6 possible reasons why the air conditioner is not cooling

6 possible reasons why the air conditioner is not cooling

The reasons why the air conditioner is not refrigerated are divided into non-air-conditioning faults and air-conditioning faults. Today we share the reasons for non-air-conditioning faults.

One of the reasons why the air conditioner is not cooling

Insufficient Freon (commonly known as "not enough refrigerant")

　　 1. Low pressure 0.45MP 2. High pressure above 2.5MP 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 uncooled, but the cooling effect is reduced. This is because old-fashioned air conditioners use Freon as a refrigerant, which will evaporate after long-term use. Therefore, users only need to add a little to the regular air conditioning repair point. In addition, it does not rule out the problems of Freon leakage and the machine itself caused by improper installation.

The second reason why the air conditioner is not cooling

Insufficient supply voltage

　　 The normal starting voltage of the air conditioner is 220V+-10%. In our country's power supply system with phase voltage of 220V and line voltage of 380V, almost all compressors above 200V can be started. When it is above 180V, 70-80% can be started, when it is above 160V, only a few can start. I have done the experiment myself. It is almost impossible to start below 160V. According to experience, the compressor starting voltage is more reliable when it is above 190V.

The third reason why the air conditioner is not cooling

Air conditioning power is not enough

　　 The general selection principle is: 150-250W/m2 for cooling and 250-350W/m2 for heating. In addition, factors such as space height, layer orientation, sealing performance and residential population must be considered.

Four reasons why the air conditioner is not cooling

The ambient temperature is too high

　　 There is a more common saying: when the outdoor unit is in an environment above 43°, most air conditioners are difficult to transfer indoor heat to the outdoors, resulting in no cooling.

Five reasons why the air conditioner is not cooling

The air conditioner is not cleaned and maintained for a long time

　　 If you want the air conditioner to function normally without affecting human health, and to extend the life as much as possible, obviously, it is impossible to ignore it once you buy it and install it. Because the outdoor unit is exposed to the outdoors, it is easy to absorb dust and debris. If it is not cleaned for a long time, it will affect the heat dissipation performance of the machine and reduce the cooling effect of the air conditioning. 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 reasons why the air conditioner is not cooling

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 cannot exceed 8 meters for one horse, 10 meters for 1.5-2 horses, and 15 meters for more than 2 horses. The height difference between indoor and outdoor units should not exceed 5 meters.