Gree GMV-VQ680WM/C-X Service Manual
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Gree GMV-VQ680WM/C-X Service Manual

Hr dc inverter vrf units
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GMV6 HR DC Inverter VRF Units
Capacity: 22.4kW~246.0kW
Rated Frequency: 50Hz / 60Hz
Operation Range: Cooling: -10~55°C
Heating: -25~24°C

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Summary of Contents for Gree GMV-VQ680WM/C-X

  • Page 1 GMV6 HR DC Inverter VRF Units Capacity: 22.4kW~246.0kW Rated Frequency: 50Hz / 60Hz Operation Range: Cooling: -10~55°C Heating: -25~24°C...

  • Page 2: Table Of Contents

    Gree GMV6 HR DC Inverter VRF Units Service Manual Contents Preface ..........................1 Safety Instructions ....................... 1 Chapter 1 Product ........................ 2 1 Unit List ..........................2 2 Parameters ........................4 3 The Range of Production Working Temperature ............. 13 Chapter 2 Commissioning ....................

  • Page 3: Preface

    (2) The final right to interpret for this instruction manual belongs to Gree Electric Appliances Inc. of Zhuhai.

  • Page 4: Chapter 1 Product

    GMV-VQ504WM/C-X 380-415V 3N~50/60Hz CN851W2380 GMV-VQ560WM/C-X 380-415V 3N~50/60Hz CN851W3150 GMV-VQ615WM/C-X 380-415V 3N~50/60Hz CN851W2470 1.1.2 Combined Modules Standard Combination Model Standard Combination Model GMV-VQ1630WM/C-X 10+14 GMV-VQ680WM/C-X 14+22+22 GMV-VQ1680WM/C-X 10+16 GMV-VQ730WM/C-X 16+22+22 GMV-VQ1734WM/C-X 10+18 GMV-VQ784WM/C-X 18+22+22 GMV-VQ1790WM/C-X 10+20 GMV-VQ840WM/C-X 20+22+22 GMV-VQ895WM/C-X GMV-VQ1845WM/C-X 10+22...
  • Page 5 Gree GMV6 HR DC Inverter VRF Units Service Manual 1.2 Mode Exchange Box Model Appearance Product Code Power Supply NCHS1D EN01600110 220-240V ~ 50/60Hz NCHS2D EN01600090 220-240V ~ 50/60Hz NCHS4D EN01600070 220-240V ~ 50/60Hz NCHS8D EN01600100 220-240V ~ 50/60Hz 1.3 Hydro Box...

  • Page 6: Parameters

    Gree GMV6 HR DC Inverter VRF Units Service Manual 1.4 Water Tank Model Product Code Power Supply Appearance SXTVD300LCJ2/A-K ER20000350 230V~ 50Hz 2 Parameters 2.1 Parameters of Outdoor Unit 2.1.1 Parameters of Basic Modules Model GMV-VQ224WM/C-X GMV-VQ280WM/C-X GMV-VQ335WM/C-X GMV-VQ400WM/C-X Product Code...
  • Page 7 Gree GMV6 HR DC Inverter VRF Units Service Manual GMV-VQ450WM/C- GMV-VQ560WM/C- Model GMV-VQ504WM/C-X GMV-VQ615WM/C-X CN851W2850 CN851W2380 CN851W3150 Product Code CN851W2470 Cooling Rated 45.00 50.40 56.00 61.50 capacity Rated 23.5 31.00 31.00 33.00 Heating capacity Max. 50.00 56.50 63.00 69.00 Outdoor static pressure...
  • Page 8 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.1.2 Parameters of Combined Modules GMV-VQ680WM/ GMV-VQ730WM/ GMV-VQ784WM/ GMV-VQ840WM/ GMV-VQ895WM/ Model 10+14 10+16 10+18 10+20 10+22 Combination GMV-VQ280WM/ GMV-VQ280WM/ GMV-VQ280WM/ GMV-VQ280WM/ GMV-VQ280WM/ mode C-X+GMV-VQ40 C-X+GMV-VQ45 C-X+GMV-VQ50 C-X+GMV-VQ56 C-X+GMV-VQ61 0WM/C-X 0WM/C-X 4WM/C-X...
  • Page 9 Gree GMV6 HR DC Inverter VRF Units Service Manual GMV-VQ1015WM/C- GMV-VQ1065WM/C- GMV-VQ1119WM/C- Model GMV-VQ950WM/C-X gas pipe Low pressure gas Φ31.8 Φ38.1 Φ38.1 Φ38.1 pipe Φ19.05 Φ19.05 Φ19.05 Φ19.05 Liquid pipe Outline 930×775×1690+ 1340×775×1690+ 1340×775×1690+ 1340×775×1690+ dimensions 1340×775×1690 1340×775×1690 1340×775×1690 1340×775×1690 (W ×...
  • Page 10 Gree GMV6 HR DC Inverter VRF Units Service Manual GMV-VQ1400WM/C- GMV-VQ1455WM/C- GMV-VQ1510WM/C- GMV-VQ1565WM/C- Model Rated 75.0 80.2 82.2 84.5 Heating capacity Max. 156.5 163.5 169.5 175.5 Outdoor static 0-110 0-110 0-110 0-110 pressure 380-415V 3N~ 380-415V 3N~ 380-415V 3N~ 380-415V 3N~...
  • Page 11 Gree GMV6 HR DC Inverter VRF Units Service Manual GMV-VQ1630WM/C- GMV-VQ1680WM/C- GMV-VQ1734WM/C- GMV-VQ1790WM/C- Model Net weight 325+385+385 325+385+385 385+385+385 385+385+385 Gross weight 340+400+400 340+400+400 400+400+400 400+400+400 GMV-VQ1845WM/C- GMV-VQ1905WM/C- GMV-VQ1959WM/C- GMV-VQ2015WM/C- Model 22+22+22 10+16+20+22 10+18+20+22 10+20+20+22 GMV-VQ280WM/C-X GMV-VQ280WM/C-X GMV-VQ280WM/C-X GMV-VQ615WM/C-X Combination...
  • Page 12 Gree GMV6 HR DC Inverter VRF Units Service Manual GMV-VQ2070WM/C- GMV-VQ2125WM/C- GMV-VQ2180WM/C- GMV-VQ2245WM/C- Model 380-415V 3N~ 380-415V 3N~ 380-415V 3N~ 380-415V 3N~ Power Supply 50/60Hz 50/60Hz 50/60Hz 50/60Hz Rated power 13.15+26.85+27.41+27. 13.15+27.41+27.41+27. 13.50+27.41+27.41+27. 21.00+27.41+27.41+27. input Rated current 23.5+48+49+49 23.5+49+49+49 24.1+49+49+49 37.5+49+49+49...
  • Page 13 Gree GMV6 HR DC Inverter VRF Units Service Manual GMV-VQ2295WM/C- GMV-VQ2349WM/C- GMV-VQ2405WM/C- GMV-VQ2460WM/C- Model 1400×830×1855+ 1400×830×1855+ 1400×830×1855+ 1400×830×1855+ Packing 1400×830×1855+ 1400×830×1855+ 1400×830×1855+ 1400×830×1855+ dimensions 1400×830×1855+ 1400×830×1855+ 1400×830×1855+ 1400×830×1855+ (W × D × H) 1400×830×1855 1400×830×1855 1400×830×1855 1400×830×1855 Net weight 325+385+385+385...
  • Page 14 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.3 Parameters of Hydro Box Model NRQR16L/A-T NRQR30L/A-T Hot water heating capacity 4.5(3.6~16) 4.5(3.6~30) Max setting temperature of domestic hot °C 55(35~55) 55(35~55) water Floor heating capacity Max setting temperature of floor heating °C...

  • Page 15: The Range Of Production Working Temperature

    Gree GMV6 HR DC Inverter VRF Units Service Manual The Range of Production Working Temperature — Cooling Heating Heating recovery Water heating Floor heating Ambient temperature -10°C ~55°C DB -25°C ~24°C DB -10°C ~24°C DB -20°C ~35°C DB -20°C ~24°C DB Indoor temperature 14°C ~25°C WB...

  • Page 16: Chapter 2 Commissioning

    Gree GMV6 HR 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 17: Unit Commissioning

    Gree GMV6 HR DC Inverter VRF Units Service Manual 3 Unit Commissioning 3.1 Preparation 3.1.1 Tools Name Picture Screwdrivers Spanner Hex key Pincers Vacuum pump Electronic balance Pressure gauge Multimeter...
  • Page 18 Gree GMV6 HR 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 19 Gree GMV6 HR 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 (m): (kW): (kW):...
  • Page 20 Gree GMV6 HR DC Inverter VRF Units Service Manual 3.1.3 Checking NOTE! Items not complying with installation specifications need to be recorded in time as analysis basis for the test of the refrigerating system. Checklist before commissioning Checklist Before GMV6 HR Commissioning...
  • Page 21 Gree GMV6 HR DC Inverter VRF Units Service Manual Checklist Before GMV6 HR Commissioning Category Item Reference Value Qualified Inspector ≤15 m. When the length Is the distance between an indoor unit and the nearest branch joint exceeds 10 m, the diameter...
  • Page 22 Gree GMV6 HR DC Inverter VRF Units Service Manual Checklist Before GMV6 HR Commissioning Category Item Reference Value Qualified Inspector The power voltage, phase sequence, and frequency Do the power voltage, phase are consistent with those on sequence, and frequency meet the...
  • Page 23 Gree GMV6 HR DC Inverter VRF Units Service Manual Checklist Before GMV6 HR Commissioning Category Item Reference Value Qualified Inspector If the circulating water circuit has been installed with C/D valve — (electric ball valve) as required? If the circulating water pump is...
  • Page 24 Gree GMV6 HR DC Inverter VRF Units Service Manual (5) After operating for 15~20min, if the water flow discharged by exhaust valve of hydro box outlet pipe is stable and there is no airflow, it means exhausting is done. In this case, you can close the manual exhaust valve and stop the operation of hydro box.
  • Page 25 Gree GMV6 HR DC Inverter VRF Units Service Manual 3.2.2 Commissioning operation of refrigerant system 3.2.2.1 Precautions (1) Do set one (only one) module as the main module during debugging. (2) When there is no special requirement, the other functions do not need to be set, and it can be operated according to the factory settings.
  • Page 26 Gree GMV6 HR DC Inverter VRF Units Service Manual (12) Button description: Short press: press the button for 3s and then release it; Hold the button for 5s: press the button for 5-10s and then release it; Hold the button for 10s: press the button for 10s and then release it.
  • Page 27 Gree GMV6 HR DC Inverter VRF Units Service Manual 3.2.2.2.3 Display instruction for each stage progress at the time of debugging Instruction for each stage progress at the time of debugging Deubugging — Progress code Status code code LED1 LED2...
  • Page 28 Gree GMV6 HR DC Inverter VRF Units Service Manual Instruction for each stage progress at the time of debugging Deubugging — Progress code Status code code LED1 LED2 LED3 Meaning Progress Display Display Display Code Code Code status status status Preheat time for compressor is insufficient.
  • Page 29 Gree GMV6 HR DC Inverter VRF Units Service Manual SW1 up button and SW4 back button are pressed for over 5 seconds, the system enters non-wired-controller commissioning mode, and no longer detects the communication status between the wired controller and indoor units.
  • Page 30 Gree GMV6 HR DC Inverter VRF Units Service Manual — Debugging code Progress code Status code LED1 LED2 LED3 Progress Display Display Display Code Code Code status status status 03_ module quantity Module Flash confirmation quantity After 30s of display, the automatic display is as follows; if press SW3 button within 30s, the display is as follows.
  • Page 31 Gree GMV6 HR DC Inverter VRF Units Service Manual — Debugging code Progress code Status code LED1 LED2 LED3 Meaning Progress Display Display Display Code Code Code status status status The system has detected “communication malfunction between main control and inverter compressor driver”.
  • Page 32 Gree GMV6 HR DC Inverter VRF Units Service Manual If an abnormality is detected, it will stay in the current state and manual troubleshooting is required. The corresponding faults are as below: — Debugging code Progress code Status code LED1...
  • Page 33 Gree GMV6 HR DC Inverter VRF Units Service Manual — Debugging code Progress code Status code LED1 LED2 LED3 Meaning Progress Display Display Display Code Code Code status status status The refrigerant in the system is 09_refrigerant insufficient. Please charge...
  • Page 34 Step 1: Install the commissioning software. Install the commissioning software on a PC, and connect the monitoring communication cable. (For details, see Gree Debugger.) Step 2: Cover all the front panels of the outdoor unit. Step 3: Set the master module.
  • Page 35 Gree GMV6 HR DC Inverter VRF Units Service Manual Master unit setting (SA8): Master and Slave DIP Switch (Two Digits) Unit Setting Position Master unit Slave unit Step 4: Power on the indoor and outdoor units. Power on all indoor and outdoor units. In this case, all modules of the outdoor unit indicate that the unit is in "Not commissioning"...
  • Page 36 Gree GMV6 HR DC Inverter VRF Units Service Manual LED1 LED2 LED3 Function code Display status Current process Display status Current status Display status Blinks Blinks Blinks Blinks Blinks Blinks Blinks Blinks Blinks Blinks After selecting the corresponding basic module, press the SW3 confirm button. The module displays as follows.
  • Page 37 Gree GMV6 HR DC Inverter VRF Units Service Manual Step 7: Click "Start" to enter the commissioning function Click "Start" to enter the commissioning function and the software automatically performs commissioning. " " indicates that commissioning is being performed on the phase and "...
  • Page 38 Gree GMV6 HR DC Inverter VRF Units Service Manual For the phase with "OK" displayed, a manual confirmation is required for entering the next commissioning step. In processes "3 Confirm number of outdoor basic modules" and "4 Confirm the number of IDUs", if the number of online units is consistent with the actual number, click Confirm or wait for 30 seconds to go to the next process.
  • Page 39 Gree GMV6 HR DC Inverter VRF Units Service Manual " " indicates that commissioning is not passed on the 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).
  • Page 40 Gree GMV6 HR DC Inverter VRF Units Service Manual During commissioning, click "Stop" to stop commissioning and then click "Start" to continue commissioning till commissioning ends. "Back" and "Skip" are provided in "10 ODU valves check before startup". When an exception occurs in step 10, click "Back" to return to step 9 and then click "OK" in step 9 to perform commissioning again for step 10.
  • Page 41 Gree GMV6 HR DC Inverter VRF Units Service Manual In step "13 Refrigerant charging running" is divided into trial running in manual charging cooling mode or manual charging heating mode. The system automatically determines and enables indoor unit cooling or forcibly enables indoor unit heating. 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.
  • Page 42 Gree GMV6 HR DC Inverter VRF Units Service Manual Note: During commissioning, users must listen to the operating sound of outdoor and indoor fans and compressors to check for exceptions. 3.2.2.5 Unit Commissioning by Using Multi-functional Debugger Step 1: Connect multi-functional debugger. For details, see the user manual of multi-functional debugger.
  • Page 43 Gree GMV6 HR DC Inverter VRF Units Service Manual Step 5: During commissioning, multi-functional debugger shows the current process (step). In steps 3, 4, 8, and 12, click Confirm to go to the next step. In step 10, click Skip or Back. In steps 3, 4, 5, 6, and 7, you can view the details.
  • Page 44 Gree GMV6 HR DC Inverter VRF Units Service Manual 3.2.2.7 Reference Values of Unit Normal Operation Parameters (Commissioning Check) Reference Values of Commissioning Parameters of the DC Inverter VRF Air-conditioning Unit Parameter Commissioning Item Unit Reference Value Remarks Name Outdoor ambient °C...
  • Page 45 Gree GMV6 HR DC Inverter VRF Units Service Manual Reference Values of Commissioning Parameters of the DC Inverter VRF Air-conditioning Unit Parameter Commissioning Item Unit Reference Value Remarks Name adjusted between 0PLS and 3000PLS. IPM module ●The IPM module temperature is lower...

