Gree GMV-1015WM/G-U Service Manual Download Page 262

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Gree GMV6 DC Inverter VRF Units Service Manual

260

Step 1:

Disconnect the power and wait five minutes.

Step 2:

As shown in the figure, switch the multimeter to the diode gear. Point the black and red

probes to the following positions to check if the main board is normal.

Black probe

Red probe

Symptom

X5 (1)

X4 (2)

The main board is normal if the multimeter does not

beep.

CN9 (3)

CN9 (4)

The main board is normal if the multimeter does 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

beep.

CN58 (11)

CN17 (13)

The main board is normal if the multimeter does not

beep.

CN58 (10)

CN54 (12)

The main board is normal if the multimeter does not

beep.

CN58 (10)

CN17 (13)

The main board is normal if the multimeter does not

beep.

Summary of Contents for GMV-1015WM/G-U

Page 1: ...GMV6 DC Inverter VRF Units GC202104 I Capacity 22 4kW 272 0kW Rated Frequency 60Hz Operation Range Cooling 15 48 C Heating 25 24 C...

Page 2: ...aintenance 204 1 Precautions for Refrigerant Leakage 204 2 Refrigerant Charging 204 3 Refrigerant Charging Method 206 4 Inspection of Key Parts 209 5 Replacement of Key Unit Parts 266 6 Explosive View...

Page 3: ...in improper 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 I...

Page 4: ...20 22 22 GMV 1790WM G U 30 12 18 GMV 839WM G U 66 22 22 22 GMV 1845WM G U 32 10 22 GMV 895WM G U 68 22 22 24 GMV 1910WM G U 34 12 22 GMV 950WM G U 70 22 24 24 GMV 1975WM G U 36 14 22 GMV 1015WM G U 72...

Page 5: ...68H 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 Refrigerant type R410A R410A R410A R410A R410A Refriger...

Page 6: ...FV68H Refrige ration oil charge Gross L 6 1 7 2 7 2 7 2 Compressor charge L 1 1 1 1 2 1 1 2 1 1 2 The others L 5 5 5 5 Refrigerant type R410A R410A R410A R410A Refrigerant charge kg 8 8 8 3 8 3 Maxim...

Page 7: ...30 775 1690 1340 775 1690 930 775 1690 1340 775 1690 930 775 1690 1340 775 1690 930 775 1690 1340 775 1690 Packing dimensions W D H mm 1000 830 1855 1400 830 1855 1000 830 1855 1400 830 1855 1000 830...

Page 8: ...40 9 40 9 40 9 Refrigerant type R410A R410A R410A R410A Refrigerant charge kg 8 8 3 8 3 8 3 8 3 8 3 8 3 8 3 Maximum drive IDU NO unit 64 64 64 64 Gas pipe mm 38 1 38 1 38 1 41 3 Liquid pipe mm 19 05...

Page 9: ...ower input kW 11 90 11 90 15 80 11 90 13 50 15 80 11 90 15 80 15 80 13 50 15 80 15 80 Heating power input kW 13 60 13 60 16 90 13 60 15 35 16 90 13 60 16 90 16 90 15 35 16 90 16 90 Cooling current inp...

Page 10: ...V 335WM G U GMV 504WM G U GMV 615WM G U GMV 615WM G U GMV 450WM G U GMV 504WM G U GMV 560WM G U GMV 615WM G U GMV 400WM G U GMV 560WM G U GMV 615WM G U GMV 615WM G U GMV 400WM G U GMV 615WM G U GMV 61...

Page 11: ...charge kg 8 8 8 8 3 8 8 8 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 44 5 44 5 44 5 44 5 Liquid pipe mm 22 2 22 2 22 2 22 2 Outline dimensions W D H mm 1340 77...

Page 12: ...nsions W D 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 14...

Page 13: ...ration before commissioning Verification of installation Unit checking Commissioning 2 Safety Requirements Safety measures must be taken for outdoor operations All involved commissioning personnel and...

Page 14: ...e 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 Multimet...

Page 15: ...ng 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 Chec...

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 temperat...

Page 17: ...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 100 m with the outdoor u...

Page 18: ...oblem 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 pow...

Page 19: ...VC 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 th...

Page 20: ...ether 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...

Page 21: ...ample 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 detecti...

Page 22: ...cted 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 O...

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 Notice In the...

Page 24: ...sponding 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...

Page 25: ...fter 30s of 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...

Page 26: ...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 components inspec...

