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Gree GMV6 DC Inverter VRF Units Service Manual

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Appendix 6 Schematic Diagram

The outdoor unit of GMV6 multi VRF unit can be realized by parallel combination of modules, and

the indoor unit can also be composed of multiple units in parallel. The working principle is as follows:
when the indoor unit is running in the cooling mode, the outdoor unit starts the outdoor module according
to the running load demand of the indoor unit. The outdoor heat exchanger is used as the condenser of
the system, and the heat exchangers of indoor units are connected in parallel as the evaporator of system.
It realizes the adjustment of the air temperature and humidity for indoor space through the return air
circulation of the indoor unit; when the indoor unit is in the heating mode, all the four-way valves of the
outdoor unit module are switched to the energizing state, the outdoor heat exchanger is used as the
evaporator of the system and the heat exchanger of indoor unit is used as the condenser of the system.
The air temperature and humidity in the indoor space is realized by the return air circulation of the indoor
unit.
Working principle diagrams:
System principle diagram of GMV-224WM/G-X, GMV-280WM/G-X and GMV-335WM/G-X

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Summary of Contents for GMV6 Series

Page 1: ...GMV6 DC Inverter VRF Units GC202001 I Capacity 22 4kW 272 0kW Rated Frequency 50Hz 60Hz Operation Range Cooling 5 52 C Heating 30 24 C ...

Page 2: ...pter 4 Maintenance 183 1 Precautions for Refrigerant Leakage 183 2 Refrigerant Charging 183 3 Refrigerant Charging Method 185 4 Inspection of Key Parts 188 5 Replacement of Key Unit Parts 243 6 Explosive View and Parts List 277 Appendixes 283 Appendix 1 Temperature Senor Resistance and Temperature Relationship Table 283 Appendix 2 Refrigerant Temperature and Pressure Table 290 Appendix 3 Pressure ...

Page 3: ...functioning or damage to the air conditioning system or even personal injury Safety Instructions Warning symbols Symbols in this document indicate different severities and possibilities DANGER Indicates an imminently hazardous situation which if not avoided will result in death or serious injury WARNING Indicates a potentially hazardous situation which if not avoided could result in death or serio...

Page 4: ...79WM G X 20 62 18 22 22 GMV 1734WM G X 22 64 20 22 22 GMV 1790WM G X 24 66 22 22 22 GMV 1845WM G X 26 12 14 GMV 735WM G X 68 22 22 24 GMV 1910WM G X 28 12 16 GMV 785WM G X 70 22 24 24 GMV 1975WM G X 30 12 18 GMV 839WM G X 72 24 24 24 GMV 2040WM G X 32 10 22 GMV 895WM G X 74 12 18 22 22 GMV 2069WM G X 34 12 22 GMV 950WM G X 76 16 18 20 22 GMV 2129WM G X 36 14 22 GMV 1015WM G X 78 14 20 22 22 GMV 21...

Page 5: ...f compressor FV68H FV68H FV68H FV68H FV68H Refriger ation oil charge Gross L 4 6 4 6 4 6 6 1 6 1 Compressor charge L 1 1 1 1 1 1 1 1 1 1 The others L 3 5 3 5 3 5 5 5 Cooling operation range C 5 52 5 52 5 52 5 52 5 52 Heating operation range C 30 24 30 24 30 24 30 24 30 24 Refrigerant type R410A R410A R410A R410A R410A Refrigerant charge kg 5 5 5 5 5 7 7 7 5 Maximum drive IDU NO unit 13 16 19 23 26...

Page 6: ...0 830 1855 1400 830 1855 Net weight kg 295 350 350 355 Gross weight kg 310 365 365 370 2 2 Parameters of Combined Modules Model GMV 735WM G X GMV 785WM G X GMV 839WM G X GMV 895WM G X HP HP 26 28 30 32 Combination mode 12 14 12 16 12 18 10 22 GMV 335WM G X GMV 400WM G X GMV 335WM G X GMV 450WM G X GMV 335WM G X GMV 504WM G X GMV 280WM G X GMV 615WM G X Cooling capacity kW 73 5 78 5 83 9 89 5 Heati...

Page 7: ...0 24 7 22 0 29 0 Heating current input A 13 9 30 2 17 0 30 2 23 1 23 4 23 1 30 2 Rated power input kW 13 50 27 41 18 18 27 41 26 30 26 85 26 30 27 41 Rated current A 24 1 49 32 5 49 47 48 47 49 Cooling operation range C 5 52 5 52 5 52 5 52 Heating operation range C 30 24 30 24 30 24 30 24 Refrigerant type R410A R410A R410A R410A Refrigerant charge kg 5 7 8 3 7 8 3 8 8 8 8 3 Maximum drive IDU NO un...

Page 8: ...35WM G X GMV 615WM G X GMV 615WM G X Cooling capacity kW 139 9 145 5 151 0 156 5 Heating capacity kW 157 0 163 5 169 5 175 5 Outdoor static pressure Pa 0 110 0 110 0 110 0 110 Noise sound pressure level dB A 66 66 67 67 Power 380V 415V 3N 50Hz 60Hz 380V 415V 3N 50Hz 60Hz 380V 415V 3N 50Hz 60Hz 380V 415V 3N 50Hz 60Hz Cooling power input kW 7 7 12 3 13 8 6 2 13 8 16 2 6 2 16 2 16 2 7 7 16 2 16 2 Hea...

Page 9: ... drive IDU NO unit 77 80 80 80 Gas pipe mm Φ41 3 Φ41 3 Φ41 3 Φ41 3 Liquid pipe mm Φ19 05 Φ19 05 Φ19 05 Φ19 05 Outline dimensions W x D x H mm 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 Packing dimensions W x D x H mm 1400 830 1855 1400 830 1855 1400 830 1855 1400 830 1855 14...

Page 10: ...ise sound pressure level dB A 68 68 69 69 Power 380V 415V 3N 50Hz 60Hz 380V 415V 3N 50Hz 60Hz 380V 415V 3N 50Hz 60Hz 380V 415V 3N 50Hz 60Hz Cooling power input kW 7 7 12 3 16 2 16 2 10 8 12 3 13 8 16 2 9 2 13 8 16 2 16 2 9 2 16 2 16 2 16 2 Heating power input kW 7 8 12 9 16 9 16 9 10 7 12 9 13 1 16 9 9 5 13 1 16 9 16 9 9 5 16 9 16 9 16 9 Cooling current input A 13 8 22 0 29 0 29 0 19 3 22 0 24 7 2...

Page 11: ...3 8 3 8 8 3 8 3 8 3 8 8 3 8 3 8 3 Maximum drive IDU NO unit 80 80 80 80 Gas pipe mm Φ44 5 Φ44 5 Φ44 5 Φ44 5 Liquid pipe mm Φ22 2 Φ22 2 Φ22 2 Φ22 2 Outline dimensions W x D x H mm 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 16...

Page 12: ...690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 1340 775 1690 Packing dimensions W x D x H mm 1400 830 1855 1400 830 1855 1400 830 1855 1400 830 1855 1400 830 1855 1400 830 1855 1400 830 1855 1400 830 1855 1400 830 1855 1400 830 1855 1400 830 1855 1400 830 1855 1400 830 1855 1400 830 1855 ...

Page 13: ...reparation before commissioning Verification of installation Unit checking Commissioning 2 Safety Requirements WARNING Safety measures must be taken for outdoor operations All involved commissioning personnel and maintenance personnel must master the building construction safety regulations and strictly follow them Special workers like refrigeration workers electricians and welders must hold speci...

Page 14: ...ee GMV6 DC Inverter VRF Units Service Manual 12 3 Unit Commissioning 3 1 Preparation 3 1 1 Tools Name Picture Screwdrivers Spanner Hex key Pincers Vacuum pump Electronic balance Pressure gauge Multimeter ...

Page 15: ...ing meeting Minutes of the commissioning scheme determining meeting for XXX project Theme xxx Date xxx Place xxx Participants xxx Details xxx 1 2 3 Checklist of the commissioning system appearance Checklist of the equipment appearance of xxx air conditioning project Item Defect Inspector Time Refrigerating system Outdoor unit appearance Indoor unit appearance Copper pipe insulation Drainage system...

Page 16: ...indoor units Status Parameter Unit Before Startup 30 min 60 min Status parameters of the outdoor unit Outdoor ambient temperature C Power voltage V Frequency Hz Compressor current A Discharge temperature C High system pressure C Low system pressure C Parameters of indoor unit 1 Rated capacity kW Ambient temperature C Air position Position Temperature at the air outlet C Outlet airflow M S Noise dB...

Page 17: ... to outdoor units in other series GMV6 cannot be connected to outdoor units in other series 10 Does the drop between the indoor and outdoor units meet the unit design requirements 110 m with the outdoor unit up 110 m with the outdoor unit down 11 Does the drop between indoor units meet the unit design requirements 40 m 12 Is the length of the pipe from the outdoor unit to the farthest indoor unit ...

Page 18: ...roblem is solved 20 Is the outdoor unit being warmed up for more than 2 hours before commissioning Electrical system 21 Is the power cable connected correctly Is the terminal block secure 22 Is the power cable appearance in good condition and not exposed The appearance is in good condition and not exposed 23 Is the power capacity less than the maximum power of the unit The power capacity is not le...

Page 19: ...PVC pipe The parallel spacing between a communication cable and a strong current cable is greater than 20 cm Indoor unit installation 38 Does the indoor unit drain pipe have a slope of 1 100 39 Does the height of the indoor unit riser drain pipe meet the requirements 40 Does the indoor unit drain smoothly 41 Is there a U shaped trap for indoor unit drainage 42 Is there a soft joint at the air outl...

Page 20: ...hether the preheating is normal by hand Debugging can be started up only when the preheating is normal otherwise the compressor may be damaged 10 When starting up the debugging the system automatically selects the operating mode according to the current ambient temperature 11 When debugging the front panel of the outdoor unit must be completely closed otherwise it will affect the accuracy of debug...

Page 21: ...xample if the system receives a commissioning pause signal when performing step 10 Main pipeline status detection before startup the system returns to the waiting phase after step 9 Refrigerant detection before startup Commissioning resume In commissioning pause status press the SW4 back button on the master unit to continue to perform commissioning 3 2 2 3 Display instruction for each stage progr...

Page 22: ...m has detected the fault of outdoor unit components db ON 06 ON OC ON The system detected that there s no outdoor unit fault Enter into the next step automatically 07_indoor unit componets inspection db ON 07 ON XXXX cor respoding error code ON The system detected an indoor unit fault XXXX indicates engineering number of fault indoor unit and the corresponding fault code is displayed 2s later For ...

Page 23: ...Error code U8 is displayed after 2s For example if the U8 fault occurs in the No 100 indoor unit LED3 displays as follows 01 after 2s 00 after 2s U8 and they will be displayed circularly Note In the pilot run stage the unit will display corresponding procedures according to actual circumstances When master module displays as below the complete unit has conducted the debugging and it stays at the s...

Page 24: ...esponding fault is displayed in step 01 Debugging code Progress code Status code Meaning Progress LED1 LED2 LED3 Code Display status Code Display status Code Display status 01_ set up master unit db ON 01 ON CC ON Mater module hasn t been set in the system It needs to reset it db ON 01 ON CF ON More than two master modules are set in the system and it needs to reset it db ON 01 ON OC ON Mater modu...

Page 25: ... display the display is as follows if press SW3 button within 30s the display is as follows The unit automatically enters the next step of debugging Debugging code Progress code Status code Progress LED1 LED2 LED3 Code Display status Code Display status Code Display status 04_indoor unit quantity confirmation db ON 04 ON OC ON Note It is important to confirm that the number of online indoor unit m...

Page 26: ...ly enters the next step of detection Debugging code Progress code Status code Meaning Progress LED1 LED2 LED3 Code Display status Code Display status Code Display status 06_outdoor unit s parts inspection db ON 06 ON OC ON The system detected that there s no fault for outdoor unit s parts Then it will automatically enter into the next step If an abnormality is detected it will stay in the current ...

Page 27: ...tep 11 The debugging step 08 is compressor preheat confirmation If the preheat time has reached for 2h the display is as below Then it will enter into the next step for inspection Debugging code Progress code Status code Meaning Progress LED1 LED2 LED3 Code Display status Code Display status Code Display status 08_compressor preheat confirmation db ON 08 ON OC ON Compressor s preheat time has reac...

Page 28: ...normal status the display is as below Debugging code Progress code Status code Meaning Progress LED1 LED2 LED3 Code Display status Code Display status Cod e Display status 10_ status judgment of main pipeline before starting db ON 10 ON U6 ON Main pipeline is abnormal At this time it is necessary to check whether the gas valve and the liquid valve are completely open or whether the main pipeline i...

Page 29: ...peline or valve is abnormal db ON 13 14 1 5 ON XXXX U8 ON The system detected the indoor unit s pipeline is abnormal XXXX indicates engineering number of fault indoor unit 2s later U8 fault occurred for No 100 indoor unit LED3 will display as below 01 2s later 00 2s later U8 and it will display like that circularly Note In the pilot run stage the unit will display corresponding procedures accordin...

