Gree GWHD(18)NK3FO Service Manual page 35

2. PFC protection malfunction, capacity charging malfunction
Main checking points:
If the wiring of the induction is connected well and if the induction is broken;
If the mainboard is broken;
Flow chart:
Start
Check if power supply is normal
Power supply is abnormal?
no
Replace the outdoor
mainboard
End
Turn on the unit
yes
after power supply
resumes normal