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Ten reasons why central air conditioning is not cooling

Ten reasons why central air conditioning is not cooling Today, go to the user's home for after-sales with the after-sales master. It has been checked that the outlet and return vents of each indoor unit are normal. When opening the window of the outdoor unit, a heat wave rushed towards us. "The heat dissipation of your external machine is not good, you need to make a wind guide cover," the after-sales master said. It turns out that this home is an outdoor unit with wind up. The outdoor unit is located at the position of the grilled external unit reserved by the developer. The location of the external unit is narrow, and the outdoor unit is only one meter away from the top, causing the hot air blown out by the outdoor unit It bounced back to the outdoor unit, which prevented the heat from dissipating and also caused poor indoor results. On the way back, the company's after-sales master told me the reasons why he encountered no refrigeration in recent years. 1. The indoor unit is out of wind Like the reasons for the poor heat dissipation of the outdoor unit, the indoor unit may also have poor air supply. In order to pursue beauty, some users make the air outlet of the indoor unit very narrow. The standard outlet height of the manufacturer is 15 cm. Some users make the air outlet even less than 10 cm. It looks very beautiful, but the cold wind blows If you don't go out, the effect will not come naturally. 2. Short circuit of air conditioner This situation is more common in the case of the next exit and the next exit and the side exit. It should be that the air outlet and the air outlet are too close, so that the wind just blown out is sucked back, and there is no effective circulation in the room, making The set temperature cannot be reached in the air-conditioned room. 3. Incorrect positioning of the internal unit of the air conditioner This kind of situation is more common in the guest restaurant. Because of the positioning error, the cool wind from the restaurant is directly blown to the return air of the living room, making the living room machine judge wrong, thinking that the room has reached the set temperature, and runs at a low speed. In fact, the temperature of the living room is still Very high. 4. Freon is not enough This is a normal situation. It is generally seen in air conditioners that have been used for four to seven years. The air conditioner is not completely uncooled, but the cooling effect is not good enough. This is because the air conditioner uses Freon as the refrigerant, which will evaporate for a long time. In addition, the problem of freon leakage and the machine itself caused by improper installation cannot be ruled out. Adding refrigerant can solve the problem of central air conditioning not cooling! 5. The voltage of the power supply is not enough The power supply voltage is unstable and often fails to reach the normal voltage. This phenomenon is more likely to occur especially during peak power consumption. Of course, this kind of problem is obviously not solved by a skilled air-conditioning maintenance master. We must start with providing a stable voltage to solve the problem and maintain the normal power supply voltage. 6. The air conditioner is smaller For example: small-power air-conditioning tubes have a large area of ​​the room, and some air-conditioning power and room area seem to match, but because the room is relatively closed (such as doors and windows open, etc.), or the room has a heat source of heat (such as a computer More often) Of course, the glass house is also one of the heat sources, and so on. Match the cooling capacity required by the power space of the air conditioner; change the conditions of the use environment; increase the airtightness of the use environment; reduce the heating source in the use environment of the Mitsubishi air conditioner and so on to solve the problem of non-cooling. 7. The ambient temperature is too high This is the situation we encountered today. This kind of non-refrigeration situation is common when our outdoor unit is installed in a relatively closed space or the temperature around the outdoor unit is too high. This is extremely easy because of the small space where the outdoor unit is located. If there is no air circulation, the heat dissipated by the radiator cannot be removed and the central air conditioner is not cooled. 8. The central air conditioner is not cleaned and maintained for a long time The purchase of a central air conditioner does not mean that you can sit back and relax. Because the outdoor unit is installed outdoors, after a long period of use, it will attract a lot of dirt and other dirt on the radiator, so the radiator has a poor heat dissipation effect and the central air conditioner does not cool; in addition For a long time, if the central air conditioner is not maintained for a long time, it will make the room air unhygienic, more prone to central air conditioner diseases, increase power consumption, and shorten the service life of the central air conditioner. Clean and maintain the central air conditioner frequently. 9. The copper pipe between the outdoor unit and the indoor unit is too long Some central air conditioners have too long ventilation ducts due to the need of installation or unreasonable installation, so the low heat transfer efficiency will also cause the central air conditioner not to cool. Try to shorten the length of the copper pipe between the outdoor unit and the indoor unit of the central air conditioner. 10. Failure code There is a corresponding code prompt for the failure of the central air conditioner. At this time, you need to ask professional after-sales personnel to come to the door for maintenance. After-sales personnel will quickly determine the cause of the failure according to the failure code and solve the failure. If your home Mitsubishi Electric central air conditioner has a poor cooling effect, please call our after-sales phone 400-667-8830, and we will promptly arrange professional after-sales personnel to visit and repair.

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