Page 30: ...mode 0 represents 0 Pa outdoor static pressure mode 1 represents 30 Pa mode 2 represents 50 Pa mode 3 represents 80 Pa and mode 4 represents 110 Pa Each basic module can be set separately or uniformly by the master module When basic modules are set separately the static pressure value of each module can be different when the modules are set uniformly the static pressure value of each module remain...

Page 31: ...n 00 Blinks Press the SW1 up button and the SW2 down button to select the corresponding static pressure mode for the outdoor unit LED1 LED2 LED3 Function code Display status Mode Display status Current status Display status 1G On ADD On 00 Blinks 1G On ADD On 01 Blinks 1G On ADD On 02 Blinks 1G On ADD On 03 Blinks 1G On ADD On 04 Blinks After selecting the corresponding static pressure mode for th...

Page 32: ...k Start to enter the commissioning function Click Start to enter the commissioning function and the software automatically performs commissioning indicates that commissioning is being performed on the phase and indicates that commissioning is passed on the phase ...

Page 33: ...firm or wait for 30 seconds to go to the next process If the displayed number of online units is inconsistent with the actual number in the project manual check and commissioning again are required for confirmation Click to display relevant information detected on this phase which provides references for selection Click Close to close the information the number of commissioning units is displayed ...

Page 34: ...gure below If the system currently detects that all the basic modules have been continuously powered on for 2 hours or more or the previous time when the modules were powered on for 2 hours or more is less than 2 hours from the current time preheat is completed and the system can proceed to the next process Otherwise the system prompts UO insufficient compressor preheat time ...

Page 35: ...e phase and troubleshooting is required after troubleshooting the unit automatically enters the next step if no OK exists or click OK to enter the next step Click to display relevant information detected on this phase which provides references for troubleshooting Click Close to close the information ...

Page 36: ... till commissioning ends Back and Skip are provided in 10 ODU valves check before startup When an exception occurs in step 10 click Back to return to step 9 and then click OK in step 9 to perform commissioning again for step 10 If a U6 fault valve exception occurs in step 10 users can click Skip to skip the fault For other faults Skip is unavailable ...

Page 37: ...vice Manual 35 In step 11 Select charging method the system automatically selects manual or auto charging mode You can directly choose manual charging If no operation is performed within 3 minutes manual charging is automatically entered ...

Page 38: ...ting When the system runs for 60 minutes without exception it determines that the refrigerant is normal the unit is shut down and the commissioning is completed Alternatively after staying for 65 minutes in the process the commissioning is exited and completed The interface after the commissioning is shown below Debugging completed indicates that the commissioning is completed and the system enter...

Page 39: ... Using Multi functional Debugger Step 1 Connect multi functional debugger For details see the user manual of multi functional debugger Step 2 Set the address DIP switch SA8 of the master outdoor unit to 00 Otherwise it is invalid Step 3 Click Unit Debug on the home page to enter the commissioning page Step 4 On the commissioning page click Startup to start commissioning or click Stoppage to stop c...

Page 40: ... the product is used the cable connection of the air conditioner unit must be recovered Otherwise the actual use will be affected 3 2 6 After Commissioning Organize and save the data Make complete and detailed records of exceptions and corresponding solutions in the commissioning process for future maintenance and query Finally export the commissioning report and hand it over to the user After the...

Page 41: ...2 C 6 Temperature of the defrosting temperature sensor C When the system operates in cooling mode the temperature of the defrosting temperature sensor is 5 C to 11 C lower than the high system pressure When the system operates in heating mode the difference between the temperature of the defrosting temperature sensor and the low system pressure is about 2 C 7 High system pressure C The normal high...

Page 42: ...alue and the above calculated value within 15 V is normal 14 Indoor unit parameters Inlet pipe temperature of the indoor heat exchanger C Based on the ambient temperature the inlet pipe temperature of the same indoor unit in cooling mode is 1 C to 7 C lower than the outlet pipe temperature In heating mode the inlet pipe temperature of the same indoor unit is 10 C to 20 C lower than the outlet pipe...

Page 43: ...SA8 DIP switch must be reset in the project SA1 DIP switch cannot be changed The default settings of other DIP switches do not need to be changed if there are no special requirements 4 1 1 Unit Capacity DIP Switch SA1_capacity This DIP switch is set by the factory before shipment and cannot be changed Otherwise the system will work abnormally and even damage the compressor 4 1 2 Address DIP Switch...

Page 44: ...off state in a refrigerating system The setting method is as follows Master Module Setting DIP Switch SA8_MASTER S DIP1 DIP2 Remarks 0 0 Master module 1 0 Submodule When delivered all modules are in 00 master module status by default When multiple modules are connected in parallel only one module remains in master module status and other modules are set to submodule status When a module is used in...

Page 45: ...nd b submodules White lever position White lever position ON 0 0 SA8_MASTER S White lever position White lever position ON 1 0 SA8_MASTER S 4 2 System Function Operations CAUTIONS System function settings and queries must be performed after the entire system is commissioned System function settings and queries can be performed regardless of whether the entire system is running or not 4 2 1 Functio...

Page 46: ...only be set n0 Auto energy saving This function can automatically reduce power consumption of the unit based on system operating parameters 01 Capability priority control This function can be set and queried n3 Forced defrosting This function forcibly enables defrosting of the outdoor unit of the system This function can only be set n4 Forced energy saving This function forcibly reduces the maximu...

Page 47: ...ence A6 Blinks 00 Blinks 00 Blinks Cooling heating of the entire system A2 Blinks 00 Blinks 00 Blinks Refrigerant recycle A8 Blinks 00 Blinks 00 Blinks After sales vacuum pumping n0 Blinks 01 Blinks 00 Blinks Auto energy saving n3 Blinks 00 Blinks 00 Blinks Forced defrosting n4 Blinks 00 Blinks 00 Blinks Forced energy saving n5 Blinks 00 Blinks 00 Blinks Indoor unit engineering SN offset IG Blinks...

Page 48: ...links 00 Blinks Continuous heating 1F Blinks 00 Blinks 00 Blinks SRL low pressure control 1G Blinks 00 Blinks 00 Blinks Outdoor static pressure setting 1H Blinks 00 Blinks 00 Blinks Efficient module rotation 4n Blinks 00 Blinks 00 Blinks Adaptive control of noise 4q Blinks 00 Blinks 00 Blinks Forced switch of the electric heater of an indoor unit 5L Blinks 00 Blinks 00 Blinks Fan reverse dust remo...

Page 49: ...e mode Press SW3 to confirm the selected mode Press the SW4 back button on the master module to return to the previous process or exit the function setting status If you do not press any button in 5 minutes the system will automatically exit the current screen and the unit will resume displaying the current status Indoor unit pipeline refrigerant recycle Step 3 Select 01 in step 2 to enter indoor ...

Page 50: ...ster module to return to the previous process or exit the function setting status Note Before the refrigerant recycle of a basic module the liquid pipe stop valve of the basic module must be closed After refrigerant recycle the system cannot be restarted within 10 minutes 4 2 3 2 A6 Cooling Heating of the Entire System Introduction This function sets the cooling heating mode of the entire system A...

Page 51: ...ooling and heating mode 4 2 3 3 A7 Outdoor Silence Mode Introduction This function is mainly used in scenarios where the user requires low ambient noise Smart night silence mode and forced silence mode are available In smart night silence mode the highest ambient temperature during the day is automatically determined and then silent operation is entered after a certain duration to ensure low noise...

Page 52: ...ED1 LED2 LED3 Function code Display status Silence mode code Display status Current status Display status A7 On 00 Blinks OC Blinks A7 On 01 Blinks OC Blinks A7 On 02 Blinks OC Blinks A7 On 03 Blinks OC Blinks A7 On 04 Blinks OC Blinks A7 On 05 Blinks OC Blinks A7 On 06 Blinks OC Blinks A7 On 07 Blinks OC Blinks A7 On 08 Blinks OC Blinks A7 On 09 Blinks OC Blinks A7 On 10 Blinks OC Blinks A7 On 11...

Page 53: ...and all modules display as follows LED1 LED2 LED3 Function code Display status Current process Display status Current status Display status A8 On 00 On OC On At this time the expansion valves of all indoor and outdoor units are open and the entire system cannot be started When you press the SW4 back button on the master unit for over 5 seconds or the vacuum pumping status remains for 24 hours the ...

Page 54: ...osting the system automatically exits according to the exit conditions and then automatically runs according to the system conditions Setting steps Step 1 Enter n3 forced defrosting and ensure that the master unit displays as follows LED1 LED2 LED3 Function code Display status Current process mode Display status Current status Display status n3 On 00 Blinks 00 Blinks Step 2 Press the SW3 confirm b...

Page 55: ... On 09 On OC On n4 On 08 On OC On If you do not press any button on the master unit in 5 minutes the system will automatically exit the current screen and the unit will resume displaying the current status During setting press SW4 to return to the previous process If the setting is completed press SW4 to resume the unit to the current normal working status 4 2 3 8 n5 Indoor Unit Engineering SN Off...

Page 56: ...on code Display status Current process Display status Current status Display status 3P On 01 Blinks OC Blinks Press the SW1 up button and the SW2 down button to select the corresponding basic module 00 means all modules 01 04 means module 1 to module 4 LED1 LED2 LED3 Function code Display status Current process Display status Current status Display status 1G On 00 Blinks OC Blinks 1G On 01 Blinks ...

Page 57: ... LED3 Function code Display status Current module Display status One button drainage code Display status qJ On OF Blinks 00 On Press the SW1 up button and the SW2 down button to select the corresponding status and press the SW3 confirm button LED1 LED2 LED3 Function code Display status Current module Display status One button drainage code Display status qJ On on or OF On oC On After the setting i...

Page 58: ...fter selecting the corresponding value press the SW3 confirm button All modules display as follows LED1 LED2 LED3 Function code Display status Mode Display status Current status Display status C8 On 00 On OC On C8 On 01 On OC On C8 On 02 On OC On The basic module memorizes this setting and does not clear it even upon power failure and power on again The default value is 00 Then press the SW4 back ...

Page 59: ...s LED1 LED2 LED3 Description Function code Display status Current process Display status Current status Display status C9 On 00 Blinks OC Blinks Fans 1 and 2 run normally C9 On 01 Blinks OC Blinks The operation of fan 1 is shielded C9 On 02 Blinks OC Blinks The operation of fan 2 is shielded After selecting the corresponding value press the SW3 confirm button All modules display as follows LED1 LE...

Page 60: ...ter the function setting on the main board of the faulty basic module The module displays as follows LED1 LED2 LED3 Function code Display status Current process Display status Current status Display status CA On 00 Blinks OC Blinks Press the SW1 up button and the SW2 down button to select the corresponding module to enter and exit emergency operation status LED1 LED2 LED3 Description Function code...

Page 61: ...ion status If it exceeds 48 hours the entire system is stopped and the indoor unit displays the Ad limit operation code 4 2 3 14 1b Adaptive Control of Weather Parameters Setting steps Enter the function setting The master unit displays as follows by default and other basic modules display normal working status LED1 LED2 LED3 Function code Display status Current process Display status Current stat...

Page 62: ...firm button The master module displays as follows LED1 LED2 LED3 Function code Display status Current process Display status Current status Display status 1C On 00 On OC On 1C On 01 On OC On The master unit memorizes this setting and does not clear it even upon power failure and power on again The default value is 00 4 2 3 16 1F SRL Low Pressure Control Setting steps Enter the function setting The...

Page 63: ... rotation 1H On 01 Blinks OC Blinks Ordinary module rotation After selecting the corresponding value press the SW3 confirm button The master module displays as follows LED1 LED2 LED3 Function code Display status Mode Display status Current status Display status 1H On 00 On OC On 1H On 01 On OC On The master unit memorizes this setting and does not clear it even upon power failure and power on agai...

Page 64: ...s OC Blinks Press the SW1 up button and the SW2 down button to select the corresponding low pressure control mode LED1 LED2 LED3 Description Function code Display status Current process Display status Current status Display status 4q On 00 Blinks OC Blinks Invalid forced off function of the electric heater of an indoor unit 4q On 01 Blinks OC Blinks Forced off of the electric heater of an indoor u...

Page 65: ...n OC On 5L On 02 On OC On The master unit memorizes this setting and does not clear it even upon power failure and power on again The default value is 00 Mode 00 indicates the fan reverse dust removal function is turned off 01 indicates fan reverse dust removal mode 1 and 02 indicates mode 2 4 2 3 21 5n Fan Anti Snow Setting steps Enter the function setting The master unit displays as follows by d...

Page 66: ... there are two levels of menus you can press the SW4 back button to return to the previous level Press the SW4 query button again to exit query status In function query status if you do not press any button on the master unit in 5 minutes the system will automatically exit the current screen and the unit will resume displaying the current status 4 2 4 1 n6 Fault Query Press the SW1 up button and t...

Page 67: ...1 31 Inverter outdoor fan phase loss protection 13 Shell roof high temperature protection for compressor 2 32 Inverter outdoor fan driver module reset 14 Under voltage protection for the DC bus of inverter compressor driver 33 Inverter outdoor fan over current protection 15 Over voltage protection for DC bus of the inverter compressor driver 34 Current detection circuit fault of the inverter outdo...

