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Gree GMV6 Series Service Manual
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Gree GMV6 Series Service Manual

Gree GMV6 Series Service Manual

Ultra heat mini dc inverter vrf units
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Ultra Heat GMV6 Mini DC Inverter VRF
Units
Capacity: 36000Btu/h~60000Btu/h
Rated Frequency: 60Hz
Operation Range: Cooling: -18*~54°C(0*~129°F)
Heating: -30~27°C(-22~81°F)
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Summary of Contents for Gree GMV6 Series

  • Page 1 Ultra Heat GMV6 Mini DC Inverter VRF Units Capacity: 36000Btu/h~60000Btu/h Rated Frequency: 60Hz Operation Range: Cooling: -18*~54°C(0*~129°F) Heating: -30~27°C(-22~81°F)

  • Page 2: Table Of Contents

    Contents Chapter 1 Product ........................ 2 1 Unit List ..........................2 2 Parameters .......................... 2 3 The Range of Production Working Temperature ..............3 Chapter 2 Commissioning ....................4 1 Commissioning Process ...................... 4 2 Safety Requirements ......................4 3 Unit Commissioning ......................5 4 Unit Function Settings .......................

  • Page 3: Safety Instructions

    Preface Thank you for purchasing Ultra Heat GMV6 Mini DC Inverter VRF Units. For correct operation, please read this manual carefully. This manual applies to Ultra Heat GMV6 Mini DC Inverter VRF Units. It clarifies the safety requirements, basic principles and implementation methods in engineering commissioning, troubleshooting, and after-sales maintenance.

  • Page 4: Chapter 1 Product

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Chapter 1 Product 1 Unit List 1.1 Models Product Code Model Power External view CN851W4090 GMV-V36WL/C-T(U) 208/230V ~60Hz CN850W1220 GMV-V48WL/C-T(U) 208/230V ~60Hz CN850W1210 GMV-V60WL/C-T(U) 208/230V ~60Hz 2 Parameters 2.1 Parameters of Models...

  • Page 5: Temperature Operating Range

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Note: ① Sound Pressure Level: Anechoic chamber conversion value, measured in a semi-anechoic room. During actual operation, the value may be higher due to ambient noise and echoes of the installation conditions.

  • Page 6: Chapter 2 Commissioning

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Chapter 2 Commissioning WARNING! Before performing operations (such as commissioning, maintenance, and repair) on the device, you need to shut down the unit and cut off the power and use a relevant instrument to ensure that the voltage at the power input terminal is zero, and the power indicator on the main board is off.

  • Page 7: Unit Commissioning

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3 Unit Commissioning 3.1 Preparation 3.1.1 Tools Name Picture Screwdrivers Wrench Hex key tool Pliers Vacuum pump Electronic balance Pressure gauge Multimeter...
  • Page 8 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.1.2 Files To record the installation and commissioning of the unit, all the following documents need to be prepared: minutes of the pre-commissioning scheme determining meeting, commissioning personnel record form, pre-commissioning checklist, commissioning data record form, and commissioning report.
  • Page 9 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Commissioning data record form Project name: Unit model: Debugger: Date: Rated capacity of Rated capacity of Total length of the the outdoor unit the indoor unit refrigerant pipe (kW):...
  • Page 10 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.2 Check Items after Installation and Test Operation 3.2.1 Check Items after Installation Check items Possible conditions due to improper installation Check Each part of the unit is installed securely? Unit may drop, shake or emit noise.
  • Page 11 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.2.2.2 Test Operation and Debugging Description of test operation procedures and main board display of ODU Description of each stage of debugging progress — Debugging code Code meaning and operation method...
  • Page 12 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Description of each stage of debugging progress — Debugging code Code meaning and operation method Progress Code Display status Outdoor component’s error. Besides “06”, the other blinking will display the related error code. After errors are...
  • Page 13 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Description of each stage of debugging progress — Debugging code Code meaning and operation method Progress Code Display status Ready for units to start debugging. Press main board’s Display 12/AP SW3 button to confirm startup of debugging.

