1. Lack of refrigerant in air-conditioning

Air conditioners do not cool a common reason is the lack of refrigerant, for fluorine system air conditioning units, is the lack of fluorine, if you find that the cooling effect of your home air conditioning is not as good as before most likely because of the lack of refrigerant or leakage.

2、Mismatch between the cooling and heating capacities of air conditioners and the places where they are used

Air conditioner horsepower related to the cooling effect of the air conditioner, if the air conditioner horsepower and the size of the space does not match the size of the home area is too large, and the air conditioner horsepower is too small, will lead to insufficient air conditioning cooling capacity will result in air conditioning does not cool the situation. Generally speaking, 1 horsepower air conditioning use area within 10 square metres, and the house space area of 10-18 square metres of the house to choose 1.5 horsepower air conditioning, and so on the air conditioning use of space area the larger the air conditioning to choose a large number of horsepower. And some although the air conditioning power and room area seems to match, but because the room is relatively airtight, or the room has a heat source of heat, or glass room sunshine, this situation cooling effect is certainly not good.

3、High outside ambient temperature

This does not cool the situation is common in our outdoor unit installed in a relatively closed space or the temperature around the unit is too high, so it is extremely easy due to the outdoor unit where the small space of the air does not circulate, resulting in the heat radiator out of the heat there is no way to transfer to the outdoors and make the air conditioning refrigeration effect is not obvious; there is another is when the outdoor temperature is too high, the national standard of air conditioners stipulate that the normal operating temperature range is -7 ℃ to 43 ℃, if the temperature is too high air conditioning will appear cooling capacity decline.

4、Connecting the copper pipe is too long

According to the provisions of the air conditioning installation or maintenance process, when the air conditioning installation of indoor and outdoor units connected to the pipeline exceeds the standard length of more than 5 metres, the refrigerant should be replenished in a timely manner. According to different pipe specifications or different cooling capacity of air conditioning models, the use of electronic scales quantitative additional refrigerant to ensure air conditioning performance (cooling and heating effect), otherwise, when the air conditioning lengthening pipeline without timely replenishment of refrigerant will lead to air conditioning refrigeration or heating operating pressure is low, and continue to affect the performance. After exceeding the standard length of 5 meters, the refrigerant should be replenished according to the specifications of the air pipe connected to the pipeline according to the requirements of the operation process, and the refrigerant should be replenished according to the specifications of the air pipe connected to the pipeline, and the refrigerant should be replenished according to the different air pipes as follows: when exceeding the standard length of 5 metres, 16g / Φ9.52mm air pipe per metre, 16g / Φ12.70mm air pipe per metre, 18g / Φ15.88mm air pipe per meter.

5, air conditioning voltage is not enough to cause

Peak power supply voltage will be unstable, not up to the normal voltage required for air-conditioning operation, the compressor can not work properly, the gaseous refrigerant pressure is insufficient, which will lead to air-conditioning does not cool or cooling effect is poor, a large number of air-conditioning operation at the same time during the high temperature is more likely to occur this phenomenon. You can install a voltage regulator, or fixed-frequency air-conditioning replacement for inverter air-conditioning, general inverter air-conditioning wide voltage design, can be in the range of 150v-268v normal start.

6, air-conditioning compressor overheating protection

For ordinary household air conditioners on the market, if the ambient temperature is as high as 50 degrees Celsius, far beyond the condenser's ability to dissipate heat, then the compressor will enter the overheating protection, and can not be normal cooling. This is caused by the principle of air-conditioning design, and is not a bad quality of air-conditioning.

Three conditions are most likely to lead to overheating protection

(1) The external unit of the air conditioner is exposed to the hot sun for a long time and is continuously exposed to the sun.

2) The top floor, with the external air-conditioning unit also located on the roof, is super-high in temperature as it is baked on top and baked underneath.

(3) The air conditioner is surrounded by obstacles, such as the outside unit is installed in the shutters, resulting in heat dissipation can not be normal, the compressor overheating protection can not be normal cooling

7, long time without cleaning maintenance

Because the outdoor unit is installed in the outdoor, we are easy to ignore, the outdoor unit after a long time will make the radiator above the adsorption of a lot of dust, resulting in poor radiator cooling effect and air conditioning does not cool. In addition, the long use of air conditioning without cleaning and maintenance will lead to room air unhygienic, easy to cause air conditioning disease, increase in power consumption, shorten the use of air conditioning life and so on.

8. Other factors leading to

The air conditioner not cooling may also be caused by other factors, such as the air conditioner's compressor, the refrigeration system dirty blockage or ice blockage; four-way reversing valve internal leakage, these are common causes.