Gree 4LIV30HP230V1A Service Manual page 62

9. Maintenance
Service Manual
3. High temperature and overload protection (E8)(AP1 below means control board of outdoor unit)
Main detection points:
(1) outdoor temperature (2) fan (3)air inlet and air outlet of indoor/outdoor unit
Malfunction diagnosis process:
Installation and Maintenance
Overload protection,
high temperature
prevention protection
Is the outdoor ambient temperature
higher than 53℃？
N
After the complete unit is disconnected
from the power for 20mins
Is the radiation of indoor unit
and outdoor unit is not good?
N
Check whether the outdoor
fan operates normally?
Y
Replace the control board
End
Normal protection. Please operate
it when the outdoor ambient
Y
temperature is improved.
Improve the unit's
Y
radiation environment.
Check whether the fan terminal
N
OFAN is connected well;
Measure any two terminal with
the ohmmeter and resistance is less
than 1000ohm.
Replace the fan capacitor C1
Replace the outdoor fan
59