Gree UM600PH/A-M - “P9” Desynchronizing Protection for Inverter Compressor

GREE Duct type Ducted Type Split Air-Conditioner Units
108
Troubleshooting:
“P8” overheating
protection for driven IPM
of compressor
Check if the
overheating protection for driven
IPM of compressor occurs once the unit
is energized?
Driven board of compressor is
faulted
No
Replace the driven board of
compressor
Yes
Check if the screw are firmly
fixed, if the IPM module has been
applied with radiating pasted
No
(50) “P9” desynchronizing protection for inverter compressor
Error display:ODU mainboard displays .
Applicable model: all models.
Condition and method for fault judgement:View the error code displayed in dual-8 nixie tube of
main control board of ODU, if the nixie tube displays P9, it means desynchronizing protection for inverter
compressor.
Possible causes:
1) Driven board of compressor is faulted.
2) Compresor is damaged.