  • Page 46: Unit Function Settings

    Gree GMV6 HR DC Inverter VRF Units Service Manual 4 Unit Function Settings 4.1 Outdoor Unit 4.1.1 DIP Switch Settings Master/ Capacity DIP switch Centralized controller Slave unit Code Name Meaning Default Setting Remarks Capacity DIP Defines the rated Depending on...
  • Page 47 Gree GMV6 HR DC Inverter VRF Units Service Manual refrigerating systems as follows: Address No. DIP1 DIP2 DIP3 DIP4 DIP5 × × × × × × × × × × × × × × × Note: ① DIP switch at the ON end indicates 0;...
  • Page 48 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.1.4 DIP Switch Examples (1) DIP switch position description DIP switch at the ON end indicates 0; DIP switch at the other end indicates 1. The white lever is DIP switch position.
  • Page 49 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.2.2 Function Description Default Setting Function Function Name Description Remarks Code Code Meaning This function is automatically started during maintenance. Based Refrigerant on the system pressure change, This function can —...
  • Page 50 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.2.3 Function Operations Before setting every function, perform the following steps to select the function you want to set. The following premise steps will not be repeated. Premise steps for function setting: Step 1: Open the commissioning window on the main board of the master unit.
  • Page 51 Gree GMV6 HR DC Inverter VRF Units Service Manual LED1 LED2 LED3 Function Name Function Display Current Display Current Display code status process status status status Blinks Blinks Outdoor unit silence Cooling/heating of the entire Blinks Blinks system Blinks Blinks...
  • Page 52 Gree GMV6 HR DC Inverter VRF Units Service Manual pipeline refrigerant recycle. Refrigerant Recycle Refrigerant Recycle Mode Name Remarks Mode Code This mode is selected when an indoor unit is faulty, Indoor unit pipeline refrigerant and the refrigerant in the indoor unit pipeline needs recycle to be recycled to the outdoor unit.
  • Page 53 Gree GMV6 HR DC Inverter VRF Units Service Manual Basic module refrigerant recycle: Step 3: Set the basic module that needs refrigerant recycle to emergency status, close the liquid pipe stop valve of the module in emergency status, and then select 02 in step 2 to enter refrigerant...
  • Page 54 Gree GMV6 HR DC Inverter VRF Units Service Manual LED1 LED2 LED3 Current Function code Display status Display status Current status Display status process/mode Blinks Blinks Blinks Blinks Blinks Blinks Blinks Blinks Step 3: After selecting the mode, press the SW3 confirm button. The master module displays as...
  • Page 55 Gree GMV6 HR DC Inverter VRF Units Service Manual Mode 10 Low noise Mode 11 Medium-low noise Mode 12 Ultra low noise 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 56 Gree GMV6 HR DC Inverter VRF Units Service Manual function setting status. The default status is 00, that is, no silence. 4.1.2.3.4 A8 After-Sales Vacuum Pumping Mode Introduction: This function is used to ensure the vacuum of the entire system during maintenance and to avoid dead pipeline zones.
  • Page 57 Gree GMV6 HR DC Inverter VRF Units Service Manual LED1 LED2 LED3 Current Function code Display status Display status Current status Display status process/mode Blinks Blinks Blinks Blinks Step 3: After selecting the mode, press the SW3 confirm button. The master unit displays as...
  • Page 58 Gree GMV6 HR DC Inverter VRF Units Service Manual Code Maximum Output Capability 100% (default setting) Note: After the capability limit is set, the cooling or heating effect is correspondingly reduced. Setting steps: Step 1: Enter n4 maximum output capability limit setting, and ensure that the master unit displays...
  • Page 59 Gree GMV6 HR DC Inverter VRF Units Service Manual LED1 LED2 LED3 Current Function code Display status Display status Current status Display status process/mode Blinks Blinks Step 2: Press the SW3 confirm button to send the engineering number offset instruction. The...
  • Page 60 Gree GMV6 HR DC Inverter VRF Units Service Manual LED1 LED2 LED3 Function code Display status Mode Display status Current status Display status Blinks Blinks Blinks After selecting the corresponding static pressure mode for the outdoor unit, press the SW3 confirm button.
  • Page 61 Gree GMV6 HR DC Inverter VRF Units Service Manual the one-button drainage status is set to on (one-button drainage is enabled), the one-button drainage code is automatically recovered to OF after 60 minutes. 4.1.2.3.11 C8 Compressor Failure Emergency Operation This function is after-sales emergency setting when a compressor works abnormally. It shields the abnormal compressor in a short time to ensure the emergency operation of other compressors.
  • Page 62 Gree GMV6 HR DC Inverter VRF Units Service Manual NOTES! ① A module can set only one compressor to emergency mode; ② The compressor emergency operation mode is valid only in single-module multi-compressor system; ③ The default status is 00.
  • Page 63 Gree GMV6 HR DC Inverter VRF Units Service Manual If you do not press any button in 5 minutes, the system will automatically exit the current screen and the unit will resume displaying the current status. If a basic module sets compressor failure emergency operation, the status indicators and LEDs on the module indicate the corresponding status.
  • Page 64 Gree GMV6 HR DC Inverter VRF Units Service Manual LED1 LED2 LED3 Function code Display status Mode Display status Current status Display status Modules not shielded display as follows: LED1 LED2 LED3 Function code Display status Mode Display status Current status Display status Press the SW4 back button.
  • Page 65 Gree GMV6 HR DC Inverter VRF Units Service Manual displayed as follows: LED1 LED2 LED3 Function code Display status Current process Display status Current status Display status At this time, if there is no button operation on the main control machine for 5 minutes, it will exit automatically and the unit will resume the current state display.
  • Page 66 Gree GMV6 HR DC Inverter VRF Units Service Manual Press the SW1 up button and the SW2 down button to select the corresponding low pressure control mode. LED1 LED2 LED3 Description Function Display Current Display Current Display code status process...
  • Page 67 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.2.3.18 4q Forced Off of the Electric Heater of an Indoor Unit Setting steps: Enter the function setting. The master unit displays as follows by default, and other basic modules display normal working status:...
  • Page 68 Gree GMV6 HR DC Inverter VRF Units Service Manual After selecting the corresponding value, press the SW3 confirm button. The master module displays as follows: LED1 LED2 LED3 Function code Display status Mode Display status Current status Display status The master unit memorizes this setting and does not clear it even upon power failure and power-on again.
  • Page 69 Gree GMV6 HR DC Inverter VRF Units Service Manual On the master unit, press and hold the SW2 down button for over 5 seconds. The master unit displays the current function setting status, and other modules display based on their current status.
  • Page 70 Gree GMV6 HR DC Inverter VRF Units Service Manual Under voltage protection for the DC bus of Inverter outdoor fan over-current protection. inverter compressor driver Over voltage protection for DC bus of the inverter Current detection circuit fault of the inverter compressor driver.
  • Page 71 Gree GMV6 HR DC Inverter VRF Units Service Manual and display sequence are listed below. "Outdoor ambient temperature (master module)" is displayed by default. Press the SW1 up button and the SW2 down button to select the corresponding query parameter value.
  • Page 72 Gree GMV6 HR DC Inverter VRF Units Service Manual while nE, 00, and 28 indicate –28 degrees. If a parameter is invalid on the unit, value "00" is displayed. If there are two levels of menus on the master unit, you can press the SW4 back button to return to the previous level.
  • Page 73 Gree GMV6 HR DC Inverter VRF Units Service Manual LED2 displays the left two digits of the quantity, and LED3 displays the right two digits. For example, if the indoor unit quantity is 75, 0075 is displayed. If there are two levels of menus on the master unit, you can press the SW4 back button to return to the previous level.
  • Page 74 Gree GMV6 HR DC Inverter VRF Units Service Manual Example: A unit barcode is N1R0128150066. A controller barcode is N1M0128150067. The display sequence is as follows: LED1 LED2 LED3 Parameter code Display status Parameter code Display status Parameter code Display status...
  • Page 75 Gree GMV6 HR DC Inverter VRF Units Service Manual units, quantities of the indoor and outdoor units, and commissioning completion status. Restoration to default settings 2 (clearing all settings except the commissioning status) On the main board of the master unit, press and hold the SW2 down button and SW4 back button for over 10 seconds to clear all the system settings.
  • Page 76 “4” cannot be changed. Otherwise, the unit may occur temperature sensor malfunction or cannot operate. DIP sequence Meaning Ex-factory setting Not connected Connected Gree water tank Floor heating Solar power NULL 4.3.3 Wire Controller Function Settings (S2) Operation Notices： The power supply for all hydro box must be unified.
  • Page 77 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.3.3.1 LCD of Wired Controller Instruction for LCD of wired controller as follows: Name Instruction Time column Display date and time The proportion of available hot water for the current user is displayed according Available hot water to the state in the frame for available hot water;...
  • Page 78 Gree GMV6 HR DC Inverter VRF Units Service Manual Icon Name Instruction Standard floor It means the current mode is the standard floor heating mode heating Display when schedule function is enabled Schedule Memory status (when the unit is re-energized after power failure, the indoor unit will...
  • Page 79 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.3.3.2 Button Graphics Function instruction of buttons as follow： Button No. Button name Button function RETURN Return to the previous interface Set water temperature; Move the cursor; Down Set or view parameters Turn page;...
  • Page 80 Gree GMV6 HR DC Inverter VRF Units Service Manual Under ON/OFF status, the available function for floor heating is as follow: ON/OFF Function Automatic floor heating water temp. setting and rapid floor heating Clean Switch the function through “Up” or “Down” button, press “MENU/OK” button to start or shut down corresponding function, “...
  • Page 81 Gree GMV6 HR DC Inverter VRF Units Service Manual Select “ON/OFF” and press “MENU/OK” button to start or shut down high temperature sterilization function. Select “Water temp.” set for high-temp sterilization”, press “MENU/OK” button to enter the setting interface, press “Up” or “Down” button to adjust the sterilization temperature, press “MENU/OK” button to save setting and return to the previous page, or press “RETURN”...
  • Page 82 Gree GMV6 HR DC Inverter VRF Units Service Manual Select “Auto set level 1/2/3” and press “MENU/OK” button to set auto setting level for floor heating. The higher the auto setting level is, the higher water outlet temperature will be. The user can select proper auto setting level according to their own usage habits.
  • Page 83 Gree GMV6 HR DC Inverter VRF Units Service Manual In schedule 1 interface, switch item through “Up” or “Down” button, when choosing the first item, press “MENU/OK” button to start or shut down schedule 1; when choosing the other items, press “MENU/OK”...
  • Page 84 Gree GMV6 HR DC Inverter VRF Units Service Manual Switch items through “Up” or “Down” button and press “Left” or “Right” button to switch On/Off time or adjust the time, then press “MENU/OK” button to save setting and return to the previous page.
  • Page 85 Gree GMV6 HR DC Inverter VRF Units Service Manual button to switch them, the interface will display the parameters of corresponding hydro box, as shown below. (1)User parameters view list: Parameter Parameter name Instruction range Master(01) Wired controller address Display the wired controller address...
  • Page 86 Gree GMV6 HR DC Inverter VRF Units Service Manual Parameter Parameter Instruction name range （Cool&Heat） 、 Cool&Heat nC（Cool） 、nH Modes （Heat） 、 nF （Air supply） Capacity of 150~3500 Water Tank Error Log of five error log Hydro Box 00:Non-priority Prior...
  • Page 87 Gree GMV6 HR DC Inverter VRF Units Service Manual Parameter Parameter Instruction name range Comp3 Discharge -30~150°C Temp Comp4 Discharge -30~150°C Temp Comp5 Discharge -30~150°C Temp Comp6 Discharge -30~150°C Temp Comp3 Operation 0~120 Hz Freq Display integer ODU Heating with the actual...
  • Page 88 Gree GMV6 HR DC Inverter VRF Units Service Manual list”. Press “Up” or “Down” button to select parameter, press “MENU/OK” button to enter corresponding parameter setting interface, press “Up” or “Down” button to adjust parameter value and press “MENU/OK” button to complete setting.
  • Page 89 Gree GMV6 HR DC Inverter VRF Units Service Manual (2) Project parameters setting list： Default Parameter name Parameter range Note value When two wired controllers control a set of (several) hydro box(es) at the same time, the 01:Master wired address of the two wired controller shall be...
  • Page 90 Gree GMV6 HR DC Inverter VRF Units Service Manual Default Parameter name Parameter range Note value 00：Allowed Hot Water E-heater Setting for ODU Fault 01：Not allowed Automatic Heat 00：Allowed Recovery is Allowed or — 01：Not allowed Automatic Heat Recovery Water Temp.
  • Page 91 Gree GMV6 HR DC Inverter VRF Units Service Manual Default Parameter name Parameter range Note value 50：K1=50min Defrosting Cycle K1 40：K1=40min 60：K1=60min 00：Disable System Energy-Saving 01：Enable 00: No silent mode 01～09:Intelligent night silent mode1 to ODU Quiet This is reserved function 10～12：Forced silent...