Page 27: ...Step 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 Pro...

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 Code Display status 10_ status judgment of main p...

Page 29: ...ipeline 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...

Page 30: ...ode 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...

Page 31: ...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...

Page 32: ...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...

Page 33: ...irm 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...

Page 34: ...ure 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...

Page 35: ...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 detect...

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 commi...

Page 37: ...ice 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 manu...

Page 38: ...ing 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 minut...

Page 39: ...ing 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...

Page 40: ...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 deta...

Page 41: ...op tube temperature of inverter compressor 2 6 Temperature of defrosting temperature sensor When the system is running in cooling mode the temperature of defrosting temperature sensor is 5 11 41 51 8...

Page 42: ...ase Power voltage is 208V then the rectified bus voltage is 208V 1 414 294V The normal deviation between the measured value and the calculated value within 15V 13 Fan operation frequency Hz Adjust the...

Page 43: ...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 D...

Page 44: ...ff 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...

Page 45: ...a and 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 System function settings a...

Page 46: ...his 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 f...

Page 47: ...ting 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 Blink...

Page 48: ...etting 1H On 00 Blinks 00 Blinks Efficient module rotation 4n On 00 Blinks 00 Blinks Adaptive control of noise 4q On 00 Blinks 00 Blinks Forced switch of the electric heater of an indoor unit 5L On 00...

Page 49: ...n 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 in...

Page 50: ...nt 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 Available mode...

Page 51: ...orced 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...

Page 52: ...OC Blinks A7 On 11 Blinks OC Blinks A7 On 12 Blinks OC Blinks Step 3 After selecting the corresponding silence mode press the SW3 confirm button The master module displays as follows LED1 LED2 LED3 Fu...

Page 53: ...tion This function sets the user required energy saving mode The default mode is capability priority control After energy saving mode is set the system capability will deteriorate Code Function Name 0...

Page 54: ...ode Display status Current process mode Display status Current status Display status n3 On 00 On 00 On If the defrosting condition is not met the module displays the set mode If the setting is complet...

Page 55: ...erating systems are controlled in a centralized manner by remote monitoring or a centralized controller this function sets the engineering numbers of indoor units and avoids their conflict among diffe...

Page 56: ...ks 1G On 01 Blinks OC Blinks 1G On 02 Blinks OC Blinks 1G On 03 Blinks OC Blinks 1G On 04 Blinks OC Blinks After selecting the corresponding basic module press the SW3 confirm button The module displa...

Page 57: ...he system will automatically exit the current screen and resume displaying the current standby status The one button drainage function is valid in running or standby status of the entire system After...

Page 58: ...in 5 minutes the system will automatically exit the current screen and the unit will resume displaying the current status If a basic module sets compressor failure emergency operation the status indi...

Page 59: ...n upon power failure and power on again The default value is 00 Then press the SW4 back button to return to the previous process During setting press SW4 to return to the previous process If the setti...

Page 60: ...of module 1 is shielded CA On 02 Blinks OC Blinks The operation of module 2 is shielded CA On 03 Blinks OC Blinks The operation of module 3 is shielded CA On 04 Blinks OC Blinks The operation of modu...

Page 61: ...sents emergency state of components The factory default is 00 LED1 LED2 LED3 Function code Display status Current process Display status Current status Display status 4J On 00 Blinks OC Blinks After s...

Page 62: ...otation 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 Curren...

Page 63: ...ssioned the commissioner sends a flag indicating whether the adaptive control of noise is valid The master unit memorizes this setting and does not clear it even upon power failure and power on again...

Page 64: ...elect the corresponding fan reverse dust removal mode LED1 LED2 LED3 Function code Display status Current process Display status Current status Display status 5L On 00 Blinks OC Blinks 5L On 01 Blinks...

Page 65: ...e parameter of the unit in any status The query method is as follows On the master unit press and hold the SW2 down button for over 5 seconds The master unit displays the current function setting stat...

Page 66: ...ture protection for compressor 2 29 IPM module protection for the inverter outdoor fan driver 11 Compressor 2 over current protection 30 Inverter outdoor fan startup failure 12 Shell roof high tempera...

Page 67: ...Blinks LED2 displays the module parameter code and LED3 displays the specific value The parameters and display sequence are listed below Outdoor ambient temperature master module is displayed by defau...

Page 68: ...uid outlet temperature 30 Outlet temperature of accumulator 31 Oil return temperature 32 Inlet pipe temperature of the condenser 33 Outlet pipe temperature of the condenser If a parameter value is neg...

