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MAQUET Servo S Ventilator Service Manual

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1. 3 3 Touch screen including frame 3 3 TFT Display with Backlight 3 3 Patient unit 3 3 Inspiratory section 3 3 Expiratory section 3 6 PC 1860 Main back plane 3 8 Pressure transducers 3 8 PC 1771 Control 3 8 PC 1772 Monitoring 3 9 PC 1784 Expiratory Channel 3 9 Power supply 3 9 Control cable 3 11 Optional equipment 3 12 Alarm output connector 3 12 Loudspeaker booster kit 3 12 Isolation shield with drip guard 3 12 Only personnel trained and authorized by MAQUET shall be permitted to perform installation service or maintenance of the SERVO s Make sure to prepare the SERVO s properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted in a log book After any installatio
2. Release both locking devices at the PC board guides for the concerned PC board Carefully pull out and lift off the concerned PC board PC 1771 Control 1 PC 1772 Monitoring 2 Note When replacing PC 1771 Control or PC 1772 Monitoring it can be necessary to re install the System SW For further information refer to section Replacing PC boards in this chapter AC DC Converter To remove the AC DC Converter Remove the main cover Remove the screws holding the AC DC Converter Screws 1 at the mains inlet Screws 2 inside the inspiratory section Pull out the O2 gas module to access the screws Screws 3 at the main cover rail Carefully pull out the AC DC Converter to make the cable connectors accessible Disconnect the mains power cable 4 and the converter cable 5 Lift off the AC DC Converter ServoS 9048 ServoS 9050 ServoS 9057 ServoS 9059 ServoS 9058 ServoS 9060 4 Revision 02 Service Manual 4 17 SERVO s Ventilator System Disassembling and assembling PC 1863 Power control To remove PC 1863 Remove the main cover Remove the battery modules Remove the screws 1 at the underside of the Patient Unit These screws are accessible also with the SERVO s mounted on a Mobile cart Carefully pull out and lift off PC 1863 2 PC 1862 DC DC amp Standard connectors To remove PC 1862
3. 11 SAFETY_VALVE_OPEN 1 Check inspiratory channel 2 Replace safety valve pull magnet 3 Replace PC 1784 Expiratory channel 12 BRE_NODE_DISCON 1 Replace PC 1771 Control 2 Replace PC 1862 DC DC amp Standard Connectors 13 BRE_NODEID_CONFLICT N A 14 PANEL_NODE_DISCON 1 Check the control cable 2 Replace PC 1777 Panel 3 Replace PC 1862 DC DC amp Standard Connectors Note This error indicates communication failure between PC 1777 and PC 1772 and the error code will thus not be shown on the display but will be logged 15 PANEL_NODEID_CONFLICT N A 16 EXP_FLOW_MTR_NODE_DISCON 1 Replace PC 1784 Expiratory channel 17 EXP_FLOW_MTR_NODEID_CONFLICT N A 18 N A N A 19 N A N A 20 N A N A 21 N A N A 22 BUZZER_SILENCER 1 Replace PC 1772 Monitoring 23 N A N A 24 BACKUP_CAP_ERR_MON 1 Replace PC 1772 Monitoring SERVO s Ventilator System Troubleshooting Revision 02 Service Manual 6 13 6 Error code Error message Possible cause Recommended action 25 TECH_MON_DEVICE_COMM_ERR Depending on ID If repeated replace parts as follows 0 Report to MCC HSC for further information 1 PC 1772 Monitoring 2 PC 1863 Power control 3 PC 1862 DC DC amp Standard Connectors 4 PC 1781 Inspiratory pressure transducer 5 PC 1781 Expiratory pressure transducer 6 O2 Sensor cell or O2 cell Sensor cable or PC 1772 Monitoring 32 PC
4. Field Service System General The Field Service System FSS is a software provided to facilitate troubleshooting service and maintenance of the SERVO Ventilator System To access the Field Service System a Service card PC Card and an access code must be used The access code is unique for each Service card The Service card is personal and must not be handed over to anyone else It is only possible to access the Field Service System with the ventilator in Standby mode The Field Service System must not be activated with a patient connected the ventilator Field Service System functions In the Field Service System it is possible to Display information regarding the ventilator including options and parts installed Calibrate the internal barometer Display service and event logs Run complete or selected test sequences Create and save service reports Export selected logs to a PC Card Create user default configurations Software delivery SW Updates and SW Upgrades can be downloaded from the MCC SW Download website or delivered via freight on a PC Card SW Updates are not dependent on the S N of the ventilator and can thus be installed on any unit SW Upgrades are specific for each ventilator and can only be installed on this unit SW Upgrades must thus be ordered and created in factory before they can be available on the website or delive
5. 2 Replace the loudspeaker 3 Replace PC 1777 Panel 20005 PANEL_PERSISTENT_CHECKSUM_ERR 1 Replace PC 1772 Monitoring Troubleshooting SERVO s Ventilator System 6 16 Service Manual Revision 02 6 Error code Error message Possible cause Recommended action Restart ventilator Communication error between PC 1777 Panel and PC 1772 Monitoring 1 Restart the ventilator and perform a Pre use check 2 Check the Control cable that connects the Patient Unit with the User Interface 3 Replace PC 1862 DC DC amp Standard connectors 4 Replace PC 1772 Monitoring Expiratory Flow Meter 40001 Technical error in Exp flow meter If the technical alarm Expiration flow meter PC 1784 60 V underrange is logged together with error code 40001 see recommended action for this specific fault 1 Replace the expiratory cassette 2 Replace PC 1784 Expiratory channel 3 Replace PC 1785 Expiratory channel connector If technical alarm Expiration flow meter PC 1784 60 V underrange is present 1 Replace PC 1862 DC DC amp Standard Connectors Expiratory cassette Technical error in Expiratory cassette Technical error in Expiratory cassette or in the communication with the cassette If the technical alarm Expiration flow meter Exp cassette power failure is logged together with error code Technical error in Expiratory cassette see recommended action for this specific
6. 6 6 Service Manual Revision 02 6 Test Test description Recommended action if the test fails Internal leakage test continued If message Pressure Transducer difference gt 5 cm H2O appears 1 Check that the pressure transducer tubes and the inspiratory filter are correctly mounted 2 Check that both PC 1781 Pressure transducer Insp and Exp are correctly mounted 3 If the Pressure transducer test also fails see below refer to the recommended actions if Pressure transducer test failed If message System volume too small appears 1 Replace the gas modules Replace one gas module at a time If message System volume too large appears 1 Check that the correct test tube is used during the Pre use check 2 If the Flow transducer test also fails see below replace the gas modules Replace one gas module at a time 3 Refer to troubleshooting as described for Leakage or Excessive leakage above SERVO s Ventilator System Troubleshooting Revision 02 Service Manual 6 7 6 Test Test description Recommended action if the test fails Pressure transducer test Calibrates and checks the inspiratory and expiratory pressure transducers The new zero value for the pressure transducers may not differ more than 6 cm H2O from factory calibration With the inspiratory pressure transducers used as a reference a new gain factor is set
7. Manufacturing Date Hardware Revision Batch No 0420 xxxxx xxxxx Man Date 0520 S N xxxxx Batteri Module Part No 64 87 180 E407E Manufacturing Date 0245 Hardware Version xxxxx Version 1 Version 2 Version 3 Manufacturing date YYWW YearWeek ServoS 9099 ServoS 9100 SERVO s Ventilator System Service procedures Revision 02 Service Manual 5 3 5 ServoS 9078 Replacing the lithium batteries on PC 1771 and PC 1772 The lithium batteries must be replaced after 5 years A Technical error message will appear on the screen if the battery voltage level is too low Always replace both batteries at the same time to keep the same replacement date for both batteries Preparations Set the On Off switch on the control unit to Off Disconnect the mains power cable Disconnect the gas supplies wall and or cylinder Remove patient tubing Replacing the lithium battery The lithium batteries are mounted on ESD sensitive PC boards Refer to chapter Disassembling and assembling section Handling PC boards for further information regarding ESD sensitive components Remove the Patient Unit main cover Refer to chapter Disassembling and assembling Carefully pull out PC 1771 and PC 1772 Note Do not remove the cable connector 1 Information stored in the PC board memory will be erased if the connector is removed If the battery on PC
8. SERVO s Ventilator System Diagrams 10 Diagrams Standard connectors 10 2 Functional Main Blocks diagram 10 3 Only personnel trained and authorized by MAQUET shall be permitted to perform installation service or maintenance of the SERVO s Make sure to prepare the SERVO s properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted in a log book After any installation maintenance or service intervention in the SERVO s perform a Pre use check Refer to the SERVO s Ventilator System User s Manual for details This product contains electronic and electrical components Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards 10 10 2 Service Manual Revision 02 Diagrams SERVO s Ventilator System N26 External 12 V DC supply input 1 12V_UNREG_EXT_DC 2 12V_UNREG_EXT_DC 3 4 GND 5 GND Standard connectors N28 N70 Control cable 1 12V_UNREG_PANEL 2 GND 3 LED_CONTROL 4 ON_OFF_CONTROL 5 CAN_PANEL H 6 CAN_PANEL L N29 RS232 1 2 CI_RDX_ISO 3 CI_TDX_ISO 4 CI_DTR_ISO 5 GND_ISO 6 7 8 9 P63 Alarm output connector 1 NO Normally Open 2 NC Normally
9. Disassembling and assembling The operating capacity meter must be reset after replacement of the membrane To access the reset button select Menu Biomed Service ServoS 9084 ServoS 9013 7 7 6 Service Manual Revision 02 Preventive maintenance SERVO s Ventilator System User Interface Check the touch screen readability Transparency Surface Brightness backlight Estimated lifetime with acceptable brightness level for the lamps is 30 000 hours Using the Field Service System FSS a time meter for the lamps can be shown The time meter must be reset after replacement of the lamps Check if pixels on the touch screen are defective Open the Status window A few defective pixels can be accepted Check that defective pixels are not concentrated to a small area thus reducing the readability in this area FSS is recommended but not required Perform the checks listed below and make sure that the software responds to these actions FSS is recommended but not required Check the touch screen functions Press buttons on different parts of the touch screen Check the Main Rotary Dial Turn and press the Main Rotary Dial Check the Direct Access Knobs Turn all Direct Access Knobs Check the membrane buttons Press all membrane buttons Barometric pressure Select Status General on the User Interface Check that the Barometric pressure value sho
10. 2 POWER_FAILURE_MINUS_12_VOLTS_ TOO_HIGH i e gt 10 8 V 1 Check status of external battery if connected 2 Replace PC 1862 DC DC amp Standard Connectors 3 Replace PC 1863 Power control 3 POWER_FAILURE_12_VOLTS_TOO_LOW 1 Check status of external battery if connected 2 Replace PC 1862 DC DC amp Standard Connectors 3 Replace PC 1863 Power control 4 POWER_FAILURE_12_VOLTS_TOO_HIGH 1 Replace PC 1862 DC DC amp Standard Connectors 5 POWER_FAILURE_24_VOLTS_TOO_LOW 1 Replace PC 1862 DC DC amp Standard Connectors 2 Replace the gas modules Replace one gas module at a time and check that this technical error code will not appear 6 POWER_FAILURE_24_VOLTS_TOO_HIGH 1 Replace PC 1862 DC DC amp Standard Connectors 7 INSP_VALVE_RANGE_ERR 1 Replace PC 1771 Control 2 Replace PC 1772 Monitoring 3 Replace the gas modules Replace one gas module at a time and check that this technical error code will not appear 8 TECH_ERR_INSP_PAUSE_HOLD_TIME_ EXCEEDED 1 Replace PC 1771 Control 9 TECH_ERR_EXP_PAUSE_HOLD_TIME_ EXCEEDED 1 Replace PC 1771 Control Troubleshooting SERVO s Ventilator System 6 12 Service Manual Revision 02 6 Error code Error message Possible cause Recommended action 10 VALVES_DISABLED 1 Replace PC 1784 Expiratory channel 2 Replace PC 1771 Control 3 Replace PC 1862 DC DC amp Standard Connectors 4 Replace PC 1772 Monitoring
11. 4 2 Expiratory cassette 2 8 3 6 6 16 7 5 Expiratory cassette membrane 4 21 Expiratory inlet 2 6 2 8 Expiratory one way valve 2 8 Expiratory outlet 2 6 Expiratory section 3 6 Expiratory valve coil 2 8 4 20 External 12 V DC supply 2 6 10 2 F Field service system FSS 5 6 Fixed keys 2 4 Fixed keys label 4 10 Flash memory 3 2 Functional check 1 5 Functional main blocks diagram 10 3 Fuse F1 2 6 3 10 Fuse F11 2 6 3 10 Fuse F12 2 6 3 10 G Gas cylinder restrainer 2 3 Gas inlet 2 6 3 4 Gas modules 2 6 3 3 4 15 7 3 Gas supply pressure transducers 7 6 H Handling PC boards 4 2 Hazard notices 1 4 Heating foil 2 8 3 7 Humidifier holder 2 3 I Inspiratory channel 4 18 Inspiratory outlet 2 6 3 5 Inspiratory pipe 2 7 3 4 4 15 Inspiratory pressure transducer filter 7 4 Inspiratory pressure transducer tube 2 7 3 5 Inspiratory section 3 3 Installation 1 5 Installation Instructions 1 4 Internal fan 2 6 2 7 3 11 4 18 7 5 Internal fan filter 7 5 L Label strips 4 10 Lithium batteries 1 5 5 3 7 2 7 6 Locking arm 2 4 Loudspeaker 2 5 3 2 Loudspeaker booster kit 2 3 3 12 Loudspeaker grid 2 4 Luminescence detector 2 4 M Main blocks diagram 10 3 Main cover 4 14 Main rotary dial 2 4 2 5 Main units 2 2 Mains indicator 2 4 Mains inlet 3 9 Mains supply connector 2 6 Maintenance kit 5 000 hours 7 3 Memory types 3 2 Menu key 5 4 Mobile cart 2 3 Monitoring SW 2 9 8 Revision 02 Service Manua
12. For further information refer to the User s Manual Note Pre use check is recommended to use in order to calibrate the O2 cell An ID PROM is integrated into each O2 cell Its ID information and remaining lifetime can be read by the SERVO s O2 Sensor The O2 Sensor is mounted in a housing on the Inspiratory pipe as an alternative to the O2 cell SVX9110 The O2 Sensor is a measuring device for the inspired oxygen concentration using ultrasound technique with two ultrasonic transducers receivers The sound velocity in oxygen is lower than in air By measuring the sound velocity in a binary gas mix where the two gases are known air and oxygen the ratio between the gases can be calculated i e O2 concentration The technique for the O2 Sensor is similar to the one in the expiratory cassette with one transducer transmitting an ultrasonic pulse through the gas and the other one receiving the pulse The measured time difference between the transmission and the reception of the pulse is used for calculation of the sound velocity which is then used for calculation of the O2 concentration A temperature sensor inside the O2 Sensor measures the gas temperature and this measurement is used when calculating the O2 concentration Each O2 Sensor is provided with an ID PROM The ID information can be read by the SERVO s System Inspiratory pressure tube The Inspiratory Pressure Tube connects the Inspira tory Pipe with the
13. PUR Polyurethane ABS Acrylicnitrilebutadienstyrene EPDM Ethylenepropylenedienemonomer PTFE Polytetrafluoroethylene FPM Fluororubber NBR Nitrilerubber PP Polypropylene PVC Polyvinyl chloride PS Polystyrene Electronics total 19 5 Battery modules Nickel Metal Hydride Printed circuit boards cables etc Others very small amounts Filter paper of fibre glass 1 Important Revision 02 Service Manual 1 7 SERVO s Ventilator System Important Articles of consumption 1 Bacteria filter 2 Filters for the gas modules 3 Filter for the inspiration pressure transducer 4 Filter for the O2 cell if applicable 5 Nozzle units for the gas modules 6 Battery modules 7 Lithium batteries 8 Expiratory cassette 9 Expiratory cassette membrane 10 O2 cell if applicable 11 Backlight lamps Item 1 Consumption approximately 250 pcs year Items 2 5 Changed approx every 5 000 hours Items 6 Changed approx every 12 500 hours Items 7 Changed approx every 25 000 hours Items 8 11 Changed when needed Power consumption The power consumption depends on the operating mode and whether the internal batteries are being fast or trickle charged Mode Fast charging Trickle charging In operation 70 W 38 W Standby 65 W 33 W Off 35 W 6 W Noise level Less than 50 dBA Packing m
14. User Interface S N 201201 SERVO s S N 02001 and higher There is no difference in the clinical operation between the two versions but the electronics inside the User Interface differs As a consequence some of the spare parts are not compatible between the two versions Further information can be found below and also in the SERVO s Spare Parts List User Interface controls Setting of different parameter input values is made with the help of the following different interface devices Main Rotary Dial rotary encoder with switch Direct Access Knob 4 each rotary encoders Membrane buttons Integrated parts of the Touch screen assembly Touch screen PC 1777 Panel Some features included on PC 1777 Panel are SIMM Single In line Memory Module mounted on its connector P77 Memory type SDRAM PC Card Slot intended for connection insert of a PC Card PC Cards are used to Download software into the different flash memories situated on PC boards marked P and into the EEPROM on PC 1860 Main back plane Transfer patient and system data for further transfer to a computer Service purpose Microprocessor P on this board includes control of the functions of the User Interface ID PROM The ID information can be read by the SERVO s On Off switch Switch to Power up or Power down the SERVO s Refer to section Power supply A new design of the On Off switch
