air conditioner heating evaporator frosting?
So Zhao Yu will first talk about what happens when the air conditioner is heated and the indoor evaporator is frosted. When our air conditioner is heating normally, the indoor evaporator is hot. If the air conditioner is heating normally, the evaporator will frost, we don’t need to worry about it. It is not a fault. The indoor evaporator frost is because the air conditioner is automatically defrosting.
If we turn on the air conditioner, there is no hot air or no blowing air at all. At the same time, the evaporator is frosted, it means that the air conditioner has a fault. It may be the following reasons:
1, the four-way valve of the air conditioner is damaged, the four-way valve of the is stuck, and the air conditioner cannot be converted to the heating mode.
2, the four-way valve is not powered on, so the four-way valve is not powered on, and the air conditioner will not heat up. Refrigeration mode is turned on. In winter, the outdoor temperature is relatively low, so the indoor evaporation temperature will also drop, causing the evaporator of the air conditioner to freeze. Therefore, we need to check whether the signal line from the internal unit to the external unit is broken, resulting in the four-way valve being powered. If not, we need to check whether the computer board of the indoor unit is damaged, resulting in the four-way valve of the external unit being powered on.
3, air conditioner remote control is turned on to refrigeration mode, and in winter, the internal unit is easy to freeze.
External evaporator frosting
So Zhao Yu will talk about it next, what is the frosting of the outdoor evaporator for air conditioning heating? Under normal circumstances, we call the radiator of outdoor units, condenser, . When the air conditioner is heating, the four-way valve changes the flow direction of the refrigerant, so the outdoor condenser becomes an evaporator. When the air conditioner is heating normally, if the outdoor radiator is frozen and frosted, we don’t have to worry about it. When the air conditioner is functioning normally, the external unit will be defrosted every once in a while. When the air conditioner is heated normally, the external unit is frosted, not a malfunction.
Then if the heating effect of the air conditioner is not good, or does not heat it up. At the same time, the external machine frosted. Then the automatic defrosting system of the air conditioner has a malfunction. So how do we troubleshoot the fault?
1, the outdoor tube temperature sensor of the air conditioner is damaged. Or the wire is broken, causing the air conditioning computer board to fail to detect the temperature of the outdoor pipeline, resulting in the inability to defrost.
2, the computer board of the air conditioner is damaged, resulting in the inability to automatically defrost.
3, the outdoor four-way valve is stuck, causing the air conditioner to be unable to convert and the air conditioner to be defrosted. Outdoor unit frosting.
So, we still need to detect the fault points of the air conditioner bit by bit. We don’t care about the frosting of the internal or external evaporator, which is normal. Not a malfunction. Only when the air conditioner is not heated and the internal and external units are frosted, we need to find the fault.
Is it normal for the air conditioner to frost and sometimes white smoke comes out?
Is it normal for the air conditioner external unit to emit white smoke in winter? Actually it is normal, we don't need to pay attention to it. This is because the ice layer of the external unit melts when the air conditioner is defrosted. With the outdoor unit, the temperature is relatively low. So this phenomenon occurs. Actually it's not white smoke. It is the water vapor generated by the air conditioner when heating the ice layer. When water vapor encounters relatively cold air, it condenses into water droplets, producing white water vapor.
Is it normal to heat the air conditioner for a while?
Our air conditioners turn for a while when they are heated in winter. Moreover, as the outdoor temperature gets lower and lower, the stop time will become longer and longer. This is air conditioning in defrosting. Don't worry about it.
