Gree GWHD(18)NK3FO Service Manual page 38

Desynchronizing happens
during operation
Outdoor unit is working?
yes
Unit radiation is good?
yes
Input voltage is normal?
yes
Refrigerant amount is too much?
no
Replace the outdoor
mainboard
Eliminate the malfunction
no
Replace the compressor
End
Check if fan
no
terminal is
connected well
Improve radiation
situation of the unit
no
(such as cleaning
the heat exchanger,
improve ventilation
Turn on the unit
no
after the power
supply voltage
resumes normal
Charge refrigerant
yes
according to the
service manual
yes
Replace the fan capacitor
Replace the outdoor unit