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Panasonic Mini ECO-i Service Manual

1. Manifold gauge Lo Q 2 Hi um ll d fe ad qe Refrigerant E F i recovery unit O m Refrigerant recovery cylinder EA D Fig 2 2 2 6 Mini VRF SYSTEM 3 Recovering Refrigerant Outdoor Unit Repair Procedures 3 2 Refrigerant Recovery Procedures Indoor Unit The flowchart below shows the refrigerant recovery procedures you must follow when replacing or repairing the indoor unit due to trouble in the refrigerant circuit START Y 3 2 1 Cooling operation for all units Y Ball valve is provided in theindoorunit ge 3 2 3 Refrigerant recovery eg Turn off all equipment in system i YES NO procedures 2 i 3 2 2 Refrigerant recovery Replace or repair faulty unit procedures 1 E r y z Tum off all equipment in system Check for T in repaired unit Y When replacing or repairing a faulty Evacuate air from repaired unit unit let other normal indoor units run i excluding indoor unit where refrigerant NO Charge refrigerant in repaired unit is recovered Amount of charge should equal that 1 YES recovered by refrigerant recovery unit Power can independently be tur
2. C1 condenser 1 thermistor m uc Mini VRF SYSTEM ayout Diagram Sensors Outdoor Unit Repair Procedures TS suction thermistor C1 condenser 1 thermistor Mini VRF SYSTEM 1 Removing Panels Outdoor Unit Repair Procedures 1 Front panel removal Fig 2 1 Remove the front panel remove 3 screws 2 Cover A removal Fig 2 1 Remove the cover A remove 1 screw Front panel Cover A E ep Mini VRF SYSTEM 2 Discharging Oil in Compressor Outdoor Unit Repair Procedures Recover the refrigerant in the outdoor unit following the procedures in 3 Recovering Refrigerant Remove the compressor and discharge the oil in it Refer to 8 Compressor for detailed procedures 2 1 Checking the Oil Acceptance rejection criteria for the oil Condition of Condition of oil Judgment criteria for changing oil refrige
3. to recover the refrigerant when removing and installing the sensor 9 1 Removing the High Pressure Sensor 1 Refer to 1 Removing Panels and remove the front panel 2 Disconnect the high pressure sensor connector 3P BLK from terminal CN29 on the outdoor unit control PCB of the outdoor unit where the high pressure sensor will be removed 3 Use 2 adjustable wrenches in combination to remove the high Py pressure sensor The high pressure sensor connection port on D the outdoor unit includes a Schrader type j E valve When removing the high pressure AA n4 k A EI sensor internal pressure will be applied from J Bh the refrigerant in the outdoor unit 7 GIE NI Eb S D d 9 2 Installing the High Pressure Sensor ES A E 1 Use 2 adjustable wrenches in combination to install the high Bc gt pressure sensor vr pce RBS E eu Fig 2 18 Mini VRF SYSTEM Contents Outdoor Unit Maintenance Remote Controller 3 OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER pe IIT e AN a eden a Bl o A E eae e 3 2 2 FUNCUONS ara is a ER CR C CO ARA da toa 3 3 3 Ordinary Display Controls and Functions 3 4 4 Monitoring Operations 42 c9 kick ange OCC a e o XC e CC QC 3 9 5 Outdoor Unit Alarm History Monitor 000 cece eee 3 11 6 Mode Settings cca vias edo teeing ene shawna decrees ari e een wee de do RR 3 12 1 Overview OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER CZ RTC2 for MINI V
4. 7 Prepare to disconnect the 2 welded locations shown in Fig 2 17 Protect the sensors and the surrounding plates rubber lead wires clamps and other items 8 Disconnect the 2 welded locations shown in Fig 2 17 9 Tilt the compressor toward you slightly Lift it off of the bolt at the rear of the compressor then pull the compressor toward you Mini VRF SYSTEM Outdoor Unit Repair Procedures Outdoor unit o a e o Liquid tube Sean service port D Ces Liquid tube valve o Dry core Ball valve Fig 2 15 CZ E E e Cover A Fig 2 16 Welding locations to disconnect 2 Cushioning rubber 3 locations Washer with collar 3 locations Fig 2 17 8 Compressor Mini VRF SYSTEM 9 High Pressure Sensor Outdoor Unit Repair Procedures H Installation 1 Prepare for installation Remove the rubber stopper and tube cap welded from the new compressor 2 Install the crankcase heate
5. Minimum insulation resistance as required by generally accepted requirements is 1 MQ Reference Symptoms of motor burning 1 Ground fault results in breaker operation 2 Short circuit results in different coil resistance at different phases 3 Open circuit 8 2 Compressor Replacement 1 Follow the instructions in 8 4 Replacing the Compressor and replace compressor in the failed unit 2 Fully close the high and low pressure gauge valves on the manifold gauge then stop the vacuum pump 3 Disconnect the manifold gauge from the vacuum pump Connect the manifold gauge to the refrigerant cylinder At this time be careful that air does not enter the refrigerant tubing A Do not use the recovered refrigerant Use a refrigerant cylinder that contains new refrigerant 4 Open the valve on the refrigerant cylinder When charging with the amount of recovered refrigerant is completed or when charging with the amount of recovered refrigerant is not completed but no more refrigerant will enter the unit first turn the power OFF at the repaired outdoor unit then remove the short circuit at the AP pin CN46 Then fully open all valves on the gas tube and liquid tube 5 If charging with the amount of recovered refrigerant was not possible fully close the high pressure gauge valve on the manifold gauge Then while the unit is operating in Cooling mode open the low pressure gauge valve on the manifold gauge and charge with th
6. 2 If the fan motor is locked replace the fan motor Example Notes Turn OFF the power and check the conductivity of and on the main PCB P26 alarm Alarm code P26 Alarm meaning Inverter compressor high frequency overcurrent alarm Alarm conditions This alarm occurs when current trouble or current detection trouble occurs at an inverter frequency of 80 Hz or higher after start when trouble judgment current is detected in the primary or secondary current or when an instantaneous secondary current of 48 A or higher is detected Probable cause The detection methods are the same as for P16 However the fact that operation up to high frequencies is possible does not necessarily mean that a compressor failure is the cause of the trouble Start the compressor several times If alarm P26 occurs every time and alarm P16 does not occur at all then the possibility of a compressor failure is low Check Check the power wiring and connector wiring Correction It is possible to resolve this trouble by limiting the maximum frequency Example Notes Mini VRF SYSTEM 4 Mini VRF Alarm Codes Trouble Diagnosis P29 alarm Alarm code P29 Alarm meaning Inverter compressor missing phase or lock alarm Alarm conditions This alarm may occur at start and occurs when missing phase or lock is detected and when a DCCT failure occurs Probable cause Generally this alarm occurs when the
7. CANCEL button and CHECK button simultaneously for 4 seconds or longer 2 The following appears on the remote controller LCD dis play UNIT No X X main unit No CODE No XX sensor address and service monitor 4 00XX sensor temperature See figure at right 3 Press the temperature setting Ga and CY buttons to change the item code to the sensor address of the sensor you wish to monitor For the relationship between the sensor address and sensor type refer to the sensor temperature relationship table below 4 If group control is in effect press the UNIT UNIT 1 4 button to change to the unit you wish to monitor u Display shows a discharge temperature of 85 C 5 Press the 4 CHECK button to return to normal at unit No 1 1 remote controller operation The temperature display for units that are not connected The temperature on the remote controller is appears as displayed in Celsius C Please note that you will not mistakenly read it in e f monitor mode is engaged during normal operation only Fahrenheit F on the display the part of the LCD display indicated in the figure changes e Returns to normal display The other parts remain unchanged during normal operation Sensor Temperature Relationship Table Location where Sensor Sensor sensor is installed address Sensor type
8. Fig 2 5 Mini VRF SYSTEM Outdoor Unit Repair Procedures 4 Checking for Leakage After Repair 4 1 Pressure Check for Leakage of Outdoor Unit After completing repair of the outdoor unit carry out the following leakage check 1 Check that all service valves for gas line and liquid line in the repaired outdoor unit are fully closed 2 Connect the manifold gauge valves to the high and low pressure sensor outlets of the outdoor unit 3 Feed nitrogen gas into the circuit until 362 6 psi pressure is reached If it is apparent that the nitrogen gas is not entering the repaired section interrupt the feeding Short circuit the AP pins CN46 on the outdoor unit control PCB turn on power to run the outdoor unit then resume feeding nitrogen 4 Apply soapy water to the repaired part such as a newly welded part and briefly inspect for any leakage If there are any leaks bubbles will show on the tubing surface To continue the air tight check after the brief leak inspection turn on power while short circuiting the AP pins Again feed in nitrogen gas to obtain a system pressure of 362 6 psi Then measure both the outdoor ambient temperature and the pressure in the system Leave the system in this state for 1 full day and night and again measure the outdoor ambient temperature and pressure to determine any reduced values During the inspection it is recommended that an awning or cover be used to shield the unit in case of rain If no
9. Outdoor unit PCB RC 3P BLU PCB connector 3P BLU MS gt gt 2 DET Special service checker wiring Relay connector 2P WHT Remote controller Ass y e f the communications line in the inter unit control wiring is connected it can be left as is n case of an independent outdoor unit 1 maintenance remote controller connected to 1 outdoor unit automatic address setting for indoor units not completed both setting mode 1 and setting mode 2 can be used e The overall system status for that refrigerant system is displayed 3 Ordinary Display Controls and Functions O All units start stop Fig 3 1 lt Operation gt The _ ON OFF operation button can be used to start and stop all the indoor units The LED illuminates if any indoor units is operating The LED blinks if an alarm at any of the operating indoor units occurs e Cooling heating change Fig 3 1 lt Operation gt The MODE button can be used to change between heating and cooling operation The display indicates the operating mode of the indoor unit with the lowest unit No All units test run Fig 3 2 Operation The CHECK button can be used to start and stop a test run for all indoor units Press and hold for 4 seconds to turn ON During the test run TEST is displayed The status of test runs performed from the indoor unit remote controller is not displayed o
10. v buttons to select the desired setting data For item codes and setting data refer to the following page 6 Press the button The display stops blinking and remains lit and setting is completed MD Press the A button to return to normal remote controller display Mini VRF SYSTEM 2 Detailed Settings Function Remote Controller Functions List of Detailed Setting Items Setting data Item code Item No Description No Description No Description 1 Way Air Discharge 4 Way Air Discharge Mini Slim Concealed 0000 Semi Concealed D HUT Semi Concealed Ut Y1 0005 Duct F1 M1 1 T Concealed Duct High T La ype 0006 Static Pressure E1 0007 Ceiling Mounted T1 0008 Wall mounted K1 Concealed Floor 0010 Floor Standing P1 0011 Standing R1 0001 22 Type 7 0003 28 Type 9 0005 36 Type 12 71 Type 24 7 45 Type 15 0009 56 T 18 19 ia iare kees Type 15 lidad 0011 For 24MP1U6 S 24MR1U6 capacity 0012 80 Type 24 0015 112 Type 36 0017 140 Type 48 Except S 24MP1U6 S 24MR1U6 0018 160 Type 54 0001 Unit No 1 0002 Unit No 2 IC address 2 2 0030 Unit No 30 0099 Not set 0001 Unit No 1 0002 Unit No 2 Indoor unit 0003 Unit No 3 f address H 0064 Unit No 64 0099 Not set 0000 Individual 1 1 Indoor unit with no group w
11. 4 buttons ger A and ger Press the button Automatic reset Press the button When settings are made from a remote controller the indoor unit where that remote controller is connected stops Entire system stops sf Mini VRF SYSTEM 3 Remote Controller Servicing Functions Remote Controller Functions Test Run Function Operates the unit with the thermostat forced ON lt Procedure gt D Press and hold the button for 4 seconds or longer Test appears on the remote controller LCD display Fig 4 3 9 Start operation Press the button to return to normal remote controller display CZ RTC2 Fig 4 3 3 Remote Controller Servicing Functions E Sensor Temperature Display Function displayed regardless of whether unit is operating or stopped The procedure below displays the sensor temperatures from the remote controller indoor unit and outdoor unit on the remote controller lt Procedure gt D Press and hold the F and buttons simultaneously for 4 seconds or longer 2 The unit No X X main unit No item code XX sensor address and servicing monitor HH XX sensor temperature are displayed on the remote controller LCD display See Fig 4 4 at right Press the temperature setting A H l v d buttons and select the item code to the address of the sensor to monitor
12. For the relationships between the sensor addresses and sensor types refer to the table of temperature sensors and addresses on the next page Q If group control is in effect press the button to select the unit to monitor Press the temperature setting buttons to select the item code to change 5 Press the button to return to normal remote controller display Mini VRF SYSTEM Remote Controller Functions CZ RTC2 The temperature on the remote controller is displayed in Celsius C Please note that you will not mistakenly read it in Fahrenheit F on the display Fig 4 4 The temperature display appears as for units that are not connected If monitor mode is engaged while normal operation is in progress only the parts of the LCD display shown in the figure will change Other parts continue to display the same information as during normal operation Mini VRF SYSTEM 3 Remote Controller Servicing Functions Remote Controller Functions Indoor unit sensors v mate temp ml o fe E3 ES Discharge temp o Discharge temp setting Position of indoor unit electronic control valve Outdoor unit sensors Discharge temp 1 OG High pressure sensor temp Heat exchanger gas 1 Heat exchanger liquid 1 eae a a aaae Inverter primary current 14 15 MOV1 GE Mini VRF SYSTEM Contents Trouble Diagnosis 5
13. press the button At this time ama stops blinking and remains lit a aa iss o amp During this mode EXITO is displayed blinking The display shows the set outdoor unit address System XX YY System XX System address YY Address at outdoor unit sub bus item code number DN value in the table below and the setting data 8 digits The setting data is displayed in 8 digits The display changes between the first 4 digits Fig and the last 4 digits Fig amp When the first 4 digits are displayed the bottom dot of the colon is lit To exit setting mode press the CHECK button Returns to the normal display mode O Display of first 4 digits Display of last 4 digits H1 lt Refrigerant type and are displayed alternately Example shows 0000 0410 R410A List of Item Codes DN Parameter Description Outdoor unit capacity 112236 Type 160 52 Type Mini VRF SYSTEM Contents Remote Controller Functions 4 REMOTE CONTROLLER FUNCTIONS 1 Simple Settings Function ccoo ra eee hn ee aaa 4 2 2 Detailed Settings Function wx AE ENNEN EEEEE RR hr ee eee EN RE a Ras 4 4 3 Remote Controller Servicing Functions 0 2 0c e eee eee eee 4 15 Mini VRF SYSTEM 1 Simple Settings Function Remote Controller Functi
14. 05 can be set from O to 1 EEPROM Max fan e setting mode Effect Capacity ratio 0 14 Normal operation setting at time of factory shipment 100 1 12 Noise reduced by approx 3 dB from the catalog value Approx 80 2 Short circuit the SILENT 2P pin on the outdoor unit PCB Noise reduction mode is engaged constantly when this pin is short circuited To operate in noise reduction mode only at night or for similar control at other times use an external timer field supply 14 2 Slime Countermeasure EEPROM OC set only on the main unit This setting controls the operation of the drain pump EEPROM Details of operation setting 0 Normal operation setting at time of factory shipment 1 Drain pump operates for 20 minutes at 2 hour intervals 2 Drain pump operates for 20 minutes at intervals of 20 minutes 3 Drain pump operates continuously 14 3 Delayed Start for Each System Outdoor EEPROM 3E The operation start time can be delayed according to the set system addresses This setting reduces voltage drops by preventing multiple systems from starting at the same time when operation is restarted after recovery when multiple operating systems were stopped due to a power outage or other cause EEPROM Effect setting 0 Delayed start is not performed setting at time of factory shipment 1 System address Delay in seconds before start 2 Start after System add
15. Alarm Codes F31 alarm Mini VRF SYSTEM Trouble Diagnosis Alarm code F31 Alarm meaning Outdoor unit non volatile memory EEPROM trouble Alarm conditions 1 Non volatile memory is not present when power initialization occurs 2 Read values do not match after writing to non volatile memory is complete Probable cause 1 Memory was not inserted after the PCB was replaced 2 The lifetime of the non volatile memory has been reached 3 Non volatile memory is installed incorrectly wrong direction bent pins etc Check 1 Check the non volatile memory on the PCB Correction Example Notes H03 alarm Alarm code H03 Alarm meaning Compressor CT sensor disconnected or short circuit Alarm conditions Alarm occurs if the current value is 1 5 A or less when 2 seconds or longer have elapsed after output from that compressor started No current is detected even though the compressor is operating Probable cause 1 CT circuit failure including cut wiring etc 2 Disconnected CT circuit connector 3 This CT circuit is connected to the connector of the other CT circuit 4 PCB failure 5 Noise Check 1 CT circuit failure PCB failure Trouble Current value during compressor operation is below the threshold value Check e Check that the connector is not disconnected Check the continuity of the CT circuit Install a normal CT in place
