The phenomenon of air conditioning icing whether in the northern winter or the southern winter is easy to occur, because the temperature difference between indoor and outdoor in winter is very large, air conditioning due to long-term operation is likely to occur on a part of the problem, resulting in air conditioning icing phenomenon, so if it is ice inside the air conditioning how to go? Because the operation of air conditioning is complex, it is not clear enough to judge only from the phenomenon of icing. Next, Xiaobian will take you to understand the reasons for icing in air conditioning.
Causes of air conditioning freezing:
There are various reasons for the phenomenon of icing in air conditioners, which is also a common problem. Icing in air conditioners can lead to heating difficulties or air conditioners cannot operate. Here’s a look at seven reasons your air conditioner freezes:
Reason 1, insufficient refrigerant: Split air conditioning in use for a long period of time, there will be refrigerant leakage or leakage. When the refrigerant in the refrigeration system is reduced, the evaporation pressure will be too low, resulting in the freezing of the evaporator. The freezing position is generally in the front part of the evaporator. Elimination method is to deal with the leakage site, add enough refrigerant, the fault will be eliminated.
Reason two, compressor failure: Similarly, after the air conditioning is used for a long period of time, the compressor compression efficiency is reduced, or the compressor distribution system is damaged, resulting in too low pressure and icing. The icing position is also in the front part of the evaporator, the former add some refrigerant, the fault can be eliminated. If the fault persists, replace the compressor.
Reason three, too much refrigerant: insufficient refrigerant will cause ice of air conditioning, so too much refrigerant will also cause ice of air conditioning, some air conditioners due to displacement, leakage and other reasons and re-injection of refrigerant, maintenance personnel improper operation of the excess refrigerant, resulting in too much refrigerant flow to the evaporator partial evaporation and ice. This kind of ice is formed around the back part of the evaporator and the compressor return pipe, and the excess refrigerant is discharged, and the fault is eliminated.
Four reasons, the evaporator is too dirty: after the air conditioner is used for a period of time, the dust in the air or the microorganisms generated by the evaporator will accumulate in the evaporator, hinder the air circulation, resulting in the reduction of heat exchange, the evaporator temperature is too low and icing. The icing position is in the back part of the evaporator. After the ice melts, flush the evaporator with water and use a soft brush along the finned brush. Be careful not to wet the electrical part. After cleaning, the fault will be removed.
Reason five, temperature controller failure: the gas pressure of the temperature sensing envelope of the mechanical temperature controller changes with the temperature, driving the temperature controller contact action. Due to contact adhesion, spring insufficient force and other reasons, the contact is often closed, the air conditioner starts continuously, resulting in icing. Replace the thermostat and remove the fault.
Reason six, small air volume: air conditioner used for a period of time, some fan blades stick there is a lot of dirt, affect the air supply, causing the evaporator icing, clear dirt, trouble elimination. There are also some fans due to mechanical and electrical failures and slow speed, small air volume, resulting in freezing of the evaporator. Mechanical reasons for bearing, bearing wear, resistance increases, speed slows down. Electrical faults are mostly capacitor charging and discharging failure or wind turbine turns short circuit, resulting in slow speed, even wind turbine winding burned, motor does not rotate. This icing phenomenon should be repaired or replaced depending on the specific situation.
What to do when the air conditioner freezes:
The reason for air conditioning icing is basically the above seven reasons, as long as we find the right reason, we can easily solve the problem. If the temperature controller failure caused by the air conditioning ice, then the need to replace the air conditioning temperature controller; If the check out is the air conditioning evaporator is too dirty, then you need to thoroughly clean the air conditioning evaporator, if the refrigerant is insufficient or more, then you need to exclude or add refrigerant; If it is the fault of the compressor, then it is best to replace the compressor of the air conditioner.
The reason for the phenomenon of freezing in air conditioning in winter is more complex, because the whole air conditioning is in operation, and the temperature difference between indoor and outdoor will affect the judgment of the problem air conditioning parts. If you find that your home air conditioning ice phenomenon in the winter, you should find the relevant maintenance personnel in time to repair, so as not to cause air conditioning leakage or more serious problems.
