Gree GWHD(18)NK3FO Service Manual page 45

9. Anti-high temperatureand overload malfunction
Main checking points:
If the outdoor ambient temperature is within the normal range;
If the indoor fan and outdoor fan are running normally;
If the indoor and outdoor radiation environment is good;
Flow chart:
If the outdoor ambient temperature
is above 53
If the indoor and outdoor radiation
is insufficient
If the outdoor fan is working normally
Replace outdoor
mainboard
Start
yes
no
yes
no
no
yes
End
It is a normal protection, please
operate the unit after the outdoor
ambient temperature has changed
Improve the radiation
environment of the unit
Check if the terminal of the fan is
connected well, if the fan is broken
Replace fan capacitor
Replace outdoor fan