve Inspiratory flow sensor Canister carbon dioxide absorbent Canister release Expiratory flow sensor or flow port adapter Leak test plug Expiratory check valve Breathing system release Manu
173. g 34 9 mm Cap inlet valve O ring upper Viton Shuttle inlet valve U cup upper EDPM fits on shuttle valve U cup lower Viton fits on shuttle valve O ring lower Viton Filter under GIV 2 micron install course side DOWN Fitting manifold pressure Reservoir pneumatic engine O ring base 56 87 ID x 60 43 OD O ring screw head 0 219 ID x 0 344 OD Screw M6x90 Flow control valve 5 Volt O ring under flow control valve 2 each Drive gas check valve O ring under drive gas check Interface Manifold Regulator 172 kPa BCG Vent Engine Connector board not part of assembly 10 Illustrated Parts 7 6 5 4 Stock Number 1009 8423 000 Refer to section 9 24 3 1503 3088 000 1006 4730 000 1500 3158 000 1503 5006 000 9221 3032 116 1503 5018 000 1503 3090 000 1503 3089 000 1503 3108 000 1504 3708 000 1500 3116 000 1504 3704 000 1504 3614 000 0210 0686 300 1504 3004 000 1503 3218 000 1503 3056 000 1503 3006 000 1503 3213 000 Refer to section 10 23 1 1504 3623 000 1009 6126 000 10 45 Aespire 7900 10 23 1 Vent Engine under side Item Description Stock Number 1 Interface Manifold pneumatic engine 1504 8505 000 with free breathing valve and mechanical overpressure valve O ring 12 42 ID x 15 98 OD 2 1006 3615 000 1a Seat free breathing valve 1503 3204 000 1b Valve flapper 0211 1454 100 1c O ring 1503 3208 000 2 Fitting 6 35 mm 1 4 inch 1504 3621 000 3 Plug 6 35 mm 1 4 inch
174. g an insufficient reserve supply in case of pipeline failure Before testing the system ensure that The equipment is not damaged e Components are correctly attached The breathing circuit is correctly connected not damaged Pipeline gas supplies are connected e Cylinder valves are closed s Models with cylinder supplies have a cylinder wrench attached to the system Models with cylinder supplies have a reserve supply of O connected to the machine during system checkout e The casters are not loose and the brakes are set and prevent movement The power cord is connected to a wall outlet The mains indicator comes on when AC Power is connected 3 2 02 05 1009 0541 000 3 Checkout Procedure 3 3 Pipeline and cylinder tests 1009 0541 000 02 05 A CAUTION A WARNING Top revent damage Open the cylinder valves slowly Do not force the flow controls If your system does not use cylinder supplies do not do steps 2 and 3 1 Disconnect the pipeline supplies and close all cylinder valves if equipped If the pipeline and the cylinder pressure gauges are not at zero bleed all gasses from the system gt o 00089 Connect an O supply Setthe system switch to On Setthe flow controls to mid range Make sure that all gauges but O are at zero Disconnect the O supply Make sure that the O gauge goes to zero As pressure decreases alarms for low O supply pressure should occur 2
175. gal program entry for that mode The watchdog is then toggled by writing that channel number to the watchdog check address during any program paths that occur only in the selected mode of operation An error is detected if program flow is disrupted and an illegal sequence tries to toggle the watchdog with its own different channel number Each mode includes multiple accesses to its watchdog channel number to improve detection of incorrect program flow Watchdog operation The channel number must be the same for both watchdog initialization and toggle channel number A difference is detected as errant program execution and causes an immediate level 7 interrupt IRQ7 A legal watchdog toggle must occur at least once every 35 msec to prevent a time out and subsequent level 7 interrupts A system reset will occur between 62 5 msec and 250 msec if no legal toggle addresses occur by that time Multiple level 7 interrupts will occur priorto a reset The output of this watchdog is connected to IRQ7 on the 68340 processor 02 05 1009 0541 000 2 Theory of Operation Error response sequence Errors detected by either watchdog are handled in the following sequence At the first detection of any error a watchdog responds by issuing an IRQ7 interrupt f the exception handler software for IRQ7 cannot correct the error then the next detection of an error causes a soft system reset e f the error still cannot be corrected then an audio alarm sou
176. hard for a good seal b Remove all airfrom the bulb c The bulb should not inflate in less than 60 seconds 9 Attach the negative low pressure leak test device to the ACGO outlet 10 Remove all air from the bulb The bulb should not inflate in less than 45 seconds 11 Remove the valve tester 12 Reassemble the inlet tube vaporizer port o ring and the upper rear panel 13 Conduct a negative low pressure leak test on the system Section 3 9 1 If the valve test tool is not removed before flowing gas through the system pneumatic head damage could result 02 05 1009 0541 000 9 9 3 Replace vaporizer manifold check valve 1009 0541 000 02 05 9 Repair Procedures 1 Setthe system switch to Standby 2 Remove the vaporizers from the vaporizer manifold 3 Remove the upper rear panel 4 Disconnect the tubing from the valve block 5 Remove the valve block To access the left hand mounting screw A remove the right viewed from front side panel B e The right side extrusion include an access hole C for removing the left hand mounting screw Note For early production machines that do not have an access hole in the extrusion you must remove the vaporizer manifold to remove the valve block 9 27 Aespire 7900 Note The valve body o ring and flapper do not come out with the block They stay intact at the bottom of the vaporizer manifold 6 Pull the flapper out o
177. he N20 flow at which the N50 valve becomes engaged with the O valve flowing at 200 mL min This engagement point is an arbitrary benchmark that assists in calibrating the proportioning system The position of the kick in is set in the factory During field calibration you set the O flow to 200 mL min and the N50 flow to the kick in flow usually in the range of 400 to 700 mL min and then install the sprockets with the 05 knob sprocket engaged 02 05 1009 0541 000 2 Theory of Operation 2 3 Flow through the breathing system 2 3 1 Overview of flow This section looks at three types of flow paths paths Ventilation paths How gas flows from the drive source bag or bellows to and from the patient Fresh gas paths Fresh gas can flow from the machine interface directly to the patient through the inspiratory check valve or through the absorber into the expiratory flow or directly to an external circuit through the optional auxiliary common gas outlet Scavenged gas paths APL or Pop off 1009 0541 000 02 05 2 11 Aespire 7900 2 3 2 Manual ventilation Manual inspiration The Bag Vent switch closes the ventilator path B Figure 2 4 Gas flows from the bag 1 through the absorber 2 into the breathing circuit module and through a unidirectional valve inspiratory check valve to the patient 3 During inspiration fresh gas FG flows from the machine into the inspiratory limb upstream of the inspiratory check v
178. he N20 supply pressure to the N20 flow control valve 16 The O secondary regulator pressure at a pilot port controls the output of the balance regulator The N50 output pressure drops with decreasing O supply pressure and shuts off hypoxic gas flow before the 05 supply pressure reaches zero A chain link system Link 25 on the N50 and O flow controls 16 11 helps keep the O concentration higher than 21 approximate value at the common gas outlet The mixed gas goes from the flowmeter outlet through the vaporizer manifold and vaporizer 23 that is On to the ACGO selector switch E A pressure relief valve 24 sets the maximum outlet pressure The ACGO selector switch directs the mixed gas to the selected circuit to the breathing system 26 or to the ACGO 27 2 3 Aespire 7900 Key to Numbered Components 2 4 Key to Symbols NOoORWNE 15 16 17 19 20 21 22 23 24 25 26 27 28 29 Pipeline pressure gauge Pipeline inlet Oylinder pressure gauge Oylinder inlet maximum of 3 cylinders Primary regulator cylinder pressure High pressure relief valve 758 kPa 110 psi Supply connections for the ventilator a 0 drive gas b Air drive gas System switch Switch for low O supply pressure alarm used with the ventilator 10 11 12 14 O secondary regulator 207 kPa 30 psi O flow control valve O flow tube s O Flush a Flush valve b Pre
179. he N50 knob then remove the knob C Loosen the set screws on the N50 sprocket and the O knob d To remove grasp the O5 knob sprocket N50 sprocket and chain as an assembly Remove as an assembly e Remove the spacer from the N20 needle valve spindle f Remove the pilot tube going to the balance regulator 9 16 02 05 1009 0541 000 1009 0541 000 02 05 9 Repair Procedures g The O and N30 flowmeter modules are held together by a single screw Remove the screw located on the side of the O flowmeter module h Hold the flowmeter modules with the flowtubes facing you i Grasp the modules at the bottom of the regulator manifolds and push the left module away from you until the N20 module separates from the O module j Pull the modules sideways to separate them at the top Save the u clip spacertube and the o ring for reassembly 5 To reassemble the flowmeter modules perform the previous steps in reverse order Note The u clips must be reinstalled with the barbed leg to the left as viewed from the front t U Clip O ring Spacer Tube Top of flowmeter module 6 Install the screw through the O flowmeter module to locks the 05 and N50 flowmeter modules together 7 Reattach the pilot tube that goes to the balance regulator 8 Install the flowhead into the machine Reconnect the tubing and the O supply switch harness 9 Confirm needle valve calibration Section 5 3
180. he bellows inflated It is piloted closed during inspiration and remains closed until the bellows is refilled during exhalation It will exhaust lt 4 L min excess fresh gas flow at lt 4 cm H50 ji 1 Vent Engine Atmosphere i T Free Breathing l S Check Valve j i L Mechanical Over Pressure Vale 110cmH20 G ane Drive Gas Check Valve T lation Valve 71 3 5cmH20 bias 2 0 cm H20 bias i 0 10 LPM Inspiratory Flow i 0 20 LPM Control Valve i A T i pl 25 psig lz mL Reservoir NH psi i 15LPM Gas inlet H Valve Control Bleed to 1LO0LPM 3 0 c if continuous rate Figure 2 26 Bellows pressure relief valve 1009 0541 000 02 05 2 41 Aespire 7900 2 7 6 Exhalation valve 2 42 The exhalation valve contains an elastomeric diaphragm that is used along with the flow valve to control the pressures in the breathing circuit The exhalation valve includes two male ports on the bottom for Bellows drive gas 8 Exhalation valve pilot 9 manifold pressure The exhalation valve includes three ports on top that connect to the bellows base manifold Drive gas pass through 10 s Drive gas return and pop off valve flow 11 APL exhaust flow to scavenging 12 A port atthe back ofthe exhalation valve 13 connects to the down tube that directs all the exhaust flows to the scavenging receiver The exhalation valve is normally open Approximately 2 cm
181. he lower electronic enclosure to be jumpered Each test routine sets up the serial port circuits so transmitted data is echoed directly back to the receive circuits The test fails if the data sent out is not equal to the data received If only the Proprietary Port Test fails replace the CPU If both tests fail checkthe harness connections between the control board and the Serial Adaptor Board SAB e check the ribbon cable between the SAB and the external connector replace the SAB Test Serial Ports Directions for Serial test 1 Disconnect any serial port connections from the back of the machine 2 Jumper pins 6 and 13 on the public port pins 2 and 3 on the proprietary port 3 Select Start Public Port Test to start the testing 4 Select Start Proprietary Port Test to start the testing 5 Remove jumpers from serial ports and reconnect any monitor to the serial port that may have been disconnected Public channel Start Public Port Test Proprietary channel Start Proprietary Port Test Go to Service Modes Menu Figure 4 20 Test Serial Ports menu 02 05 1009 0541 000 4 3 12 Breathing System Leak Test Note 4 Self Tests and Service Mode You can estimate how much of a leak there is in the ventilator portion of the breathing system by closing the patient circuit inflating the bellows and observing how quickly they fall on their own weight part of the machine checkout proced
182. he message No entries in log 02 05 1009 0541 000 4 3 2 Error Log Figure 4 3 Error Log menu Clear Error Log Remarks 1009 0541 000 02 05 4 Self Tests and Service Mode There are two special types of alarms Minimum monitoring alarms that stop mechanical ventilation Minimum system shutdown alarms that stop mechanical ventilation and monitoring An alarm message that results from these special types of alarms is considered an error alarm The Error Log displays up to 10 of the most current error messages that have been logged Each log entry shows Bootup Count number the bootup count is incremented each time the machine is turned on Time ms the time in milliseconds since bootup when the latest error condition occurred Address the place in the software sequence where the last occurrence of the error took place Error message associated with the particular error condition Error Log Bootup Count Time ms Address Error 3 83907058 14elc Software Watchdog Failure Displaying 1 1 of 1 Bootup Count Last Cleared 2 Clear Error Log Current Bootup Count 9 Go to Service Modes Menu The error address and software revision are important pieces of information to note if technical support is required The bottom left corner of the screen displays additional information Bootup Count Last Cleared Current Bootup Count To clear the error log select Clear Error Log The sys
183. he service mode via a hardware reset 4 5 Aespire 7900 4 3 1 Alarm Log Figure 4 2 Alarm Log menu 4 6 Clear Alarm Log Remarks The Alarm Log displays up to 10 ofthe most current alarm messages that have been logged Each log entry shows Bootup Count number the bootup count is incremented each time the machine is turned on Time ms the time in milliseconds since bootup when the latest alarm condition occurred ft Times the number of times that the specific alarm condition has occurred during the noted bootup count Alarm message associated with the particular alarm condition Alarm Log Bootup Count Time ms Times Alarm 14 3165476 Check Flow Sensors amp 14 2571444 Vr Not Achieved 14 921980 Low Paw 14 114892 PEEP Not Achieved 14 106884 Sustained Paw 13 663900 Ventilate Manually Pressure Limit Switch Failure 563880 Inspiration Stopped 4 319392 Low Paw 71872 Sustained Paw 57392 Pres Mode Not Avail Displaying 1 10 of 10 Bootup Count Last Cleared 6 Clear Alarm Log Current Bootup Count 15 Go to Service Modes Menu The bottom left corner of the screen displays additional information Bootup Count Last Cleared Current Bootup Count Select to clear the alarm log The system will ask you to confirm that you want to clear the log After the Alarm Log is cleared e the Bootup Count Last Cleared number will be reset to the Current Bootup Count number e the menu will show t
184. ice personnel perform ventilator setup functions tests calibration and measurements from the front panel display Normal operational tests calibration and troubleshooting can be performed on your Aestiva 7900 Ventilator without removing components from the system Repair may require removing the ventilator components from the anesthesia machine Section 4 Service Mode Tests and Calibration must be performed whenever you access any internal component of the Ventilator to verify that all critical parts of the Ventilator are still operational and within specification After the Ventilator has been serviced you must perform Post Service Checkout to verify the entire Anesthesia System is properly functioning before the system can be returned to clinical use 02 05 1009 0541 000 1 Introduction 1 3 What is an Aespire 7900 Note The Aespire 7900 is a compact integrated and intuitive anesthesia delivery system The ventilator portion provides mechanical ventilation to a patient during surgery as well as monitoring and displaying various patient parameters The system uses a microprocessor controlled ventilator with internal monitors electronic PEEP Volume Mode and other optional features A serial interface permits communication to cardiovascular and respiratory gas monitoring Configurations available for this product depend on local market and standards requirements Illustrations in this manual may not represent all con
185. ige Clamp yoke Spacer gas block 2 Screw M8 x 25 long socket head cap 2 Elbow fitting for cylinder pressure gauge coppertube connection of gas supply Label Set cylinder supply Oz Label Set cylinder supply N20 Label Set cylinder supply Air 1009 0541 000 02 05 DIN Inboard 1006 3207 000 1006 3208 000 1006 3209 000 10 Illustrated Parts DIN Large Cylinder Inboard 1006 3880 000 1006 3881 000 Stock Number 1009 3085 000 0144 2131 913 9213 0560 003 Refer to section 10 14 1 0219 3372 600 1001 4076 000 1001 4077 000 9211 0680 253 1006 3713 000 1006 3854 000 1006 3855 000 1006 3856 000 10 19 Aespire 7900 10 14 1 Cylinder inlet fittings 1 Pin Index Item 1a 1b 1c 1d 1e 2a 2b 2c 2d 2e 2f 28 2h 10 20 1e Description Cylinder inlets Pin Index Gasket O ring Adapter inlet Filter sintered bronze Retaining ring filter Cylinder inlets DIN Screw M8x16 Sealing ring DIN DIN Adapter 02 DIN Adapter N40 DIN Adapter Air O ring 0 687 ID 0 812 OD Filter sintered bronze 2 DIN external cylinder 0210 5022 300 9221 3013 116 1001 4075 000 9914 6380 000 1001 5954 000 0144 2140 242 1009 3356 000 1006 4000 000 1006 4001 000 1006 4002 000 0210 0544 300 9914 6380 000 Sealing ring N20 DIN Conn 11 1202 3641 000 Adapter large cylinder N50 Adapter large cylinder O5
186. imate minimum 1 to 3 ratio of flow between O and N50 When engaged minimum O concentration a tab on the O knob is in contact with a tab on the O sprocket so that the O and N50 knobs turn together an increase in N5O flow causes an increase in O flow a decrease in O flow causes a decrease in N50 flow Linkage Tabs N CED Cc CO O Knob 2 9 Aespire 7900 2 10 Higher concentrations of O are possible when the link system is not engaged either by reducing the N50 flow below the point of engagement or by increasing O flow above the point of engagement When the N50 flow is below the point of engagement increasing the N20 flow turns the O sprocket without changing the O flow At the point of engagement the tab on the O sprocket makes contact with the tab on the 0 knob Once the linkage is engaged turning the N20 flow control counterclockwise increase in N20 flow also turns the O knob counterclockwise increase in O flow to maintain a nominal 25 minimum O concentration Decreasing the N20 flow from the engagement point rotates the tab on the O sprocket away from the tab on the O knob Increasing the O flow rotates the knob tab away from the sprocket tab Either action increases the 05 concentration above 21 Sufficiently decreasing O flow or increasing the N50 flow brings the two tabs back into contact and engages the linkage The kick in point is defined as t
187. ing drain button to empty watertrap Yes Do Bit counts on either Insp Exp Flow channel vary more than 10 from the inital zero counts Perform the Flow Inspect pneumatic Sensor Leak test lines for leaks or Yes water plugs between flow sensor and SIB Problem Solved Perform All Calibrations Water leaks or kinks f Yes No Inspect Breathing Circuit check valves Replace seat and disks as necessary Correct kinks or 7 46 Switch Insp and Exp pneumatic connections and repeat previous test leaks Replace harness if necessary AB 29 093 Problem i Continues Problem No Moves to other sensor channel Yes Yes Replace bulkhead harness Perform All Calibrations and Re evaluate Perform All Calibrations and Re evaluate No Replace SIB Perform All Calibrations and Re evaluate 02 05 1009 0541 000 7 7 4 No ventilation troubleshooting Does bellows Verify pass move Calibrate Flow 7 Sensors Yes Yes Section 4 3 20 No Check the output of the Drive Gas Regulator Proceed to i Inaccurate Volume Ventilation Section 4 3 18 Troubleshooting Regulator pressure OK at 25 psi Yes Set Flow Valve to 120 L min High flow gas exhausts from drive gas port Test Flow Valve Yes Examine Exhalation Valve and diaphragm Does circuit pressurize Yes Check function of drive pressure pop off valve Refer to Sectio