Page 68: ...plays the specific value The parameters and display sequence are listed below Outdoor ambient temperature master module is displayed by default Press the SW1 up button and the SW2 down button to select the corresponding query parameter value Parameter Code Parameter Name Remarks 01 Outdoor ambient temperature Outdoor ambient temperature of the master module is used 02 Operating frequency of compre...

Page 69: ... condenser 33 Outlet pipe temperature of the condenser Note If a parameter value is negative LED3 circularly displays negative value code nE and the numerical value every 1 second For example for 30 LED3 circularly displays nE for 1 second and 30 Discharge temperature and ambient temperature values are in four digits The LED circularly displays the left two digits and then the right two digits For...

Page 70: ...lly exit the current screen and the unit will resume displaying the current status 4 2 4 4 n9 Online Indoor Unit Qty Query Introduction This function directly uses the outdoor unit to query the quantity of online indoor units Operations In n9 online indoor unit qty query status the module displays as follows LED1 LED2 LED3 Function Code Display status Current process mode Display status Current st...

Page 71: ...W2 down button to select the barcode sequence The displayed sequence is as follows Unit barcode digits 1 13 controller barcode digits 1 13 that is unit barcode head unit barcode digits 1 6 unit barcode digits 7 12 unit barcode digit 13 controller barcode head controller barcode digits 1 6 controller barcode digits 7 12 controller barcode digit 13 The LEDs display as follows LED1 LED2 LED3 Paramete...

Page 72: ...ver 10 seconds to restore the system default settings All modules display as follows LED1 LED2 LED3 Meaning Address code Display status Function code Display status Status code Display status Restoration to default settings 1 ADD On 01 On 0C Blinks for 3 seconds At this time the system clears all settings including engineering numbers of the indoor and outdoor units quantities of the indoor and ou...

Page 73: ...ng numbers of the indoor and outdoor units quantities of the indoor and outdoor units and commissioning completion status 4 4 Fire Alarm Function Setting The VRF unit system reserves a fire alarm interface CN44 which connects with the external fire alarm system In case of an external fire the unit urgently shuts down for protection based on the received signal Then the unit enters the standby stat...

Page 74: ...emperature sensor d7 Malfunction of humidity sensor d8 Malfunction of water temperature sensor d9 Malfunction of jumper cap dA Web address of IDU is abnormal dH PCB of wired controller is abnormal dC Setting capacity of DIP switch code is abnormal dL Malfunction of air outlet temperature sensor dE Malfunction of indoor CO2 sensor dF Malfunction of upper water temperature sensor of water tank dJ Ma...

Page 75: ... current protection of compressor 5 J6 Over current protection of compressor 6 J7 Gas mixing protection of 4 way valve J8 High pressure ratio protection of system J9 Low pressure ratio protection of system JA Protection because of abnormal pressure JC Water flow switch protection JL Protection because high pressure is too low JE Oil return pipe is blocked JF Oil return pipe is leaking b1 Malfuncti...

Page 76: ...gh temperature protection of fan H9 Desynchronizing protection of inverter fan HA Malfunction of drive storage chip of inverter outdoor fan HH High voltage protection of fan s drive DC bus bar HC Malfunction of current detection circuit of fan drive HL Low voltage protection of bus bar of fan drive HE Phase lacking of inverter fan HF Malfunction of charging loop of fan drive HJ Failure startup of ...

Page 77: ...e matching ratio of rated capacity for IDU and ODU is too low CE Communication malfunction between mode exchanger and IDU CF Malfunction of multiple main control units CJ Address DIP switch code of system is shocking CP Malfunction of multiple wired controller CU Communication malfunction between IDU and the receiving lamp Cb Overflow distribution of IP address Cd Communication malfunction between...

Page 78: ...indoor unit and receiver of indoor unit display Fault diagnosis This is a status code It indicates that the system has entered refrigerant recycle running state and will automatically start Possible causes Troubleshooting not required 2 3 A3 Defrosting State Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis This is a status...

Page 79: ...tatus code It indicates that the system has entered silent mode settings state Possible causes Troubleshooting not required 2 7 A8 Vacuum Pumping Mode Fault display main board of outdoor unit displays Fault diagnosis This is a status code It indicates that the system has entered vacuum pumping mode and relevant expansion valves and solenoid valves will open Possible causes Troubleshooting not requ...

Page 80: ...n Prompt Fault display wired controller of indoor unit and receiver of indoor unit display Applicable models all indoor units Fault diagnosis This is a status code It indicates that the filter of indoor unit needs to be cleaned The cleaning interval of filter can be set according to actual circumstances Possible causes Troubleshooting Clean the filter and remove the prompt to have the filter proce...

Page 81: ...outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis This is a status code It indicates that an emergency running state has been set for the system but the unit is not allowed to perform emergency running because the emergency running has reached the time limit Possible causes Troubleshooting not required 2 17 b1 Outdoor Ambient Temperature Sensor Fault ...

Page 82: ...erly Yes Replace the main control board 2 18 b2 Defrosting Temperature Sensor 1 Fault Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 30 consecutive seco...

Page 83: ...rly Yes Replace the main control board 2 19 b3 Defrosting Temperature Sensor 2 Fault Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 30 consecutive secon...

Page 84: ... Replace the main control board 2 20 b4 Subcooler s Liquid Outlet Temperature Sensor Fault Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 30 consecutive...

Page 85: ...erly Yes Replace the main control board 2 21 b5 Subcooler s Gas Outlet Temperature Sensor Fault Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 30 consec...

Page 86: ...mproperly Yes Replace the main control board 2 22 b6 Suction Temperature Sensor 1 Fault Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 30 consecutive se...

Page 87: ...rly Yes Replace the main control board 2 23 b7 Suction Temperature Sensor 2 Fault Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 30 consecutive seconds ...

Page 88: ...perly Yes Replace the main control board 2 24 b8 Outdoor Humidity Sensor Fault Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 30 consecutive seconds the...

Page 89: ...ace the main control board 2 25 b9 Heat Exchanger s Gas Outlet Temperature Sensor Fault Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 30 consecutive se...

Page 90: ... improperly Yes Replace the main control board 2 26 bA Oil Return Temperature Sensor Fault Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 30 consecutive...

Page 91: ... indoor unit or between the indoor unit and wired controller for 30 seconds and a fault is generated Possible causes Communication cables are connected wrongly or get loose Communication cables are broken Poor contact of communication cables Number of wired controllers connected or addresses are set improperly Controller operates improperly Troubleshooting If the main control board of outdoor unit...

Page 92: ...nication cables are properly connected Whether the contact between the communication cable and terminal block is poor Yes No Make sure that no more than two wired controllers are connected to the indoor unit at the same time when two wired controllers are connected to the indoor unit at the same time make sure they are assigned with different addresses when one wired controller is connected to the...

Page 93: ...place the main control board Whether the outdoor unit s compressor drive board is normal Yes 2 29 C3 Communication Fault Between the Primary Controller and Inverter Fan Driver Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis When the outdoor unit fails to detect inverter fan driver for 30 consecutive seconds the fault is g...

Page 94: ...main control board may be abnormal Yes Replace the main control board Whether the outdoor unit s fan drive board is normal Yes 2 30 C4 Indoor Unit Loss Fault Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis When the unit identifies that more than three indoor units are disconnected it will stop for protection Possible caus...

Page 95: ...e numbers generate the same fault However the fault is displayed and required to be removed only when the commissioning software centralized controller and remote monitoring are connected In the case of non centralized control the conflict in terms of the engineering SNs of some indoor units if any do not affect the operation of themselves and of the entire system Possible causes The same engineer...

Page 96: ...nits No Connect the communication cables properly The main control board may be abnormal Yes Replace the main control board Yes Whether the communication cables among all the modules are connected reliably 2 33 C8 Emergency Operation of Compressor Fault display main board of outdoor unit displays Fault diagnosis If any compressor is set to emergency operation mode the main board displays the code ...

Page 97: ... total rated capacity of outdoor units exceeds 1 35 the unit will stop operation and display the fault Possible causes The total rated capacity of the indoor units exceeds 1 35 times of the total rated capacity of the outdoor units Troubleshooting Re engineer the unit to decrease indoor unit capacity or increase outdoor unit capacity 2 37 CL Too Low Rated Capacity Ratio Fault display main board of...

Page 98: ...power on the redialed modules again No Properly connect the communication cable and make sure that it is in the same network with other modules The main control board may be abnormal Yes Replace the main control board Yes Whether DIP switch is dialed properly for the master unit SA8 among all the modules in the network Whether the communication cables for the modules of the master unit by dialing ...

Page 99: ... is allowed in the network If two or more master units DIP switches SA2 are detected to be master unit s DIP switches in the network that is SA2 DIP switch is 00000 the fault of multiple master units is reported Possible causes If two or more master units DIP switches SA2 are detected to be master unit s DIP switches keep only one master unit s DIP switch SA2 to be 00000 and other master units DIP...

Page 100: ...door units enter the wired controller parameter settings P13 to set the address of one of the wired controllers to be 02 that is to be the secondary wired controller 2 42 Cb IP Address Assignment Overflow Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis If more than four addresses are assigned to other outdoor units by the...

Page 101: ... units is 100 engineering customization is required 2 43 d1 Poor Indoor Circuit Board Fault display wired controller of indoor unit and receiver of indoor unit display Fault diagnosis Check whether the address chip and memory chip of the indoor unit s main board can be read properly If not the fault is generated Possible causes Abnormal address chip Abnormal memory chip Troubleshooting Replace the...

Page 102: ...ets loose or contains foreign matters No 2 45 d4 Inlet Pipe Temperature Sensor Fault Fault display wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 5 consecutive seconds the fault is generated Po...

Page 103: ...reign matters No 2 46 d5 Middle Part Temperature Sensor Fault Reserved 2 47 d6 Outlet Pipe Temperature Sensor Fault Fault display wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 5 consecutive se...

Page 104: ...t pipe temperature sensor gets loose or contains foreign matters No 2 48 d7 Humidity Sensor Fault Fault display wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 5 consecutive seconds the fault is...

Page 105: ...r the interface terminal between the main board and humidity sensor gets loose or contains foreign matters No 2 49 d8 Water Temperature Sensor Fault Reserved 2 50 d9 Jumper Cap Fault Fault display wired controller of indoor unit and receiver of indoor unit display Fault diagnosis A fault is reported if the jumper cap does not match the main board Possible causes The jumper cap is not installed The...

Page 106: ...Fault display wired controller of indoor unit and receiver of indoor unit display Fault diagnosis Check the indoor unit s address chip and IP address If the address chip cannot be read the indoor unit s IP address is 0 and IP addresses conflict the fault is generated Possible causes Outdoor units address are assigned incorrectly Indoor unit s processing error Abnormal address chip Troubleshooting ...

Page 107: ...s Troubleshooting No dH Abnormal Circuit Board of Wired Controller Install the keypad and display panel respectively The IIC may be in poor contact with related components due to moisture or corrosion etc Yes Replace the wired controller Whether the touch keypad of the wired controller is well connected to the display panel Yes 2 53 dC Abnormal Settings of DIP Switch for Capacity Fault display wir...

Page 108: ...emperature sensor and determines the range of AD value When the sampled AD value exceeds the limits for 5 consecutive seconds the fault is generated Possible causes Poor contact between the air outlet temperature sensor and the main board interface Abnormal air outlet temperature sensor Abnormal detection circuit Troubleshooting Yes dL Air Outlet Temperature Sensor Fault Remove the foreign matters...

Page 109: ...utdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis When the high pressure sensor detects that the temperature at the high pressure is greater than 65 C or the high pressure switch is disconnected it indicates that the high pressure is too high and the unit will stop running to ensure safe operation Possible causes Check valve of the outdoor unit is clos...

Page 110: ...and the main board Check the swing motor and input signal Replace the main control board Clean the pipes to avoid s hort circuit Reinstall the outdoor unit s panel Fully open the check valve of the outdoor unit Whether the high pressure switch operates properly Replace the main board of outdoor unit Replace the high pressure switch Yes No No No No No No No No Yes No Yes Yes Yes Yes Yes Yes Yes No ...

Page 111: ...10 C it indicates that the unit operates improperly Solution First make sure that the EXV coil is connected properly and then power off the unit Power on to reset the unit and check the resetting action If unable to reset the unit replace the coil or the main board If able to reset the unit normally despite the problem replace the electronic expansion valve Check whether the electronic expansion v...

Page 112: ... of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The low pressure sensor detects the compressor s suction pressure When the saturation temperature corresponding to the low pressure is below 41 C the unit stops to ensure safe operation Possible causes Check valve of the outdoor unit is closed Abnormal low pressure sensor Abnormal outdoor or indoor...

Page 113: ...oor and outdoor electronic expansion valves work properly Is the air return filter of the indoor unit clogged with dirt The unit pipes are clogged Clean the filter Replace the electronic expansion valve or the main board Set the rated capacity of the indoor unit within the allowable range Check the input signal of the swing motor and the main board and replace the swing motor or the main board Che...

Page 114: ...the coil or the main board If able to reset the unit normally inspect other parts of the unit Step 3 Power on the units based on the capacity and number of indoor units enabled previously in the case of protection state Observe whether the indoor and outdoor fans are operating properly according to the rotational speed displayed by the commissioning software If not replace the motor or motor drive...