  • Page 92: Chapter 3 Faults

    Gree GMV6 HR DC Inverter VRF Units Service Manual Chapter 3 Faults 1 Error Indication Error Error — Content Content Code Code Malfunction of IDU Protection of indoor fan Auxiliary heating protection Water-full protection Abnormal Power for wired controller Freeze prevention protection...
  • Page 93 Gree GMV6 HR DC Inverter VRF Units Service Manual Error Error — Content Content Code Code Malfunction of ODU High-pressure protection Discharge low-temperature protection Low-pressure protection High discharge temperature protection of Drive IPM low temperature protection compressor Main board of ODU is poor...
  • Page 94 Gree GMV6 HR DC Inverter VRF Units Service Manual Error Error — Content Content Code Code Over-current protection of inverter Drive IPM module protection of compressor compressor Malfunction of drive temperature sensor of Drive IPM high temperature protection of compressor...
  • Page 95 Gree GMV6 HR DC Inverter VRF Units Service Manual Error Error — Content Content Code Code Wrong setting of ODU’s capacity Preheat time of compressor is insufficient code/jumper cap Power phase sequence protection Refrigerant-lacking protection Wrong address for driving board of...

  • Page 96: Troubleshooting

    Gree GMV6 HR DC Inverter VRF Units Service Manual 2 Troubleshooting WARNING! When troubleshooting the modular units, make sure that all outdoor units are powered off and powered on at the same time. Avoid doing so to only some of the outdoor units.
  • Page 97 Gree GMV6 HR DC Inverter VRF Units Service Manual Possible causes: -- Troubleshooting: not required. 2.5 "A6" Cooling and Heating Function Settings State Fault display: main board of outdoor unit displays Fault diagnosis: This is a status code. It indicates that the system has entered cooling and heating function settings state.
  • Page 98 Gree GMV6 HR DC Inverter VRF Units Service Manual Possible causes: -- Troubleshooting: not required. 2.10 "AF" Fan State Fault display: main board of outdoor unit displays Fault diagnosis: This is a status code. It indicates that the system has entered the fan mode. In this case, all the indoor units operate only in fan mode.
  • Page 99 Gree GMV6 HR DC Inverter VRF Units Service Manual Fault diagnosis: This is a status code. It indicates that the unit is in emergency stop status through remote centralized control, and it cannot be started unless such state is disabled.
  • Page 100 Gree GMV6 HR DC Inverter VRF Units Service Manual "b1" Outdoo r A mb ient Temperature Sen sor Fault Whether th e i nter face terminal between the main boa rd and Remove the foreign temperature sensor gets loose or...
  • Page 101 Gree GMV6 HR DC Inverter VRF Units Service Manual "b2" Defrosting Temperature Sen sor 1 Fault Whether th e i nter face terminal between the main boa rd and Remove the foreign temperature sensor gets loose or matters and plug it tightly...
  • Page 102 Gree GMV6 HR DC Inverter VRF Units Service Manual "b3" Defrosting Temperature Sen sor 2 Fault Whether th e i nter face terminal between the main boa rd and Remove the foreign temperature sensor gets loose or matters and plug it tightly...
  • Page 103 Gree GMV6 HR DC Inverter VRF Units Service Manual "b4" Sub coo ler's Li quid Outlet Tempe ratu re Sensor Fault Whether th e i nter face Remove the foreign terminal between the main boa rd and matters and plug it tightly...
  • Page 104 Gree GMV6 HR DC Inverter VRF Units Service Manual "b5" Sub coo ler's G as Outlet Tempe ratu re Sensor Fault Whether th e i nter face terminal between the main boa rd and Remove the foreign temperature sensor gets loose or...
  • Page 105 Gree GMV6 HR DC Inverter VRF Units Service Manual "b6" Suction Te mp erature Sen sor 1 Fault Whether th e i nter face terminal between the main boa rd and Remove the foreign temperature sensor gets loose or matters and plug it tightly...
  • Page 106 Gree GMV6 HR DC Inverter VRF Units Service Manual "b7" Suction Te mp erature Sen sor 2 Fault Whether th e i nter face terminal between the main boa rd and Remove the foreign temperature sensor gets loose or matters and plug it tightly...
  • Page 107 Gree GMV6 HR DC Inverter VRF Units Service Manual "b8" Outdoo r Humidity Sen sor Fault Whether th e i nter face terminal between the main boa rd and Remove the foreign temperature sensor gets loose or matters and plug it tightly...
  • Page 108 Gree GMV6 HR DC Inverter VRF Units Service Manual "b9" Heat E xchang er's G as Outlet Tempe ratu re Sensor Fault Whether th e i nter face terminal between the main boa rd and Remove the foreign temperature sensor gets loose or...
  • Page 109 Gree GMV6 HR DC Inverter VRF Units Service Manual "bA" Oil Return Temperature Sen sor Fault Whether th e i nter face terminal between the main boa rd and Remove the foreign temperature sensor gets loose or matters and plug it tightly...
  • Page 110 Gree GMV6 HR DC Inverter VRF Units Service Manual “bd” subcooler air inlet temperature sensor error Check the terminal between main If it is loosened or there are board and temperature sensor to see if it is foreign objects, retighten it...
  • Page 111 Gree GMV6 HR DC Inverter VRF Units Service Manual Sample 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 30 seconds...
  • Page 112 Gree GMV6 HR DC Inverter VRF Units Service Manual "C0" Communication Fault Between Indoor and Outdoor Units and Between Indoor Unit and Wired Controller Whether the communication cables between the main control board of the Connect the communication outdoor unit and the indoor unit and between...
  • Page 113 Gree GMV6 HR DC Inverter VRF Units Service Manual ■ The main board operates improperly. Troubleshooting: "C2" Communication Fault Between the Primary Controller and Inverter Compressor Driver Whether the communication cables between the main board of outdoor Connect the communication...
  • Page 114 Gree GMV6 HR DC Inverter VRF Units Service Manual "C3" Communication Fault Between the Primary Controller and Inverter Fan Driver Whether the communication cables between the main board of outdoor Connect the communication unit and inverter fan drive board cables properly...
  • Page 115 Gree GMV6 HR DC Inverter VRF Units Service Manual "C4" Indoor Unit Loss Fault Whether all the indoor Power on the units units are energized? Whether the communication cables of disconnected indoor units Connect the communication (in this case the disconnected cables properly indoor units display "C0") are...
  • Page 116 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.35 "C6" Alarm on Inconsistent Number of Outdoor Units Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The unit detects the number of online outdoor modules in real time. When it detects that the number of current modules is inconsistent with the number of modules previously commissioned and memorized, the unit will report the fault and stop working.
  • Page 117 Gree GMV6 HR DC Inverter VRF Units Service Manual Fault diagnosis: If any fan is set to emergency operation mode, the main board displays the code during the operation, indicating that the unit's fan has entered emergency operation. Possible causes: -- Troubleshooting: not required.
  • Page 118 Gree GMV6 HR DC Inverter VRF Units Service Manual Re-engineer the unit to increase indoor unit capacity or decrease outdoor unit capacity. 2.41 "CC" No Master Units Fault Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit...
  • Page 119 Gree GMV6 HR DC Inverter VRF Units Service Manual Step 1: for the mode exchanger with several main boards, please check if error is reported for every main board, if no, please make sure at least one branch is connected with IDU under the main board of every mode exchanger;...
  • Page 120 Gree GMV6 HR DC Inverter VRF Units Service Manual If two or more master units' DIP switches (SA2) are detected to be master unit's DIP switches in the network (that is, SA2 DIP switch is "00000"), the fault of multiple master units is reported.
  • Page 121 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.45 "CP" Fault of Multiple Main Wired Controllers Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: Two or more wired controllers in an HBS network are main wired controllers.
  • Page 122 Gree GMV6 HR DC Inverter VRF Units Service Manual "Cb" IP A ddress Assignment O ver flow Is th e p roblem so lve d afte r the indoo r a nd outdoor units are power ed o ff a nd powered...
  • Page 123 Gree GMV6 HR DC Inverter VRF Units Service Manual If the communication cord of mode exchanger IDU and ODU is not correctly connected, it will report IDU and ODU network communication abnormality; if data tested in 5 consecutive seconds is back to normal, the error will be resumed.
  • Page 124 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.50 "d1" Poor Indoor Circuit Board Fault display: wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: Check whether the address chip and memory chip of the indoor unit's main board can be read properly.
  • Page 125 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.52 "d3" Ambient Temperature Sensor Fault Fault display: wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value.
  • Page 126 Gree GMV6 HR DC Inverter VRF Units Service Manual "d4" Inlet Pi pe Tempe ratu re Sen sor Fault Whether th e i nter face terminal between the main boa rd Remove the foreign and inl et pipe temperature sensor gets loose...
  • Page 127 Gree GMV6 HR DC Inverter VRF Units Service Manual "d6" Outlet P ipe Temperature Sen sor Fault Whether th e i nter face terminal between the main boa rd and outlet Remove the foreign pipe temperature sensor gets loose or...
  • Page 128 Gree GMV6 HR DC Inverter VRF Units Service Manual "d7" Humidity Sen sor Fault Whether th e i nter face terminal between the main boa rd Remove the foreign and hu mid ity sen sor gets lo ose or matters and plug it tightly...
  • Page 129 Gree GMV6 HR DC Inverter VRF Units Service Manual "d9" Jumper Ca p Fau lt Whether th e j ump er cap is proper ly Install the jumper ca p installed at the jump silk screen on the main boar d?
  • Page 130 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.60 "dH" Abnormal Circuit Board of Wired Controller Fault display: wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The wired controller's IIC communication is abnormal. Possible causes: ■...
  • Page 131 Gree GMV6 HR DC Inverter VRF Units Service Manual "dC" Abn ormal Setting s of DIP Switch for Ca pacity Whether th e DIP switch for capacity on th e main bo ard is dial ed Redial the DIP switch...
  • Page 132 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.63 "dE" Indoor CO2 Sensor Fault (Reserved) 2.64 “dF” Temperature sensor error Error display: hydro box wired controller will display Applicable mode: all hydro boxes Error judgment condition and method: Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge the range of AD value.
  • Page 133 Gree GMV6 HR DC Inverter VRF Units Service Manual “dJ” water return temperature sensor error Is the terminal between If it is loosened or there Mainboard and water return temperature are foreign objects, sensor loose or any foreign objects retighten it after treatment...
  • Page 134 Gree GMV6 HR DC Inverter VRF Units Service Manual 2) After the water pump has operating for 30min, report alarm if detecting that water inlet temperature of generator is higher than water outlet temperature in 10 consecutive minutes. Possible reasons: ■Poor contact between floor heating outlet water pipe temperature sensor and terminal in main board interface...
  • Page 135 Gree GMV6 HR DC Inverter VRF Units Service Manual “dd” solar energy temperature sensor error Is the terminal between If it is loosened or there are main board and solar energy water foreign objects, retighten it temperature sensor loose or any foreign...
  • Page 136 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.71 "E1" Protection in Case of Too High Pressure Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: When the high pressure sensor detects that the temperature at the high pressure is greater than 65°C or the high pressure switch is disconnected, it indicates that the high pressure is too high, and the...
  • Page 137 Gree GMV6 HR DC Inverter VRF Units Service Manual E1 System Overpressure Pro tection Whether the high pressure of the unit Whether th e h igh pressu re Replace th e main bo ard of (measured by the external switch operates p roperly?
  • Page 138 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.72 "E2" Protection in Case of Too Low Air Discharge Temperature of Compressor Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display...
  • Page 139 Gree GMV6 HR DC Inverter VRF Units Service Manual After confirming that the EXV coil is connected properly, power off the unit. Then power on to reset the unit and check the resetting action. If unable to reset the unit, replace the coil or the main board. If able to reset the unit normally, inspect other parts of the unit.
  • Page 140 Gree GMV6 HR DC Inverter VRF Units Service Manual "E3" System Low Pressure Protection Does the low A fault occurs in the low pressure (measured by the pressure sensor. pressure gauge) reach the Replace the pressure sensor protection value? Add the refrigerant by the...
  • Page 141 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.74 "E4" Protection in Case of Too High Air Discharge Temperature of Compressor Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display...
  • Page 142 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.75 “Ed” Low drive module temperature protection Error display: ODU main board, IDU wired controller and IDU receive light board will display Applicable model: GMV6 series Error judgment condition and method: Test module temperature through the internal sensor of IPM module, when the test value is below outdoor ambient temperature, the system will stop for protection.
  • Page 143 Gree GMV6 HR DC Inverter VRF Units Service Manual "F0" Poo r Main Bo ard of the Outdoor Unit Whether syste m clock exce ptio n Replace th e CPU is a lso gen erated (check by u sin g the...
  • Page 144 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.77 "F1" High-pressure Sensor Fault Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The sensor detection circuit samples the AD value of high pressure sensor and determines the range of AD value.
  • Page 145 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.78 "F3" Low Pressure Sensor Fault Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The sensor detection circuit samples the AD value of low pressure sensor and determines the range of AD value.
  • Page 146 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.79 "F5" Discharge Temperature Sensor Fault of Compressor 1 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value.
  • Page 147 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.80 "F6" Discharge Temperature Sensor Fault of Compressor 2 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value.
  • Page 148 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.81 "F7" Discharge Temperature Sensor Fault of Compressor 3 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value.
  • Page 149 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.82 "F8" Discharge Temperature Sensor Fault of Compressor 4 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value.
  • Page 150 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.83 "F9" Discharge Temperature Sensor Fault of Compressor 5 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value.
  • Page 151 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.84 "FA" Discharge Temperature Sensor Fault of Compressor 6 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value.
  • Page 152 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.85 "FH" Abnormal Current Sensor of Compressor 1 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The circuit detection circuit samples the AD value and determines the range of AD value. When the sampled AD value exceeds the limits for 3 consecutive seconds, the fault is generated.
  • Page 153 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.86 "FC" Abnormal Current Sensor of Compressor 2 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The circuit detection circuit samples the AD value and determines the range of AD value. When the sampled AD value exceeds the limits for 3 consecutive seconds, the fault is generated.
  • Page 154 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.87 "FL" Abnormal Current Sensor of Compressor 3 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The circuit detection circuit samples the AD value and determines the range of AD value. When the sampled AD value exceeds the limits for 3 consecutive seconds, the fault is generated.
  • Page 155 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.88 "FE" Abnormal Current Sensor of Compressor 4 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The circuit detection circuit samples the AD value and determines the range of AD value. When the sampled AD value exceeds the limits for 3 consecutive seconds, the fault is generated.
  • Page 156 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.89 "FF" Abnormal Current Sensor of Compressor 5 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The circuit detection circuit samples the AD value and determines the range of AD value. When the sampled AD value exceeds the limits for 3 consecutive seconds, the fault is generated.
  • Page 157 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.90 "FJ" Abnormal Current Sensor of Compressor 6 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The circuit detection circuit samples the AD value and determines the range of AD value. When the sampled AD value exceeds the limits for 3 consecutive seconds, the fault is generated.
  • Page 158 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.91 "FU" Shell Roof Temperature Sensor Fault of Compressor 1 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value.
  • Page 159 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.92 "Fb" Shell Roof Temperature Sensor Fault of Compressor 2 Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The temperature sensor detection circuit samples the AD value of temperature sensor and determines the range of AD value.
