Gree GWH09ACC-S6DBA1A Service Manual page 61

3. 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
If the outdoor
ambient temperature is higher
than 53℃?
If the radiating of indoor
and outdoor unit is good?
If the indoor and outdoor
fan are running normally?
Replace outdoor
mainboard
58
Y
N
Y
N
Y
End
Normal protection, please
use it after improving the
outdoor ambient temperature
N
Improve the radiating environment
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
Unit restarts
Y
normally
Unit restarts
Y
normally
Adjust the
Y
connection
Replace Fan
Y
capacitor
Replace Motor
Y
Installation and Maintenance
Service Manual