Page 69: ...exit indoor unit engineering SN query in 30 minutes the system will automatically exit the current screen and the unit will resume displaying the current status 4 2 4 4 n9 Online Indoor Unit Qty Query...

Page 70: ...and the SW2 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 un...

Page 71: ...er 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 Restorati...

Page 72: ...g 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 inter...

Page 73: ...mperature 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 S...

Page 74: ...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 sy...

Page 75: ...h 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 Malfu...

Page 76: ...ation 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 Communica...

Page 77: ...r 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...

Page 78: ...atus 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...

Page 79: ...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 indoo...

Page 80: ...utdoor 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 u...

Page 81: ...rly 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...

Page 82: ...ly 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 d...

Page 83: ...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 F...

Page 84: ...rly 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 disp...

Page 85: ...properly 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 Faul...

Page 86: ...ly 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 diag...

Page 87: ...erly 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 diagnos...

Page 88: ...ce 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 Faul...

Page 89: ...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 F...

Page 90: ...ntrol board 2 27 bd Subcooler air inlet temperature sensor error Error display ODU main board IDU wired controller IDU receive light board will display Applicable model all ODUs Error judgment conditi...

Page 91: ...than the low pressure the unit will report that the high and low pressure is wrongly connected Possible reasons The resistance of high pressure sensor is abnormal the test value is high The resistance...

Page 92: ...Controller Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor unit display Fault diagnosis There is no communication between the outdoor unit and indoor un...

Page 93: ...ication 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 indoo...

Page 94: ...lace the main control board Whether the outdoor unit s compressor drive board is normal Yes 2 32 C3 Communication Fault Between the Primary Controller and Inverter Fan Driver Fault display main board...

Page 95: ...ain control board may be abnormal Yes Replace the main control board Whether the outdoor unit s fan drive board is normal Yes 2 33 C4 Indoor Unit Loss Fault Fault display main board of outdoor unit wi...

Page 96: ...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 o...

Page 97: ...its 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 reli...

Page 98: ...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...

Page 99: ...the network After redialing 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...

Page 100: ...oard detects the master DIP switch SA8 and determines whether it is the master When multiple master units are detected in the multi module communication network the fault is generated Possible causes...

Page 101: ...s SA2 to be different Abnormal DIP switch or main board Troubleshooting Yes CJ System Address Code Conflict Keep the SA2 DIP switch to be 00000 for only one master unit and set that for other master u...

Page 102: ...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 46 Cb IP Address Assignment Over...

Page 103: ...exchanger main board will display Applicable model all mode exchangers Error judgment condition and method For the mode exchanger no ODU communication is detected in 1 consecutive minute Possible rea...

Page 104: ...between mode exchanger main control board and ODU main control board terminal For the mode exchanger with several control boards the contact between the main board and communication terminal of subsid...

Page 105: ...the AD value of temperature sensor through temperature sensor detecting circuit and judge the range of AD value If the sampling AD value exceeds upper limit and lower limit in 5 seconds continuously r...

Page 106: ...ers and plug it tightly The detection circuit may operate improperly Yes Replace the main control board No Is the problem solved after the ambient temperature sensor is replaced Whether the interface...

Page 107: ...eign matters No 2 54 d5 Middle Part Temperature Sensor Fault Reserved 2 55 d6 Outlet Pipe Temperature Sensor Fault Fault display wired controller of indoor unit and receiver of indoor unit display Fau...

Page 108: ...pipe temperature sensor gets loose or contains foreign matters No 2 56 d7 Humidity Sensor Fault Fault display wired controller of indoor unit and receiver of indoor unit display Fault diagnosis The t...

Page 109: ...the interface terminal between the main board and humidity sensor gets loose or contains foreign matters No 2 57 d8 Water Temperature Sensor Fault Reserved 2 58 d9 Jumper Cap Fault Fault display wire...

Page 110: ...ault 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...

Page 111: ...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...

Page 112: ...mperature 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...

Page 113: ...sor interface terminal to see if it is loose or any foreign objects inside If yes reconnect it after treatment Step 2 check if the temperature sensor is abnormal if yes replace the temperature sensor...

Page 114: ...ting circuit and judge the range of AD value If the sampling AD value exceeds upper limit and lower limit in 30 seconds continuously report the error Possible reasons Poor contact between temperature...