16. Alarm Codes Trouble Diagnosis F16 alarm Alarm code F16 Alarm meaning High pressure sensor trouble Alarm conditions The saturation temperature at the detected pressure is 10 F or more below the highest indoor unit E1 temperature continuously for 30 minutes Probable cause 1 High pressure sensor malfunction 2 Failure to connect the connector to the outdoor unit PCB 2 3 Failure to open the service valve 4 Clogged tubing 5 Valve leakage 6 Over charging 7 Outdoor unit PCB failure 8 Electrical noise Check 1 High pressure sensor failure Check for cut wiring Connect a gauge to the high pressure outlet and check for changes in the value displayed by the monitoring software and for large deviation of the gauge pressure During heating check whether the temperature is lower than the highest indoor unit E1 temperature The pressure detected by the high pressure sensor is the highest pressure in the system Therefore during heating the converted saturation temperature will never be lower than any indoor unit E1 temperature During cooling this temperature will never be lower than the outdoor unit liquid temperature 2 Failure to open the service valve clogged tubing valve leakage over charging In all of these cases an alarm occurs when there are rapid pressure fluctuations and tracking of the detected pressure is poor Check the open closed status of the valve Check for valve leakage and over ch
17. Control 1 The controls listed below are performed according to the pressure sensor attached to the outdoor unit and temperature thermistor attached to the indoor outdoor unit heat exchanger With roadmap control the pressure detected by the pressure sensor is converted to saturation temperature before it is used The temperature that has been converted to the saturation temperature is called the pres sure sensor temperature 2 This control is performed every 30 seconds 3 In the evaporation temperature control and condensation temperature control shown in Figs 1 1 and 1 2 the temperatures used to judge each area A AB B and C may vary depending on the relationships among factors including the difference between the room temperature setting and the indoor unit air intake temperature air intake temperature difference and the difference between the air discharge temperature setting and the air discharge temperature air discharge temperature difference 4 Definitions of the evaporation temperature and condensation temperature Evaporation temperature Te Lowest temperature of the heat exchangers E1 E3 in all indoor units Condensation temperature Tc The value used for judgment in Cooling mode and Heating mode is different depending on the mode Cooling mode The outdoor unit pressure sensor temperature or the outdoor unit heat exchanger liquid temperature whichever temperature is higher Heating mode
18. PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer Correction Example Notes F08 alarm Alarm code F08 Alarm meaning Outdoor air temperature sensor trouble Alarm conditions 1 A D step is 10 steps or less short circuit A D step is 1014 steps or more open circuit Probable cause Sensor malfunction including connector a NN EN 2 1 2 PCB malfunction 1 2 Check Measure the sensor resistance Check that the sensor is operating normally Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer Correction Example Notes F12 alarm Alarm code F12 Alarm meaning Compressor intake temperature sensor trouble Alarm conditions 1 A D step is 10 steps or less short circuit A D step is 1014 steps or more open circuit Probable cause 2 1 Sensor malfunction including connector 2 PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer Correction Example Em Notes E Mini VRF SYSTEM 4 Mini VRF
19. Pressure a EE 0007 Ceiling Ft T1 EN 180 E o Ee e o EE 75 e X indicates that there is no corresponding filter indicates the filter sign ON time that is set at shipment High fouling Set when GG is selected for the degree of filter fouling item code OO 0006 Unit hour Mini VRF SYSTEM 2 Detailed Settings Function Remote Controller Functions Item code Item Description Set when using a central control device 03 Central control address Used when setting the central control address manually from the remote controller 0 Operating mode priority change Note 1 NOTE 1 Explanation of operation mode priority change Enabled only in MINI VRF heat pump models lt Function gt With indoor units that are installed in combination with an outdoor unit model where either heating or cooling operation can be selected the operating mode of the indoor unit that starts first takes priority The first indoor unit to operate can select any operating mode When any mode other than fan mode is selected then the operating modes that cannot be selected are not displayed on all remote controllers that are subsequently operated Operation change control in progress is displayed indicating that there are restrictions on the operating modes that can be selected Controlling the operating mode from a specific remote controller When there are multiple remote controllers in th
20. S 1 p ITT es in TES c E Manifold gauge Close to stop Lower side valve Le JON p A Mini VRF SYSTEM 6 Charging Compressor Oil Outdoor Unit Repair Procedures Next start Cooling mode operation of the outdoor unit to be oil charged When cooling operation reaches a stable condition open each valve corresponding to these procedures in the order given Procedure 1 Open the Hi side gauge manifold valve Procedure 2 Open the upper valve Procedure 3 Open the lower valve Using this series of procedures the oil in the oil charging tank will be pushed up by the pressurized refrigerant under cooling operation This charges the oil into the outdoor unit through the low pressure outlet port If you wish you can periodically close the upper valve of the oil charging tank and shake the tank gently to check the approximate amount of remaining oil inside Liquid tube service port For 95 16 connector Gas tube service port For 95 16 connector Low pressure outlet port For 95 16 connector sa Manifold gauge Procedure 1 Open t
21. The outdoor unit pressure sensor temperature or the indoor unit heat exchanger temperature E1 when the heating thermostat is ON whichever temperature is higher The E3 temperature may indicate the temperature of superheated gas Therefore it is not included for detection of the condensation temperature Tc Mini VRF SYSTEM 2 Compressor Control Control Functions 2 3 1 Roadmap control in cooling mode With this control the below evaporation temperature control and condensation temperature control are both used Control is performed according to the following order of priority Control order of priority Area C gt Area B gt Area A Example When Evaporation temperature control Area A and Condensation temperature control Area C then based on the above order or priority the result is Area C Reduce horsepower Evaporation temperature Te control Horsepower increase permitted Area A 41 1 F 41 0 F Horsepower increase prohibited Area B 35 6 F 35 4 F Horsepower decrease Area C Fig 1 1 1 For indoor units that are operating in Cooling mode if one unit is selected for a test run then the air intake temperature difference difference between the room temperature setting and indoor unit air intake tempera ture is ignored and areas B and C are considered to be area A for control purposes This is used for addi tional refrigerant charging test run checks etc For this reason vapor
22. after control Operates at a compressor frequency of 65 Hz Outdoor units However depending on the operating conditions the frequency may be lower than this value Electronic All indoor units operate at a fixed pulse according to the indoor Indoor control valve unit capacity units The fan operates at the set fan speed is stopped or operates at Fan L fan speed according to the operation mode of the indoor unit 3 4 Reverse cycle Defrost Control 3 4 1 Defrost control method Defrost with this system is done by reverse cycle defrost 3 4 2 Conditions for start of defrost Defrost control is started when the frost detection conditions are met and the defrost mask time has elapsed 3 Special Controls 3 4 3 Frost detection a Frost is not detected at the outdoor unit heat exchanger for 5 minutes after operation starts Mini VRF SYSTEM Control Functions b Frost is detected when either Condition 1 or 2 below is met Heat exchange liquid temperature F Condition 1 L2 line or below is detected twice Se A Defrosting operation The end temperature is end temperature different from the above each time continuously for 4 minutes when the compressor is 6 5 detection temperature 50 External temperature F operating Condition 2 L1 line or below is detected for a total of 60 minutes when the compressor is operating 3 4 4 Defros
23. after that compressor stopped running 2 Temperature is 176 F or higher when the outdoor unit has been stopped for 60 minutes or longer Details are given in the servicing technical materials 3 A D step is 10 steps or less short circuit Probable cause 1 Sensor malfunction Sensor element malfunction Sensor wiring is partially disconnected resulting in increased electrical resistance yy This alarm does not occur when the wiring is completely cut or when the connector is not connected to the outdoor unit PCB 2 Outdoor unit PCB failure 3 An air short blockage in the area around the outdoor unit has increased the outdoor unit ambient temperature reducing the cooling effects after the compressor stops 4 There is a cause that results in PO3 alarm 5 Electrical noise i Check 1 Sensor malfunction and outdoor unit PCB failure Trouble e Constantly indicates a high temperature e When monitoring software or other means are used for monitoring the discharge temperature at times fluctuates suddenly and wildly In some cases the precise temperature may not be known even when monitoring software is used Check Wiggle the sensor and check whether the trouble continues Check whether the connector is partially disconnected from the PCB yy An F04 alarm will not result if the connector is completely disconnected circuit is open 2 Leakage from the discharge tube check valve Trouble Although the other
24. as described 4 Turn off power to all equipment in the system Then pull out the RC1 connector 4P BLU CNOO06 on the outdoor control PCB in the outdoor unit for which pump down has been completed 5 Turn on power for all equipment in the system and let the outdoor unit run in Cooling mode Because the test run pins on the outdoor control PCB of the unit have been short circuited all units start Cooling mode operation 3 minutes after power ON 6 Using hoses with Schrader type push to release valves connect the manifold gauge valves to the gas line service port and the liquid line service port in the outdoor unit to undergo pump down Fig 2 5 Remaining refrigerant in the system may cause internal pressure Check that each AN valve on the manifold gauge is tightly closed A Schrader type push to release valve is provided for each connection port 7 Use hoses to connect the manifold gauge valves refrigerant recovery unit and refrigerant recovery cylinder Quickly connect each part to prevent air from entering the tubing 8 Recover remaining refrigerant from the inter unit tubing and indoor units e a port using the refrigerant recovery unit Sie connector e O 9 Manifold gauge Lo amp 72 Hi To determine the completion of refrigerant recovery follow the instructions that came with the refrigerant recovery unit T Refrigerant recovery unit Refrigerant recovery cylinder
25. came with the refrigerant recovery unit Low pressure outlet port For 95 16 connector 39 o e O Manifold gauge LoQ GH Connect from here to refrigerant recovery unit Fig 2 14 Mini VRF SYSTEM 8 Compressor Outdoor Unit Repair Procedures 8 1 Compressor Trouble Diagnosis and Check Methods Generally compressor failures can be classified into the following categories 1 Mechanical trouble A Locking intrusion of foreign objects galling etc B Pressure rise failure damaged valve seal bearing or other component C Noise damaged stator rotor valve or other component 2 Electrical trouble gt A Coil burning B Open circuit C Insulation failure D Short circuit Failure diagnosis is based on the following remote controller displays HO1 HO2 HO3 Compressor right side when viewed from front A judgment is made based on factors that include the following coil resistance varies depending on the compressor insulation resistance current leakage breaker operation oil and refrigerant fouling odor pressure and noise Reference Insulation resistance Use a DC 500 V insulation resistance meter and measure the insulation resistance between the electrified and non electrified parts a Motor Min 300 MQ b Compressor Min 100 MQ servicing part c Unit Min 10MQ This is due to the presence of refrigerant which decreases the insulation resistance
26. charged close the lower side valve and draw off any moisture that may have accumulated F Mini VRF SYSTEM 6 Charging Compressor Oil Outdoor Unit Repair Procedures Open to run then close to stop Manifold gauge Upper side valve Close to stop cx esee E Lower side valve Vacuum pump Fig 2 10 3 Charging compressor oil into outdoor unit Connect the lower valve to the low pressure sensor outlet with Schrader type push to release valve in the outdoor unit to be oil charged and then connect the high pressure sensor outlet with push to release valve to the upper valve via the manifold gauge valves at Hi pressure gauge side In addition connect the gas line service port with push to release valve to the DPR Discharge Pressure Regulator Carry out the connection work quickly to avoid letting air enter The hoses may be subject to internal pressure from the refrigerant inside the outdoor unit A Schrader type push to release valve is provided at each connection port Since the DPR valve opens at pressures of 362 6 psi and above be sure to connect the DPR to the gas line service port low pressure side Liquid tube service port For 95 16 connector Gas tube service port eo een For 65 16 connector LH d LA ER Low pressure outlet port For 95 16 connector T
27. compressor capacity 1 Air discharge temperature protection The compressor capacity is limited by using the air discharge temperature of the operating compressor as shown in the tables below Air discharge temperature level Highest level among the air discharge temperature levels of all compressors Air discharge Horsepower hp limits temperature level P hp 221 2 hp down 219 1 hp down 215 0 5 hp down 210 Less than 215 Hp increase prohibited 204 Less than 210 Hp increase permitted slowly Less than 204 No restriction The values shown in the table above are reduced to the values calculated by roadmap control Mini VRF SYSTEM 2 Compressor Control Control Functions 2 Current protection Inverter compressor current control is composed of primary current control and secondary current control Current protection control for the inverter compressor is performed by self protection in the inverter circuit and is not based on a calculated increase decrease in compressor capacity Primary current Secondary current Control Control Compressor 4 5HP 6 HP Secondary current Stop More than 25 0 A More than 29 5 A More than 32 5 A Hz Down 23 5 A Less than 25 0 A 28 0 A Less than 29 5 A 25 0 A Less than 32 5 A Hz Not_up 22 5 A Less than 23 5 A 27 0A Less than 28 0 A 24 0 A Less than 25 0 A Follows normal operation Less than 2
28. may be discharged if the test run continues for a long period of time however this does not indicate a problem In addition the test run is canceled automatically after 1 hour 2 Even within the same area the compressor capacity varies depending on the refrigerant temperature 3 For 6 minutes after the compressors start area C is considered to be area B for control purposes 4 During special control control of the compressor capacity according to Te is not performed 5 If the thermostat turns OFF while Te is within area C the next time the compressor starts it may restart from a lower capacity 6 When the area changes to area C area C is considered to be area B for control purposes for the first 6 min utes even if the horsepower is the minimum value within the range where capacity control is possible opera tion with inverter frequency of 25 Hz only Subsequently if C area continues the thermostat turns OFF Condensation temperature Tc control Thermostat OFF Area D 133 7 F 133 5 F Horsepower decrease Area C 126 6 F 126 5 F Horsepower increase prohibited Area B 124 7 F 124 5 F Horsepower increase permitted Area A Fig 1 2 1 4 Mini VRF SYSTEM 2 Compressor Control Control Functions 2 3 2 Roadmap control in heating mode Roadmap control is performed using the below condensation temperature control Condensation temperature Tc control Thermostat OFF Area D 133 7
29. refrigerant pressure balance is uneven at start when inverter compressor lock occurs there is a missing phase in the inverter compressor wiring or a DCCT failure occurs This can be judged to be starting trouble which is not caused by HIC Check Check the power wiring and connector wiring Correction DCCT failure replace PCB or compressor failure Example Notes Use a tester to measure the voltage between the DCCT output terminal on the rear of the PCB and the ground If the voltage is not within 2 3 V then the DCCT has malfunctioned i Mini VRF SYSTEM 5 Inspection of Parts Outdoor Unit Trouble Diagnosis 1 Electronic control valve MOV1 e MOV1 Measure the voltage between plug pin 5 and pins 1 through 4 at the CN41 connector 6P white on the outdoor unit control PCB Because of the pulse output a simplified measurement method is used Set the tester to the 12 V range if the value displayed is approximately 4 V then the voltage is normal If the voltage is normal measure the resistance between connector pin 5 and pins 1 through 4 Resistance between pin 5 and pins 1 through 4 should be approximately 46 Q for all If the result is OQ or co then replace the coil 2 Crankcase heater e Connect a clamp meter to 1 of the 2 crankcase heater wires and measure the current The current is normal if the result is 0 15 A or higher As a guide the current should be 0 14 A 180 V 0 17
30. state go to the next step If not it stops after LED1 starts blinking and LED2 starts blinking at 0 5 sec intervals 12 Outputs listed below turn ON for 0 5 sec No Contents of output MOV1 A MOV1 B MOV1 A MOV1 B ajA UJN 201201
31. suction temperature sensor TS trouble 10 F16 High pressure sensor trouble 11 F31 Outdoor unit non volatile memory EEPROM trouble 12 HO3 Compressor CT sensor disconnected or short circuit 12 H31 HIC trouble alarm 13 L04 Outdoor unit address duplication 13 LO Indoor unit priority duplication at priority indoor units 14 LOG Indoor unit priority duplication at non priority indoor units and outdoor unit 14 L10 Outdoor unit capacity not set 14 L18 4 way valve operation failure 15 P03 Compressor discharge temperature trouble 15 P16 Inverter compressor overcurrent alarm 16 P22 Fan motor trouble 16 P26 Inverter compressor high frequency overcurrent alarm 16 P29 Inverter compressor missing phase or lock alarm 17 4 Mini VRF Alarm Codes E06 alarm Mini VRF SYSTEM Trouble Diagnosis Alarm code E06 Alarm meaning Outdoor unit failed to receive serial communication signals from indoor unit Alarm conditions No serial communications from indoor unit Probable cause 1 The indoor unit power was cut OFF after initial communications were completed 2 An open circuit or short circuit occurred in the inter unit control wiring after initial communications were completed Check Check the power at the indoor and outdoor units and check the inter unit control wiring Correction Example Notes This alarm is detected after initial communications are completed Therefore it does not occu