188. ise to shut off the flow Note To check flow accuracy be sure that the flow test device is capable of measuring O to 15 L min with an accuracy of 296 of reading 1 2 Connect the flowmeter outlet to the flow test device Adjust the flowmeter so the center of the ball aligns with the selected test point observe that the ball maintains a steady position for 10 seconds The test device reading should be between the limits shown for each of the selected settings in the table below Flow Tester Reading Flowmeter Setting Lower Limit Upper Limit L min L min L min 1 0 52 1 48 3 2 56 3 44 5 4 60 5 40 10 9 70 10 30 maximum 12 00 valve fully open 4 Rotate the flow control clockwise to shut off the flow 5 Close the O cylinder valve or disconnect the O pipeline 02 05 1009 0541 000 6 Installation and Maintenance 6 6 Integrated Suction Regulator tests Note Gauge Accuracy 1009 0541 000 02 05 Note Flow Test There are two types of integrated suction systems for the Avance anesthesia machine Continuous Vacuum Regulator Three Mode Pipeline Vacuum Continuous Vacuum Regulator Three Mode Venturi Derived Vacuum For Pipeline Vacuum systems a vacuum source of at least 500 mm Hg 67 kPa or 20 in Hg is required for testing The supply open flow must be a minimum of 50 L min For Venturi Derived Vacuum systems an O or Air source of at least 282 kPa 41 psi is required for testing
189. ith on board expansion capability to 512K x 16 SRAMs Non volatile memory This memory consists of a single 2K x 8 EEPROM and stores information which needs to be retained when the system is powered down This includes user selectable operating parameters and a system error log This section addresses the Safety Relevant Computing SRC requirements of DIN V VDE 801 The electronic hardware design provides the necessary capability for meeting these requirements This includes Digital monitoring of selected control signals Analog monitoring of supply voltages internal control voltages feedback signals from the flow and inlet valves and battery voltage e Automatic switch over to battery operation in the event of an interruption in ac power Use ofthe software watchdog timer in the 68340 processor for temporal monitoring with direct de energizing ofthe flow and inlet valves in the event of a non recoverable error Use of an operating mode watchdog for logic and timing monitoring with direct de energizing of the flow and inlet valves in the event of a non recoverable error Monitoring ofthe system clockto detect an operating frequency out of an acceptable range Use of a redundant high pressure limit safety switch in the bellows drive circuit which directly de energizes the flow valve MC68340 software watchdog timer Each mode of ventilator operation has a unique watchdog toggle channel that is initialized at the le
190. ive Low Flow with EVAC connector Specific Parts 17b Connector low flow EVAC 1406 3597 000 18 Orifice low flow 1407 3919 000 Active Low Flow with 25 mm connector Specific Parts 17c Connector low flow 25 mm 1406 3573 000 18 Orifice low flow 1407 3919 000 Active Low Flow with 12 7 mm hose barb connector Specific Parts 17d Connector low flow 12 7 mm 1 2 inch 1406 3574 000 18 none Active Low Flow with 30 mm ISO male connector Specific Parts 17e Connector low flow 25 mm 1406 3555 000 18 Orifice low flow 1407 3919 000 Lubricate sparingly with Krytox 10 58 02 05 1009 0541 000 10 Illustrated Parts 6 5 1009 0541 000 02 05 10 59 Aespire 7900 10 29 Integrated Suction Regulator 10 29 1 Major Components Continuous and Venturi suction 10 60 suction 15 15 vacuum AT 13 vacuum j 6 7 suction Description Suction Control Module Venturi Assembly Cover blank if no Suction Bracket blank cover mounting Screw M4x10 self tapping Manifold Screw M5x20 BHSCS PT THD FORMING Connector NIST Connector Barb Connector Air Liquide Muffler for Venturi Drive Coupling Colder insert metal Coupling Colder body black Coupling Colder insert black Coupling Colder body white Coupling Colder insert white Tubing Tygon Fitting barb to 8 mm Legris Cap white Overflow Safety Trap Stock Number Refer to section 10 29 2 Re
191. justment knob until the Service Mode Confirmation menu appears Vol Alarms On D e 2 Ss 9 Ja lt 4 4 02 05 1009 0541 000 4 3 Main Menu Service Mode Figure 4 1 Service Mode main menu Go to Normal Operations 1009 0541 000 02 05 The service mode is entered from the service 4 Self Tests and Service Mode confirmation menu Select Service Mode and push the adjustment knob The Service Mode main menu allows navigation to the individual menus for alarm or error logs calibrations system configurations diagnostic tests and tools and user selected defaults Service Mode Software Version 46 Software Date Nov 16 2004 10 14 37 Total System Hours 1380 Alarm Log Test 5V Fail Alarm Error Log Test Serial Ports System Configuration Breathing System Leak Test User Select Defaults Display A D Channels Test CPU and Memory Display Discrete VO Signals Test EEPROM Display Battery Status Test GIV Test Panel Switches Test Flow Valve Flow Valve Test Tool Test Drive Pressure Limit Switch Adjust Drive Gas Regulator Oz Calibrations Calibrate Flow Sensors Pressure Sensitivity Calibrate Flow Valve Bleed Resistor Calibration Service Calibrations Required amp Go to Normal Operations Any menu can be selected by pressing the control knob The software version software date and total system hours at the top of the Service Mode main menu are not selectable Provides the means to exit t
192. kage 3 Control port plugged or drive gas inlet hose blocked Continuous flow of supply gas before machine is turned ON 1 External hose leak 2 GIV leak 1 Check hose 2 Check repair GIV solenoid 1 42 02 05 1009 0541 000 1 Troubleshooting Bellows does not descend during inspiration 1 Normal 2 Leak in breathing system 1 If the fresh gas flow is greater than tidal volume the bellows may not descend 2 Check for leaks in drive gas circuit Are twin tube assemblies on the pneumatic engine lifted all the way into the interface cuff Ventilator will not turn on when remote on off Switch is turned on and AC LED is on 1 Machine interface harness 2 Remote on off switch 3 Power supply board 1 Ensure cable is plugged in properly at switch and CPU board J5 2 Replace switch 3 Replace power supply board Erratic pressure waveform Slow exhalation pressure release Mechanically delivered e Slight to moderate valve leakage O Ring Seal Housing to Main Manifold Alignment of seat and seal after assembly Loose mounting screws e Exhalation valve assembly Failure to cease Volume Compensation when 1 Check operation of drive gas check valve 2 Replace drive gas check valve 3 Inspect and reassemble the exhalation valve assembly make sure to put it together correctly 1 Go to Display 1 0 signals screen in Service volumes decrease significantly imme
193. l components front view references Item 2 3 4 5 6 7 8 10 11 12 13 14 15 16 1009 0541 000 02 05 Description Serial board AGSS gauge and sample return Vent Engine Housing Anesthetic Gas Scavenging System AGSS Breathing System Drawer Tabletop components Display cables Long arm Flowmeter components Auxiliary O5 Flowmeter Integrated Suction Regulator Front panel gauges and system switch ABS to machine Interface Components Vaporizer manifold Right side Components External components lower assembly 10 Illustrated Parts Section number Refer to section 10 31 Refer to section 10 31 Refer to section 10 22 Refer to section 10 28 Refer to section 10 19 Refer to section 10 10 Refer to section 10 7 Refer to section 10 31 Refer to section 10 32 1 Refer to section 10 16 Refer to section 10 30 Refer to section 10 29 Refer to section 10 5 Refer to section 10 17 Refer to section 10 15 Refer to section 10 8 Refer to section 10 9 10 7 Aespire 7900 10 4 External Components rear view Item 10 8 Description AC Inlet Pipeline Inlets Cylinder Gas Supplies Electrical Power Outlet Suction items Rear panel items Thumbscrew Ring retainer Stock Number Refer to section 10 11 Refer to section 10 13 Refer to section 10 14 Refer to section 10 12 Re
194. le Prin 4 for 20 Check flow sensors hoses for leaks consecutive seconds Perform flow sensor calibration Prin Is the baseline l Check ESIB to CPU cabling pressure during a breath Replace the ESIB board Alarm condition becomes false or transition from Replace the CPU board mechanical ventilation on to off Low VE high In range flow data VE lt low limit Check ventilator settings and volume output available and alarm Check the breathing circuit UME nOks mn Perform flow sensor calibration Alarm condition becomes false or volume alarms Replace the flow sensors state transition to standby or off i Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board Low VTE medium In range flow data VTE lt low limit Check ventilator settings and volume output available and alarm Check the breathing circuit and flow sensor limit not off connections Alarm condition becomes false or volume alarms Perform flow sensor calibration state transition to standby or off Replace the flow sensors Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board Manifold Minimum Cal failure at bootup or Check the breathing circuit Pressure Monitoring DPLswitch engaged and perform flow sensor calibration If calibration Sensor 7 8 Pmanitoia lt 80 cm H20 fails replace the ESIB Folie Check DPL switch for proper operation using the service mode Test press limit switch check If DPL switch test
195. le can be accessed by removing the rear panel 9 16 1 Front panel 1 method 3 4 C A suction black pilot a vacuum white N 1009 0541 000 02 05 Bleed all gas pressure from the machine Section 9 1 Ensure that all cylinder and pipeline gauges read zero before proceeding Remove the tabletop Section 9 3 Remove the gauge panel mounting screws and move the panel forward to access the suction control module Disconnect the tubing from the suction control module s Tube A from overflow safety trap suction Tube B from vacuum source e f venturi drive tube C from pilot valve adapter Remove the two mounting screws that hold the suction control module to the mounting bracket Transferthe mounting bracket to the new suction control module Reassemble in reverse order Perform the checkout procedure Section 3 9 41 Aespire 7900 9 16 2 Rear panel 1 Lowerthe upper rear panel Section 9 2 method 2 Disconnect the white A vacuum and black B suction fittings from the rear panel Do not remove the tubing from the regulator 3 If you are replacing a venturi drive suction control module disconnect the tube C from the pilot valve adapter oc Ss 4 c suction B F s 4 B D EX suction c ga vacuum A vacuum E 4 Remove the two screws D that hold the suction control module to the mounting bracket
196. librations For the 21 O calibration software reads the A D value for the O sensor when the O sensor is exposed to room air 21 0 e If this A D value is not within the tolerance the calibration fails If the calibration passes the A D value is stored in the EEPROM The sensor must be calibrated at 21 O before calibration at 100 O Oz Calibrations Directions for the 21 Oz calibration 1 Select the correct altitude using the System Configuration page 2 Remove Oz sensor from breathing system and expose to room air 3 Select Start 21 Oz Calibration to start the calibration 4 Reinstall O2 sensor upon completion of calibration Directions for the 100 Oz calibration 1 The 100 cal can only be performed after a 21 cal 2 With O2 sensor installed in the breathing system flaw 100 Oz 3 Select Start 100 Oz Calibration to start the calibration 4 Stop flow of 100 Oz upon completion of calibration Each calibration may take up to 3 minutes to complete Calibration Status Start 21 Oz Calibration Start 100 Oz Calibration Go to Service Modes Menu Remove the 02 sensor from the breathing system and expose it to room air The displayed reading should be 21 2 to pass the calibration requirements Reinstall the sensor that passed the 21 test in the breathing system and expose it to 100 02 Select Start 100 02 Calibration to begin test If it displays readings higher or lower than required to
197. llustrated Parts AB 74 067 1009 0541 000 02 05 10 53 Aespire 7900 10 28 Anesthetic Gas Scavenging System AGSS 10 28 1 Passive AGSS Items 1 through 12 are included in all AGSS kits Item Description Common Parts Stock Number 1 Seal Receiver Body 1407 3901 000 2 Reservoir 1407 3903 000 3 Seal and scavenging down tube 1407 3904 000 4 Thumbscrew M6x28 5 1406 3305 000 5 O ring 4 42 ID 9 65 OD 1407 3923 000 6 Thumbscrew M6x43 1406 3304 000 T Valve unidirectional negative pressure relief 1406 8219 000 Ta Seat Valve Negative Pressure 1406 3396 000 Tb Retainer disc 1400 3017 000 c O ring 20 35 ID 23 90 OD 1406 3397 000 Td Disc check valve 0210 5297 100 8 O ring 22 ID 30 OD silicone 1407 3104 000 9 O ring 21 95 ID 25 51 OD 1406 3558 000 10 Screw M4x8 9211 0640 083 11 Cap 3 18 Barb Silicone 1406 3524 000 12 Adapter auxiliary inlet 30 mm male to 30 mm male M1003134 13 Adapter auxiliary inlet 30 mm male
198. lot valve into the manifold body Set the mode switch to raise the plunger Adjust the pilot valve 9b so that the plunger actuates the pilot valve approximately half of its travel Tighten the jam nut 9c 1009 0541 000 02 05 10 61 Aespire 7900 10 29 3 Venturi assembly 10 62 Description C clip retainer Truarc Elbow fitting 4 mm Legris Cap Spoppet Seal u cup large Orifice Screen 150 mesh monel Seal u cup small Body Venturi Elbow fitting 8 mm Legris O ring large O ring small Check valve Bracket Venturi mounting Screw M5x20 BHSCS PT THD FORMING Cable tie Tubing Tygon Stock Number 1500 3158 000 1006 3663 000 1011 5002 000 1011 5001 000 1503 3090 000 1011 3508 000 1001 3808 000 1503 3089 000 1011 5000 000 1011 3509 000 1011 3510 000 9221 3032 116 1503 3108 000 1011 8002 000 1009 3182 000 1009 3384 000 0203 5915 300 Refer to section 10 25 02 05 1009 0541 000 10 30 Auxiliary 05 Flowmeter 1009 0541 000 02 05 2 3 Item Description 1 Flowmeter 1 10 L min Complete with fittings installed Flowmeter 1 10 L min without fittings 2 Knob gray 3 Set Screw 4 Nipple Panel Mount Auxiliary 05 Outlet 5 Label blank if no Auxiliary 02 6 Nut M12x1 75 SST EX Flowmeter Fitting 1 8 NPTM straight adapter Flowmeter Fitting 1 8 NPTM elbow adapter 8 Flowmeter Fitting Assembly 6 mm Tubing Adapter 9 Plate Flowmeter Mounting 10 Screw 10 32x 3 8 11 Screw M
199. lows will rise until the pressure equalizes The leak rate is equal to the flow needed to maintain 30 cm H30 e The leak rate should be less than 200 mL min 1009 0541 000 02 05 7 19 Aespire 7900 Test8 Testing the bellows assembly Note If required set up the Machine Test Tool and breathing system as shown in Test 7 1 Remove the bellows base manifold from the Bellows Module 2 Insert appropriate test plugs into the bellows base manifold as shown to the left Note Position the bellows assembly so that the bellows remain collapsed as you plug the ports 3 Connect the tapered plug of the Machine Test Tool to the bellows base inlet as shown to the left 4 Position the bellows upright with the bellows collapsed 5 Slowly increase the O flow to achieve 30 cm H50 Note The bellows will rise until the pressure equalizes e The leak rate is equal to the flow needed to maintain 30 cm H30 e The leak rate should be less than 200 mL min 7 20 02 05 1009 0541 000 1009 0541 000 02 05 7 Troubleshooting Test9 Testing the flow sensor module the circuit module and the soda lime canister Plug 1 Separate the Bellows Module from the Circuit Module and re install the Circuit Flow Sensor Module 2 Connect short tubing between the inhalation and exhalation ports of the breathing system 3 Insert an appropriate test plug in the outlet port of the Circuit Module 4 Enter the Service Mode Push and hold
200. lso change the drive gas selection on this service setup screen If the drive gas selection and the actual drive gas do not agree volumes will not be correct System Configuration Heliox Mode We Alarm Limits Language Optimal Screen Contrast Go to Service Modes Menu Figure 4 6 Drive Gas menu item 4 3 3 3 Heliox Mode Aespire 7900 machines can not be configured to deliver Heliox The Heliox Mode should be set to Off With the Heliox Mode Off the Setup Calibration menu will not include the Heliox option Altitude f Drive Gas Heliox Mode Ye Alarm Limits Language Optimal Screen Contrast Go to Service Modes Menu Figure 4 7 Heliox Mode menu item 1009 0541 000 02 05 4 9 Aespire 7900 4 3 3 4 VE Alarm Limits The setting for VE Alarm Limits determines how the VE Alarm Limits are set e f VE Alarm Limits is set to User Adjustable the user sets the limits on the Alarm Settings menu e f VE Alarm Limits is set to Automatic the ventilator software calculates the high and low VE alarm limits and sets them to 20 of the set VE The user is still ableto change the limits through the Alarm Settings menu in the Main Menu System Configuration User Adjustable Altitude Drive Gas Heliox Mode Ye Alarm Limits Language Optimal Screen Contrast Go to Service Modes Menu Figure 4 8 VE Alarm Limits menu item 4 10 02 05 1009 0541 000 4 Self Tests and Service Mode 4 3 3
201. m o ring 10 Reinstall the front flowmeter panel shield 11 Perform the checkout procedure Section 3 1009 0541 000 02 05 Aespire 7900 9 8 3 Remove 1 Remove the rear panel Section 9 2 complete 2 Disconnectthe tubing at the rear of each gas module The following example is a flowmeter head back view ofthe flowmeter head Fresh gas out N50 in Air in 0 supply switch Fresh gas out for single tube flowhead 3 Disconnect the 05 supply switch harness Note position of switch connections so that you can reassemble correctly later 4 Remove the front flowmeter panel shield Section 9 8 1 5 Remove the mounting screw from each regulator manifold 6 Pull the flowhead forward 7 To reinstall perform the previous steps in reverse order pull on the tubing to ensure itis locked into the fittings 8 Check for proper alignment of the front flowmeter panel If any of the needle valve knobs rub against the flowmeter panel reposition the flowhead to allow for proper clearance 9 Perform the checkout procedure Section 3 9 14 02 05 1009 0541 000 9 8 4 Replace flowmeter modules 05 Air modules Note 1009 0541 000 02 05 9 Repair Procedures 1 Remove the complete flowmeter head Section 9 8 3 2 Refertothe following illustrations Note thatthese illustrations show ANSI flowmeter module positions The order is reversed in ISO machines O Air flowmeter mo
202. m switch to Standby 3 8 02 05 1009 0541 000 3 9 Low pressure leak test Note A WARNING 3 9 1 Negative low pressure leak test ACGO Outlet 1009 0541 000 02 05 A WARNING 3 Checkout Procedure Perform either the Negative low pressure leak test or the ISO or BSI standard low pressure leak test It is not necessary to perform both tests Do not use a system with a low pressure leak Anesthetic gas will go into the atmosphere not into the breathing circuit 1 o A WwW N T 8 Testthe leak test device a b C d a b C d Putyour hand on the inlet of the leak test device Push hard for a good seal Squeeze the bulb to remove all air from the bulb Ifthebulb completely inflates in less than 60 seconds replace the leak test device Setthe system switch to Standby Setthe ACGO selector switch to ACGO Turn off all vaporizers Testthe anesthesia machine for low pressure leaks Open the flow controls one and a half tums counterclockwise Connectthe test device to the ACGO outlet Compress and release the bulb until it is empty The vacuum causes the floats to move This is usual If the bulb completely inflates in 30 seconds or less there is a leak in the low pressure circuit Test each vaporizer for low pressure leaks Set the vaporizer to 1 Repeat step 5 Set the vaporizer to OFF Test the remaining vaporizers Disconnect th