Page 115: ...s retighten it or replace the temperature sensor Step 3 If air exist in the circulated waterway of hydro box if yes drain it again Step 4 If the above tests are normal then the detecting circuit might...

Page 116: ...unit with swing assy Error judgment condition and method Report alarm through judging the status of limit switch 1 and 2 When the swing structure is faulted the indoor unit will not stop the display b...

Page 117: ...ter 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 out...

Page 118: ...nd 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 out...

Page 119: ...0 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 actio...

Page 120: ...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 co...

Page 121: ...or 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 valv...

Page 122: ...he 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 o...

Page 123: ...2 turn on the unit according to the IDU capacity and quantity in previous protection status after confirming the coil of IDU and ODU expansion valve is correctly connected disconnect the power then re...

Page 124: ...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 abnormal Y...

Page 125: ...or 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...

Page 126: ...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 Y...

Page 127: ...eds 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 senso...

Page 128: ...eds 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 senso...

Page 129: ...eds 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 senso...

Page 130: ...eds 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 senso...

Page 131: ...eds 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 senso...

Page 132: ...eds 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 senso...

Page 133: ...e 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...

Page 134: ...e 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...

Page 135: ...e 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...

Page 136: ...e 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...

Page 137: ...e 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...

Page 138: ...e 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...

Page 139: ...ds 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 sens...

Page 140: ...ds 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 sens...

Page 141: ...gn objects retighten it after treatment Detecting circuit might be abnormal Yes Replace the main control board of mode exchange box No Replace the temperature sensor directly is the error disappeared...

Page 142: ...board of the outdoor unit displays H7 IPM over temperature protection for the fan drive 2 digit digital LED of the main control board of the outdoor unit displays H8 Current detection circuit fault o...

Page 143: ...lt 2 97 H2 Power Voltage Protection for the Fan Drive Board Fault display wired controller of indoor unit displays Fault diagnosis Check the fault code displayed on the wired controller of the indoor...

Page 144: ...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 abno...

Page 145: ...nverter 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 t...

Page 146: ...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...

Page 147: ...git 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 Te...

Page 148: ...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...

Page 149: ...hooting 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 Y...

Page 150: ...Detection 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 t...

Page 151: ...rd 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 HL it indicates the under voltage protection for the DC b...

Page 152: ...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 be...

Page 153: ...s 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 modu...

Page 154: ...till higher than 60 the compressor may occur normal overcurrent protection In this case please check if the fan operates normally if ambient temperature range is normal and if power supply is normal 2...

Page 155: ...wired controller of indoor unit and receiver of indoor unit display Fault diagnosis When the operating current of the compressor detected by the current sensor or circuit exceeds the limit the unit wi...

Page 156: ...till higher than 60 the compressor may occur normal overcurrent protection In this case please check if the fan operates normally if ambient temperature range is normal and if power supply is normal 2...

Page 157: ...l Troubleshooting J3 Compressor 3 overcurrent protection Compressor is abnormal Yes Yes Compressor is abnormal No Replace drive module If compressor operates to the lowest frequency while system high...

Page 158: ...l Troubleshooting J4 Compressor 4 overcurrent protection Compressor is abnormal Yes Yes Compressor is abnormal No Replace drive module If compressor operates to the lowest frequency while system high...

Page 159: ...l Troubleshooting J5 Compressor 5 overcurrent protection Compressor is abnormal Yes Yes Compressor is abnormal No Replace drive module If compressor operates to the lowest frequency while system high...

Page 160: ...l Troubleshooting J6 Compressor 6 overcurrent protection Compressor is abnormal Yes Yes Compressor is abnormal No Replace drive module If compressor operates to the lowest frequency while system high...

Page 161: ...nd 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...

Page 162: ...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 operati...

Page 163: ...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...

Page 164: ...de 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...

Page 165: ...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 i...

Page 166: ...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 indica...

Page 167: ...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 diagra...

Page 168: ...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...

Page 169: ...ted 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...

Page 170: ...r 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 faul...

Page 171: ...em Possible 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 Un...

Page 172: ...egrated 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 wir...

Page 173: ...that it cannot recognize such as floor heating in a modular DC inverter VRF system In this case to troubleshoot this fault you can remove the involved indoor units or change the outdoor unit to make...

Page 174: ...plicable model hydro box Error judgment condition and method When setting the corresponding relationship for the floor heating shunt valve and IDU the generator shall detect and judge the project code...

Page 175: ...wrong Troubleshooting Step 1 check if the indoor unit connected to the wired controller which controls multiple indoor units in the same branch of the same mode exchanger if no please connect the ind...