32. 2 cooling heating change in 9008 auto heatcool mode 0007 Z 0018 64 F Lower limit at shipment WW 0019 Cen am cu 0029 Lower limit 0030 86 F Upper limit at shipment 0016 60 F Lower limit at shipment m 0017 SCC Sa Be ec 0029 Lower limit lh dia eier 0030 86 F Upper limit at shipment d agnus ei setting range Gg ta Lower limit at shipment Upper limit Drying ca 0029 Lower limit 0030 86 F Upper limit at shipment 0017 62 F Lower limit at shipment 0018 Filter CN70 input switching 0002 Humidifier input Operates linked with drain pump when humidifier is ON indoor unit electronic control valve pa Lo Upper limit Lower limit Auto heat cool A Mini VRF SYSTEM 2 Detailed Settings Function Remote Controller Functions Item code No 1 1l 1 eseription 0000 No forced operation Automatic drain pump 0001 Forced operation for 1 minute Ee Continuous operation 0000 EE EEN 0001 Ventilation fan operated by remote controller Wired remote controller EON Not used Body sensor is used sensor 0001 Remote control sensor is used Operation change 0000 Normal displayed control in progress display 0001 Not displayed OFF reminder function 0000 for when weekly timer is used 0001 Only stop time setting is enabled Discharge temperature Em Discharge temperature control OFF control 0001 Discharge temperature control ON H
33. 2 5 A Less than 27 0 A Less than 24 0 A 2 4 Roadmap Control After Trip When restarting after trip stop occurs the horsepower may increase slowly depending on the trip counter value 1 If trip counter 1 the horsepower increases at a speed that is 1 2 of ordinary roadmap control 2 If trip counter 2 the horsepower increases at a speed that is 1 3 of ordinary roadmap control The trip counter is cleared if no trip occurs within 10 minutes after operation starts p Mini VRF SYSTEM 3 Special Controls Control Functions In addition to ordinary heating and cooling operation this system also includes the following 4 types of special controls for control of the system as a whole 3 1 4 way valve switching control 3 2 Reverse cycle start control 3 3 Inter systems refrigerant oil recovery control 3 4 Reverse cycle defrost control 3 1 4 way Valve Switching Control 4 way valve switching control is performed under the following conditions e The indoor unit operating mode has been switched Cooling mode Heating mode e The power is turned ON and the microcomputer has been initialized e Reverse cycle start control has ended This control is performed in order to ensure reliable switching of the 4 way valve It also performs control to com pensate for tubing heat radiation loss when heating starts after the outdoor unit was stopped for a long time and control for oil recovery 1 Control when the outdoor unit heat exc
34. 3 6 1 Mini VRF SYSTEM 3 Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller B Concerning the 7 segment 4 digit display remote controller timer display The unit Nos of connected units are indicated by four 7 segment digits E HH HH and a colon e ips of unit Nos 1 20 Meaning of display colon Meaning of display colon gt colon HUH H H DD GE n T ON ON e Display of unit Nos 21 40 OFF OFF OFF H A Bal Dal H e e AA la ON ON ON ON e The meaning of the colon changes in the same way to indicate unit Nos up to 80 e Sample displays of the connected indoor unit Nos Display of unit No 1 A A 4A A Display of unit Nos 1 and 2 Lu x Display of unit Nos 1 2 and 3 E lt h AA 4A A Display of unit Nos 1 2 3 and 4 LI E ai The change of the colon display between unit Nos 1 20 to unit Nos 21 40 occurs automatically every 10 seconds However the display does not change if there are no higher number units connected To change the display to the higher number units before 10 seconds have passed press the P GED FLAP button E The total compressor operating time is displayed in 1 hour units using 8 digits When the first 4 digits are displayed the bottom dot of the colon is illuminated Figure A When the last 4 digits are displayed the colon dot is OFF Figure B The display of the first 4 digits and last 4 digits changes autom
35. A 220 V Test Pin When the test pin on the outdoor unit main control PCB is short circuited each part can be operated individually After turning OFF the outdoor unit power short circuit the test pin CN44 white then turn the power back ON The following operations will start after turning ON the outdoor unit power when the test pin CN44 white is short circuited 1 Set DC fan motor at W5 FM1 340 360 rpm FM2 360 380 rpm 2 208 turns ON for 0 5 sec 3 Check Inter unit control wiring circuit If normal state go to the next step If not it stops after LED1 starts blinking at 0 5 sec intervals and LED2 turns off 4 Connector CH1 turns ON for 0 5 sec 5 Do the test to read write EEPROM If normal state go to the next step If not it stops after LED1 starts blinking at 0 5 sec intervals and LED2 lights 6 Connector O2 turns ON for 0 5 sec 7 Check inter outdoor unit control wiring circuit to outdoor unit maintenance remote controller If normal state go to the next step If not it stops after LED turns off and LED2 starts blinking at 0 5 sec intervals 8 LED1 turns ON for 0 5 sec 9 Do the test 1 of circuit for writing micro computing software If normal state go to the next step If not it stops after LED1 starts blinking and LED2 starts blinking at 0 5 sec intervals 10 LED2 turns ON for 0 5 sec 11 Do the test 2 of circuit for writing micro computing software If normal
36. ASHRAE 34 Precautions for Installation Using New Refrigerant 1 Care regarding tubing 1 1 Process tubing e Material Use C1220 phosphorous deoxidized copper specified in JIS H3300 Copper and Copper Alloy Seamless Pipes and Tubes Tubing size Be sure to use the sizes indicated in the table below Use a tube cutter when cutting the tubing and be sure to remove any flash This also applies to distribution joints optional When bending tubing use a bending radius that is 4 times the outer diameter of the tubing or larger Use sufficient care in handling the tubing Seal the tubing ends with caps or tape to prevent dirt moisture or other foreign substances from entering These substances can result in system malfunction Unit in mm Material O Outer diameter 1 4 6 35 3 8 9 52 1 2 12 7 5 8 15 88 3 4 19 05 Copper tube Wall thickness 1 32 0 8 1 32 0 8 1 32 0 8 5 128 1 0 5 128 1 0 1 2 Prevent impurities including water dust and oxide from entering the tubing Impurities can cause R410A refrigerant deterioration and compressor defects Due to the features of the refrigerant and refrigerating machine oil the prevention of water and other impurities becomes more important than ever 2 Be sure to recharge the refrigerant only in liquid form 2 1 Since R410A is a non azeotrope recharging the refrigerant in gas form can lower performance and cause defects of the un
37. EE ERE ERR 1 11 8 Indoor Unit Electronic Control Valve Control 1 12 9 Indoor Special Control n asana des nsa rh a aad 1 13 10 Discharge Gas Temperature cna NR ENN ral a ea 1 14 11 Current Protection Ps 1 14 12 Pressure Sensor Failure crees usu Pesos des eked aaa 1 15 13 4 Way Valve Failure L18 52 5 cmd RR Ee e Ra 1 15 14 Servicing and Maintenance Functions 1 16 OUTDOOR UNIT REPAIR PROCEDURES eee eeeeeee 2 1 Layout Diagram Sensors and Solenoid ValveS o o o o ooooo 2 2 Layout Diagram Sensors d dange eu RR RES ab ai 2 3 le Removing Patel a coxis A a rd 2 4 2 Discharging Oil in COMpreSsor ccxu secs NEE a Ee EE NNN E NR 2 5 3 Recovering Melrigerant escritora 2 6 4 Checking for Leakage After Repair 000000 c eee eee 2 11 5 Evacuating System lt coosccreocinedss RR IRR Re Ee en dox RR dE 2 12 6 Charging Compressor Ol 2c ec aendeedx ex teas ee oe ex xd ERE Sexe 2 13 7 Pumping Out Refrigerant from Outdoor Unit 2 17 o Duces a xS Ee EE d E SOR Ee 2 19 9 High Pressure SOMO 2 5 bc orense a 2 22 OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER 3 1 DESI PPP 3 2 E ln CC 3 3 3 Ordinary Display Controls and Functions coooocccooooooo o 3 4 4 Monitoring Operations ix sua sexe virales sages 3 9 5 Outdoor Unit Alarm History Monitor 3 11 6 Mode Settings gr ne ee erre 3 12 REMOTE CONTROLLER FUNCTIONS ooococcc 4 1 1 Simple
38. F 133 5 F Horsepower decrease Area C 123 9 F 123 8 F Horsepower increase prohibited Area B 120 2 F 120 0 F Horsepower increase permitted Area A Fig 1 3 1 For indoor units that are operating in Heating mode if one unit is selected for a test run the air intake temper ature difference is ignored however Tc control is performed according to Fig 1 3 in order to prevent excessive load This is used for test run checks etc 2 Even within the same area the compressor capacity varies depending on the refrigerant temperature 3 If the condensation temperature Tc enters area D and the thermostat turns OFF the next time the compres sor starts it may restart from a lower capacity 4 When the area changes to area C area C is considered to be area B for control purposes for the first 6 min utes even if the horsepower is the minimum value within the range where capacity control is possible opera tion with inverter frequency of 25 Hz only Subsequently if C area continues the thermostat turns OFF 2 3 3 Protection control Protection control consists of 2 types of protection compressor air discharge temperature protection and current protection The limit values from this protection control are incorporated into the output compressor capacity increase decrease values that were calculated from roadmap control In some cases the control shown below may stop the compressor issue an alarm or reduce the
39. F then the compressor stops If the discharge temperature reaches 222 F 4 times repeatedly after restart an alarm occurs After the compressor stops if the discharge temperature at the stopped compressor is at or above 213 F the compressor start restriction temperature then this compressor does not operate until the temperature drops List of discharge temperature protections Compressor Compressor Compressor abe hi e Stop temperature F start restriction Alarm display B temperature F Compressor 1 Inverter 222 213 P0O3 10 2 Control For Detection of Discharge Sensor Failures f the temperature is at or above sensor failure temperature 176 F value in parentheses 60 minutes after the compressor stopped an alarm occurs e f the discharge gas temperature remains at or above sensor failure temperature 213 F for 20 minutes after the system is stopped an alarm occurs n this case in addition to sensor failure compressor overheating caused by insufficient refrigerant is also a possibility List of discharge sensor failures Compressor Compressor Alarm display model type Compressor 1 Inverter F04 11 Current Protection 11 1 Fan Motor Alarm Description Occurs when the fan motor detects overcurrent or when the P22 fan motor is locked and does not turn 1 14 11 Current Protection 12 Pressure Sensor Failure Mini VRF SYSTEM 13 4 Way Valve Fa
40. Panasonic SERVICE MANUAL 410 MINI VRF SYSTEM Fo Model No Outdoor Units Class 36 52 U 36LE1U6 U 52LE1U6 Model Name U 36LE1U6E U 52LE1U6E Refrigerant R410A is used in the outdoor units Salt Air Damage Resistant Specifications Indoor Units Class 7 9 12 15 18 19 24 36 48 54 U1 4 Way Cassette S 12MU1U6 S 18MU1U6 S 24MU1U6 S 36MU1U6 Y1 4 Way Cassette 60x60 S 12MY1U6 S 18MY1U6 D1 1 Way Cassette S 07MD1U6 S 09MD1U6 S 12MD1U6 F1 Low Silhouette Ducted S 07MF1U6 S 09MF1U6 S 12MF1U6 S 15MF1U6 S 18MF1U6 S 24MF1U6 S 36MF1U6 S 48MF1U6 S 54MF1U6 M1 Slim Low Static Ducted S 07MM1U6 S 09MM1U6 S 12MM1U6 S 15MM1U6 S 18MM1U6 High Static Pressure Et lbuctod S 36ME1U6 S 48ME1U6 T1 Ceiling S 12MT1U6 S 18MT1U6 S 24MT1U6 K1 Wall Mounted S 07MK1U6 S 09MK1U6 S 12MK1U6 S 18MK1U6 S 19MS1U6 S 24MK1U6 P1 Floor Standing S 07MP1U6 S 09MP1U6 S 12MP1U6 S 15MP1U6 S 18MP1U6 S 24MP1U6 a recado S 07MR1U6 S 09MR1U6 S 12MR1U6 S 15MR1U6 S 18MR1U6 S 24MR1U6 Standing Necessary to install the External Electronic Expansion Valve Kit Optional CZ P56SVK1U 85464849297000 REFERENCE NO SM830197 00 IMPORTANT Please Read Before Starting This air conditioning system meets strict safety and oper ating standards As the installer or service person it is an important part of your job to install or servic
41. RF B About the outdoor unit maintenance remote controller The outdoor unit utilizes nonvolatile memory EEPROM on its PCB This allows EEPROM data to replace the setting switches that were present on previous PCBs The outdoor unit maintenance remote controller is used to set and change these EEPROM data In addition to setting and checking the outdoor unit EEPROM data this remote controller can also be used to monitor the outdoor unit alarm history monitor the various indoor and outdoor temperatures and check the indoor unit connection status number of units operating mode etc Mini VRF SYSTEM Outdoor Unit Maintenance Remote Controller Service Checker Section Outdoor unit maintenance remote controller does not function as an ordinary remote controller It is therefore only used for test runs and CZ RTC2 during servicing PAPANE Ge Outdoor unit maintenance System diagram i remote controller i Special service checker wiring Servicing No CV6231785082 Outdoor unit Inter unit control wiring H Outdoor unit control PCB Remote Remote controller controller The special service checker wiring is required in order to connect the outdoor unit maintenance remote controller to the outdoor unit PCB e Ordinary remote controllers or other controller are still required for the indoor units even when the outdoor u
42. Remaining oil in the removed compressor 0 55 gal Additional oil to be charged 0 55 gal remaining oil 0 50 gal rated oil amount 0 05 gal f the result is a negative amount remaining oil is less than the rated amount it is not necessary to discharge the extra oil from the system For the method used for additional oil charging after compressor replacement refer to 6 1 If Refrigerant Has Already Been Charged to Outdoor Unit Mini VRF SYSTEM 7 Pumping Out Refrigerant from Outdoor Unit Outdoor Unit Repair Procedures Required equipment and tools Jumper wire with clips adjustable wrench set of manifold gauge valves vacuum pump refrigerant recovery unit pre purged refrigerant cylinder for recovery and hex wrench 4 mm for liquid tube and 5 mm for gas tube This procedure is used to move refrigerant of the faulty outdoor unit except compressor into indoor units and refrigerant tubing 1 Connect the manifold gauge valves at the Lo side to the low pressure sensor outlet of the outdoor unit to be repaired Also connect the refrigerant recovery cylinder to any one of the normal outdoor units at the liquid line service port Schrader type with push to release valve Perform the connection work quickly so that no air is allowed to enter Connecting the refrigerant recovery cylinder is done to prevent pressure from rising excessively during the backup operation by recovering the refrigerant from the outdoor unit to be
43. Settings FUNCION 2 99 e xS rociar 4 2 2 Detailed Settings Function essan EE DE REGSG RARE Y E 4 4 3 Remote Controller Servicing Funchons sssaaa ss aaas s ne 4 15 TROUBLE DIAGNOSIS CSN a RC RK 5 1 1 Contents of Remote Controller Switch Alarm Display 5 2 2 Outdoor Unit Control Panel LED Display o 5 4 3 Remote Controller Servicing Funchons sasssa aaaeeeaa 5 5 4 Mini VRF Alarm Codes 00 00 ee 5 6 5 Inspection of Parts Outdoor Unit n oso oer 5 18 Mini VRF SYSTEM Contents Control Functions 1 CONTROL FUNCTIONS TINWOOUCUON 2055 a is a rr a a e enue 1 2 2 Compressor Control ci A AA eee eeu as 1 3 3 Special Controls i i056 eke a so okie Rn ha RR NR et a oa ee ee lel Se 1 7 4 Other Control e E gie sees EE Ee a AA ces Keowee AAA A ewes 1 10 5 Operation of Solenoid Valves eee 1 10 6 Outdoor Unit Electronic Control Valve Motor Valve Control MOV1 1 10 7 Outdoor Fan Control 0 0c cee eee 1 11 8 Indoor Unit Electronic Control Valve Control oooooooooooommooooo 1 12 9 Indoor Special CONTO 00 ceria dene BIREN ons SUR eee Re Ge kr eee BR 1 13 10 Discharge Gas Temperature 1 14 11 Current Protection 26605660 s UNENEE NENNEN NU NNN Bue e NN weer ene e ee E 1 14 12 Pressure Sensor Failure eg ods io a tes eege oo aan 1 15 13 4 Way Valve Failure L18 Nee soluce rr Rr Enn 1 15 14 Servicing and M
44. TROUBLE DIAGNOSIS 1 Contents of Remote Controller Switch Alarm Display 5 2 2 Outdoor Unit Control Panel LED Display 5 4 3 Remote Controller Servicing Functions 0200 eee eee eee eee 5 5 4 Mini VRF Alarm Codes ECKE o erac I e a AAA ews 5 6 5 Inspection of Parts Outdoor Unit 5 18 1 Contents of Remote Controller Switch Alarm Display Mini VRF SYSTEM Trouble Diagnosis ON O Blinking Yt OFF Wired Wireless remote remote controller control receiver display display Possible cause of malfunction EN Pp 4 i zg 15 o E 08 Serial Remote controller is Error in receiving serial communication signal communication detecting error signal from Signal from main indoor unit in case of group control E01 indoor unit Ex Auto address is not completed i errors p Ze e Mis setting Error in transmitting serial communication signal E02 Indoor unit is detecting error signal from remote controller and system controller lt lt E03 gt gt Indoor unit is detecting error Error in receiving serial communication signal l f signal from outdoor unit When turning on the power supply the number of connected E04 indoor units does not correspond to the number set Except R C i address is 0 e X Error of the outdoor unit in receiving serial communicat
45. a tion with the indoor units in that system is possible Both ON amp O After power is turned ON and automatic address setting is not in progress 1 or more indoor units are confirmed in that system however the number of indoor units does not match the number that was set OFF ON o e Automatic address setting was completed successfully After the power is turned ON the A nl number of detected indoor units connected to that system matches the number that was set Both OFF and regular communications are occurring Automatic address setting is in progress Blinking alternately Yt xt At time of automatic address setting the number of indoor units did not match the number that was set Both blinking xt xt Alarm display EE LED 4 blinks M times then LEDS blinks N times The cycle than repeats M 2 Palarm 3 Halarm 4 Ealarm 5 Falarm 6 L alarm N Alarm No Example LED 1 blinks 2 times then LED 2 blinks 17 times The cycle then repeats Alarm is P17 G Mini VRF SYSTEM 3 Remote Controller Servicing Functions Trouble Diagnosis Sensor temperature display function displayed regardless of whether unit is operating or stopped e Use the following check procedure to display the sensor temperatures from the remote controller indoor unit and outdoor unit sensors on the remote controller display lt Check procedure gt 1 Press and hold the ES