203. m the module WEITER um E 1L T T T i p j TE E 9 12 02 05 1009 0541 000 9 Repair Procedures A WARNING Floats are calibrated to a specific tube Keep each float with its tube Replace tube and floats together Interchanging floats can cause incorrect readings Disassemble the flowtube assemblies only when service is required Excessive cleaning can remove the antistatic coating from inside the tube Damage to the float requires replacement of the entire flowtube 3 9 Disassemble the flowtube assembly Spring O ring Float Stop rd Float stops are indexed to zs flowtubes and to flowtube modules by gas x Tabs and slots at both E connections must be Tube E m aligned to install Er flowtubes Float Filter O ring a Completely clean rinse and dry the flowtube Use hospital grade alcohol and a flowtube brush Replace stops filter and o rings as necessary Lightly coat all o rings with Krytox Be careful to not get any Krytox on the bottom of small flowtube float stops Reassemble the flowtube assembly Insert the flowtube spring side first into the top of the module with the scale oriented forward Push up and slide the bottom of the flowtube into place on the bottom o ring It may be necessary to rotate the tube to engage the index tabs Note Be sure 0 rings are inserted completely into the collar Push down on the tube to seat the botto
204. ms the calibration as follows 1 Opens the flow valve to the high pressure starting point where manifold pressure is 91 92 cm H30 Waits forthe pressure to stabilize Oncethe pressure is stabilized sets the flow to a predetermined level Waitforthe pressure to stabilize oa A C N Repeat steps 1 4 replacing step 3 with progressively smaller flows There are 12 points that are calculated forthe bleed resistor calibration If the calibration passes the calculated bleed resistor calibration points are stored in EEPROM Ifthe bleed resistor calibration test fails check altitude and drive gas settings Ensure that the breathing circuit gas is exhausting out the scavenging port during the test A negative finding indicates a massive circuit leak Check for proper regulator pressure calibration Ensure that the Flow Valve Cal test was conducted properly Otherwise failure indicates a calibration problem with the flow valve 4 33 Aespire 7900 4 3 24 Service Calibrations Required The Schedule Service Calibrations menu lists which setting or calibration must be performed when the Service Calibration A alarm appears in normal operation After the setting or calibration is properly completed the text for that setting or calibration is removed from the list Service Calibrations Required amp The selections on this menu are the Calibrations Settings that are required when the Service Calibration A alarm is active P
205. n 7 2 Breathing System Leak Test Guide 1009 0541 000 02 05 1 Troubleshooting Does bellows return to top of canister Proceed to Breathing System Leak Troubleshooting Yes Perform All Calibrations and Re evaluate Check Hospital pressure supply Hospital pressure OK Yes No vem operation of GIV heck Replace inlet filter if necessary Correct Hospital supply problem Proceed to Breathing Circuit Leak Troubleshooting AB 29 096 Aespire 7900 7 7 5 High intrinsic PEEP troubleshooting Problem Verify pass continues Calibrate Flow Transducer was out of der s Section 4 3 20 Yes Proceed to naccurate Volume Ventilation Troubleshooting Section 7 7 3 Flow from bleed orifice with Bag Vent _ Intrinsic PEEP switch in Bag in both Bag and mode Vent modes Intrinsic PEEP in Vent mode only Replace Flow Control Valve APL Valve Problem i Scavenging Problem or Bnalaton Popoffyalve Problem Breathing Circuit Obstruction Check bellows pop off valve for 1 Check Hospital s scavenging for proper function accurate assembly or sticking hoses and supply vacuum active 1 Check APL valve mechanism 2 Check APL disk for sticking Check exhalation valve for 2 Check filter on active systems DU i accurate assembly or sticking i Cneck UD Tf or APL or M 3 Check for obstruction in breathin in Y manifold Check for obstructions in
206. nal functions SIB Connector 7 Vop MONITOR Power Supply Connector Bus access control signals for all memory and peripheral devices e Interrupt handling e Clocks and timers for the system Background software development mode e Two RS232C serial 1 0 ports e Baud rate generator for serial ports Hard power up and soft watchdog error reset generation Data bus buffers Memory and 1 0 decoding Program memory Safety Relevant Computing SRC Watchdog system e Data acquisition s Flow valve control e Inlet valve drive Front panel interface Audio alarm e Regulator output manifold pressures 02 05 1009 0541 000 Serial communications module Memory and 1 0 decoding Timer modules 1009 0541 000 02 05 2 Theory of Operation System clock An external 32 768 kHz crystal is used with the internal clock synthesizer to generate a 24 12 MHz system clock Periodic interrupt timer The periodic interrupt timer is the time base for the Real Time Operating System Software watchdog timer The software controlled internal watchdog timer guards against program execution going astray External bus interface The external bus interface handles the transfer of information between the CPU32 external memory and peripherals Timing reference An external 3 6864 MHz clock oscillator is used as the timing reference for the Baud Rate Generator Configuration Both of the s
207. nds independent of processor interaction and a cyclic soft reset continues until the error is corrected or the system is powered down DATA acquisition The data acquisition system for the Aespire 7900 Ventilator consists of two major building blocks The first is an analog to digital converter ADC system and the second is a digital to analog converter DAC system This portion of the Aespire 7900 Ventilator allows the microprocessor to interface with valves and pressure transducers The data acquisition system is also used for internal monitoring of safety relevant signals The ADC system is designed to meet the following specifications Resolution 12 Bits Input Voltage Range 0 4 095 Volts 1mV LSB Number of Channels 24 Total Conversion Time 8 to 8 63 usec max Integral Nonlinearity 1 LSB max Differential Nonlinearity 1 LSB max guaranteed monotonic Full Scale Error 6 LSB max Unipolar Offset Error 3 LSB max The DAC system is designed to meet the following specifications Resolution 12 Bits Number of Channels 1 Settling time to 0 01 30 usec max Output Voltage Range 0 4 095 Volts 1mV LSB Integral Nonlinearity 1 LSB max Differential Nonlinearity 1 LSB max guaranteed monotonic Full Scale Error 9 LSB max Zero Scale Error 4 LSB max 1009 0541 000 02 05 2 31 Aespire 7900 2 32 Analog to digital converter System A 24 cha
208. nds locate and correct the leak 1 13 Aespire 7900 Test2 Low pressure leak testing the machine o NO oO A C 7 14 Remove the breathing system from the machine Attach the Machine Test Tool using only the Thru Port and the low pressure leak test device to Port 3 of the breathing system interface as shown above Note To prevent damage to the airway pressure gauge ensure that the gauge port Port 1 is not connected to the Test Tool Set the ACGO selector switch to ABS Setthe system switch to Standby Turn off all vaporizers Open the flow controls one and a half turns counterclockwise Compress and release the bulb until it is empty The vacuum causes the floats to move This is usual Ifthe bulb completely inflates in 30 seconds or less there is a leak in the low pressure circuit 02 05 1009 0541 000 7 Troubleshooting Test3 Testing the airway pressure gauge and Port 1 and Port 3 u cup seals Alignment Post 1 Attach the Machine TestToolto the breathing system interface ports using the alignment post as shown above 2 Turnall ofthe flow controls fully clockwise minimum flow 3 Setthe system switch to On 4 Occlude the tapered plug s At minimum flow the airway pressure gauge reading should increase f not there is a leak in the tested circuit 1009 0541 000 02 05 1 15 Aespire 7900 Test4 Testing the bag port cover the APL valve the Bag
209. ness from CPU to task light harness Support plate with seal Service Kit Standoff 4 40 DSUB Lockwasher Grommet horseshoe Cables Stock Number 1006 8285 000 Refer to section 10 1 1 1503 3045 000 1503 3074 000 1006 4258 000 1009 6125 000 1006 4261 000 1006 4260 000 1009 6076 000 1009 8459 000 1202 3092 000 0144 1104 331 1406 3203 000 Refer to section 10 27 02 05 1009 0541 000 10 Illustrated Parts 12 10 11 13 13 1009 0541 000 02 05 10 41 Aespire 7900 10 21 Display Module 10 21 1 Rear housing parts Item 12 13 14 15 16 10 42 Description Speaker assembly with leads Connector board Harness connector board to front panel board 50 pin Rear housing vent control display Bracket connector board mount Screw 2 56 x 5 16 PAN PH HD SST rear panel DB connector 2 Screw M3 x 8 Sems 11 Ground wire Stock Number 1503 3106 000 1006 3682 000 1503 3052 000 1006 1242 000 1006 1322 000 0140 6110 105 0140 6219 130 1009 3453 000 02 05 1009 0541 000 10 21 2 Front housing parts AB 29 072 FERETE Item Description 3 Harness connector board to front panel board 50 pin 4 Harness display keyboard with ferrite 20 pin 5 Knob soft touch teal green 6 Rotary encoder with cable and mounting hardware 7 Keyboard front panel vent control display 8 EL display 9 Front housing vent control display 10 Nut Keps M4 keyboard display mou
210. ng these instructions in reverse order T Perform the Checkout Procedure found in Section 3 8 Allow the battery to charge 9 58 02 05 1009 0541 000 9 23 5 Replace CPU cables Removing the raceway 1009 0541 000 02 05 9 Repair Procedures The four cables from the top edge connectors of the CPU board pass into the pan area through a cable raceway Display cable Vent engine cable ESIB cable Machine switches cable splits into three segments To replace these cables you must remove the tabletop Section 9 3 1 Remove the four screws that hold the raceway plate to the pan 2 Slidethe plate to the left to release the raceway 3 If replacing more than one cable place the display cable A and the ESIB cable B in the raceway in the order shown The remaining cables can occupy the inner slots in any order Insure that all ferrites are below the pan A B 4 Slide the mounting plate into the side slots of the raceway 5 Place the raceway overthe right edge of the pan Secure the plate to the pan 6 Reassemble in reverse order 9 59 Aespire 7900 9 24 Servicing the Vent Engine 9 60 The Vent Engine is found in a housing located below the breathing system bellows assembly The Vent Engine includes the following subassemblies s Vent Engine Connector board 1 s Gas Inlet Valve Assembly 2 s Inlet Filter 3 located under the gas inlet valve e Inlet Valve S
211. nister ports in the Circuit Module as shown above 3 Slowly increase the O flow to achieve 30 cm H50 e The leak rate is equal to the flow needed to maintain 30 cm H50 e The leak rate should be less than 200 mL min 7 22 02 05 1009 0541 000 7 Troubleshooting Test12 Testing the inspiratory side of the circuit module Plug Note If required set up the machine as in Test 10 and 11 1 Connect the Circuit Test Tool to the Circuit Module as shown above 2 Insert an appropriate test plug in the inspiratory outlet to the canister as shown above 3 Slowly increase the O flow to achieve 30 cm H30 e The leak rate is equal to the flow needed to maintain 30 cm H50 e The leak rate should be less than 200 mL min 1009 0541 000 02 05 1 23 Aespire 7900 Test13 Testing the negative pressure relief valve 1 Separate the Bellows Module from the Circuit Module 2 Remove the Bellows Interface Manifold 3 Inserttest plug recessed end into the rear Bag Vent switch port as shown 4 Install the Bellows Module 5 Connect the Machine Test Tool to the interface ports and the Bellows Module as shown above 6 Set the Bag Vent Switch to Vent T Slowly increase the O flow to achieve 30 cm H50 The leak rate is equal to the flow needed to maintain 30 cm H50 e The leak rate should be less than 200 mL min 7 24 02 05 1009 0541 000 1009 0541 000 02 05 1 Troubleshooting Test 14 Testing the flow sensors only
212. nnel multiplexer and buffer amplifier precedes the A D converter The manifold pressure patient pressure inspiratory flow and expiratory flow signal inputs to the multiplexer are filtered with an antialiasing filter Other inputs are filtered by low pass filters Signals that are monitored by the ADC system include s Patient Pressure Manifold Pressure Inspiratory Flow Sensor Expiratory Flow Sensor Flow Current sense Flow DAC output e Inlet Valve Current sense O Concentration Power Supplies Battery Backup system The ADC system is based around a 12 bit A D converter It operates from 15V power supplies except for the A D converter The 12 bit converter is powered by a filtered 5V supply and protected from over voltage Multiplexer and buffer amplifier The multiplexer settles quickly within 8 u sec to 0 01 to be stable for the ADC 12 Bit conversion and to maintain the overall 20 u sec conversion time The system bandwidth requirement is from dc to 20Hz The multiplexer is an 8 channel fault protected device and the amplifier used as a buffer to drive the A D converter AD822AR A D converter The MAX191BCWG is a 12 Bit converter that operates from a single 5 Volt power supply The clock frequency to run the A D converter is 1 507 MHz It is derived from the microprocessor system clock With a 1 507MHz clock the conversion time of the A D converter is 13 clock periods or 8 63 y sec The MAX191BCWG h
213. ns Interface The SIB provides the interface to the flow sensor EEPROMs Each flow sensor incorporates an EEPROM that contains calibration data to be used by the ventilator software to correct for the linearity error of the flow sensor This data relates an ADC reading to a flow value The flow value integrated over time allows the system to calculate volume The SIB also provides 5 volt power at up to 10mA to the flow sensor EEPROMSs The 5 volt power supply incorporates a shutdown control to allow the CPU Board to power down the flow sensor EEPROMs when not communicating with them A MAX488 receives a differential clock signal from the CPU Board and converts it to a single ended clock to the flow sensor EEPROMs The power and communication signals to the flow sensors are filtered for EMI protection and clamped to protect against ESD Inspiratory and Expiratory Flow Measurement Differential pressure levels in the range of 3 5 cm H50 to 3 5 cm H50 are applied to the differential pressure transducers by the flow of gasses past the variable orifice in the flow sensor The range of 3 5 cm H20 corresponds to 120 LPM of flow through the variable orifice flow sensors The output range of the transducer is 0 3 to 3 8 VDC with a zero pressure output of 2 05 VDC The pressure transducer is powered by a 4 096 VDC voltage reference and is amplified by an instrumentation amplifier with a nominal gain of 370 The instrumentation amplifier gain is adjusta
214. nsors ssssssessee 2 44 3 Checkout Procedure 3 1 Ventilator post service checkout 0 n 3 2 3 2 Inspectthe system asic vulcs cies Sade RR E vada ea Rte x E RR Deke od erate 3 2 3 3 Pipeline and cylinder tests 0 ccc cece eee ence eee tenet eens 3 3 JA Flow control tests iuc ices RR eter eens eb Rr ties wae Cs 3 4 3 5 Pressure reliefit st 5l ches bl et ARS G eee 4 ug e ede aan el ied 3 6 3 6 Oz Supply alarMteSt coi cent eg oe cece cee xk mn mde ek ER Ie ra ween 3 6 3 P Fl shiflow test 2 e tank Sek bed Aad Seana a tee ages Par 3 7 3 8 Vaporizer back pressure test 0 ee eee 3 8 02 05 1009 0541 000 1009 0541 000 02 05 Table of Contents 3 9 Low pressure leak testi psr css ele rh n Sheet eee ede bes gh ae on 3 9 3 9 1 Negative low pressure leak test 20 0 cece cece eee teens 3 9 3 9 2 ISO or BSI standard low pressure leak test 0 0 cece eee eee 3 10 3 10 Alam tests csse bay ea pex Reem et eee ee eine eth date wenden a eae EERA 3 12 3 11 Breathing system tests 0 0 cece een teen eens 3 14 3 12 Auxiliary O2 flowmeter tests 0 cece eee eee eee aeee 3 16 3 13 Integrated Suction Regulator tests 0 cece cece eee eee eens 3 16 3 14 Power failure test ccc civ tes ee Rr gar er kR ees n CREER EAD 3 17 3 15 Electrical safety tests 1 1 cessa ed ead na cee eg ed ed eda iene 3 17 4 Self Tests and Service Mode AT Seltt sts reor uU ee Gace ha See By
215. nt 7 11 Nut Keps M3 display mount 4 1009 0541 000 02 05 10 Illustrated Parts Stock Number 1503 3052 000 1605 3072 000 1006 4622 000 1503 3012 000 1006 1325 000 1503 8010 000 1006 1241 000 0144 3717 314 0144 3717 302 10 43 Aespire 7900 10 22 Vent Engine Housing 10 44 Item o oo 1 0 0 A CO h2 FP e e e mn o 25 U N e O Description Vent Engine Cover Plate Assy TAB GUIDE BELLOWS BASE SCR M3X16 POSI DR PAN HD A4 SST Cap Plug FITTING PNL MOUNT 3 18 HOSE BARB UNION PLUG HOLE 15 9 DIA NYLON MICRO PLASTICS PLATE CONN VENT SCR M4X8 POZI DR DIN84 PAN SERRATED Harness Vent Engine Board to Connector Plate Vent Engine Standoff Screwlock 4 40 Bracket scavenging guard in machines without scavenging CLIP SUCTION BAG HOSE SCR M5 X 16 PAN PH HD SST Lockwasher 13 14 15 Stock Number 1407 7009 000 1407 3313 000 1504 3003 000 1406 3524 000 1504 3014 000 1006 1473 000 1407 3321 000 1006 3178 000 1009 6077 000 Refer to section 10 23 1202 3092 000 1407 3922 000 1407 3327 000 9211 8350 163 0144 1118 220 02 05 1009 0541 000 a gt ND N 10 23 Vent Engine 2 pin me connector 2 pin connector 1009 0541 000 02 05 Item 1a 1b 1c 1d 1e 1f 1g 1h 1i Description Vent Engine Assembly Service Aespire 7900 Gas Inlet Valve GIV components Solenoid 3 way NO 5 Volt Screw M1 6x14 Retaining rin
216. nt of the tabletop one screw is at the right corner of the tabletop one is near the O Flush button To access the remaining two screws C you must remove the ABS one screw is atthe left corner of the tabletop one is near the APL Valve 1009 0541 000 02 05 9 5 Aespire 7900 9 4 Replace pipeline inlet filter 1 2 9 4 1 Replace 1 pipeline inlet 5 check valve 9 6 Remove the pipeline inlet fitting Pullthe pipeline inlet filter out ofthe fitting The o ring should come out with the filter Install the new pipeline inlet filter in the pipeline inlet fitting The new filter comes with an o ring Remove the rear panel Section 9 2 Remove the pipeline inlet fitting The Airand O pipeline manifolds include a drive gas connection at the back of the manifold Remove the drive gas tube or plug to access the check valve From the back of the pipeline manifold use a thin tool to push out the check valve For an N50 manifold you will have to carefully apply pressure at the outlet of the manifold with a syringe for example to gently force the check valve out of the manifold Push the new check valve into the opening using the same thin tool The new check valve includes an o ring orient ittoward the pipeline inlet Note Make sure to push the new check valve all the way back into the opening until it bottoms out on the shoulder Install the pipeline inlet fitting