  • Page 14: After Commissioning

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.2.4 Unit Commissioning by Using Multi-functional Debugger Step 1: Connect multi-functional debugger. For details, see the user manual of multi-functional debugger. Step 2: Click Unit Debug on the home page to enter the commissioning page.
  • Page 15 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.2.6 Reference Values of Unit Normal Operation Parameters (Commissioning Check) Debug item Parameter name Unit Reference Outdoor °C(°F) — temperature ⚫ When compressor starts, discharge temp in cool mode is within 70~105°C(158~221°F) and at least 10°C(50°F) higher than the...
  • Page 16 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Debug item Parameter name Unit Reference IDU ambient °C(°F) — temperature ⚫ According to ambient temperature, for a same IDU in cool mode, the inlet temp will be 1~7°C(34~45°F) lower than the outlet Indoor heat temperature, and 4~9°C(39~48°F) higher...

  • Page 17: Unit Function Settings

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 4 Unit Function Settings 4.1 DIP Switch Settings Code Name Meaning Default Setting Remarks Capacity DIP Defines the rated Depending on The DIP switch is set by the SA1_capacity switch capacity of the unit.
  • Page 18 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual (1) Be sure to set the DIP switch on the master unit. (2) Setting this DIP switch on non-master units in a refrigerating system is invalid and unnecessary. (3) Be sure to set the address DIP switch for centralized control (SA2_Addr-CC) on the master unit of a refrigerating system to "0000x".

  • Page 19: Function Buttons

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Note: ① DIP switch at the ON end indicates 0; ② DIP switch at the other end indicates 1; ③ × indicates invalid. (5) This DIP switch of different refrigerating systems cannot be set the same. Otherwise, an address conflict will occur and the unit will not operate.

  • Page 20: Function Description

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Names and Functions of the Buttons Button No. Code Function Selects the upper item. Down Selects the lower item. Confirm Confirms the selection. Back Returns to the previous operation.
  • Page 21 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual LED1 Function code Display status Blinks Press the SW1 up button and the SW2 down button on the unit to select the corresponding function/parameter: LED1 Function Name Function code...
  • Page 22 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual After entering refrigerant recycle, the outdoor unit automatically starts and recycles the refrigerant to the pipeline of the outdoor unit or indoor unit. Setting steps Step 1: Enter A2 refrigerant recycle, and ensure that the outdoor unit displays as follows:...
  • Page 23 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Step 1: Enter A2 refrigerant recycle, and ensure that the outdoor unit displays as follows: LED1 Current process Display status Blinks Step 2: When the default value 01 is displayed, press the SW1 up button and the SW2 down button to select the corresponding recycle mode.
  • Page 24 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Step 1: Enter A6 cooling/heating setting of the entire system, and ensure that the outdoor unit displays as follows: LED1 Current process Display status Blinks Step 2: Press the SW1 up button and the SW2 down button to select the corresponding cooling/heating mode.
  • Page 25 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Silence Mode Code Mode 11 Mode 12 Mode 13 Note: After a silence mode is set, the system capability will be attenuated. Therefore, the noise and the capability need to be balanced when a silence mode is selected.
  • Page 26 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Press the SW4 back button on the master module to return to the previous process or exit the function setting status. The default status is 00, that is, no silence.
  • Page 27 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Step 2: Press the SW1 up button and the SW2 down button to select the corresponding mode. LED1 Current process/mode Display status Blinks Blinks Step 3: After selecting the mode, press the SW3 confirm button. The outdoor unit displays as follows:...
  • Page 28 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Setting steps: Step 1: Enter n4 maximum output capability limit setting, and ensure that the outdoor unit displays as follows: LED1 Current process/mode Display status 10 or 09 or 08 Blinks Step 2: Press the SW1 up button and the SW2 down button to select the corresponding value.
  • Page 29 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 4.2.3.10 C9 Fan Failure Emergency Operation This function is an after-sales emergency setting when a fan on a dual-fan module works abnormally. It shields the abnormal fan in a short time to ensure the emergency operation of the system.
  • Page 30 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 4.2.4 Outdoor Unit Status Query The following functions can be queried: Function Code Function Name Fault query Parameter query Indoor unit engineering SN query Online indoor unit qty query...
  • Page 31 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual compressor driver module. Charging loop fault of the inverter compressor Four-way valve air backflow protection driver. Under voltage protection for DC bus of the High pressure low protection inverter outdoor fan driver...
  • Page 32 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual LED1 Function Code Display status Press the SW1 up button and the SW2 down button to select the corresponding query module and press the SW3 confirm button. The unit displays as follows:...
  • Page 33 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Parameter Code Parameter Name Remarks — Outlet temperature of accumulator — Oil return temperature — Inlet pipe temperature of the condenser Outlet pipe temperature of the — condenser Note: If a parameter value is negative, LED1 circularly displays negative value code "nE"...
  • Page 34 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 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 Introduction: This function directly uses the outdoor unit to query the quantity of online indoor units.
  • Page 35 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Note: Un indicates the unit barcode, while Pc indicates the controller barcode. After confirming the module, press the SW1 up button and the SW2 down button to select the barcode sequence.
  • Page 36 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 4.4 Fire Alarm Function Setting The VRF unit system reserves a fire alarm interface "CN419", 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.