Page 115: ...outdoor unit can be read properly If not the fault is generated Possible causes Abnormal address chip Abnormal memory chip Abnormal clock chip Troubleshooting Yes No F0 Poor Main Board of the Outdoor Unit Whether system clock exception is also generated check by using the commissioning software Replace the CPU small board No Replace the compressor drive board Address chip and memory chip are abnor...

Page 116: ...sor and the main board interface Poor contact between high pressure sensor and part where the pressure is detected Abnormal high pressure sensor Abnormal sensor detection circuit Troubleshooting Yes No F1 High Pressure Sensor Fault Remove the foreign matters and plug it tightly Yes The detection circuit may operate improperly Yes Replace the main control board Whether there is poor contact between...

Page 117: ...d the main board interface Poor contact between low pressure sensor and part where the pressure is detected Abnormal low pressure sensor Abnormal low pressure sensor detection circuit Troubleshooting Yes No F3 Low Pressure Sensor Fault Remove the foreign matters and plug it tightly Yes The detection circuit may operate improperly Yes Replace the main control board Whether there is poor contact bet...

Page 118: ...eeds the limits for 30 consecutive seconds the fault is generated Possible causes Poor contact between the discharge temperature sensor and the main board interface Abnormal discharge temperature sensor Abnormal detection circuit Troubleshooting Yes F5 Discharge Temperature Sensor Fault of Compressor 1 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Yes ...

Page 119: ...eeds the limits for 30 consecutive seconds the fault is generated Possible causes Poor contact between the discharge temperature sensor and the main board interface Abnormal discharge temperature sensor Abnormal detection circuit Troubleshooting Yes F6 Discharge Temperature Sensor Fault of Compressor 2 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Yes ...

Page 120: ...eeds the limits for 30 consecutive seconds the fault is generated Possible causes Poor contact between the discharge temperature sensor and the main board interface Abnormal discharge temperature sensor Abnormal detection circuit Troubleshooting Yes F7 Discharge Temperature Sensor Fault of Compressor 3 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Yes ...

Page 121: ...eeds the limits for 30 consecutive seconds the fault is generated Possible causes Poor contact between the discharge temperature sensor and the main board interface Abnormal discharge temperature sensor Abnormal detection circuit Troubleshooting Yes F8 Discharge Temperature Sensor Fault of Compressor 4 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Yes ...

Page 122: ...eeds the limits for 30 consecutive seconds the fault is generated Possible causes Poor contact between the discharge temperature sensor and the main board interface Abnormal discharge temperature sensor Abnormal detection circuit Troubleshooting Yes F9 Discharge Temperature Sensor Fault of Compressor 5 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Yes ...

Page 123: ...eeds the limits for 30 consecutive seconds the fault is generated Possible causes Poor contact between the discharge temperature sensor and the main board interface Abnormal discharge temperature sensor Abnormal detection circuit Troubleshooting Yes FA Discharge Temperature Sensor Fault of Compressor 6 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Yes ...

Page 124: ...ve seconds the fault is generated Possible causes Poor contact between the circuit sensor and the main board interface Abnormal small board of circuit sensor Abnormal detection circuit Troubleshooting Yes FH Abnormal Current Sensor of Compressor 1 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Yes Replace the main control board No Whether the interface ...

Page 125: ...ve seconds the fault is generated Possible causes Poor contact between the circuit sensor and the main board interface Abnormal small board of circuit sensor Abnormal detection circuit Troubleshooting Yes FC Abnormal Current Sensor of Compressor 2 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Yes Replace the main control board No Whether the interface ...

Page 126: ...ve seconds the fault is generated Possible causes Poor contact between the circuit sensor and the main board interface Abnormal small board of circuit sensor Abnormal detection circuit Troubleshooting Yes FL Abnormal Current Sensor of Compressor 3 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Yes Replace the main control board No Whether the interface ...

Page 127: ...ve seconds the fault is generated Possible causes Poor contact between the circuit sensor and the main board interface Abnormal small board of circuit sensor Abnormal detection circuit Troubleshooting Yes FE Abnormal Current Sensor of Compressor 4 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Yes Replace the main control board No Whether the interface ...

Page 128: ...ve seconds the fault is generated Possible causes Poor contact between the circuit sensor and the main board interface Abnormal small board of circuit sensor Abnormal detection circuit Troubleshooting Yes FF Abnormal Current Sensor of Compressor 5 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Yes Replace the main control board No Whether the interface ...

Page 129: ...ve seconds the fault is generated Possible causes Poor contact between the circuit sensor and the main board interface Abnormal small board of circuit sensor Abnormal detection circuit Troubleshooting Yes FJ Abnormal Current Sensor of Compressor 6 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Yes Replace the main control board No Whether the interface ...

Page 130: ...eds the limits for 30 consecutive seconds the fault is generated Possible causes Poor contact between the shell roof temperature sensor and the main board interface Abnormal shell roof temperature sensor Abnormal detection circuit Troubleshooting Yes FU Shell Roof Temperature Sensor Fault of Compressor 1 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Ye...

Page 131: ...eds the limits for 30 consecutive seconds the fault is generated Possible causes Poor contact between the shell roof temperature sensor and the main board interface Abnormal shell roof temperature sensor Abnormal detection circuit Troubleshooting Yes Fb Shell Roof Temperature Sensor Fault of Compressor 2 Remove the foreign matters and plug it tightly The detection circuit may operate improperly Ye...

Page 132: ... of the main control board of the outdoor unit displays HF Loss of synchronization protection for the inverter fan 2 digit digital LED of the main control board of the outdoor unit displays H9 Inverter fan startup failure 2 digit digital LED of the main control board of the outdoor unit displays HJ Troubleshooting Step 1 Check the fault code displayed on the wired controller of the indoor unit Ste...

Page 133: ...played on the wired controller of the indoor unit If the wired controller displays H2 check the fault code displayed on the 2 digit digital LED of the main control board of the outdoor unit based on which you are able to identify the specific fault of the fan drive board Then troubleshoot the fault according to the corresponding troubleshooting methods Possible causes Over voltage protection for t...

Page 134: ...t indicates the reset protection for the fan drive board Possible causes The fan drive board operates improperly Troubleshooting H3 Reset Protection for the Fan Drive Module The fan drive board is abnormal Yes Replace the fan drive board No Is the problem solved after the fan drive board is powered off and then powered on for more than three times No Yes Compressor drive board is abnormal Replace ...

Page 135: ...Inverter Fan Over current Protection The fan drive board is abnormal Yes Replace the fan drive board No Whether the U V and W phases of fan wires are connected properly Yes No Replace the fan Whether the resistance between the windings of each phase for the fan is normal generally less than 10 ohms Whether the resistance values are equal to each other Is grounding insulation of the phase windings ...

Page 136: ...dule Protection for the Fan Drive The fan drive board is abnormal Yes Replace the fan drive board No Whether the U V and W phases of fan wires are connected properly Yes No Replace the fan Whether the resistance between the windings of each phase for the fan is normal generally less than 10 ohms Whether the resistance values are equal to each other Is grounding insulation of the phase windings of ...

Page 137: ...igit digital LED of the outdoor unit s main control board is H7 it indicates the temperature sensor fault for the fan drive Possible causes The fan drive board operates improperly Troubleshooting H7 Temperature Sensor Fault of Fan Drive The fan drive board is abnormal Yes Replace the fan drive board No If the problem resolved after the unit is powered off and then powered on for more than three ti...

Page 138: ...The IPM module is not covered or unevenly covered by thermal grease or covered by dried thermal grease The IPM module s screws are not tightened The fan drive board operates improperly Troubleshooting H8 Temperature Sensor Fault of Fan Drive Whether the drive board screws are tightened Whether the IPM module is coated with thermal grease Whether over temperature protection of IPM module is trigger...

Page 139: ...shooting H9 Loss of Synchronization Protection for the Inverter Fan The fan drive board is abnormal Yes Replace the fan drive board No Whether the U V and W phases of fan wires are connected properly Yes No Replace the fan Whether the resistance between the windings of each phase for the fan is normal generally less than 10 ohms Whether the resistance values are equal to each other Is grounding in...

Page 140: ...ction Circuit Fault of Fan Drive The fan drive board is abnormal Yes Replace the fan drive board No If the problem resolved after the unit is powered off and then powered on for more than three times 2 88 HH Over Voltage Protection for DC Bus of Fan Drive Fault display main board of outdoor unit displays Fault diagnosis If the fault code displayed on the 2 digit digital LED of the outdoor unit s m...

Page 141: ...tdoor unit displays Fault diagnosis If the fault code displayed on the 2 digit digital LED of the outdoor unit s main control board is HL it indicates the under voltage protection for the DC bus of fan drive Possible causes The unit s input power cable has a voltage below 320 V The fan drive board operates improperly Troubleshooting HL Under Voltage Protection for the DC Bus of Fan Drive The fan d...

Page 142: ... Fan Startup Failure The fan drive board is abnormal Yes Replace the fan drive board No Whether the U V and W phases of fan wires are connected properly Yes No Replace the fan Whether the resistance between the windings of each phase for the fan is normal generally less than 10 ohms Whether the resistance values are equal to each other Is grounding insulation of the phase windings of the fan norma...

Page 143: ...as a fault thereby causing the shutdown of the unit to ensure safe operation Possible causes Other modules have faults thereby causing the unit to stop operation Troubleshooting Troubleshoot other modules 2 92 J1 Compressor 1 Over current Protection Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis When the operating curren...

Page 144: ...uns at the lowest frequency the compressor may have enabled normal over current protection In this case check whether the fan operates properly and whether the ambient temperature is normal and whether the power supply is normal 320V 460V Power on again the units based on the capacity and number of indoor units enabled previously in the case of protection state Whether the drive module is normal Y...

Page 145: ...oting J2 Compressor 2 Over current Protection The compressor is abnormal Yes Yes Replace the compressor No Replace the drive module If the high pressure value of the unit is still above 60 C when the compressor runs at the lowest frequency the compressor may have enabled normal over current protection In this case check whether the fan operates properly and whether the ambient temperature is norma...

Page 146: ...oting J3 Compressor 3 Over current Protection The compressor is abnormal Yes Yes Replace the compressor No Replace the drive module If the high pressure value of the unit is still above 60 C when the compressor runs at the lowest frequency the compressor may have enabled normal over current protection In this case check whether the fan operates properly and whether the ambient temperature is norma...

Page 147: ...oting J4 Compressor 4 Over current Protection The compressor is abnormal Yes Yes Replace the compressor No Replace the drive module If the high pressure value of the unit is still above 60 C when the compressor runs at the lowest frequency the compressor may have enabled normal over current protection In this case check whether the fan operates properly and whether the ambient temperature is norma...

Page 148: ...oting J5 Compressor 5 Over current Protection The compressor is abnormal Yes Yes Replace the compressor No Replace the drive module If the high pressure value of the unit is still above 60 C when the compressor runs at the lowest frequency the compressor may have enabled normal over current protection In this case check whether the fan operates properly and whether the ambient temperature is norma...

Page 149: ...oting J6 Compressor 6 Over current Protection The compressor is abnormal Yes Yes Replace the compressor No Replace the drive module If the high pressure value of the unit is still above 60 C when the compressor runs at the lowest frequency the compressor may have enabled normal over current protection In this case check whether the fan operates properly and whether the ambient temperature is norma...

Page 150: ...and receiver of indoor unit display Fault diagnosis When the difference between the system high pressure and low pressure during operation detected by the pressure sensor is less than 0 1 MPa the unit will stop running to ensure safe operation Possible causes The coil or connecting wire is abnormal The main board is abnormal The four way valve is abnormal Troubleshooting ...

Page 151: ...t the four way valve is abnormal No Connect them properly and reliably No Replace the main control board Whether the difference between the high pressure and the low pressure of the unit during operation is greater than 0 1 MPa At the same time touch the four way valve by hand to see whether it is hot or cold In cooling mode E pipe and S pipe are of low temperature and low pressure while D pipe an...

Page 152: ... The ambient temperature where the unit operates exceeds the limit Troubleshooting J8 Over High Pressure Ratio Protection Replace the pressure sensor Yes Whether the air return temperature of the unit exceeds the limit during operation requirements in cooling mode outdoor ambient temperature 5 C to 50 C indoor ambient temperature 16 C to 32 C requirements in heating mode outdoor ambient temperatur...

Page 153: ...ode outdoor ambient temperature 5 C to 50 C indoor ambient temperature 16 C to 32 C requirements in heating mode outdoor ambient temperature 20 C to 24 C indoor ambient temperature 16 C to 30 C Whether the high and low pressure sensors are operating properly based on the Table of Characteristics of Pressure Sensors No This case is normal as it is subject to ambient temperature Yes 2 101 L0 Indoor ...

Page 154: ...ult code will be displayed in the temperature area if the unit indoor has multiple faults fault codes will be displayed in the temperature area at an interval of 3 seconds Press the ON OFF button on the interface of IDU project number and fault enquiry to exist the parameter enquiry interface ...

Page 155: ...r of indoor unit display Applicable models all indoor units Fault diagnosis Check whether the indoor unit rotates slowly or stops or whether there exists external fan protection signal If yes it indicates the indoor fan protection Possible causes The motor stops or is stuck The main board of indoor unit operates improperly Troubleshooting ...