217. nual ventilation must be continued until the ventilator resumes normal operation or an alternate ventilator anesthesia system can be used 1 27 1 28 Aespire 7900 7 4 System Error Log The Error Log Section 4 3 2 displays up to 10 of the most current error messages that have been logged Error messages include Minimum Monitoring alarms that stop mechanical ventilation s Minimum System Shutdown alarms that stop mechanical ventilation and monitoring To troubleshoot Error Log messages refer to Section 7 5 Alarm Messages 02 05 1009 0541 000 7 5 Alarm messages 1 Troubleshooting The Service Mode includes a log of the most recent Alarm messages Section 4 3 1 experienced by the ventilator system If a User Alarm persists after the recommended action has been performed the Service Repair column indicates the probable component and related circuit that needs repair Use the Service Mode tests to isolate the fault For messages that begin with Ventilate Manually and are followed by a specific message referto the specific alarm message For numbers in parentheses preceded with an asterisk X see the applicable footnote at the end of the table Message Alarm type Enabling Criteria Alarm Condition Service Repair Priority Removal Criteria 15V Analog Minimum Voltage Check the 15 V supply from service mode Out of Shutdown out of range under Display A D channels Verify that the Rang
218. nute the test device must stabilize between 60 DIN 372 400 kPa 54 58 psi 50 Pin Indexed 310 341 kPa 45 0 49 5 psi fthetest device pressure does not stabilize within one minute replace the cylinder supply Ifthe test device stabilizes within one minute but the readings are not within specifications readjust the regulator Section 5 1 3 Slowly open the cylinder valve Set the system switch to On High Flow Test Set the flow control valve to the maximum indicated flow on the flow tube e The test device reading must be greater than 60 DIN 221 kPa 32 psi 50 Pin Indexed 221 kPa 32 psi Ifthe test device reading under high flow conditions is less than specified readjust the regulator perthe procedure in Section 5 1 3 however set the regulated pressure higher by the difference you noted in this step plus 7 kPa 1 psi This adjusts the low flow regulated output to the high side of the specification so that the high flow regulated pressure can fall within the specification Ifthe regulator subsequently fails the low flow specification step 4 because the reading is too high replace the cylinder supply Set the system switch to Standby Close the cylinder valve Bleed the system of all pressure Disconnect the test device and plug the test port pull on the plug to ensure it is locked in the fitting Replace the rear panel s Perform the checkout procedure Section 3
219. odule from the Circuit Module and re install the Bellows Module 2 Enterthe Service Mode Push and hold the adjustment knob on the ventilator s display and setthe system switch to On a Selectand confirm Service Mode b Select and confirm Breathing System Leak Test Section 4 3 12 3 Follow the instructions on the screen Atstep 6 connect the Machine Test Tool to the interface ports as shown above instead Continue with steps 7 8 and 9 on the screen e The leak rate should be less than 200 mL min A l y rete Select notan Leak Tet 18 start Tee beat 5 Yeng rot the kie ledere ai s to amp Decks the paient Gril al i coatin T Sony increase fresh gas fios until Fressaes Gauge eris 30 cm HD Laak ria im Hs heri gar Dea rece ip minim 3 em zl 53 Press leva bo end dest Go ta Terme Modes 7 18 02 05 1009 0541 000 7 Troubleshooting Test 7 Testing the bellows the bellows pop off valve the bellows base manifold and the Bag Vent switch 1 Separate the Bellows Module from the Circuit Module Insert appropriate test plugs into the bellows base manifold as shown to the left Note Position the bellows assembly so that the bellows remain collapsed as you plug the ports Set Bag Vent switch to Vent Position the bellows upright with the bellows collapsed Connect the Machine Test Tool to the interface ports as shown above Slowly increase the O flow to achieve 30 cm H50 Note The bel
220. olenoid 4 Drive Gas Regulator 5 Flow Control Valve 6 s Reservoir 7 e Drive Gas Check Valve 8 e Interface Manifold 9 To replace any of the Vent Engine components you must first remove the Vent Engine from the housing referto Section 9 24 1 02 05 1009 0541 000 9 Repair Procedures 9 24 1 To remove 1 Disconnect pipeline supplies close cylinder valves bleed off pressure the Vent Engine Remove the ABS breathing system Remove the Exhalation valve Remove the scavenging downtube a A WwW N Loosen the five captive screws A that hold the Vent Engine cover to the housing Raise the cover to access the Vent Engine 6 Disconnect the Vent Engine harness B 7 Disconnect the white tube coupler C inline with tube to manifold pressure transducer on the Ventilator Interface Board 8 If present disconnect the black tube coupler D inline with tube to AGSS flow indicator 9 Disconnect the drive gas hose E 10 Loosen the three captive screws F that hold the engine manifold to the housing 11 Liftthe Vent Engine out of the housing 12 To replace the Vent Engine reassemble in reverse order 1009 0541 000 02 05 9 61 Aespire 7900 9 24 2 Replacing Vent Engine components Gas Inlet Valve A Inlet Filter B Regulator C Interface Manifold D Drive Gas Check Valve E Inspiratory Flow Valve F Reservoir G Inlet Valve Solenoid H
221. ollar Collar stop must be on CCW side of valve stop Ro 8 Carefully pull the collar back so there is a slight gap between collar and the valve body but still engages the valve stop Collar Setscrew example 9 Tighten the collar setscrews Start with the one opposite the tab if possible 10 Turn the valve stem counterclockwise at least one revolution to make sure the collar tab clears the valve stop K Stop must clear If the stop does not clear a Turn the valve stem back to minimum position b Loosen the collar setscrews c Repeat steps 6 through 9 11 Turn the valve stem clockwise to the minimum stop 12 Verify that the flow is within the s 50 25 mL min range for dual tube flowmeters s 200 25 mL min range for single tube flowmeters 13 Calibrate the Link proportioning system Section 5 4 1009 0541 000 02 05 5 9 Aespire 7900 5 3 2 N50 Needle Valve Calibration Minimum Flow 5 10 A WARNING CAUTION You must be in a well ventilated room or use a gas evacuation device at this time Anesthetic vapors exhausted into the room air can be harmful to your health Do not force the needle valve againstthe seat Overtightening the valve can cause the minimum flow setting to drift out of specifications 1 2 Disconnect all pipeline supplies and close all cylinder valves Remove the upper rear panel Note If adjusting an existing needle valve remove the N50 and O knob and sprocket
222. omagnetic compatibility EMC It is important to protect the ventilator from conducted and radiated Electromagnetic Interference EMI and from Electrostatic Discharge ESD In addition EMI design precautions are taken to control the emission of EMI via cabling and access ports There are two RS232C interfaces Each channel is configured for full duplex asynchronous operation at communication rates up to 19 2k baud The isolated interfaces help eliminate the possibility of ground loops The RS 232 inputs and outputs completely conform to all EIA RS 232C and CCITT V28 specifications 02 05 1009 0541 000 2 Theory of Operation 2 6 5 Enhanced The Enhanced Sensor Interface Board ESIB is the link between the flow transducers the patient airway pressure transducer the manifold pressure transducer the oxygen ensor Interface Board ESIB sensor the Drive Pressure Limit switch and the ventilator CPU board The ESIB also passes through various switch positions to the ventilator CPU Board It provides an interface for the ACGO switch the Bag Vent switch the canister release switch control panel cover switch ABS On Off in the Aespire 7900 CO bypass switch wired On in the Aespire 7900 and breathing circuit ID switches in the Aespire 7900 the circuit ID switches are wired to a special configuration so that software knows itis an ABS circle system All of the switch signals are filtered for EMI immunity and protected against ESD R
223. on 4 3 23 s Perform the Checkout Procedure found in Section 3 Even if these settings appear to be set correctly they must be deliberately changed and set back to their proper setting 02 05 1009 0541 000 9 23 3 Power supply A CAUTION 1 Line power 2 Chassis ground 3 Power output 1009 0541 000 02 05 9 Repair Procedures The circuit boards are electrostatic sensitive Use an anti static workstation and wear a wrist grounding strap when handling a circuit board e Mis a Tun AU Ee 4 Disconnect the line power inlet connector 1 and the ground wire 2 5 Disconnect the power outlet connector 3 6 Remove the two nuts that hold the power supply assembly to the mounting plate of the electrical enclosure T Transfer the power supply mounting bracket to the new power supply 8 To install a new power supply follow the removal instructions in reverse order 9 Perform the Checkout Procedure found in Section 3 9 57 Aespire 7900 9 23 4 Battery The battery is mounted on the back plate of the lower electrical enclosure 1 Battery cable 2 Battery 3 Battery retainer 4 Disconnect the battery cable by pressing the lock tabs on either side of the connector and gently pulling on the connector 5 Remove the battery The battery is held in place with a formed bracket To replace the battery remove the two screws that retain the bracket 6 Install a new battery by followi
224. on 9 24 3 f the voltage is less than 4 5 volts replace the CPU board Section 9 23 1 02 05 1009 0541 000 4 Self Tests and Service Mode 4 3 8 Test Flow Valve To test the flow valve the software starts by closing the flow valve It then opens the flow valve in increments until the flow valve is completely open At each of the settings of the flow valve the A D Analog Digital channel for Flow DAC Digital to Analog Converter Feedback and Flow Current Sense will be read If the A D for the Flow DAC Feedback and Flow Current Sense are not within the correct tolerance the test fails After setting the Bag Vent switch to Vent disengage the drive gas from the breathing system by removing the bellows housing Test Flow Valve Directions for Flow Valve Test 1 Set Bag Vent switch to Vent 2 Remove the bellows canister 3 Select Start Test to perform the test 4 When test is complete replace the bellows canister Go to Service Modes Menu Figure 4 17 Test Flow Valve menu Flow Valve Test FAIL A failure can be caused either by the drive circuit or a flow valve malfunction instructions Go to the Flow Valve Test Tool menu to check the drive circuit for proper voltage output Setthe flow control to output 120 liters per minute Unplug the connector from the pneumatic connection board and measure the resistance between the leads atthe unplugged flow valve connector A multimeter should read approximately 1 75 ohms
225. ont flowmeter panel shield 14 Perform the checkout procedure Section 3 1009 0541 000 02 05 9 21 Aespire 7900 9 8 9 Replace 0 or N50 needle valves on machines with N50 A WARNING 9 22 For machines without N50 refer to Section 9 8 10 for replacing the O needle valve 1 2 3 4 5 6 T 10 11 12 Bleed all gas pressure from the machine Section 9 1 Ensure that all cylinder and pipeline gauges read zero before proceeding Remove the front flowmeter panel shield Section 9 8 1 Set the O5 and N50 needle valves to their minimum position Loosen the set screws on the N50 knob then remove the knob Loosen the set screws on the N50 sprocket and the O knob To remove grasp the O5 knob sprocket N50 sprocket and chain as an assembly Remove as an assembly Remove the spacer from the N20 needle valve spindle Loosen the set screws on the needle valve stop collar forthe needle valve that is being replaced Remove the stop collar To remove the needle valve from the flowmeter block turn the needle valve counterclockwise with a 16 mm wrench To install the new needle valve turn it clockwise and tighten it with the wrench Note Be sure the o ring is properly located on the tip of the needle valve The O5 and N50 needle valves are not the same Patient injury can result if the wrong needle valve is installed in the flowmeter block You can identify the N20 needle valve by a groov
226. ort To reassemble perform the previous steps in reverse order 10 Perform the checkout procedure Section 3 02 05 1009 0541 000 9 Repair Procedures 9 8 8 Replace 1 Remove the front flowmeter panel shield Section 9 8 1 secondary 2 Remove the complete flowmeter head Section 9 8 3 regulator manifold 3 Separate the flowmeter modules Section 9 8 4 or balance regulator manifold 4 Remove the flowmeter frame from the regulator manifold by removing the four screws at the rear of the regulator manifold no need to remove flowtubes 5 Remove the needle valve from the regulator manifold a Unscrew the complete assembly together stop collar needle valve b Replace the o ring if necessary 6 Screw the needle valve into the new regulator manifold T Remove the plugs and balance regulator elbow fitting and O supply switch if an 03 module from the old regulator manifold 8 Install the plugs and balance regulator elbow fitting and O supply switch if an O module into the new regulator manifold pull on the plugs and fittings to ensure that they are locked into the manifold 9 Reinstall the flowmeter frame to the regulator manifold 10 Reinstall all the flowmeter modules to the flowmeter head 11 Reinstall the flowmeter head Section 9 8 4 12 Do the necessary calibrations Section 6 Necessary calibrations Section Secondary Regulator 5 2 05 minimum flow 5 3 1 Link system 5 4 13 Reinstall the fr
227. ort occluded the gauge should return to 100 mm Hg 13 kPa within a tolerance of x 10 mm Hg 1 3 kPa Occlude the patient port of the suction regulator Setthe vacuum regulator gauge to 100 mm Hg 13 kPa Tum the mode selector switch to O OFF and observe the gauge needle It must return to the zero range bracket or stop pin within 10 seconds Turn the mode selector switch to O OFF Rotate the suction control knob a minimum of two full turns in the clockwise direction increase suction to ensure its setting is not at the off position Occlude the patient port of the suction regulator Observe the suction gauge the needle should not move Rotate the suction control knob fully counterclockwise to ensure its setting is at the fully off position Turn the mode selector switch to ON Observe the suction gauge the needle should not move 02 05 1009 0541 000 1 Troubleshooting In this section 7 1GeneralTroubleshooting ssssssssssss Rm 7 2 7 2 Breathing System Leak Test Guide 0 cece cece een eens 7 4 1 2 1 Breathing system leaktest sss 7 5 1 2 2 Breathing System Troubleshooting Flowcharts ccc ee eee eee eee 7 7 22 3 Leak SOlatlON Tests uos Lederle ea e e Glee cat by eee Rn 7 12 7 3 Ventilator Troubleshooting instructions 0 c cece eee eee 7 27 FA System Error LOE orn fete ged e excel RUNE Rr Y Ree ond GRE Paar 7 28 4 5 Alarmimessages o0cice ve
228. ou first remove the display arm from the dovetail extrusion Before replacing the display arm note the routing of the cable After replacing the display arm ensure that the cable is dressed properly and does not interfere with the motion of the display arm If equipped remove additional equipment from the arm before removing the arm 1 Remove the cable connector cover from the display Disconnect the cable 2 Remove the display from the display arm 3 Remove the cable from the cable clamps 4 Loosen the screws that secure the display arm in the dovetail 5 If required use a rubber mallet to tap the display arm out of the dovetail 1 Remove the three screws that hold the dovetail extrusion to the upright Remove the extrusion to allow cable replacement 2 To access the cable routing for replacement remove e the rear upper panel Section 9 2 1 e the lower electrical enclosure access panels Section 9 2 2 e the tabletop Section 9 3 and the cable raceway retainer plate Section 9 23 5 under the tabletop 3 After replacing the cable place the cable in the notch shown 4 Install the dovetail extrusion loosely to hold the cables in place 5 Adjust the cable length outside the a9 om machine to approximately 60 cm 6 Securely tighten the extrusion mounting screws 9 47 Aespire 7900 9 20 3 Installing 1 Place the arm into the extrusion the long arm 2 U
229. ough to fall into the breathing system Make sure that there are no test plugs or other objects caught in the breathing system Remove the ABS breathing system Plug the inspiratory flow drive pressure port of the exhalation valve with a stopper Exhalation valve Plug Inspiratory Flow Drive Pressure Port Setthe system switch to On and enter the Service Mode Select Flow Valve Test Tool Set Bag Vent switch to Vent Select Set Flow Valve Setflow of 10 L min Carefully listen forthe MOPV relief weightto be relieving and popping off from its seat a purring sound This indicates the valve is functioning correctly Setthe system switch to Standby Remove the stopper from the inspiratory flow port Reassemble the system 10 Perform the Preoperative Checkout Procedure refer to the User s Reference manual 6 7 Aespire 7900 6 5 Auxiliary 0 flowmeter tests Flow Accuracy Test 6 8 Open the O cylinder valve or connect an O pipeline Rotate the flow control clockwise decrease to shut off the flow The ball should rest at the bottom of the flow tube and not move Rotate the flow control counterclockwise increase The ball should rise immediately after rotation is begun It should rise smoothly and steadily with continued counterclockwise rotation When a desired flow is set the ball should maintain in a steady position Rotate the flow control clockw
230. ow and make sure the O concentration is in the allowed range Note Allow the O5 monitor to stabilize At the lower flows the O monitor may take up to 90 seconds to stabilize e f you overshoot a setting turn the O needle valve clockwise until the N50 flow decreases to the previous setting before continuing the test Set the N50 flow L min Measured 05 0 8 22 to 29 1 22 to 29 2 22 to 29 6 22 to 29 9 22 to 29 5 20 02 05 1009 0541 000 5 Calibration 20 Check the proportioning system concentration decreasing O flow Observe the following precautions e Turn the N50 needle valve to the maximum setting Adjust only the O needle valve Decrease the O flow as specified in the table and make sure the 05 concentration is in the allowed range Note Allow the O monitor to stabilize At the lower flows the O5 monitor may take up to 90 seconds to stabilize f you overshoot a setting turn the N20 needle valve counterclockwise until the O flow increases to the previous setting before continuing the test Set the 0 flow L min Measured 0 3 22 to 29 2 22 to 29 1 22 to 29 0 3 22 to 29 If both tests meet the criteria calibration is complete go to the next step If either test fails to meet the criteria return to step 10 and adjust N50 to a lower or higher setting If Then Concentration Low Decrease N50 Concentration High Increase
231. ow sensor is downstream of the gas system inspiratory check valve Feedback from the inspiratory transducer is used to supply tidal volumes that make allowances for the effects of fresh gas flow and circuit compressibility The expiratory flow sensor is located atthe inputto the gas system expiratory check valve Feedback from the expiratory flow sensor is used to supply signals for expiratory tidal volume monitoring and the breath rate Expiratory Gas Monitor Flow Sensor Inspiratory Flow Sensor gt 7 Manifold re Tran Pressure rans Bp FowTans 33 Figure 2 31 Flow sensors 02 05 1009 0541 000 In this section A WARNINGS 1009 0541 000 02 05 3 Checkout Procedure 3 1 Ventilator post service checkout 0 ccc cece eect eee n 3 2 3 2 INSPECTING System oo ERE IE ede v SES EX MOOD KE Mi ats 3 2 3 3 Pipeline and cylinder tests 0 cece cece eee eee ete e nee eens 3 3 3 4 Flow coritrolitests 1 cree pee ek tor err emo E Weta nels dae RR ca 3 4 S Pressureeliertesb us nd aer Ica RR RR RR PERDE RAS S ERR AE TR RI RO tn RE 3 6 3 6 05 supply alarm test ere me Rn ERR RR webs EUER 3 6 Se FLUSH TOW NESE i5 miento eet Rab see ge ater susti e e Fed e d AR T ea 3 7 3 8 Vaporizer back pressure test 0 eee cence eee teen e 3 8 3 9 Low pressure leak teSt 0 cece tenet IH 3 9 3 9 1 Negative low pressure leak test 0c ccc cece tene
