Gree GWH18MC-K3DNA2G Service Manual page 59

(5) Malfunction of Overload Protection (E8)
Main check point:
Whether the tube temperature sensor is normal?
Whether the outdoor ambient temperature is within the normal range?
Whether indoor fan and outdoor fan can operate normally?
Whether radiation environment inside or outside the unit is good?
Check flow chart:
Check whether outdoor and indoor tube
temperature sensors are normal?
Whether outdoor ambient
temperature is more than 53
Whether radiation inside or
outdoor the unit is good?
Whether outdoor fan
operates normally?
Replace main board of
Remark:
When overload protection occurs under cooling mode, it's because the main board detected the outdoor tube temperature sensor
exceeds limited temperature and then the unit stops operation. Please check outdoor tube temperature sensor;
When overload protection occurs under heating mode, it's because the main board detected the indoor tube temperature sensor
exceeds limited temperature and then the unit stops operation. Please check indoor tube temperature sensor;
56
Start
Yes
o
C?
No
No
Yes
outdoor unit
End
Replace the tube temperature
No
sensor
Yes
Normal protection. Please
improve the ambient temperature
Yes
Improve the radiation
environment for the unit
Check whether the fan
No
terminal is connected well.
Whether the fan is damaged
Replace fan capacitor
(unavailable for DC fan)
Replace outdoor
fan
Service Manual
Installation and Maintenance