  • Page 37: Chapter 3 Faults

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Chapter 3 Faults 4.1Error Indication Error Description Recommended Action Code Unit waiting for debugging. System must be placed in System must be placed in Status startup mode. startup mode. See page 8.
  • Page 38 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Malfunction of Outdoor Ambient Temperature Sensor 15K thermistor is either (RT7) (CN421 Blue) electrically open or shorted. Outdoor Error Use ohm chart to test thermistor / sensor. Page 97...
  • Page 39 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Malfunction of lack of IDU The system must have at least 50% connected capacity. Ensure all indoor units have System Error 208/230VAC between L1/L2. If CO on indoor, check D1/D2 wiring.
  • Page 40 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Malfunction of swing parts Check swing motor and swing Indoor Error louvers possibly jammed Malfunction of ODU / Also displays error code This code will display along with the malfunction error that Outdoor Error is causing the issue.
  • Page 41 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Malfunction of current detection circuit of fan drive Fan Motor Check See Page 68 Outdoor Error Phase-lacking of inverter fan Fan Motor Check See Page 81 Outdoor Error Malfunction of charging loop of fan drive...
  • Page 42 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Power is insufficient Check line voltage to the Indoor Error indoor unit For single control over multiple units, number of IDU is Wired controller is set to inconsistent (HBS network)
  • Page 43 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Check number of indoor units that are communicating. See page 32 This will display how many indoor units the unit Function is communicating with Heat pump unit See page 20 this setting allows...
  • Page 44 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Malfunction of drive temperature sensor of compressor Power off the ODU for 15 Minutes then power back on if code does not reset after unit Outdoor Error has been power cycled like this...

  • Page 45: Troubleshooting

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Alarm because valve is abnormal This is an indication; the service valves were not Debugging Code opened properly check both (Not an Error) valves to see if they are open press SW3 to continue commissioning.
  • Page 46 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual coil. This can be checked with the portable service tool, wired controller or temperature clamp at the inlet and outlet of the coil. • If there is less than a 2°F differential this indicates that the EEV may be overfeeding the coil.
  • Page 47 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 2.62 "E3" System Low Pressure Protection Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display N o t e :...
  • Page 48 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 2.61 "E4" Protection in Case of Too High Discharge Temperature of Compressor Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit...
  • Page 49 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual • Verify that the EEV coil is attached to the valve body properly. • Cycle power to the indoor or outdoor units depending on mode and listen for the EEV clicking of the EEV finding it’s home position.

  • Page 50: Non-Fault Type Troubleshooting

    (1) If an abnormal situation (such as peculiar smell) occurs, please stop the operation immediately and turn off the main power supply, and then contact Gree authorized maintenance center. If the unit continues to operate under abnormal situation, the air conditioner will be damaged, and an electric shock or fire accident may result.
  • Page 51 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Phenomenon Causes When the system is started or stopped for a short time, you can hear the sound of “sa——”; you can also This is the sound produced when the hear this sound for a short time after refrigerant stops or changes the flow.
  • Page 52 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Phenomenon Causes During cold weather heating operation, when Wired controller displays frost or ice may form on the outdoor unit heat Unit enters frost mode operation exchanger, the unit will automatically enter the A3 code defrost mode for a few minutes.