232. pass replace the sensor 4 29 Aespire 7900 Figure 4 31 Calibrate Flow Sensors menu 4 30 4 3 20 Calibrate Flow Sensors Remarks The software calibrates the inspiratory flow expiratory flow airway pressure and manifold pressure transducers for zero flow pressure offset voltage It does so by reading the A D values for inspiratory flow expiratory flow airway pressure and manifold pressure when the flow sensor module has been disconnected from the bulkhead connector If the A D values are not within the correct tolerance the calibration fails If the calibration passes the offset A D values at which the inspiratory flow expiratory flow airway pressure and manifold pressure transducers were calibrated at are stored in the EEPROM Calibrate Flow Sensors Directions for Calibrating Flow Sensors 1 Remove flow sensor module from the breathing system 2 Select Start Cal to start the calibration 3 Replace flow sensor module upon completion of calibration Calibration Status Go to Service Modes Menu Fail indicates a problem with the ESIB Inspect the Bulkhead Connector and ESIB tubing for moisture or possible occlusion Check for bad differential pressure transducer e Ensure that the flow sensor module is disconnected from the bulkhead panel Check the transducer outputs using the Display A D menu f the transducer is out of tolerance Refer to Table 4 1 on page 4 23 replace the ESIB assembly
233. plug the power cord and set the system switch to standby Remove the vaporizers before tipping the machine If a vaporizer is inverted it must be set to 5 and purged for 30 minutes with a 5 L min flow The interlock system prevents purging more than one vaporizer at a time 2 Remove the absorber the vaporizers gas cylinders drawers and all auxiliary equipment To prevent damage do not tip the Aespire machine more than 10 degrees from vertical 3 Blockthe opposite wheels then block up the machine until there is enough room to remove the defective caster To block up the machine tip and slide blocks under the caster base Raise both sides evenly until the unit is high enough to remove the caster 4 The casters are threaded into the base AM and held with a Loctite compound Remove the caster with an appropriately sized open end wrench 5 Ifrequired clean the threads ofthe new caster with denatured alcohol 6 Apply Loctite 242 to the threads of the new caster Install the caster securely into place 7 Make sure the caster turns freely 8 Carefully lower the machine to the floor 9 Perform the checkout procedure Section 3 9 45 Aespire 7900 9 19 Replace task light and switch Remove the four screws A that hold the task light lens to the upper shelf 9 19 1Toreplace 1 the task light switch 9 19 2 To replace 1 the task light circuit board 2 3 4 5 9 46 Using a small needle nos
234. ply A D count is not in range remove ESIB to CPU cable and recheck the counts If not in range replace the CPU board If 12V ESIB Supply A D count is in range replace the ESIB to CPU cable orthe ESIB Medium pressure control else low Pres Control Mode NOT Avail Ventilator not fully functional and pressure control mode not available Alarm condition becomes false Check the breathing circuit and flow sensor connections Check the flow sensors for proper connection Perform flow sensor calibration Replace the flow sensors Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board 1 38 02 05 1009 0541 000 1 Troubleshooting Message Alarm type Enabling Criteria Alarm Condition Service Repair Priority Removal Criteria Pres Vol UserAlarm Outlet selection switch Mon Inactive is set to auxiliary gas outlet Connect the patient circuit to the auxiliary gas outlet or set the switch to the common gas outlet for normal operation Pressure Minimum A pressure safety switch Ventilate manually Check control settings Limit Switch Monitoring activated ata Paw 90 Monitoring is still Refer to Troubleshooting Flowcharts i STEAM And ETUR cote Hid ps Section 7 7 5 High intrinsic PEEP 80 cmH50 i troubleshooting may cause this alarm Replace O2 low Sensor connected 05 lt 5 Verify O calibration has been done correctly Sensor Do
235. ption Stock Number Qty Oo ON DO FP CO MN BS e e e N e O 13 Exhalation Valve Assy BASE EXHALATION VALVE DIAPHRAGM ASSY EXH VALVE SEAT EXHALATION VLV ABS COVER EXHALATION VALVE SCR M4X16 PH PAN HD SST TYPE 316 O RING 2 9 ID 6 46 OD 1 78 W EP 70 DURO SCR THUMB M6X43 10MM HEAD B S O RING 4 47 ID X 8 03 OD 1 78 W EPR 70 DURO RETAINER DISK 26 97D 12 7H 0 76T SST FLUTTER V WEIGHT DEAD 10 CMH20 BCG PASSIVE AGSS SEAT POSITIVE PRESS BCG VALVE PASSIVE AGSS O RING 0D19 16 BCG ID15 6 EPDM DURO 70 016 RING RETAINING 19 05 SHAFT DIA SST Lubricate sparingly with Krytox 1407 7005 000 1407 3700 000 1503 8121 000 1407 3704 000 1407 3701 000 9211 0440 163 1407 3409 000 1406 3306 000 1407 3703 000 1400 3017 000 1406 3572 000 1406 3571 000 1006 3616 000 1406 357 7 000 02 05 1009 0541 000 aaa a YN N OU CO S 10 19 7 Bellows 1009 0541 000 02 05 Item 2 3 4 5 6 7 8 Description Bellows housing Bellows Rim Pressure relief valve assy Latch base Seal base Base bellows Manifold bellows base 10 Illustrated Parts Stock Number 1500 3117 000 1500 3378 000 1500 3351 000 1500 3377 000 1500 3352 000 1500 3359 000 Refer to section 10 19 8 1407 3702 000 10 37 Aespire 7900 10 19 8 Bellow base Item Description Stock Number 1 Bellows Base Assy 1407 7006 000 1a Latch Assy 1407 7007 000 2 HOOK LATCH 1407 3604 000 3 E Ring 0203 5225 300 10 38 02 05
236. r supply modules A WARNING 9 6 1 Tightening procedure for high pressure tube fittings Note 9 6 2 Replace primary regulator module complete replacement 9 8 Be careful not to expose internal components to grease or oil except Krytox or equivalent The cylinder pressure gauge is connected to the cylinder supply through a copper tube with fittings at both ends Use the following tightening procedure whenever you are replacing a cylinder supply or a cylinder pressure gauge 1 2 3 Insert the tubing into the fitting until the ferrule seats in the fitting Tighten the nut by hand Continue tightening the nut with a wrench until it reaches the original position about 1 4 turn You will feel an increase in resistance at the original position After reaching the original position tighten the nut just slightly If you are installing a new tube that has not been tightened before tighten the nut with a wrench an additional 3 4 of a turn afterthe nut is finger tight Oo coc F C N Remove the three mounting screws and To reassemble perform the previous Checkthe output of the regulator Bleed all gas pressure from the machine Section 9 1 Ensure that all cylinder and pipeline gauges read zero before proceeding Remove the rear panel Section 9 2 Disconnectthe high pressure cylinder gauge fitting Disconnectthe output tube fitting lockwashers steps in reverse order e Tighten th
237. ra digital manometer to the ACGO outlet using the positive pressure leak test adapter Adjust the O flow to 0 5 L min Test Adapter Verify that the test device reading stabilizes within the following range 31 60 kPa 230 450 mm Hg 4 5 8 5 psi Remove the test device and the adapter Setall flow controls to 3 L min Stop the O supply Disconnect the pipeline supply or close the cylinder valve Make sure that The low O supply alarm occurs a b The N50 if equipped and O flows stop The O flow stops last c Air if equipped flow continues d Gas supply alarms occur on the ventilator if the ventilator uses O as the drive gas Turn all of the flow controls fully clockwise minimum flow Reconnectthe pipeline supplies 02 05 1009 0541 000 3 7 Flush flow test Possible Causes of Failure 1009 0541 000 02 05 3 Checkout Procedure 1 Set the Bag Vent switch to Vent Setthe system switch to Standby Attach a patient circuit and plug the patient port Set the ACGO selector switch to ABS Ensure that the bellows is completely collapsed oO 0 P Q M Measure the amount of time it takes to fill the bellows when the O Flush button is fully and continuously depressed 7 Repeat the above measurement two more times deflate bellows by removing the plug from the patient port e The bellows should fill in 1 8 to 2 3 seconds e Large leak if long filling time
238. rated CPU board All the power necessary to operate the ventilator and light package comes from the power ciruits The digital circuits controls the operation of the ventilator A 12 volt battery provides backup power to operate the ventilator in case of mains power failure AC Power Outlets Isolation Universal Transformer AB 74 088 Power Supply Fuses Line Filter Task Light Integrated CPU Board Proprietary RS232C Download 9 Primary R852320 Vent On Standby Switch 9 02 Supply Switch and 02 Flush Switch BCID 9 Connector Board Pneumatic Engine Patient Interface Harness gt ACG0 Oxygen Sensor 9 Enhanced Sensor Interface Board Figure 2 13 Aespire 7900 Ventilator functional block diagram Integrated CPU 2 22 02 05 1009 0541 000 2 Theory of Operation 2 5 2 Control The control panel on the Aespire 7900 Ventilator is mounted on a folding arm on the panel and display leftside of the machine It permits you to grip the panel and push the control buttons with your thumbs The control module ventilator display includes four submodules The electroluminescent EL display The keyboard front panel Arotary encoder Aspeaker AB 90 025 Figure 2 14 Ventilator control panel The keyboard and rotar
239. ration sssesessssseeeee In 5 17 5 5 Airway pressure gauge sssssssssssss Inn 5 22 5 5 1 Zero the pressure SUSE eee 5 22 5 5 2 Checking the pressure gauge accuracy cece eee eee ees 5 23 5 1 Aespire 7900 5 1 Primary Regulators Follow the procedure in Section 5 1 1 to gain access to the regulators Then in Section 5 1 2 select the test that is appropriate for the regulator you are testing AX WARNING When testing adjusting N50 regulators nitrous oxide flows through the system Use a safe and approved procedure to collect and remove it 5 1 1 Test setup AN WARNING Wear safety glasses while test device is connected to the test port A CAUTION Becareful notto plugthe output of the primary regulator without having a pressure relief valve in the output circuit 1 Setthe system switch to Standby 2 Disconnect all pipeline supplies 3 Remove the upper rear panel Section 9 2 4 Ifequipped turn the auxiliary O flowmeter control fully clockwise no flow 5 Install a full cylinder in the cylinder supply to be tested It is essential that the cylinder be within 1096 of its full pressure 6 Remove the plug from the test port and connect a test device capable of measuring 689 kPa 100 psi Remove Plug 5 1 2 Testing Primary There are two variations of the test procedure for the primary regulators Regulators Test A For primary regulators that
240. rocedure T Open the O flow control and set a total flow of 0 4 L min through the flowmeter on the test device 8 Make sure that the pressure gauge on the test device reads zero and that all other flow controls are fully closed 9 Close the needle valve on the test device until the test gauge reads ISO 5358 3 kPa BSI 4272 3 20 kPa 10 If the flow through the test device is less than 0 35 L min ISO or 0 3 L min BSI there is a low pressure leak in the anesthesia machine 11 Fully open the needle valve on the test device to decrease the back pressure 12 Test each vaporizer for low pressure leaks a Setthe vaporizer to 1 b Repeat steps 7 through 10 c Turn the vaporizer OFF d Test the remaining vaporizers 13 Remove test tool and adapter A WARNING Agent mixtures from the low pressure leak test stay in the system Always flush the system with O after the low pressure leak test 1 L min for one minute Turn all vaporizers OFF at the end of the low pressure leak test 14 Flush the system with 0 Set the system switch to On Set the O flow to 1 L min Continue the O flow for one minute Turn the O flow control fully clockwise minimum flow ococop Setthe system switch to Standby 1009 0541 000 02 05 3 11 Aespire 7900 3 10 Alarm tests 3 12 1 2 3 4 8 9 10 Connect a test lung to the patient connection Set the Bag Vent switch to Vent Set the system switch
241. rom the microcontroller board to the front panel assembly EL display controller The S MOS SED 1351F flat panel display controller drives 480 horizontal pixels by 240 vertical pixels of the EL display Ferrite beads filter the signals from the display controller to the display Video display memory This memory consists of one high speed 32K x 8 CMOS static RAM directly connected to the display controller The video memory is mapped into memory space but access is controlled by the display controller to ensure that the EL display is not disturbed during an access by the processor Membrane switch inputs These signals are electronically debounced by an RC filter and sampled by the 68340 processor LED driver outputs The AC ON LED is turned on directly from the AC power applied Rotary encoder input This quadrature signal is debounced and routed to a quadrature clock converter which interrupts the 68340 processor at each detent position The circuit consists of a programmable sound generator and a LM4860M audio amplifier The sound generator interfaces directly to the CPU and the audio amplifier drives an 8 ohm speaker It is normally powered from the low dropout regulator using the 5 8 V supply In the event of a loss of the 5 8 V supply the sound generator will be powered by the VDD supply to prevent loading of the processor data bus The external interface of the ventilator is an important design task from the standpoint of Electr
242. rotection s Proprietary hose connections and fixed manifolds 10 VA electrical power limiting to potential oxygen enriched environment 150 psi burst overpressure protection 02 05 1009 0541 000 2 Theory of Operation 2 5 Aespire 7900 Ventilator components Components of the ventilator are found in different locations on the Aespire Anesthesia Machine The ventilator package consists of 1 Control Module Ventilator Display 2 Pneumatic engine 3 Enhanced Sensor interface board ESIB 4 Ventilator control electronics 980vL8V V N N Figure 2 12 Location of 7900 ventilator components 2 21 1009 0541 000 02 05 Aespire 7900 2 5 1 Ventilator control electronics 100 120 VAC 220 240 VAC 50 60 Hz AC Inlet Voltage Specific Line Filter System Breaker Inrush Board Battery Connector Board Control Module Ventilator Display The ventilator control electronics is found in the lower electrical enclosure at the rear of the Aespire 7900 machine The ventilator control electronics includes a universal power supply and the integrated CPU board The CPU board includes the regulated power circuits and the digital circuits The universal power supply receives AC power from the machine s AC Inlet module through the isolation transformer inline fuses and separate line filter It converts AC power to raw DC power that feeds into the power supply circuits of the integ
243. rs are good If either sensor indicates a flow where there is none there may be a leak To troubleshoot reduce the circuit pressure back to zero Reverse the flow sensor connections at the ESIB interface panel and repeat the above tests 6 Ifthe problem follows the sensor discard the sensor It has a leak 7 Ifthe problem stays with the same side of the circuit it is likely the leak is in the tubing not with the sensor The software prompts the user to perform the procedural steps to calibrate the flow valve This is an automated calibration It gradually opens the flow valve and monitors the manifold pressure When the manifold pressure reaches 1 9 to 2 0 cm H20 the value at which the flow valve has been opened is saved The flow valve is then closed The value at which the flow valve was opened to isthen checked to make sure itis within the correcttolerance If it is not the calibration fails If the calibration passes the flow valve calibration point is stored in the EEPROM Calibrate Flow Valve Directions for flow valve calibration 1 Select the drive gas using the system configuration menu 2 Select the altitude using the system configuration menu 3 Set the fresh gas flow to 10 L min 4 Set Bag Vent switch to Yent 5 Occlude the patient circuit at the Y connector 6 Select the Start Cal selection and push the rotary encoder switch Calibration Status Go to Service Modes Menu Check that the Bag Vent s
244. rt or plug the bag port d Set the Bag Vent switch to Bag e Adjust the APL valve to minimum Connect the pipeline supplies or slowly open the cylinder valves Turn all flow controls fully clockwise minimum flow Setthe ACGO selector switch to ABS Turn on the system Confirm that the O sensor measures 21 in room air and 100 in pure 02 If not calibrate the O sensor Make sure that Fora dual tube O flowmeter the O flowtube shows 0 025 to 0 075 L min Fora single tube O flowmeter the O flowtube shows 0 175 to 0 225 L min e The other flowtubes show no gas flow Setthe flow controls to mid range of each flowtube and make sure thatthe flowtube floats rotate and move smoothly If the system does not include N30 skip steps 9 and 10 Check the Link proportioning system concentration increasing N50 flow Observe the following precautions a Start with all valves atthe minimum setting b Adjust only the N20 flow control c Increase the N20 flow as specified in the following table and make sure the O concentration is in range 02 05 1009 0541 000 3 Checkout Procedure Note Allow the O5 monitor to stabilize At the lower flows the 03 monitor may take up to 90 seconds to stabilize d If you overshoot a setting turn the O flow control clockwise until the N50 flow decreases to the previous setting before continuing the test Set the N50 flow L min 0 15 dual flowtu
245. ry CPU board Battery UserAlarm Battery voltage gt 16V The system continues to If persists replace Failure High for 10 seconds operate but may fail battery CPU board 7 30 02 05 1009 0541 000 1 Troubleshooting Message Alarm type Enabling Criteria Alarm Condition Service Repair Priority Removal Criteria Battery UserAlarm The battery voltage is The battery does not If persists replace Failure Low too low lt 7 V to supply have enough chargeto battery the system if power power the equipment if CPU board fails power fails Leave the system plugged in to charge the battery Cal Flow User Alarm The last flow sensor This alarm message indicates thatthe last flow Sensors calibration failed sensor s differential pressure transducer Calibrate the flow sensors Look for waterin the Calibration failed flow sensor tubes Dry if necessary With the BTV switch in Bag ensure sensors are removed until the No Insp No Exp flow sensor message appears If persists replace Check for moisture e Refer to Troubleshooting Flowcharts Section 5 5 CalibrateO2 low Sensor connected Offset slope or cell Calibrate the O sensor Sensor voltage not in range or If calibration fails replace the O sensor 0 gt 11096 If calibration still fails replace the ESIB board Successful calibration of sensor Canister User Alarm This alarm should not If occurs check open occur in Ae
246. ry has been on charge for several hours and you get a battery is not charged display Checkthe battery in line cable fuse f the fuse is good the battery is bad and you should replace it 4 25 Aespire 7900 4 3 16 Test Panel Switches Remarks Figure 4 26 Test Panel Switches menu 4 26 In the Test Panel Switches menu the software is set up to receive keyboard button presses and rotary encoder turns Press each button and turn the encoder one full turn in both directions When a button is pressed and held the icon on the screen next to the button will contain an x After testing all the buttons and the control knob select Test Encoder Knob Turn As you turn the encoder knob verify that e each click of the encoder in the clockwise direction increments the clockwise total e each click of the encoder in the counterclockwise direction increments the counterclockwise total If any of the select buttons test fails replace the front panel keyboard assembly Section 9 22 1 If the encoder knob test fails replace the rotary encoder assembly Section 9 22 2 Test Panel Switches Directions for testing panel switches 1 Press and hold each button and knob on the panel 2 Verify that each button highlights on the screen and that an appears when the button or knob is pressed 3 Select Test Encoder Knob Turn 4 Turn the encoder knob counterclockwise and clockwise Eu 5 Verify th
