Gree GWH18MC-K3DNA2G Service Manual page 61

(7) Malfunction of PFC Protection (HC)
Main check point:
Whether power supply is normal?
Check flow chart:
Check whether power supply is
58
Start
normal
Is power abnormal?
No
Replace main board of
outdoor unit
End
Turn on the unit again
Yes
after the power is
resumed
Service Manual
Installation and Maintenance