46. address Sensor type pIE E Indoor unit heat exchanger LILI Room temperature 1 UE temperature E3 9 D Remote controller D5 Discharge temperature temperature e sensor Indoor unit 1127 Indoor unit intake SR uc temperature Li i 03 Indoor unit heat exchanger Da Indoor unit electronic 3 temperature E1 LI expansion valve position Y IW 09 GA Discharge temperature 1 Ig 717 High pressure sensor F UL temperature 3 CT Inverter primary current Outdoor unit ri j E Lid Suction temperature TS MOV1 pulse DE Outdoor unit heat exchanger r C E L temperature C1 Li H H Outside air temperature i g Actual operating Frequency 1 Main unit only in case of group control 4 Mini VRF Alarm Codes Alarms for outdoor units Mini VRF SYSTEM Trouble Diagnosis Alarm Code Alarm Meaning Page E06 Outdoor unit failed to receive serial communication signals from indoor unit 7 E12 Automatic address setting start is prohibited 7 E15 Automatic address setting alarm too few units 7 E16 Automatic address setting alarm too many units 8 E20 No indoor units at automatic address setting 8 E25 Outdoor unit address setting failure duplication 8 F04 Compressor discharge temperature sensor TD trouble 9 F07 Liquid temperature sensor trouble at outdoor heat exchanger C1 10 F08 Outdoor air temperature sensor TO trouble 10 F12 Compressor
47. aintenance Functions 000 cee e eee eee eee 1 16 1 Introduction OUTDOOR UNIT Mini VRF SYSTEM Control Functions Mini VRF is a multi system that is connected to a single outdoor unit The outdoor unit contains an inverter com pressor To operate this system the below settings must be made at the time of the test run Table 1 1 Setting item At shipment Settable range from factory System address 1 System 1 30 No of indoor units 1 1 15 units Up to a maximum of 15 indoor units can be set however the maximum number of units which can be connected is shown below for each outdoor unit capacity Table 1 2 4HP 5HP 6HP Maximum number of connected indoor units 6 8 9 Be sure to connect indoor units so that the resulting indoor outdoor capacity ratio total capacity of all indoor units compared with the outdoor unit capacity is within the range of 5096 13096 Mini VRF SYSTEM 2 Compressor Control Control Functions 2 1 Compressors Mounted on Outdoor Units Capacity Type 4HP 5HP 6HP Compressors mounted Rotary DC Inverter 2 2 Compressor Stop Rules After a compressor stops it will not start again for a period of 3 minutes 3 minutes forced OFF However this does not apply to the Special Control described later when operation of the compressor is forcibly stopped as part of a control operation 2 3 Roadmap
48. an mode Max fan mode Coolinaroberation Outdoor air temp gt 86 F 3 a ane Outdoor air temp lt 86 F 1 Heating operation 21 4 7 2 Fixed Initial Fan Mode For the first 30 seconds after operation starts the mode is fixed at the initial mode that was calculated based on the relationship between the outdoor air temperature and the outdoor unit horsepower If the outdoor unit horsepower changes dramatically the initial mode may be recalculated and may be again fixed for 30 seconds 7 3 Operation after initial fan mode is fixed After the fixed initial fan mode the fan mode is increased or decreased according to the operating conditions 1 Indoor cooling operation a The fan mode is increased when the pressure sensor temperature is high and is decreased when the pressure sensor temperature is low The fan mode is always increased when the pressure sensor temperature is 122 F or higher b The fan mode may be decreased when symptoms of insufficient gas are detected at an indoor unit 2 Indoor heating operation a If the condensation temperature is low the fan mode is increased at regular intervals b If the condensation temperature is high the fan mode is decreased in order to prevent excessive load c The fan mode may be increased when the outdoor liquid temperature drops to 44 F or below 7 4 When Compressor Magnet Switch Seizing Alarm Occurs Because the high pressure may increase operat
49. ant recovery procedures B for indoor unit with no ball valve Refrigerant in all indoor units and the refrigerant tubing circuit must be pumped into the outdoor unit referred to as pump down The maximum refrigerant storage capacity per a single outdoor unit is approx 123 oz Thus in order to collect all refrigerant from the system a separate refrigerant recovery unit is necessary Follow these procedures to correctly perform pump down 1 Using hoses connect the manifold gauge valves to both the high pressure and low pressure outlet ports of the outdoor unit to be pumped down Quickly connect each part to prevent air from entering the tubing 2 After running the unit in Cooling mode for about 5 minutes fully close the liquid line valve of the outdoor unit to be pumped down 3 When the high pressure gauge reading shows 478 6 psi or more or the low pressure gauge reading falls to 72 5 psi or less pull out the EXL2 connector 3P YEL CNO37 on the control PCB of the outdoor unit then immediately close the gas line service valve As soon as the EXL2 connector is pulled out F24 alarm abnormal sensor immediately turns on and the outdoor unit stops When pulling out the EXL2 connector be sure to grasp the connector securely Ara with your fingers and never pull it directly by its wires When any other connector except the EXL2 is disconnected the outdoor unit will not stop Be sure to pull out only the EXL2 connector
50. apacity Reverse cycle defrost control Heating Thermostat ON Fixed pulses corresponding to the indoor unit capacity Heating Fixed pulses corresponding to the indoor Thermostat OFF unit capacity 9 Indoor Special Control 9 1 Indoor Unit Thermostat ON OFF Delay Timer 1 When an indoor unit thermostat turns ON the thermostat cannot be turned OFF by the room temperature thermostat discharge temperature thermostat for 3 minutes However if the condensation temperature refrigerant temperature detected at the condenser reaches PX temperature or higher the thermostat may turn OFF in order to prevent excessive loads 2 When an indoor unit thermostat turns OFF it will not turn ON again for a minimum of 3 minutes 9 2 Indoor Unit Refrigerant Oil Self recovery Control This control is performed constantly during Cooling mode operation only 1 The electronic control valve at indoor units that are stopped or are in Fan mode or in Cooling mode with ther mostat OFF opens for 1 2 minutes 2 At indoor units that are in Cooling mode with thermostat ON the electronic control valve opens from its current position by approximately 20 pulses 1 18 10 Discharge Gas Temperature 11 Current Protection 10 1 Discharge Gas Temperature Protection Alarm Mini VRF SYSTEM Control Functions The compressor upper limit discharge temperature is 222 F If the discharge temperature reaches 222
51. arging When valve leakage or over charging occurs refrigerant is likely to accumulate in the outdoor units or indoor units resulting in a sudden rise in pressure at start that occurs before the refrigerant in the heat exchanger is discharged The representative valve to check is a mechanical valve 3 Outdoor unit PCB failure The check items are the same as for a high pressure sensor malfunction A normal PCB is needed to determine whether the problem is a PCB failure or a pressure sensor malfunction If an abnormality was found at the check items for a high pressure sensor malfunction first try replacing the PCB and check again Trouble is corrected Outdoor unit PCB failure Trouble is not corrected High pressure sensor malfunction Correction 1 Replace the high pressure sensor Caution Because the high pressure sensor connection incorporates a Schrader type valve it can be removed and replaced However the high pressure sensor can be easily damaged by high voltage therefore use sufficient caution with regard to static electricity 2 Replace the PCB 3 Correct the locations of problems in the refrigeration cycle Correct locations where clogging or leakage has occurred n the case of over charging recover refrigerant Adjust the amount of refrigerant Example This alarm may result when the service valve is closed or when valve leakage particularly from the mechanical valve occurs 4 Mini VRF
52. atically after 10 seconds The display can also be changed by pressing the ENS FLAP button With the outdoor unit maintenance remote controller when connected to the outdoor unit the unit remote controller check functions will not operate 10 Compressor total operating time A and B are displayed alternately The example here 0000 0062 indicates 62 hours 4 Monitoring Operations Display the indoor unit and outdoor unit sensor temperatures Operating procedure O e Press and hold the CHECK button and buttons simultaneously for 4 seconds or longer to engage temperature monitor mode During temperature monitoring 4 displays The display and operations are the same as for monitor mode using the indoor unit remote controller Press the UNIT button and select the indoor unit to monitor Press the temperature setting C az and yo buttons and select the item code of the temperature to monitor The unit No of the selected indoor unit and the temperature data are displayed To end monitoring press the CHECK button The display returns to the normal display KIC The display does not blink Mini VRF SYSTEM Outdoor Unit Maintenance Remote Controller d em Tasti S Mini VRF SYSTEM 4 Monitorin
53. c heating cooling Operation This setting allows a heat pump indoor unit to be operated as a cooling only unit Mini VRF SYSTEM 2 Detailed Settings Function Remote Controller Functions enzel m Boegen m wwe Set when the indoor unit EEPROM memory is replaced during servicing d Indoor unit capacity System outdoor unit address These are not set at the time of shipping from the factory Indoor unit address These must be set after installation if automatic address setting is not performed Group address Shifts the intake temperature during cooling and dry operation Automatic stop time after The time at which an indoor unit is automatically stopped after operation starts operation start can be set in increments of 5 minutes Auto heat cool selects the operating mode automatically based on the Temperature shift for difference between the room temperature and the temperature set on the cooling heating change in remote controller This setting establishes a shift temperature for the heating auto heat cool mode cooling temperature setting relative to the remote controller temperature setting SCH intake temperature Enabled only when the body thermostat is used Increase this value when it is difficult to turn the thermostat ON Cooling temperature setting 4 Shift temperature Remote controller temperature setting Shift temperature a Heating tem
54. charge caused by For low Antibacterial high performance filter 6596 filter installation static pressure filter Air cleaning unit air cleaning unit optical regenerative deodorizing filter deodorant activated charcoal filter For air blocking e material For 3 way discharge when discharge duct is connected Gone VT air blocking For 2 way discharge material 0000 No humidifier output 0001 Humidifier ON time 9002 ON time per 60 SERES 0058 0059 0060 Continuously ON gt E 0000 Function disabled SES 0001 Function enabled En Timer function change 0000 Function disabled LI prohibit 0001 Function enabled Ge Smudging control 0000 No smudging control i Mini VRF SYSTEM 2 Detailed Settings Function Remote Controller Functions Simple setting items Filter sign ON time setting Changes the indoor unit filter lifetime when a high performance filter or other filter lifetime optional product is installed Degree of filter foulin Reduces the filter sign ON time to 1 2 of the standard time setting at the time of 9 9 shipping for cases when filter fouling is more severe than normal Filter sign ON times for each model Filter sign ON time S per High High Standard Long life P performance performance Model e Js zr Pressure data differential g switch 0000 1 Way Cassette D1 B 4 Way Cassette U1 Y1 Low Silhouette Ducted F1 Slim Low Static Ducted M1 High Static
55. check that no metal scraps or bits of wiring have been left inside the unit being serviced N WARNING Do not clean inside the indoor and outdoor units by users Engage authorized dealer or specialist for cleaning In case of malfunction of this appliance do not repair by yourself Contact to the sales dealer or service dealer for a repair Check of Density Limit The room in which the air conditioner is to be installed requires a design that in the event of refrig erant gas leaking out its density will not exceed a set limit The refrigerant R410A which is used in the air condition er is safe without the toxicity or combustibility of ammonia and is not restricted by laws imposed to protect the ozone layer However since it contains more than air it poses the risk of suffocation if its density should rise excessively Suf focation from leakage of refrigerant is almost non existent With the recent increase in the number of high density buildings however the installation of multi air conditioner systems is on the increase because of the need for effec tive use of floor space individual control energy conserva tion by curtailing heat and carrying power etc Most importantly the multi air conditioner system is able to replenish a large amount of refrigerant compared to conventional individual air conditioners If a single unit of the multi air conditioner system is to be installed in a small room select a sui
56. compressor is operating and this compressor is stopped the discharge temperature of this compressor rises together with the temperature of the other compressor 3 If the cause is still unknown after checking the above then it is possible that electrical noise is the cause of the trouble It is necessary to provide a line filter or carry out other noise countermeasures Correction 1 Replace the sensor 2 Carry out noise countermeasures 3 Adjust the amount of refrigerant 4 Correct the trouble Example 1 Sensor wiring is partially cut Notes This alarm does not indicate that the sensor is disconnected In order to prevent overheating during operation the outdoor units in this system will not allow a compressor to start if the discharge temperature does not decrease while the compressor is stopped If a sensor malfunction results in continuous detection of a high discharge temperature then the compressor may stop for no apparent reason The purpose of this alarm is to facilitate identification of the problem in this case 4 Mini VRF Alarm Codes F07 alarm Mini VRF SYSTEM Trouble Diagnosis Alarm code F07 Alarm meaning Liquid temperature sensor C1 trouble at outdoor heat exchanger Alarm conditions 1 A D step is 10 steps or less short circuit 2 A D step is 1014 steps or more open circuit Probable cause 1 Sensor malfunction including connector 2
57. de 04 is incorrect Example Notes This alarm is displayed at the indoor units that are set for priority Alarm LO6 is displayed at the indoor units that are not set for priority L06 alarm Alarm code L06 Alarm meaning Indoor unit priority duplication at non priority indoor units and outdoor unit Alarm conditions More than 1 indoor unit set for priority was detected in the system Probable cause More than 1 indoor unit is set for priority in the system Check Find the indoor units where alarm LO5 has occurred in the system Correction Refer to the alarm LO5 correction Example Notes Alarm LO6 occurs as a result of alarm L05 When the duplicated priority settings are corrected alarm LO6 is also corrected L10 alarm Alarm code L10 Alarm meaning Outdoor unit capacity not set Alarm conditions The outdoor unit capacity has not been set or the setting is not allowed by the system Probable cause This alarm occurs because the capacity has not been set Check Connect the outdoor unit maintenance remote controller On the outdoor unit EEPROM detailed setting mode screen check the value for the outdoor unit capacity item code 81 Check that it is not set to 0 or to a capacity that is not allowed Correction If item code 81 is incorrect use the outdoor unit maintenance remote controller and set it correctly After changing the setting be sure to res
58. der the device purpose and type when changing the settings Incorrect settings may result in malfunction Do not change any setting data that does not appear in this list Mini VRF SYSTEM 2 Detailed Settings Function Remote Controller Functions This allows the system address indoor unit address and other settings to be made for the individual or group control indoor unit to which the remote controller used for detailed settings is connected When detailed settings mode is engaged operation stops at the individual or group control indoor unit where the remote controller used for detailed settings is connected Simple settings items can also be set at this time Procedure D Press and hold the 4 GET and ES buttons simultaneously for 4 seconds or longer O gg unit No or Fil L in the case of group control item oe 471 y and settings data HB XX are displayed blinking on the remote controller LCD display Fig 4 2 At this time the indoor unit fan or all indoor unit fans in the case of group control begins operating 3 If group control is in effect press the button and select the address unit No of the Fig 4 2 indoor unit to set At this time the fan at the indoor unit begins operating Press the temperature setting amp w buttons to select the item code to change Press the timer time 2
59. e designated amount of refrigerant Ara When charging with liquid refrigerant add refrigerant a little at a time in order to prevent liquid back flow 6 Follow the instructions in 6 Charging Compressor Oil and charge with the necessary amount of oil 7 Remove the manifold gauge Mini VRF SYSTEM 8 Compressor Outdoor Unit Repair Procedures Ar The connecting port includes a Schrader type push to release valve When disconnecting the hose pressure will be applied from the refrigerant in the outdoor unit 8 Follow the instructions in 8 3 Dry Core Cleaning and perform dry core cleaning of the outdoor unit that failed 8 3 Dry Core Cleaning If burning or other failures occur repeatedly at compressor in many cases the cause is acid sludge carbon or other substances that remain in the refrigeration cycle as the result of insufficient cleaning If when the oil is inspected there is an outdoor unit where the oil color phase is 4 0 or higher or where a sharp odor is present carry out all steps below to perform dry core cleaning The operating pressure is approximately 1 5 times higher than with R22 or R407C Therefore use R410A dry cores 1 Refer to Refrigerant recovery procedures B for indoor unit with no ball valve under 3 2 Refrigerant Recovery Procedures Indoor Unit Perform pump down of the refrigerant from all indoor units and inter unit tubing to the outdoor unit side 2 Cutth
