Gree GWH09ACC-K6DN A1 A/I Service Manual page 77

(3) High temperature and overload protection diagnosis (AP1 hereinafter refers to the control board of the outdoor unit)
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Is outdoor ambient temperature higher than 53?
74
Overheat and high
temperature protection
No
20 minutes after the complete
unit is powered off.
Is heat dissipation of the indoor unit
and outdoor unit abnormal?
No
Does the outdoor fan work normally?
Yes
Replace the
control panel AP1
End
Normal protection, please operate
Yes
it after the outdoor ambient temp-
erature is normalized.
Improve the heat
Yes
dissipation environ-
ment of the unit
1. Check if the fan terminal OFAN
is connected correctly
No
2. Resistance between any two
terminals is measure by an ohm
gauge and should be less than 1K
Ohm.
Replace the fan
capacitor C1
Replace the
outdoor fan
Service Manual
Installation and Maintenance