Page 176: ...nd 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 ener...

Page 177: ...nit 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 ou...

Page 178: ...sible causes Troubleshooting not required 2 142 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...

Page 179: ...U IPM module protection Error display ODU main board and IDU wired controller will display Applicable model external drive DC fan Error judgment condition and method Check the error code on the displa...

Page 180: ...ign objects or the motor shaft is rusty The fan is damaged please replace the fan Other errors occur at the Same time e g the IDU non synchronism protection o7 Yes Yes Yes Yes 2 147 o7 IDU non synchro...

Page 181: ...the fan is blocked due to foreign objects or the motor shaft is rusty The fan is damaged please replace the fan Other errors occur at the same time e g the IPM module protection o3 Yes Yes Yes Yes Ye...

Page 182: ...onfirm and replace the faulted board No 2 149 o9 IDU main control communication error Error display ODU main board and IDU wired controller will display Applicable model multi VRF IDU with DC motor Er...

Page 183: ...t according to the corresponding troubleshooting methods Possible causes Compressor drive module reset protection 2 digit digital LED of the main control board of the outdoor unit displays P3 Temperat...

Page 184: ...nput Voltage Protection for the Compressor Drive Board Fault display wired controller of indoor unit displays Fault diagnosis If fault code displayed on the wired controller of the indoor unit is P2 c...

Page 185: ...P5 Inverter 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 cont...

Page 186: ...e 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 s...

Page 187: ...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 compresso...

Page 188: ...m 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 2 157 P8 IPM Over Temperature P...

Page 189: ...screws are tightened and whether the IPM module is coated with thermal grease No 2 158 P9 Loss of Synchronization Protection for Inverter Compressor Fault display main board of outdoor unit displays F...

Page 190: ...h 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 whet...

Page 191: ...ooting 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 i...

Page 192: ...V the unit triggers protection against faults Possible causes Power voltage is lower than 200V or 360V for 460V voltage Compressor drive board is abnormal Troubleshooting PL Compressor drive DC bus l...

Page 193: ...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 sys...

Page 194: ...oor 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...

Page 195: ...ng 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 2 166 U4 Refrigerant...

Page 196: ...l 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...

Page 197: ...eceiver 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...

Page 198: ...hooting Re dial the DIP switch according to the DIP switch table 2 172 UE Auto Refrigerant Charging Void Fault display main board of outdoor unit wired controller of indoor unit and receiver of indoor...

Page 199: ...nge of AD value If the sampling AD value exceeds upper limit and lower limit in 5 seconds continuously report the error Possible reasons Poor contact between air inlet temperature sensor and main boar...

Page 200: ...peared Check the terminal between main board and IFD to see if it is loose or any foreign objects inside No 2 176 y8 Indoor air box sensor general error Error display ODU main board and IDU wired cont...

Page 201: ...abnormal test data No Is the error disappeared No Replace the main board Yes 2 177 Ineffective Cooling and Heating Applicable models all indoor units Fault diagnosis 1 In cooling mode when the electro...

Page 202: ...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 otherwi...

Page 203: ...05 or higher Possible reasons The ambient temperature is 55 or higher The temperature of the compressor is 105 or higher High pressure sensor is abnormal Temperature sensor is abnormal Troubleshooting...

Page 204: ...cooling or heating Air inlet or air outlet of indoor and outdoor units is blocked Clear obstructions Improper temp setting Adjust setting at remote controller or wired controller Fan speed is set too...

Page 205: ...compressor changes This is caused by changes in compressor operating frequency During the operation of the unit or after the operation is started or stopped a continuous sa sound can be heard This is...

Page 206: ...ion 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 charg...

Page 207: ...kg 0 LBS If all fresh air indoor units are mixed with the general VRF indoor units charge the refrigerant according to the refrigerant charging method of the general indoor unit For example1 Outdoor u...

Page 208: ...cuum drying work Step 2 Once vacuum drying is completed close the high pressure gauge valve and the low pressure gauge valve Disassemble the intermediate gauge pipe and the vacuum pump connection end...

Page 209: ...to 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...

Page 210: ...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 r...

Page 211: ...are 440 460V 3 60Hz earth line The drive board can convert AC power to DC power of about 640 V 1 41 x power voltage DC AC three phase inverter Use of power to the main control board Phase protection...