15. 1771 is disconnected user default configurations made via the Field Service System FSS and Pre use check results including transducer calibrations will be erased If the battery on PC 1772 is disconnected all trends all logs and Pre use check results including transducer calibrations will be erased There are two equal battery connectors 2 and 3 on the PC boards Connect the new battery to the un used connector The memory functions are now secured by the new battery Cut the cable ties holding the old battery 4 to the PC board Disconnect and remove the old battery Mount the new battery onto the PC board using new cable ties as shown in the illustration Insert the PC board into the correct PC board slot and reassemble the Patient Unit After any maintenance or service of the SERVO s perform a Pre use check Refer to the SERVO s Ventilator System User s Manual Service procedures SERVO s Ventilator System 5 4 Service Manual Revision 02 5 Enter code 1973 to access the Biomed menues Enters date for a performed Preventive Maintenance into the Service Log Setting time stamp until next PM Reset of breath counter in expiratory cassette User default configuration setup Copy configuration to from PC Card Date and time setup Displayed values Copy configuration Set date and clock O2 cell adaptation Measured O2 concentration will be adapted in relat
16. 1784 Expiratory channel or PC 1772 Monitoring 33 Gas module Air or PC 1772 Monitoring 34 Gas module O2 or PC 1772 Monitoring 35 PC 1772 Monitoring 256 PC 1771 Control 512 PC 1777 Panel 784 N A 27 TECH_ERR_BUZZER_FAILURE 1 Replace PC 1772 Monitoring Note If the Patient Unit main cover is removed this error may be activated 28 PANEL_AUDIO_FAIL 1 Replace the loudspeaker 2 Replace PC 1777 Panel Note If the User Interface rear cover is removed this error may be activated 29 LITHIUM_BATTERY_LOW 1 Replace battery on PC 1772 Monitoring 32 ALARM_ID_MISMATCH N A 33 BRE_NODE_CONNECT_TIMEOUT 1 Replace PC 1771 Control 34 PANEL_NODE_CONNECT_TIMEOUT 1 Check the control cable 2 Replace PC 1777 Panel 3 Replace PC 1862 DC DC amp Standard Connectors Note This error indicates communication failure between PC 1777 and PC 1772 and the error code will thus not be shown on the display but will be logged Troubleshooting SERVO s Ventilator System 6 14 Service Manual Revision 02 6 Error code Error message Possible cause Recommended action 35 EXP_FLOW_MTR_NODE_CONNECT_TIME OUT 1 Replace PC 1784 Expiratory channel 36 N A N A 37 EXP_FLOW_MTR_RANGE_ERR N A 38 BARO_UPPER_LIMIT_EXCEEDED 1 Check calibrate barometer 2 Replace PC 1772 Monitoring 39 BARO_LOWER_LIMIT_EXCEEDED 1 Check calibrate barometer 2 Replace PC 1772 Monitoring N
17. Closed 3 Common 4 Common 10 Revision 02 Service Manual 10 3 SERVO s Ventilator System Diagrams Functional Main Blocks diagram FILTER FILTER TEMP SENSOR EXP INLET EXPIRATORY OUTLET ID ID P4 N45 PC1785 N46 P46 P50 MOD2 P50 MOD1 B PC1786 EXP CHANNEL HEATING FOIL EXP ONE WAY VALVE EXPIRATORY VALVE ULTRASONIC FLOWMETER N41 P41 P40 N40 P24 P M C EXPIRATORY SECTION PNEUMATICS VIEW FROM RIGHT SIDE EXPIRATORY CHANNEL CONNECTOR INSP PRESSURE TRANSDUCER EXP PRESSURE TRANSDUCER PC1781 PC 1781 PC1784 EXPIRATORY CHANNEL PC1785 P45 M C H EXP VALVE COIL EXPIRATORY CASSETTE PRESSURE TRANSDUCERS To PC 1860 P10 To PC 1860 N4 ID ID SYMBOLS N PXX N PXX CONNECTOR CONNECTOR INCLUDING CAN BUS COOLING AIR FLOW MICRO PROCESSOR ID PROM COMMUNICATING WITH MONITORING ID C CONTROL E EXPIRATORY SECTION F EXPIRATORY CHANNEL I INSPIRATORY SECTION M MONITORING P POWER SUPPLY T PRESSURE TRANSDUCERS U USER INTERFACE FUNCTIONAL MAIN BLOCKS N16 P1 N15 N18 P18 O2 CELL INSPIRATORY SECTION INSP OUTLET N10 GAS MODULE O2 GAS MODULE AIR AIR INLET SAFETY VALVE SAFETY VALVE PULL MAGNET PC1861 PNEUMATIC BACK PLANE C C M C M P19 N19 CONNECTOR MUFF INSP PRESS TUBE EXP PRESS TUBE N17 P17 INSPIRATORY PIPE SAFETY OUTLET O2 IN
18. Functional Main Blocks diagram marking I The main block Inspiratory Section conveys the breathing gas from its gas inlets for Air and O2 supply to the patient breathing system It comprises the following main functions Gas Modules Air and O2 Connector Muff Inspiratory Pipe O2 Sensor cell Inspiratory Pressure Tube Safety Valve including pull magnet Inspiratory Outlet PC 1861 Pneumatic Back Plane Gas modules Air and O2 The Air and O2 Gas Modules regulates the inspiratory gas flow and gas mixture 1 Filter 2 Inspiratory valve temperature sensor 3 Supply pressure transducer 4 Flow transducer Delta pressure transducer and net 5 Nozzle unit with valve diaphragm 6 Inspiratory solenoid The Gas Modules are factory calibrated Each Gas Module must not be disassembled further than described in chapter Preventive maintenance ServoS 9018 3 3 4 Service Manual Revision 02 Description of functions SERVO s Ventilator System Gas inlet Gas supply is connected to the ventilators gas inlet nipples The design of the gas inlet nipples vary according to the standard chosen Gas is to be connected from hospital central gas supply or from gas cylinders The Air supply may be connected from a compressor for medical air Filter The Filter protects the ventilator from particles in the gas delivered to the Gas Modules The filter must be replaced dur
19. Inspiratory Pressure Transducer A bacteria filter protects the pressure transducer on PC 1781 Pressure Transducer from contamination Maintenance including exchange of bacteria filter according to User s manual The bacteria filter must also be replaced during the Preventive maintenance 3 3 6 Service Manual Revision 02 Description of functions SERVO s Ventilator System Safety valve The movable axis of the Safety Valve Pull Magnet controls the opening and closing of the safety valve membrane in the Inspiratory Pipe The pull magnet is electrically activated closed from the main block Expiratory Channel When the Safety Valve is not activated the weight of the pull magnet axis in combination with the design of the valve membrane pushes the pull magnet axis downwards This actuates the Safety Valve to be opened and the inspiratory gas is let out from the Inspiratory Pipe via the Safety Outlet thus enabling a decrease in the inspiratory pressure The Safety Outlet is covered by a plastic grid This is normal safety pop off function The opening conditions for the safety valve are The ventilator is switched Off or to Standby The pressure inside the inspiratory pipe is 5 cm H2O above the preset Upper Pressure Alarm limit This condition is controlled by the Monitoring subsystem The pressure inside the inspiratory pipe is 7 cm H2O above the preset Upper Pressure Alarm limit This condition is co
20. PC 1771 Control 5 Replace PC 1772 Monitoring SERVO s Ventilator System Troubleshooting Revision 02 Service Manual 6 9 6 Test Test description Recommended action if the test fails Flow transducer test Checks the inspiratory flow transducer Calibrates and checks the expiratory flow transducer Calibrates at 60 O2 and checks at 100 and 21 O2 As different gas mixtures are used during this test calibration of the expiratory flow transducer will only be performed if both gases are connected The check using the connected gas 100 alt 21 O2 will however be performed The Flow transducer test will pass if the result of this check corresponds to the old calibration factor from a previous Pre use check The same expiratory cassette must be used The new calibration factor for the expiratory flow transducer may not differ more than 10 to 15 from factory calibration During this test the different subsystems concerned are compared The difference between the subsystems must not be more than 0 3 l min BRE MON 1 Check that the connected gas supply pressure Air and O2 is within the specified range 2 Check the expiratory cassette Check that the cassette is correctly seated in the cassette compartment If possible replace the expiratory cassette and check if the new cassette is accepted by the Pre use check If the new cassette was accepted by the Pre use c
21. PC boards The SERVO s System SW is distributed on different subsystems located on the following PC boards PC 1771 Control PC 1772 Monitoring PC 1784 Expiratory Channel PC 1777 Panel When delivered as spare parts these PC boards are equipped with a System SW version that may differ from the version on the unit to be repaired To keep the System SW version used prior to the PC board replacement the applicable System SW version must be available on a PC Card for re installation purposes For functionality enhancement the latest released System SW version is always recommended Before installing a new System SW version on a unit ensure that the software is fully compatible with all HW SW and mechanical components in the unit If any compatibility conflicts are apparent this will be noted on the MCC SW download website Assembling guidelines All parts of the unit assembled with screws and nuts are tightened with a specified torque In the User Interface some of the screws are also secured with threadlocking adhesives as noticed during disassembling In order to maintain these specifications over time it must be ensured that after any service intervention removed parts are re assembled and secured according to instructions Make sure to follow the guidelines stated below Tightening torque Thread size M3 0 95 0 05 Nm Thread size M4 M6 3 1 0 1 Nm Threadlockin
22. Revision 02 Service Manual 7 5 SERVO s Ventilator System Preventive maintenance Internal fan filter Remove the internal fan filter 1 Check if the filter is damaged Replace damaged filter If not damaged clean the filter The filter can be rinsed in water Shake out and make sure that the filter is free from excess water Mount the new cleaned filter Internal fan Connect the mains power cable Set the On Off switch to Standby The temperatur sensor controlling the Internal fan is mounted on PC 1863 Power control Carefully warm up PC 1863 2 and check that the Internal fan starts Use e g a light bulb or a heat fan to warm the PC board The Internal fan will start at approx 33 C 91 F with half effect 43 C 109 F with full effect Note The temperature must not exceed 70 C 158 F It is also possible to check the Internal fan by running the unit in a ventilation mode and wait until the Internal fan starts If this test method is used the main cover must be mounted in order to raise the temperature inside the compartment Expiratory cassette Remaining operating capacity in for the membrane can be shown in the Status window Select Status Exp cassette to check Remaining membrane capacity When this capacity limit is passed or if the membrane for some reason has become defective it must be replaced Refer to instructions in chapter
23. ServoS 9066 ServoS 9067 ServoS 9068 ServoS 9069 4 Revision 02 Service Manual 4 21 SERVO s Ventilator System Disassembling and assembling Expiratory cassette membrane The expiratory cassette is a complete unit and must not be disassembled The only part that can be replaced is the valve membrane Operating capacity for the membrane is estimated to 10 000 000 breathing cycles When this limit is passed or if the membrane for some reason has become defective it must be replaced Remaining operating capacity in for the membrane can be shown in the Status window Select Status Exp cassette to check Remaining membrane capacity The operating capacity meter must be reset after replacement of the membrane Note If the metal washer has been separated from the membrane it is important that the washer is correctly mounted Washers of old version have a raised hub 1 that must be facing outwards as shown in the adjacent illustration Washers of new version do not have this raised hub and can be mounted in both directions To remove the valve membrane from the cassette Carefully remove the membrane including retaining ring using a suitable retaining ring pliers To mount the valve membrane into the cassette Place the retaining ring 2 correctly into the membrane It is very important that the valve membrane and the membrane seat in the cassette is clean Dirt particles can cr
24. and the switch cover was introduced Q2 2007 Refer to chapter Disassembling and assembling for further information Connection for PC P86 Ethernet port intended for test and service purpose Connected via a service cable For future options Microphone used to monitor sounds from the Loudspeaker There are two different versions of PC 1777 Type 1 and Type 2 The PC 1777 spare part is not compatible between the two versions For PC 1777 of Type 2 System SW version V2 00 04 or higher is required Note The System SW must be re installed if PC 1777 is replaced Loudspeaker For generation of sound e g alarm Connected to P72 on PC 1777 Panel The loudspeaker generates different tones with individual sound volumes At startup and during Pre use check the function of the loudspeaker is monitored by the microphone on PC 1777 During operation it is continuously monitored through current sensing With the optional accessory Loudspeaker booster kit the alarm sound is amplified Refer to section Optional equipment 3 Revision 02 Service Manual 3 3 SERVO s Ventilator System Description of functions Backlight Inverter PC board with driving stage for backlight lamps mounted behind the TFT Display The supply voltage delivered by the Backlight Inverter is 660 V The Backlight Inverter is connected to P73 on PC 1777 Panel There are two different versions of the Backlight Inverter Type 1 and
25. battery on PC 1771 Control 10002 BRE_I2C_ERROR 1 Replace PC 1771 Control 10003 BRE_FATAL_MEMORY_ERROR 1 Restart the unit 2 Replace PC 1771 Control Panel 20001 PANEL_DEVICE_ERROR 1 Replace PC 1777 Panel 20002 PANEL_BACKLIGHT_BROKEN This error message may also be logged immediately before the No battery capacity alarm when the unit is running in battery mode If the display is lit and the error code is shown on the display 1 Replace PC 1777 Panel If the display is not lit the display is dark 1 Replace backlight lamps 2 Replace PC board Backlight Inverter Note If one of the lamps is broken the other lamp will automatically be switched off Thus with a failure on a backlight lamp or likely also on PC board Backlight Inverter the User Interface display will become dark This error code will in such case not be possible to see but will be logged 20003 PANEL_BUTTON_STUCK 1 Restart the unit Do not touch the User Interface during system startup Interfering with the knobs keys touch screen loudspeaker grid etc may affect the internal technical tests 2 Check the user interface membrane buttons FSS 3 Replace the touch screen 4 Replace PC 1777 Panel 20004 PANEL_AUDIO_FAILED 1 Restart the unit Do not touch the User Interface during system startup Interfering with the knobs keys touch screen loudspeaker grid etc may affect the internal technical tests
26. equipped with a mechanical key to prevent that the O2 Sensor is mounted on wrong type of Inspiratory pipe The O2 cell can be used on both versions of the Inspiratory pipe 3 Revision 02 Service Manual 3 5 SERVO s Ventilator System Description of functions O2 cell The O2 cell is mounted in a housing on the Inspiratory Pipe and is protected by a bacteria filter Maintenance including exchange of bacteria filter according to the User s manual The bacteria filter must also be replaced during the Preventive maintenance The O2 cell gives an output voltage proportional to the partial pressure of oxygen inside the Inspiratory pipe At constant ambient pressure this output is proportional to the O2 concentration in percent In each O2 cell the output signal will stay at a fairly constant level usually within 10 17 mV in normal air and at standard barometric pressure during the life time of the cell The life time of the cell is affected by the O2 concentration With a concentration at the cell in and expected cell life time in hours the following applies at 25oC 77oF O2 Conc x Expected cell life 500 000 hours The O2 cell is automatically calibrated each time a Pre use check is performed if O2 is connected to the ventilator If the ventilator has continually been in use for a long time the measured O2 concentration may drop due to normal degradation of the O2 cell This will activate a nuisance alarm
27. expiratory cassette compartment Includes an ID PROM The ID information can be read by the SERVO s 3 3 8 Service Manual Revision 02 Description of functions SERVO s Ventilator System PC 1785 Expiratory channel connector The PC 1785 Expiratory Channel Connector is a connector board including signal filters that is mounted in the expiratory cassette compartment It connects to PC 1786 mounted in the Expiratory Cassette when the cassette is docked to the expiratory cassette compartment PC 1860 Main back plane Interconnection board for the PC boards in the left side part of the patient unit The ventilators System ID Serial No configuration operating time etc is stored in an EEPROM on PC 1860 Thus when replacing PC 1860 a spare part that is factory programmed for the concerned ventilator must be used As the preventive maintenance time stamp will be reset when replacing PC 1860 a new time stamp must be set via the Biomed menu In order to make this new time stamp correct the preventive mainte nance must be performed Refer to chapter Pre ventive maintenance Pressure transducers Functional Main Blocks diagram marking T PC 1781 Inspiratory pressure transducer The pressure conveyed via the pressure tube connected to this block is led to and measured by its differential pressure transducer With differential reference to the ambient pressure the output signal is proportional to the measure
28. fault 5 Replace the expiratory cassette 6 Replace PC 1785 Expiratory channel connector 7 Replace PC 1784 Expiratory channel If technical alarm Expiration flow meter Exp cassette power failure is present 1 Replace PC 1862 DC DC amp Standard Connectors 7 Revision 02 Service Manual 7 1 SERVO s Ventilator System Preventive maintenance 7 Preventive maintenance General 7 2 Preparations 7 2 Equipment 7 2 Preventive maintenance 7 3 Maintenance kit 5 000 hours 7 3 Performing the Preventive maintenance 7 3 Only personnel trained and authorized by MAQUET shall be permitted to perform installation service or maintenance of the SERVO s Make sure to prepare the SERVO s properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted in a log book After any installation maintenance or service intervention in the SERVO s perform a Pre use check Refer to the SERVO s Ventilator System User s Manual for details This product contains electronic and electrical components Discard disposable replaced and left over parts in accordance with appropri
