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Six reasons why air conditioners don't cool

One: Freon is not enough (commonly known as "snow species" is not enough)

When the ambient temperature is about 35 degrees Celsius 1, low pressure 0.45MP2, high pressure 2.5MP and above 3, static pressure 1.1-1.2MP

This is a normal situation and usually occurs in old air conditioners that have been used for three to four years. The air conditioner is not completely refrigerated, but the cooling effect is reduced. This is because old-style air conditioners use Freon as the refrigerant, which will evaporate when used for a long time. Therefore, the user only needs to add a point to the regular air-conditioning repair point. Also, improper installation does not rule out problems with Freon leakage and the machine itself.

2: The power supply voltage is not enough

The normal starting voltage of the air conditioner is 220V + -10%. In China's power supply system with a phase voltage of 220V and a line voltage of 380V, almost all compressors above 200V can be started. Above 180V, 70-80% can be started, and above 160V, only some can be started. I did the experiments myself. It is almost impossible to start below 160V. According to experience, above 190V, the compressor start-up voltage is more reliable.

3: The power of the air conditioner is not enough

The general selection principles are: 150-250W / m2 during cooling and 250-350W / m2 during heating. In addition, factors such as space height, layer orientation, sealing performance and living population need to be considered.

Four: The external ambient temperature is too high

There is a relatively common saying: When the outdoor unit is in an environment above 43 °, it is difficult for most air conditioners to transfer indoor heat to the outdoors, resulting in non-refrigeration.

Five: Air conditioning is not cleaned and maintained for a long time

If the air conditioner can work normally without affecting human health, it is also necessary to prolong life as much as possible. Obviously, it is impossible to ignore it once it is bought and installed. Because the outdoor unit is exposed outdoors, it is easy to adsorb dust and sundries. If it is not cleaned for a long time, it will affect the heat dissipation performance of the machine and cause the cooling effect of the air conditioner to decrease. The indoor unit is related to human health. If it is not cleaned for a long time, it will breed bacteria, pollute the air, and make people sick.

Six: The copper pipe connecting the indoor unit and the outdoor unit is too long

The maximum allowable length of the connecting pipe of the air conditioner is no more than 8 meters, 1.5-2 no more than 10 meters, and no more than 2 no more than 15 meters. The height difference between the indoor and outdoor units does not exceed 5 meters.