What's wrong with the newly bought Konka KH-LNS03 air-conditioning fan not blowing?

The reasons why the air conditioning fan does not blow may be:

1. Pressure protection switch failure.

2. Too much refrigerant will lead to protective shutdown.

3. Excessive ambient temperature will lead to system protection. Excessive ambient temperature in summer, direct sunlight and poor ventilation of outdoor unit will all cause compressor overheating protection, which will lead to the failure of outdoor unit of air conditioner.

4. Observe whether the outdoor unit has working sound (including outdoor unit fan and compressor). If the outdoor fan is running, the control circuit is basically normal. At this time, observe whether the compressor is started. If the compressor doesn't start, we should check whether the power supply is normal.

5. If there is no problem in the above inspection, then it is necessary to check whether the capacitor is damaged and the overload protector is short-circuited.

6. Sensor failure. Measure the resistance of outdoor coil sensor with multimeter. If the sensor resistance deviates greatly from the normal value, or there is an open circuit or short circuit fault, the sensor needs to be replaced.

7. AC contactor failure. Energize the AC contactor, and measure the outlet end of the AC contactor with a multimeter to see if there is a voltage of 380 V. If there is no voltage, it means that the AC contactor is damaged internally and needs to be replaced with a new one.