Page 156: ...e model s motor Yes No The main board of indoor unit operates improperly Replace the main board of indoor unit Yes For an AC motor without fan protection signal input for details see the circuit diagram of the indoor unit check whether the fan protection input is connected properly on the main board Looseness oxidation or poor contact of jumpers may misleadingly trigger indoor fan protection No Fo...

Page 157: ...e level of water in the drainage pan is high but the float switch works normally check whether the drain pump is working normally Whether the drain pipe is abnormal The drain pipe s hoisting height may exceed that of the drain pump and the drain pipe may be clogged If the indoor unit is not provided with a built in drain pump the water pump s output end is suspended and the float switch is short c...

Page 158: ...ated Possible causes The wires of the wired controller are short circuited The main board of indoor unit operates improperly The main board of the wired controller is abnormal Troubleshooting L4 Supply Power Over current Protection Whether the power cord of the wired controller is short circuited Replace the wired controller Yes No Reconnect the power cord of the wired controller Yes No Is the mai...

Page 159: ...er dust accumulates on the filter or evaporator Replace the motor of indoor unit No No Whether the motor of indoor unit is normal In the case of an AC motor if the motor slows down or stops when a fault occurs it may cause the indoor unit to exchange heat ineffectively and the evaporator to freeze Clean the indoor unit No When the ambient temperature in which the indoor unit and the outdoor unit o...

Page 160: ...ossible causes The master indoor unit is disconnected The main board of the master indoor unit is replaced The main board of the master indoor unit is faulty Troubleshooting L7 No Master Indoor Unit Whether all the indoor units are connected to the same power supply system Reset the master indoor unit Yes Any delay in powering on the master indoor unit will trigger the no master indoor unit fault ...

Page 161: ...tegrated Control Whether more than 16 indoor units are connected to the wired controller Set the wired controller so that one wired controller can only control 16 indoor units at most Yes Enter the wired controller parameter settings P14 to set the number of indoor units under integrated control to be the same as the number of indoor units that are connected to the wired controller No 2 110 LA Inc...

Page 162: ...oor units or change the outdoor unit to make it match the indoor units 2 113 n0 System Energy Efficiency Running Settings Status Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis This is a status code of a function It indicates that the unit has entered energy efficiency state 00 indicates comfort as priority 01 indicates e...

Page 163: ...unit has entered unit fault query state In this case you can query five historical faults of indoor and outdoor units Keep in mind that you have to query the faults respectively for indoor units and outdoor units Possible causes Troubleshooting not required 2 117 n7 Unit Parameter Query Status Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit disp...

Page 164: ...ssible causes Troubleshooting not required 2 121 nH Heating Only Unit Fault display main board of outdoor unit displays Fault diagnosis The code indicates that the indoor unit only operates in heating mode Possible causes Troubleshooting not required 2 122 nC Cooling Only Unit Fault display main board of outdoor unit displays Fault diagnosis The code indicates that the indoor unit only operates in...

Page 165: ...re protection for the compressor drive 2 digit digital LED of the main control board of the outdoor unit displays P8 Current detection circuit fault of compressor drive 2 digit digital LED of the main control board of the outdoor unit displays PC Charging loop fault of compressor drive 2 digit digital LED of the main control board of the outdoor unit displays PF Loss of synchronization protection ...

Page 166: ...l LED of the main control board of the outdoor unit based on which you are able to identify the specific fault of the compressor drive board Then troubleshoot the fault according to the corresponding troubleshooting methods Possible causes Over voltage protection for the DC bus of compressor drive 2 digit digital LED of the main control board of the outdoor unit displays PH Under voltage protectio...

Page 167: ...erter Compressor Over current Protection Fault display main board of outdoor unit displays Fault diagnosis If the fault code displayed on the 2 digit digital LED of the outdoor unit s main control board is P5 it indicates the over current protection for the inverter compressor Possible causes Poor contact of compressor s UVW cables The compressor s UVW cables are wrongly connected The compressor i...

Page 168: ...ce values are equal to each other Is grounding insulation of the phase windings of the compressor normal generally greater than 2 megohms Yes Yes Remove foreign matters and open the valve Whether the system is clogged and whether the valve is open Yes whether the system control valve is normal for example whether balance valve operates normally and whether the control terminal is plugged properly ...

Page 169: ... fault code displayed on the 2 digit digital LED of the outdoor unit s main control board is P6 it indicates the IPM module protection for the compressor drive Possible causes Poor contact of compressor s UVW cables The compressor s UVW cables are wrongly connected The compressor is damaged The system is blocked IPM module of the compressor drive board is damaged Troubleshooting ...

Page 170: ...es are equal to each other Is grounding insulation of the phase windings of the compressor normal generally greater than 2 megohms Yes Yes Remove foreign matters and open the valve Whether the system is clogged and whether the valve is open Yes whether the system control valve is normal for example whether balance valve operates normally and whether the control terminal is plugged properly Yes Whe...

Page 171: ...em solved after the unit is powered off and powered on for more than three times The compressor drive board operates improperly No Replace the compressor drive board Yes 2 132 P8 IPM Over Temperature Protection for Compressor Drive Board Fault display main board of outdoor unit displays Fault diagnosis If the fault code displayed on the 2 digit digital LED of the outdoor unit s main control board ...

Page 172: ... screws are tightened and whether the IPM module is coated with thermal grease No 2 133 P9 Loss of Synchronization Protection for Inverter Compressor Fault display main board of outdoor unit displays Fault diagnosis If the fault code displayed on the 2 digit digital LED of the outdoor unit s main control board is P9 it indicates the loss of synchronization protection for the inverter compressor Po...

Page 173: ...ch other Is grounding insulation of the phase windings of the compressor normal generally greater than 2 megohms Yes Yes Remove foreign matters and open the valve Whether the system is clogged and whether the valve is open Yes whether the system control valve is normal for example whether balance valve operates normally and whether the control terminal is plugged properly Yes Whether other faults ...

Page 174: ...g PC Current Detection Circuit Fault of Compressor Driver Is the problem resolved after the unit is powered off and then powered on for more than three times The compressor drive board operates improperly No Replace the compressor drive board Yes 2 135 PH Over Voltage Protection for DC Bus of Compressor Drive Fault display main board of outdoor unit displays Fault diagnosis When the input power ca...

Page 175: ...5 GMV5S series Fault diagnosis When the input power cable of the main board has a voltage below 320 V the unit triggers protection against faults Possible causes The unit s input power cable has a voltage below 320V The compressor drive board operates improperly Troubleshooting PL Under Voltage Protection for the DC Bus of Compressor Driver The compressor drive board operates improperly Yes Whethe...

Page 176: ... the windings of each phase for the compressor is normal generally less than 2 ohms Whether the resistance values are equal to each other Is grounding insulation of the phase windings of the compressor normal generally greater than 2 megohms Yes Yes Remove foreign matters and open the valve Whether the system is clogged and whether the valve is open Yes whether the system control valve is normal f...

Page 177: ...door units Fault diagnosis When the capacity DIP switch detected by the outdoor unit s main board is inconsistent with the unit s actual capacity or the jumper cap value detected by the outdoor unit s main board is inconsistent with the actual unit the fault is generated Possible causes Capacity DIP switch error or jumper cap error for some models without jumper caps jumper cap error is not detect...

Page 178: ...ing U3 Power Phase Sequence Protection The detection circuit may operate improperly Yes Whether the three phase power supply is connected properly No Replace the main control board 2 141 U4 Refrigerant Loss Protection Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis Check the high pressure and the low pressure of the unit ...

Page 179: ...al the unit prompts you to confirm whether you want to open the check valve again After confirmation press SW4 to proceed Possible causes The check valve of the outdoor unit is not open Troubleshooting Reconfirm and open the check valve of the outdoor unit 2 143 U8 Abnormal Pipes of the Indoor Unit Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit...

Page 180: ...receiver of indoor unit display Fault diagnosis During commissioning process check the pressure of the unit to determine whether the pipes of the outdoor unit are blocked Any abnormal parameters found would indicate that the unit has the fault Possible causes The electronic expansion valve operates improperly The outdoor unit s pipes are blocked Troubleshooting U9 Abnormal Pipes of Outdoor Unit Po...

Page 181: ...o Refrigerant Charging Void Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The code is displayed when the outdoor ambient temperature exceeds the range of auto refrigerant charging the normal range of charging refrigerant automatically is 0 40 C Possible causes Troubleshooting Disable the auto refrigerant charging Instea...

Page 182: ...mperatures meet the requirements of the unit In cooling mode check whether the ambient temperature of the indoor unit is higher than 32 C If it occurs within the first one hour after startup it is acceptable otherwise it indicates that the model configuration is unreasonable In cooling mode check whether the outdoor ambient temperature is higher than 40 C If yes it is acceptable In heating mode ch...

Page 183: ...the corresponding components Possible causes 1 The pressure sensor fails to work properly 55 64 2 The discharge temperature sensor shell roof temperature sensor fails to work properly 105 118 Troubleshooting Check which module does not start No s The unit does not start and there is no fault code displayed Connect the commissioning the multi functional debugger Confirm that the high pressure of th...

Page 184: ...olution Malfunctioned cooling and heating The air inlet or air outlet of the indoor or outdoor unit is blocked Remove obstacles Improper set of temperature Adjust the settings of the remote controller or wired controller The fan speed is too low Adjust the settings of the remote controller or wired controller Incorrect wind direction Adjust the settings of the remote controller or wired controller...

Page 185: ...le concentration kg m3 Refrigerant charge kg Adding quantity of refrigerant kg ex factory charge of ODU kg Refrigerant charge Max refrigerant charge 3 When refrigerant charge has exceeded the max refrigerant charge re design the refrigeration system and divide the refrigeration system to several refrigeration systems of small volume or add corresponding ventilation measures and alarms The flow whe...

Page 186: ...ge the refrigerant according to the refrigerant charging method of the general indoor unit For example1 Outdoor unit consists of one 28kW module and one 45kW module Five 14kW duct type units are used as indoor units IDU ODU rated capacity collocation ratio C 14 0 5 28 0 45 0 96 The quantity of included IDUs is more than 4 sets Please refer to the above table Additional refrigerant quantity B for 2...

Page 187: ...s completed close the high pressure gauge valve and the low pressure gauge valve Disassemble the intermediate gauge pipe and the vacuum pump connection end and then connect the refrigerant tank Step 3 Properly loosen the pipe of intermediate gauge and the connection end of pressure gauge slightly open the refrigerant tank valve and empty the pipe of intermediate gauge After that retighten the join...

Page 188: ...nto the system and the calculated added amount of refrigerant has not been fully charged into the system record current total pre charging amount m m1 m2 m3 m4 mn 1 mn Remained refrigerant for start up charging m M m M is the calculated total required refrigerant charging volume If the amount of pre charging refrigerant m has reached the total added amount of refrigerant for the system close the r...

Page 189: ...t see the debugging part for the specific operation Step 4 When it comes to the procedure of charging refrigerant open the refrigerant tank valve and charge the residual refrigerant m Step 5 When all refrigerant has been charged close the refrigerant tank valve and wait until the automatic debugging for the complete unit is finished Step 6 Once debugging is finished disassemble the pressure gauge ...

Page 190: ... 415V 3N 50Hz 60Hz neutral line and earth line The drive board can convert AC power to DC power of about 540 V 1 41 x power voltage DC AC three phase inverter Use of power to the main control board Phase protection Providing 220V AC power for the solenoid valve coil and 4 way valve coil Generating the low voltage DC power Circuit diagram Layout of electrical appliance box Physical position Models ...

Page 191: ...re 380V 415V 3N 50Hz 60Hz neutral line and earth line The drive board can convert AC power to DC power of about 540 V 1 41 x power voltage DC AC three phase inverter Use of power to the main control board Phase protection Providing 220V AC power for the solenoid valve coil and 4 way valve coil Generating the low voltage DC power Circuit diagram Layout of electrical appliance box Physical position ...

Page 192: ... neutral line and earth line The drive board can convert AC power to DC power of about 540 V 1 41 x power voltage DC AC three phase inverter Use of power to the main control board Phase protection Providing 220V AC power for the solenoid valve coil and 4 way valve coil Generating the low voltage DC power Circuit diagram Layout of electrical appliance box Physical position Models GMV 400WM G X GMV ...

Page 193: ... neutral line and earth line The drive board can convert AC power to DC power of about 540 V 1 41 x power voltage DC AC three phase inverter Use of power to the main control board Phase protection Providing 220V AC power for the solenoid valve coil and 4 way valve coil Generating the low voltage DC power Circuit diagram Layout of electrical appliance box Physical position Models GMV 560WM G X GMV ...

Page 194: ...rom the main switch board to the ODU 1 Use an ohmmeter of at least 500V DC to check whether the insulation resistance between each phase and the ground reaches at least 1 megohm Small insulation resistance indicates a potential electric leakage Warning Electric shock 2 After the checking connect the power and verify that the voltage of the power terminals is correct The power voltage between two p...

