Gree GMV6 DC Inverter VRF Units Service Manual
2.131 "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.
Possible causes:
■ The compressor drive board operates improperly.
Troubleshooting:
"P7" Abnormal
Temperature Sensor of
Compressor Drive Board
Is the problem solved after
the unit is powered off and powered on for
more than three times?
The compressor drive board
operates improperly
No
Replace the compressor drive
board
Yes
2.132 "P8" IPM Over Temperature Protection for Compressor Drive
Board
Fault display: main board of outdoor unit displays
Fault diagnosis:
If the fault code displayed on the 2-digit digital LED of the outdoor unit's main control board is P8, it
indicates the IPM over temperature protection for the compressor drive.
Possible causes:
■ The IPM module's screws are not tightened;
■ The IPM module is not covered, or unevenly covered by thermal grease, or covered by dried
thermal grease;
■ The compressor drive board operates improperly.
Troubleshooting:
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