Inspection method:

1. The installation of the power supply air switch or leakage switch is wrong, resulting in tripping or peeling of the power cord after power-on.

2, the neutral line of the power line (N) is not directly connected to the power line through the air switch, resulting in abnormal circuit tripping.

3. Check whether the compressor is caused by short circuit or leakage.

4. Check whether the motor is caused by short circuit or leakage.