  • Page 53: Chapter 4 Maintenance

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Chapter 4 Maintenance WARNING! During the maintenance of a modular unit, all the outside units must be powered on and off concurrently. Avoid doing so to only some of the outdoor units.

  • Page 54: Vacuum Setup

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Once piping is complete, pressure test the system, start are 150 PSI and hold for 3 minutes. Next, increase the pressure to 325 PSI and hold for 5 minutes. Next, increase the pressure to 500 PSI and hold for 1 hour.

  • Page 55: Additional Refrigerant Charging

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 2.2 Additional Refrigerant Charging (1) The amount of refrigerant charged into the system before leaving the factory does not include the amount of refrigerant added to the pipelines and the outdoor unit.
  • Page 56 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Record the amount of refrigerant added to facilitate after-sales maintenance. After ensuring that the system does not leak and the compressor is not working, first charge the specified amount of R410A into the unit from the injection port of the outdoor unit liquid pipe valve until the required amount is reached.

  • Page 57: Inspection Of Key Parts

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3 Inspection of Key Parts 3.0 Power Specifications Description The power supplies of the compressor and fan comprise the following three parts: ① The specifications of the input power are 208/230V ~ 60Hz and Use of power to the main control board: earth line.
  • Page 58 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Specifications Description The power supplies of the compressor and fan comprise the following three parts: ① The specifications of the input power are 208/230V ~ 60Hz and Use of power to the main control board: earth line.

  • Page 59: Mechanical Inspection

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.0.1 Mechanical Inspection (1) Confirm that the unit power is disconnected. (2) Remove the electrical appliance cover. (3) Check whether the power cable is fixed on the wiring board.

  • Page 60: Temperature Sensors

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.1 Temperature Sensors Specifications Description Three types of temperature sensors of different specifications are The sensors are used to measure the temperature of the unit at different positions. used, including 50K, 20K and 15K.
  • Page 61 3.1.1 Mechanical Inspection (1) Confirm that the unit Power is disconnected. (2) Find the place corresponding to each sensor on the unit and check if the sensors are firmly fixed on the unit. 3.1.2 Electrical Inspection Measure the actual temperature and resistance of the temperature sensors and compare it with the characteristic curve of the temperature sensors to determine whether the thermocouple is normal.
  • Page 62 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 15K temperature sensor resistance - temperature curve Temperatur Resistanc e\°C e\KΩ 108.7 82.75 63.46 49.02 38.15 29.9 23.6 18.75 12.07 9.779 7.967 6.529 5.379 4.456 3.711 3.105 2.611 2.205 1.871...
  • Page 63 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 20K temperature sensor resistance - temperature curve Temperatu Resistanc re\°C e\KΩ 361.8 265.5 196.9 110.3 84.61 65.37 50.87 39.87 31.47 25.01 16.1 13.04 10.62 8.705 7.173 5.942 4.948 4.14 3.481...
  • Page 64 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 50K temperature sensor resistance - temperature curve Temperatur Resistanc e\°C e\KΩ 911.56 660.93 486.55 362.99 274.02 209.05 161.02 126.17 98.006 77.349 61.478 49.191 39.61 32.088 26.147 21.425 17.651 14.618 12.168...

  • Page 65: Solenoid Valve

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.2 Solenoid Valve Specifications Description ① The 4-way valve is used to switch between cooling mode and heating mode. If the 4-way valve is active, the Coils of different types are used on: unit works in heating mode, if the 4-way valve is inactive, the unit works in cooling mode.
  • Page 66 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.2.1 Mechanical Inspection (1) Confirm that the unit Power is disconnected. (2) Find the 4-way valve or solenoid valve, check whether the fixing screw is loose and whether the valve and coil have any apparent exceptions.