247. s 9 49 9 21 2 Replacing a display cable 0 cece eect eee eee eens 9 49 9 21 3 Installing the folding Mount 0 cece eee eee 9 50 9 22 Aespire 7900 Control Display module 0 cece eee eee eens 9 51 9 23 Electrical enclosure components ccc eee eee eee eee ene eens 9 54 9 23 4 Battely x ce sick hod cas Bg ner RR Soa tte Ra ead cent ape Gee 9 58 9 23 5 Replace CPU cables oce deka dew rx ee RYE 9 59 9 24 Servicing the Vent Engine 0 0 cece II 9 60 9 24 1 To remove the Vent Engine cece cece teenies 9 61 9 24 2 Replacing Vent Engine components 00 c cece eee eee 9 62 9 24 3 Replacing GIV components ccc cece eee eee eee ne 9 63 02 05 1009 0541 000 1009 0541 000 02 05 Table of Contents 10 Illustrated Parts 10 1 Sevicetools eo rrt ett Rn ERR x a ce ct eben es 10 3 10 1 1 S0fDW8T6 s EAE Rie Pade Ged expel cer gs AE DETAN ERA a 10 3 10 1 2 Secondary regulator pilot pressure tool isses 10 3 10 1 3 Test Devices iles eR RM ere er nd 10 4 10 1 4 Lubricants and Adhesives ssssseessese I 10 4 10 1 5 T stTOOlS 5i nope debet td evi t dr RU ate ise te t qe 10 5 10 2 External components front VieW 1 cece eect eee eee eens 10 6 10 3 External components front view references 0 cece cece eee aaee 10 7 10 4 External Components rear view cece eee III 10 8 10 5 Front panel gauges and system switch
248. s Dale wes to DM d cable from ESIB to CPU board Circle patient circuit Limit Task UserAlarm The system is running Light Use on battery power No action is required Turn off the light to save power Loss of UserAlarm The audio alarm will not Monitor system Replace the CPU board Backup sound for a CPU failure operation Audio Low Battery UserAlarm Voltage is 11 65V Manually ventilate the Make sure power is connected and circuit Voltage while using battery patient to save power breaker is closed Check ventilator fuse power Low Drive User Alarm The ventilator did not Manually ventilate the Make sure that the appropriate gas supplies Gas Pres detecta rise in internal patient 05 or air are connected and pressurized pressure when the flow valve opened Low 02 high In range O data 0 lt low limit Check O limit Is actual O lower than limit available Alarm condition becomes false or enabling criteria becomes false setting Verify O calibration has been done correctly Does calibration pass If calibration does not pass replace 05 sensor If there is still a calibration problem replace the ESIB board 1009 0541 000 02 05 7 35 Aespire 7900 Message Alarm type Enabling Criteria Alarm Condition Service Repair Priority Removal Criteria Low Paw high In range Paw data Peak airway pressure lt Check the breathing circuit for leaks availab
249. s every 24 months All machine and ventilator parts should be replaced before performing the checks tests and calibrations 1 Replace the internal backup battery Section 9 23 4 Stock Number 1503 3045 000 2 Replace the free breathing flapper valve Section 6 3 Stock Number 0211 1454 100 3 Replace the free breathing valve o ring Section 6 3 Stock Number 1503 3208 000 6 5 Aespire 7900 6 3 Free breathing valve maintenance To replace the flapper valve 6 6 Unscrew the valve seat A from the side of the interface manifold Inspect the flapper B and valve seat for nicks debris and cleanliness If necessary clean the new flapper valve with alcohol Pull the tail C of the new free breathing valve flapper through the center of the valve seat until it locks in place Trim the tail flush with outside surface of the valve seat refer to the removed flapper Replace the O ring D Lubricate with a thin film of Krytox Hand screw the assembly into the interface manifold Reassemble the system Perform the Preoperative Checkout Procedure refer to the User s Reference manual 02 05 1009 0541 000 6 Installation and Maintenance 6 4 MOPV pressure relief valve test A WARNING 6 4 1 Test setup 6 4 2 Test procedure 1009 0541 000 02 05 Objects in the breathing system can stop gas flow to the patient This can cause injury or death O o A C N e Do not use a test plug that is small en
250. s in Section 9 22 1 Pull the control knob off the encoder shaft Disconnect the encoder harness from the back of the keyboard panel Remove the mounting nut and flat washer using a 14 mm wrench Gently pull the encoder switch from the keyboard panel Place a lock washer on the shaft of the new encoder switch NO 01 FP C MN e Align the shaft of the new encoder switch with the hole in the front panel circuit board push it through and place a flat washer on the encoder shaft 8 Replace the mounting nut using a 14 mm wrench 9 Replace the knob 10 Assemble in reverse order 11 Perform the Checkout Procedure found in Section 3 02 05 1009 0541 000 9 22 3 Alarm speaker 9 Repair Procedures 1009 0541 000 02 05 To replace the alarm speaker 1 To access the speaker follow the disassembly instructions in Section 9 22 1 Remove the two screws holding the alarm speaker to the housing 2 3 Install the new alarm speaker using the previously removed screws 4 Assemble in reverse order 5 Perform the Checkout Procedure found in Section 3 9 53 Aespire 7900 9 23 Electrical enclosure components Sow 9 54 A WARNING A CAUTION A CAUTION Integrated CPU board Power supply Battery Battery connector Disconnect the power cord from the outlet receptacle before attempting to remove or repair any circuit board to avoid shock hazard Disconnect the internal battery before attempting
251. s input the drive circuit outputs O to 1 0 Amps typical into a 3 ohm load This current is passed to the flow valve and is used to proportionally control the flow valve during mechanical ventilation This circuit does not require adjustment and is accurate within 2 of full scale This circuit also limits the flow valve output to less than 10VA under normal operation and under a single fault condition This is a requirement of the international regulation IEC 601 2 13 A signal proportional to the actual drive current is input to the A D converter to permit the processor to monitor the current and detect fault conditions This circuit consists of a low dropout regulator providing a regulated 5 Volts to the inlet valve when enabled by the microprocessor The SHUTDOWN pin of the regulator provides on off control This regulator has an output current of 250mA It has an internal current limit of 530mA max This keeps the output under 10VA in a single fault condition A current sensing circuit is included to let the processor monitor the inlet valve current via the A D converter system and detect fault conditions 2 33 Aespire 7900 Front panel display interface Audio alarm External interface Communication interface RS232C 2 34 All signals to and from the Front Panel are protected from ESD through the use of transient suppression devices and appropriate filtering All of these signals are routed through a single connector f
252. s oct ges Sa Spe eee ay RSD eee ee ee DASS ee 2 20 2 5 Aespire 7900 Ventilator components 00 cece cece nn 2 21 2 5 1 Ventilator control electronics ccc cece ee eee eee e eee eee 2 22 2 5 2 Control panel and display 0 c cece cece eens 2 23 2 5 3 Enhanced Sensor Interface Board ESIB cece eee eee eens 2 24 2 5 4 Pneumatic Vent Engine 2 24 2 6 Electrical i2 oet RT RC MA E a a EV EE e ORE TEPS AS 2 25 2 6 1 Block diagram 2 ed cet bb oet anid et ede x ee acero ed 2 25 26 2 Power sUpply ccs chus tex hir mr T A Wea ERES ER va eds 2 26 2 6 3 Sealed lead acid battery 2 21 2 6 4 CRU assembly iens anna Ere a p Gu eter dX A p e PLA 2 28 2 6 5 Enhanced Sensor Interface Board ESIB 2 00 c cece eee eee eee 2 35 2 7 Ventilator mechanical subsystems ccc cece eee eee eee anes 2 39 2 7 1 Drive gas filter and Gas Inlet Valve 0 cece cece eee 2 39 2 1 2 Pressureregulator 5 ra ane Wasa ene db a ux d e Re ae os 2 40 24 3 Flow control valve eeepc te e aa vedas ad ES RR EE V NER 2 40 2 7 4 Drive Gas Check Valve DGCV 0 cece eect eee eee 2 41 2 7 5 Bellows Pressure Relief Valve ccc cece eee eee eee eens 2 41 2 7 6 Exhalation valve sianed icc nett enna 2 42 2 7 7 Mechanical Overpressure Valve 0 cece eee eee eens 2 43 2 7 8 Reservoir and bleed resistor 2 43 2 79 Free breathing valve ooo ry Re va c Ende e du d 2 44 2 7 10 Breathing circuit flow se
253. s small enough to fall into the breathing system e Make sure that there are no test plugs or other objects caught in the breathing system 02 05 1009 0541 000 7 2 1 Breathing system leak test A WARNING Check Valves Ventilator Bellows Service Mode Tests 1009 0541 000 02 05 1 Troubleshooting This test checks for leaks in Vent Mode and Bag Mode components It is part ofthe overall checkout procedure Section 3 11 Breathing system tests It is repeated here fortesting convenience Objects in the breathing system can stop gas flow to the patient This can cause injury or death e Donotuse a test plug that is small enough to fall into the breathing system 1 Verifythat AGSS is operating For systems that have a flow indicator on the side make sure that the flow indicator shows a flow in the green normal region 2 Zerothe pressure gauge Section 5 5 1 3 Make sure that the check valves on the breathing circuit module work correctly a The Inspiratory check valve rises during inspiration and falls at the start of expiration b The Expiratory check valve rises during expiration and falls at the start of inspiration 4 Ventilator bellows test a Setthe system switch to Standby b Setthe Bag Vent switch to Ventilator c Setall flow controls to minimum d Close the breathing circuit at the patient connection Use the test plug located on the side of the ABS Push the O flush button to fill
254. se a rubber mallet to tap the arm into place Leave a 12 mm gap between the lower edge of the arm mounting plate and the end of the dovetail 3 Tighten the mounting screws to secure the display arm 4 Remount the display 5 Route the display cable neatly through the cable clamps 1 Cover 2 Rectangular washer 3 Mounting screw 4 Ensure that the cable is secured so that it does not interfere with the display arm through the entire range of motion 9 48 02 05 1009 0541 000 9 Repair Procedures 9 21 Replace the display cable folding mount 9 21 1 Removing the folding mount 9 21 2 Replacing a display cable 1009 0541 000 02 05 Display cable replacement requires that you first remove the folding mount from the dovetail extrusion Before replacing the folding mount note the routing of the cable After replacing the folding mount ensure that the cable is dressed properly and does not interfere with the motion of the display arm 2 1 Remove the display from the display iz j arm o 88 Loosen the screws that secure the xi display arm in the dovetail If required use a rubber mallet to o a tap the display arm out of the am dovetail Ex To access the cable routing for After replacing the cable place the Install the dovetail extrusion loosely 1 Adjustthe cable length outside the Securely tighten the extrusion Remove the cable connector cover from the di
255. se damage to the equipment Read and follow all warnings and cautions Other symbols replace words on the equipment or in Datex Ohmeda manuals No one device or manual uses all of the symbols These symbols include On power Off power Standby Standby or preparatory state for part of the equipment ON only for part of the equipment OFF only for part of the equipment Direct current Alternating current Protective earth ground Earth ground Frame or chassis ground Equipotential 1009 0541 000 02 05 gt e P gt A XJ AA PHO Alarm silence button Alarm silence touch key Tec 6 Type B equipment Type BF equipment Type CF equipment Caution ISO 7000 0434 Attention refer to product instructions IEC 601 1 Dangerous voltage Electrical input Electrical output Pneumatic input Pneumatic output 1 7 Aespire 7900 ut 0 REF Plus positive polarity Minus negative polarity Variability Variability in steps This way up Lamp lighting illumination Lock Unlock Close drain Open drain remove liquid Autoclavable Not autoclavable Inspiratory flow O sensor connection Stock Number I c os E Y Xx L9 Movement in one direction Movement in two directions Read top of float Vacuum inlet Suction bottle outlet Cylinder Isolation transformer Linkage system Risk of Explosion Low pressure leak
256. sensor Insp Reverse medium Flow 1 In range flow data available in mechanical ventilation Negative flow on inspiratory sensor during expiration in circle system Two consecutive breaths measured with correct flow seen by flow sensors Check flow sensor connections for No Flow Sensor alarm Check the breathing circuit Perform flow sensor calibration Check insp exp check valves Replace the flow sensors Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board 1 34 02 05 1009 0541 000 1 Troubleshooting Message Alarm type Enabling Criteria Alarm Condition Service Repair Priority Removal Criteria Inspiration high Drive gas safety switch Check the breathing circuit Stopped engaged Check ventilator flow output 2 3 SAM Perform flow sensor calibration Perform the pressure limit switch test in the service screen If test fails replace the ESIB board or ESIB to CPU cabling If problem persists replace the CPU board Internal Minimum Ventilator malfunction Ventilate manually Replace the CPU board Ventilator Shutdown Monitoring is not Clock Too 5 reliable Fast 6 Internal Minimum Ventilator malfunction Ventilate manually Replace the CPU board Ventilator Shutdown Monitoring is not Clock Too 5 reliable Slow 6 Invalid UserAlarm In the Aespire 7900 the Check Circuit input to the ESIB is harness to ESIB Mogul
257. specifications readjust the regulator Section 5 1 3 5 Slowly open the cylinder valve 6 Enter the Service Mode Push and hold the adjustment knob on the ventilator s display and set the system switch to On 7 Select and confirm Service Mode 8 Select and confirm Flow Valve Test Tool 9 Select and confirm Set Flow L min 1009 0541 000 02 05 5 3 Aespire 7900 5 4 Test B 10 High Flow Test Rotate adjustment knob counterclockwise to obtain 11 12 13 14 15 16 1T 65 L min While watching the test device press confirm s After 2 seconds Set Flow to 0 L min and press confirm to stop the gas flow s The minimum test device reading observed must be greater than 60 DIN 221 kPa 32 psi 50 Pin Indexed 207 kPa 30 psi Repeat this step three times If the test device reading under high flow conditions is less than specified readjust the regulator per the procedure in Section 5 1 3 however set the regulated pressure higher by the difference you noted in this step plus 7 kPa 1 psi This adjusts the low flow regulated output to the high side ofthe specification so that the high flow regulated pressure can fall within the specification If the regulator subsequently fails the low flow specification step 4 because the reading is too high replace the cylinder supply Setthe system switch to Standby Close the cylinder valve Bleed the system of all pressure
258. spire 7900 harness to ESIB The open connector sets the canister switch signal cable from ESIB to CPU board to closed by default Cannot Drive UserAlarm The internal manifold Check the breathing circuit for leaks or hose Bellows pressure is higher than occlusions Paw tolerance Perform flow sensor calibration Fill the bellows if empty Check the drive gas check valve Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board Cardiac User Alarm The cardiac bypass Bypass option is selected Alarm limit menu Use the alarm limits menu to change this setting Check Flow medium In range flow data No or negative flow on Check flow sensor connections for No Flow Sensors 1 available in mechanical insp sensor during Sensor alarm ventilation inspiration in a circle system or negative flow on exp sensor in expiration Inspiratory and or expiratory flow sensor s are connected Two consecutive breaths measured with correct flow seen by flow sensors Check the breathing circuit Perform flow sensor calibration Check insp exp check valves Replace the flow sensors Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board 1009 0541 000 02 05 7 31 Aespire 7900 Message Alarm type Enabling Criteria Alarm Condition Service Repair Priority Removal Criteria CircuitLeak UserAlarm Controlsettingonthe This message tells yo
259. splay Disconnect the cable Remove the three screws that hold the dovetail extrusion to the upright aw Remove the extrusion to allow cable replacement replacement remove e the rear upper panel Section 9 2 1 e the lower electrical enclosure access panels Section 9 2 2 e the tabletop Section 9 3 and the cable raceway retainer plate Section 9 23 5 under the tabletop cable in the notch shown to hold the cables in place 43cm Tet machine to approximately 43cm mounting screws 9 49 Aespire 7900 9 21 3 Installing 1 Place the folding mount into the extrusion the folding mount 5 g i _ Slide the bracket down until the z els uum me Flush plate is flush with the top of the Hl dovetail P 3 Tighten the mounting screws to secure the display arm 4 Remountthe display 5 Attach the cable to the display 6 Install the connector cover Attach the cable clamp 4 1 Cover 2 Rectangular washer Z L 2 3 Mounting screw i E x 4 Cableclamp m 5 Ensure that the cable is secured so that it does not interfere with the display arm through the entire range of motion 9 50 02 05 1009 0541 000 9 Repair Procedures 9 22 Aespire 7900 Control Display module To remove the control module 1 2 3 Disconnect the cable Remove the screws that attach the control module to
260. ssure switch used with the ventilator N50 balance regulator N50 flow control valve N50 flow tube s Air flow control valve Air flow tube s Supply connection for Venturi suction C Op drive gas d Airdrive gas Vaporizer port valve Vaporizer Low pressure relief valve 38 kPa 5 5 psi Auxiliary flowmeter optional To ABS To ACGO Test port primary regulator Test port secondary balance regulator Approximate values K gt lt Pneumatic Connection Filter Direction of Flow Check Valve ovo 02 05 1009 0541 000 2 Theory of Operation N20 Air 02 02 4 4 4 4 4 e E 18 RRB RRS Mur jaar PU m 25 LR B 5h sd ALJ ALJ ALI ALJ i 28 28 28 28 X 2 2 2 S aB B 4 B 6 6n 6 ot n ey tot aly Jj 7 el E c Eccc L x21b xci onda 7bx Tax IIA 8 14a unn di Bic cre ee E 9 10 055 4 a roho Y Xx 1 TO qa i 29x bog 29 eos ar Link 25 11 eink __ 8 19 Jf 3 i 26 DC UN Vaal P rar Pa 0009109091 GO QO j 7 12 peser es 120 ES D a e L 97 TD 24 J 22 22 d 22 22 i id H iF i p
261. t 5 Test 6 Test 7 Test 8 Test 9 Test 10 Test 11 Test 12 Test 13 Test 14 Test 15 A WARNING A CAUTION The previous flowcharts refer you to the following tests These tests require the use of the Low Pressure Leak Test Device and the Leak Test Tool Kit refer to Section 10 1 Service tools The Leak Test Tool Kit includes e the Machine Test Tool e the Circuit Test Tool and various Test Plugs When performing these tests ensure that the ACGO selector switch is set to the ABS position Verifying the integrity of the test tools cece eee eee eee eee 7 13 Low pressure leak testing the machine cece cece eee e nee ee 7 14 Testing the airway pressure gauge and Port 1 and Port 3 u cup seals 1 15 Testing the bag port cover the APL valve the Bag Vent switch and the negative pressure relief valve iis ce eens ca cheese xy ne x 7 16 Testing the APL diaphram cece eee eee ee ene 7 17 Testing the bellows module and the Bag Vent switch 08 7 18 Testing the bellows the bellows pop off valve the bellows base manifold and the Bag VENt SWITCH uoces eve ae eire cento a aee eon ear n Lao n 7 19 Testing the bellows assembly 000 c cece cece 7 20 Testing the flow sensor module the circuit module and the soda lime canister 7 21 Testing the circuit module and the canister 0 00 c cece eee eee ee 7 22 Testing the circuit Module 6 eee