29. for the expiratory pressure transducer The new gain factor may not differ more than 5 from factory calibration During this test the different subsystems concerned are compared The difference between the subsystems must not be more than 1 cm H2O at 60 cm H2O Expiratory valve coil test Measures offset and gain in the valve coil BRE MON Check the Test results log in the More detailed mode FSS If Pressure transducer test failed 1 Check the expiratory cassette If possible replace the expiratory cassette and check if the new cassette is accepted by the Pre use check If the new cassette was accepted by the Pre use check the fault was located to the cassette The fail with the old cassette may in this case be due to water collected at the pressure transducer filter inside the cassette Dry the old cassette properly 2 Check replace PC 1781 Pressure transducer Insp and Exp To locate the faulty pressure transducer replace one transducer at a time 3 Replace PC 1771 Control 4 Replace PC 1772 Monitoring If Expiration valve test failed 1 Check the expiratory cassette If possible replace the expiratory cassette and check if the new cassette is accepted by the Pre use check If the new cassette was accepted by the Pre use check the fault was located to the cassette To repair the old cassette check that the expiratory valve membrane
30. is clean and correctly seated in the cassette Replace the membrane if required 2 Replace the Expiratory valve coil Troubleshooting SERVO s Ventilator System 6 8 Service Manual Revision 02 6 Test Test description Recommended action if the test fails Safety valve test Checks and if necessary adjusts the opening pressure for the safety valve to 117 3 cm H2O Checks the hardware signals related to the safety valve functions BRE MON 1 Check the inspiratory section Check that the inspiratory pipe is correctly mounted in inspiratory section Check that the safety valve membrane is clean and correctly seated in the inspiratory pipe 2 Replace the safety valve pull magnet 3 Replace PC 1784 Expiratory channel 4 Replace PC 1772 Monitoring O2 cell sensor test Calibrates and checks the O2 Sensor cell at 21 O2 and 100 O2 Checks if the O2 cell is worn out As different gas mixtures are used during this test calibration and check of O2 Sensor cell will not be performed if one gas is missing The O2 Sensor test requires 21 O2 and 100 O2 If other gas mixtures are used e g O2 supply delivers 96 O2 instead of 100 the O2 cell sensor test may fail BRE MON 1 Check that the connected gas supply pressure Air and O2 is within the specified range 2 Replace the O2 Sensor cell 3 Replace the gas modules Replace one gas module at a time 4 Replace
31. C 1772 is disconnected or if the battery voltage is too low all logs and Pre use check results including transducer calibrations will be erased The lithium batteries must be replaced after 5 years PC 1784 Expiratory channel Functional Main Blocks diagram marking F The main block Expiratory channel comprises microprocessor control to achieve measurement of expiratory flow The output signal Exp Flow is used in the main block Control Electronics including microprocessor P for handling of All electronic connections to and from the Expiratory Section functions Measurement of airway pressures in both Inspiratory Section and Expiratory Section Control of the Safety Valve functions in the Inspiratory Section A thermistor on PC 1784 monitors the temperature inside the Patient Unit An alarm is activated if the temperature is 77 5 C 170 9 F or higher Includes an ID PROM The ID information can be read by the SERVO s Note The System SW must be re installed if PC 1784 is replaced Power supply Functional Main Blocks diagram marking P The main block Power Supply comprises conversion of mains power to internal power supply as well as connections for the Battery modules The power modes in the SERVO s System are At Power up i e when the On Off switch is turned On all internal voltages will be enabled At Power down the Power supply system will deactivate the hardwar
32. EPROM Checksum EEPROM Panel button stuck test Audio test BRE MON PAN 1 Restart the unit Do not touch the User Interface during system start up Interfering with the knobs keys touch screen loudspeaker grid etc may affect the internal technical tests 2 Reinstall the System SW Start Pre use check Internal tests Audio test MON PAN Alarm output connector test Performed only if this option is installed MON Power failure test MON If possible check the Test results log in the More detailed mode FSS If the audio test failed 1 Make sure that the Patient Unit main cover and the User Interface rear cover are correctly mounted Otherwise the audio tests may fail 2 Check in the Test results log FSS if it was the Panel test or the Monitoring test that failed If the Monitoring test failed Replace PC 1772 Monitoring If the Panel test failed Replace the loudspeaker or PC 1777 Panel Troubleshooting SERVO s Ventilator System 6 4 Service Manual Revision 02 6 Test Test description Recommended action if the test fails Internal tests continued If the Alarm output connector test failed 1 Replace PC 1862 DC DC amp Standard Connectors 2 Replace PC 1772 Monitoring If the power test failed 1 Replace PC 1772 Monitoring Barometer test Checks that the barometric pressure measured
33. ERVO s software structure SW Service Release information added Trend information added 3 2 Memory types used in SERVO s SW Service Release information added Trend information added 3 2 User Interface User Interface Type 2 information added 3 2 PC 1777 Panel PC 1777 Type 2 information added 3 2 Loudspeaker Loudspeaker booster kit information added 3 3 Backlight Inverter Backlight Inverter Type 2 information added 3 3 Touch screen including frame Touch screen including frame Type 2 information added 3 3 TFT Display with Backlight TFT Display with Backlight Type 2 information added 3 6 Expiratory cassette Cassette design information changed Q1 2005 3 8 PC 1784 Expiratory channel Thermistor information corrected 3 9 PC 1772 Monitoring Trend information added 3 9 Power supply Internal DC supply voltage and Power supply selection information corrected 3 9 PC 1862 DC DC amp Standard connectors N26 information regarding alarm corrected 3 10 PC 1862 DC DC amp Standard connectors P63 information regarding Alarm output connector corrected SERVO s Ventilator System Service Manual revision history Revision 02 Service Manual 9 3 9 3 10 Battery modules Battery module functional description changed 3 10 Control cable Connect disconnect information corrected 4 3 User Interface User Interface Type 2 information added 4 4 PC 1777 Panel PC 1777 Type 2 information adde
34. LET ID ID F I E T N70 P72 P73 P75 P71 P80 P79 P77 P74 P81 P82 P83 P84 P85 P86 P78 P76 PC1777 PANEL PC CARD SLOT SW1 SW2 BACK LIGHT PANEL VIEW FROM REAR SIDE CONNECTION FOR PC SERVICE X1 ID PC1863 POWER CONTROL N22 P32 N32 N7 P7 N92 P92 P9 N28 FUSE F1 P63 N29 N9 P5 N5 P31 N31 N4 P10 P P C DC DC amp STANDARD CONNECTORS PC1771 CONTROL PC1772 MONITORING PC 1860 MAIN BACK PLANE X2 BP PS1 X1 ID ID ID ID ID ID N21 BATTERY N22 P23 P23 P21A B N21 P21A B BATTERY TO PC 1861 N10 TO PC 1784 P4 ELECTRONICS VIEW FROM REAR SIDE AC DC CONVERTER P N INTERNAL FAN EQUIPOTENTIAL PIN LEFT SIDE P1 N1 P2 N2 N26 P M C P P P U P1 ServoS 07 05 22 A CASSETTE ID P14 N14 P P P MAINS INLET amp FUSES ID PC1862 TEMP SENSOR N18 P18 TEMP SENSOR O2 SENSOR P19 N19 INSPIRATORY PIPE ID I BATTERY MODULE BATTERY MODULE Maquet Critical Care AB SE 171 95 Solna Sweden Phone 46 8 730 73 00 www maquet com criticalcare For local contact Please visit our website www maquet com GETINGE GROUP is a leading global provider of equipment and systems that contribute to quality enhancement and cost efficiency within healthcare and life sciences Equipment services
35. O2 cell corrected O2 Sensor added 1 7 Environmental declaration Product End of Life information added 2 3 Descriptions of optional equipment Support Arm 176 added Humifier Holder for rail added Loudspeaker booster kit added Isolation shield with drip guard added 2 4 User Interface On Off switch and switch cover information in text and illustration added 2 7 Patient Unit O2 Sensor information in text and illustration added 2 9 Monitoring O2 Sensor information added 3 2 Memory types used in SERVO s O2 Sensor information added 3 2 PC 1777 Panel On Off switch and switch cover information added 3 2 Loudspeaker Loudspeaker booster kit information moved to section Optional equipment 3 4 Inspiratory pipe O2 Sensor information added 3 5 O2 Sensor O2 Sensor functional description added 3 10 PC 1862 DC DC amp Standard connectors P63 Alarm output connector information moved to section Optional equipment 3 12 Optional equipment Alarm output connector information extended and moved from section PC 1862 DC DC amp Standard connectors Loudspeaker booster kit information extended and moved from section Loudspeaker Isolation shield with drip guard added SERVO s Ventilator System Service Manual revision history Revision 02 Service Manual 9 5 9 4 3 User Interface On Off switch cover information added Threadlocking adhesive information corrected Text regard
36. Remove the main cover Remove the screws 1 on the rear panel Carefully pull out and lift off PC 1862 2 PC 1860 Main back plane To remove PC 1860 Remove the main cover Remove the Battery modules PC 1771 Control PC 1772 Monitoring PC 1863 Power control PC 1862 DC DC amp Standard connectors Internal fan Disconnect the converter cable 1 Remove the screws 2 PC 1784 Expiratory channel and PC 1861 Pneu matic back plane is connected to the rear side of PC 1860 Carefully pull out and lift off PC 1860 3 Note The ventilators System ID configuration operating time etc is stored in an EEPROM on PC 1860 Thus when replacing PC 1860 a spare part that is factory programmed for the concerned ventilator must be used For further information refer to chapter Description of functions ServoS 9051 ServoS 9052 ServoS 9053 ServoS 9054 ServoS 9061 4 4 18 Service Manual Revision 02 Disassembling and assembling SERVO s Ventilator System Internal fan To remove the internal fan Remove the main cover Remove PC 1862 DC DC amp Standard connectors to make the internal fan cable connector accessible Remove the internal fan filter While holding the internal fan remove the screws 1 Disconnect the internal fan cable connector 2 Lift off the internal fan Note An arrow on the
37. S 9022 Type 1 PC 1777A D ServoS 9020 Type 2 PC 1777F or higher A new design of the On Off switch was introduced Q2 2007 This switch also requires a new version of the switch cover Refer to illustrations below With this new design the switch cover will be kept open when the switch is Off and will be closed only when the switch is On PC 1777 Panel when delivered as spare part will be equipped with the new design of the On Off switch The spare part will thus also include a new switch cover to be mounted on the User Interface 4 Revision 02 Service Manual 4 5 SERVO s Ventilator System Disassembling and assembling Disassembling Installation of the replacement kit must be performed in a clean and dustfree environment as the TFT Display is sensitive to contaminations Separate the front panel section from the rear cover Remove the loudspeaker 3 from the support plate Remove PC board Backlight Inverter 4 from the support plate 5 Remove the support plate including PC 1777 Panel 6 and TFT Display 7 from the front panel section Remove the TFT Display from the support plate Discard the old PC 1777 the support plate and the PC 1777 TFT Display cable of Type 1 Assembling Check type and version of the TFT Display 7 Adapt the setting of the DIP switch 8 on the new PC 1777 to the TFT Display Refer to section TFT Display below Mo
38. SERVO s Ventilator System Service Manual 1 2 Service Manual Revision 02 Important SERVO s Ventilator System Notes Revision 02 Service Manual 1 3 SERVO s Ventilator System Important Contents Contents 1 Important 2 Introduction 3 Description of functions 4 Disassembling and assembling 5 Service procedures 6 Troubleshooting 7 Preventive maintenance 8 Index 9 Service Manual revision history 10 Diagrams 1 2 3 4 5 6 7 8 9 10 1 4 Service Manual Revision 02 Important SERVO s Ventilator System Installation Only personnel trained and authorized by MAQUET shall be permitted to install the SERVO s The installation and handing over procedures are described in the SERVO s Ventilator System Installation Instructions Functional check After any installation maintenance or service inter
39. Type 2 The Backlight Inverter spare part is not compatible between the two versions Touch screen including frame The Touch screen implies the touch function of the front panel screen and is interactive with information displayed on the TFT Display The front panel frame with the touch screen membrane buttons and DIM sensor forms the assembly Touch screen incl frame and must be handled as one complete part The DIM sensor measures the ambient light and the screen brightness is automatically adjusted There are two different versions of the Touch screen incl frame Type 1 and Type 2 The Touch screen incl frame spare part is not compatible between the two versions TFT Display with Backlight The TFT Display is a Thin Film Transistor Screen for color display of picture and alphanumeric data There are two different versions of the TFT Display Type 1 with Backlight consisting of two separate fluorescent lamps mounted behind the TFT Screen Type 2 with Backlight consists of one fluorescent lamp mounted behind the TFT Screen The TFT Display spare part is not compatible between the two versions The Backlight lamps are driven from the Backlight Inverter Estimated lifetime with acceptable brightness level for the lamps is 30 000 hours Using the Field Service System FSS a time meter for the lamps can be shown The time meter must be reset after replacement of the lamps Patient unit Inspiratory section
40. ained and authorized by MAQUET shall be permitted to perform installation service or maintenance of the SERVO s Make sure to prepare the SERVO s properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted in a log book After any installation maintenance or service intervention in the SERVO s perform a Pre use check Refer to the SERVO s Ventilator System User s Manual for details This product contains electronic and electrical components Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards 8 8 2 Service Manual Revision 02 Index SERVO s Ventilator System A AC DC Converter 2 7 3 10 4 16 Aeroneb Pro 2 3 Alarm output connector 2 3 2 6 3 12 10 2 Assembling guidelines 4 2 B Backlight Inverter 2 5 3 3 4 3 4 6 Backlight lamps 2 5 3 3 4 3 4 9 Bacteria filter for O2 cell 7 4 Barometric pressure 7 6 Battery modules 2 7 3 11 4 16 5 2 7 6 Biomed key 5 4 Breathing SW 2 9 C Cable reel 2 4 Change access code 5 5 Compressor Mini 2 3 Connector muff 2 7 3 4 4 15 Control cable 2 4 3 10 4 22 Control cable connector 2 6 10 2 Copy configuration 5 5 D Direct access controls knobs 2 4 2 5 Display with touch screen 2 4 E EEPROM 3 2 Edit configuration 5 5 Environmental declaration 1 6 Equipotentiality terminal 2 6 ESD protection 1 4
41. and tech nologies are supplied under the brands ARJO for patient hygiene patient handling and wound care GETINGE for infection control and prevention within healthcare and life science and MAQUET for Surgical Workplaces Cardiopulmonary and Critical Care Maquet Critical Care AB 2003 2007 All rights reserved MAQUET reserves the right to modify the design and specifications contained herein without prior notice Order No 66 28 825 Revision 02 May 2007 Price group 7 Printed in Sweden
42. arding General and Units cannot be changed in this window Access to the Field Service System FSS is required Displayed values The Measured value boxes on the User Interface shows different parameters Some of these parameters are fixed and some are selectable in this window NIV alarms Default NIV alarms can be changed in this window Pressure Upper alarm limit Minute Volume Lower and Upper alarm limit Respiratory Rate Lower and Upper alarm limit End Exp Pressure Lower and Upper alarm limit The alarms listed above except Pressure alarm can be permanently silenced in this window Default configuration regarding General and Units cannot be changed in this window Access to the Field Service System FSS is required Startup configuration Requires Software Version 3 Startup configuration can be changed in this window Type of ventilation Volume setting Breath Cycle setting Pre post oxygenation conc above set O2 conc Copy configuration Available only in Standby mode Default user configuration can be copied to from a PC Card Default configuration regarding General Units and Alarm limits will be copied Useful when applying the same user configuration on a number of units Set date and clock Available only in Standby mode Date and time setting can be changed in this window Change access code Available only in Stand
43. are is divided into the following software subsystems Breathing Monitoring Panel System ID Breathing The Breathing SW controls the delivery of gases to the patient This subsystem is responsible for the breathing system that is Ventilation control and regulation Inspiratory channel Expiratory channel The Breathing SW is stored on PC 1771 Control and PC 1784 Expiratory Channel The software must be re installed if PC 1771 or PC 1784 is replaced New software can be installed via a SW Service Release The Breathing SW is executed by microprocessors on PC 1771 and PC 1784 Monitoring The Monitoring SW controls all monitoring and alarm functions in the system including trends of measured values trend data not available in SERVO s v1 0 Events such as alarms and change of settings will also be logged The Monitoring SW is stored on PC 1772 Monitoring The software must be re installed if PC 1772 is replaced SW related to Monitoring is also stored in the O2 Sensor New software can be installed via a SW Service Release The Monitoring SW is executed by the microprocessor on PC 1772 Panel The Panel SW controls all user interaction as well as software updating to all subsystems via the PC Card interface The Panel SW is stored on PC 1777 Panel The software must be re installed if PC 1777 is replaced New software can be installed via a SW Service Release The Panel SW
