Reasons why the air conditioner does not cool

When summer comes, people often can't stand the hot weather. At this time, fans and air conditioners are needed to help people cool down. Generally speaking, because the temperature in the south is much higher than that in the north, almost every household must have an air conditioner. Compared with fans, air conditioners can automatically adjust the temperature and choose a comfortable temperature that suits you. In people's eyes, the cooling effect of air conditioners is much better than that of fans. This is probably because the air conditioner can adjust the temperature, while the fan only uses its own rotation speed to create wind to help you cool down.

What is a good air conditioner? Only its cooling effect can make it a good air conditioner. If its effect is not good, after you buy it home, it cannot provide you with the cool feeling and you will not be able to get through the hot summer. And relatively speaking, the price of air conditioners is not low. If you do the math, you'll find that one air conditioner is almost as expensive as a whole house of fans. Many people find that the air conditioner they buy does not cool them, and often at this time people still don’t know what is causing the problem.

Reasons why the air conditioner does not cool

One of the reasons why the air conditioner does not cool: not enough Freon (commonly known as "refrigerant" is not enough)

When the ambient temperature is about 35 degrees Celsius, 1. Low pressure 0.45MP 2. High pressure above 2.5MP 3. Static pressure 1.1-1.2MP

This is a normal situation, usually occurring in old air conditioners that have been used for three to four years. The air conditioner did not stop cooling at all, but the cooling effect was reduced. This is because old-style air conditioners use Freon as refrigerant, which will evaporate after long-term use. Therefore, users only need to go to a regular air conditioning maintenance point to add a little. In addition, improper installation may cause Freon leakage and problems with the machine itself.

The second reason why the air conditioner does not cool: the power supply voltage is not enough

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

The third reason why the air conditioner does not cool: the air conditioner power is not enough

The general selection principle is: 150-250W/square meter for cooling and 250-350W/square meter for heating. In addition, factors such as space height, level orientation, sealing performance and resident population must also be considered comprehensively.

The fourth reason why the air conditioner does not cool: the external temperature is too high

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

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The fifth reason why the air conditioner does not cool: the air conditioner has not been cleaned and maintained for a long time

If you want the air conditioner to function normally, not affect human health, and extend its life as long as possible, it is obviously impossible to just buy it and install it and then ignore it. Because the outdoor unit is exposed to the outdoors, it easily absorbs 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 conditioner. 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.

Reason 6 for the air conditioner 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 is no more than 8 meters for one horsepower, no more than 10 meters for 1.5-2 horsepower, and no more than 15 meters for more than 2 horsepower. The height difference between the indoor and outdoor units shall not exceed 5 meters.

Although air conditioning can help people get through the hot summer and people don't feel very hot when they are at home, you must remember that when using the air conditioner, don't set the temperature too low. Don't lower the temperature very much just to pursue coolness. This will easily make you catch a cold. When you are very cool in the house, it is usually very hot outside. This mixed temperature can easily make people catch a cold. Moreover, it is easy to get some diseases if you use air conditioning for a long time. So although air conditioning has many benefits, you must use it in moderation and not excessively, and don't turn on the air conditioner every day for the entire summer.