Gree GWH09RB-K3DNA2C Service Manual page 57

8.High temperature and overload protection (E8)(AP1 below means control board of outdoor unit)
Main detection points:
● If the outdoor ambient temperature is in normal range;
● If the indoor and outdoor fan are running normally;
● If the radiating environment of indoor and outdoor unit is good.
E8 is displayed
ambient temperature is higher
If the radiating of indoor
and outdoor unit is good?
If the indoor and outdoor
fan are running normally?
Replace outdoor
mainboard
54
If the outdoor
than 53℃?
N
N
Y
End
Normal protection, please
Y
use it after improving the
outdoor ambient temperature
N
Improve the radiating environment
Y
of unit (clean the heat exchanger
and remove surrounding obstacles)
N
Connect normally?
Y
Fan capacitor is broken?
N
Motor is broken?
N
Replace mainboard
Service Manual
Unit restarts
Y
normally
Y
Unit restarts
normally
Adjust the
Y
connection
Replace Fan
Y
capacitor
Y
Replace Motor
Installation and Maintenance