What's the matter with the air conditioner inside the air conditioner not working

    Check the power supply circuit for the operation of the outdoor unit. The indoor unit and the outdoor unit are connected by the AC contactor, and the power is also transmitted through this channel. Therefore, when the AC contactor is damaged, it means that the outdoor unit and the compressor cannot receive it. Power supply, the outdoor unit will not be able to work normally.

There is a certain limit to the amount of Freon. Too much or too little will cause the air conditioner to not work properly. At this time, the self-protection system of the air conditioner will have a high-voltage protection automatic switch for self-protection.

If the condenser is polluted, the outdoor condenser also has its own self-protection system, and its self-protection system will be activated when it is not cleaned regularly.

Air conditioning maintenance:

Remove debris from the vents to ensure normal ventilation. Observe whether the outdoor rack is loose, and clean the outdoor ventilation grill for foreign objects. Also, keep the vents unobstructed.

Indoor and outdoor heat exchanger surface cleaning to improve the efficiency of the heat exchanger. When cleaning the indoor heat exchanger, carefully remove the panel and wipe it with a soft rag; use a small brush to gently clean the heat exchanger of the indoor unit, so as to achieve the purpose of removing dust and harmful accumulations that can breed germs. But note that since the heat sink is a very thin aluminum material, it is easy to deform after being stressed, so be careful to brush it.

Does the compressor keep not working when the air conditioner is set to ventilation?

Most of today's cars are equipped with refrigeration systems. There are three main components to a refrigeration system that need to be protected. The compressor is a mechanical device that needs to be lubricated by refrigerated oil during operation. The refrigerant oil flows with the refrigerant. When there is a lack of refrigerant in the system, the low-pressure switch is disconnected, and the compressor cannot work, which plays the role of protecting the compressor. When the heat dissipation of the system is not good and the pressure is too high, the high-pressure switch is disconnected, the compressor stops working, and the cooling fan rotates at a high speed to cool down to protect the condenser from being damaged. There is a liquid storage tank next to the condenser and a glass observation hole on the top, which is convenient for observing the state of the refrigerant (when the system is working normally, there are several bubbles flowing, too much refrigerant, few bubbles, too many bubbles, indicating a lack of refrigerant, over Too much or too little will affect the normal operation of the system) There is a desiccant inside the liquid storage tank, which plays the role of filtering impurities and moisture. If the refrigerant contains moisture, it will freeze at the expansion valve, causing the refrigerant to not flow properly. Of course, if the refrigerant contains impurities, it will also block the expansion valve, making the system unable to work properly.

The working process of the air-conditioning system is as follows: the compressor compresses the low-temperature and low-pressure gaseous refrigerant from the low-pressure pipe that carries the heat in the vehicle into a high-temperature and high-pressure gaseous refrigerant, and the compressed refrigerant is sent to the condenser through the high-pressure pipe for heat dissipation. , into a high-pressure and high-temperature liquid refrigerant. After filtering impurities and moisture through the liquid storage tank, it expands into a low-temperature and low-pressure gaseous refrigerant at the expansion valve through the high-pressure pipe. The gaseous refrigerant absorbs the heat inside the car blown by the blower in the evaporation box. It becomes a low temperature and low pressure gaseous refrigerant, which is sucked and compressed by the compressor through the low pressure pipe to complete a working cycle. There is a defrost switch at the evaporation box. When the temperature is too low and frost occurs (the frost will block the evaporation box, so that the air conditioner cannot blow out cold air, and the air volume is also small, the operating temperature of the defrost switch is generally 1°-2°) will Disconnect the compressor circuit, the compressor stops working, there will be no frost, so the compressor work is intermittent. Now some cars use variable displacement compressors, which change the cooling intensity according to the temperature, so the work is not intermittent. The intermittent work of the compressor is realized by the electromagnetic clutch at the head of the compressor.

  Common malfunctions:

The compressor will not start if the system lacks refrigerant or the pressure is too high.

The defrost switch is faulty, the air conditioner has no wind coming out after a while, and then the air comes out after stopping for a while.

The refrigerant contains moisture, and the air conditioner will have cold air for a while and hot air for a while, but the air volume does not change.

The ventilation of the condenser is not good, the compressor cannot work normally, and the fan rotates at a high speed.

The air-conditioning system does not operate for a long time, the refrigeration oil is all precipitated, and the gaseous refrigerant corrodes the pipeline, causing the system to leak. Therefore, the air-conditioning system should be started at least once a month. Refrigeration oil circulates with the refrigerant and will protect the pipeline from corrosion.