Page 212: ...Gree GMV6 DC Inverter VRF Units Service Manual 210 Models GMV 400WM G U GMV 450WM G U GMV 504WM G U...

Page 213: ...t power are 440 460V 3 60Hz earth line The drive board can convert AC power to DC power of about 640 V 1 41 x power voltage DC AC three phase inverter Use of power to the main control board Phase prot...

Page 214: ...Hz earth line The drive board can convert AC power to DC power of about 640 V 1 41 x power voltage DC AC three phase inverter Use of power to the main control board Phase protection Providing 440 460V...

Page 215: ...he power cable from 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...

Page 216: ...n 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...

Page 217: ...s 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 U GMV 450W...

Page 218: ...s 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 U GMV 615W...

Page 219: ...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 corresp...

Page 220: ...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...

Page 221: ...5 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...

Page 222: ...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...

Page 223: ...ng 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 T...

Page 224: ...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...

Page 225: ...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 o...

Page 226: ...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 o...

Page 227: ...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...

Page 228: ...penness 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...

Page 229: ...Gree GMV6 DC Inverter VRF Units Service Manual 227 Models GMV 400WM G U GMV 450WM G U GMV 504WM G U...

Page 230: ...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 valv...

Page 231: ...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...

Page 232: ...aced 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 t...

Page 233: ...ns 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 temp...

Page 234: ...Gree GMV6 DC Inverter VRF Units Service Manual 232...

Page 235: ...Gree GMV6 DC Inverter VRF Units Service Manual 233 Models GMV 400WM G U GMV 450WM G U GMV 504WM G U Circuit diagram Layout of electrical appliance box Physical position...

Page 236: ...Gree GMV6 DC Inverter VRF Units Service Manual 234 Models GMV 560WM G U GMV 615WM G U GMV 680WM G U Circuit diagram Layout of electrical appliance box Physical position...

Page 237: ...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 me...

Page 238: ...Gree GMV6 DC Inverter VRF Units Service Manual 236 Models GMV 224WM G U GMV 280WM G U GMV 335WM G U Circuit diagram Physical position...

Page 239: ...Gree GMV6 DC Inverter VRF Units Service Manual 237 Models GMV 400WM G U GMV 450WM G U GMV 504WM G U Circuit diagram Physical position...

Page 240: ...Gree GMV6 DC Inverter VRF Units Service Manual 238 Models GMV 560WM G U GMV 615WM G U GMV 680WM G U Circuit diagram Physical position...

Page 241: ...measure the gas and liquid 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 in...

Page 242: ...quency is 60 Hz the power curve corresponding to the evaporation temperature and condensation temperature is shown as follows When the compressor frequency is 90 Hz the power curve corresponding to th...

Page 243: ...er frequency the current curve can be obtained through interpolation calculation of the above frequency 2 Inverter compressor DA80PHDG A1Y2 When the compressor frequency is 30 Hz the current curve cor...

Page 244: ...ration temperature and condensation temperature is shown as follows When the compressor is working at another frequency the current curve can be obtained through interpolation calculation of the above...

Page 245: ...oil flows in the tube and check the pipeline temperature Diagnosis method 1 Electronic expansion valve When the unit is powered on and off each time the electronic expansion valve needs to reset Touch...

Page 246: ...part of the electronic expansion valve and check whether the resetting of the unit can be clearly felt 2 4 way valve When it is normal the temperature different between it and the four copper tubes c...

Page 247: ...in the cooling mode C indicates that the pipeline is in the high pressure and high temperature status while E and S indicate that the pipeline is in the low pressure and low temperature status when t...

Page 248: ...the valve is obvious Oil return valve 1 Oil return valve 2 Auxiliary oil return valve Step 4 Test the compressor drive board IPM module 1 Disconnect the power and wait five minutes and unplug the com...

Page 249: ...he 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...

Page 250: ...ther 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 A1Y2 is...

Page 251: ...sor 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 U GMV 280...

Page 252: ...Gree GMV6 DC Inverter VRF Units Service Manual 250 Models GMV 400WM G U GMV 450WM G U GMV 504WM G U Circuit diagram Layout of electrical appliance box Physical position...

Page 253: ...Gree GMV6 DC Inverter VRF Units Service Manual 251 Models GMV 560WM G U GMV 615WM G U GMV 680WM G U Circuit diagram Layout of electrical appliance box Physical position...

Page 254: ...r 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 P...

Page 255: ...rive 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 U GMV 280WM G U GMV...