  • Page 67: Electronic Expansion Valve

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.3 Electronic Expansion Valve Specifications Description The 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.
  • Page 68 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.3.1 Mechanical Inspection Step 1: Switch off the power of the ODU. Step 2: Check whether the coil of the electronic expansion valve is firmly fixed on the electronic expansion valve.
  • Page 69 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.4 Fans Specifications Description The fans are powered by a DC inverter motor and can adjust the speed automatically The unit is equipped with two fans. The fans are connected to the main control board.
  • Page 70 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.4.1 Mechanical Inspection Step 1: Switch off the power of the ODU. Step 2: Check whether the connector between the fan motor and fan drive board is firmly connected.
  • Page 71 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.5 Compressor Specifications Description Models: QXAT-F400zN450 Compression refrigerant, recycling refrigerant. Models: GMV-V36WL/C-T(U)、GMV-V46WL/C-T(U)、GMV-V60WL/C-T(U) Circuit diagram Physical position...
  • Page 72 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.5.1 Diagnosis of Compressor Failures 3.5.1.1 When the unit can be started Step 1: If the unit can be started, check the faulty compressor's line current. Use a pressure gauge to measure the gas and liquid valve pressure and monitor the measured data on a PC.
  • Page 73 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Electronic expansion valve: When the unit is powered on and off each time, the electronic expansion valve needs to reset. Touch the valve with a hand to check if the valve core rotates.
  • Page 74 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 4-way valve: When it is normal, the temperature different between it and the four copper tubes connecting to the valve is obvious. When the 4-way valve works, obvious sound and vibration can be heard and felt.
  • Page 75 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual and conducting oil return, the 4-way valve produces obvious valve pushing sound. Do not touch the pipeline with hands. Otherwise, you may get scalded. Oil-return solenoid valve: It can be diagnosed based on the oil-return valve status displayed on the monitor program and the actual operation.
  • Page 76 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3: Point the black probe to the P needle file and the red probe to the V wiring terminal. In the normal condition, the multimeter will not beep. If it does, the drive board is damaged and needs to be replaced.
  • Page 77 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Measure the grounding resistance of each wiring terminal, which should be greater than 10 MΩ; otherwise, the compressor has an internal fault. Step 3: When the unit cannot be started properly, the solenoid valves of the system, including the electronic expansion valve and oil-return valve, need to be checked using the same method described above.
  • Page 78 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.6 Board 3.6.1 Main Board The main board is used to control the load of the ODU. Models: GMV-V60WL/C-T(U)、GMV-V48WL/C-T(U)、GMV-V36WL/C-T(U) Circuit diagram Layout of electrical appliance box Physical position...
  • Page 79 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 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.
  • Page 80 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.6.2 Compressor Drive Specifications Description － This part is used to control the operation of the compressor. Models: GMV-V60WL/C-T(U)、GMV-V48WL/C-T(U)、GMV-V36WL/C-T(U) Circuit diagram Layout of electrical appliance box Physical position...
  • Page 81 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual (1) Before the inspection: Find a correct digital multimeter and switch it to the diode gear. Power off the unit and wait two minutes. Disconnect the U, V and W cables of the compressor and N and AC-L power cables from the main board. Do not operate without waiting two minutes after the unit is powered off.
  • Page 82 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.6.3 Fan Drive Specifications Description － This part is used to control the operation of the fan. Models: GMV-V60WL/C-T(U)、GMV-V48WL/C-T(U)、GMV-V36WL/C-T(U) Circuit diagram Layout of electrical appliance box Physical position...
  • Page 83 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 1. Upper Fan Inspection Before the inspection: Find a correct digital multimeter and switch it to the diode gear. Power off the unit and wait two minutes. Disconnect the U1, V1 and W1 cables of the fans from the drive board.

  • Page 84: Pressure Sensor

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 3.7 Pressure Sensor Specifications Description Inspection of high-pressure temperature of the high-pressure sensor: 1. Control of compressor output capacity 2. Conversion and calculation of saturated condensing temperature 3. Protection high pressure 4.
  • Page 85 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Inspection procedure Preparations (1) Use the wired controller or remote controller to shut down the unit. (2) Remove the front cover and open the electrical appliance box. Inspection of low-pressure sensor (1) Connect the pressure gauge to the gas valve and check if the gas and liquid valves are open.