44. ate industrial and environmental standards 7 7 2 Service Manual Revision 02 Preventive maintenance SERVO s Ventilator System General A Preventive maintenance must be performed at least once every year as long as the unit is not used more than normal Normal operation is estimated to correspond to approx 5 000 hours of operation The life span for the Battery module is calculated to two and a half year from manufacturing date Normal time for logistics and storage are included in this calculation The calculation corresponds thus to an estimated operational time of two years Manufacturing date year week is printed on the battery label The internal Lithium batteries on PC 1771 and PC 1772 shall be replaced every five years It is recommended that a regular cleaning and an extended cleaning of the inspiratory channel should be performed before carrying out Preventive maintenance Refer to instructions in the User s Manual In some parts of the Preventive maintenance as described in this chapter access to the Field Service System FSS is required Some optional equipment used with the SERVO s but not covered by this Service Manual may also demand maintenance actions Refer to the optional equipments documentation Example on such optional equipment are Humidifier Compressor Mini Preparations Make sure that the SERVO s works properly before performing any maint
45. aterials The amounts of packing materials will vary depending on customer adaptation Materials for packing Loading pallet Fulfils the USA requirements 7 CFR 319 40 May 25 th 1995 Corrugated cardboard Shock absorbing material of expanded poly ethylene EPE or expanded polypropylene EPP Product End of Life For scrapping information refer to the document SERVO s Ventilator System Product End of Life Disassembly Instructions 1 Important 1 8 Service Manual Revision 02 Important SERVO s Ventilator System Notes 1 2 Revision 02 Service Manual 2 1 SERVO s Ventilator System Introduction 2 Introduction Main units 2 2 User Interface 2 4 Patient Unit 2 6 SERVO s software structure 2 9 General 2 9 Breathing 2 9 Monitoring 2 9 Panel 2 9 System ID 2 9 Only personnel trained and authorized by MAQUET shall be permitted to perform installation service or maintenanc
46. be noted in a log book After any installation maintenance or service intervention in the SERVO s perform a Pre use check Refer to the SERVO s Ventilator System User s Manual for details This product contains electronic and electrical components Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards Service procedures SERVO s Ventilator System 5 2 Service Manual Revision 02 5 Battery modules System SW version V2 01 00 or higher includes an improved monitoring of the battery status Select Status Batteries on the User Interface to check battery status Refer to the illustrations below On ventilators with this improved battery monitoring the batteries condition and capacity are verified during the Pre use check and also continuously during operation of the unit No further functions checks of the batteries are required With this improved battery monitoring the Battery status window shows Usable backup time Calculated as the sum of the estimated backup time for the connected Battery modules reduced with 10 minutes as an extra safety feature Slot number Note that slot 1 is the lower slot and slot 2 is the upper Battery module S N Charge indicator for each battery where 0 boxes filled lt 10 relative charge 1 box filled 10 25 relative charge 2 boxes filled 26 50 relative charge 3 boxes fill
47. by mode Access code to the Biomed menu can be changed in this window O2 cell adaptation Available only during ventilation in units with O2 cell Adjustment of the O2 concentration reading Refer to the SERVO s Ventilator System User s Manual for further information Service procedures SERVO s Ventilator System 5 6 Service Manual Revision 02 5 Software installation General Before starting any SW Upgrade or Update check Installed System SW version see System SW version in the Status General window System SW version stored on the PC Card It is not recommended to install System SW with lower version number than already installed in the SERVO Ventilator System After any installation maintenance or service intervention in the SERVO s perform a Pre use check according to instructions in the SERVO s Ventilator System User s Manual Software information There are two different intentions for software installation SW Update A SW Update will install a new System SW version in the SERVO Ventilator System SW Updates are not dependent on the serial number of the ventilator and will not alter the installed SW Options SW Upgrade A SW Upgrade will change the function of the SERVO Ventilator System A SW Upgrade is individually created for each ventilator and can only be installed on this ventilator S N of the ventilator must be stated when ordering a SW Upgrade
48. by the internal barometer is within 630 1080 hPa Checks that the measured barometric pressure values differs less than 8 hPa between BRE and MON BRE MON Check the Barometric pressure value in the Status window If that value is within 630 1080 hPa 1 Replace PC 1771 Control 2 Replace PC 1772 Monitoring 3 Replace PC 1784 Expiratory channel 4 Replace the gas modules Replace one gas module at a time If that value is outside 630 1080 hPa 1 Replace PC 1772 Monitoring Gas supply pressure test Checks that the gas supply pressures Air and O2 measured by the internal gas supply pressure transducers are within 200 650 kPa 2 0 6 5 bar Checks that the measured supply gas pressure values differs less than 20 mbar between MON and BRE BRE MON 1 Check that the connected gas supply pressure Air and O2 is within the specified range 2 Start the unit in a ventilation mode and check the alarms If an Air supply pressure alarm is activated replace the Gas module Air If an O2 supply pressure alarm is activated replace the Gas module O2 3 Replace PC 1771 Control 4 Replace PC 1772 Monitoring SERVO s Ventilator System Troubleshooting Revision 02 Service Manual 6 5 6 Test Test description Recommended action if the test fails Internal leakage test Checks the internal leakage with test tube connected using the inspiratory and expiratory pres
49. ce intervention in the SERVO s perform a Pre use check Refer to the SERVO s Ventilator System User s Manual for details This product contains electronic and electrical components Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards Service Manual revision history SERVO s Ventilator System 9 2 Service Manual Revision 02 9 Revision 01 Revision history table Revision 01 In the table below the following keywords are used in Comment column Added Information added to the manual e g due to new functionality Changed Information changed in the manual e g due to changed functionality Corrected Corrections made due to printing errors or lack of information in the previous version of the manual Page Section Comment 1 4 Symbols used in this manual Texts corrected 1 5 Service Battery module replacement interval changed Texts regarding worn out batteries and other disposable parts corrected 1 6 Environmental declaration Battery modules information corrected 1 7 Articles of consumption Item 6 and 7 replacement interval changed 2 3 Descriptions of optional equipment Information regarding Aeroneb Pro added 2 4 User Interface User Interface Type 2 information added 2 6 Patient Unit Serial number information corrected 2 8 Expiratory cassette PC 1786 information corrected 2 9 S
50. correctly ServoS 9096 4 4 10 Service Manual Revision 02 Disassembling and assembling SERVO s Ventilator System Touch screen including frame The illustration shows Type 1 but the procedure for Type 2 is the same To remove the Touch screen including frame 1 Lift off the TFT Display Refer to section TFT Display Remove the Main rotary dial 2 Pull off the Main rotary dial knob Remove the nut holding the Main rotary dial Lift off the Main rotary dial Remove the Direct access controls 3 Remove the cover on each Direct access control knob Loosen the nut on each knob and pull off the knobs Remove the nut holding each Direct access control and lift off the controls Note When mounting the Main rotary dial and the Direct access controls on a new Touch screen incl frame make sure that the knobs are easy to turn Label strips The Touch screen including frame is delivered with label strips which have to be mounted before the unit is taken into operation Protective foils 1 separate the adhesive areas between the front panel film and the front panel Mount the label strips as follows Select the two appropriate label strips One label strip for the Fixed keys on the upper right hand area and One label strip for the Special functions keys on the lower right hand area of the User Interface Fixed keys label Insert the fix
51. cted by a filter that must be cleaned or replaced during the Preventive maintenance Control cable This Control cable connects the Patient Unit and the User Interface The cable can be partly winded up under a rubber cover on the rear of the User Interface Note The Control cable must only be connected or disconnected when the ventilator is switched Off 3 3 12 Service Manual Revision 02 Description of functions SERVO s Ventilator System Optional equipment Alarm output connector optional The Alarm output connector P63 is integrated in PC 1862 DC DC amp Standard connectors and mounted on all units The Alarm output option must however be enabled in the configuration software to access this function The Alarm output connector enables connection of an external alarm signal system to the SERVO s High and medium priority alarms are transferred and the alarm output signal is active as long as the audio alarm is active on the ventilator The Alarm output connector has two contact functions NO Normally Open and NC Normally Closed In an alarm situation the open contact will close and the closed one will open The contacts are independent of polarity and can be used both with AC and DC systems Pin configuration and signal names in P63 Alarm output connector can be found in chapter Diagrams For further information refer to the Alarm output connector Reference Manual Loudspeaker booster k
52. ctions Isolation shield with drip guard Isolation shield with drip guard Installation Instructions 2 2 4 Service Manual Revision 02 Introduction SERVO s Ventilator System User Interface Items accessible from the outside of the User Interface are shown in the above illustration 1 Display with touch screen 2 Fixed keys for immediate access to special windows 3 Main rotary dial 4 Special function keys 5 Direct access knobs 6 Mains indicator green 7 Standby indicator yellow 8 Start Stop Standby ventilation key 9 Luminescence detector adjusts display brightness automatically On User Interface of Type 1 the detector is placed in the upper left corner On User Interface of Type 2 the detector is placed above the Fixed keys in the upper right corner ServoS 9002 10 Loudspeaker grid 11 Cable reel 12 PC card slot with slot cover 13 Control cable between User Interface and Patient Unit 14 Service connector for PC 15 On Off switch and switch cover version discontinued in production Q2 2007 16 On Off switch and switch cover version introduced in production Q2 2007 17 Locking arm tilting 18 Serial number label The serial number stated on this label is the ID number of the User Interface This serial number must always be refered to when ordering service spare parts etc for the User Interface For further information regard
53. d 4 5 Replacement of PC 1777 Type 1 New spare part kit assembling information added 4 6 Backlight Inverter Backlight Inverter Type 2 information added 4 7 4 8 TFT Display TFT Display Type 2 information added 4 9 Backlight lamps Backlight lamps Type 2 information added 4 14 Battery modules Slot number information corrected 4 19 Expiratory cassette membrane Changed spare part metal washer assembling information changed 4 20 Control cable Connect disconnect information corrected 5 2 Battery modules Battery module service procedure changed 5 4 Using the Menu and Biomed key Minor changes due to System version 3 0 5 4 Biomed Information corrected 5 5 Edit configuration Minor changes in Alarm sound level Alarm limits and NIV alarms Startup configuration information added 5 5 Change access code Change access code information added 5 6 Software installation Software information changed Software delivery information changed 5 6 Field Service System Information corrected 6 2 General System version reference changed 6 3 Pre use check Patient circuit test information added 6 8 Safety valve test PC 1772 replacement information corrected 6 9 Flow transducer test Information about water in the cassette corrected 6 9 Battery switch test Information that the test will not be performed if less than 10 minutes backup time remains added 6 10 Separate Patient circuit
54. d All other Biomed submenus are available only during Standby and requires an access code The default code is 1973 but the code can be changed in the Biomed menu Service Available only in Standby mode Event Log Displays Event logs Useful during troubleshooting Service Log Displays Service logs Useful during troubleshooting Report PM This button must be pressed when a Preventive Maintenance has been performed This will reset the timer that indicates operating hours until next Preventive Maintenance Default value is 5 000 hours In the Report PM submenu it is possible to enter a new value e g if the time stamp was erased during a SW installation SERVO s Ventilator System Service procedures Revision 02 Service Manual 5 5 5 Replaced Exp membrane This button must be pressed when the Expiratory cassette membrane has been replaced This will reset the operating capacity meter breath counter in the expiratory cassette Edit configuration Available only in Standby mode Alarm sound level Default alarm sound level can be changed in this window Alarm limits Default invasive alarm limits can be changed in this window Pressure Upper alarm limit Minute Volume Lower and Upper alarm limit Respiratory Rate Lower and Upper alarm limit End Exp Pressure Lower and Upper alarm limit Apnea time Upper alarm limit Default configuration reg
55. d pressure thus giving a linear measurement in the range 40 cm H2O to 160 cm H2O Technical limitation Pressure exceeding 400 cm H2O must be avoided Includes an ID PROM The ID information can be read by the SERVO s PC 1781 Expiratory pressure transducer Function identical to PC 1781 Inspiratory Pressure Transducer PC 1771 Control Functional Main Blocks diagram marking C The main block Control comprises microprocessor control of Breathing pattern for all different ventilation modes Electronics including microprocessor P control to achieve 1 Regulation of Inspiratory flow which is used during inspiration time in Volume Control VC mode 2 Regulation of Inspiratory pressure which can be used during inspiration time in any mode 3 Regulation of a constant Inspiratory flow which is used during expiration time in all modes 4 Respiratory timing pattern including frequency as well as distribution of the duration for Inspiration time Pause time and Expiration time according to front panel settings 5 Regulation of Inspiratory flow during inspiration time The desired total Inspiratory flow value according to front panel settings is used to generate the flow reference signals Insp Flow Ref 1 and Insp Flow Ref 2 The level relation between these two flow reference signals depends on the desired O2 concentration according to front panel setting Insp Flow Ref 1 and Insp Flow Ref 2 are used for th
56. e SERVO s Ventilator System User s manual The expiratory cassette can be interchanged between different SERVO s systems A Pre use check is always required after exchanging the expiratory cassette A re designed version of the Expiratory cassette was introduced during Q1 2005 starting with cassette S N 35000 The new cassette has a larger pressure transducer channel and this will significantly reduce the drying time needed before use Expiratory inlet 22 mm 10 mm tube connector for the expiratory tube of the patient breathing system The inlet is designed to make condensed water drip out and allow use of a water trap for such water to be collected Expiratory inlet bacteria filter can be connected to protect the cassette from contamination ServoS 9019 Expiratory pressure tube connector Bacteria filter Heating foil PC 1786 Expiratory channel cassette Ultrasonic transducer Ultrasonic transducer Inlet Outlet 3 Revision 02 Service Manual 3 7 SERVO s Ventilator System Description of functions Heating foil An electrical Heating Foil applied on the outside of the expiratory pipe where the Ultrasonic Flowmeter is situated The purpose of the Heating Foil to reduce condensation and maintain a stable temperature in the expiratory gas Ultrasonic flowmeter The Ultrasonic Flowmeter is a measuring device for the expiratory gas flow using ultrasound technique with two ultrasonic transducers recei
57. e control of its respective Gas Module Air and O2 Regulation of a constant Inspiratory flow during expiration time The desired constant Inspiratory flow value is the default Bias flow value see User s manual This desired constant Inspiratory flow value is used to generate the flow reference signals Insp Flow Ref 1 and Insp Flow Ref 2 with the same relation and same handling as described above under Regulation of Inspiratory flow except this occurs during expiration time Includes an ID PROM The ID information can be read by the SERVO s Note The System SW must be re installed if PC 1771 is replaced A lithium battery on PC 1771 power supplies the internal memory on the PC board If the battery on PC 1771 is disconnected or if the battery voltage is too low user default configurations made via the Field Service System FSS and Pre use check results including transducer calibrations will be erased The lithium batteries must be replaced after 5 years 3 Revision 02 Service Manual 3 9 SERVO s Ventilator System Description of functions PC 1772 Monitoring Functional Main Blocks diagram marking M The main block Monitoring comprises microprocessor P calculation of parameters and monitoring of alarm limits with control of alarms as well as back up alarm The main block Monitoring co operates with the Loudspeaker in the User Interface The PC 1772 Monitoring handles all supervision and alarm