60. e liquid tube at all outdoor units where dry cores will be attached then attach the dry cores and ball valves as shown in Fig 2 15 3 Operate outdoor unit in either Heating or Cooling mode 4 Fully close the liquid tube valve and ball valve at the outdoor unit where dry cores will be attached 5 Stop operation of outdoor unit 6 Connect a refrigerant recovery device to the liquid tube service port Schrader type valve on the outdoor unit where dry cores will be attached Recover the refrigerant that is in the tubing At this time be careful that air does not enter the tubing The connecting port includes a Schrader type push to release valve When connecting the hose internal pressure will be applied from the remaining Ar refrigerant in the inter unit tubing To determine when refrigerant recovery has been completed follow the instructions that came with the refrigerant recovery device 7 As shown in Fig 2 15 disconnect the tube that runs from the liquid tube valve to the ball valve on the outdoor unit where dry cores will be attached Then attach the dry cores 8 At all outdoor units where dry cores are attached pressurize with 362 6 psi of nitrogen from the liquid tube service port and check for leaks 9 After draining all nitrogen from the tubing apply vacuum from the liquid tube service port to the outdoor unit where dry cores are attached until the pressure is 14 7 psig 5 Torr or less 10 Fully open t
61. e refrigerant system to TP Serve as a safety bypass circuit for ga refrigerant connect it to the gas mm e Nipple line service port carefully to avoid releasing refrigerant into the atmosphere Receiver tank CV6380152988 Perform oil charging AN sm work carefully so that no liquid refrigerant enters the charging tank 1 Evacuation drying in oil charging tank With the bottom side valve fully closed open the upper side valve and connect it to the vacuum pump via the manifold gauge valves as shown below Run the vacuum pump and evacuate the tank until the pressure falls to below 14 7 psig 5 Torr for the evacuation drying After the evacuation drying is finished fully close the upper valve Next fully close the manifold gauge valves and stop the vacuum pump To ensure proper evacuation refer to the operating instructions that came with AN the vacuum pump Manifold gauge Upper side valve Open to run then close to stop Lower side valve Vacuum pump Fig 2 9 2 Charging compressor oil into oil charging tank Connect a piece of pipe to the lower valve and then insert the other end deeply into the bottom of the oil container Make sure you avoid letting any air be sucked into the tube Next run the vacuum pump and open the manifold gauge valves open the upper and lower valves to begin charging oil into the charging tank After the tank is
62. e same refrigerant system it is possible to set one remote controller as the priority remote controller the remote controller which is given priority for selecting the operating mode If 2 or more remote controllers are set as priority remote controllers an alarm will occur at the remote controllers and operation will not be possible When the priority remote controller is set to the operating mode for control then all other remote controllers can select only the permitted operating mode regardless of whether the priority remote controller is operating or stopped When a controlled remote controller is operated Operation change control in progress is displayed Set mode at priority remote controller Modes that can be selected at other remote controllers Cooling or dry Cooling dry fan Heating fan Fan Whichever mode heating cooling is selected first There are other methods to avoid control in which the mode selected first takes priority Methods of remotely controlling the operating mode 1 Use the central functions of a central control device 2 Use a remote control relay PCB at the outdoor unit 2 Detailed Settings Function Mini VRF SYSTEM Remote Controller Functions When the operating mode at the priority remote controller is changed the operating modes of other remote controllers change as shown below Mode change at priority remote controller Operating modes at other remote controllers Cooli
63. e the system so it operates safely and efficiently For safe installation and trouble free operation you must Carefully read this instruction booklet before beginning O Follow each installation or repair step exactly as shown Observe all local state and national electrical codes Pay close attention to all warning and caution notices given in this manual N WARNING AN If Necessary Get Help These instructions are all you need for most installation sites and maintenance conditions If you require help for a special problem contact our sales service outlet or your certified dealer for additional instructions This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage In Case of Improper Installation The manufacturer shall in no way be responsible for improper installation or maintenance service including fail ure to follow the instructions in this document SPECIAL PRECAUTIONS When Wiring ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH ONLY A QUALIFIED EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked Highly dangerous electrical voltages are used in this system Carefully refer to the wiring diagram and these
64. eat exchanger 0013 Control temperature 55 F temperature for cold air A a EMEN 57 F discharge Heat exchanger EA point for control to ES Ke temperature 77 F prevent cold air 0026 Control temperature 78 F Fan o tp t switchin Ge Output linked with fan ON when indoor unit fan is operating P 9 0001 Fan mode operation output start time 0059 59 sec delayed start 0060 60 sec delayed start Humidifier output OFF Drain pump stopped Humidifier output ON Drain pump operates Humidifier setting 0002 oi output ON Drain pump operates for 1 minute when total humidifier operating time reaches 60 minutes 0003 Humidifier output ON Drain pump stopped Flap operation mode 2000 Standard setting p op 0001 Draft reduction mode Flap lower limit position is shifted upwards 0000 Smudging reduction mode Flap swing upper limit position is shifted downwards Flap swing mode 0001 Normal mode 0002 Draft reduction mode Flap swing lower limit position is upwards A Mini VRF SYSTEM 2 Detailed Settings Function Remote Controller Functions Setting data Item code P Description No BN REC mode High ceiling use High ceiling setting 1 with standard panel For low Ultra long life filter oil guard panel ammonia deodorizing Fan tap setting static pressure filter filter optical regenerative deodorizing filter Fan tap change in order to prevent drop in air Antibacterial high performance filter 9096 dis
65. elapsed defrost end judgment 4 Other Control 5 Operation of Solenoid Valves Mini VRF SYSTEM 6 Outdoor Unit Electronic Control Valve Motor Valve Control MOV1 Control Functions 4 Other Control 4 1 Indoor Unit Self Separator Oil Recovery Control Refer to the indoor unit special control item 5 Operation of Solenoid Valves 5 1 4 way Valve Control 1 OFF conditions At Cooling mode Special control reverse cycle start control inter systems refrigerant oil recovery control reverse cycle defrost control is in effect 2 ON conditions At Heating mode 6 Outdoor Unit Electronic Control Valve Motor Valve Control MOV1 6 1 Power Initialization The valve position is 480 pulses if the indoor unit has not started once after the power was turned ON Operation of the electronic control valve during normal unit operation Indoor Unit Heat exchanger status MOV1 Remarks Cooling Condenser 480 Maximum flow control operation Stop 480 7 Heating Evaporator 65 Less than 480 SH super heat control operation Stop 0 SH control controls the difference between outdoor heat exchanger liquid temperature and suction temperature to 2 10 F Mini VRF SYSTEM 7 Outdoor Fan Control Control Functions 7 1 Outdoor Fan Min Fan Mode and Max Fan Mode These outdoor units utilize a DC fan motor that can be controlled using a maximum of 15 increments 15 fan modes Outdoor unit Min f
66. en gas remaining in the refrigerant circuit and causing operating problems Therefore never skip this step 6 Run the vacuum pump and continue evacuation until the vacuum condition falls to less than 14 7 psig 5 Torr To ensure proper evacuation refer to the operating instructions that came B with the vacuum pump Low pressure outlet port For 95 16 connector Ne e H Manifold auge Z s Lim Vacuum pump High pressure outlet port For 45 16 connector Y m d Fig 2 7 5 2 Evacuating Refrigerant Tubing Between Indoor and Outdoor Units Refer to the Installation Instructions that came with the outdoor unit Mini VRF SYSTEM 6 Charging Compressor Oil Outdoor Unit Repair Procedures 6 1 If Refrigerant Has Already Been Charged to Outdoor Unit Be sure to use an exclusive oil charging tank for charging compressor oil Prior to charging carry out vacuum of the tank and take care that no air in the form of bubbles is permitted to enter the tank The oil charging procedures are given below The receiver tank used for maintenance may be used as an exclusive oil charging tank When installing the oil charging DPR CV6230817937 tank to th
67. er or for fire prevention input It is possible to install a total heat exchanger and ventilation fan in the system which can be started and stopped by the wired remote controller The ventilation fan can operate linked with the start and stop of the indoor unit or can be operated even when the indoor unit is stopped Use a ventilation fan that can accept the no voltage A contact as the external input signal In the case of group control the fans are operated together They cannot be operated individually Ventilation fan operation from remote controller This setting is used to switch from the body sensor to the remote controller sensor Check that remote controller sensor is displayed Do not use this setting with models that do not include a remote controller sensor Do not use this setting if both the body sensor and remote sensor are used Switching to remote controller sensor In a MULTI system with multiple remote controllers switching between heating and cooling is restricted and Operation change control in progress is displayed This setting is used to prevent this display from appearing Refer to the item concerned with operating mode priorities ON OFF of Operation change control in progress display This setting switches the operation when the weekly timer is connected to the remote controller This can be used to prevent cases in which the unit is accidentally left ON There is no change whe
68. et both the indoor and outdoor power Example Notes The outdoor unit maintenance remote controller is required in order to set the capacity in the outdoor unit EEPROM 4 Mini VRF Alarm Codes L18 alarm Mini VRF SYSTEM Trouble Diagnosis Alarm code L18 Alarm meaning 4 way valve operation failure Alarm conditions During heating when 2 minutes and 30 seconds have elapsed after compressor operation started the temperature difference between the outdoor air temperature sensor and the heat exchanger liquid temperature sensor C1 is 40 F or higher Probable cause 1 The 4 way valve connector 20S CN005 has become disconnected from the control PCB 2 The 4 way valve circuit is locked malfunctioning Check 1 Check the 4 way valve connector 205 CNO005 2 If the connector is normal check the 4 way valve wiring and the PCB circuit Correction If the connector is normal correct or replace the problem locations Example Notes P03 alarm Alarm code P03 Alarm meaning Compressor discharge temperature trouble Alarm conditions Inverter compressor Temperature is 222 F or higher and pre trip stop has occurred Probable cause 1 Insufficient amount of refrigerant including trouble resulting from an insufficient initial charge and from gas leakage Blocking of low pressure parts caused by intrusion of foreign objects moisture scale etc 2 E
69. g Operations Outdoor Unit Maintenance Remote Controller B Display of unit No 1 a fa Sa Oa oy Oa oa 4 Eire are am enr ua HH Indoor unit electronic control valve position STEP Li Discharge temp 1 ae High pressure sensor temp T lid Heat exchanger gas 1 Es rm i E ci il gt AE Not used Inverter primary current d wxue ges houal operata eguer r AAA 5 me aa menea a Se oe a EJ E A y an an Se aa 2a 1 pu m D NOTE OA and subsequent items are outdoor unit data 5 Outdoor Unit Alarm History Monitor Displays outdoor unit alarms only Check the indoor unit alarm histories separately using the indoor unit remote controllers or other control device Operating procedure O O Press and hold the CHECK button and button simultaneously for 4 seconds or longer to engage outdoor unit alarm history mode During temperature monitoring displays The display and operations are the same as for the alarm history monitor performed from the indoor unit remote controller However the unit No display shows the outdoor unit address Press the temperature setting TA and Cv buttons and select the item code for the alarm history The select outdoor unit address the item code and the alarm history alarm data are displayed The outdoor unit address is displayed as R C XX YY System XX Outdoor unit sys
70. g operation for all units 1 Short circuit the TEST pin CN44 on the outdoor control PCB 2 Let the unit operate for a while then check if it is running in Cooling mode or Heating mode by touching the gas line with your finger If it is running in Heating mode follow the instructions given in 3 through 5 Cooling mode low temperature lower than 68 F Heating mode high temperature higher than 140 F Be careful when touching the gas line since the tubing may be very hot about 140 F during Heating mode 3 If the unit is in Heating mode release the short circuit across the test run pins on the outdoor control PCB of the main unit Then short circuit the STOP pin CN49 to stop operation of the unit 4 Short circuit the MODE pin CN50 on the outdoor control PCB The 4 way valve will not change at this moment rather it changes just before start of operation It is difficult to confirm the change by listening for the sound 5 Short circuit the TEST pin CN44 on the outdoor control PCB Let the unit operate for a while then check if it is in Cooling mode by carefully touching the gas line 3 2 2 Refrigerant recovery procedures A using ball valve near the indoor unit Cooling operation Ball valve separately purchased Gastube C Nge EE EE ln Service port Outdoor unit Liquid tube Fig 2 3 1 If a ball valve with a service port has been provided near the indoor unit as show
71. gits The setting data is displayed in 8 digits The display changes between the first 4 digits Fig and the last 4 digits Fig B When the first 4 digits are displayed the bottom dot of the colon is illuminated To exit the setting mode press the CHECK button amp and 6 are displayed alternately Example shows display of 0000 0001 Parameter Description Outdoor unit fan Quiet 0 Disabled 1 Quiet mode 0 None 1 Discharge temp control only Mode 3 2 Demand only Mode 2 3 Discharge temp control Demand Mode 1 Energy saving operation 0 Independent plug 1 All indoor units linked 0 0 1 40 4 70 7 100 8 120 9 140 10 160 11 200 12 1 no limit 0 0 1 40 4 70 7 100 8 120 9 140 10 160 11 200 12 1 no limit Energy saving mode Demand 1 current Demand 2 current Mini VRF SYSTEM 6 Mode Settings Outdoor Unit Maintenance Remote Controller B Setting mode 2 Operating procedure D Press and hold the CHECK button button and button simultaneously for 4 seconds or longer Press the temperature setting Ca and _ _ buttons to change the item code The item codes and setting data are shown in the table below TT SETTING i 0000 RC SETDATA Press the timer time 4 and v buttons to change the setting data To confirm the changed setting data
72. hanger is functioning as a condenser indoor unit mode Cooling Control time 1 minute Outdoor units Operates at a compressor frequency of 44 Hz Electronic All indoor units operate at a fixed pulse according to the indoor Indoor control valve unit capacity units Fan The fan operates at the set fan speed is stopped or operates at L fan speed according to the operation mode of the indoor unit When the above operation is finished normal operation starts at the horsepower determined by the indoor units where thermostats are ON 2 Control when outdoor unit heat exchanger is functioning as an evaporator indoor unit mode Heating Control time Min 1 minute to Max 5 minutes until Tc gt 95 F Outdoor units Operates at a compressor frequency of 44 Hz ne All indoor units operate at 480 pulses Indoor control valve units Fan The fan stops When the above operation is finished normal operation starts at the horsepower determined by the indoor units where thermostats are ON N Mini VRF SYSTEM 3 Special Controls Control Functions 3 2 Reverse Cycle Start Control Reverse cycle start control is performed under the following conditions e The outdoor unit starts in Heating mode after microcomputer initialization when the power was turned ON The outdoor unit starts in Heating mode after it was stopped for 1 hour or longer When the outdoor unit starts in Heati
73. he Hi side manifold gauge valve Procedure 3 Open the lower valve Fig 2 12 To terminate the oil charging work do as follows First close the Hi side manifold gauge valve and wait momentarily until the Lo pressure gauge reading shows stable indication Next fully close the HL aide manifold gauge valve Procedure 1 and the lower valve Procedure 3 from the oil charging tank in that order The above steps are used to equalize the internal pressure at the same level as the low pressure sensor outlet and letting refrigerant evaporate in the tank Finally connect the refrigerant recovery unit to the Lo gauge side shut down all indoor and outdoor units and then recover the remaining refrigerant in the oil charging tank manifold gauge valves and connecting hoses Perform these procedures quickly and securely so that no air can enter After charge the necessary amount of new refrigerant by referring to the Installation Instructions that came with the outdoor unit To determine the completion of refrigerant recovery follow the instructions that came with the refrigerant recovery unit Mini VRF SYSTEM Outdoor Unit Repair Procedures 6 Charging Compressor Oil 6 2 If Outdoor Unit Has Not Been Charged with Refrigerant When a compressor has been replaced or in any other case where the outdoor unit has not been charged with refrigerant first charge with refrigerant then follow the instructions in 6 1 If Ref
74. he liquid tube valve and ball valve on the outdoor unit where dry cores are attached 11 Operate the outdoor unit for approximately 3 hours in either Heating or Cooling mode 12 Follow the above procedure and replace all dry cores with new dry cores 13 Operate all outdoor units for approximately 20 minutes in either Heating or Cooling mode 14 Follow the instructions in 2 Discharging Oil in Compressor and drain a small amount of the oil from the oil separators of all outdoor units where dry cores are attached Check the color phase odor and other characteristics 15 If the results show that dry core cleaning is still necessary for example a color phase of 4 0 or higher return to Step 13 and repeat until the results are normal including a color phase of 3 5 or less Aza Perform another dry core replacement after approximately 30 hours of system operation 16 Fully close the liquid tube valve and ball valve on the outdoor unit where dry cores are attached 17 Connect a refrigerant recovery device to the liquid tube service port Schrader type valve on the outdoor unit where dry cores are attached Recover the refrigerant that is in the tubing At this time be careful that air does not enter the tubing 2 20 8 Compressor 18 Remove dry cores Connect the tube that runs from the liquid tube valve to the ball valve 19 At the outdoor unit where dry cores were removed pressurize with 362 6 psi of