  • Page 160 Gree GMV6 HR DC Inverter VRF Units Service Manual ■Poor contact between temperature sensor and terminal in main board interface ■Temperature sensor is abnormal ■Detecting circuit is abnormal Troubleshooting: “Fd” mode exchan g e b o x outlet pipe temperature...
  • Page 161 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.95 "H0" Fan Drive Board Fault Fault display: wired controller of indoor unit displays Fault diagnosis: Check the fault code displayed on the wired controller of the indoor unit. If the wired controller displays HO, check the fault code displayed on the 2-digit digital LED of the main control board of the outdoor unit, based on which you are able to identify the specific fault of the fan drive board.
  • Page 162 Gree GMV6 HR DC Inverter VRF Units Service Manual unit displays H6); ■ Inverter fan over-current protection (2-digit digital LED of the main control board of the outdoor unit displays H5); ■ Communication fault of fan drive (2-digit digital LED of the main control board of the outdoor unit displays C3).
  • Page 163 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.98 "H3" Reset Protection for the Fan Drive Module Fault display: wired controller of indoor unit displays Fault diagnosis: If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is H3, it indicates the reset protection for the fan drive board.
  • Page 164 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.99 "H5" Inverter Fan Over-current Protection Fault display: main board of outdoor unit displays Fault diagnosis: If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is H5, it indicates the over-current protection for the inverter fan.
  • Page 165 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.100 "H6" IPM Module Protection for Fan Drive Fault display: main board of outdoor unit displays Fault diagnosis: If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is H6, it indicates the IPM module protection for the fan drive.
  • Page 166 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.101 "H7" Temperature Sensor Fault of Fan Drive Fault display: main board of outdoor unit displays Fault diagnosis: If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is H7, it indicates the temperature sensor fault for the fan drive.
  • Page 167 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.102 "H8" IPM Over Temperature Protection for Fan Drive Fault display: main board of outdoor unit displays Fault diagnosis: If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is H8, it indicates the IPM over temperature protection for the fan drive.
  • Page 168 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.103 "H9" Loss of Synchronization Protection for Inverter Fan Fault display: main board of outdoor unit displays Fault diagnosis: If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is H9, it indicates the loss of synchronization protection for the inverter fan.
  • Page 169 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.104 "HC" Current Detection Circuit Fault of Fan Drive Fault display: main board of outdoor unit displays Fault diagnosis: If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is HC, it indicates the current detection circuit fault of fan drive.
  • Page 170 Gree GMV6 HR DC Inverter VRF Units Service Manual "HH" Over Voltage Pro tection for the DC Bus of Fan Drive Whether th e i nput voltage of the unit Chang e the volta ge to exceeds 460V? 380V The fan dr ive boa rd is...
  • Page 171 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.107 "HJ" Inverter Fan Startup Failure Fault display: main board of outdoor unit displays Fault diagnosis: If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is HJ, it indicates the inverter fan startup failure.
  • Page 172 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.108 "J0" Protection for Other Modules Fault display: main board of outdoor unit displays while the indoor unit and receiver of indoor unit do not. Applicable models: GMV6, GMV5, GMV5S, TOPS, GMV water Series...
  • Page 173 Gree GMV6 HR DC Inverter VRF Units Service Manual "J1" Compressor 1 Over-current Protection Power on aga in the units based on th e capa city and nu mb er o f indoo r u nits enable d previou sly in the case o f...
  • Page 174 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.110 "J2" Compressor 2 Over-current Protection Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: When the operating current of the compressor detected by the current sensor or circuit exceeds the limit, the unit will stop working.
  • Page 175 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.111 "J3" Compressor 3 Over-current Protection Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: When the operating current of the compressor detected by the current sensor or circuit exceeds the limit, the unit will stop working.
  • Page 176 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.112 "J4" Compressor 4 Over-current Protection Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: When the operating current of the compressor detected by the current sensor or circuit exceeds the limit, the unit will stop working.
  • Page 177 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.113 "J5" Compressor 5 Over-current Protection Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: When the operating current of the compressor detected by the current sensor or circuit exceeds the limit, the unit will stop working.
  • Page 178 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.114 "J6" Compressor 6 Over-current Protection Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: When the operating current of the compressor detected by the current sensor or circuit exceeds the limit, the unit will stop working.
  • Page 179 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.115 "J7" Four-way Valve Air Backflow Protection Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: When the difference between the system high pressure and low pressure during operation detected by the pressure sensor is less than 0.1 MPa, the unit will stop running to ensure safe operation.
  • Page 180 Gree GMV6 HR DC Inverter VRF Units Service Manual "J7" Four-way Va lve Air Backflo w Protection Whether th e four-way valve Conne ct them prope rly and coil is connected to the ma in relia bly boa rd p roperl y?
  • Page 181 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.116 "J8" High Pressure Ratio Protection Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: When the ratio between the system high pressure and the low pressure during operation detected by the pressure sensor exceeds 8, the unit will stop running to ensure safe operation.
  • Page 182 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.117 "J9" Low Pressure Ratio Protection Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: When the ratio between the system high pressure and the low pressure during operation detected by the pressure sensor is smaller than 1.8, the unit will stop running to ensure safe operation.
  • Page 183 Gree GMV6 HR DC Inverter VRF Units Service Manual NOTES! ① If the enquired IDU is normal, no fault 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.
  • Page 184 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.119 "L1" Indoor Fan Protection Fault display: wired controller of indoor unit and receiver 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.
  • Page 185 Gree GMV6 HR DC Inverter VRF Units Service Manual "L1" Indoor Fan Protectio n Is th e type of motor o f th e faulty indo or u nit DC motor, AC mo tor or PG motor? For a DC motor or a PG mo tor, the low speed of mo tor would trigger pro tection.
  • Page 186 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.120 "L2" E-heater Protection (Reserved Code, Not Yet Applied) 2.121 "L3" Overflow Protection Fault display: wired controller of indoor unit and receiver of indoor unit display Applicable models: all indoor units...
  • Page 187 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.122 "L4" Supply Power Over-current Protection Fault display: wired controller of indoor unit and receiver of indoor unit display Applicable models: all indoor units Fault diagnosis: When the current supplied to the wired controller by the indoor unit is too large, the fault is generated.
  • Page 188 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.123 "L5" Antifreeze Protection Fault display: wired controller of indoor unit and receiver of indoor unit display Applicable models: all indoor units Fault diagnosis: When the pipe temperature of the indoor unit is too low, the unit will trigger antifreeze protection to prevent the evaporator from freezing.
  • Page 189 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.124 "L6" Mode Conflict 2.125 "L7" No Master Indoor Unit Fault display: wired controller of indoor unit and receiver of indoor unit display Applicable models: all indoor units Fault diagnosis: The unit triggers the "no master indoor unit" fault when no master indoor unit exists in the system.
  • Page 190 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.126 "L9" Inconsistent Number of Indoor Units Under Integrated Control Fault display: wired controller of indoor unit and receiver of indoor unit display Applicable models: all indoor units Fault diagnosis: When more than 16 indoor units are connected to the wired controller or the number of indoor units connected to the wired controller is not the same as what is configured under integrated control, the fault is generated.
  • Page 191 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.128 "LH" Poor Air Quality Alarm (Reserved Code, Not Yet Applied) 2.129 "LC" Unmatched Models of Indoor and Outdoor Units Fault display: wired controller of indoor unit and receiver of indoor unit display...
  • Page 192 Gree GMV6 HR DC Inverter VRF Units Service Manual “LL” waterflow switch error Is the terminal between If it is loosened or there Mainboard and water flow switch loose are foreign objects, or any foreign objects inside? retighten it after treatment...
  • Page 193 Gree GMV6 HR DC Inverter VRF Units Service Manual Applicable model: wired controller connecting to several IDUs Error judgment condition and method: When the controller which controls multiple indoor units is connected to several indoor units, different indoor units are connected under different mode exchangers, or connected under different branches of the same mode exchanger.
  • Page 194 Gree GMV6 HR DC Inverter VRF Units Service Manual “Ln” lifting panel return air frame reset is abnormal Is the terminal between If it is loosened or there main board and limit switch loose or are foreign objects, any foreign objects inside?
  • Page 195 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.136 "n4" Settings Status of Maximum Output Capacity Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: This is a status code of a function. It indicates that the unit has entered settings status of maximum output capacity.
  • Page 196 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.140 "n9" Status of Querying Number of Online Indoor Units Fault display: main board of outdoor unit displays Fault diagnosis: The code is a query status code, in which case you can query the number of online indoor units.
  • Page 197 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.145 "nF" Fan Type Unit Fault display: main board of outdoor unit displays Fault diagnosis: The code indicates that the indoor unit only operates in fan mode. Possible causes: -- Troubleshooting: not required.
  • Page 198 Gree GMV6 HR DC Inverter VRF Units Service Manual “o3” IDU IPM module protection Check if the contact of U, V and W wire of indoor fan is good Check is the resistance among winding of each indoor fan phase equal? Is the insulation...
  • Page 199 Gree GMV6 HR DC Inverter VRF Units Service Manual “o7” IDU non-synchronism protection Check if the contact of U, V and W wire of indoor fan is good Check is the resistance among winding of each indoor fan phase equal? Is the insulation...
  • Page 200 Gree GMV6 HR DC Inverter VRF Units Service Manual “o8” drive communication error Check the terminal between If it is loosened or external drive board and main control there are foreign board to see if it is loose or any...
  • Page 201 Gree GMV6 HR DC Inverter VRF Units Service Manual “o9” IDU main control communication error Check the terminal between main If it is loosened or there board and external drive board to see if it is foreign objects, loose or any foreign objects inside? retighten it after treatment 否...
  • Page 202 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.151 "P1" Malfunctioning Compressor Drive Board Fault display: wired controller of indoor unit displays Fault diagnosis: If the fault code displayed on the wired controller of the indoor unit is P1, check the fault code displayed on the 2-digit digital LED of the main control board of the outdoor unit, based on which you are able to identify the specific fault of the compressor drive board.
  • Page 203 Gree GMV6 HR DC Inverter VRF Units Service Manual "P3" Reset Protection for the Compr essor Drive Module Is th e p roblem so lve d after the unit is powered off and powere d o n for mor e than three time s?
  • Page 204 Gree GMV6 HR DC Inverter VRF Units Service Manual "P5" Inve rte r Compressor Over-current Protection Whether th e U, V and W pha ses of compressor wire s are connected prope rly? Whether the resistance between the windings of each phase for the...
  • Page 205 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.155 "P6" IPM Module Protection for the Compressor Drive Fault display: main board of outdoor unit displays Fault diagnosis: If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is P6, it indicates the IPM module protection for the compressor drive.
  • Page 206 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.156 "P7" Abnormal Temperature Sensor of Compressor Drive Board Fault display: main board of outdoor unit displays Fault diagnosis: If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is P7, it indicates the abnormal temperature sensor of compressor drive board.
  • Page 207 Gree GMV6 HR DC Inverter VRF Units Service Manual "P8" IPM Over Temperature Pro tection for the Compressor Drive Boar d Check whether th e screws are Whether over-temperature tightened and whether the IPM protection of IPM modul e is trig gered...
  • Page 208 Gree GMV6 HR DC Inverter VRF Units Service Manual "P9" Loss of Synchroni zation Pro tection for the Inverte r Compressor Whether th e U, V and W pha ses of compressor wire s are connected prope rly? Whether th e U, V and W...
  • Page 209 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.159 "PC" Current Detection Circuit Fault of Compressor Drive Fault display: main board of outdoor unit displays Fault diagnosis: If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is PC, it indicates the current detection circuit fault of compressor drive.
  • Page 210 Gree GMV6 HR DC Inverter VRF Units Service Manual "PH" Over Voltage Pro tection for the DC Bus of Compre ssor Drive r Whether th e i nput voltage of the Chang e the volta ge to unit excee ds 460V?
  • Page 211 Gree GMV6 HR DC Inverter VRF Units Service Manual If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is PJ, it indicates the inverter compressor startup failure. Possible causes: ■ Poor contact of compressor's UVW cables;...
  • Page 212 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.163 "U0" Insufficient Warm-up Time for Compressor Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: When the oil preheating period of time before compressor starts is less than eight hours, the unit generates a fault.
  • Page 213 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.165 "U3" Power Phase-Sequence Protection Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: Check the three-phase power of the unit. If the power is connected incorrectly, thereby causing phase loss or reverse phase, the unit generates a fault.
  • Page 214 Gree GMV6 HR DC Inverter VRF Units Service Manual "U4" Refrigerant Loss Protection Whether the refrigerant is added in accordance with the design requirements? Check and troubleshoot the leaks of pipes 2.167 "U6" Abnormal Valve Prompt Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit...
  • Page 215 Gree GMV6 HR DC Inverter VRF Units Service Manual "U8" Abnormal Pipes of the Indoor Unit Power on the units based on the capacity and number of indoor units enabled previously in the case of protection state. After Replace the expansion valve coil...
  • Page 216 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.170 "UC" Master Indoor Unit Set Successfully Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit display Fault diagnosis: The code indicates the state of the unit rather than the fault. During the commissioning process, the unit prompts that the master indoor unit is already set successfully.
  • Page 217 Gree GMV6 HR DC Inverter VRF Units Service Manual Step 1: replace mode exchanger main board to see if the error is solved; Step 2: if UF error still exists after replacing mode exchanger main board, disconnect the communication connection of all IDUs and mode exchangers, connect the IDU communication cord one by one to the communication board of mode exchanger until all the IDUs which have triggered the UF error are tested;...
  • Page 218 Gree GMV6 HR DC Inverter VRF Units Service Manual Possible reasons: ■ Poor contact between IFD feedback side and main board interface terminal ■IFD abnormality ■Detecting circuit is abnormal Troubleshooting: ”yA” IFD error Check the terminal between main If it is loosened or there are...
  • Page 219 Gree GMV6 HR DC Inverter VRF Units Service Manual “y8” indoor air box sensor general error Check if the monitor software displays air box and the test data Check if the communication cord between main control board and air box...
  • Page 220 Gree GMV6 HR DC Inverter VRF Units Service Manual ■ The unit operates out of the range of required ambient temperature. ■ Airflow organization is set ineffectively. ■ The amount of refrigerant is insufficient. Troubleshooting: Ineffective Coolin g a nd...
  • Page 221 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.178 No Error Displayed But Compressor Not Starting in Cooling/Heating Mode Error display: no error displayed but compressor not starting in cooling / heating mode Applicable model: all ODUs Error judgment condition and method: Under shutdown status, the high pressure sensor has detected that the high pressure of the module is 55℃...