58. e foil Note The membrane foil 1 can only be replaced on User Interface of Type 1 To replace the membrane foil Separate the front panel section from the rear cover Refer to section User Interface Disconnect the membrane foil connector 2 from PC 1777 Remove the four Direct access knobs Pull off the old membrane foil Remove all remainings from the old membrane foil on the User Interface front panel Clean the area for the membrane foil with ethanol or isopropanol Carefully separate the old membrane foil and remove the label strip 3 The label strip must be used on the new membrane foil Note The label strip is not included in the membrane foil spare part ServoS 9125 ServoS 9126 ServoS 9127 ServoS 9128 ServoS 9129 ServoS 9130 ServoS 9131 4 Revision 02 Service Manual 4 13 SERVO s Ventilator System Disassembling and assembling When assembling the membrane foils adhesive parts align the parts with great care Once installed the process cannot be reversed On the new membrane foil Carefully remove the protective foil 4 Attach the front panel film 5 onto the membrane button panel Press the front panel film firmly against the membrane button panel to ensure proper adhesion Remove the two remaining protective foils 6 Place the label strip 3 in correct position Press the front panel film firmly against the m
59. e of the SERVO s Make sure to prepare the SERVO s properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted in a log book After any installation maintenance or service intervention in the SERVO s perform a Pre use check Refer to the SERVO s Ventilator System User s Manual for details This product contains electronic and electrical components Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards 2 2 2 Service Manual Revision 02 Introduction SERVO s Ventilator System Main units The SERVO s is configured for adults and pediatrics with a number of ventilation modes suitable for these patient categories The SERVO s can be divided into the following main units User Interface The User Interface contains all controls used to set the ventilation and monitoring parameters Ventilation parameters as well as other important information are shown on the User Interface display Patient Unit The Patient Unit contains pneumatics and electronics for gas supply to the patient Power supply and battery back up is also contained in the Patient Unit The Control cable connects the User Interface and the Patient Unit ServoS 9000 Patient Unit User Interface Control cable 2 Revision 02 Service Manual 2 3 SERVO s Ventilator System In
60. e removed with PC 1860 mounted Remove the inspiratory channel including filter for the inspiratory pressure transducer Remove the screws 1 Carefully lift the mounting plate 2 and disconnect the O2 Sensor cell connector and the safety valve pull magnet connector from PC 1861 Lift off the mounting plate 2 The safety valve pull magnet is mounted on this plate Pull out the gas modules to disconnect them from PC 1861 Remove the threaded studs 3 Lift off PC 1861 4 Note When assembling the mounting plate 2 must be adjusted to correspond with the inspiratory channel latches ServoS 9063 ServoS 9064 4 4 20 Service Manual Revision 02 Disassembling and assembling SERVO s Ventilator System Remove the screws 3 Lift off the expiratory valve coil 4 ServoS 9070 PC 1785 Expiratory channel connector To remove PC 1785 Remove the side cover Disconnect the PC 1785 cable connector 1 Remove the screws 2 Pull down and lift off PC 1785 3 Note When assembling make sure that the rubber seal 4 is correctly seated around PC 1785 Expiratory valve coil To remove the expiratory valve coil Remove the side cover Disconnect pressure transducer tubes and cable connectors from PC 1784 Refer to section PC 1784 Expiratory channel Remove the screws 1 Lift off the cassette compartment 2
61. e signal Power_Good H and at the same time keep the internal voltages 5 V and 3 3 V for at least 1 ms in order to let the different subsystems save their current settings in non volatile memory Power down can be caused by Turning the On Off switch Off Mains failure resulting in a switch to battery but the backup battery voltage is too low for proper operation of the system The system is powered from a battery but the battery voltage becomes too low for proper operation of the system In this Off mode only charging of Battery modules is enabled if the system is connected to mains All other circuitry is un powered In Standby all circuitry is powered from the Power supply but no breathing will be active The operator can set all parameters including breathing mode during Standby 3 3 10 Service Manual Revision 02 Description of functions SERVO s Ventilator System If the internal DC supply voltage 12 V_Unreg drops below 10 V due to power supply failure the power supply source will automatically switch The following power supply source priority is used 1 Mains power 2 External 12 V DC supply if connected 3 Backup Battery modules Power supply selection is managed by PC 1862 Between Mains power and External 12 V DC supply PC 1863 Between Mains power External 12 V DC and Battery module power supply Mains inlet Inlet for mains power supply includ
62. eate leakage in the cassette It is very important for the function of the expiratory valve that the valve membrane is removed and mounted correctly as described below ServoS 9071 ServoS 9107 ServoS 9072 4 4 22 Service Manual Revision 02 Disassembling and assembling SERVO s Ventilator System Control cable The control cable connectors must be connected carefully to avoid damages on the connector pins Carefully find the correct position the connector pins and the guides in the connectors must correspond Do not turn the connector while inserting When correct position is found insert the connector Secure the connector with its locking ring The illustration shows the Patient Unit connector but the procedure for the User Interface connector is the same Note The Control cable must only be connected or disconnected when the ventilator is switched Off ServoS 9075 Carefully release and remove the pliers Check that the membrane is not deformed by the retaining ring If necessary remove the membrane and redo the complete mounting procedure Mount the expiratory cassette onto the Patient Unit Reset the operating capacity meter after replacement of the membrane To access the reset button select Menu Biomed Service Squeeze the retaining ring pliers and carefully press the membrane in place into the cassette as shown in the illustration Place the me
63. ed 51 75 relative charge 4 boxes filled 76 100 relative charge Recharge time for a discharged battery is approx 3 hours battery If a battery is fully discharged e g due to long storage time it may require up to 12 hours charging time With the charge status indicator on the User Interface the four green LEDs on the Battery module are no longer required and will be removed from the modules Remaining operating time in minutes for each battery Furthermore an activity instruction displayed directly next to the operating time may show Expires soon Message activated if expiry date will be reached within 60 days Replace battery The battery must be replaced and discarded Message activated if The batteries expiry date is passed and its life span is exceeded Note Due to the age of the battery the calculated backup time may in this case not be reliable Even if the battery indicates a significant backup time the battery must be replaced or The batteries operational capacity is too poor for continued usage caused e g by the chemical process in an aging battery The life span for the Battery module is calculated to two and a half year from manufacturing date Normal time for logistics and storage are included in this calculation The calculation corresponds thus to an estimated operational time of two years Manufacturing date year week is printed on the battery label ServoS 9101
64. ed keys label strip 2 Check its position through the button windows of the front panel film Adjust if necessary Align the label strip with great care Once installed the process cannot be reversed ServoS 9029 ServoS 9030 ServoS 9028 ServoS 9040 4 Revision 02 Service Manual 4 11 SERVO s Ventilator System Disassembling and assembling While holding the label strip in correct position remove the protective foils 3 and 4 Press the label strip against the adhesive area Remove the protective foil 5 Press the front panel film 6 firmly against the front panel to ensure proper adhesion Special functions keys label Insert the Special functions keys label strip 7 Check its position through the button windows of the front panel film Adjust if necessary Align the label strip with great care Once installed the process cannot be reversed While holding the label strip in correct position remove the protective foils 8 and 9 Press the label strip against the adhesive area Remove the protective foil 10 Press the front panel film 11 firmly against the front panel to ensure proper adhesion ServoS 9036 ServoS 9037 ServoS 9038 ServoS 9039 ServoS 9035 ServoS 9033 ServoS 9034 ServoS 9031 ServoS 9032 4 4 12 Service Manual Revision 02 Disassembling and assembling SERVO s Ventilator System Membran
65. embrane button panel to ensure proper adhesion Remove the protective foils 7 and 8 Mount the membrane foil 1 onto the User Interface front panel Press the membrane foil firmly against the front panel to ensure proper adhesion Restore the User Inteface Mount the four Direct access knobs Connect the membrane foil connector to PC 1777 ServoS 9132 ServoS 9133 ServoS 9134 ServoS 9135 ServoS 9127 ServoS 9136 4 4 14 Service Manual Revision 02 Disassembling and assembling SERVO s Ventilator System Patient Unit Main and side covers The main cover and the side cover are secured with screws Main cover screw 1 Side cover bayonet screws 2 To release or lock these screws turn the screw 90 as shown in the illustration To open the Patient Unit main cover Release the main cover screw 1 Pull the main cover 3 to stop The main cover is now partly open and the inspiratory section is accessible To remove the Patient Unit main cover Open the main cover as described above Press the latch 4 and slide off the main cover 3 To remove the Patient Unit side cover Release the side cover screws 2 Pull off the side cover 5 ServoS 9043 ServoS 9044 ServoS 9046 With power supply connected to the SERVO s there are energized electrical components inside the unit All personnel must exercise ext
66. enance Check if there are any unexpected Technical alarms in the Service log available via the Biomed menu Technical alarms are available also via the Field Service System FSS Set the On Off switch on the User Interface to Off Disconnect the mains power cable Disconnect the gas supplies wall and or cylinder Remove patient tubing If fitted remove bacteria filter from the expiratory inlet Equipment Standard service tools Barometer or information about the actual barometric pressure Access to the Field Service System FSS Recommended but not required Preventive maintenance kit containing all parts needed during the maintenance 7 Revision 02 Service Manual 7 3 SERVO s Ventilator System Preventive maintenance Preventive maintenance Maintenance kit 5 000 hours Only original parts from the manufacturer must be used Spare parts and maintenance kits can be ordered from your local MAQUET representative When performing this maintenance a Maintenance kit 5 000 hours should be used The following parts shall be replaced and they are included in the Maintenance kit 5 000 hours A Filters for the gas modules B Nozzle units for the gas modules C Bacteria filter for the inspiratory pressure transducer D Bacteria filter for the O2 cell Performing the Preventive maintenance Disassembling and assembling of the unit is
67. expiratory cassette 19 is a complete unit It contains the following parts Expiratory inlet with moisture trap PC 1786 Expiratory channel cassette Ultrasonic flowmeter Heating foil to keep a stable temperature in the expiratory gas Pressure transducer connection incl bacteria filter to connect the expiratory pressure transducer Expiratory valve incl valve membrane Expiratory one way valve The expiratory valve coil mounted under the expiratory cassette compartment controls the valve membrane in the cassette PC 1786 Expiratory channel cassette inside the expiratory cassette is electrically connected to PC 1784 Expiratory channel via PC 1785 Expiratory channel connector 17 When the Patient Unit side cover is removed the following parts are accessible 16 PC 1784 Expiratory channel with the two connected PC 1781 Inspiratory and Expiratory Pressure Transducers 17 PC 1785 Expiratory channel connector 18 Expiratory valve coil ServoS 9015 ServoS 9016 ServoS 9014 2 Revision 02 Service Manual 2 9 SERVO s Ventilator System Introduction SERVO s software structure General The SERVO s software installed in the ventilator will contain all available system functionality The soft ware is separated into different subsystems and stored on some of the PC boards The separation of the software is handled by the installation program The SERVO s softw
68. f the Patient Unit The serial number is also stored in the SW memory as the System ID This serial number must always be refered to when ordering service spare parts software updates upgrades etc 2 Revision 02 Service Manual 2 7 SERVO s Ventilator System Introduction When the Patient Unit main cover is opened the following parts are accessible 1 The inner part of the two gas modules including their nozzle units 2 Connector muff 3 Inspiratory pressure transducer tube incl bacteria filter to connect the inspiratory pressure transducer 4 Inspiratory pipe with housings for the O2 Sensor cell and for the safety valve 5 O2 cell incl bacteria filter 6 O2 Sensor Alternative to the O2 cell for oxygen concentration measurement 7 PC 1861 Pneumatic back plane covered by the metal plate The gas modules the O2 Sensor cell and the safety valve pull magnet are connected to PC 1861 When the Patient Unit main cover is removed the following parts are accessible 8 AC DC Converter 9 PC 1772 Monitoring 10 PC 1771 Control 11 PC 1863 Power control 12 PC 1862 DC DC amp Standard connectors 13 PC 1860 Main back plane The PC boards listed above are connected to PC 1860 Main back plane 14 Battery modules 15 Internal fan ServoS 9013 ServoS 9012 ServoS 9108 2 2 8 Service Manual Revision 02 Introduction SERVO s Ventilator System The
69. fan housing indicates the air flow direction When mounting the fan make sure that the cooling air flow is directed into the unit Inspiratory channel Removal of the inspiratory channel as well as removal of O2 Sensor and O2 cell filter is described in the User s manual ServoS 9055 ServoS 9056 Safety valve membrane To remove the safety valve membrane Remove the inspiratory channel Release the latches 1 one on each side of the safety valve housing and lift off the membrane holder 2 The membrane 3 and the valve seat 4 are now accessible e g for inspection and cleaning ServoS 9090 ServoS 9091 4 Revision 02 Service Manual 4 19 SERVO s Ventilator System Disassembling and assembling PC 1784 Expiratory channel To remove PC 1784 Remove the side cover Disconnect the Inspiratory pressure transducer tube 1 PC 1785 cable connector 2 Expiratory pressure transducer tube 3 Expiratory valve coil cable connector 4 Release PC 1784 from the standoffs 5 Carefully pull out and lift off PC 1784 6 Note When replacing PC 1784 Expiratory channel it can be necessary to re install the System SW For further information refer to section Replacing PC boards in this chapter ServoS 9065 PC 1861 Pneumatic back plane To remove PC 1861 Remove the main cover Remove PC 1860 Main back plane PC 1861 cannot b
70. g adhesives Electrolube Bloc Lube BLV15ML on threads in contact with PC boards Loctite 243 on all other threads 4 Revision 02 Service Manual 4 3 SERVO s Ventilator System Disassembling and assembling User Interface There are two different versions of the User Interface In this manual they are described as Type 1 Up to User Interface S N 201200 SERVO s S N 02000 Type 2 User Interface S N 201201 SERVO s S N 02001 and higher The electronics inside the User Interface differs and as a consequence some of the spare parts are not compatible between the two versions Further information can be found below and also in the SERVO s Spare Parts List The User Interface in the adjacent illustration is equipped with the On Off switch cover introduced Q2 2007 Refer to section PC 1777 Panel for further information To separate the front panel section from the rear cover Disconnect the control cable 1 Remove the screws 2 Threadlocking adhesive is not used on these screws Lift off the rear cover from the front panel section All parts inside the front panel section are now accessible When removing the rear cover The PC Card eject button can catch on the PC Card slot during disassembling Carefully release the button from the rear cover before removing the cover When mounting the rear cover on units with the new version of the On Off switch and sw
71. heck the fault was located to the cassette The fail with the old cassette may in this case be due to water collected inside the cassette Dry the old cassette properly 3 Replace the gas modules Replace one gas module at a time 4 Replace PC 1785 Expiratory channel connector 5 Replace PC 1771 Control 6 Replace PC 1772 Monitoring 7 Replace PC 1784 Expiratory channel Battery switch test Checks that the power supply switches to battery when mains power is disconnected Checks that the power supply switches back to mains power when re connected This test will not be performed if Less than 10 min backup time remains in the internal battery MON 1 Check that the total remaining time for the internal battery is gt 10 min If not allow the internal battery to charge and repeat the test 2 Replace PC1863 Power control 3 Replace the battery modules Always replace both battery modules at the same time Troubleshooting SERVO s Ventilator System 6 10 Service Manual Revision 02 6 Test Test description Recommended action if the test fails Patient circuit test Checks the patient circuit leakage with patient tubing connected using the inspiratory and expiratory pressure transducers Checks that the leakage at 50 cm H2O is max 80 ml min Will allow the system to calculate a compensation for circuit compliance if the leakage requirements are met BRE If