75. ilure L18 Control Functions 11 2 Inverter Compressor Alarm Description Occurs when overcurrent 32 5 A is detected during normal P16 E operation Occurs under the same conditions as P16 when the inverter Pen compressor is operating at 80 Hz or higher Occurs when a missing phase or overcurrent 48 A is detected P29 when the inverter compressor starts H31 Occurs when the HIC detects overcurrent 75 A and when an abnormal temperature 302 F is reached The inverter current values include primary current and secondary current Alarm judgment uses both of these current values However in general the secondary current is higher than the primary current 11 3 CT Circuit Detection Failure Alarm Description Compressor 1 inverter compressor Occurs when an open circuit is detected in the inverter HOR compressor CT circuit If the operating frequency of the inverter compressor is low the current value is also low As a result this alarm is detected only when the compressor is stopped 12 Pressure Sensor Failure This system includes a high pressure sensor 12 1 High Pressure Sensor Failure Connector disconnection or displacement failure is judged according to the relationship between the high pressure sensor temperature which is detected by the high pressure sensor and the various temperature thermistors However if the pressure rises suddenly a high
76. instructions when wiring Improper connections and inad equate grounding can cause accidental injury or death e Ground the unit following local electrical codes Connect all wiring tightly Loose wiring may cause over heating at connection points and a possible fire hazard the unit must be grounded When Transporting Be careful when picking up and moving the indoor and outdoor units Get a partner to help and bend your knees when lifting to reduce strain on your back Sharp edges or thin aluminum fins on the air conditioner can cut your fingers To prevent possible hazards from insulation failure When Installing Select an installation location which is rigid and strong enough to support or hold the unit and select a location for easy maintenance In a Room Properly insulate any tubing run inside a room to prevent sweating that can cause dripping and water damage to walls and floors Keep the fire alarm and the air outlet at least 5 feet away from the unit In Moist or Uneven Locations Use a raised concrete pad or concrete blocks to provide a solid level foundation for the outdoor unit This prevents water damage and abnormal vibration In an Area with High Winds Securely anchor the outdoor unit down with bolts and a metal frame Provide a suitable air baffle In a Snowy Area for Heat Pump type Systems Install the outdoor unit on a raised platform that is higher than drifting s
77. ion occurs at the maximum fan mode Quiet mode operation For the setting procedure refer to the separate instructions When Quiet mode is activated the maximum fan mode is reduced compared to maximum fan mode during normal operation Outdoor unit Max fan mode Cooling operation 12 14 Heating operation 12 However during cooling operation if the outdoor air temperature is 91 F or higher the maximum fan mode is 14 1 11 Mini VRF SYSTEM 8 Indoor Unit Electronic Control Valve Control Control Functions INDOOR UNIT 8 1 During Normal Control 1 During Cooling mode operation Electronic control valve position pulses Outdoor unit operating Outdoor unit stopped Stop 20 pulses 20 pulses Fan 20 pulses 20 pulses Thermostat OFF 20 pulses 20 pulses Cooling Thermostat ON 55 480 pulses Performs SH control The target value for SH control is 4 12 F for the temperature difference between E3 and El depending on the operating conditions However the SH target value may increase if the required level decreases In this case because the electronic control valve position moves toward the closed side you should not assume that there is insufficient gas 2 During Heating mode operation Electronic control valve position pulses Outdoor unit operating Outdoor unit stopped Control to prevent refrigerant Stop 99 8 pulses accumulation 85 pulses Contro
78. ion signal lt E06 gt from the indoor unit i Improper setting of indoor unit Indoor unit address setting is duplicated E08 atlas Remote controller address connector RCU ADR is duplicated lt lt E09 gt gt Duplication of main remote controller y e i e During auto address setting Starting auto address setting is prohibited i number of connected units This alarm message shows that the auto address connector CN100 E12 does not correspond to is shorted while other RC line is executing auto address operation number set i When turning on the power Error in auto address setting Number of connected indoor units E15 supply number of connected is less than the number set i units does not correspond to Error in auto address setting Number of connected indoor units E16 i number set is more than the number set e Xt Except R C address is 0 No indoor unit is connected during auto address setting E20 Error of outdoor unit address setting E25 Indoor unit communication Error of main indoor unit in receiving serial communication signal un E18 xt 0 0 error of group control wiring from sub indoor units Improper setting This alarm message shows when the indoor unit for multiple use is L02 i i not connected to the outdoor unit Duplication of main indoor unit address setting in group control lt L03 gt i i There are 2 or more indoor units Priority set remote controller L05 controllers
79. iphon tube Liquid refrigerant should be recharged with the cylinder standing on end as shown New refrigerant R410A cannot be used for earlier models 1 Compressor specifications are different If recharging a R22 or R407C compressor with R410A durability will significantly decrease since some of the materials used for compressor parts are different 2 Existing tubing cannot be used especially R22 Completely cleaning out residual refrigerating machine oil is impossible even by flushing 3 Refrigerating machine oil differs R22 Since R22 refrigerating machine oil is mineral oil it does not dissolve in R410A Therefore refrigerating machine oil discharged from the compressor can cause compressor damage R22 refrigerating machine oil Mineral oil Suniso oil R407C refrigerating machine oil Synthetic fluid ether oil R410A refrigerating machine oil Synthetic fluid ether oil Section 1 Section 2 Section 3 Section 4 Section 5 CONTENTS CONTROL FUNCTIONS 5a din iron ca REENEN DR mia cla RRA 1 1 IMEEM ICT 1 2 2 Compressor Control 12a auae aaae hee oh eonim doa d a EN sanded 1 3 a Sp cial Controls rers d n irs n x Roe S C E de QUE E aed RE de wees 1 7 d Omer Conuol PCT ET 1 10 5 Operation of Solenoid Valves rus E ee ss ae oe ck ERE ER 1 10 6 Outdoor Unit Electronic Control Valve Motor Valve Control MOV1 1 10 7 Outdoor Fan Control 22220 co arado NEE
80. iring Group 0001 Main unit One of the group control indoor units II Control LI address 0002 Sub unit All group control indoor units except for main unit 0099 Not set 010 Shifts intake temperature by 20 F 10 C 009 Shifts intake temperature by 18 F 9 C Cooling 001 Shifts intake temperature by 2 F 1 C I intake it temperature 0000 No intake temperature shift shift 0001 Shifts intake temperature by 2 F 1 C 0009 Shifts intake temperature by 18 F 9 C 0010 Shifts intake temperature by 20 F 10 C Automatic 0000 Function disabled stop time E after 0001 Stops automatically 5 minutes after operation starts operation 0002 Stops automatically 10 minutes after operation starts tart Ta 5 ERIGI t t Can be set 0123 Stops automatically 615 minutes after operation starts in 5 minute units 0124 Stops automatically 620 minutes after operation starts 0125 Stops automatically 625 minutes after operation starts 4 5 Mini VRF SYSTEM 2 Detailed Settings Function Remote Controller Functions mme mm Seting data Description lla 18 Forced thermostat ON time TT minutes minutes 010 20 F 18 F Cooling discharge 16 F temperature shift 0010 010 20 F 20 F 18F Heating discharge 008 16 F temperature shift Q Lm o 00 AIO o m o 0010 0001 Temperature shift for 000
81. it 2 2 Since refrigerant composition changes and performance decreases when gas leaks collect the remaining refrigerant and recharge the required total amount of new refrigerant after fixing the leak 3 Different tools required 3 1 Tool specifications have been changed due to the characteristics of R410A Some tools for R22 and R407C type refrigerant systems cannot be used N R407C tools Manifold gauge Item ei compatible Remarks tool with R410A Manifold gauge Yes No Types of refrigerant refrigerating machine oil and pressure gauge are different Charge hose Yes No To resist higher pressure material must be changed Vacuum pump Yes Yes Use a conventional vacuum pump if it is equipped with a check valve If it has no check valve purchase and attach a vacuum pump adapter Leak detector Yes No Leak detectors for CFC and HCFC that react to chlorine do not function because Vacuum pump R410A contains no chlorine Leak detector for HFC134a can be used for R410A Flaring oil Yes No For systems that use R22 apply mineral oil Suniso oil to the flare nuts on the tubing to prevent refrigerant leakage For machines that use R407C or R410A apply synthetic oil ether oil to the flare nuts Outlet Using tools for R22 and R407C and new tools for R410A together can cause defects 3 2 Use R410A exclusive cylinder only Valve Single outlet valve with s
82. l to prevent refrigerant 55 80 pulses Fan accumulation 85 pulses Control to prevent refrigerant Thermostat OFF 55 80 pulses accumulation 85 pulses Heat Thermostat ON 55 480 pulses Performs SC distribution control The target value for SC control is 10 40 F for the temperature difference between the pressure sensor temperature and E1 depending on the operating conditions 1 12 8 Indoor Unit Electronic Control Valve Control Ee 9 Indoor Special Control Control Functions 8 2 During Special Control Control type Operating mode Target indoor units Electronic control valve position pulses Fixed pulses for cooling corresponding to Cooling All indoor units the indoor unit capacity 4 way valve switching control Heating All indoor units 480 Fixed pulses corresponding to the indoor OFF unit capacity Fan Fixed pulses corresponding to the indoor unit capacity Reverse cycle Heating start control Fixed pulses corresponding to the indoor Thermostat ON i unit capacity Heating Fixed pulses corresponding to the indoor Thermostat OFF 8 unit capacity Inter systems refigerant oil Cooling Heating All indoor units recovery control Fixed pulses corresponding to the indoor unit capacity Fixed pulses corresponding to the indoor OFF unit capacity Fan Fixed pulses corresponding to the indoor unit c
83. n in Fig 2 3 follow the instructions given in 2 through 6 below If the service port is instead located in the outdoor side follow the instructions in 3 2 3 Refrigerant recovery procedures B 2 After running the unit in Cooling mode for about 5 minutes fully close the liquid line ball valve 3 Run the unit in Cooling mode for 10 to 20 minutes more 4 Fully close the gas line service valve Ha a a 5 Use hoses to connect the manifold gauge valves refrigerant recovery unit and refrigerant recovery cylinder with each other Fig 2 4 Do each connection quickly to prevent air from entering the tubing CAUTION Remaining refrigerant may create internal pressure therefore care should be taken when connecting the hoses 6 Recover the remaining refrigerant from the indoor unit using the refrigerant recovery unit To determine completion of refrigerant recovery follow the instructions that came with the refrigerant recovery unit 2 8 3 R S Refri Mini VRF SYSTEM Recovering Refrigerant Outdoor Unit Repair Procedures Manifold gauge Lo H Refrigerant recovery unit Refrigerant recovery cylinder Ball valve separately purchased Gastube OZ EI ogeM e 4 Service port Outdoor unit Liquid tube Fig 2 4 Mini VRF SYSTEM 3 Recovering Refrigerant Outdoor Unit Repair Procedures 3 2 3 Refriger
84. n the outdoor unit maintenance remote controller e Double speed Fig 3 3 Do not use for actual operation Doing so may damage the devices Operation The timer button 4 can be used to change between double speed and normal operation During double speed operation the SLEEPING MODE as mark is displayed Mini VRF SYSTEM Outdoor Unit Maintenance Remote Controller Ko JCT 538 8598 Cur 4 o MERO ua E EE Ges PROGRAM COPY Fig 3 2 y E E ios s CB A Mini VRF SYSTEM 3 Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller B Display functions Use the temperature setting Ta and Ev buttons to change the item code bom ii Outdoor unit alarm Alarm code display No of connected indoor units Quantity ilz Unit Nos of connected indoor unit 7 segment display WE Operating status of indoor unit 7 segment display Thermostat ON status of indoor unit 7 segment display Operating status of outdoor unit compressor 7 segment display Compressor 1 operating time 0 99999999 hrs En za Sz ix Ee oe Ln Eu L mem Lu Outdoor unit power ON time 0 99999999 hrs Compressor 1 operation count 0 65535 times NN NN rit Alarm history 1 most recent Alarm history 2 d Alarm hi
85. n the outdoor unit may create internal pressure CAUTION Before connecting hoses be sure to confirm that each of the manifold gauge valves is tightly closed Note that the connection ports employ Schrader type press to release valves 4 Connect the manifold gauge valves refrigerant recovery unit and recovery cylinder using hoses To avoid the entry of air into the refrigerant tubing carry out this connection work carefully For detailed procedures such as connecting the refrigerant recovery unit CAUTION with the recovery cylinder and methods used for recovery follow the specific instructions that came with the refrigerant recovery unit 5 Locate the AP pins on the control PCB in the outdoor unit and short them using the clips of the jumper wire Then restore electrical power to the outdoor unit By short circuiting the AP pins each electronic expansion valve in the outdoor unit is forcibly opened as soon as power comes on which releases all remaining refrigerant into the recovery cylinder Since neglecting this procedure may leave some refrigerant in the system it is important that you carry out this step 6 Carry out refrigerant recovery To determine the completion of refrigerant recovery follow the instructions CAUTION that came with the refrigerant recovery unit Low pressure outlet port For 95 16 connector
86. n this setting is ON however it is necessary to set the weekly timer ON time OFF reminder function for weekly timer Continued Mini VRF SYSTEM 2 Detailed Settings Function Remote Controller Functions Continued from previous page seg tem feier Heat exchanger temperature for The heat exchanger temperature control point for prevention of cold air 3C Sen cold air discharge discharge during heating operation can be changed TOS The indoor unit PCB optional output for the fan can be switched Fan output switching according to the purpose of use Drain pump delayed start time oe pump starts after the set time delay after cooling operation Humidifier drain pump setting This specifies the humidifier and drain pump setting DC flap operation mode Changes flap operation to draft reduction mode DC flap swing mode Selects the swing operation mode for the flap Sets the humidifier output ON time for when the humidifier is operating Humidifier ON time ON OFF control is performed during humidifier operation This setting therefore sets the ON time per 60 second interval This setting enables a function that stops operation when the amount of time set for the OFF timer has passed after remote controller operation was started Timer function change prohibit This function prohibits changes from being made to the remote controller time setting Smudging control Smudging control is disabled when 0000 is set Stop at time se
87. nd HIC If there is a short circuit there is an HIC malfunction HIC HIC A nmm 7 E EN DY HIC PCB Correction If an HIC failure is found replace the PCB Example SS Notes Turn OFF the power and check the conductivity of HIC and HIC on the HIC PCB L04 alarm Alarm code L04 Alarm meaning Outdoor system address duplication Alarm conditions Communication by inter unit control wiring was received that contained the same address as that unit 5 times or more within 3 minutes Probable cause Incorrect outdoor system address settings Check Check the system address settings again Correction Correct the system address settings Example Notes Recovery from this alarm occurs automatically when communication that contains the same address as that unit is not received for 3 minutes after detection 4 Mini VRF Alarm Codes L05 alarm Mini VRF SYSTEM Trouble Diagnosis Alarm code L05 Alarm meaning Indoor unit priority duplication at priority indoor units Alarm conditions More than 1 indoor unit set for priority was detected Probable cause More than 1 indoor unit is set for priority Check From the wired remote controller use the indoor unit EEPROM simple setting mode and check that the value of item code 04 is 0001 Correction Use the wired remote controller and correct the setting if the value of indoor EEPROM item co
88. nd setting data refer to the following page Press the button The display stops blinking and remains lit and setting is completed Press the button to return to normal remote controller display Mini VRF SYSTEM 1 Simple Settings Function Remote Controller Functions List of Simple Setting Items Description 0000 _ Not displayed 0001 150 hours Filter sign ON time 0002 52 500 hours fitlter life time 0003 15 000 hours 0004 110 000 hours Use the filter clogging sensor Standard setting at time of shipping Degree of filter fouling 0001 Highly fouled Filter sign ON time is reduced to one half the set time 0001 Central control address 1 0002 Central control address 2 0003 Central control address 3 Central control address H 0064 Central control address 64 Operating mode Normal setting at time of Aum priority change Priority CompesorON Compressor OFF Fan speed when heating thermostat is 0002 Shifts intake temperature 4 F down eu Electric heater No heater installation ncn installed Humidifying when 0000 No setting at time of No setinpattmeofshiping heater thermostat is Permit prohibit 0000 Permit automatic 0000 Cool only Set 1 for item code OD Cool only n order to avoid water leakage and damage to the fan do not set for humidifying when the thermostat is OFF unless a vaporizing humidifier is used Consi
