Gree GMV6 DC Inverter VRF Units Service Manual
"P8" IPM Over Temperature
Protection for the
Compressor Drive Boar d
Whether over-temperature
protection of IPM module is triggered
upon powe r-on?
The compr essor drive board
operate s imprope rly
No
Replace th e compre ssor drive
board
Yes
Check whether the screws are
tightened and whether the IPM
module is coated with thermal
grease
No
2.133 "P9" Loss of Synchronization Protection for Inverter
Compressor
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 P9, it
indicates the loss of synchronization protection for the inverter compressor.
Possible causes:
■ The compressor drive board operates improperly.
■ The compressor is damaged.
Troubleshooting:
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