Page 195: ...on Three types of temperature sensors of different specifications are used including 50K 20K and 15K The sensors are used to measure the temperature of the unit at different positions Models GMV 224WM G X GMV 280WM G X GMV 335WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 196: ...es of temperature sensors of different specifications are used including 50K 20K and 15K The sensors are used to measure the temperature of the unit at different positions Models GMV 400WM G X GMV 450WM G X GMV 504WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 197: ...es of temperature sensors of different specifications are used including 50K 20K and 15K The sensors are used to measure the temperature of the unit at different positions Models GMV 560WM G X GMV 615WM G X GMV 680WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 198: ...e connecting terminal of the temperature sensors is firm 3 Use a thermometer to measure the temperature of the spot sensed by the temperature sensors 4 Disconnect the connecting terminal of the corresponding temperature sensor from the main board Use a multimeter to measure the resistance of the temperature sensors and compare it with the confirmed temperature range 5 If the measured resistance an...

Page 199: ...44 15 108 7 10 82 75 5 63 46 0 49 02 5 38 15 10 29 9 15 23 6 20 18 75 25 15 30 12 07 35 9 779 40 7 967 45 6 529 50 5 379 55 4 456 60 3 711 65 3 105 70 2 611 75 2 205 80 1 871 85 1 594 90 1 363 95 1 171 100 1 009 105 0 873 110 0 7577 115 0 6599 120 0 5765 125 0 5052 130 0 4441 135 0 3914 140 0 346 145 0 3066 150 0 2725 155 0 2427 160 0 2166 ...

Page 200: ...265 5 20 196 9 15 145 10 110 3 5 84 61 0 65 37 5 50 87 10 39 87 15 31 47 20 25 01 25 20 30 16 1 35 13 04 40 10 62 45 8 705 50 7 173 55 5 942 60 4 948 65 4 14 70 3 481 75 2 94 80 2 495 85 2 125 90 1 818 95 1 561 100 1 346 105 1 164 110 1 01 115 0 8799 120 0 7687 125 0 6736 130 0 5921 135 0 5219 140 0 4613 145 0 4088 150 0 3633 155 0 3237 160 0 2891 ...

Page 201: ... 20 486 55 15 362 99 10 274 02 5 209 05 0 161 02 5 126 17 10 98 006 15 77 349 20 61 478 25 49 191 30 39 61 35 32 088 40 26 147 45 21 425 50 17 651 55 14 618 60 12 168 65 10 178 70 8 5551 75 7 2245 80 6 1288 85 5 2223 90 4 4693 95 3 841 100 3 3147 105 2 8721 110 2 4983 115 2 1816 120 1 9123 125 1 6821 130 1 485 135 1 3155 140 1 1694 145 1 0429 150 0 9331 ...

Page 202: ...ing mode If the 4 way valve is active the unit works in heating mode if the 4 way valve is inactive the unit works in cooling mode The solenoid valve is used to control the on and off of the pipeline The valve of the unit is solid closed That is the valve is closed when it is inactive open when it is active Circuit diagram Layout of electrical appliance box Physical position Models GMV 224WM G X G...

Page 203: ...g mode and heating mode If the 4 way valve is active the unit works in heating mode if the 4 way valve is inactive the unit works in cooling mode The solenoid valve is used to control the on and off of the pipeline The valve of the unit is solid closed That is the valve is closed when it is inactive open when it is active Circuit diagram Layout of electrical appliance box Physical position ...

Page 204: ...f the 4 way valve is active the unit works in heating mode if the 4 way valve is inactive the unit works in cooling mode The solenoid valve is used to control the on and off of the pipeline The valve of the unit is solid closed That is the valve is closed when it is inactive open when it is active Circuit diagram Layout of electrical appliance box Physical position Models GMV 400WM G X GMV 450WM G...

Page 205: ...f the 4 way valve is active the unit works in heating mode if the 4 way valve is inactive the unit works in cooling mode The solenoid valve is used to control the on and off of the pipeline The valve of the unit is solid closed That is the valve is closed when it is inactive open when it is active Circuit diagram Layout of electrical appliance box Physical position Models GMV 560WM G X GMV 615WM G...

Page 206: ...emove the electrical appliance cover and check whether the connecting terminal of the 4 way valve or solenoid valve is firm 3 Disconnect the corresponding valve s coil terminal from the main board and use a multimeter to measure the coil resistance 4 If the measured resistance does not match with that in the following table the coil needs to be replaced Coil Bolt on the main board Resistance Ω Nor...

Page 207: ...openness of 3000 pls and 6 core coil Subcooling electronic expansion valve and EVI electronic expansion valve with the largest openness of 480 pls and 5 core coil The electronic expansion valve is used to control the flow When the electronic expansion valve is closed the openness is 0 pls the flow is stopped Circuit diagram Layout of electrical appliance box Physical position Models GMV 224WM G X ...

Page 208: ... largest openness of 3000 pls and 6 core coil Subcooling electronic expansion valve and EVI electronic expansion valve with the largest openness of 480 pls and 5 core coil The electronic expansion valve is used to control the flow When the electronic expansion valve is closed the openness is 0 pls the flow is stopped Circuit diagram Layout of electrical appliance box Physical position ...

Page 209: ...0 pls and 6 core coil Subcooling electronic expansion valve and EVI electronic expansion valve with the largest openness of 480 pls and 5 core coil The electronic expansion valve is used to control the flow When the electronic expansion valve is closed the openness is 0 pls the flow is stopped Circuit diagram Layout of electrical appliance box Physical position Models GMV 400WM G X GMV 450WM G X G...

Page 210: ...0 pls and 6 core coil Subcooling electronic expansion valve and EVI electronic expansion valve with the largest openness of 480 pls and 5 core coil The electronic expansion valve is used to control the flow When the electronic expansion valve is closed the openness is 0 pls the flow is stopped Circuit diagram Layout of electrical appliance box Physical position Models GMV 560WM G X GMV 615WM G X G...

Page 211: ...ced Step 2 Switch off the power of the ODU disconnect the coil terminal of the electronic expansion valve from the main board and use a multimeter to measure the resistance of each contact point of the terminal The normal range of the resistance is shown in the following table If any value is beyond the normal range the coil is damaged and needs to be replaced Coil Interface No Color Port specific...

Page 212: ...ans The fans are connected to the fan drive board by a group of three power cables The fans are powered by a DC inverter motor and can adjust the speed automatically according to the environmental temperature and load thus adapting to the demand of the unit operation Circuit diagram Layout of electrical appliance box Physical position Models GMV 224WM G X GMV 280WM G X GMV 335WM G X ...

Page 213: ...Gree GMV6 DC Inverter VRF Units Service Manual 211 Models GMV 400WM G X GMV 450WM G X GMV 504WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 214: ...Gree GMV6 DC Inverter VRF Units Service Manual 212 Models GMV 560WM G X GMV 615WM G X GMV 680WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 215: ...es and baffle ring deform and needs to be replaced 4 5 2 Electrical Inspection Switch off the power of the ODU Disconnect the connector between the fan motor and fan drive board Use a multimeter to measure the resistance of each contact point of the motor terminal The normal range of the resistance is shown in the following table If any value is beyond the normal range the motor is damaged and nee...

Page 216: ...Gree GMV6 DC Inverter VRF Units Service Manual 214 Models GMV 224WM G X GMV 280WM G X GMV 335WM G X Circuit diagram Physical position ...

Page 217: ...Gree GMV6 DC Inverter VRF Units Service Manual 215 Models GMV 400WM G X GMV 450WM G X GMV 504WM G X Circuit diagram Physical position ...

Page 218: ...Gree GMV6 DC Inverter VRF Units Service Manual 216 Models GMV 560WM G X GMV 615WM G X GMV 680WM G X Circuit diagram Physical position ...

Page 219: ...id valve pressure and monitor the measured data on a PC Compare the data to the following table of recommended current The current may deviates by about 10 depending on the inverter compressor s speed and working condition 1 Inverter compressor AA55PHDG D1Y2 When the compressor frequency is 30 Hz the current curve under different evaporation temperature and condensation temperature is shown as fol...

Page 220: ...the evaporation temperature and condensation temperature is shown as follows Current curve Current A Evaporation temperature C When the compressor frequency is 90 Hz the current curve corresponding to the evaporation temperature and condensation temperature is shown as follows Current curve Current A Evaporation temperature C ...

Page 221: ...ing at another frequency the current curve can be obtained through interpolation calculation of the above frequency 2 Inverter compressor DA80PHDG D1Y2 When the compressor frequency is 30 Hz the current curve corresponding to the evaporation temperature and condensation temperature is shown as follows Current Evaporation temperature C When the compressor frequency is 60 Hz the current curve corres...

Page 222: ... current curve corresponding to the evaporation temperature and condensation temperature is shown as follows Current Evaporation temperature C When the compressor frequency is 120 Hz the current curve corresponding to the evaporation temperature and condensation temperature is shown as follows Current Evaporation temperature C ...

Page 223: ...pection with that of the normally running unit Step 3 Check whether the electronic expansion valve of the ODU and 4 way valve work properly and whether the oil return pipeline and oil return valve are normal Touch the oil return capillary tube with a hand to check whether oil flows in the tube and check the pipeline temperature Diagnosis method 1 Electronic expansion valve When the unit is powered...

Page 224: ...Gree GMV6 DC Inverter VRF Units Service Manual 222 Subcooling electronic expansion valve Heating electronic expansion valve Note on touching the electronic expansion valve ...

Page 225: ...valve works obvious sound and vibration can be heard and felt Do not touch directly by hand the position of the four way valve in the unit High temperature refrigerant on the exhaust side may cause danger of burning D Connecting to the exhaust side Warning high temperature Marks are made on the 4 way valve D indicates connection to the exhaust side E indicates connection to the IDU evaporator S in...

Page 226: ...produces obvious valve pushing sound Do not touch the pipeline with hands Otherwise you may get scalded 3 Oil return solenoid valve It can be diagnosed based on the oil return valve status displayed on the monitor program and the actual operation When the balance valve is open the coil heats up and the lubricant flow before and after the valve is obvious Oil return valve 1 Oil return valve 2 Auxil...

Page 227: ...the P bonding pad and the red probe to the W wiring terminal In the normal condition the multimeter will not beep If it does the drive board is damaged and needs to be replaced 8 Point the black probe to the N bonding pad and the red probe to the L1 wiring terminal In the normal condition the multimeter will not beep If it does the drive board is damaged and needs to be replaced 9 Point the black ...

Page 228: ...er the compressor is wired correctly Step 2 Measure the resistance between any two of the wiring terminals of the compressor U V and W The resistance between two wiring terminals of AA55PHDG D1Y2 is 0 197 7 Ω The resistance between two wiring terminals of DA80PHDG D1Y2 is 0 086 7 Ω Measure the grounding resistance of each wiring terminal which should be greater than 10 MΩ otherwise the compressor ...

Page 229: ...ssor drive board is used to control the operation of the compressor Specifications Description The compressor drive board is used to control the operation of the compressor Models GMV 224WM G X GMV 280WM G X GMV 335WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 230: ...Gree GMV6 DC Inverter VRF Units Service Manual 228 Models GMV 400WM G X GMV 450WM G X GMV 504WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 231: ...Gree GMV6 DC Inverter VRF Units Service Manual 229 Models GMV 560WM G X GMV 615WM G X GMV 680WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 232: ...er point the red probe of the multimeter to the N1 bonding pad shown in the following figure and the black probe to L1 L2 and L3 wiring terminals respectively and check the readings of the multimeter Point the black probe of the multimeter to the P2 bonding pad shown in the following figure and the red probe to U V and W wiring terminals respectively and check the readings of the multimeter point ...

Page 233: ...drive board is used to control the operation of the fan s Specifications Description The compressor drive board is used to control the operation of the compressor Models GMV 224WM G X GMV 280WM G X GMV 335WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 234: ...Gree GMV6 DC Inverter VRF Units Service Manual 232 Models GMV 400WM G X GMV 450WM G X GMV 504WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 235: ...Gree GMV6 DC Inverter VRF Units Service Manual 233 Models GMV 560WM G X GMV 615WM G X GMV 680WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 236: ...bonding pad shown in the following figure and the red probe to U V and W wiring terminals respectively and check the readings of the multimeter point the red probe of the multimeter to the N bonding pad shown in the following figure and the black probe to U V and W wiring terminal respectively and check the readings of the multimeter 3 Result analysis If all the readings of the multimeter are betw...

Page 237: ...Gree GMV6 DC Inverter VRF Units Service Manual 235 Models GMV 224WM G X GMV 280WM G X GMV 335WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 238: ...Gree GMV6 DC Inverter VRF Units Service Manual 236 Models GMV 400WM G X GMV 450WM G X GMV 504WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 239: ...Gree GMV6 DC Inverter VRF Units Service Manual 237 Models GMV 560WM G X GMV 615WM G X GMV 680WM G X Circuit diagram Layout of electrical appliance box Physical position ...

Page 240: ...not beep Anode of fuse 2 Cathode of fuse 7 The fuse is damaged and needs to be replaced if the multimeter does not beep CN1 4 CN1 6 The main board is normal if the multimeter does not beep CN12 8 CN12 9 The main board is normal if the multimeter does not beep CN58 11 CN58 10 The main board is normal if the multimeter does not beep CN58 11 CN54 12 The main board is normal if the multimeter does not...

Page 241: ... of exhaust superheat degree 5 Inspection of the minimum and maximum compression ratio Inspection of low pressure temperature of the low pressure sensor 1 Control of compressor output capacity 2 Conversion and calculation of saturated evaporating temperature 3 Inspection of suction superheat degree 4 Low pressure protection functions 5 Inspection of the minimum and maximum compression ratio Models...