89. ned off Modify power to permit turning off for indoor unit where refrigerant is LL power to refrigerant recovered Y recovered NO indoor units independently Open ball valve y YES Y Change controllable number of indoor Ready for operation units including changes in group La y control and integrated control settings END Y Other indoor units can operate normally Y Replace or repair faulty unit r gt Check for leakage in repaired unit Y Replace or repair faulty unit Evacuate air from repaired unit Y Y Check for leakage in repaired unit Charge refrigerant in repaired unit i Amount of charge should equal that E fe affi ired unit recovered by refrigerant recovery unit Nee Change controllable number of indoor Charge refrigerant in repaired unit units including changes in group Amount of charge should equal that control and integrated control settings recovered by refrigerant recovery unit D Y Open ball valve Open the ball valve y Y Ready for normal operation Ready for normal operation i Y END END Service work performed on indoor units is done simultaneously using the service ports at the liquid tube side and the gas tube side ball valves Refer to each section in the Installation Instructions on refrigerant charging leak checking and evacuation procedures e Mini VRF SYSTEM 3 Recovering Refrigerant Outdoor Unit Repair Procedures 3 2 1 Coolin
90. nfirm the change by listening for the sound 6 Short circuit the TEST pin CN44 on the outdoor control PCB of the unit Let the unit operate for a while then check if it is in Heating mode by cautiously touching the gas line 7 Slowly close the liquid line service valve of the outdoor unit to be repaired 8 When the low pressure gauge reading shows 72 5 psi or less pull out the EXL2 connector 3P YEL CNO037 on the control PCB of the outdoor unit to be repaired and then fully close the gas line service valve immediately By pulling out the EXL2 connector all outdoor units stop immediately While closing the valve the outdoor unit may suddenly stop This is because a Ara protective function such as for discharge temperature is working In this case also fully close the gas line service valve immediately 9 Connect the high pressure sensor outlet of the outdoor unit to be repaired to the manifold gauge valves at the Hi side Also connect the manifold gauge valves to the refrigerant recovery unit Perform the connection work quickly so that no air is allowed to enter 10 Open both Hi and Lo side valves on the manifold gauge valves and recover the refrigerant remaining in the outdoor unit After that measure the amount of recovered refrigerant Mini VRF SYSTEM Outdoor Unit Repair Procedures 7 Pumping Out Refrigerant from Outdoor Unit To determine the completion of refrigerant recovery follow the instructions that
91. ng mode after having been stopped for a long period of time this control first operates the unit in Cooling mode to return refrigerant from the outdoor unit heat exchanger to the liquid tubing This prevents back flow of the refrigerant liquid which had accumulated in the outdoor unit heat exchanger Control time 1 minute Outdoor units Operates at a compressor frequency of 46 Hz Electronic All indoor units operate at a fixed pulse according to the indoor Indoor control valve unit capacity units The fan operates at the set fan speed is stopped or operates at Fan L fan speed according to the operation mode of the indoor unit 3 3 Inter Systems Refrigerant Oil Recovery Control 3 3 1 Inter systems refrigerant oil recovery cycle In both indoor unit Cooling mode and Heating mode this control is performed in the cooling cycle after a certain amount of time has passed 3 3 2 Start of inter systems refrigerant oil recovery control This control is performed periodically after the total compressor operating time exceeds 150 minutes 3 3 3 Flow of inter systems refrigerant oil recovery control 1 Simplified flow of inter systems refrigerant oil recovery control Inter systems refrigerant oil recovery control follows this flow process Normal gt 1 minute Inter systems refrigerant oil 1 minute E Normal operation stop recovery control 3 minute stop operation Control time 3 minutes stops once before and
92. ng or dry Cooling or dry ewe lm Dry Heating Dry Heating Heating Heating Fan Cooling Cooling or dry Fan Dry Fan Heating Fan not changed Cooling Fan not changed Cooling not changed Dry not changed Cooling Fan not changed Cooling not changed Dry not changed Fan not changed Heating Heating Fan Heating not changed Fan not changed Item Fan speed setting when heating thermostat is OFF Heating intake temperature shift Electric heater installation Description Changes the fan speed setting when the heating thermostat is OFF Shifts the intake temperature during heating Can be set when the body thermostat is used Set when cost distribution is performed using an AMY central control system or similar system and when an optional electric heater is installed This is unrelated to control of the electric heater Humidifying when heater thermostat is OFF Normally humidifying does not occur when the thermostat is OFF during heating operation However this setting can be changed in order to increase the amount of humidifying Caution In order to avoid water leakage and damage to the fan do not use this setting unless a vaporizing humidifier is used Permit prohibit automatic heating cooling Cooling only 07 08 OD This setting can be used to prevent the automatic heating cooling display on the remote control if the unit configuration permits automati
93. nit maintenance remote controller is connected i Mini VRF SYSTEM 2 Functions Outdoor Unit Maintenance Remote Controller E Functions on the ordinary display 1 Functions Button operations can be used to perform the following functions e Start stop of all indoor units Switching between cooling and heating Test run of all indoor units Double speed operation of indoor units Do not use for actual operation Doing so may damage the devices 2 Display The following can be displayed Alarm details display No of indoor outdoor units Unit Nos of connected indoor outdoor units Indoor outdoor unit operating status blinks when an alarm occurs Indoor unit thermostat ON Display of individual outdoor unit alarms Total operating time of outdoor unit compressors Oil level of the outdoor unit oil sensor Total outdoor unit power ON time Outdoor unit microcomputer version other information B Temperature monitor Displays the indoor outdoor unit sensor temperatures E Outdoor unit alarm history monitor Displays the outdoor unit alarm history B Mode settings Setting mode 1 and setting mode 2 are used to make the outdoor EEPROM setting Mini VRF SYSTEM 3 Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller E Functions on the ordinary display Connect the special service checker wiring to the outdoor unit PCB The connection is shown in the figure below
94. nitrogen from the liquid tube service port and check for leaks 20 After draining all nitrogen from the tubing apply vacuum to the outdoor unit where dry cores were removed until the pressure is 14 7 psig 5 Torr or less using the liquid tube service port 21 Refer to the Installation Instructions Charge with an amount of refrigerant equal to the amount that was recovered 8 4 Replacing the Compressor When removing and installing compressors use sufficient caution to ensure that water or other substances do not enter the refrigerant tubing system 8 4 1 Replacing the compressor A Replacing the inverter compressor Compressor 1 on remote controller alarm display E Removal 1 Connect a manifold gauge to the high and low pressure outlet ports at the outdoor unit where the compressor will be replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen replacement 2 Follow the procedure for removing panels and remove the front panel the right lower panel and the electrical component box cover Fig 2 16 3 Follow the refrigerant work procedure and recover the refrigerant 4 Remove the acoustic material that surrounds the compressor 3 layers 5 Remove the cap from the compressor terminal plate Disconnect the power terminal and internal terminal 6 Remove the crankcase heater Remove the 3 flange washers that are attached to the compressor legs as shown in Fig 2 17
95. now Provide snow vents When Connecting Refrigerant Tubing Ventilate the room well in the event that is refrigerant gas leaks during the installation Be careful not to allow contact of the refrigerant gas with a flame as this will cause the generation of poisonous gas Keep all tubing runs as short as possible Use the flare method for connecting tubing Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them then tighten the nut with a torque wrench for a leak free con nection Check carefully for leaks before starting the test run When performing piping work do not mix air except for speci fied refrigerant R410A in refrigeration cycle It causes capacity down and risk of explosion and injury due to high tension inside the refrigerant cycle Refrigerant gas leakage may cause fire Do not add or replace refrigerant other than specified type It may cause product damage burst and injury etc N WARNING Do not leak refrigerant while piping work for an installation or re installation and while repairing refrigeration parts Handle liquid refrigerant carefully as it may cause frostbite When Servicing Turn the power OFF at the main power box mains before opening the unit to check or repair electrical parts and wiring Keep your fingers and clothing away from any moving parts Clean up the site after you finish remembering to
96. of this CT and check If current is detected then the PCB can be judged OK CT circuit failure Check that current is flowing in the phase where the CT circuit is connected Check voltage and current 2 Crossed wiring or installation error Trouble When the compressor is stopped the current value at the other compressor is high 3 If the cause is still unknown after checking the above then it is possible that noise is the cause of the trouble It is necessary to connect a PC or other instrument Correction 1 Replace the CT circuit 2 Replace the outdoor unit PCB 3 Correct the problem Example 1 The connector was not inserted after the PCB was replaced Notes Use a normal CT as a tool to determine whether the trouble is a PCB failure or CT failure 4 Mini VRF Alarm Codes H31 alarm Mini VRF SYSTEM Trouble Diagnosis Alarm code H31 Alarm meaning HIC trouble alarm Alarm conditions This alarm occurs when the microcomputer identifies a trouble signal indicating abnormal HIC temperature or other trouble from the HIC Probable cause The HIC judges the current and temperature and outputs the trouble signal In general this indicates trouble with the HIC itself Check Check the power wiring and connector wiring If the wiring and connectors are normal use a tester to measure the resistance between the compressor HIC power HIC and grou
97. ons This allows the filter lifetime operating mode Remote Controller Functions Section priority change central control address and other settings to be made for an individual or group control indoor unit to which the remote controller used for simple settings is connected When simple settings mode is engaged operation stops at the individual or group control indoor unit to which the remote controller for simple settings is connected Procedure D Press and hold the and T buttons simultaneously for 4 seconds or longer O Bang unit No f or ALL in the case of Ud group control item code OG and settings data COPY J PROGRAM fi XX are displayed blinking on the remote A e EES EM 8 controller LCD display Fig 4 1 At this time the FO indoor unit fan or all indoor unit fans in the case of group control begins operating S m CZ RTC2 3 If group control is in effect press the button and select the address unit No of the Fig 4 1 indoor unit to set At this time the fan at the indoor unit begins operating If unit No AL is displayed the same setting will be made for all indoor units Press the temperature setting C E v 3 buttons to select the item code to change Press the timer time 2 v buttons to select the desired setting data For item codes a
98. perature setting r Mini VRF SYSTEM 2 Detailed Settings Function Remote Controller Functions 1F Upper limit 20 Lower limit Cooling 21 Upper limit This setting changes the temperature range upper limit and lower limit 22 Lower limit Change to the remote which is set from the remote controller or central control device control temperature The set upper limit must be greater than or equal to the lower limit If the 23 Upper limit setting range temperature setting is to be a single point set the upper limit and lower 24 Lower limit limit to the same temperature Heating Drying 25 Upper limit Auto 26 Lower limit heat cool During heating operation the humidifier operates when the heat Humidifier operation which ignores exchanger temperature is suitable for humidifying This setting is the heat exchanger temperature used to ignore this condition for humidifier operation and operate the humidifier more Filter input switching This setting switches the filter input according to the purpose of use This setting indicates whether or not an indoor unit electronic control valve is present At the time of shipping this setting is set according to the conditions of the indoor unit Indoor unit electronic control valve Ordinarily the T10 terminal is used as the HA terminal at the time of T10 terminal input switching shipping However this setting is used when the T10 terminal is used for OFF remind
99. pressure sensor failure warning may be judged before the high pressure sensor activates Therefore check the following before determining that a pressure sensor failure has occurred Has the service valve been left open s there a blocked circuit s there leakage of refrigerant into stopped outdoor units Also check the difference between the high pressure as measured by a manifold gauge and the pressure as detected by the pressure sensor Alarm Description F16 High pressure sensor failure 13 4 Way Valve Failure L18 When a 4 way valve coil failure coil disconnection or similar failure occurs a judgment is made automatically from the operating conditions and an alarm is output 1 15 Mini VRF SYSTEM 14 Servicing and Maintenance Functions Control Functions The below functions are available and are selected by the outdoor unit EEPROM settings 14 1 Outdoor Unit Noise Countermeasures outdoor Quiet mode function This function reduces the operating noise to lessen the noise produced by the outdoor unit When this mode is selected noise reduction is given priority during operation and the outdoor fan mode and compressor operating frequency are restricted to approximately 80 of capacity The following two operations are required in order to engage this mode This mode cannot be engaged when nei ther 1 nor 2 below has been completed 1 Outdoor unit EEPROM settings Outdoor unit EEPROM
100. problem is found purge all nitrogen from the system Low pressure outlet port For 95 16 connector E E Manifold gauge Lo QA Hi Nitrogen gas High pressure outlet port For 65 16 connector Fig 2 6 4 2 Checking for Leakage in Refrigerant Tubing Between Indoor and Outdoor Units Refer to the Installation Instructions that came with the outdoor unit S Mini VRF SYSTEM 5 Evacuating System Outdoor Unit Repair Procedures This procedure is carried out to ensure there is no remaining refrigerant or other gases nitrogen etc in the repaired outdoor unit and tubing 5 1 Evacuating Repaired Outdoor Unit 1 Check that each service valve of the gas line and the liquid line in the outdoor unit are fully closed If the AP pins CN46 on the outdoor control PCB have already been short circuited steps 2 and 5 are not necessary 2 Turn off power to the outdoor unit to be evacuated 3 Connect the manifold gauge valves to the high and low pressure sensor outlets of the outdoor unit 4 Connect the manifold gauge valves to the vacuum pump 5 Short circuit the AP pins on the outdoor control PCB and turn on power to the repaired outdoor unit By short circuiting the AP pins and turning on power to the outdoor unit all Ara electronic expansion valves in the outdoor unit are forcibly opened and any remaining nitrogen gas can be recovered Failure to perform this procedure may result in nitrog
101. r in cases of disconnected serial connector no terminal unit set or other trouble that occurs before initial communications are completed If initial communications have not been completed alarm E04 occurs E12 alarm Alarm code E12 Alarm meaning Automatic address setting start is prohibited Alarm conditions Automatic address setting was started when automatic address setting was in progress at another outdoor unit in the same link Probable cause Automatic address setting is in progress at another outdoor unit Check This alarm is not displayed on the remote controller Therefore check the blinking LED display on the outdoor unit PCB Wait for automatic address setting to be completed at the outdoor unit where it is currently in Correction progress Then start automatic address setting again Example ER Notes E15 alarm Alarm code E15 Alarm meaning Automatic address setting alarm too few units Alarm conditions The number of indoor units was too few when automatic address setting was performed Probable cause 1 The number of indoor units set at the indoor unit quantity setting SW 8004 on the outdoor unit PCB is too many 2 The inter unit control wiring between indoor units has been cut S004 CR CHX06052 Check 1 Refer to the test run servicing materials and check the indoor unit quantity setting SW S004 2 Check the inte
102. r onto the compressor 3 Place the cushioning rubber in the designated positions on the compressor There are 3 pieces for an inverter compressor 4 Set the new compressor into the unit 5 Shape the tubes and insert them at the 2 welding locations 7 Increase the pressure to the nitrogen airtightness test pressure of 362 6 psi Check that no leakage occurs 8 Re install all components that were removed Re install the electrical component box in the same position as it was before 4 5 6 Use nitrogen to replace the air inside the compressor Perform brazing at all parts 7 8 9 After the airtightness test is completed apply vacuum until a pressure of 14 7 psig 5 Torr or less is reached at the indoor and outdoor units and in the tubing 10 After applying vacuum charge with refrigerant For the refrigerant charging methods refer to Installation Instructions Charge with the total of the refrigerant amount at time of shipment plus the additional charge amount Listed on the nameplate and description label Connection port Be sure to perform refrigerant charge using liquid refrigerant Schrader type High pressure sensor 11 Never use any refrigerant other than R410A 9 High Pressure Sensor The high pressure sensor connection port on the outdoor unit includes a Schrader type push to release valve It is not necessary
103. r unit control wiring at the indoor and outdoor units Correction After correcting the indoor unit quantity setting or the inter unit control wiring perform automatic address setting again Example Notes E ze 4 Mini VRF Alarm Codes E16 alarm Mini VRF SYSTEM Trouble Diagnosis Alarm code E16 Alarm meaning Automatic address setting alarm too many units Alarm conditions The number of indoor units was too many when automatic address setting was performed After initial communications were completed an unrecognized unit was detected Probable cause 1 The number of indoor unit setting SW S004 on the outdoor unit PCB is too small 2 The inter unit control wiring is wired incorrectly Check 1 Refer to the test run servicing materials and check the number of indoor units that is set 2 Check the inter unit control wiring at the indoor and outdoor units Correction After correcting the indoor unit quantity setting or the inter unit control wiring perform automatic address setting again Example Notes Em E20 alarm Alarm code E20 Alarm meaning No indoor units at automatic address setting Alarm conditions When automatic address setting was performed no indoor units were recognized Probable cause 1 The inter unit control wiring from the outdoor unit to the indoor units has been cut 2 Serial connector 1 CN32 is di