  • Page 86: Replacement Of Key Unit Parts

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 4 Replacement of Key Unit Parts 4.0 Key Parts Photo Name Function Core part of air conditioning system. It sucks low temperature and low pressure gas, compress it to...
  • Page 87 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Photo Name Function High pressure It used for storing the superfluous high pressure liquid refrigerant liquid during cooling process. storage tank Solenoid — valve It used for connecting indoor unit and outdoor unit, Cut-off valve and used for maintenance and installation.
  • Page 88 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 4.1 Removal of Key Parts Removal operation for panel Remark: Before removing the panel, please make sure that the unit is disconnected with the power Process Photo Operation Instruction ●...
  • Page 89 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Removal operation for blade Remark: Before removing the motor, please make sure that the unit is disconnected with the power. Process Photo Operation Instruction ● Loose screws fixing the panel 1.Remove grille...
  • Page 90 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Removal operation for blade Remark: Before removing the motor, please make sure that the unit is disconnected with the power. Process Photo Operation Instruction ● Assemble the unit in the the 5.Assemble unit...
  • Page 91 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Removal operation of compressor Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline and the power is disconnected. Process Photo Operation Instruction ● Take out the compressor and 4.Remove the...
  • Page 92 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Removal operation of compressor Remark: Before removing the compressor, please make sure that there’s no refrigerant inside the pipeline and the power is disconnected. Process Photo Operation Instruction ●...
  • Page 93 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Removal operation for 4-way valve Remark: Before removing the 4-way valve, please make sure that there’s no refrigerant inside the pipeline of system and then power is disconnected. Process...
  • Page 94 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Removal operation for electronic expansion valve Remark: Before removing the electronic expansion valve, please make sure that there’s no refrigerant in the pipeline of system and the power is disconnected...
  • Page 95 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Removal operation of gas liquid separator Remark: Before removing the gas liquid separator, please make sure that there’s no refrigerant inside the pipeline of system and disconnect the power...
  • Page 96 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Removal operation for plate heat exchanger Remark: Before removing the plate heat exchanger, please make sure that there’s no refrigerant inside the pipeline of system and disconnect the power...

  • Page 97: Explosive View And Parts List

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual 5 Explosive View and Parts List GMV-V36WL/C-T(U), GMV-V48WL/C-T(U) and GMV-V60WL/C-T(U) Parts list of GMV-V36WL/C-T(U), GMV-V48WL/C-T(U) and GMV-V60WL/C-T(U) Name Material code Coping 012049060098P Left Side Plate 012055060285P Brushless DC Motor...
  • Page 98 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Name Material code Pressure Sensor 430044060023 Connection Board 012077060725P Electric Box Assy 100002078277 Terminal Board 42200006005403 Terminal Board 42200006001201 Main Board 300027063015 Radiator 43003406008701 Filter Board 300020060111 Strainer 035021060019...

  • Page 99: Appendixes

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Appendixes Appendix 1 Temperature Senor Resistance and Temperature Relationship Table Environmental temperature sensor 15kΩ resistance ~ voltage correspondence table (including outdoor and indoor environment temperature sensors) °C °F Resistance Volts °C...
  • Page 100 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Volts °C °F °C °F Volts Resistance Resistance KΩ kΩ 22.53 1.319 0.825 3.128 21.51 1.356 0.802 3.133 20.54 1.393 0.779 3.137 19.63 1.429 0.758 3.141 18.75 1.467 0.737 3.145...
  • Page 101 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Volts Volts °C °F Resistance °C °C Resistance KΩ KΩ 4.139 2.586 0.292 3.237 3.99 2.607 0.286 3.238 3.848 2.626 0.279 3.24 3.711 2.646 0.273 3.241 3.579 2.664 0.266 3.242...
  • Page 102 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Resistance Voltage Resistance Voltage °C °F °C °F kΩ kΩ 129.9 0.44 2.265 2.964 0.462 2.194 2.974 116.5 0.484 2.125 2.983 110.3 0.507 2.059 2.992 104.6 0.53 1.996 3.001 99.13...
  • Page 103 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Resistance Voltage Resistance Voltage °C °F °C °F kΩ kΩ 16.1 1.828 0.6563 3.195 15.43 1.863 0.6395 3.198 14.79 1.897 0.6232 14.18 1.931 0.6074 3.203 13.59 1.965 0.5921 3.205 13.04...
  • Page 104 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Exhaust temperature sensor 50kΩ resistance ~ voltage correspondence table (including compressor top shell temperature sensor and air exhaust pipe temperature sensor) Resistance Voltage Resistance Voltage kΩ kΩ °C °F °C...
  • Page 105 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Resistance Resistance °C °F Voltage VDC °C °F Voltage VDC kΩ kΩ 34.57 1.209 1.039 3.137 32.98 1.246 1.01 3.141 31.47 1.282 0.9825 3.145 30.04 1.319 0.9556 3.15 28.68 1.356...