262. t guard item 10 Flush pressure switch O ring Screws Guard Tubing silicone Tie wrap 10 Illustrated Parts Stock Number 1006 8357 000 1011 3354 000 1006 3186 000 0203 5225 300 1011 3355 000 1006 3178 000 0140 6226 111 9213 0540 003 1009 3411 000 1006 3972 000 1006 3213 000 0144 2124 201 1009 3140 000 1009 3164 000 0203 5915 300 2 3 4 10 29 Aespire 7900 10 18 Breathing system interface 17 16 19 10 30 18 21 22 1 13 11 12 9 11 12 13 11 12 6 7 8 Ec e 3 O onoo FW NY NO NON NYNNYN PRP RP RP RP RP RP RP PB ARWNHROHANAARWNHHRO 26 3 4 Description Assembly main support casting Bolt M6x16 flange Handle grip Screw M6X16 Sems Latch push to close Latch push to close w microswitch Screw SKT HD CAP M3x8 SST Washer lock external M3 Port plug circuit Port fresh gas Seal U Cup 12 7 ID BCG 19 05 OD EPR Ring retaining 15 88 SHAFT DIA TYPE E SST Port sample gas Connector bulkhead O2 Cell with harness Ring retaining 9 53 SHAFT DIA TYPE E SST Switch subminiture w QDISC terminals Screw M2 5 x10 Bracket BTV switch Lever BTV switch Bracket cap BTV Screw SKT HD CAP M3x8 SST Washer lock external M3 Bracket bypass switch Paddle switch actuator Bracket paddle hinge Screw M6x6 set cup Lubricate sparingly with Krytox Stock Number 1407 7010 000 1009 3125 000 1407 3317 000 0
263. t switch assembly g 2 ao 5 h Connect Air and O supplies Connect the power cable to an electrical outlet Set the system switch to On Increase the O and Air flow Make sure that gas flows Make sure that you do not feel or hear any leaks Make sure that the display comes On Setthe system switch to Standby Make sure all gas flow stops and the display tums Off 11 Reinstall the gauge panel and the tabletop 12 Perform the checkout procedure Section 3 1009 0541 000 02 05 9 11 Aespire 7900 9 8 Service the flowmeter module 9 8 1 Remove 1 Bleed all gas pressure from the machine Section 9 1 front flowmeter 5 Ensure that all cylinder and pipeline gauges read zero before proceeding panel shield The flowmeter panel is held in place with two latching tabs at the right side To remove the panel release each latch by pushing it toward the center of the panel with a thin rod 3 mm hex wrench through the access hole in the shroud I 4 Remove the panel 5 Toreinstall the panel engage the retaining tabs on the left side and press the right side againstthe shroud to latch itin place 9 8 2 Remove 1 Remove the front flowmeter panel shield Section 9 8 1 flowtubes for 2 Toremove aflowtube assembly push up on the tube just enough to clearthe bottom cleaning or seal pull out from the bottom until the tube clears the flowtube module then pull replacement down slowly to release it fro
264. t the value on the inspiratory pressure gauge does not exceed 85 cm H20 Some pressure fluctuation is normal Fully open the APL valve to the MIN position Set 0 flow to 3 L min Turn any other gases off Make sure that the value on the inspiratory pressure gauge is less than approximately 5 cm H50 Push the O flush button Make sure that the value on the inspiratory pressure gauge stays less than 10 cm H30 Set the Op flow to minimum and make sure that the value on the inspiratory pressure gauge does not decrease below 0 cm H5O 8 Remove your hand or the test plug from the patient connection 9 Setthe System switch to Standby AN WARNING Make sure that there are no test plugs or other objects caught in the breathing system 1009 0541 000 02 05 3 15 Aespire 7900 3 12 Auxiliary 05 flowmeter tests 1 Open the O cylinder valve or connect an O pipeline 2 Rotate the flow control clockwise decrease to shut off the flow The ball should rest at the bottom of the flow tube and not move 3 Rotate the flow control counterclockwise increase The ball should rise immediately after rotation is begun It should rise smoothly and steadily with continued counterclockwise rotation When a desired flow is set the ball should maintain in a steady position 4 Occlude the auxiliary O5 outlet The ball should rest at the bottom of the flow tube and not move A ball that does not rest at the bottom ofthe flow tub
265. t view references 0 cece eee eee aaee 10 7 10 4 External Components rear view cece eee III 10 8 10 5 Front panel gauges and system switch 0 cece eects 10 9 10 6 Rear panel components ccc cece cece nni ena eu 10 10 10 7 Tabletop components 000 cece cece eee IH 10 11 10 8 Right side Components ssssssssseseeI 10 12 10 9 External components lower assembly esess nn 10 13 10 10 Drawer ia eos tere rem hr ae vie ep EE XE EF DR a ae 10 14 10 L TAG POWeECOTUS uisa en tenter tet UR state na te e XOT OR M ecu E 10 15 10 12 AC Inlet Outlet Components ccc eee eee eee eens 10 16 10 13 Pipeline inlet fittingS iiien nea aen A NO eee ene 10 18 10 14 Cylinder Gas Supplies 00 cece cece eee ene e nen nae 10 19 10 14 1 Cylinder inlet fittings 20 0 ccna 10 20 10 15 Vaporizer manifold 0 cece I 10 21 10 16 Flowmeter components 00 cece cece eee een eee eee enna 10 22 10 16 1 Flowtube paitsio ioaea na ai rE AE EE IRI 10 24 10 16 2 Secondary regulator components sseseseseeeeeeees 10 26 10 17 ABS to machine Interface Components 00 cee cece eee eee eae 10 28 10 17 1 Flush Valve and ACGO Selector Switch 0 cece eee eee eee 10 29 10 18 Breathing system interface cece cee eee eeee 10 30 10 1 Aespire 7900 10 19 Breathing System 4 esc sees eb rr e rh rk e RH n deen eee ee
266. te or replace as appropriate Unable to begin mechanical ABS not fully engaged Remount ABS ventilation No O supply Check 05 supply Defective Bag Vent switch Check Bag Vent switch 1009 0541 000 02 05 7 3 Aespire 7900 7 2 Breathing System Leak Test Guide 7 4 Note A WARNING Always perform the low pressure leak test Section 3 9 on the machine before proceeding with these breathing system leak tests The procedure in Section 7 2 1 helps you isolate the leak to Bag Mode components to Vent Mode components or to components that are common to both modes s If you have a similar leak in both the bag mode and the ventilator mode you must consider the Flow Sensor Module the Circuit Module the Absorber Canister area and the bulkhead components including CGO tubing Carefully inspect the circuit module for damaged seals or misassembly and the seating of the O sensor f you have a larger leak in one area than the other Vent or Bag the leak is most likely NOT inthe Flow Sensor Module the Circuit Module the Absorber Canister area orthe bulkhead ports Follow the troubleshooting flowcharts in Section 7 2 2 to determine the best sequence of tests for locating a breathing system leak The procedures in Section 7 2 3 test specific components of the breathing system for leaks Objects in the breathing system can stop gas flow to the patient This can cause injury or death Donotuse atest plug that i
267. tem asks you to confirm that you want to clear the error log After clearing the error log e the Boot Count Last Cleared number will reset to the Current Boot Count number e the menu will show the message No entries in log 4 7 Aespire 7900 4 3 3 System The System Configuration menu includes settings that are tailored to the Configuration specific machine Drive Gas Oz Heliox Mode Off Ye Alarm Limits Automatic Language English Optimal Screen Contrast 5 Go to Service Modes Menu Figure 4 4 Calibrations System Configuration menu 4 3 3 1 Altitude The accuracy of some of the ventilator measurements is altitude sensitive To ensure the specified accuracy the altitude setting should be setto the specific altitude where each machine is located Altitude settings range from 400 to 3600 meters in increments to 100 meters Drive Gas Heliox Mode We Alarm Limits Language Optimal Screen Contrast Oz Off Automatic English 5 Go to Service Modes Menu Figure 4 5 Altitude menu item 4 8 02 05 1009 0541 000 4 Self Tests and Service Mode 4 3 3 2 Drive Gas Either O or Air can be used as the drive gas for the ventilator s pneumatic engine To compensate volume calculations for the specific density of the drive gas used the drive gas selection on this menu must match the actual drive gas To change the actual drive gas refer to Section 9 5 A CAUTION If you change the drive gas you must a
268. that is located under the Gas Inlet Valve 3 During normal operation the Gas Inlet Valve GIV is open to let supply gas flow The GIV provides a shutoff ofthe supply gas when the ventilator is not in use The GIV also shuts off supply gas to the ventilator under failure conditions detected by the CPU or over pressure switch The output from the GIV stays at the filtered supply gas pressure Figure 2 22 Inlet filter and Gas Inlet Valve GIV 2 39 Aespire 7900 2 7 2 Pressure The pressure regulator 4 is a non relieving pressure regulator that regulates high regulator pressure filtered supply gas down to 172 kPa 25 psi Inspiratory Flow Control Valve L mate 02 ie Valve Figure 2 23 Pressure regulator 2 7 3 Flow control The flow control valve 5 is controlled by the CPU Signals are sent to the flow control valve valve of the necessary flow determined by ventilator settings and sensor signals The flow control valve modulates the incoming 172 kPa 25 psi drive gases to an output from 0 to 120 liters per minute at pressures ranging from O to 100 cm H50 T Vent Engine Free Breathing i Check Valve Mechanical Over Pressure I0 1 e aem E l Drive Gas Check Valve 1 3 5cmH20 bias Inspiratory Fl Figure 2 24 Flow control valve 2 40 02 05 1009 0541 000
269. the bellows f The pressure must not increase to more than 15 cm H30 on the pressure gauge g If the bellows falls more than 100 mL min top of indicator it has a leak 17 5 Enterthe Service Mode Push and hold the adjustment knob on the ventilator s display and set the system switch to On Select and confirm Service Mode Select and confirm Breathing System Leak Test Section 4 3 12 Followthe instructions on the screen The leak rate should be less than 200 mL min For machines with a single tube O flowmeter the pressure reading should reach 30 cm H 0 at minimum flows greater than 200 mL min OO 0o o 9e 7 5 Aespire 7900 Bag Circuit 6 Testthe Bag circuit for leaks Setthe system switch to On Set the Bag Ventilator switch to Bag Plug the Bag port use your hand or the approved test plug Close the APL valve 70 cm H320 Set the O flow to 0 25 L min Close the patient connection using a hand or test plug on the side of the breathing system and pressurize the bag circuit with the O flush button to approximately 30 cm H 0 gt o 00 0 g Release the flush button The pressure must not decrease A pressure decrease large enough to see on the gauge indicates an unacceptable leak APL Valve 1 Testthe APL valve a Fully close the APL valve 70 cm H50 b Setthe total fresh gas flow to approximately 3 L min and make sure that the value on the inspiratory pressure gauge
270. the mounting brackets Remove the control module and place it on a static control workstation 9 22 1 Keyboard and EL display Front housing EL display Keyboard Rotary encoder switch Control knob m RONMHPA A CAUTION 1009 0541 000 02 05 CX N AB 29 072 Use an approved static control workstation and wrist grounding strap To remove the keyboard and EL display 1 2 3 9 Loosen the screws on the rear corners of the control panel assembly Remove the back cover assembly To separate the front and rear assemblies disconnect the 50 pin ribbon cable from connector J2 of the keyboard Remove the 20 pin ribbon cable from its connector on the EL display Remove the four M3 Keps nuts from mounting studs on keyboard and remove the EL display Remove the seven M4 Keps nuts from keyboard studs and remove keyboard from the front housing To replace the encoder switch see Section 9 22 2 When you replace the keyboard remove the protective film from the back of the new keyboard window clean and check for scratches Assemble in reverse order 10 Perform the Checkout Procedure found in Section 3 9 51 Aespire 7900 9 22 2 Encoder switch GRUNNE 9 52 Encoder switch with harness Locking washer Flat washer Mounting nut Control knob AB 29 072 To replace the encoder switch To access the encoder switch follow the disassembly instruction
271. the required flow rate through the drive gas regulator for proper calibration Adjust Drive Gas Regulator Directions for adjust Drive Gas Regulator 1 Attach pressure test device to regulator pressure port 2 Remove the bellows assembly and exhalation valve 3 Select Start Regulator Adjustment 4 Adjust regulator until pressure test device reads 172 kPa 25 psi 5 Select Stop Regulator Adjustment when regulator is adjusted 6 Reassemble exhalation valve and bellows assembly when adjustment complete Start Regulator Adjustment Go to Service Modes Menu Figure 4 28 Adjust Drive Gas Regulator menu Remarks The drive gas regulator should provide a constant gas input pressure of 172 kPa 25 psi You can verify this pressure by attaching a pressure test device to the regulator pressure port Shown below and performing the above procedure If required adjust the regulator to 172 1 72 kPa 25 0 25 psi Regulator pressure port Figure 4 29 Location of the regulator pressure port 4 28 02 05 1009 0541 000 4 3 19 0 Calibrations Figure 4 30 02 Calibrations menu 1009 0541 000 02 05 Remarks 4 Self Tests and Service Mode The O Calibrations take into account the altitude setting Before starting the calibrations ensure that the altitude setting in Calibrations System Configuration is set to the appropriate altitude for the machine location Note a circle module is required for all ca
272. the tube Find the sample return line at the left Separate the scavenging tube Remove the tabletop Section 9 3 Port 4 A of the ABS breathing system is connected to the expiratory circuit downstream of the expiratory check valve As a factory default Port 4 is plumbed with a length of tubing that is plugged B at the far end rear corner of the pan assembly The sample return line includes an inline connector C at the point where the sample line goes down into the vent engine housing removing the inline connector from the portion of the tube that extends into the vent engine housing Plug the open end of the scavenging tube with the plug removed above Insert the inline connector from the sample return port into the open tube to Port 4 Pull on the connector to ensure that it is securely connected Replace the tabletop Perform the checkout procedure Section 3 02 05 1009 0541 000 9 Repair Procedures 9 13 Replace the APL valve 1009 0541 000 02 05 Place the new APL valve into position Place the spring into the retainer While holding the APL valve tight to the Remove the ABS breathing system The APL valve is held in place with a spring and a retainer A that snaps into a recess in the lower body of the APL valve To release the retainer place an appropriately sized straight blade screwdriver into the housing cutout B Twist the screwdriver to rel
273. tion of the valve output The bleed resistor exhausts only clean drive gas and must not be connected to a waste gas scavenging circuit The output is routed away from the electrical components to make sure that systems using oxygen drive gas meet the 10VA limitation requirement for oxygen enrichment Bag Ver L Tao cm i20 Exhalation Valve 2 0 cm H20 bias Gas Check Valve cm H20 bias bsue 1 Valve NE i 0 1 0 10 LPM Patient and Fresh Gas 0 20 LPM Total Typical Flow contro Bleed to Ambient X a 1 0 LPM 0 3 0 cm H20 uous Gate dependen Xen Ventto Ambient Figure 2 29 Reservoir and bleed resistor 2 43 Aespire 7900 2 7 9 Free breathing valve 2 7 10 Breathing circuit flow sensors 2 44 The free breathing valve 17 helps assure the patient can spontaneously breathe The ventilator is programmed to supply a specified number of breaths per minute to the patient If in between one of these programmed cycles the patient needs a breath spontaneous the free breathing valve permits the patient to inhale The free breathing valve is closed on mechanical inspiration Free Breathing Check Valve Mechanical Over Pressure ID 1 j edem c l Drive Gas Check Valve amp l 7a 3 5cm ji Figure 2 30 Free breathing valve Two flow sensors are used to monitor inspiratory and expiratory gas flow The inspiratory fl
274. to 19 mm male M1003947 10 54 Passive AGSS Specific Parts 14 15 16 17 18 Receiver Passive Adjustable Plug Assembly tethered Screw shoulder M3 Connector 30 mm ISO Male Adapter scavenging 30 mm female to 19 mm male Lubricate sparingly with Krytox 1407 3908 000 1407 3909 000 1407 3915 000 1406 3555 000 1500 3376 000 02 05 1009 0541 000 Qty b pack 10 Illustrated Parts 6 5 1009 0541 000 02 05 10 55 Aespire 7900 10 28 2 Adjustable AGSS Items 1 through 12 are included in all AGSS kits Item Description Common Parts Stock Number Qty 1 Seal Receiver Body 1407 3901 000 2 Reservoir 1407 3903 000 3 Seal and scavenging down tube 1407 3904 000 4 Thumbscrew M6x28 5 1406 3305 000 5 O ring 4 42 ID 9 65 OD 1407 3923 000 2 6 Thumbscrew M6x43 1406 3304 000 7 Valve unidirectional negative pressure relief 1406 8219 000 Ta Seat Valve Negative Pressure 1406 3396 000 Tb Retainer disc 1400 3017 000 c O ring 20 35 ID 23 90 OD 1406 3397 000 Td Disc check valve 0210 5297 100 8 O ring 22 ID 30 OD silicone 1407 3104 000 2 9 O ring 21 95 ID 25 51 OD 1406 3558 000 10 Screw M4x8 9211 0640 083 2 11 Cap 3 18 Barb Silicone 1406 3524 000 12 Adapter auxiliary inlet 30 mm male to 30 mm male M1003134 13 Adapter auxiliary inlet 30 mm male to 19 mm male M1003947 Adjustable AGSS Specific Parts 14 Receiver Passive Adjustable 1407 3908 000 15 Plug Assembly teth
275. tput cardiac bypass in progress or ACGO on Volume high In range flow data No measured breaths in Check that mechanical ventilation is on Apnea gt 2 available the last 120 seconds Check the breathing circuit 3 Check ventilator settings and volume output A breath is measured or apnea alarm detection off cardiac bypass in progress or ACGO on 7 40 02 05 1009 0541 000 1 Troubleshooting Message Alarm type Enabling Criteria Alarm Condition Service Repair Priority Removal Criteria Vr Not low In range flow data Vg lt Vz bigger of 0 1 Check ventilator settings is Pii set too low Achieved available Vr or 5 mL for 6 for volume setting mechanical breaths in a Check drive gas iud Check the breathing circuit and flow sensor Alarm condition becomes false i e 1 breath connections exceeding threshold or mechanical ventilation Perform flow sensor calibration transition on to off Replace the flow sensors Check ESIB to CPU cabling Replace the ESIB board Replace the CPU board VTE gt Insp Vr low In range flow data Vc gt larger of V7 Check flow sensor connections 2 available 0 3 V or Vy 100 for 6 Check ventilator settings consecutive mechanical Check the breathing circuit and flow sensor breaths in circle system connections Four consecutive breaths measured with correct Perform flow sensor calibration volume seen by flow sensors Replace the flow sensors
276. ts 3 9 3 9 2 ISO or BSI standard low pressure leak test 0 cece eee eee eee 3 10 9 LOAA Lests c ects ether eh seth pr e t e receta lat FUR el DE RR ao En 3 12 3 11 Breathing system tests irasai a a a Ie 3 14 3 12 Auxiliary O2 flowmeter tests 0 0 c cece eee III 3 16 3 13 Integrated Suction Regulator tests cece eee eee eens 3 16 S T4 Powerftallure teSU s s xac Stern RR OE UR RE RN Re sacl mines AR DDR dra 3 17 3 15 Electrical safety tests 1 1255 oc D a aoa DERE TUR E 3 17 After any repair or service ofthe Aespire system complete all tests in this section Before you do the tests in this section Complete all necessary calibrations and subassembly tests Refer to the individual procedures for a list of necessary calibrations e Completely reassemble the system If a test failure occurs make appropriate repairs and test for correct operation 3 1 Aespire 7900 3 1 Ventilator post service checkout After servicing the Aestiva 7900 Ventilator run the service menu tests that are pertinent to the components replaced Perform calibration on flow sensors pressure sensitivity flow valve and bleed resistor Then complete the checkout procedure for the entire machine in the following sections 3 2 Inspect the system A CAUTION The upper shelf weight limit is 34 kg 75 Ib A WARNING Donotleave gas cylinder valves open if the pipeline supply is in use Cylinder supplies could be depleted leavin