  • Page 222: Non-Fault Type Troubleshooting

    Gree GMV6 HR DC Inverter VRF Units Service Manual 3 Non-fault Type Troubleshooting 3.1 The Unit Does Not Start Problem Reason Solution No power Connect the air conditioning unit with a power Check whether the line voltage is within the...

  • Page 223: Chapter 4 Repair

    Gree GMV6 HR DC Inverter VRF Units Service Manual Chapter 4 Repair 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 224 Gree GMV6 HR DC Inverter VRF Units Service Manual 2.2 Refrigerant charging amount B of every module Refrigerant charging amount B of every module (kg) Module capacity (kW) ② IDU/ODU rated capacity Quantity of 22.4 28.0 33.5 40.0 45.0 50.4 56.0...

  • Page 225: Methods For Vacuum Pumping And Charging Refrigerant Of System

    Gree GMV6 HR DC Inverter VRF Units Service Manual 3 Methods for Vacuum Pumping and Charging Refrigerant of System 3.1 System vacuum pumping method Vacuum pumping method of heat recovery multi VRF unit include vacuum pumping operation for complete system and vacuum pumping operation for the system without outdoor unit.
  • Page 226 Gree GMV6 HR DC Inverter VRF Units Service Manual 5） Vacuumize it for 4 hours, and check if the vacuum degree reaches -0.1 MPa or above. If not, there may be a leak. It needs to conduct the leakage test once again. If there is no leak, vacuumize it for another 2 hours.
  • Page 227 Gree GMV6 HR DC Inverter VRF Units Service Manual 4）Use the outdoor unit simulation function of multi-functional debugger, operating steps are as below: ①In the power-on interface of multi-functional debugger, select “CAN Communication” and press “OK” button. ②Select “Project Setting” to enter engineering setting interface.
  • Page 228 Gree GMV6 HR DC Inverter VRF Units Service Manual ④Select “Enable”, and then start vacuum pumping. 4）Connect the regulating valve and the vacuum pump to the detection joints of the pipelines for connecting mode converter to outdoor unit side with charging pipe.
  • Page 229 Gree GMV6 HR DC Inverter VRF Units Service Manual 6） If the vacuum degree cannot be maintained by two times of vacuums, you can confirm that there is water inside the pipeline under the condition that there is no leakage. At this time, the water should be removed by vacuum destruction.
  • Page 230 Gree GMV6 HR DC Inverter VRF Units Service Manual 3.2 Refrigerant Charging Method Refrigerant charging for multi VRF unit includes two parts: pre-charging and start-up charging. 3.2.1 Pre-charging of refrigerant. Step 1: Connect the high pressure gauge pipe of pressure gauge 1 to the detection opening of the high pressure gas valve, the low pressure gauge pipe to the detection opening of the low pressure gas valve, and the medium gauge pipe to vacuum pump 1;...
  • Page 231 Gree GMV6 HR DC Inverter VRF Units Service Manual Step 5: Open the high pressure gauge valve (the low pressure gauge valve remains closed), charge the system with refrigerant, and record the weight change of the refrigerant tank. Step 6: When refrigerant tank is over and the refrigerant can’t be charged to the system any more, record the current weight of m2.
  • Page 232 Gree GMV6 HR DC Inverter VRF Units Service Manual Step 2: Fully open the liquid pipe valve and gas pipe valve of each module. Step 3: Make the complete unit enter into debugging operation by the debugging software or the main board of outdoor unit.