Page 256: ...Gree GMV6 DC Inverter VRF Units Service Manual 254 Models GMV 400WM G U GMV 450WM G U GMV 504WM G U Circuit diagram Layout of electrical appliance box Physical position...

Page 257: ...Gree GMV6 DC Inverter VRF Units Service Manual 255 Models GMV 560WM G U GMV 615WM G U GMV 680WM G U Circuit diagram Layout of electrical appliance box Physical position...

Page 258: ...onding 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 pa...

Page 259: ...Gree GMV6 DC Inverter VRF Units Service Manual 257 Models GMV 224WM G U GMV 280WM G U GMV 335WM G U Circuit diagram Layout of electrical appliance box Physical position...

Page 260: ...Gree GMV6 DC Inverter VRF Units Service Manual 258 Models GMV 400WM G U GMV 450WM G U GMV 504WM G U Circuit diagram Layout of electrical appliance box Physical position...

Page 261: ...Gree GMV6 DC Inverter VRF Units Service Manual 259 Models GMV 560WM G U GMV 615WM G U GMV 680WM G U Circuit diagram Layout of electrical appliance box Physical position...

Page 262: ...ot 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...

Page 263: ...lue and calculation 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 outp...

Page 264: ...Gree GMV6 DC Inverter VRF Units Service Manual 262...

Page 265: ...Gree GMV6 DC Inverter VRF Units Service Manual 263 Models GMV 400WM G U GMV 450WM G U GMV 504WM G U Circuit diagram Layout of electrical appliance box Physical position...

Page 266: ...Gree GMV6 DC Inverter VRF Units Service Manual 264 Models GMV 560WM G U GMV 615WM G U GMV 680WM G U Circuit diagram Layout of electrical appliance box Physical position...

Page 267: ...e 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...

Page 268: ...l 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 bulk...

Page 269: ...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...

Page 270: ...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 GMV...

Page 271: ...tting 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 th...

Page 272: ...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 install...

Page 273: ...nit 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 engin...

Page 274: ...appliance box cover of the compressor must be intact 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 o...

Page 275: ...ng 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 auxi...

Page 276: ...ontainer 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 t...

Page 277: ...ding 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...

Page 278: ...ors 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 se...

Page 279: ...osen 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 ga...

Page 280: ...s 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 Checkin...

Page 281: ...e 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 p...

Page 282: ...ce 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...

Page 283: ...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 by...

Page 284: ...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 joi...

Page 285: ...d for GMV 280WM G U 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...

Page 286: ...lows 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 g...

Page 287: ...ng to the circuit diagram and make sure that all the electrical parts are wired correctly Step 18 Startup commissioning Perform the startup commissioning separately when the unit is working in cooling...

Page 288: ...line communication line between the master unit and the drive communication line between the compressor drive and fan drive compressor drive output 18 VDC bridge rectifier output P bridge rectifier o...

Page 289: ...ews on the compressor drive as shown in the figure below Installation procedure 1 Replace the compressor drive Before the replacement apply some silicone tape onto the IPM module Apply some silicone t...

Page 290: ...rvice Manual 288 U blue V yellow W red Connect to a reactor and do not distinguish by polarity 3 Please set the dialing code of the after sales accessories to the correct state according to the dialin...

Page 291: ...ations 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 front panel by referring to 5...

Page 292: ...rn pipe of the evaporator Installation procedure 1 Install the new 4 way valve to the exact position 2 Connect the new 4 way valve to the pipeline 3 When welding the 4 way valve wrap the valve body wi...

Page 293: ...there is no residual refrigerant in the unit Remove the old electronic expansion valve 4 Weld and loosen the connecting tube of the electronic expansion valve and then pull the connecting tube off Wh...

Page 294: ...e 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 upper and bottom panels by referring to 5 1...

Page 295: ...t s front panel by referring to 5 1 1 Removing the Unit Panel Removing procedure 1 Weld and loosen the two connection points of the gas liquid separator and then pull the connecting tube off When weld...

Page 296: ...changer bracket fixing screws and take out the plate heat exchanger and the bracket as a whole Installation procedure 1 Fix the plate heat exchanger and the screws of the bracket and then fix the whol...

Page 297: ...essure sensor in the correct position fix the fluorine nozzle with a wrench and tighten it with another wrench 2 Then insert the plastic plug of the pressure sensor into the correct position and a cli...

Page 298: ...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 u...

Page 299: ...pe 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 sole...

Page 300: ...witch 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 bl...

