Service manual

169

AP1

End

Mainly detect:

˄3˅High temperature and overload protection diagnosis (AP1 hereinafter refers to the control board of the

outdoor unit)

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?

●

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

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