Gree Livo GEN3 LIVV30HP230V1A Service & Parts Manual page 56

(3)High temperature and overload protection diagnosis (AP1 hereinafter refers to the control board of the outdoor unit)
Mainly detect:
Is outdoor ambient temperature in normal range?
Are the outdoor and indoor fans operating normally?
Is the heat dissipation environment inside and outside the unit is good?
Fault diagnosis process:
Is outdoor ambient temperature higher than 53?
Is heat dissipation of the indoor unit
Does the outdoor fan work normally?
Overheat and high
temperature protection
N
20 minutes after the complete
unit is powered off.
and outdoor unit abnormal?
N
Y
Replace the
control panel AP1
End
Normal protection, please operate
it after the outdoor ambient temp-
Y
erature is normalized.
Improve the heat
Y
dissipation environ-
ment of the unit
1. Check if the fan terminal OFAN
is connected correctly
2. Disconnect the needle stand of
N
fan and measure the resistance
between two terminals of fan with
ohmmeter. The resistance shall be
less than 1K Ohm.
Y
N
Replace the
outdoor fan
53