  • Page 106: Appendix 2 Refrigerant Temperature And Pressure Table

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Appendix 2 Refrigerant Temperature and Pressure Table Refrigerant R-410A °C °F PSIG °C °F PSIG °C °F PSIG...

  • Page 107: Appendix 3 Pressure Sensor Voltage And Pressure Table

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Appendix 3 Pressure Sensor Voltage and Pressure Table Black to Orange is the output voltage from the board. 5VDC Black to Green is feedback voltage and will read according to the table.
  • Page 108 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Volts Volts °C °F PSIG °C °F PSIG 0.229 1.834 0.242 1.884 0.255 1.937 0.268 1.989 0.282 2.042 0.297 2.098 0.312 2.153 0.328 2.21 0.344 2.268 0.36 2.327 0.377 2.388...
  • Page 109 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Low-pressure-transducer voltages (R410A) Volts Volts °C °F PSIG °C °F PSIG 0.369 1.301 0.373 1.337 0.377 1.373 0.383 1.413 0.389 1.451 0.393 1.491 0.399 1.533 0.405 1.575 0.411 1.619 0.419...
  • Page 110 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Volts Volts °C °F PSIG °C °F PSIG 0.935 4.091 0.961 4.189 0.987 4.289 1.015 4.393 1.043 4.497 1.073 4.603 1.103 4.713 1.133 4.823 1.165 4.937 1.197 5.051 1.231 5.175...

  • Page 111: Appendix 4 Electric Specifications

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Appendix 4 Electric Specifications (1) All electrical installation must be performed by qualified technicians in accordance with local laws, regulations and this user manual. (2) Use air conditioner specialized power supply and make sure that it is consistent with system’s rated voltage.
  • Page 112 Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Electrical Parameters： Maximum Over- Minimum Circuit Fuse Capacity Current Protection Ampacity Model Power Supply GMV-V36WL/C-T(U) 208/230V-1Ph-60Hz 33.8 GMV-V48WL/C-T(U) 208/230V-1Ph-60Hz 38.8 GMV-V60WL/C-T(U) 208/230V-1Ph-60Hz 38.8 Engineering Wiring of Power Supply and Communication Cable：...

  • Page 113: Appendix 5 Circuit Diagram

    Gree Ultra Heat GMV6 Mini DC Inverter VRF Units Service Manual Appendix 5 Circuit Diagram GMV-V36WL/C-T(U)、GMV-V48/C-T(U)、GMV-V60WL/C-T(U) Note: Refer to the mark on the unit for the actual circuit diagram.

  • Page 114: Appendix 6 Schematic Diagram

    Gree GMV6 DC Inverter VRF Units Service Manual Appendix 6 Schematic Diagram The working principle of Ultra Heat GMV6 Mini 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.

  • Page 115: Appendix 7 Names And Functions Of Components

    Gree GMV6 DC Inverter VRF Units Service Manual Appendix 7 Names and Functions of Components Name Main Functions The compressor changes its speed according to the actual system need for Compressor capacity adjustment. In the standby state, the oil temperature of the compressor is guaranteed to Crankcase heater prevent backflow.

  • Page 116: Appendix 8 Yap1F Remote Special Functions

    Gree GMV6 DC Inverter VRF Units Service Manual Appendix 8 YAP1F Remote Special Functions Setting Master Indoor Unit 1. Set Mode to Fan 2. Set Temp to 86°F or 30° C Press Down/Up 3 times quickly UC will display on indoor unit...
  • Page 117 $GREE GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI 519070 Add: West Jinji Rd,Qianshan Zhuhai,Guangdong,China Tel: (+86-756)8522218 Fax: (+86-756)8669426 E-mail: global@cn.gree.com www.gree.com JF00305377...

This manual is also suitable for:

Gmv-v36wl/c-t(u)Gmv-v48wl/c-t(u)Gmv-v60wl/c-t(u)Cn851w4090Cn850w1220Cn850w1210