Page 242: ... GMV6 DC Inverter VRF Units Service Manual 240 Models GMV 400WM G X GMV 450WM G X GMV 504WM G X Circuit diagram Layout of electrical appliance box Physical position High pressure sensor Low pressure sensor ...

Page 243: ... GMV6 DC Inverter VRF Units Service Manual 241 Models GMV 560WM G X GMV 615WM G X GMV 680WM G X Circuit diagram Layout of electrical appliance box Physical position High pressure sensor Low pressure sensor ...

Page 244: ...he reading of the pressure gauge on the gas valve If the value shown on the wired controller is within the range of 10 of the reading of the pressure gauge the pressure sensor is normal Otherwise it is abnormal 3 Inspection of high pressure sensor 1 Connect the pressure gauge to the gas valve and check if the gas and liquid valves are open 2 Switch the unit to the heating mode After the system sta...

Page 245: ...el 5 1 1 1 Removing the maintenance port panel 1 Press the window in the bulkhead cover to open the window 2 Use a tool to press the buckle shown in the figure to rotate and open the window in the bulkhead cover 3 Remove the screw and turn over the service seal plate to take out the seal plate 1 Buckle 2 Window in the bulkhead cover 3 Screw 4 Service seal plate ...

Page 246: ...t panel 2 Remove right panel from the unit 3 Screw Right panel 5 1 1 3 Removing the upper left panel bottom left panel and upper covering plate 1 Use a screwdriver to remove the screws marked by and in the figure 2 Remove upper covering plate upper left panel and bottom left panel 3 Screw Upper covering plate Upper left panel Bottom left panel ...

Page 247: ... from the unit 3 Screw Upper electrical appliance cover Bottom electrical appliance cover 5 2 Removing the ODU Main Board Preparations 1 Use the Power circuit breaker to switch off the Power of the GMV6 VRF system 2 Remove the unit s upper and bottom panels by referring to 5 1 1 Removing the Unit Panel 3 Remove the cover of electrical appliance box by referring to 5 1 2 Removing the Cover of Elect...

Page 248: ...etting DIP SA8 of the ODU There is only one master module in a refrigeration system set in the power off status The master module is defined as follows the ON position on the DIP identification is 0 the opposite direction is the status of 1 If SA8 is set to 00 it is the master module If SA8 is set to 10 it is a slave module Master module status Slave module status It can be checked by the display ...

Page 249: ...e main board Use a screwdriver to remove the screws marked by 2 on the main board Pull the side buckle 3 carefully to take out the main board from the unit Installation procedure 1 Complete the installation procedure in the reverse sequence of removal 2 Refer to the unit circuit diagram for the plugging 3 DIP setting Complete the setting of the new main board based on that of the faulty one while ...

Page 250: ...unit engineering commissioning status After the main board of the master module is replaced engineering commissioning needs to be performed on the master unit 6 System parameter setting After the engineering commissioning system parameters need to be set to be consistent with the previous system parameters Read ODU Function Setting for the setting method 5 3 Removing the Compressor Step 1 Preparat...

Page 251: ...pliance box cover of the compressor must be intact WARNING Check whether the models of the new and old compressors on the nameplates are the same Check the sealing rubber blocks of components such as the oil separator and gas separator If any sealing rubber block is missing use rubber tap to seal it in order to make sure that the vessel is dry and sealed ...

Page 252: ...welding flux 3 Get welding tools ready Assess the nitrogen and acetylene quantity necessary for the welding according to the part to be welded Prevent repeated welding of the same places 4 Get all the auxiliary service tools ready including hex key diagonal pliers pincer pliers needle nosed pliers multimeter pressure gauge Phillips screwdriver slotted screwdriver at least two wrenches insulating t...

Page 253: ...container may lead to breaking of the container or even an explosion Record the oil quantity after the lubricant is fully discharged Step 5 Discharging refrigerant The refrigerant in the system needs to be discharged from the high and low pressure sides of the system concurrently If the refrigerant is discharged from one side only the sealed scroll will hinder the refrigerant from being fully disc...

Page 254: ...lding point of compressor 2 Suction pipe welding point of compressor 1 Vapor injection tube welding point of compressor 1 Suction pipe welding point of compressor 2 Air discharge pipe welding point of compressor 2 Remove the fixing bolt of compressor 2 Remove the fixing bolt of compressor 1 Air discharge pipe welding point of compressor 1 Compressor 2 Compressor 1 The procedure of checking oil qua...

Page 255: ...s and smell the compressor oil Normal lubricant has no obvious pungent odor After removing the compressor and oil check the oil quality separately If it is contaminated replace the compressor oil separator and gas liquid separator If the color of the oil turns black check the other modules in the system using the same method Note Check the compressor that needs to be replaced and ensure that pipe ...

Page 256: ...oosen the connector of the oil return pipe of the oil separator 2 Checking gas liquid separator 1 Weld and loosen the connector of the inlet and outlet pipes of the gas liquid separator 3 Remove the gas liquid separator 2 Remove the gas liquid separator fixing bolt After removing the gas liquid separator check whether the gas liquid separator contains impurities or other substances The checking pr...

Page 257: ... the impurity composition Note If the compressor is damaged and needs to be replaced the gas liquid separator must be replaced at the same time It needs to be replaced regardless of whether it contains impurities or has any other exceptions 3 Checking the compressor oil return pipeline Remove the compressor oil return pipeline and check the amount of oil and impurities in the pipeline Remove the o...

Page 258: ...aced check whether there is any abnormality in the system pipeline Use nitrogen to blow the main pipeline and focus on detecting and removing the oil passages Removing the oil return pipeline 2 Use high pressure nitrogen to clean the capillary tube and oil return pipeline 1 Remove the oil return filter to see if it is blocked If yes replace the filter Checking the liquid pipe filter Remove the liq...

Page 259: ...orrect phase sequence In particular make sure that the two full inverter compressors are wired correctly If the power lines of compressor 1 and compressor 2 are reversed it may cause unit failure which may cause damage to the compressors in severe cases for example GMV 680WM GX model compressor 1 and compressor 2 are of the same type If compressor 1 and the compressor 2 power lines are reversed th...

Page 260: ...the gas liquid separator inlet and outlet pipes and then connect the nitrogen port on the gas liquid separator connection pipe The nitrogen position can be selected according to the site conditions Use the bypass interface or directly connect it to the inlet and outlet pipes of the gas liquid separator When the pipelines are large they can be fixed by tape Make sure that the nitrogen can flow smoo...

Page 261: ... charge the nitrogen valve at the same time with nitrogen The nitrogen pressure should be greater than 20kgf Use soapy water to check whether the unit system leaks and focus on checking the service joints 3 Finally charge the system with high pressure nitrogen to keep the system pressure at above 25kgf Close the large and small unit valves and hold the pressure of the IDUs and ODU for more than 12...

Page 262: ...ed for GMV 280WM G X The gas liquid separator and other parts such as filters need to be replaced The pipelines need to be cleaned by high pressure nitrogen Nearly all the parts are involved and nearly all the lubricant is discharged except for a small amount remaining in the pipelines Therefore 3 5L of refrigeration oil needs to be recharged according to the parameter form Lubricant recharging me...

Page 263: ...ications of vacuum pump are as follows Model Maximum vacuum discharge Purpose Air discharge Vacuum drying Oil lubricating rotor pump 100 L min Yes Yes Non oil rotor pump 50 L min Yes Yes Use a vacuum pump to vacuum the unit from the gas and liquid valves simultaneously The pressure gauge must be connected when vacuuming When the unit pressure reaches the absolute pressure 0 kgf cm2 and the gauge p...

Page 264: ... the nameplate of the ODU Step 17 Connecting electrical parts Connect the electrical parts according to the previous markings and the circuit diagram behind the electrical appliance cover connect the compressor cables the corresponding electric heating belt and the corresponding temperature sensors Note Check the wiring according to the circuit diagram and make sure that all the electrical parts a...

Page 265: ...2 Use gas welding to heat the four port DESC connecting pipe of the 4 way valve and pull them off the 4 way valve Nitrogen protection should be applied during welding Refer to Table 1 for nitrogen pressure Table 1 Nitrogen Pressure for Pipeline Assembly Welding Pipe diameter range mm Nitrogen pressure range MPa Pipe length m Shortest pre charge time s Shortest hysteresis nitrogen charging time s Φ...

Page 266: ...e wires according to the original requirements Refer to the unit wiring diagram 7 Make sure that the components and cables are properly connected 8 After checking that there is no problem buckle the front panel and tighten the screws 5 6 Removing and Installing Electronic Expansion Valve Preparations 1 Use the power circuit breaker to switch off the power of the GMV6 VRF system Make sure that the ...

Page 267: ...ic expansion valve 3 When welding the electronic expansion valve wrap the valve body with a damp cloth 4 Nitrogen protection should be applied Refer to Table 1 for nitrogen pressure Note When welding do not get the other components burnt 5 Install the electronic expansion valve coil to the correct position and turn it clockwise until a click is heard indicating that it is in place 6 Wrap the dampi...

Page 268: ...s of the oil separator and then pull the connecting tube off Note When welding do not get the other components burnt 3 Use a screwdriver to loosen the fixing bolt for the oil separator 4 Remove the oil separator from the chassis 1 Oil separator 2 Connection point 3 Oil separator bracket 4 Screws 5 Bolts and washers Installation procedure 1 Install the oil separator in place and tighten the foot bo...

Page 269: ...nection points 2 Gas liquid separator 3 Bolts and washers Installation procedure 1 Install the gas liquid separator in place and tighten the foot bolts of the gas liquid separator 2 Weld the two connection points of the gas liquid separator Nitrogen protection should be applied Refer to Table 1 for nitrogen pressure Note When welding do not get the other components burnt 3 Make sure that the compo...

Page 270: ...ts on the plate heat exchanger 3 Nitrogen protection should be applied Refer to Table 1 for nitrogen pressure Note When welding do not get the other components burnt 4 Make sure that the components and cables are properly connected 5 After checking that there is no problem buckle the front panel and tighten the screws A plate heat exchanger assembly 1 connection point 2 plate heat exchanger 3 plat...

Page 271: ...e heard when it is in place 3 Put on the heat shrinkable sleeve and tie the high temperature wire according to the original position 4 Fix the wires according to the original requirements Refer to the unit wiring diagram 5 Make sure that the components and cables are properly connected 6 After checking that there is no problem buckle the upper and bottom panels and tighten the screws 5 11 Removing...

Page 272: ...6 VRF system 2 Make sure that the unit pipeline system is free of refrigerant 3 Remove the unit s upper and bottom panels by referring to 5 1 1 Removing the Unit Panel Removing procedure 1 Remove the upper fixing block and wire tie of the pressure switch 2 Wrap the pressure switch with a damp cloth 3 After the pressure switch connection port is heated by gas welding pull off the pressure switch Ni...

Page 273: ...e a pipe cutter to cut off the solenoid valve inlet and outlet pipes and remove the valve body Cut off point Cut off point 3 Use gas welding to heat the pressure switch connection port and pull out the solenoid valve inlet and outlet pipes Nitrogen protection should be applied during welding the nitrogen pressure is 0 5 0 1kgf cm2 relative pressure 4 Weld and take off the old solenoid valve inlet ...

Page 274: ...r to switch off the power of the GMV6 VRF system 2 Remove the unit top cover assembly Removing procedure 1 Use a wrench to remove the fastening nut spring washer and flat piece in sequence 2 Take off the blade Installation procedure 1 Use the power circuit breaker to switch off the power of the GMV6 VRF system install the blades on the motor shaft and check if they are fixed properly 2 Use a wrenc...

Page 275: ...t 2 Install the blades by referring to the 5 14 Removing and Installing Blades 3 Connect the fan according to the original wiring 4 Install the unit s top cover assembly and panel by referring to 5 1 1 Removing and Installing the Unit Panel 3 bolt blade 5 16 Removing and Installing Electric Heating Belt Preparations 1 Use the power circuit breaker to switch off the power of the GMV6 VRF system 2 R...

Page 276: ...1 1 Removing and Installing the Unit Panel 1 buckle 2 spring hook 5 17 Removing and Installing Condenser Preparations 1 Use the power circuit breaker to switch off the power of the GMV6 VRF system 2 Make sure that the unit pipeline system is free of refrigerant 3 Remove the unit s panel by referring to 5 1 1 Removing and Installing the Unit Panel 4 Remove the top cover assembly by referring to 5 1...

Page 277: ...radiator 1 screw 2 electrical appliance box 3 radiator refrigerant tube 3 Remove the grille back the upper cross beams two in front and rear the right side panel and the left side panel 4 Use a screwdriver to remove the two screws that connect the condenser to the chassis 5 Weld and loosen the four connection points of the condenser and pipeline system and then pull the connecting tube off Note Wh...

Page 278: ... panel the right side panel the upper cross beams two in front and rear and the grille rear in sequence 4 Place the electrical appliance box in the correct position and tighten the screws 5 Weld the four connection points of the condenser and pipeline system and the two refrigerant tubes of the radiator of the box Adopt nitrogen protection during welding The nitrogen pressure is 0 5 0 1kgf cm2 rel...