72. herwise the assembling procedure is the reverse of the described disassembling procedure The illustrations in the SERVO s Spare Parts List are very useful as a guide when disassembling and assembling the SERVO s Preparations Before disassembling or assembling the SERVO s Set the On Off switch on the User Interface to Off Disconnect the mains power cable Disconnect the gas supplies wall and or cylinder Make sure that all gas conveying parts are cleaned according to instructions in the SERVO s Ventilator System User s Manual After any service intervention in the SERVO s perform a Pre use check according to instructions in the SERVO s Ventilator System User s Manual Handling PC boards The PC boards contain components that are highly sensitive to static electricity Those who come into contact with circuit boards containing sensitive components must take certain pre cautions to avoid damaging the components ESD protection When working with ESD sensitive components always use a grounded wrist band and grounded work surface Adequate service tools must also be used PC boards spare parts must always be kept in protective packaging for sensitive electronic device PC boards must not be inserted or removed while the mains power or battery power is applied to the PC boards Remove and insert the PC boards very carefully to avoid damage to the connectors Replacing
73. ing PC Card eject button corrected On Off switch position during assembling information added 4 4 PC 1777 Panel On Off switch and switch cover information added 4 8 TFT Display Type 2 New TFT Display cable and cable locking device on Type 2 information added 4 12 4 13 Membrane foil New spare part assembling information added 5 4 Using the Menu and Biomed key Minor changes due to System version 3 1 5 4 Biomed Report PM functionality changed 5 5 Startup configuration Corrected System Version 3 required 5 5 O2 cell adaption Corrected 6 2 General System version reference changed 6 8 O2 cell sensor test O2 Sensor and gas mixture information added 6 12 Error code 12 Recommended actions corrected 7 2 General Text regarding regular cleaning and extended cleaning corrected adapted to the User s Manual 7 2 Preparations Text regarding check of Technical alarms added 7 4 Bacteria filter for O2 cell O2 Sensor information added 9 1 9 5 Service Manual revision history New chapter added 10 1 Diagrams Chapter number changed from 9 to 10 10 3 Functional Main Blocks diagram O2 Sensor information added Battery module information corrected PC 1786 Exp channel cassette corrected temperature sensor shown in the diagram 9 9 6 Service Manual Revision 02 Service Manual revision history SERVO s Ventilator System Notes 10 Revision 02 Service Manual 10 1
74. ing grounding connection The SERVO s System will automatically adjust to the connected mains power if the mains power is within specified range No voltage or frequence setting is required The mains inlet is equipped with two mains power fuses F11 and F12 rated 2 5 A AC DC Converter Converts the connected AC Power to the internal DC supply voltage 12 V_Unreg PC 1862 DC DC amp Standard connectors Converts the internal DC supply voltage 12 V_Unreg into the following internal DC supply voltages 24 V 12 V 12 V 5 V 3 3 V All standard connectors are located on this board The connectors are the following N26 External 12 V DC supply input The connector is equipped with a fuse F1 rated 10 A There are no alarms indicating power supply failure related to the External 12 V DC supply Thus when the External 12 V DC supply is used backup Battery modules must be installed to ensure proper operation N28 Control cable N29 RS232 P63 Alarm output connector Refer to section Optional equipment Pin configuration and signal names can be found in chapter Diagrams Includes an ID PROM The ID information can be read by the SERVO s PC 1863 Power control Connects and controls charging of the Battery modules A Temperature Sensor is integrated on PC 1863 This sensor measures the temperature inside the Patient Unit The output signal co
75. ing operation of the User Interface refer to the User s manual 2 Revision 02 Service Manual 2 5 SERVO s Ventilator System Introduction When the front panel section is removed from the rear cover the following parts are accessible 1 Touch screen incl frame 2 TFT Display 3 Backlight lamp 4 PC board Backlight inverter 5 PC 1777 Panel including PC Card slot 6 Loudspeaker 7 Main rotary dial rotary encoder with switch 8 Direct access controls rotary encoder The illustration above shows User Interface of Type 2 ServoS 9004 ServoS 9003 2 2 6 Service Manual Revision 02 Introduction SERVO s Ventilator System Patient Unit Items accessible from the outside of the Patient Unit are shown in the illustration above All labels attached to the rear side of the Patient Unit are described in the User s Manual 1 Expiratory outlet 2 Gas module for Air 3 Gas module for O2 4 Internal fan with filter 5 Control cable connector 6 Serial port for data communication RS 232 7 Alarm output connector optional ServoS 9005 8 Connector for external 12V DC power supply 9 Fuse F1 for external 12V DC power supply 10 Mains supply connector incl fuses F11 and F12 11 Equipotentiality terminal 12 Inspiratory outlet 13 Expiratory inlet 14 Serial number label The serial number stated on this label is the ID number o
76. ing the Preventive maintenance The filter housing and the filter cover are provided with matching guide pins These guide pins prevent mounting of the filter cover with gas inlet nipple on the wrong module A non return valve for the gas inlet is located in the filter cover This valve will suppress short pressure drops in the gas supply The non return valve is also designed to slowly evacuate compressed gas from the module if the gas supply to the module is disconnected Inspiratory valve temperature sensor The temperature of the supplied gas is measured by the Inspiratory Valve Temperature Sensor This sensor is situated in the gas flow The output signal from this sensor is used to compensate for the gas density variations due to temperature Supply pressure transducer The pressure of the supplied gas is measured by the Supply Pressure Transducer The output signal from this transducer is amplified It is then used to calculate the absolute pressure of the gas to compensate for gas density variations due to pressure Flow transducer The gas flows through a net resistance which causes a pressure drop The pressure is measured on both sides of this net and the differential pressure value is then amplified Nozzle unit The plastic Nozzle Unit contains a valve diaphragm The valve diaphragm controlled by the Inspiratory Solenoid regulates the gas flow through the Gas Module The complete plastic nozzle u
77. ion to set value Display Event logs Possible selections Latest logs Selected time interval Display Service logs Possible selections 21 latest logs Selected time interval Alarm limits Alarm sound level Edit configuration Report PM Replaced Exp membrane Service log Event log Service Biomed Alarms Ventilator settings Apnea periods Functions Technical alarms Test results Preventive Maintenance Service report history Latest Time selection Installation log Latest Time selection NIV alarms Startup configuration Change access code to Biomed menu Change access code ServoS 9092 Using the Menu and Biomed key The Menu and Biomed functions are useful tools during service The adjacent flowchart shows the Biomed functions in System version V3 1 A complete set of flowcharts showing all Keys and Screen touch pad functions can be found in the SERVO s Ventilator System User s Manual Menu Pressing the fixed key Menu will open the Menu window on the User Interface The Menu is active in Standby and during ventilation mode but the available submenus differs Possible selections in the Menu window are Alarm Review Complience compensation Biomed Panel lock Biomed Submenu O2 cell adaptation active only during ventilation modes in units with O2 cell No access code is require
78. is executed by the microprocessor on PC 1777 System ID The System ID SW is a configuration file stored on PC 1860 Main Back Plane that is unique for each ventilator The System ID SW will enable the functions selected for this ventilator To change the functions of the ventilator a new System ID SW can be installed via an Option Upgrade When replacing PC 1860 Main Back Plane a spare part that is factory programmed for the concerned ventilator must be used AC DC CONVERTER PC 1772 PC 1862 PC 1771 PC 1863 PC 1777 PC 1861 EXP EXP INLET INLET EXP INLET INSP OUTLET PC 1781 PC 1784 BATTERY BATTERY PC 1781 PC 1785 PANEL SW BREATHING SW ServoS 9017 PC 1860 BREATHING SW MONITORING SW SYSTEM ID SW 2 2 10 Service Manual Revision 02 Introduction SERVO s Ventilator System Notes 3 Revision 02 Service Manual 3 1 SERVO s Ventilator System Description of functions 3 Description of functions About this chapter 3 2 Memory types used in the SERVO s 3 2 User Interface 3 2 User Interface controls 3 2 PC 1777 Panel 3 2 Loudspeaker 3 2 Backlight Inverter
79. it optional By installing the accessory Loudspeaker booster kit the alarm sound is amplified in a mechanical way The sound level will be increased significantly This increased sound level will raise the complete alarm sound setting range 20 100 i e also the lower sound level range will be increased The Loudspeaker booster consists of a rubber collar that is mounted onto the loudspeaker to direct the sound towards the loudspeaker grid All parts required for the installation are included in the Loudspeaker booster kit Isolation shield with drip guard optional The optional Isolation shield with drip guard is connected to the Expiratory cassette outlet The accessory will not affect the expiratory resistance of the system The main purpose of this accessory is to protect the expiratory outlet pipe from direct cooling draught favoring condensation The drip guard will also collect water that may be condensed during ventilation in connection with use of dual heated patient tube during active humidification The water collector has a maximum volume of 100 ml 4 Revision 02 Service Manual 4 1 SERVO s Ventilator System Disassembling and assembling 4 Disassembling and assembling General 4 2 Preparations 4 2 Handling PC boards 4 2 Re
80. itch cover The switch must be set to On before mounting the rear cover If set to Off the switch lever will not enter the hole in the switch cover The main parts of the User Interface are Rear cover 3 PC 1777 Panel 4 Backlight Inverter 5 Support plate 6 TFT Display 7 including Backlight lamps Touch screen incl frame 8 ServoS 9089 ServoS 9021 With power supply connected to the SERVO s there are energized electrical components inside the unit e g the backlight lamps that are supplied with 660 V by the Backlight Inverter All personnel must exercise extreme caution if fault tracing or adjustments are performed with power supply connected and with the user interface rear cover removed 4 4 4 Service Manual Revision 02 Disassembling and assembling SERVO s Ventilator System PC 1777 Panel PC 1777A D Type 1 PC 1777F or higher Type 2 To remove PC 1777 Panel 1 Carefully disconnect all cable connectors from PC 1777 Remove the screws 2 holding PC 1777 Lift off PC 1777 Note When replacing PC 1777 Panel it can be necessary to re install the System SW For further information refer to section Replacing PC boards in this chapter For PC 1777 of Type 2 System SW version V2 00 04 or higher is required On Off switch and switch cover Old design On Off switch and switch cover New design ServoS 9110 Servo
81. l 8 3 SERVO s Ventilator System Index N N26 connector 9 2 N28 connector 9 2 N29 connector 9 2 N70 connector 9 2 Non volatile memory 3 2 O O2 cell 2 7 3 5 O2 cell adaption 5 5 O2 Sensor 2 7 3 5 On Off switch 2 4 3 2 4 3 4 4 On Off switch cover 2 4 3 2 4 3 4 4 Optional equipment 2 3 P P63 connector 10 2 Panel SW 2 9 Patient Unit 2 2 2 6 3 3 4 14 4 15 PC 1771 Control 2 7 3 8 4 2 4 16 5 3 PC 1772 Monitoring 2 7 3 9 4 2 4 16 5 3 PC 1777 Panel 2 5 3 2 4 2 4 3 4 4 PC 1781 Expiratory pressure transducer 2 8 3 8 PC 1781 Inspiratory pressure transducer 2 8 3 8 PC 1784 Expiratory channel 2 8 3 9 4 2 4 19 PC 1785 Expiratory channel connector 2 8 3 8 4 20 PC 1860 Main back plane 2 7 3 8 4 17 PC 1861 Pneumatic back plane 2 7 3 6 4 19 PC 1862 DC DC amp Standard con 2 7 3 10 4 17 PC 1863 Power control 2 7 3 10 4 17 PC board Backlight inverter 2 5 3 3 4 3 4 6 PC card 4 2 PC card slot 2 4 Power supply 3 9 Pressure transducers 3 8 Pre use check 6 3 Preventive maintenance 7 3 R RAM 3 2 Rear cover 4 3 Replacing PC boards 4 2 RS232 2 6 10 2 S Safety inspection 7 6 Safety valve 2 7 3 6 4 18 Safety valve membrane 4 18 Serial number label 1 4 2 4 2 6 Serial port 2 6 Service card 5 6 Service connector 2 4 Service contract 1 4 Set date and clock 5 5 Shelf base 2 3 Side cover 4 14 Software information 5 6 Software installation 5 6 Software structure 2 9 Spare parts infor
82. late 3 To remove the TFT Display Carefully disconnect all cables from PC 1777 The Backlight Inverter cable and the Loudspeaker cable can remain connected Carefully disconnect the Backlight lamp cable from PC board Backlight Inverter Remove the screws 4 holding the support plate Lift off the support plate assembly including TFT Display and PC boards DIP switch on PC 1777 Type 2 Faulty DIP switch 5 setting will result in a reversed display image Settings for TFT Display SHARP LQ12S41 SHARP LQ121S1DG11 NEC NL8060BC31 27 ServoS 9024 ServoS 9094 4 4 8 Service Manual Revision 02 Disassembling and assembling SERVO s Ventilator System Type 1 Carefully release the Type 1 cable 7 from PC 1777 as shown in the illustration Remove the screws 6 holding the TFT Display to the support plate ServoS 9025 Type 2 On units produced prior to Q2 2007 the Type 2 cable is secured with a self adhesive cushion mounted on the cable connector at the TFT Display There is also a similar cushion on the cables EMC filter To disconnect carefully release the Type 2 cable 8 from PC 1777 as shown in the illustration ServoS 9026 ServoS 9106 A new locking device for the Type 2 cable was introduced Q2 2007 This device replaces the cushion mounted on the cable connector at the TFT Display The cushion on the EMC filter remains Slide the l
83. mation 1 4 Special function keys 2 4 4 12 Special waste 1 4 Standard connectors 10 2 Standby indicator 2 4 Start Stop Standby ventilation key 2 4 Support Arm 176 177 2 3 Support plate 4 3 SW Update 5 6 SW Upgrade 5 6 Symbols used in this manual 1 4 System ID 2 9 4 17 System SW 3 2 4 2 5 6 System version 1 4 T Technical error codes 6 11 Technical training 1 4 Temperature sensor 3 9 3 10 TFT Display 2 5 3 3 4 7 Threadlocking adhesives 4 2 Tightening torque 4 2 Touch screen incl frame 2 5 3 3 4 3 4 10 U Ultrasonic flowmeter 2 8 3 7 User Interface 2 2 2 4 3 2 4 3 7 6 User Interface controls 3 2 User interface panel cover 2 3 User s Manual 1 4 W Waterbag pole 2 3 8 8 4 Service Manual Revision 02 Index SERVO s Ventilator System Notes 9 Revision 02 Service Manual 9 1 SERVO s Ventilator System Service Manual revision history 9 Service Manual revision history Revision 01 9 2 Revision 02 9 4 Only personnel trained and authorized by MAQUET shall be permitted to perform installation service or maintenance of the SERVO s Make sure to prepare the SERVO s properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted in a log book After any installation maintenance or servi
84. mbrane onto the cassette as shown in the illustration ServoS 9071 ServoS 9074 ServoS 9073 SERVO s Ventilator System Service procedures Revision 02 Service Manual 5 1 5 5 Service procedures Battery modules 5 2 Replacing the lithium batteries on PC 1771 and PC 1772 5 3 Using the Menu and Biomed key 5 4 Menu 5 4 Biomed 5 4 Software installation 5 6 General 5 6 Software information 5 6 Software delivery 5 6 Software installation procedure 5 6 Field Service System 5 6 General 5 6 Field Service System functions 5 6 Only personnel trained and authorized by MAQUET shall be permitted to perform installation service or maintenance of the SERVO s Make sure to prepare the SERVO s properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must
85. n maintenance or service intervention in the SERVO s perform a Pre use check Refer to the SERVO s Ventilator System User s Manual for details This product contains electronic and electrical components Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards 3 3 2 Service Manual Revision 02 Description of functions SERVO s Ventilator System About this chapter This text refers to the Functional Main Blocks diagram in chapter Diagrams Memory types used in the SERVO s There are four different types of memories used in the SERVO s Flash memory For System SW storage Present on PC 1771 PC 1772 PC 1777 PC 1784 and in the O2 Sensor The System SW can be re installed updated using a SW Service Release RAM For temporary storage of software and data Present on PC 1771 PC 1772 and PC 1777 Non volatile memory RAM with battery backup For settings trends and logs Present on PC 1771 and PC 1772 EEPROM For PC board information configuration calibration data etc Present on almost all PC boards and in the O2 cell In the O2 Sensor an EEPROM is emulated by the Flash memory User Interface Functional Main Blocks diagram marking U There are two different versions of the User Interface In this manual they are described as Type 1 Up to User Interface S N 201200 SERVO s S N 02000 Type 2
86. nal regulations Responsibility for the safe functioning of the equipment reverts to the owner or user in all cases in which service or repair has been done by a non professional or by persons who are not employed by or authorized by MAQUET and when the equipment is used for other than its intended purpose 1 Symbols used in this manual ESD sensitive components When handling ESD sensitive devices established procedures must be observed to prevent damage Special waste This product contains electronic and electrical components Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards Recycling Worn out batteries must be recycled or disposed of properly in accordance with appropriate industrial and environmental standards With power supply connected to the SERVO s there are energized electrical components inside the unit Exercise extreme caution if power supply connected and covers are removed Technical training Refers to the Technical training supplied by MAQUET Service contract Refers to the Service contract supplied by MAQUET Revision 02 Service Manual 1 5 SERVO s Ventilator System Important 1 Important Hazard notices Before disassembling or assembling of the SERVO s make sure that the On Off switch is set to Off Mains power cable is disconnected Gas supply is disconnec