  • Page 233: Inspection Of Key Parts

    Gree GMV6 HR DC Inverter VRF Units Service Manual 4 Inspection of Key Parts 4.1 Outdoor Unit 4.1.1 Power Specifications Description The power supplies of the compressor and fan comprise the following three parts: Use of power to the main control board: ①...
  • Page 234 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description The power supplies of the compressor and fan comprise the following three parts: Use of power to the main control board: ① The specifications of the input power are 380-415V 3N~ 50/60Hz+ ①...
  • Page 235 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description The power supplies of the compressor and fan comprise the following three parts: Use of power to the main control board: ① The specifications of the input power are 380-415V 3N~ 50/60Hz+ ①...
  • Page 236 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description The power supplies of the compressor and fan comprise the following three parts: Use of power to the main control board: ① The specifications of the input power are 380-415V 3N~ 50/60Hz+ ①...
  • Page 237 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.1.1 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. (4) Check whether the fuses on the main board and filter board are damaged.
  • Page 238 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.2 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 239 Gree GMV6 HR DC Inverter VRF Units Service Manual 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 240 Gree GMV6 HR DC Inverter VRF Units Service Manual 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 241 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.2.1 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.
  • Page 242 Gree GMV6 HR DC Inverter VRF Units Service Manual 15K temperature sensor resistance - temperature curve Temperature Resistance \°C \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 1.594 1.363...
  • Page 243 Gree GMV6 HR DC Inverter VRF Units Service Manual 20K temperature sensor resistance - temperature curve Temperature Resistance \°C \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 2.94 2.495...
  • Page 244 Gree GMV6 HR DC Inverter VRF Units Service Manual 50K temperature sensor resistance - temperature curve Temperature Resistance \°C \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 10.178 8.5551...
  • Page 245 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.3 Solenoid Valve Specifications Description The coil is for providing the electromagnetic force for the The solenoid valve is used to control the on-and-off of the pipeline. The valve of the unit is solid closed. That is, action of magnet valve;...
  • Page 246 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description The coil is for providing the electromagnetic force for the The solenoid valve is used to control the on-and-off of the pipeline. The valve of the unit is solid closed. That is, action of magnet valve;...
  • Page 247 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description The coil is for providing the electromagnetic force for the The solenoid valve is used to control the on-and-off of the pipeline. The valve of the unit is solid closed. That is, action of magnet valve;...
  • Page 248 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.3.1 Mechanical Inspection (1) Confirm that the unit Power is disconnected. (2) Find the solenoid valve, check whether the fixing screw is loose and whether the valve and coil have any apparent exceptions.
  • Page 249 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.4 4-Way Valve Specifications Description The 4-way valve is used for switching cooling and heating operation, if the cooling 4-way valve is energized, it will The unit is with two 4-way valves, which adopts the coil conduct heating operation;...
  • Page 250 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description The 4-way valve is used for switching cooling and heating operation, if the cooling 4-way valve is energized, it will The unit is with two 4-way valves, which adopts the coil conduct heating operation;...
  • Page 251 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description The 4-way valve is used for switching cooling and heating operation, if the cooling 4-way valve is energized, it will The unit is with two 4-way valves, which adopts the coil conduct heating operation;...
  • Page 252 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.4.1 Mechanical Inspection Step 1: Confirm that the unit Power is disconnected. Step 2: Find the 4-way valve coil, check whether the fixing screw is loose and whether the valve and coil have any apparent exceptions.
  • Page 253 Gree GMV6 HR DC Inverter VRF Units Service Manual （4） If the measured resistance does not match with that in the following table, the coil needs to be replaced. Resistance (Ω) Coil Interface No. Normal range of deviation Main cooling 4-way...
  • Page 254 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.5 Electronic Expansion Valve Specifications Description Two types of electronic expansion valves are adopted by the unit: ① Heating electronic expansion valve with the largest openness of 3000 pls and 6-core coil.
  • Page 255 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description Two types of electronic expansion valves are adopted by the unit: ① Heating electronic expansion valve with the largest openness of 3000 pls and 6-core coil. The electronic expansion valve is used to control the flow. When the electronic ②...
  • Page 256 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description Two types of electronic expansion valves are adopted by the unit: ① Heating electronic expansion valve with the largest openness of 3000 pls and 6-core coil. The electronic expansion valve is used to control the flow. When the electronic ②...
  • Page 257 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.5.1 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 258 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.6 Fans Specifications Description The fans are powered by a DC inverter motor and can adjust the speed automatically The unit of 8HP-12HP is equipped with one fan, while the unit of 14HP-22HP is equipped with according to the environmental temperature and load, thus adapting to the demand of two fans.
  • Page 259 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ400WM/C-X、GMV-VQ450WM/C-X Circuit diagram Layout of electrical appliance box Physical position 1 Fan 1 2 Fan 2...
  • Page 260 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ504WM/C-X、GMV-VQ560WM/C-X、GMV-VQ615WM/C-X Circuit diagram Layout of electrical appliance box Physical position 1 Fan 1 2 Fan 2...
  • Page 261 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.6.1 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. Step 3: Rotate the blades with a hand to check whether they can rotate smoothly and whether the blades rub the baffle ring during rotation.
  • Page 262 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ224WM/C-X、GMV-VQ280WM/C-X、GMV-VQ335WM/C-X Circuit diagram Physical position...
  • Page 263 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ400WM/C-X、GMV-VQ450WM/C-X Circuit diagram Physical position...
  • Page 264 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ504WM/C-X、GMV-VQ560WM/C-X、GMV-VQ615WM/C-X Circuit diagram Physical position 1 Compressor 1 2 Compressor 2...
  • Page 265 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.7.1 Diagnosis of Compressor Failures 4.1.7.1.1 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 266 Gree GMV6 HR DC Inverter VRF Units Service Manual When the compressor frequency is 60 Hz, the current curve corresponding to the evaporation temperature and condensation temperature is shown as follows: Current curve Evaporation temperature °C When the compressor frequency is 90 Hz, the current curve corresponding to the evaporation...
  • Page 267 Gree GMV6 HR DC Inverter VRF Units Service Manual When the compressor frequency is 120 Hz, the current curve corresponding to the evaporation temperature and condensation temperature is shown as follows: Current curve Evaporation temperature °C NOTE! When the compressor is working at another frequency, the current curve can be obtained through interpolation calculation of the above frequency.
  • Page 268 Gree GMV6 HR DC Inverter VRF Units Service Manual Current Evaporation temperature °C When the compressor frequency is 90 Hz, the current curve corresponding to the evaporation temperature and condensation temperature is shown as follows: Current Evaporation temperature °C When the compressor frequency is 120 Hz, the current curve corresponding to the evaporation...
  • Page 269 Gree GMV6 HR DC Inverter VRF Units Service Manual NOTE! When the compressor is working at another frequency, the current curve can be obtained through interpolation calculation of the above frequency. Step 2: Check whether the running sound of the compressor is normal and whether any high-pitched sound or obvious scratch can be heard.
  • Page 270 Gree GMV6 HR DC Inverter VRF Units Service Manual Notes: ① Check whether the coil is firmly fixed. ② Touch the upper part of the electronic expansion valve and check whether the resetting of the unit can be clearly felt.
  • Page 271 Gree GMV6 HR DC Inverter VRF Units Service Manual D - Connecting to the exhaust side. Warning: high temperature! Marks are made on the 4-way valve: D indicates connection to the exhaust side, E indicates connection to the IDU evaporator, S indicates connection to the air inlet of gas-liquid separator, C indicates connection to the condenser;...
  • Page 272 Gree GMV6 HR DC Inverter VRF Units Service Manual Test the compressor drive board (IPM module). 1: Disconnect the power and wait five minutes, and unplug the compressor cable. 2: As shown in the figure, switch the multimeter to the diode gear. Point the black probe to the P bonding pad and the red probe to the L1 wiring terminal.
  • Page 273 Gree GMV6 HR DC Inverter VRF Units Service Manual normal condition, the multimeter will not beep. If it does, the drive board is damaged and needs to be replaced. 11: Point the black probe to the N1 bonding pad and the red probe to U wiring terminal. In the normal condition, the multimeter will not beep.
  • Page 274 Gree GMV6 HR DC Inverter VRF Units Service Manual 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 275 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.8 Compressor Drive Board The compressor drive board is used to control the operation of the compressor. Specifications Description The compressor drive board is used to control the operation of －...
  • Page 276 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ400WM/C-X、GMV-VQ450WM/C-X Circuit diagram Layout of electrical appliance box Physical position...
  • Page 277 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ504WM/C-X 、GMV-VQ560WM/C-X、GMV-VQ615WM/C-X Circuit diagram Layout of electrical appliance box Physical position...
  • Page 278 Gree GMV6 HR 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 L1, L2 and L3 power cables from the drive board.
  • Page 279 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.9 Fan Drive Board The fan drive board is used to control the operation of the fan(s). Specifications Description The compressor drive board is used to control the operation of －...
  • Page 280 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ400WM/C-X、GMV-VQ450WM/C-X Circuit diagram Layout of electrical appliance box Physical position...
  • Page 281 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ504WM/C-X 、GMV-VQ560WM/C-X、GMV-VQ615WM/C-X Circuit diagram Layout of electrical appliance box Physical position...
  • Page 282 Gree GMV6 HR 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 fans from the drive board. Do not operate without waiting two minutes after the unit is powered off.
  • Page 283 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ224WM/C-X、GMV-VQ280WM/C-X、GMV-VQ335WM/C-X Circuit diagram Layout of electrical appliance box Physical position...
  • Page 284 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ400WM/C-X、GMV-VQ450WM/C-X Circuit diagram Layout of electrical appliance box Physical position...
  • Page 285 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ504WM/C-X、GMV-VQ560WM/C-X、GMV-VQ615WM/C-X Circuit diagram Layout of electrical appliance box Physical position...
  • Page 286 Gree GMV6 HR 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 287 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.1.11 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 288 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ400WM/C-X、GMV-VQ450WM/C-X Circuit diagram Layout of electrical appliance box Physical position 1 High-pressure sensor SP2 2 Low-pressure sensor SP1...
  • Page 289 Gree GMV6 HR DC Inverter VRF Units Service Manual Models: GMV-VQ504WM/C-X、GMV-VQ560WM/C-X、GMV-VQ615WM/C-X Circuit diagram Layout of electrical appliance box Physical position 1 High-pressure sensor SP2 2 Low-pressure sensor SP1...
  • Page 290 Gree GMV6 HR 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 291 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.2 Mode Exchange Box 4.2.1 Power Specifications Description Use of power to the main control board: Specification of power source connected to mode switch is ①Providing 220V AC power for the solenoid valve coil and electronic expansion valve coil.
  • Page 292 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description Use of power to the main control board: Specification of power source connected to mode switch is ①Providing 220V AC power for the solenoid valve coil and electronic expansion valve coil.
  • Page 293 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description Use of power to the main control board: Specification of power source connected to mode switch is ①Providing 220V AC power for the solenoid valve coil and electronic expansion valve coil.
  • Page 294 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description Use of power to the main control board: Specification of power source connected to mode switch is ①Providing 220V AC power for the solenoid valve coil and electronic expansion valve coil.
  • Page 295 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.2.1.1 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. （4） Check whether the fuses on the main board are damaged.
  • Page 296 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.2.2 Temperature Sensors Specifications Description The type of temperature sensors of mode exchange box are The sensors are used to measure the temperature of the unit at different positions. 20K. Circuit diagram...
  • Page 297 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description The type of temperature sensors of mode exchange box are The sensors are used to measure the temperature of the unit at different positions. 20K. Circuit diagram Layout of electrical appliance box Physical position Models：NCHS2D...
  • Page 298 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description The type of temperature sensors of mode exchange box are The sensors are used to measure the temperature of the unit at different positions. 20K. Circuit diagram Layout of electrical appliance box Physical position ①Air outlet temperature sensor of subcooler...
  • Page 299 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description The type of temperature sensors of mode exchange box are The sensors are used to measure the temperature of the unit at different positions. 20K. Circuit diagram Layout of electrical appliance box Physical position Models：NCHS8D...
  • Page 300 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.2.2.1 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.
  • Page 301 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.2.3 Solenoid Valve Specifications Description All the magnet valves of the unit adopt the coil with unified The solenoid valve is used to control the on-and-off of the pipeline. The valve of the unit is specification.
  • Page 302 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description All the magnet valves of the unit adopt the coil with unified The solenoid valve is used to control the on-and-off of the pipeline. The valve of the unit is specification.
  • Page 303 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description All the magnet valves of the unit adopt the coil with unified The solenoid valve is used to control the on-and-off of the pipeline. The valve of the unit is specification.
  • Page 304 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description All the magnet valves of the unit adopt the coil with unified The solenoid valve is used to control the on-and-off of the pipeline. The valve of the unit is specification.
  • Page 305 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.2.3.1 Mechanical Inspection （1） Confirm that the unit Power is disconnected. （2） Find the solenoid valve coil, check whether the fixing screw is loose and whether the valve and coil have any apparent exceptions.
  • Page 306 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.2.4 Electronic Expansion Valve Specifications Description the largest openness of the electronic expansion valve of The electronic expansion valve is used to control the flow. When the electronic expansion subcooler and the electronic expansion balance valve for valve is closed (the openness is 0 pls), the flow is stopped.
  • Page 307 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description the largest openness of the electronic expansion valve of The electronic expansion valve is used to control the flow. When the electronic expansion subcooler and the electronic expansion balance valve for valve is closed (the openness is 0 pls), the flow is stopped.
  • Page 308 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description the largest openness of the electronic expansion valve of The electronic expansion valve is used to control the flow. When the electronic expansion subcooler and the electronic expansion balance valve for valve is closed (the openness is 0 pls), the flow is stopped.
  • Page 309 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description the largest openness of the electronic expansion valve of The electronic expansion valve is used to control the flow. When the electronic expansion subcooler and the electronic expansion balance valve for valve is closed (the openness is 0 pls), the flow is stopped.
  • Page 310 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.2.4.1 Mechanical Inspection Step 1: Switch off the power of the mode exchange box. Step 2: Check whether the coil of the electronic expansion valve is firmly fixed on the electronic expansion valve.
  • Page 311 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.2.5 Main Board Specifications Description ①NCHS1D, NCHS2D, NCHS4D models adopt one piece of main board; It is used for controlling the status of each load in the mode switch. ②NCHS8D adopts two pieces of same main boards.
  • Page 312 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description ①NCHS1D, NCHS2D, NCHS4D models adopt one piece of main board; It is used for controlling the status of each load in the mode switch. ②NCHS8D adopts two pieces of same main boards.
  • Page 313 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description ①NCHS1D, NCHS2D, NCHS4D models adopt one piece of main board; It is used for controlling the status of each load in the mode switch. ②NCHS8D adopts two pieces of same main boards.
  • Page 314 Gree GMV6 HR DC Inverter VRF Units Service Manual Specifications Description ①NCHS1D, NCHS2D, NCHS4D models adopt one piece of main board; It is used for controlling the status of each load in the mode switch. ②NCHS8D adopts two pieces of same main boards.
  • Page 315 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.3 Hydro Box 4.3.1 Power Specifications Description Use of power to the main control board: ①Providing DC power for the electronic expansion valve coil. — ②Generating the low-voltage DC power. Circuit diagram...
  • Page 316 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.3.1.1 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. （4） Check whether the fuses on the main board and expansion board are damaged.
  • Page 317 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.3.2 Temperature Sensors Specifications Description Two types of temperature sensors of different specifications are used, The sensors are used to measure the temperature of the unit at different positions. including 50K and 20K.
  • Page 318 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.3.2.1 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.
  • Page 319 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.3.3 Electronic Expansion Valve Specifications Description Electronic expansion valve of the hydro box with the largest openness The electronic expansion valve is used to control the flow. When the electronic expansion valve is closed (the of 2000 pls and 5-core coil.
  • Page 320 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.3.3.1 Mechanical inspection Step 1: Switch off the power of the hydro box. Step 2: Check if the threaded connection between the electronic expansion valve coil and the electronic expansion valve is normal.
  • Page 321 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.3.4 Water Flow switch Specifications Description — — Models: NRQR16L/A-T、NRQR30L/A-T Circuit diagram Layout of electrical appliance box Physical position...
  • Page 322 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.3.4.1 Mechanical inspection Step1: Disconnect the power supply switch of the hydro box; Step2: Check the water flow guiding direction in the top of water flow switch is vertical to the plate heat exchanger.
  • Page 323 Gree GMV6 HR DC Inverter VRF Units Service Manual 4.3.5 Main Board Models: NRQR16L/A-T、NRQR30L/A-T Circuit diagram Layout of electrical appliance box Physical position...
  • Page 324 Gree GMV6 HR DC Inverter VRF Units Service Manual Step 1: Dsconnect the power cable after power off the hydro box. 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 325: Replacement Of Key Unit Parts