Page 279: ...ion mouth 06120012 2 7 Fluoride injection mouth 06123006 1 8 One way valve 071001060007 1 9 4 way valve 43000339 1 10 Filter mesh type 07218603 1 11 Covering plate back 012035000236P 1 12 Mesh enclosure 016001060006 1 13 Condenser assembly 011002060413 1 14 Fluoride injection mouth 061200101 1 15 Fluoride injection mouth 06130002 1 16 Filter filter fork type pipe 0341010701 1 17 EXV coil UKV 43044...

Page 280: ...60Hz 1400 072001060007 1 41 4 way valve coil 072010060002 1 42 Solenoid valve coil 072001060006 1 43 Solenoid valve coil 072001060009 1 44 Electric heating belt compressor 7651521244 1 45 Pressure sensor 32218000009 1 46 Pressure sensor 32218000008 1 47 Electronic expansion valve 43044100190 1 48 Two way filter 07220016 1 49 Muter copper and steel 07245008 1 50 EXV coil UKV 4304413250 1 51 Compres...

Page 281: ...00002 2 5 Brushless DC motor 1570412406 2 6 Flow guiding ring 200150000011 2 7 Left side plate assembly 017037060016P 1 8 Electronic expansion valve coil 072002000011 1 9 Electronic expansion valve 43044100190 1 10 Solenoid valve 072008000005 1 11 Muter 07245008 1 12 Two way filter 07220016 1 13 Solenoid valve 43044100224 1 14 Unloading valve 07334100002 2 15 Electronic expansion valve 15704124 16...

Page 282: ...012 1 40 Condenser assembly 011002060249 1 41 Filter 0341010701 1 42 Mesh enclosure 016001060012 1 43 Covering plate 012035000247P 1 44 Terminal board 422000060055 1 45 Communication interface board 300014060038 1 46 Terminal board 422000060004 1 47 Filter board 300020060004 1 48 Main board 300027000582 2 49 Radiator 4901800008801 1 50 Main board 300027060023 1 51 Reactor 450004060005 1 52 Main bo...

Page 283: ... valve 072008000005 3 9 Filter 07222025 1 10 Condenser assembly 011002060226 1 11 Filter 07415200002 1 12 Fluoride injection mouth 061200101 1 13 Fluoride injection mouth 06130002 1 14 Filter filter fork type pipe 0341010701 1 15 Solenoid valve 43044100224 1 16 Unloading valve 07334100002 1 17 EXV coil UKV 4304413220 1 18 Electronic expansion valve 43044100173 1 19 Large tube filter 072190511 1 20...

Page 284: ...id valve coil 220 240V 50 60Hz 1000 072001060006 1 47 Solenoid valve coil 220 240V 50 60Hz 1600 072001060009 1 48 Electric heating belt compressor 7651521243 1 49 Electric heating belt compressor 7651521244 1 50 Pressure sensor 32210103 1 51 Pressure sensor 32218000008 1 52 Temperature sensor assembly lower 390002060038 1 53 Gas liquid separator 035027060004 1 54 Filter mesh type 07218603 1 55 4 w...

Page 285: ...1 871 2 934 10 82 75 0 506 81 1 811 2 945 9 78 43 0 53 82 1 754 2 955 8 74 35 0 554 83 1 699 2 964 7 70 5 0 579 84 1 645 2 974 6 66 88 0 605 85 1 594 2 983 5 63 46 0 631 86 1 544 2 992 4 60 23 0 658 87 1 497 3 001 3 57 18 0 686 88 1 451 3 009 2 54 31 0 714 89 1 408 3 017 1 51 59 0 743 90 1 363 3 025 0 49 02 0 773 91 1 322 3 033 1 46 8 0 801 92 1 282 3 04 2 44 31 0 835 93 1 244 3 047 3 42 14 0 866 ...

Page 286: ... 779 1 998 126 0 492 3 195 36 9 382 2 03 127 0 48 3 198 37 9 003 2 062 128 0 467 3 2 38 8 642 2 094 129 0 456 3 203 39 5 997 2 125 130 0 444 3 205 41 7 653 2 185 131 0 433 3 207 42 7 352 2 215 132 0 422 3 21 43 7 065 2 243 133 0 412 3 212 44 6 791 2 272 134 0 401 3 214 45 6 529 2 299 135 0 391 3 216 46 6 278 2 326 136 0 382 3 218 47 6 038 2 353 137 0 372 3 22 48 5 809 2 379 138 0 363 3 222 49 5 58...

Page 287: ...83 67 3 861 2 766 28 319 2 0 195 68 3 729 2 781 27 300 0 206 69 3 603 2 796 26 282 2 0 218 70 3 481 2 811 25 265 5 0 231 71 3 364 2 825 24 249 9 0 245 72 3 252 2 838 23 235 3 0 259 73 3 144 2 852 22 221 6 0 273 74 3 04 2 865 21 208 9 0 288 75 2 94 2 877 20 196 9 0 304 76 2 844 2 889 19 181 4 0 328 77 2 752 2 901 18 171 4 0 345 78 2 663 2 912 17 162 1 0 362 79 2 577 2 923 16 153 3 0 381 80 2 495 2 ...

Page 288: ...9 115 0 8799 3 161 20 25 01 1 466 116 0 8562 3 165 21 23 9 1 503 117 0 8333 3 168 22 22 85 1 54 118 0 8111 3 171 23 21 85 1 577 119 0 7895 3 175 24 20 9 1 614 120 0 7687 3 178 25 20 1 65 121 0 7485 3 181 26 19 14 1 686 122 0 7289 3 184 27 18 32 1 722 123 0 7099 3 187 28 17 55 1 758 124 0 6915 3 19 29 16 8 1 793 125 0 6736 3 192 30 16 1 1 828 126 0 6563 3 195 31 15 43 1 863 127 0 6395 3 198 32 14 7...

Page 289: ...34 Exhaust temperature sensor 50kΩ resistance voltage correspondence table including compressor top shell temperature sensor and air exhaust pipe temperature sensor Temperature C Resistance kΩ Voltage V Temperature C Resistance kΩ Voltage V 30 911 56 0 036 61 11 736 1 518 29 853 66 0 038 62 11 322 1 548 28 799 98 0 041 63 10 925 1 577 27 750 18 0 043 64 10 544 1 606 26 703 92 0 046 65 10 178 1 635...

Page 290: ... 102 85 0 292 100 3 3147 2 478 10 98 006 0 306 101 3 22 2 496 11 93 42 0 319 102 3 1285 2 514 12 89 075 0 333 103 3 0401 2 531 13 84 956 0 348 104 2 9547 2 547 14 81 052 0 362 105 2 8721 2 564 15 77 349 0 378 106 2 7922 2 58 16 73 896 0 393 107 2 715 2 595 17 70 503 0 41 108 2 6404 2 611 18 67 338 0 427 109 2 5682 2 626 19 64 333 0 444 110 2 4983 2 64 20 61 478 0 462 111 2 4308 2 655 21 58 766 0 4...

Page 291: ...86 0 994 134 1 3474 2 908 44 22 286 1 022 135 1 3155 2 916 45 21 425 1 05 136 1 2846 2 924 46 20 601 1 078 137 1 2545 2 932 47 19 814 1 107 138 1 2233 2 94 48 19 061 1 136 139 1 1969 2 947 49 18 34 1 164 140 1 1694 2 955 50 17 651 1 193 141 1 1476 2 96 51 16 99 1 223 142 1 1166 2 969 52 16 358 1 252 143 1 0913 2 975 53 15 753 1 281 144 1 0667 2 982 54 15 173 1 311 145 1 0429 2 988 55 14 618 1 34 1...

Page 292: ...2 36 2 11 2 7 50 32 19 7 35 2 24 1 7 74 33 20 2 34 2 33 0 7 99 34 20 7 33 2 43 1 5 94 35 21 2 32 2 53 2 8 50 36 21 7 31 2 64 3 8 77 37 22 3 30 2 75 4 9 04 38 22 8 29 2 86 5 9 32 39 23 4 28 2 98 6 9 61 40 24 0 27 3 10 7 9 90 41 24 6 26 3 22 8 10 2 42 25 2 25 3 35 9 10 5 43 25 8 24 3 48 10 10 8 44 26 4 23 3 61 11 11 1 45 27 0 22 3 75 12 11 5 46 27 7 21 3 89 13 11 8 47 28 3 20 4 04 14 12 1 48 29 0 19...

Page 293: ... 1 834 27 307 0 242 29 1848 1 884 26 319 0 255 30 1897 1 937 25 332 0 268 31 1946 1 989 24 345 0 282 32 1996 2 042 23 359 0 297 33 2048 2 098 22 373 0 312 34 2100 2 153 21 388 0 328 35 2153 2 21 20 403 0 344 36 2208 2 268 19 418 0 36 37 2263 2 327 18 434 0 377 38 2320 2 388 17 450 0 394 39 2377 2 448 16 467 0 412 40 2436 2 511 15 484 0 43 41 2495 2 574 14 502 0 45 42 2556 2 639 13 520 0 469 43 261...

Page 294: ...lute pressure kPA Voltage V Temperature C Absolute pressure kPA Voltage V 70 36 0 369 14 502 1 301 69 38 0 373 13 520 1 337 68 40 0 377 12 538 1 373 67 43 0 383 11 558 1 413 66 46 0 389 10 577 1 451 65 48 0 393 9 597 1 491 64 51 0 399 8 618 1 533 63 54 0 405 7 639 1 575 62 57 0 411 6 661 1 619 61 61 0 419 5 684 1 665 60 64 0 425 4 707 1 711 59 68 0 433 3 730 1 757 58 72 0 441 2 754 1 805 57 76 0 4...

Page 295: ...737 21 1493 3 283 34 230 0 757 22 1535 3 367 33 240 0 777 23 1577 3 451 32 250 0 797 24 1620 3 537 31 261 0 819 25 1664 3 625 30 272 0 841 26 1708 3 713 29 283 0 863 27 1754 3 805 28 295 0 887 28 1801 3 899 27 307 0 911 29 1848 3 993 26 319 0 935 30 1897 4 091 25 332 0 961 31 1946 4 189 24 345 0 987 32 1996 4 289 23 359 1 015 33 2048 4 393 22 373 1 043 34 2100 4 497 21 388 1 073 35 2153 4 603 20 4...

Page 296: ...G X 335 504 25 50 4 0 10 0 4 0 5 10 0 5 GMV 895WM G X 280 615 25 50 2 5 10 0 2 5 5 10 0 5 GMV 950WM G X 335 615 25 50 4 0 10 0 4 0 5 10 0 5 GMV 1015WM G X 400 615 40 50 6 0 10 0 6 0 5 10 0 5 GMV 1064WM G X 504 560 50 50 10 0 10 0 10 0 5 10 0 5 GMV 1119WM G X 504 615 50 50 10 0 10 0 10 0 5 10 0 5 GMV 1175WM G X 560 615 50 50 10 0 10 0 10 0 5 10 0 5 GMV 1230WM G X 615 615 50 50 10 0 10 0 10 0 5 10 0...

Page 297: ... 0 5 10 0 5 10 0 5 GMV 2590WM G X 615 615 680 680 50 50 50 50 10 0 10 0 10 0 10 0 10 0 5 10 0 5 10 0 5 10 0 5 GMV 2655WM G X 615 680 680 680 50 50 50 50 10 0 10 0 10 0 10 0 10 0 5 10 0 5 10 0 5 10 0 5 GMV 2720WM G X 680 680 680 680 50 50 50 50 10 0 10 0 10 0 10 0 10 0 5 10 0 5 10 0 5 10 0 5 NOTES Specification of circuit breaker and power cord is selected on the basis of unit s maximum power max c...

Page 298: ...Gree GMV6 DC Inverter VRF Units Service Manual 296 Appendix 5 Circuit Diagram GMV 224WM G X GMV 280WM G X and GMV 335WM G X ...

Page 299: ...Gree GMV6 DC Inverter VRF Units Service Manual 297 GMV 400WM G X GMV 450WM G X and GMV 504WM G X ...

Page 300: ...Gree GMV6 DC Inverter VRF Units Service Manual 298 GMV 560WM G X GMV 615WM G X and GMV 680WM G X Note Refer to the mark on the unit for the actual circuit diagram ...

Page 301: ...t exchangers of indoor units are connected in parallel as the evaporator of system It realizes the adjustment of the air temperature and humidity for indoor space through the return air circulation of the indoor unit when the indoor unit is in the heating mode all the four way valves of the outdoor unit module are switched to the energizing state the outdoor heat exchanger is used as the evaporato...

Page 302: ...Gree GMV6 DC Inverter VRF Units Service Manual 300 System principle diagram of GMV 400WM G X GMV 450WM G X and GMV 504WM G X ...

Page 303: ...Gree GMV6 DC Inverter VRF Units Service Manual 301 System principle diagram of GMV 560WM G X GMV 615WM G X and GMV 680WM G X ...

Page 304: ...de 16 Air by pass valve Gas bypass solenoid valve It is used to defrost the heat gas bypass and bottom of the outdoor heat exchanger 17 One way valve It is used to control the flow direction of refrigerant 18 Electronic expansion valve of the sub cooler It is used to control the liquid pipe refrigerant subcooling degree during the cooling operation of the system and reduce the loss of the pipeline...

Page 305: ...JF00304129 ...

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