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AP1
End
Y
N
Y
N
Y
N
Overheat and high
temperature protection
Is outdoor ambient temperature higher than 53?
20 minutes after the complete
unit is powered off.
Is heat dissipation of the indoor unit
and outdoor unit abnormal?
Normal protection, please operate it after the
outdoor ambient temperature is normalized.
Improve the heat
dissipation environment
of the unit
Does the outdoor fan work normally?
1. Check if the fan terminal OFAN
is connected correctly
2. Resistance between any two
terminals is measure by an ohm
gauge and should be less than 1K
Ohm.
Replace the control panel
Replace the fan
capacitor C1
Replace the
outdoor fan
(3) High temperature and overload protection diagnosis (AP1 here in after refers to the control board of the outdoor unit)
Mainly detect:
Is outdoor ambienttemperature in normal range?
After the outdoor and indoor fans operating normally?
Is the heat dissipation environment inside and outside the unit is good?
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