Page 301: ...2 Install the blades by referring to the 5 15 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...

Page 302: ...1 Removing and Installing the Unit Panel 1 buckle 2 spring hook 5 18 Removing and Installing Condenser Preparations 1 Use the power circuit breaker to switch off the power of the GMV6 VRF system 2 Ma...

Page 303: ...x 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 scre...

Page 304: ...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 fo...

Page 305: ...570412406 1 6 Cover Plate 012035000236P 2 7 Nozzle for Adding Freon 06120012 1 8 Nozzle for Adding Freon R410A 06123006 1 9 One Way Valve 071001060007 1 10 4 Way Valve 43000339 1 11 Filter 07218603 1...

Page 306: ...e Fitting 4304413274 1 41 Electric Expand Valve Fitting 4304413248 1 42 Electric Expand Valve Fitting 072002000011 1 43 Magnet Coil electromagnetic valve 07200106000811 1 44 Magnet Coil electromagneti...

Page 307: ...e for Adding Freon 06120012 2 7 Nozzle for Adding Freon 035114060003 1 8 Discharge Charge Valve 07334100002 2 9 One Way Valve 071001060007 1 10 4 Way Valve 43000339 1 11 Filter 07218603 1 12 Rear Gril...

Page 308: ...072010060002 1 41 Magnet Coil electromagnetic valve 07200106000811 1 42 Magnet Coil electromagnetic valve 072001060007 1 43 Magnet Coil electromagnetic valve 07200106000812 1 44 Electric Expand Valve...

Page 309: ...Nozzle for Adding Freon 035114060003 1 8 Discharge Charge Valve 07334100002 2 9 One Way Valve 071001060008 1 10 4 Way Valve 43000412 1 11 Filter 07218603 1 12 Cover Plate 012035000247P 1 13 Rear Grill...

Page 310: ...ic valve 07200106000812 1 45 Electric Expand Valve Fitting 4304413274 1 46 Electric Expand Valve Fitting 4304413269 1 47 Electric Expand Valve Fitting 4304413220 1 48 Electric Expand Valve Fitting 072...

Page 311: ...71 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...

Page 312: ...79 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...

Page 313: ...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...

Page 314: ...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 18...

Page 315: ...34 Exhaust temperature sensor 50k resistance voltage correspondence table including compressor top shell temperature sensor and air exhaust pipe temperature sensor Temperature C Resistance k Voltage V...

Page 316: ...02 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...

Page 317: ...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 16...

Page 318: ...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...

Page 319: ...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...

Page 320: ...ute 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...

Page 321: ...37 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...

Page 322: ...GMV 450WM G U 440 460V 3 60Hz 30 24 2 30 4 4 0 GMV 504WM G U 440 460V 3 60Hz 30 25 30 4 4 0 GMV 560WM G U 440 460V 3 60Hz 40 36 2 40 4 6 0 GMV 615WM G U 440 460V 3 60Hz 40 38 40 4 6 0 GMV 680WM G U 4...

Page 323: ...10 0 4 10 0 GMV 2040WM G U 680 680 68 0 440 460V 3 60Hz 45 45 45 40 9 40 9 40 9 45 45 45 4 10 0 4 10 0 4 1 0 0 GMV 2069WM G U 335 504 61 5 615 440 460V 3 60Hz 20 30 40 40 21 0 25 0 38 0 38 0 20 30 40...

Page 324: ...Gree GMV6 DC Inverter VRF Units Service Manual 322 Appendix 5 Circuit Diagram GMV 224WM G U GMV 280WM G U and GMV 335WM G U...

Page 325: ...Gree GMV6 DC Inverter VRF Units Service Manual 323 GMV 400WM G U GMV 450WM G U and GMV 504WM G U...

Page 326: ...Gree GMV6 DC Inverter VRF Units Service Manual 324 GMV 560WM G U GMV 615WM G U and GMV 680WM G U Note Refer to the mark on the unit for the actual circuit diagram...

Page 327: ...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...

Page 328: ...Gree GMV6 DC Inverter VRF Units Service Manual 326 System principle diagram of GMV 400WM G U GMV 450WM G U and GMV 504WM G U...

Page 329: ...Gree GMV6 DC Inverter VRF Units Service Manual 327 System principle diagram of GMV 560WM G U GMV 615WM G U and GMV 680WM G U...

Page 330: ...e 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 refrige...

Page 331: ...JF00304610...

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Gree GMV-1015WM/G-U, Service Manual

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