Gree GMV6 DC Inverter VRF Units Service Manual
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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.
Possible reasons:
■
Insufficient system refrigerant
■
Electronic expansion valve is abnormal
■
Drive board is damaged
Troubleshooting:
Step 1: confirm if the refrigerant charge is added according to the design requirement, or any leakage exists,
insufficient refrigerant might lead to protection;
Step 2: turn on the unit according to the IDU capacity and quantity in previous protection status, after confirming
the coil of IDU and ODU expansion valve is correctly connected, disconnect the power, then re-energize for reset
and check the reset action. If it is abnormal, replace the coil or main board; if it is normal, check other items;
Step 3: if no problems are found in other inspection steps, the drive board might be damaged, IPM temperature
test is abnormal, please replace the drive board.
2.76 "F0" Poor Main Board of Outdoor Unit
Fault display:
main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit
display
Fault diagnosis:
Check whether the address chip, memory chip and clock chip of the main board of the outdoor unit
can be read properly. If not, the fault is generated.
Possible causes:
■ Abnormal address chip;
■ Abnormal memory chip;
■ Abnormal
clock chip.
Troubleshooting:
Summary of Contents for GMV-1015WM/G-U
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