    Gree GMV6 HR DC Inverter VRF Units Service Manual 5 Replacement of Key Unit Parts 5.1 Outdoor Unit 5.1.1 Preliminary Removing Procedure of the Main Body 5.1.1.1 Removing the Unit Panel 5.1.1.1.1 Removing the maintenance port panel (1) Press the window in the bulkhead cover to open the window.
  • Page 326 Gree GMV6 HR DC Inverter VRF Units Service Manual 5.1.1.1.2 Remove the unit cover plate (front), panel component (upper), panel (lower) (GMV-VQ224/280/335WM/C-X) （1） Use screwdriver to remove the screws shown in Fig. ①②③. （2） Remove the cover plate (front) ①, panel component (upper) ②, panel (lower) ③ of the unit.
  • Page 327 Gree GMV6 HR DC Inverter VRF Units Service Manual ④—right panel 3—screw 5.1.1.1.4 Remove the unit cover plate (front), panel component (double fans), left panel (lower) (GMV-VQ400/450/504/560/615WM/C-X) （1）Use screwdriver to remove the screws as shown in Fig. ⑤⑥⑦. （2）Remove the cover plate (front) ⑤, panel component (double fans) ⑥, left panel (lower) ⑦...
  • Page 328 Gree GMV6 HR DC Inverter VRF Units Service Manual 5.1.1.2 Remove the electric box cover 5.1.1.2.1 GMV-VQ224/280/335/400/450WM/C-X （1） Use screwdriver to remove the screw as shown in ⑧electric box cover. （2） Remove the electric box cover⑧. ⑧—electric box cover 3—screw 5.1.1.2.2 GMV-VQ504/560/615WM/C-X...
  • Page 329 Gree GMV6 HR DC Inverter VRF Units Service Manual ⑨—upper electric box cover ⑩—lower electric box cover 3—screw 5.1.2 Removing the ODU Main Board Preparations (1) Use the Power circuit breaker to switch off the Power of the GMV6 HR VRF system.
  • Page 330 Gree GMV6 HR DC Inverter VRF Units Service Manual Check whether the unit is the master or slave module Power off the unit and replace the main board DIP setting Checking communication status Setting of master unit engineering commissioning status...
  • Page 331 Gree GMV6 HR DC Inverter VRF Units Service Manual Display status of Display status of Display status of Display status of LED1 LED1 LED1 LED1 Master module Slave module Slave module Slave module status status status status (2) Powering off and replacing the main board ①...
  • Page 332 Gree GMV6 HR DC Inverter VRF Units Service Manual (4) Checking communication status After the setting of the main board DIP switches is completed and all the cables are connected, the ODU’s main control board is switched on. Check whether D3 and D4 indicators on the IDU sand ODU flash.
  • Page 333 Gree GMV6 HR DC Inverter VRF Units Service Manual 1 — buckle 2 — spring hook 5.1.4 Removing the Compressor Step 1: Preparations before replacing (1) Make sure that all the spare parts for replacement are in place. During the handling of the old and new compressors, do not place the compressor flat or place it upside down.
  • Page 334 Gree GMV6 HR DC Inverter VRF Units Service Manual The seal blocks of the compressor suction, exhaust and enthalpy nozzles must be intact. The electrical appliance box cover of the compressor must be intact. WARNING! Check whether the models of the new and old compressors on the nameplates are the same.
  • Page 335 Gree GMV6 HR DC Inverter VRF Units Service Manual WARNING! Make sure that the compressor's lubricant is sealed reliably. Hitachi compressors adopt the FVC68D dedicated lubricant, which is highly hygroscopic. Therefore, the lubricant has a strict requirement on lubricant sealing.
  • Page 336 Gree GMV6 HR DC Inverter VRF Units Service Manual Step 3: Remove panel and electric box cover （1） Operate according to Article 5.1.1. （2） After removing the electric box cover, disconnect the power cord of outdoor unit and seal with insulated tape.
  • Page 337 Gree GMV6 HR DC Inverter VRF Units Service Manual 1—upper cover plate 3 2—upper cover plate 4 3—side plate 3 4—screw （2） Remove the sound insulation cotton Step 5: Clean the electric components and pipe fixing block （1）When removing compressor wire, temperature sensor and electric heater, please make corresponding mark for re-wiring after replacement.
  • Page 338 Gree GMV6 HR DC Inverter VRF Units Service Manual Step 6: Discharging refrigerant The refrigerant in the system needs to be discharged from the high and low pressure sides of the system concurrently. If the refrigerant is discharged from one side only, the sealed scroll will hinder the refrigerant from being fully discharged.
  • Page 339 Gree GMV6 HR DC Inverter VRF Units Service Manual B. Applicable model: GMV-VQ504/560/615WM/C-X Warning! ①During welding, please make good protection. ②After unsoldering the welding point, separate the pipe nozzle and the compressor nozzle for ten seconds to prevent the two nozzles from sticking together.
  • Page 340 Gree GMV6 HR DC Inverter VRF Units Service Manual circuit of the unit are normal, only the compressor needs to be replaced. The procedure of checking oil quality is described as follows: ① After removing a compressor, shake the compressor on a solid ground in the sway angle of 30 to 45 degrees to ensure that the pollutants deposited on the bottom of the compressor can be poured out.
  • Page 341 Gree GMV6 HR DC Inverter VRF Units Service Manual After removing the compressor and oil, check the oil quality separately. If it is contaminated, replace the compressor, oil separator and gas-liquid separator. If the color of the oil turns black, check the other modules in the system using the same method.
  • Page 342 Gree GMV6 HR DC Inverter VRF Units Service Manual （3）Remove the fixing bolt, take away the gas-liquid separator. ①. Remove 4 fixing bolts (applicable to model GMV-VQ224/280/335WM/C-X). ②. Remove 3 fixing bolts (applicable to model GMV-VQ400/450/504/560/615WM/C-X). Warning! ①. Safety protection must be done during welding.
  • Page 343 Gree GMV6 HR DC Inverter VRF Units Service Manual Note: The outlet pipe of the gas liquid separator must be placed under the inlet pipe when the liquid in the gas liquid separator is being drained. No more than 20°...
  • Page 344 Gree GMV6 HR DC Inverter VRF Units Service Manual 3）Confirm the compressor oil return pipe. Remove the compressor oil return pipeline and check the impurities in the pipeline. CAUTION! Check the system components that need to be replaced, and ensure that pipe openings of the damaged components are sealed with tape or the like in time to ensure that they are in good condition for further analysis.
  • Page 345 Gree GMV6 HR DC Inverter VRF Units Service Manual amount of oil that is poured out of the system needs to be supplemented with additional oil after repair. Step 9: Removing pipeline system After checking the parts that need to be replaced, check whether there is any abnormality in the system pipeline.
  • Page 346 Gree GMV6 HR DC Inverter VRF Units Service Manual Step 10: Replacing compressors Pay attention to the following items when replacing the compressors: Remove the sealing rubber block before replacing the compressor and weld the compressor and the corresponding pipeline. Nitrogen is required during the welding process.
  • Page 347 Gree GMV6 HR DC Inverter VRF Units Service Manual installed at the same places of the respective old compressors and wired correctly. We recommend you replace the compressors one by one. CAUTION! The compressors must be wired in accordance with the wiring at the factory. The control varies by compressors.
  • Page 348 Gree GMV6 HR DC Inverter VRF Units Service Manual Step 13: System leakage inspection Check each welding joints. Firstly, observe whether the welding joints are smooth and whether there are obvious welding holes and other abnormal conditions. Then, charge the unit system with high-pressure nitrogen for leak inspection. If it is only for ODU maintenance, and it can be confirmed that there is no abnormality in the IDU system, only charge the ODU with high-pressure nitrogen for leak inspection.
  • Page 349 Gree GMV6 HR DC Inverter VRF Units Service Manual amount of lubricant poured out from removing components such as compressors and gas-liquid separator. If there is obvious abnormality, for example, when the amount of lubricant poured out is too little or too much, empty the lubricant in the system, and then check the section 3 basic parameters of the unit in Chapter 1 to determine the amount of lubricant that needs to be recharged.
  • Page 350 Compressor refrigeration oil plays an important role in the normal operation of compressor. The lubricant with the correct model number and quality must be used in accordance with the requirements of Gree after-sales and technical departments. The recharging amount must be correct.
  • Page 351 In each case, run the unit for more than 30 minutes, analyze the data, adjust the unit system and make sure that all parameters are correct. For specific parameters, contact after-sales engineers or Gree's technicians. 5.1.5 Removing and Installing Blades Preparations (1) Use the power circuit breaker to switch off the power of the GMV6 HR VRF system.
  • Page 352 Gree GMV6 HR DC Inverter VRF Units Service Manual ②. Remove the fixing screws ③. Remove the top cover sub-assy and 4 buchkes...
  • Page 353 Gree GMV6 HR DC Inverter VRF Units Service Manual B. Applicable to model GMV-VQ400/450/504/560/615WM/C-X. ①Remove the front and rear cover plate ②. Remove the fixing screws. a. Applicable to model GMV-VQ400/450WM/C-X. b. Applicable to model GMV-VQ504/560/615WM/C-X.
  • Page 354 Gree GMV6 HR DC Inverter VRF Units Service Manual c. Applicable to model GMV-VQ400/450/504/560/615WM/C-X. ③. Remove the top cover sub-assy and 4 buchkes Removing procedure (1) Use a wrench to remove the fastening nut, spring washer, and flat piece in sequence.
  • Page 355 Gree GMV6 HR DC Inverter VRF Units Service Manual 1 - nut; 2 - spring washer; 3 - flat piece; ⑦ - blade. 5.1.6 Removing and Installing Fan Preparations (1) Use the power circuit breaker to switch off the power of the GMV6 HR VRF system.
  • Page 356 Gree GMV6 HR DC Inverter VRF Units Service Manual 3 - bolt; ⑧ - blade. 5.1.7 Removing and Installing Condenser Preparations (1) Use the power circuit breaker to switch off the power of the GMV6 HR VRF system. (2) Make sure that the unit pipeline system is free of refrigerant.
  • Page 357 Gree GMV6 HR DC Inverter VRF Units Service Manual (2) Remove the electrical appliance box: Use a screwdriver to remove the screw that secures the electrical appliance box and remove the electrical appliance box 2. Notes: ①Before removing the electric box of GMV-VQ224/280/335/400/450WM/C-X model, please unsolder and pull out the two refrigerant pipes of radiator of electric box.
  • Page 358 Gree GMV6 HR DC Inverter VRF Units Service Manual (3) Remove the grille (back), the upper cross beams (two in front and rear), the right side panel, and the left side panel. (4) Use a screwdriver to remove the two screws that connect the condenser to the chassis.
  • Page 359 Gree GMV6 HR DC Inverter VRF Units Service Manual upper cover (rear) in sequence. (7) Make sure that the components and cables are properly connected. (8) After checking that there is no problem, buckle the front panel and tighten the scre.
  • Page 360 Gree GMV6 HR DC Inverter VRF Units Service Manual (2) Remove the pipe fixing blocks near the connection of the four-way valve and pipeline and the pressure vessel (gas-liquid separator, oil separator), condenser gas collection pipe, check valve (high and low pressure gas pipe, liquid pipe), and the fixing blocks and sheet metal brackets that fix other pipelines on four-way valves and pipelines.
  • Page 361 Gree GMV6 HR DC Inverter VRF Units Service Manual pressure. (3) Install the 4-way valve coil by referring to 5.1.8 Installing 4-way Valve Coil. (4) Install other components. (5) Fix the wires according to the original requirements. Refer to the unit wiring diagram.
  • Page 362 Gree GMV6 HR DC Inverter VRF Units Service Manual Note: When welding, do not get the other components burnt. (5) Install the electronic expansion valve coil to the correct position and turn it clockwise until a click is heard, indicating that it is in place.
  • Page 363 Gree GMV6 HR DC Inverter VRF Units Service Manual Installation procedure (1) Fix the plate heat exchanger and the screws of the bracket, and then fix the whole on the chassis. (2) Match the nozzles of the plate heat exchanger assembly with the nozzles of other matching pipelines, and weld the nozzles.
  • Page 364 Gree GMV6 HR DC Inverter VRF Units Service Manual 1 --- heat-shrinkable sleeve 2 --- high temperature wire tie 3 --- pressure sensor 4 --- pressing point Installation procedure (1) Find a new pressure sensor. First install the metal interface of the pressure sensor in the correct position, fix the fluorine nozzle with a wrench, and tighten it with another wrench.
  • Page 365 Gree GMV6 HR DC Inverter VRF Units Service Manual 1 --- high temperature wire tie 2 --- insulation cotton 3 --- temperature sensor sleeve 4 --- temperature sensor connector 5 --- temperature sensor Installation procedure (1) Connect the temperature sensor connector into the temperature sensor sleeve.
  • Page 366 Gree GMV6 HR DC Inverter VRF Units Service Manual 5.1.15 Preparation for Removing and Installing Solenoid Valve Steps: (1) Use the power circuit breaker to switch off the power of the GMV6 HR VRF system. (2) Make sure that the unit pipeline system is free of refrigerant.
  • Page 367 Gree GMV6 HR DC Inverter VRF Units Service Manual (2) Wrap the solenoid valve with a damp cloth. (3) Adopt nitrogen protection during welding. The nitrogen pressure is 0.5±0.1kgf/cm2 (relative pressure). (4) Install the new solenoid valve coil to the exact position.
  • Page 368 Gree GMV6 HR DC Inverter VRF Units Service Manual Installation steps （1）Install the new refrigerant adjustment tank to a correct position. （2）Weld the pipe nozzle. （3）Nitrogen protection should be adopted when welding, and the nitrogen pressure should be 0.5±0.1kgf/cm2 (relative pressure).
  • Page 369 Gree GMV6 HR DC Inverter VRF Units Service Manual ①-screw 2-electric box cover 5.2.1.3 Remove the mounting plate for electric components of unit (1) Before removing the mounting plate, cut off the power supply of unit, and unplug all the plugs of main board;...
  • Page 370 Gree GMV6 HR DC Inverter VRF Units Service Manual ①-screw 4-side plate sub-assy 2 5-side plate sub assy 1 6-side plate sub assy 5.2.2 Disassembly operation of main board of mode switch Preparation （1）Cut off the power supply. （2） Remove the electric box cover of unit, please refer to section 5.2.1.2 Remove the Electric Box Cover;...
  • Page 371 Gree GMV6 HR DC Inverter VRF Units Service Manual 5.2.3 Disassembly and assembly operation of magnet valve Preparation （1）Turn off the power supply of the unit system; （2）Ensure that there is no refrigerant in the piping system of the unit;...
  • Page 372 Gree GMV6 HR DC Inverter VRF Units Service Manual 1- screw 2- magnet valve coil 3- magnet valve Installation steps （1）Install the new magnet valve to a correct position; （2）Wrap the new valve body and surrounding magnet valves and important components with a wet cloth;...
  • Page 373 Gree GMV6 HR DC Inverter VRF Units Service Manual (4) Remove the side panel assembly without removing the mounting plate of electric component, side plate sub-assy 1, and side plate sub-assy 2. Please refer to section 5.2.1.4 Remove the Side Plate.
  • Page 374 (1) Use a screwdriver to unscrew the 9 screws of the top cover of the hydro box and the 4 screws at the bottom of the rear panel (the side panel without the GREE logo), and then remove the top cover and the rear panel.
  • Page 375 Gree GMV6 HR DC Inverter VRF Units Service Manual 5.3.2 Preliminary disassembly steps of unit body 5.3.2.1 Remove cover plate of unit (1) Use screwdriver to remove the screw① that fixes top cover; (2) Remove the top cover 1 from the unit.
  • Page 376 Gree GMV6 HR DC Inverter VRF Units Service Manual ①-screw 4-electric box cover 5.3.2.4 Remove the electric box (1)Before the removal, cut off the power supply of unit, and unplug all the plugs of main board; (2) Use screwdriver to remove the screw① that fixes electric box;...
  • Page 377 Gree GMV6 HR DC Inverter VRF Units Service Manual 5.3.2.5 Remove the side plate, water pipe joint, sealing plate (1) Use screwdriver to remove the screws① that fix side plate, water pipe joint, sealing plate; (2) Remove the left side plate 6 from the unit;...
  • Page 378 Gree GMV6 HR DC Inverter VRF Units Service Manual Installation procedure (1) Install according to the reverse order of disassembly. (2) For wiring of terminals please refer to the wiring diagram of unit. (3) Setting of dial code: Setting of the new main board should be the same as that of the former faulted main board, and the setting should be done under power-off status of unit;...
  • Page 379 Gree GMV6 HR DC Inverter VRF Units Service Manual 5.3.5 Disassembly and assembly operation of plate heat exchanger Preparation (1) Cut off the power supply of unit system. (2) Ensure that there is no refrigerant inside the pipeline system of unit.
  • Page 380 Gree GMV6 HR DC Inverter VRF Units Service Manual Removing procedure (1) Remove the connecting wires between the components and main board. (2) Remove the nut 1 that fixes the plate heat exchanger in the heat exchanger bracket. (3) Remove the plate heat exchanger sub-assy 2.
  • Page 381 Gree GMV6 HR DC Inverter VRF Units Service Manual (3) Check whether the components and connecting wires are well connected. (4) Install the side plate, electric box cover, panel top cover, tighten the screws, and weld the connection pipes for gas pipe and liquid pipe.