87. nit must be replaced during the Preventive maintenance After replacement allow the diaphragm to settle during approx 10 minutes before gas pressure is connected to the Gas Module Inspiratory solenoid The gas flow through the Gas Module is regulated by the Inspiratory Solenoid via the Nozzle Unit The current supplied to the solenoid is regulated so that the gas module will deliver a gas flow according to the settings on the User Interface Gas module key The Gas Modules are provided with a mechanical key to prevent that the module is mounted in the wrong slot The key consists of a plastic guide mounted under neath the module and a corresponding guide mounted in the patient unit ID PROM Each Gas Module is provided with an ID PROM The ID information can be read by the SERVO s Connector muff The Connector Muff connects the Gas Module outlets to the Inspiratory Pipe inlet Inspiratory pipe The Inspiratory Pipe leads the gas from the Connector Muff to the Inspiratory Outlet The Inspiratory Pipe comprises Housing for the O2 Sensor as well as housing and locking lever for the O2 cell with its bacteria filter Housing for the Safety Valve Connection for measurement of inspiratory pressure The pipe is provided with internal flanges with the purpose to improve mixing of O2 and Air The O2 Sensor requires a changed design of the Inspiratory pipe The O2 Sensor and the Inspiratory pipe are
88. nmental concern Components listed below shall be disposed of in accordance with appropriate industrial and environmental standards Printed circuit boards PC 1771 Control including a Lithium battery C PC 1772 Monitoring including Lithium battery M PC 1777 Panel including Backlight Inverter U PC 1781 Pressure transducer 2 each T PC 1784 Expiratory channel F PC 1785 Expiratory channel connector E PC 1786 Expiratory channel cassette E PC 1860 Main back plane PC 1861 Pneumatic back plane I PC 1862 DC DC amp Standard connectors P PC 1863 Power control P Other electronics TFT assembly including backlight U Touch screen glass U O2 cell containing caustic lime and lead Pb I O2 Sensor containing PC boards I Gas module Air containing multiple PC boards I Gas module O2 containing multiple PC boards I AC DC Converter containing PC boards P Expiratory cassette E Expiratory valve coil E Safety valve pull magnet I Battery modules Nickel Metal Hydride P Construction materials The construction materials used in SERVO s in of the total weight Metal total 72 5 Aluminium 70 Steel zink brass 2 5 Polymeric material total 8 PA Polyamide POM Polyoxymethylene SI Silicone TPE Thermoplastic elastomer
89. ntains electronic and electrical components Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards When working with ESD sensitive components always use a grounded wrist band and a grounded work surface Adequate service tools must always be used To the responsible service personnel The contents of this document are not binding If any significant difference is found between the product and this document please contact MAQUET for further information We reserve the right to modify products without amending this document or advising the user Only personnel trained and authorized by MAQUET shall be permitted to perform installation service or maintenance of the SERVO s Only MAQUET genuine spare parts must be used PC boards spare parts must always be kept in a package for sensitive electronic devices MAQUET will not otherwise assume responsibility for the materials used the work performed or any possible consequences of same The device complies to standards and require ments as stated in the SERVO s Ventilator System User s Manual 1 6 Service Manual Revision 02 Important SERVO s Ventilator System Environmental declaration Purpose This environmental declaration is for a SERVO s base unit Letters codes within brackets refers to the Functional Block Diagram in chapter Diagrams Components with special enviro
90. ntrolled by the Breathing subsystem The pressure inside the inspiratory pipe is above 117 7 cm H2O This is an extra safety function and this situation will normally not occur The safety valve will also be opened by some other alarms e g the Out of gas alarm During startup the pull magnet is electrically activated so that the pull magnet axis is pushed up with a clicking sound This is the normal operational position of the pull magnet the Safety Valve is normally kept closed The safety valve opening pressure is calibrated to 117 3 cm H2O during each Pre use check Inspiratory outlet 22 mm 15 mm tube connector for the inspiratory tube of the patient breathing system PC 1861 Pneumatic back plane Interconnecting board including connectors for the Gas Modules as well as cable connectors for the Safety Valve and the O2 Sensor cell Expiratory section Functional Main Blocks diagram marking E The main block Expiratory Section conveys the breathing gas from the patient breathing system to the Expiratory Outlet It comprises Measurement of expiratory flow Connection for measurement of expiratory pressure Controlling element for the regulation of expiratory pressure Expiratory cassette The expiratory gas conveying parts and PC 1786 Expiratory Channel Cassette are integrated into one part the Expiratory Cassette which can be easily removed for cleaning or exchange Se
91. ocking device 9 into position until it snaps in place Note that there is no cushion on the cable 10 The adjacent illustration also shows PC 1777 mounted onto the support plate and the Type 2 cable connected to PC 1777 The locking device 9 is visible between the support plate and PC 1777 ServoS 9109 4 Revision 02 Service Manual 4 9 SERVO s Ventilator System Disassembling and assembling Backlight lamps Using the Field Service System FSS a time meter for the lamps can be shown This time meter must be reset after replacement of the lamps Type 1 The Backlight lamp kit for TFT Display Type 1 includes two lamps Always replace both lamps at the same time To access the Backlight lamps Lift off the TFT Display Refer to section TFT Display Remove the screws 1 holding the lamp Lift off the lamp 2 Type 2 On TFT Display Type 2 only one Backlight lamp is required To access the Backlight lamp Lift off the TFT Display Refer to section TFT Display Release the snap in holder and pull out the lamp Lift off the lamp 3 ServoS 9097 ServoS 9027 Units with Replacement kit for PC 1777A D Carefully release the cable 11 from the recess on PC 1777 When assembling make sure that the Cushion 12 is attached to the EMC filter 13 EMC filter 13 is placed into the support plate recess Retainer 14 is mounted
92. onic and electrical components Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards 6 6 2 Service Manual Revision 02 Troubleshooting SERVO s Ventilator System Possible causes to malfunction not mentioned in the following troubleshooting guides are The system has not been correctly assembled after cleaning maintenance or service Disconnection or bad connection in cable connectors PC board connectors and inter connection boards Disconnected or defective gas tubes These possible causes to malfunction must always be considered during troubleshooting General Before starting troubleshooting try to eliminate all possibilities of operational errors If the malfunction remains use the troubleshooting guides below as well as the information in chapter Description of functions to locate the faulty part Perform actions step by step and check that the malfunction is eliminated When the fault is corrected carry out a complete Pre use check as described in the SERVO s Ventilator System User s Manual The troubleshooting guides below are focused only on technical problems Information about clinical related problems can be found in the SERVO s Ventilator System User s Manual For functionality enhancement the latest released System SW version is always recommended The Information in this chapter applies to System
93. ote This alarm will be activated if the ambient pressure is below 650 hPa e g on a high altitude 40 INVALID_METRIC N A 41 REAL_TIME_CLOCK_ERR 1 Replace PC 1772 Monitoring 42 PERSISTENT_CHECKSUM_ERR 1 Restart the unit 2 Replace PC 1772 Monitoring if not Error code 29 43 POWER_COMM_ERR 1 Replace the battery modules Always replace both battery modules at the same time 2 Replace PC 1863 Power control 3 Replace PC 1772 Monitoring 44 ALARM_LIM_XOR_ERR 1 Restart the unit 2 Replace PC 1772 Monitoring if not Error code 29 45 ABNORMAL_SHUTDOWN 1 Restart the unit and run a Pre use check 2 Replace PC 1772 Monitoring 46 REMOTE_ALARM_ERR 1 Replace PC 1862 DC DC amp Standard Connectors 2 Replace PC 1772 Monitoring 47 FIXED_BATTERY_MISSING 1 Check that the internal battery modules are properly connected 2 Replace the battery modules Always replace both battery modules at the same times 3 Replace PC 1863 Power control 4 Replace PC 1772 Monitoring 48 PRE_OXYGEN_PHASE_TOO_LONG 1 Replace PC 1771 Control 49 DISCONNECT_PHASE_TOO_LONG 1 Replace PC 1771 Control 50 BACKPLANE_EEPROM_INVALID 1 Replace PC 1772 Monitoring 2 Replace PC 1860 Main back plane SERVO s Ventilator System Troubleshooting Revision 02 Service Manual 6 15 6 Error code Error message Possible cause Recommended action Breathing 10001 BATTERY_MIN_VOLTAGE 1 Replace
94. placing PC boards 4 2 Assembling guidelines 4 2 Tightening torque 4 2 Threadlocking adhesives 4 2 User Interface 4 3 PC 1777 Panel 4 4 Backlight inverter 4 6 TFT Display 4 7 Backlight lamps 4 9 Touch screen including frame 4 10 Membrane foil 4 12 Patient Unit 4 14 Main and side covers 4 14 Remove the User Interface from the Patient Unit 4 15 Gas modules 4 15 Battery modules 4 16 PC 1771 Control and PC 1772 Monitoring 4 16 AC DC Converter 4 16 PC 1863 Power control 4 17 PC 1862 DC DC amp Standard connectors 4 17 PC 1860 Main back plane 4 17 Inte
95. ratory Valve Coil The valve is fully open as long as no power is supplied to the coil Operating capacity for the membrane is estimated to 10 000 000 breathing cycles When this limit is passed or if the membrane for some reason has become defective it must be replaced Refer to instructions in chapter Disassembling and assembling Remaining operating capacity in for the membrane can be shown in the Status window Select Status Exp cassette to check Remaining membrane capacity The operating capacity meter must be reset after replacement of the membrane Expiratory valve coil The movable axis of the Expiratory Valve Coil controls the opening of the Expiratory Valve by pushing the valve membrane into desired position The power supply to the coil is regulated so that the remaining pressure in the patient system towards the end of the expiration time is kept on the PEEP level according to front panel setting Expiratory outlet with expiratory one way valve The gas from the patient system leaves the ventilator via this Expiratory Outlet Backflow via the cassette is prevented by the Expiratory One Way Valve Its rubber membrane and valve seat are integrated parts of the Expiratory Outlet PC 1786 Expiratory channel cassette The PC 1786 Expiratory Channel Cassette is a connection board integrated into the Expiratory Cassette for the Ultrasonic Flowmeter and for the Heating Foil It connects to PC 1785 mounted in the
96. red on a PC Card Software installation procedure Further information regarding the different softwares and the software installation procedure can be found in the SERVO i SERVO s Software Installation Instructions SW Update SW Upgrade SW Option SW Option SW Option Major function improvement Corrections and minor function improvement SW Service Release System version V3 0 or higher System SW Update System version V1 0 V2 1 Software Version System version V3 0 or higher Option Upgrade All System versions SW Option SW Option ServoS 9105 6 Revision 02 Service Manual 6 1 SERVO s Ventilator System Troubleshooting 6 Troubleshooting General 6 2 Pre use check 6 3 Technical error codes 6 11 Only personnel trained and authorized by MAQUET shall be permitted to perform installation service or maintenance of the SERVO s Make sure to prepare the SERVO s properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted in a log book After any installation maintenance or service intervention in the SERVO s perform a Pre use check Refer to the SERVO s Ventilator System User s Manual for details This product contains electr
97. reme caution if fault tracing or adjustments are performed with power supply connected and with the patient unit covers removed 4 Revision 02 Service Manual 4 15 SERVO s Ventilator System Disassembling and assembling Remove the User Interface from the Patient Unit To remove the User Interface from the Patient Unit Disconnect the Control cable at the Patient Unit Open the main cover While firmly holding the User Interface 1 loosen the screws 2 Lift off the User Interface Gas modules To remove the gas modules Open the main cover Loosen the two screws holding the locking rail 1 Pull off the gas modules 2 When assembling make sure that the connector muff properly seals around the inspiratory pipe 3 The connector muff must not be pushed too far onto the nozzle units 4 ServoS 9041 ServoS 9042 ServoS 9045 4 4 16 Service Manual Revision 02 Disassembling and assembling SERVO s Ventilator System Battery modules To remove the battery modules Remove the main cover Unscrew and remove the knob 3 Pull off the battery modules Battery module in slot 1 1 Battery module in slot 2 2 The battery modules to be used are the same as for SERVO i Note Replace both battery modules at the same time PC 1771 Control and PC 1772 Monitoring To remove PC 1771 and or PC 1772 Remove the main cover
98. required when replacing parts included in the Maintenance kit 5 000 hours If not stated otherwise refer to chapter Disassembling and assembling for instructions The letters A D in the text below refers to the description of the Maintenance kit above Prepare the unit as described in section Preparations above in this chapter Gas modules A Replace filters in the gas modules When replacing filter move the rubber seal from the old to the new filter ServoS 9079 ServoS 9082 7 7 4 Service Manual Revision 02 Preventive maintenance SERVO s Ventilator System B Replace plastic nozzle units in the gas modules After replacement of plastic nozzle units wait 10 minutes before connecting pressure to the gas modules Inspiratory pressure transducer filter C Replace the filter for the inspiratory pressure transducer Make sure that the filter is correctly seated into the rubber ring Refer to instructions in the SERVO s Ventilator System User s Manual Note This filter may already be replaced as a part of the Extended cleaning of Inspiratory channel performed in combination with the Preventive maintenance Bacteria filter for O2 cell D Replace the bacteria filter for the O2 cell if applicable Refer to instructions in the SERVO s Ventilator System User s manual chapter Maintenance Note This filter is not used on the O2 Sensor ServoS 9080 ServoS 9081 7
99. ribed in chapter Service procedures Safety inspection Make a visual inspection of the SERVO s for external defects or damages Replace defective or damaged parts Check the mains power cable and control cable and their connections for damage Perform a leakage current test The leakage current test is a standard procedure regulated by IEC 60 601 1 or corresponding national standards Allowable values and test methods are defined in the standard The use of a leakage tester e g Bender Safety Tester 601 751 or equivalent is recommended Check that a SERVO s Ventilator System User s Manual corresponding to the installed System version is present Also check that operating manuals for all optional equipment connected to the SERVO s are present Completing the Preventive maintenance Perform a Pre use check Refer to the SERVO s Ventilator System User s Manual Perform Function checks on the optional equipments connected to the SERVO s Refer to the operating manuals for these optional equipments Reset the Preventive maintenance time meter Use the reset button select Menu Biomed Service Report PM or use the FSS Also note in a SERVO s log book that a Preventive maintenance has been performed 8 Revision 02 Service Manual 8 1 SERVO s Ventilator System Index 8 Index Alphabetic index 8 2 Only personnel tr
100. rnal fan 4 18 Inspiratory channel 4 18 Safety valve membrane 4 18 PC 1861 Pneumatic back plane 4 19 PC 1784 Expiratory channel 4 19 PC 1785 Expiratory channel connector 4 20 Expiratory valve coil 4 20 Expiratory cassette membrane 4 21 Control cable 4 22 Only personnel trained and authorized by MAQUET shall be permitted to perform installation service or maintenance of the SERVO s Make sure to prepare the SERVO s properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted in a log book After any installation maintenance or service intervention in the SERVO s perform a Pre use check Refer to the SERVO s Ventilator System User s Manual for details This product contains electronic and electrical components Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards 4 4 2 Service Manual Revision 02 Disassembling and assembling SERVO s Ventilator System General Disassembling of the SERVO s is described in this chapter If not stated ot