277. u Audio Off Alarm limit menu that the audio alarm for circuit leaks was turned off ConnectO2 low Digital 1 0 signal Is O sensor connected If it is replace the 0 Sensor indicates a disconnect cable Alarm condition becomes false If problem persists check or replace the ESIB to CPU cable If problem persists replace the ESIB board If problem persists replace the CPU board CPU Failure Minimum Ventilator malfunction Ventilate manually Replace the CPU board Shutdown Monitoring is not 5 reliable CPU Internal Minimum Ventilator malfunction Ventilate manually Replace the CPU board Error Shutdown Monitoring is not 6 5 reliable Display Minimum Display voltage out of Check the VEL supply from service mode Voltage Out Shutdown range under Display A D channels Verify that the of Range 5 Counts value is between 1645 and 2675 If not in range Refer to section 5 6 3 measure the VEL supply on CPU board at TP213 referenced to ground at TP12 10 to 15 23 volts If this voltage is in range replace the CPU board because the problem is in the A D channel If the VEL supply is not in range remove Display to CPU cable and re test If in range replace the display If still not in range replace the CPU Exp Flow User Alarm The system cannotread Operation continues Replace the flow sensor Sensor Fail the calibration data with default values stored in the sensor Exp Reverse medium In range flow data Negative flow
278. ue Line Filter i n eee 15V 100mA max ow Valve Control and Drive Canister 10 VA limited Nuus Switch A D Converter A max 1 15 VDC Supply 10VA limited ESIB DC Supply Monitoring i Integrated CPU I VCHGR 16 0 V Typical VMAIN 12 5 V Typical 12V Battery Breathing System Figure 11 3 Electrical cabling block diagram 11 4 AB 74 071 02 05 1009 0541 000 Key to Numbered Components Key to Symbols Figure 11 4 Pneumatic circuit diagram 1009 0541 000 02 05 Pipeline pressure gauge Pipeline inlet Oylinder pressure gauge Cylinder inlet Primary regulator cylinder pressure High pressure relief valve 758 kPa 110 psi Supply connections for the ventilator a Op drive gas b Air drive gas 8 System switch 9 Switch for low O supply pressure alarm used with the ventilator 10 O secondary regulator 207 kPa 30 psi 11 O flow control valve 12 05 flow tube s 14 O Flush a Flush valve b Pressure switch used with the ventilator 15 N50 balance regulator 16 N50 flow control valve 17 N50 flow tube s 19 Air flow control valve 20 Air flow tube s 21 Supply connection for Venturi suction a Op drive gas b Air drive gas 22 Vaporizer port valve 23 Vaporizer 24 Low pressure relief valve 38 kPa 5 5 psi 25 Auxiliary flowmeter optional 26 To ABS 27 To ACGO 28 Test port primary regulator 29 Test port secondary balance regulator Approximate valu
279. ure The Breathing System Leak Test allows you to more precisely test the ventilator portion of the breathing circuit for leaks For the breathing sysem leak test to function correctly the flow valve must be calibrated see section 4 3 22 By using the patient circuit to establish a closed loop you can measure the leak rate e The leak rate is the fresh gas flow needed to maintain 30 cmH20 The system should have a leak rate lt 200 mL min Directions for Breathing System Leak Test 1 Set Bag Vent switch to Vent position 2 Set fresh gas flow to minimum 3 Open patient Y connection to atmosphere 4 Select Start Leak Test to start the test 5 Verify that the Bellows is completely collapsed 6 Occlude the patient circuit at the Y connector 7 Slowly increase fresh gas flow until Pressure Gauge reads 30 cm H20 8 Leak rate is the fresh gas flow needed to maintain 30 cm H20 9 Press knob to end test Start Leak Test Go to Service Modes Menu Figure 4 21 Breathing System Leak Test menu 1009 0541 000 02 05 4 21 Aespire 7900 4 3 13 Display A D Channels The software displays the A D values for each of the A D channels A D Channel Inspiratory Flow Expiratory Flow Ainway Pressure Manifold Pressure Oz Flow Current Sense Flow DAC Feedback Battery Voltage Battery Current Figure 4 22 Page 1 of Display A D Channels menu A D Channel 1 225 Volt Fief 5 8 Voltage Test 15 Analog Supply
280. ure 0 00 cm H20 Start Pressure Sensitivity Cal Go to Service Modes Menu Flow Sensor Leak Test 1 Select Display A D Channels from the Diagnostic Tests Tools menu Set Fresh gas flow to 2 LPM Open the APL valve 0 cm H320 Place Bag to Vent switch in the Bag APL position Connect a short tube between the inspiratory and expiratory flow sensors The airway pressure inspiratory flow and expiratory flow on the ventilator display should read near zero between 0 5 and 0 5 LPM flows 2 Occlude the bag port Adjust the APL to read 10 cm H20 on the gauge The flow may jump briefly but should stabilize to read between 0 5 and 0 5 LPM Very gently push the tubes coming from the flow sensors slightly in all directions Observe to see if the flow measurements jump If either sensor reads more than 2 LPM STOP This indicates a possible leak in the flow sensor pneumatic circuit Skip steps 3 and 4 go directly to step 5 If the pressure is increased further the ESIB may be damaged 4 31 Aespire 7900 4 3 22 Calibrate Flow Valve Figure 4 33 Calibrate Flow Valve menu Remarks 4 32 3 Adjustthe APLto read 20 cm H20 on the gauge The flows may jump briefly but should stabilize to read between 0 5 and 0 5 LPM 4 Adjustthe APLto read 40 cm H20 on the gauge The flows may jump briefly but should stabilize to read between 0 5 and 0 5 LPM 5 Ifthe flow measurements on the ADC page stay near zero the flow senso
281. ustralia Pipeline inlet Air fitting Body Air DISS Body Air NIST Body Air DIN Body Air G 3 8 BSPP Pipeline inlet assembly Air France service kit Pipeline inlet assembly Air Canada service kit Pipeline inlet assembly Air Australia service kit O ring bore seal 05 and N50 Air Sintered metal filter with o ring Pipeline checkvalve with o ring Gas Inlet Manifold replacement Relief valve 758 kPa 110 psi Screw M4x20 Lockwasher M4 external Label pipeline inlet blank 3 4 Stock Number 1006 5149 000 1006 5158 000 1006 5161 000 1006 5170 000 1006 8363 000 1006 8360 000 1006 8396 000 1006 5150 000 1006 5159 000 1006 5162 000 1006 5171 000 1006 8362 000 1006 8359 000 1006 8397 000 1006 5151 000 1006 5160 000 1006 5163 000 1006 5172 000 1006 8361 000 1006 8358 000 1006 8398 000 0210 0479 300 0210 0539 300 1006 8351 000 1006 3160 000 1009 8066 000 1009 8067 000 1009 8068 000 1011 3049 000 0144 2124 218 9213 0540 003 1009 3197 000 02 05 1009 0541 000 10 14 Cylinder Gas Supplies pee Item Item ao oa A C n Label Sat Cylinder Supply De Description Pin Index Inboard Gas supply 05 1006 3201 000 Gas supply N50 1006 3202 000 Gas supply Air 1006 3203 000 Description Standoff 3 per supply Screw M6x80 socket head cap 3 per supply Lockwasher M6 external for above screw Cylinder inlets Pin Index or DIN for external cylinder Tee handle be
282. ve electrical feedback e Supply voltage checks Battery voltage checks The flow valve feedback signal is tested in non mechanical and mechanical ventilation states The flow valve is closed in non mechanical ventilation These tests are run every 30 seconds during normal operation Alarms are associated with each test A failure causes an alarm to display on the screen in the alarm display area s CPU Test Display RAM walking pattern test s Data RAM walking pattern test e FLASH ROM CRC verification 4 3 Aespire 7900 4 2 Service Mode Confirmation menu The service calibration mode tests and or calibrates hardware necessary to prepare a ventilator manufactured for shipment and to service a ventilator in the field There are two ways to enter the service mode s If the machine is turned off push and hold in the adjustment knob while setting the system switch to On Hold the adjustment knob pushed in until the Service Confirmation menu appears Use the adjustment knob to highlight Service Mode then push the adjustment knob to confirm the selection Service Confirmation Service Mode Normal Operation s Ifthe machine is already in normal operation set the Bag Vent switch to Bag and press the End Case key push the adjustment knob to confirm Then press the V Pinsp the PEEP and the Menu switches at the same time to reset the software powerup As the system restarts push and hold the ad
283. ve gas filter and Gas Inlet Valve uuuunue eee 2 39 2 1 2 Pressureregulator crean rana ava t Reste Rieti eta Sox Rare aca cx 2 40 24 3 Flowcontrol valve ove PERCY RA RR EORR ORE ENA 2 40 2 7 4 Drive Gas Check Valve DGCV 0 cece cece eee II 2 41 2 7 5 Bellows Pressure Relief Valve cece cece eee nee eens 2 41 2 7 6 Exhalation Valve sner cece cette Ie 2 42 2 7 7 Mechanical Overpressure Valve cece eect ene eee eens 2 43 2 7 8 Reservoir and bleed resistor 2 43 2 1 9 Free breathing valve eere eec ra net e e Ec eren oa n 2 44 2 7 10 Breathing circuit flow sensors 00 cece 2 44 2 1 Aespire 7900 2 1 Theory overview This section describes e The flow of gas through the anesthesia machine The flow of gas through the breathing system e Electrical signals between the anesthesia machine including the breathing system and the ventilator 2 2 Gas flow through the anesthesia machine 2 2 1 Overview Gas supplies 0 flow 2 2 Refer to Figure 2 1 Gas comes into the system through a pipeline 2 or cylinder 4 connection All connections have indexed fittings filters and check valves one way valves Gauges show the pipeline 1 and cylinder 3 pressures A primary regulator 5 decreases the cylinder pressures to approximately pipeline levels A pressure relief valve 6 helps protect the system from high pressures To help prevent problems with the gas supplies e Install
284. ver rear upper Cap hose reel Screw M5 5x20 Strap hook loop Screw M6x1 0 captive Door access not functional for Aespire Screw M4x12 Spring cantilever Screw M3x8 Cover trap bottle if no internal suction Cover regulator yoke if no regulator Plate clip cover Wrench DIN cylinder without cable Wrench pin index cylinder with cable Cable Ferrule cylinder wrench cable retainer Handle P grip Clean mounting surface with isopropyl alcohol 2 3 Stock Number 1009 3073 000 1009 3075 000 1009 3384 000 1009 3233 000 1009 3114 000 1009 3074 000 1009 3109 000 1009 3124 000 0142 4254 106 1009 3173 000 1009 3121 000 1009 3185 000 1202 3651 000 0219 3415 800 1010 3049 000 1001 3708 000 1009 3343 000 6 7 02 05 1009 0541 000 10 Illustrated Parts 10 7 Tabletop components 9 10 11 12 1 4 3 2 3 Item Description Stock Number 1 Tabletop work surface 1009 3029 000 2 Screw relieved M4x12 1504 3001 000 3 Washer retainer 1009 3178 000 4 Screw relieved M4x16 1011 3980 000 5 Clip used with bag arm 1009 3142 000 6 Clip used with bag on hose 1009 3139 000 7 Window check valve 1009 3088 000 8 Palnut 1009 3090 000 9 Hook breathing circuit 1009 3086 000 10 Bolt shoulder 1009 3172 000 11 Washer wave 1009 3035 000 12 Washer Nylon 1009 3150 000 1009 0541 000 02 05 10 11 Aespire 7900 10 8 Right side Components Item Description 1 Extrusion cover 2 Screw M6x20
285. vice Modes Menu Figure 4 15 Test EEPROM menu 1009 0541 000 02 05 4 15 Aespire 7900 4 3 7 Test GIV Figure 4 16 Test GIV menu GIV Test FAIL instructions 4 16 To test the GIV gas inlet valve the software first closes the GIV It reads the A D channel forthe GIV If the A D channel forthe GIV does not read closed the test fails otherwise the test continues The software then opens the flow valve to the calibrated flow of the bleed resistor and waits for the flow to stabilize about 2 seconds Once the flow is stabilized the software checks to see if manifold pressure has dropped to less than 0 5 cm H50 If manifold pressure does not drop below 0 5 cm H50 the test fails otherwise the test continues The software then closes the flow valve and opens the GIV It reads the A D channel for the GIV Ifthe A D channel for the GIV does not read open the test fails Test GIV Directions for testing GIV 1 Select Start Test to perform GIV test Go to Service Modes Menu Failure can be caused by the valve orthe CPU board malfunctioning Use a multimeter to measure the resistance of the GIV solenoid It should be approximately 25 ohms If necessary replace the GIV solenoid Section 9 24 2 Use a multimeter to measure the voltage at the inlet valve connector on the pneumatic connection board The voltage should be 4 5 volts when the GIV is open f the voltage is 4 5 volts or greater service the GIV Secti
286. w Om pus O2 P LINE K O2 Cyl opt K gt Venturi 54 4 Atmosphere Free Breathing Aespire 7900 Check Valve L h Mechanical Over a Pressure Valve oo Popoff Valve 0 70 cm H2O CO2 Bypass and Condenser Option APL valve NO Ae G la Exhalation Valve 2 0 cm H20 bias Bag Vent 110 cm H20 Drive Gas m B Valve 3 5 cm H20 bias Inspiratory Flow Control Valve p 10 cm H20 f l 0 10 LPM Drive Gas 0 0 20 LPM Total Typical Flow 10 LPM Patient and Fresh Gas ian Bag ie mL Reservoir 1 relief va Negative Pressure ve Expiratory Flow Sensor 02 Cyl opt KK ho AIR P LINE opt K B Gauge de t O Air Cyl opt N20 P LINE opt Std US K auge G 2s 0 N20 Cyl opt ide va Gas Inlet Control Bleed to Ambient ONSA Valve 1 0
287. witch has two positions On and Standby In the Standby position The switch e Turns off the ventilator electrical e Stops O and Air to the flowhead pneumatic Without O pressure the N20 balance regulator stops N50 In the On position The switch e Turns on the ventilator electrical e Supplies O and Air to the flowhead With adequate O pressure the N20 balance regulator supplies N0 System Switch electrical System Switch pneumatic 0 Out Port 4 l Air Out Port 4 O O Wiring Harness Airin Pot 3 O O l 0 In Port 3 Rear View 2 8 02 05 1009 0541 000 2 2 5 Flow control 1009 0541 000 02 05 A WARNING Minimum flows Link system 2 Theory of Operation Needle valves one for each gas adjust gas flows Clockwise rotation decreases flow Counterclockwise increases flow Mechanical stops set minimum flows for all gases The link system sets the maximum ratio of N50 to 05 The Link 25 Proportioning System sets a minimum O concentration in the fresh gas stream when only O and N30 are used Use of an absorber or another gas can still cause a hypoxic mixture to be delivered to the patient especially at low O flow rates At minimum flow two tabs prevent clockwise rotation of the valve stem One tab is on the stop collar the other is on the valve body Stop Tabs m An Valve Body Valve Stem Stop Collar The chain link system helps assure an approx
288. wn the air supply Air can inflate the bubble next step if it is not shut off 13 Apply a small amount of leak detection fluid Snoop to the end of the tube to form a bubble 14 Turn the valve stem clockwise until the bubble no longer inflates Do not turn more than 10 degrees clockwise past this point 10 degrees lt P 1009 0541 000 02 05 5 11 Aespire 7900 15 Push the stop collar against the valve body 16 Turn the collar clockwise until the collar stop tab contacts the minimum stop tab on the valve body Do not turn the valve stem Collar Stop Valve Stop Collar stop must be on Collar CCW side of valve stop RY 17 Carefully pull the collar back so there is a slight gap between collar and the valve body but still engages the valve stop Collar Setscrew Gap example 18 Tighten the collar setscrews Start with the one opposite the tab if possible 19 Turn the valve stem counterclockwise at least one revolution to make sure the collar tab clears the valve stop RENE Stops must clear If the stops do not clear a Turn the valve stem back to minimum position b Loosen the collar setscrews c Repeat steps 14 through17 5 12 02 05 1009 0541 000 5 Calibration 20 Turn the valve clockwise to the minimum stop 21 Verify there is no flow at the end of the tube 22 Thoroughly clean the end of the nylon tube and reconnect it to the vaporizer manifold inlet 23 After calibr
289. y cen re eee per ka Pepe RR EYE R DE ed eee 7 29 7 6 Mechanical electrical troubleshooting guide 00 c cece eee eee eee eee 7 42 7 7 Troubleshooting Flowcharts 0 cece eee 7 44 7 7 1 Ventilator assessment process 6 eee eee eee eens 7 44 7 7 2 No display troubleshooting 7 45 7 7 3 Inaccurate volume ventilation troubleshooting ee ee eee ee 7 46 7 7 4 No ventilation troubleshooting 7 47 7 7 5 High intrinsic PEEP troubleshooting 1 48 4 8 Powersupply test points nun wea cert exerce meme y een ee n ee ea 7 49 1009 0541 000 02 05 7 1 Aespire 7900 7 1 General Troubleshooting Z WARNING Objects in the breathing system can stop gas flow to the patient This can cause injury or death e Donotuse a test plug that is small enough to fall into the breathing system e Make sure that there are no test plugs or other objects caught in the breathing system Problem Possible Cause Action High Pressure Leak Pipeline leak Use a leak detector or Snoop to check for source of leak Repair or replace defective parts O flush valve Use a leak detector or Snoop to check for source of leak Make sure tubing connections are tight Replace valve if defective System switch Use a leak detector or Snoop to check for source of leak Make sure tubing connections are tight Replace switch if defective Cylinder not installed properly Cylinder gauges Make sure cylinder is correctly aligned
290. y encoder are used to control the operations of the ventilator The front panel uses a three step selection change and approve setting scheme to prevent unwanted selections The speaker supplies audio input to the operator Logical layout of primary controls is leftto right in the sequence tidal volume or inspiratory pressure level respiratory frequency I E ratio maximum inspiratory pressure and PEEP positive end expiratory pressure Primary Ventilator interfaces include Display e Soft keys e Rotary encoder control wheel e Knob button control wheel e LED Audio 1009 0541 000 02 05 2 23 Aespire 7900 2 5 3 Enhanced Sensor Interface Board ESIB The Enhanced Sensor Interface Board ESIB for the Aespire 7900 Ventilator is located under the tabletop The ESIB serves as the interface between the ventilator CPU board and the breathing circuit sensors and several machine switches The ESIB processes signals from the s Inspiratory and expiratory flow sensors O sensor Auxiliary Common Gas Outlet ACGO switch Bag Vent switch ABS On switch Drive Pressure Limit DPL switch plumbed to manifold pressure e Manifold pressure transducer Patient airway pressure transducer Note The ESIB includes additional functions that are not used in the Aespire 7900 machine s Module ID hard wire for circle circuit e Canister release switch closed by default Absorber CO Bypass switch off
291. yoke plugs on all empty cylinder connections When a pipeline supply is adequate keep the cylinder valve closed Pipeline or regulated cylinder pressure supplies O directly to the ventilator 7a for O drive gas the venturi suction 21a for O drive gas supply connection the flush valve 14a and the auxiliary flowmeter 25 The flush valve supplies high flows of O to the fresh gas outlet 26 or 27 when you push the flush button The flush pressure switch 14b monitors activation of the flush valve When the system switch 8 is On O flows to the rest of the system A secondary regulator 10 supplies a constant O pressure to the O flow control valve 11 There is a minimum flow of 25 to 75 mL min for dual tube flowmeters or 175 to 225 mL min for single tube flowmeters through the O flowmeter 12 The O pressure switch 9 monitors the O supply pressure If the pressure is too low an alarm appears on the ventilator display 02 05 1009 0541 000 Air and N50 flow 1009 0541 000 02 05 Mixed gas 2 Theory of Operation Pipeline or regulated cylinder pressure supplies Air directly to the ventilator 7b for Air drive gas and the venturi suction 21b for Air drive gas supply connection When the system switch 8 is On air flows to the Air flow control valve 19 Because there is no balance regulator air flow continues at the set rate during an Op supply failure A balance regulator 15 controls t

Aespire 7900 Anesthesia Machine Technical Reference Manual

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