  • Page 382: Explosive View And Parts List

    Gree GMV6 HR DC Inverter VRF Units Service Manual 6 Explosive View and Parts List 6.1 Explosive View and Parts List of GMV-VQ224WM/C-X, GMV-VQ280WM/C-X and GMV-VQ335WM/C-X Vulnerable part Name Material code Rear Grill 016001060007 Coping 012049000050 Diversion Circle 200150060002 Axial fan blade...
  • Page 383 Gree GMV6 HR DC Inverter VRF Units Service Manual Vulnerable part Name Material code Electromagnetic Valve 43000072 Electromagnetic Valve 43044100144 Electromagnetic Valve 43044100224 Electronic Expansion Valve 43044100172 Gas Tube Filter 072190511 Plate-type Heat Exchanger 010007060008 Left Side Plate Sub-Assy 017037060016P...
  • Page 384 Gree GMV6 HR DC Inverter VRF Units Service Manual Vulnerable part Name Material code valve) Electric Heater(Compressor) 7651521244 Pressure Sensor 32218000008 Pressure Sensor 32218000009 Electronic Expansion Valve 43044100190 Bidirectional Strainer 07220016 Silencer 07245008 Compressor and Fittings 009001000190 Pressure Protect Switch...
  • Page 385 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.2 Explosive View and Parts List of GMV-VQ400WM/C-X, GMV-VQ450WM/C-X Name Material code Vulnerable part * Rear Grill 016001060013 Coping 012049000059P Diversion Circle 200150000011 Axial fan blade 10434100002 Brushless DC Motor 1570412406...
  • Page 386 Gree GMV6 HR DC Inverter VRF Units Service Manual Name Material code Vulnerable part * Electronic Expansion 43044100172 Valve Plate-type Heat 010007060007 Exchanger Left Side Plate 017037060016P Sub-Assy Chassis Sub-assy 017000060119P Liquid accumulator 07424100036 One way Valve 07130101 Oil Separator...
  • Page 387 Gree GMV6 HR DC Inverter VRF Units Service Manual Name Material code Vulnerable part * Expansion Valve) Electric 7651540714 Heater(Compressor) Pressure Sensor 32218000009 Pressure Sensor 32218000008 Sensor Sub-assy 390002060061 Right Side Plate 017038060026P Sub-Assy Electric Box Assy 100002065117 Terminal Board...
  • Page 388 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.3 Explosive View and Parts List of GMV-VQ504WM/C-X, GMV-VQ560WM/C-X and GMV-VQ615WM/C-X Name Material code Vulnerable part * Rear Grill 016001060013 Coping 012049000059P Diversion Circle 200150000011 Axial fan blade 10434100002 Brushless DC Motor...
  • Page 389 Gree GMV6 HR DC Inverter VRF Units Service Manual Name Material code Vulnerable part * Bidirectional Strainer 07220016 Oil Separator 035028060002 Silencer 07245008 Cut off Valve 0733410005301 Cut off Valve 0733410001401 Filter 07222025 Electronic Expansion Valve 072009060012 One way Valve...
  • Page 390 Gree GMV6 HR DC Inverter VRF Units Service Manual Name Material code Vulnerable part * Patching board 300027060098 Terminal Board 422000060004 Main Board 300027060136 Reactor 45000406000901 Filter Board 300020060006 Electric Box Assy 100002067747 Main Board 300027060076 Radiator 49018000088 Radiator 4901800008002...
  • Page 391 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.4 Explosive View and Parts List of NCHS1D Name Material code Vulnerable part * Upper cover plate 012148060250P Electronic Expansion Valve 072009000001 Filter 0741410000601 Electromagnetic Valve 43000072 Electronic Expansion Valve 43044100172...
  • Page 392 Gree GMV6 HR DC Inverter VRF Units Service Manual Name Material code Vulnerable part * Bottom case 012261060007P Side plate sub-assy 017110060029P Magnet Coil (Electronic Expansion 4304413252 Valve) UKV Magnet Coil (Electronic Expansion 4304413217 Valve) UKV Magnet Coil (electromagnetic valve)
  • Page 393 Gree GMV6 HR DC Inverter VRF Units Service Manual Name Material code Vulnerable part * Electronic Expansion 43044100172 Valve Electromagnetic Valve 43044100144 Electronic Expansion 072009000001 Valve Filter 0741410000601 Bottom case 012261060004 pothook 0211244601P Side plate sub-assy 2 017110060028P Electric Box Assy...
  • Page 394 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.6 Explosive View and Parts List of NCHS4D Name Material code Vulnerable part * 012020060117P Electric box cover 100002062901 Electric Box Assy 422000060004 Terminal Board 300023060022 Patching board 420001000019 Terminal Board...
  • Page 395 Gree GMV6 HR DC Inverter VRF Units Service Manual Name Material code Vulnerable part * Magnet Coil (Electronic Expansion 4304413251 Valve) UKV Magnet Coil (Electronic Expansion 4304413252 Valve) UKV Magnet Coil (Electronic Expansion 4304413234 Valve) UKV Magnet Coil (Electronic Expansion...
  • Page 396 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.7 Explosive View and Parts List of NCHS8D Name Material code Vulnerable part * Electric box cover 012020060509P Terminal Board 422000060004 Patching board 300023060022 Terminal Board 420001000019 Terminal Board 42011106 Electric Box Assy...
  • Page 397 Gree GMV6 HR DC Inverter VRF Units Service Manual Name Material code Vulnerable part * Upper cover plate 012148060214P Magnet Coil (Electronic Expansion Valve) 4304413251 Magnet Coil (Electronic Expansion Valve) 4304413252 Magnet Coil (Electronic Expansion Valve) 4304413234 Magnet Coil (Electronic Expansion Valve)
  • Page 398 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.8 Explosive View and Parts List of NRQR16L/A-T、NRQR30L/A-T Name Material code Vulnerable part * Panel 012073060278P Electric leakage circuit 4602800301 breaker Main Board 300002060336 300002060371 Main Board 422000060011 Terminal Board 42200006000401...
  • Page 399 Gree GMV6 HR DC Inverter VRF Units Service Manual Name Material code Vulnerable part * 012056060047P Right side plate 200149060003 Handle 012049060026P Top cover 390002060114 Sensor Sub-assy 39000283 Temperature sensor 3900028301 Temperature sensor 07333700052 Pressure maintaining valve 07108208 Automatic release valve...

  • Page 400: Chapter 5 Maintenance

    (1) Use a screwdriver to unscrew the 9 screws of the top cover of the hydro box and the 4 screws at the bottom of the rear panel (the side panel without the GREE logo), and then remove the top cover and...
  • Page 401 Gree GMV6 HR DC Inverter VRF Units Service Manual (2) Operate from the direction shown in the figure below. Loosen the drain valve and the exhaust valve installed on the outlet water pipe. (1) Meanwhile, open the drain valve for engineering installation.
  • Page 402 Gree GMV6 HR DC Inverter VRF Units Service Manual ④ Please ensure that the antifreeze is used in accordance with local laws and regulations. ⑤ Antifreeze may be toxic and it is strictly forbidden to mix with domestic water. ⑥ If this hydro box is only used for making hot water, the anti-freeze liquid should be added only...

  • Page 403: Appendixes

    Gree GMV6 HR 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) Temperature Resistance Temperature Resistance Voltage (V) Voltage (V) (kΩ)
  • Page 404 Gree GMV6 HR DC Inverter VRF Units Service Manual Temperature Resistance Temperature Resistance Voltage (V) Voltage (V) (kΩ) (kΩ) (°C) (°C) 20.54 1.393 0.779 3.137 19.63 1.429 0.758 3.141 18.75 1.467 0.737 3.145 17.93 1.503 0.717 3.15 17.14 1.54 0.697 3.153...
  • Page 405 Gree GMV6 HR DC Inverter VRF Units Service Manual Temperature Resistance Temperature Resistance Voltage (V) Voltage (V) (kΩ) (kΩ) (°C) (°C) 3.217 2.717 0.248 3.246 3.105 2.734 0.243 3.247 2.998 2.75 0.237 3.249 2.898 2.766 0.232 3.25 2.797 2.781 0.227 3.251...
  • Page 406 Gree GMV6 HR DC Inverter VRF Units Service Manual Temperature Resistance Temperature Resistance Voltage (V) Voltage (V) (kΩ) (kΩ) (°C) (°C) 59.08 0.835 1.427 3.08 56.19 0.866 1.386 3.086 53.46 0.898 1.346 3.092 50.87 0.931 1.307 3.098 48.42 0.965 1.269 3.103...
  • Page 407 Gree GMV6 HR DC Inverter VRF Units Service Manual Temperature Resistance Temperature Resistance Voltage (V) Voltage (V) (kΩ) (kΩ) (°C) (°C) 8.051 2.353 0.4289 3.231 7.745 2.379 0.4187 3.232 7.453 2.404 0.4088 3.234 7.173 2.429 0.3992 3.235 6.905 2.453 0.3899 3.237...
  • Page 408 Gree GMV6 HR DC Inverter VRF Units Service Manual Temperature Resistance Temperature Resistance Voltage (V) Voltage (V) (kΩ) (kΩ) (°C) (°C) 259.37 0.123 5.7457 2.096 245.61 0.129 5.5647 2.12 232.67 0.136 5.3903 2.144 220.5 0.143 5.2223 2.168 209.05 0.151 5.0605 2.191...
  • Page 409 Gree GMV6 HR DC Inverter VRF Units Service Manual Temperature Resistance Temperature Resistance Voltage (V) Voltage (V) (kΩ) (kΩ) (°C) (°C) 30.787 0.809 1.5996 2.845 29.544 0.835 1.5602 2.855 28.359 0.86 1.522 2.864 27.227 0.886 1.485 2.873 26.147 0.913 1.449 2.882...

  • Page 410: Appendix 2 Refrigerant Temperature And Pressure Table

    Gree GMV6 HR DC Inverter VRF Units Service Manual Appendix 2 Refrigerant Temperature and Pressure Table Refrigerant: R410A Corresponding Corresponding Corresponding Temperature Temperature Temperature saturation saturation saturation (°C) (°C) (°C) pressure (BAR) pressure (BAR) pressure (BAR) 1.54 5.96 16.4 1.61 6.16...

  • Page 411: Appendix 3 Pressure Sensor Voltage And Pressure Table

    Gree GMV6 HR DC Inverter VRF Units Service Manual Appendix 3 Pressure Sensor Voltage and Pressure Table High-pressure sensor features (R410A) Temperature Absolute pressure Temperature Absolute pressure Voltage (V) Voltage (V) (°C) (kPA) (°C) (kPA) 0.102 1300 0.111 1337 1.34 0.12...
  • Page 412 Gree GMV6 HR DC Inverter VRF Units Service Manual Temperature Absolute pressure Temperature Absolute pressure Voltage (V) Voltage (V) (°C) (kPA) (°C) (kPA) 0.828 3686 3.844 0.857 3767 3.93 0.887 3849 4.018 0.917 3932 4.106 0.947 4017 4.197 0.979 4103 4.288...
  • Page 413 Gree GMV6 HR DC Inverter VRF Units Service Manual Temperature Absolute pressure Temperature Absolute pressure Voltage (V) Voltage (V) (°C) (kPA) (°C) (kPA) 0.619 1228 2.753 0.633 1263 2.823 0.649 1300 2.897 0.665 1337 2.971 0.683 1375 3.047 0.701 1413 3.123...

  • Page 414: Appendix 4 Electric Specifications

    GMV-VQ504WM/C-X 50/60Hz 380-415V 3N~ 10.0 10.0×5 GMV-VQ560WM/C-X 50/60Hz 380-415V 3N~ 10.0 10.0×5 GMV-VQ615WM/C-X 50/60Hz 380-415V 3N~ 280+400 25+40 2.5+6.0 2.5×5+6.0×5 GMV-VQ680WM/C-X 50/60Hz 380-415V 3N~ 280+450 25+40 2.5+6.0 2.5×5+6.0×5 GMV-VQ730WM/C-X 50/60Hz 380-415V 3N~ 280+504 25+50 2.5+10.0 2.5×5+10.0×5 GMV-VQ784WM/C-X 50/60Hz 380-415V 3N~...
  • Page 415 Gree GMV6 HR DC Inverter VRF Units Service Manual Capacity of Minimum circuit breaker Recommended wire Combination cross-sectional Model Power supply of each (cross-sectional area) method area of grounding combination wire (mm module (A) GMV-VQ1175WM/C- 380-415V 3N~ 560+615 50+50 10.0+10.0 10.0×5+10.0×5...
  • Page 416 Gree GMV6 HR DC Inverter VRF Units Service Manual NOTES! ① Specification of circuit breaker and power cord is selected on the basis of unit’s maximum power (max. current). ② Specification of power cord is based on the working condition where ambient temperature is 40℃...

  • Page 417: Appendix 5 Circuit Diagram

    Gree GMV6 HR DC Inverter VRF Units Service Manual Appendix 5 Circuit Diagram GMV-VQ224WM/C-X、GMV-VQ280WM/C-X、GMV-VQ335WM/C-X...
  • Page 418 Gree GMV6 HR DC Inverter VRF Units Service Manual GMV-VQ400WM/C-X、GMV-VQ450WM/C-X...
  • Page 419 Gree GMV6 HR DC Inverter VRF Units Service Manual GMV-VQ504WM/C-X、GMV-VQ560WM/C-X、GMV-VQ615WM/C-X...
  • Page 420 Gree GMV6 HR DC Inverter VRF Units Service Manual NCHS1D...
  • Page 421 Gree GMV6 HR DC Inverter VRF Units Service Manual NCHS2D...
  • Page 422 Gree GMV6 HR DC Inverter VRF Units Service Manual NCHS4D...
  • Page 423 Gree GMV6 HR DC Inverter VRF Units Service Manual NCHS8D...
  • Page 424 Gree GMV6 HR DC Inverter VRF Units Service Manual NRQR16L/A-T、NRQR30L/A-T Note: Refer to the mark on the unit for the actual circuit diagram.

  • Page 425: Appendix 6 Refrigerant Flow For Each Operation Mode

    Gree GMV6 HR DC Inverter VRF Units Service Manual Appendix 6 Refrigerant Flow for Each Operation Mode 6.1 GMV-VQ224WM/C-X、GMV-VQ280WM/C-X、GMV-VQ335WM/C-X、 GMV-VQ400WM/C-X、GMV-VQ450WM/C-X 6.1.1 Cooling Operation...
  • Page 426 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.1.2 Heating Operation...
  • Page 427 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.1.3 Main body Cooling...
  • Page 428 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.1.4 Main body Heating...
  • Page 429 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.2 GMV-VQ504WM/C-X、GMV-VQ560WM/C-X、GMV-VQ615WM/C-X 6.2.1 Cooling Operation...
  • Page 430 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.2.2 Heating Operation...
  • Page 431 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.2.3 Main body Cooling...
  • Page 432 Gree GMV6 HR DC Inverter VRF Units Service Manual 6.2.4 Main body Heating...
  • Page 433 JF00304244...

This manual is also suitable for:

Gmv-vq730wm/c-xGmv-vq784wm/c-xGmv-vq840wm/c-xGmv-vq895wm/c-xGmv-vq950wm/c-xGmv-vq1015wm/c-x ... Show all

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