101. rresponding to the temperature inside the Patient Unit is used for regulation of the Internal Fan Includes an ID PROM The ID information can be read by the SERVO s 3 Revision 02 Service Manual 3 11 SERVO s Ventilator System Description of functions Battery modules There are two backup Battery modules connected The Battery module is a 12 V 3 5 Ah Nickel Metal Hydride rechargeable smart battery To calculate its own status the battery uses an internal highly accurate voltmeter amperemeter and time clock to measure actual charge in and out of the battery In addition there are algorithms to compensate for the effects of discharge rate discharge temperature self discharge and charging efficiency etc Even with this technology the only time at which the battery charge status is absolutely reliable is when it is either completely full or completely empty What s more if the battery only sees partial charges and discharges during its application then it may not get the benefit of a full or empty reference point for some time and must rely more and more on its calculated figure The life span for the Battery module is calculated to two and a half year from manufacturing date Normal time for logistics and storage are included in this calculation The calculation corresponds thus to an estimated operational time of two years Manufacturing date year week is printed on the battery label System SW ver
102. s in the system It activates pressure reducing mechanisms including activation of the safety valve in case of excessive breathing system pressure All alarms are conveyed and displayed on the front panel and the alarm sound is also generated In case of malfunction in the loudspeaker located on PC 1777 Panel a backup sound generating device buzzer on PC 1772 will be activated automatically This buzzer is monitored by a microphone at startup and during the Pre use check The following voltages are supervised 24 V 12 V 12 V 5 V 3 3 V The buzzer on PC 1772 Monitoring generates the alarm signal in case of 5 V or 3 3 V power failure The buzzer and 5 V 3 3 V failure logic is powered by backup capacitors in case of power failure The alarm signal used by the optional Alarm output connection is generated on PC 1772 PC 1772 also contains a barometric transducer and the measured barometric pressure is supplied to the other sub units in the system Trending of measured parameters are performed by Monitoring A thermistor on PC 1772 monitors the temperature inside the Patient Unit An alarm is activated if the temperature is 77 5 C 170 9 F or higher Includes an ID PROM The ID information can be read by the SERVO s Note The System SW must be re installed if PC 1772 is replaced A lithium battery on PC 1772 power supplies the internal memory on the PC board If the battery on P
103. sion V2 01 00 or higher includes an improved monitoring of the battery status This System SW will among others monitor Expiry date If the operational capacity is too poor for continued usage In both cases battery replacement information will be shown on the User Interface Select Status Batteries on the User Interface to check battery status For further information refer to chapter Service procedures section Battery modules With the charge status indicator on the User Interface the four green LEDs on the Battery module are no longer required and will be removed from the Battery modules Recharge time for a discharged battery is approx 3 hours battery If a battery is fully discharged e g due to long storage time it may require up to 12 hours charging time Each Battery module includes an ID PROM The ID information can be read by the SERVO s Internal fan The Internal Fan forces cooling air through the Patient Unit The cooling air flow inside the Patient Unit is indicated in the Functional Main Block Diagram The Internal Fan is controlled by the Temperature Sensor on PC 1863 Power control The fan will start with half effect at approx 33 C 91 F and with full effect at approx 43 C 109 F When the temperature drops below approx 37 C 99 F the fan turns to half effect and when the temperature drops below approx 27 C 81 F the fan stops The air inlet is prote
104. sure transducers Checks that the leakage at 80 cm H2O is max 10 ml min Checks that the measured pressure values differs less than 5 cm H2O between Insp and Exp BRE If message Leakage or Excessive leakage appears 1 Check that the test tube is correctly connected 2 Check the expiratory cassette Check that the cassette is correctly seated in the cassette compartment If possible replace the expiratory cassette and check if the new cassette is accepted by the Pre use check If the new cassette was accepted by the Pre use check the fault was located to the cassette To repair the old cassette check that the expiratory valve membrane is clean and correctly seated in the cassette Replace the membrane if required 3 Check that the pressure transducer tubes filters are correctly mounted 4 Check the inspiratory section Check that the inspiratory pipe is correctly mounted in the inspiratory section Check that the safety valve membrane is clean and correctly seated in the inspiratory pipe Check that the safety valve closes properly when the Pre use check is started distinct clicking sound from the valve If the safety valve opens during this test the opening pressure may not be correctly calibrated see Safety valve test below Run the Safety valve test and repeat the complete Pre use check Troubleshooting SERVO s Ventilator System
105. ted wall and or cylinder Regular cleaning and extended cleaning of the inspiratory channel are performed Refer to instructions in the User s Manual With power supply connected to the SERVO s there are energized electrical components inside the unit All personnel must exercise extreme caution if fault tracing or adjustments are performed with power supply connected and with user interface and patient unit covers removed Service The SERVO s must be serviced at regular intervals by personnel trained and authorized by MAQUET Any maintenance or service must be noted in a log book provided It is recommended that maintenance and service is done as a part of a service contract with MAQUET For functionality enhancement the latest released System SW version is always recommended Preventive maintenance must be performed at least once every year as long as the unit is not used more than normal Normal operation is estimated to correspond to approx 5 000 hours of operation Details are found in this Service Manual chapter Preventive maintenance The Battery modules shall be replaced after two and a half years from their manufacturing date The internal Lithium batteries on PC 1771 and PC 1772 shall be replaced every five years Worn out batteries must be recycled or disposed of properly in accordance with appropriate industrial and environmental standards This product co
106. test Patient circuit test information added 6 11 Error code 2 and 3 Recommended actions corrected 6 14 Error code 48 49 and 50 Information added 6 15 Error code 20005 Information added 6 16 Restart ventilator Information added 7 2 General Battery module life span information changed 7 6 Battery modules Battery module maintenance information changed 7 6 Completing the Preventive maintenance Preventive maintenance time meter and log book information corrected Service Manual revision history SERVO s Ventilator System 9 4 Service Manual Revision 02 9 Revision 02 Revision history table Revision 02 In the table below the following keywords are used in Comment column Added Information added to the manual e g due to new functionality Changed Information changed in the manual e g due to changed functionality Corrected Corrections made due to printing errors or lack of information in the previous version of the manual General changes Revision 02 O2 Sensor is added as an alternative to the O2 cell in several texts throughout the manual These changes are not included in the Revision history table below Page Section Comment 1 4 Symbols used in this manual Symbols changed 1 5 Service System SW recommendation added 1 5 Hazard notices Cleaning information corrected 1 6 Environmental declaration Backlight Inverter corrected
107. the internal leakage test see above has passed the leakage is to be located to the patient circuit Check for leakage or replace the patient circuit Alarm state test Checks that no Technical error alarms are active during the Pre use check MON Refer to section regarding Technical error alarms for further information External alarm system test If the option Alarm Output Connector is enabled the user can test the external alarm system The external alarm output signal is activated and the user must verify the external alarm 1 Check the external alarm system 2 Replace PC 1862 DC DC amp Standard Connectors The result of the test does not affect the outcome of the Pre use check Test Test description Recommended action if the test fails Separate Patient circuit test This test separately performs the Patient circuit test as described above See above SERVO s Ventilator System Troubleshooting Revision 02 Service Manual 6 11 6 Technical error codes The table below shows recommended actions in case of Technical error alarms Some of the Error codes are intended only for R amp D not for field service If so the text N A is stated in the Recommended action column Error code Error message Possible cause Recommended action Monitoring 1 POWER_FAILURE_MINUS_12_VOLTS_ TOO_LOW i e lt 13 2 V 1 Replace PC 1862 DC DC amp Standard Connectors
108. troduction A number of optional equipment can be added to the SERVO s Ventilator System For further information refer to the documents listed below Mobile cart SERVO s SERVO s User s manual Mobile cart SERVO s Installation Instructions Shelf base SERVO s SERVO s User s Manual Shelf base SERVO s Installation Instructions Support Arm 176 177 SERVO s User s Manual Support Arm 176 177 Installation Instructions Gas cylinder restrainer SERVO s SERVO s User s manual Gas cylinder restrainer SERVO s Installation Instructions Aeroneb Pro Aeroneb Pro Instruction Manual Aeroneb Pro Installation Instructions Compressor Mini SERVO s User s Manual Compressor Mini Operating Manual Compressor Mini Service Manual Compressor Mini Installation Instructions Alarm output connector SERVO s User s Manual Alarm output connector Reference Manual Humidifier Humidifier Holder and Humidifier Holder for rail SERVO s User s Manual Humidifier Operating Manual Humidifier Holder Installation Instructions Waterbag pole Instructions mounted on the pole User Interface panel cover SERVO s User s Manual User Interface panel cover Installation Instructions Loudspeaker booster kit Loudspeaker booster kit Installation Instru
109. ully disconnect the cable connector 2 Carefully disconnect the backlight lamp cable connectors 3 Remove the screws 4 holding PC board Backlight Inverter Lift off PC board Backlight Inverter Type 2 To remove the PC board Backlight Inverter 5 Carefully disconnect the cable connector 6 Carefully disconnect the backlight lamp cable connector 7 Loosen the screws 8 Remove the screws 9 holding PC board Backlight Inverter Lift off PC board Backlight Inverter Note When assembling make sure that the plastic washers on screws 8 are fitted between the PC board and the screwhead ServoS 9023 ServoS 9095 4 Revision 02 Service Manual 4 7 SERVO s Ventilator System Disassembling and assembling TFT Display Note Disassembling of the TFT Display must be performed in a clean and dustfree environment as the TFT Display is sensitive to contaminants Type 1 The TFT Display is mounted under the support plate 1 To remove the TFT Display Carefully disconnect all cables from PC 1777 The Backlight Inverter cable and the Loudspeaker cable can remain connected Carefully disconnect the Backlight lamp cables from PC board Backlight Inverter Remove the screws 2 holding the support plate Lift off the support plate assembly including TFT Display and PC boards Type 2 The TFT Display is mounted under the support p
110. unt the TFT Display 7 onto the new support plate 5 using the new M3x6 mm screws Attach the cushion 9 onto the EMC filter 11 as shown in the illustration Connect the cable 10 to the TFT Display Organize the cable place the EMC filter in the support plate recess and secure with the retainer 12 as shown in section TFT Display below Mount the remaining parts onto the new support plate Use the new M3x8 mm screws PC 1777 6 PC board Backlight Inverter 4 Loudspeaker 3 Restore the complete assembly into the front panel section Connect all remaining cable connectors Restore the User Interface Replacement of PC 1777 Type 1 PC 1777 Type 1 is discontinued and no longer supplied as spare part To replace such PC 1777 the Replacement kit for PC 1777A D must be used Note The Disassembling Assembling instructions and the illustration below is valid only for the Replacement kit for PC 1777A D The kit contains all parts required for the replacement PC 1777 of Type 2 6 PC 1777 TFT Display cable of Type 2 10 Support plate 5 Cushion for the EMC filter 9 Retainer 12 Screw M3x8 mm 24 each Screw M3x6 mm 4 each 4 4 6 Service Manual Revision 02 Disassembling and assembling SERVO s Ventilator System Backlight Inverter Type 1 To remove the PC board Backlight Inverter 1 Caref
111. vention in the SERVO s perform a Pre use check according to instructions in the SERVO s Ventilator System User s Manual Important General Service documentation for the SERVO s Ventilator System consists of User s Manual The User s Manual is an indispensable complement to the Service Manual for proper servicing Service Manual Installation Instructions Spare Parts information Documentation for all optional equipment included in the SERVO s System is also available The SERVO s Ventilator System is referred to as the SERVO s throughout this manual There are two serial number labels on the unit One label is attached to the Patient Unit close to the supply gas inlets The serial number stated on this label is the ID number of the Patient Unit The serial number is also stored in the SW memory as the System ID One label is attached to the rear side of the User Interface close to the On Off switch The serial number stated on this label is the ID number of the User Interface System version number can be found in the Status window on the User Interface Make sure that the version of the User s Manual corresponds to the System version Text inside a box is used to highlight important information In addition to the Important information given here and in the related documents e g in the User s manual always pay attention to applicable local and natio
112. vers The measuring process is controlled from the main block PC 1784 Expiratory Channel SVX9018X The left hand side transducer is sending out ultrasonic sound that is reflected against the inner wall of the expiratory channel The ultrasonic sound is received by the right hand side transducer now acting as a receiver The time from sending to receiving ultrasonic sound in downstream expiratory gas flow is measured Then the right hand side transducer earlier receiving is sending out ultrasonic sound upstream the expiratory gas flow The ultrasonic sound is received by the left hand side transducer now acting as a receiver The time from sending to receiving ultrasonic sound in upstream expiratory gas flow is measured The time difference between the downstream and the upstream time measurements provides flow information A temperature sensor inside the cassette measures the expiratory gas temperature This temperature measurement is also used when calculating the expiratory flow Bacteria filter and expiratory pressure tube Via a Bacteria Filter inside the cassette the Expiratory Pressure Tube connects the cassette to the Expiratory Pressure Transducer The filter and the connector are integrated parts of the cassette The filter protects the transducer on PC 1781 Pressure Transducer from contamination Expiratory valve The Expiratory Valve consists of a membrane in the cassette that is operated by the axis of the Expi
113. version V3 1 or higher SERVO s Ventilator System Troubleshooting Revision 02 Service Manual 6 3 6 Pre use check The SERVO s demands the user to start the automatic Pre use check at every startup of the unit It is also possible to select the Pre use check via the Standby menu The SERVO s Ventilator System User s Manual describes how to perform this Pre use check The Pre use check description on the following pages gives more detailed information about the Pre use check This information can be used e g during troubleshooting of the unit Some of the recommended actions described below refer to the Field Service System FSS The Service card is required to access the FSS Troubleshooting can of course be performed without access to the FSS but for some of the recommended actions the FSS will make troubleshooting faster and easier Check if the fault remains after each performed service action Re run the complete Pre use check or run the concerned test using the FSS Via the Standby menu it is possible to perform a separate Patient circuit test to evaluate circuit leakage and measure circuit compliance This test does not replace the complete Pre use check Text within brackets refers to the tested subsystem BRE Breathing MON Monitor PAN Panel Test Test description Recommended action if the test fails During system start up Internal technical tests SW check Reading E
114. wn on the User Interface corresponds to the actual Barometric pressure value at the local site The value shown on the User Interface may not differ more than 5 from the actual barometric pressure If the value shown on the User Interface differs more than 5 from the actual barometric pressure the barometer in SERVO s must be calibrated FSS is required Gas supply pressure transducers Connect the gas supplies Air and O2 Select Status General on the User Interface Disconnect the gas supply one gas at the time Check that the corresponding supply pressure value in the Status window drops Battery modules System SW version V2 01 00 or higher includes an advanced monitoring of the battery status The System SW will among others monitor Expiry date The life span for the Battery module is calculated to two and a half year from manufacturing date If the operational capacity is too poor for continued usage In both cases battery replacement information will be shown on the User Interface Select Status Batteries on the User Interface to check battery status For further information refer to chapter Service procedures section Battery modules Note Replace both batteries at the same time Lithium batteries Check manufacturing date for the lithium batteries mounted onto PC 1771 and PC 1772 The batteries must be replaced after 5 years Replacement is desc

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