104. ration cycle Color Odor Total acid value Hue Normal Yellowish None 0 02 or less 3 5 or less 0 06 or over 4 0 or over Abnormal overheat Smells somewhat operation Brownish not as strong as below Changing the oil and system cleaning with dry cores are necessary Motor burmout Brownish Pungent burnt odor Changing the oil and system cleaning blackish with dry cores are necessary It is difficult to measure the total acid value in the field therefore oil hue and odor are the rule of thumb Checking for carbon deposits and abrasive metal powder can additionally be used to assess the system condition Mini VRF SYSTEM 3 Recovering Refrigerant Outdoor Unit Repair Procedures The following equipment and tools are required Jumper wire with clips adjustable wrench set of manifold gauge valves specially designed for refrigerant R410A only vacuum pump refrigerant recovery unit pre purged refrigerant cylinder for recovery air already evacuated and hex wrench 4 mm for liquid tube and 5 mm for gas tube 3 1 Refrigerant Recovery Procedures From Outdoor Unit 1 Turn off the power of the outdoor unit beforehand at power mains 2 Fully close each service valve on the gas line and liquid line of the outdoor unit 3 Connect the outdoor unit s high pressure and low pressure outlet ports with the Hi and Lo sides of the manifold gauge valves using hoses See Fig 2 2 The remaining refrigerant i
105. repaired Measure the weight of the refrigerant and cylinder itself beforehand and provide sufficient safety measures such as installing a high pressure cutout in the circuit The hoses may be subject to internal pressure from the refrigerant inside the Ara outdoor unit Check that the manifold gauge valves are fully closed beforehand A Schrader type push to release valve is provided at each connection port 2 Short circuit the TEST pin CN44 on the outdoor control PCB of the main unit 3 After operating the unit for a while judge whether it is running in Cooling or Heating mode by touching the gas line cautiously with your fingers If it is running in Cooling mode follow the instructions given in 4 through 6 The gas line reaches a low temperature under 68 F during cooling operation and a high temperature over 140 F during heating operation the tubing becomes very hot about 140 F when Heating mode is used A cavon Be careful when testing the temperature of the gas line with your fingers because 4 If the unit is in Cooling mode temporarily release the short circuit across the test run pins on the outdoor control PCB of the unit Then short circuit the STOP pin CN49 to stop operation of the unit 5 Short circuit the MODE pin CN50 on the outdoor control PCB of the main unit The 4 way valve will not change at this moment rather it changes just before start of operation It is difficult to co
106. ress x 2 seconds 3 Start after System address x 3 seconds lt Reference gt Indoor unit discharge temperature control Operating mode Cooling Heating Discharge temperature control value 53 122 Enter shift value for indoor EEPROM setting 1D Enter shift value for indoor EEPROM setting 1C Change method The method is the same as ordinary indoor unit discharge temperature shift 1 16 Mini VRF SYSTEM Contents Outdoor Unit Repair Procedures 2 OUTDOOR UNIT REPAIR PROCEDURES Layout Diagram Sensors and Solenoid Valves 0 ooooooooommmmmmmmoo 2 2 Layout Diagram Sensors iussa xoa d Rr AA a 2 3 CH ET 2 4 2 Discharging Oil in Compressor oooocccoconccc eee 2 5 3 Recovering Refrigerant iussa dk i hono 888 AA RA Ro RA LE 2 6 4 Checking for Leakage After Repair oooococoncoccnn eee eee 2 11 5 EvacHating System seo eaa AA RR CAT RC AR RR QR DR RR OCA n Ra 2 12 6 Charging Compressor Oil jcc eae eee cr nan Rn 2 13 7 Pumping Out Refrigerant from Outdoor Unit 000 0c eee ee 2 17 8 COMPresSOT siii er sober wwe eg REF RR RU NO ERE RR RR VR ea RE NE RW A 2 19 9 High Pressure Sensor NNN EEN am ERREUR RR RR a eee eee 2 22 Mini VRF SYSTEM Layout Diagram Sensors and Solenoid Valves Outdoor Unit Repair Procedures TS suction thermistor MOV electronic motor operated valve
107. ressor runs more than 80Hz DCCT b i secondary current or ACCT primary current is detected at a time P26 other than when IPM has tripped i i Inverter for compressor is unusual DC compressor does not P29 i operate b IPM trip IPM current or temperature H31 o Thermistor Indoor thermistor is either Indoor coil temp sensor E1 lt lt F01 gt gt fault open or damaged Indoor coil temp sensor E2 lt lt F02 gt gt Indoor coil temp sensor E3 lt lt F03 gt gt xt i Indoor suction air room temp sensor TA lt lt F10 gt gt Indoor discharge air temp sensor BL lt lt F11 gt gt Outdoor thermistor is either Comp discharge gas temp sensor TD F04 open or damaged Outdoor coil liquid temp sensor C1 F07 Outdoor air temp sensor TO F08 xt Xt l O Compressor intake port temperature sensor TS F12 i i High pressure sensor F16 b i EEPROM on indoor unit PCB failure F29 xt i xt Protective Protective device for EEPROM on the outdoor unit PCB has failed Fa XE 1 XE device for compressor is activated i i compre der Current is not detected when comp is ON H03 i activated Xt Overload current is detected H01 i i Mini VRF SYSTEM 2 Outdoor Unit Control Panel LED Display Trouble Diagnosis O ON Y Blinking e OFF LED Display meaning D042 1 D043 2 O O After the power is turned ON and automatic address setting is not in progress no communic
108. rigerant Has Already Been Charged to Outdoor Unit and charge with oil Or alternatively follow the procedure below Low pressure outlet port 1 Connect a tube to the low pressure outlet port on For 65 16 connector the outdoor unit to be charged with oil Insert the Ts other end of the tube into the oil container e o 2 Follow the instructions in 5 Evacuating System and apply vacuum to the outdoor unit to be charged with oil When this is done oil is charged Manifold into the outdoor unit through the oil outlet port gauge Lo 2 Hi 3 When the unit has been charged with the designated amount of oil stop the vacuum pump Ara Because oil absorbs moisture readily this work must be completed quickly Vacuum pump High pressure outlet port For 05 16 connector Op Fig 2 13 6 3 Charging Additional Compressor Oil After Replacing Compressor Model name Compressor model Q ty Pre charged amount of oil gal U 36LE1U6 U 52LE1U6 C 9RVN273HOW 1 0 50 U 36LE1U6E U 52LE1U6E Inverter controlled rotary compressor The rated amount of oil is pre charged in the compressors as given below When replacing a faulty compressor be sure to first measure the amount of remaining oil in the compressor Charge additional new oil equal to the difference in the remaining oil and the rated amount as listed above For example Type of replaced compressor C 9RVN273HOW
109. sconnected at the outdoor unit 3 The power is OFF at all indoor units in the system Position of serial connector 1 CR CHX06052 Check 1 Check whether the inter unit control wiring from the outdoor unit to the indoor units is cut 2 Check whether serial connector 1 CN32 is disconnected at the outdoor unit 3 Check the power at the indoor units Correction 1 Repair inter unit control wiring from outdoor indoor units 2 Plug connector 1 CN32 in correctly 3 Turn on the power to indoor units Example Notes IFALBIBI00300 0 4 CR CHX06052 MN pce assy MN E25 alarm Alarm code E25 Alarm meaning Outdoor unit address setting failure duplication Alarm conditions Communication by outdoor unit main sub control wiring was received that contained the same address as that unit 5 times or more within 3 minutes Probable cause The unit number is set incorrectly Check Check the unit number again Correction Correct the incorrect unit number setting Example Notes Recovery from this alarm occurs automatically when communication that contains the same address is not received for 3 minutes Mini VRF SYSTEM 4 Mini VRF Alarm Codes Trouble Diagnosis F04 alarm Alarm code F04 Alarm meaning Compressor 1 discharge temperature sensor trouble Alarm conditions 1 A temperature of 212 F or higher was detected 20 minutes or longer
110. story 3 3 Alarm history 4 Alarm history 5 Alarm history 6 Alarm history 7 Alarm history 8 oldest AAA AAA DI Firmware version Display the version No x 100 FF Program version Display the version No x 100 aa aa aa aa NX A 1t Pl pi I L Lui EC Outdoor unit alarm No of connected indoor units Unit Nos of connected indoor unit Operating status of indoor unit Thermostat ON status of indoor unit Ooo O o ee Operating status of outdoor unit compressor SS SS MM Compressor 1 operatingtime AAA AA OOO AAA IN Outdoor unit power ON time Compressor 1 operation count WE ES WE Alarm history 1 mostrecen Aarm neen Aarm Heen Aarm pisov o Aarm neen Alarmbistory Aarm neen 3 Ordinary Display Controls and Functions B XX YY R C Fig 3 4 Displays the outdoor unit sub bus address which is currently selected XX Outdoor system address on main bus line 1 30 YY Outdoor unit sub bus address 1 appears when there is only 1 outdoor unit Sample displays Mini VRF SYSTEM Outdoor Unit Maintenance Remote Controller non SET EA PROGRAM COPY 2 o m SET EJ B E 01 No of connected indoor units 02 Unit Nos 1 2 3 and 4 are 4 units connected connected Fig 3 5 Fig
111. t for OFF timer after operation starts Sets the DC fan tap according to the purpose of use sw DC fan tap setting Change the settings data at the same time Mini VRF SYSTEM 3 Remote Controller Servicing Functions Remote Controller Functions The remote controller includes a number of servicing functions Use these as needed for test runs and inspections List of Servicing Functions Operation with Press and hold the button forced thermostat ON for 4 seconds or longer Press and hold the A and buttons for 4 seconds or longer Press and hold the and Test run Sensor temperature display Temperature display from each sensor Current operation is maintained Servicing check display Simple settings Detailed settings Automatic address Address change Alarm history display Filter life time operating mode priority central control address and other settings System address indoor unit address central control address and other settings Automatic address setting based on command from the wired remote controller Change of indoor unit address SET buttons for 4 seconds or longer Press and hold the ED buttons for 4 seconds or longer Press and hold the A and buttons for 4 seconds or longer Press and hold the for 4 seconds or lon Press and hold the the timer operation Le buttons for 4 seconds or lon and A and the timer operation
112. t mask time The next defrost operation will not start until the defrost mask time 2 35 minutes has elapsed following the previous defrost operation L1 L2 The frost detection area is located under the thick lines While defrost control is in effect if all indoor units stop or if the outdoor unit is restarted after it was stopped for protective control or a similar reason then defrost control may start 3 4 5 General flow of reverse cycle defrost 1 General flow of reverse cycle defrost control Reverse cycle defrost control follows this flow process again after a minimum of 10 minutes Normal 1 minute Reverse cycle defrost 1 minute Normal operation stop control Max 12 minute stop operation Control time Max 12 minutes stops once before and after control Operates at a compressor frequency of 75 Outdoor nits The outdoor fan stops Hz Electronic control valve unit capacity Indoor All indoor units operate at a fixed pulse according to the indoor units Fan The fan stops 3 4 6 Defrost end judgment conditions Defrost ends when the below defrost end conditions are met Condition 1 Defrost end judgment occurs when the temperature at the temperature sensor installed on the outdoor heat exchanger is 50 F or higher or has been 42 8 F or higher continuously for 1 minute When the maximum defrost time shown in the table above occurs Condition 2 1 9 has
113. table model and installation pro cedure so that if the refrigerant accidentally leaks out its density does not reach the limit and in the event of an emergency measures can be made before injury can occur Do nat touch the air inlet or the sharp aluminum fins of the outdoor unit You may get injured AN os Ventilate any enclosed areas when installing or testing the refrigeration system Escaped refrigerant gas on contact with fire or heat can produce dangerously toxic gas Confirm after installation that no refrigerant gas is leaking If the gas comes in contact with a burning stove gas water heater electric room heater or other heat source it can cause the generation of poisonous gas Do nat touch the air inlet or the CAUTION sharp aluminum fins of the outdoor unit You may get injured Do not sit or step on the unit you may fall down accidentally Do not stick any object into the FAN CASE You may be injured and the unit may be damaged A ASHRAE and the International Mechanical Code of the ICC as well as CSA provide guidance and define safe guards related to the use of refrigerants all of which define a Refrigerant Concentration Level RCL of 25 pounds per 1 000 cubic feet for R410A refrigerant For additional guidance and precautions related to refrigerant safety please refer to the following documents International Mechanical Code 2009 IMC 2009 or more recently revised ASHRAE 15
114. tem address R C XX Outdoor unit system address YY Outdoor unit sub bus address Item codes 01 08 are displayed 01 indicates the most recent alarm The alarm history displays the alarm code If no alarm are present then is displayed To clear the alarm history press the button The outdoor unit alarm history will be cleared To exit press the CHECK button The display returns to the normal display Mini VRF SYSTEM Outdoor Unit Maintenance Remote Controller es mem CES PRocnaM COPY Mini VRF SYSTEM 6 Mode Settings Outdoor Unit Maintenance Remote Controller B Setting mode 1 Operating procedure D Press and hold the L CHECK button and ST VENTILATION button simultaneously for 4 seconds or longer Press the temperature setting LA and Ces buttons to change the item code The item codes and setting data are shown in the table below Press the timer time 4 and buttons to change the setting data amp Display of first 4 digits DORS JiCont a 3 E Ka Cr B To confirm the changed setting data press the button At this time RAHM stops blinking and remains lit During this mode fama is displayed blinking The outdoor unit address display section displays ALL the item code number DN value in the table and the setting data 8 di
115. uble or current detection trouble occurs at an inverter frequency of less than 80 Hz after start when trouble judgment current is detected in the primary or secondary current or when an instantaneous secondary current of 48 A or higher is detected Probable cause There is a strong possibility of a compressor failure An alarm occurs for current detection trouble when it is judged that no current is flowing after start DCCT is damaged In this case the cause is a DCCT failure Check Check the power wiring and connector wiring Correction It is possible to resolve this trouble by limiting the maximum frequency Example Notes P22 alarm Alarm code P22 Alarm meaning Fan motor trouble Alarm conditions Fan motor start failure fan motor Hybrid IC input failure Probable cause Possible causes are a Hybrid IC input circuit failure or a fan HIC failure Check Check the fan motor wiring the Hybrid IC wiring and the connector connections If the wiring and connectors are normal then check that the capacitor of the Hybrid IC input circuit is securely soldered onto the PCB Also use a tester and measure the resistance between fan HIC power HIC and ground HIC If there is a short circuit there is an HIC malfunction Correction If the fan does not start the below corrections may be effective 1 If there is a fan HIC failure or circuit failure replace the PCB
116. which have operation SC mode priority in 1 refrigerant circuit Non priority set remote controller L06 Group control wiring is connected to individual control indoor unit LO7 xt e xt Indoor unit address is not set L08 Capacity code of indoor unit is not set lt lt L09 gt gt i 4 way valve operation failure L18 Duplication of outdoor R C address setting L04 7 slo ix Capacity code of outdoor unit is not set L10 Activation of Protective device in indoor Thermal protector in indoor unit fan motor is activated lt lt P01 gt gt protective unit is activated Improper wiring connections of ceiling panel lt lt P09 gt gt 3 device Float switch is activated lt lt P10 gt gt l Continued s Mini VRF SYSTEM 1 Contents of Remote Controller Switch Alarm Display Trouble Diagnosis ON O Blinking Xf OFF e Wired Wireless remote remote controller control receiver display display Possible cause of malfunction Se a 9 aS in 128 CI E o iF i58 Activation of Protective device in outdoor Incorrect discharge temperature Comp P03 protective unit is activated Operation of O2 sensor P14 b i device Outdoor unit fan motor is unusual P22 Compressor running failure resulting from missing phase in the P16 Xt O Xt compressor wiring etc Start failure not caused by IPM or no gas i i Overcurrent at time of comp
117. xpansion valve operation failure 3 Compressor discharge sensor failure 5 Electrical noise Check 4 PCB failure A D conversion failure 1 Insufficient refrigerant Trouble Check Liquid effectiveness is poor Check whether or not the superheating temperature is declining if the evaporator mechanical valve is opened to 300 pulses or more after checking for foreign object intrusion 2 Sensor failure Check e This alarm is likely to occur when wiring is partially cut It can be difficult to identify even when conductivity is checked The detected discharge temperature is high e Although such conditions rarely occur a P02 alarm is likely if the detected discharge temperature is low e Replace the sensor with another discharge sensor and compare the temperature conditions 3 If the cause is still unknown after checking the above then it is possible that electrical noise is the cause of the trouble Correction 1 Replace the sensor 2 Replace the outdoor unit PCB 3 Correct the problem locations Example All of the probable causes Notes Operates continuously for a set length of time Indicates 2 minutes 30 seconds or longer for an inverter unit 4 Mini VRF Alarm Codes P16 alarm Mini VRF SYSTEM Trouble Diagnosis Alarm code P16 Alarm meaning Inverter compressor overcurrent alarm Alarm conditions This alarm occurs when current tro

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