1, judging from the strength of the hot air blown out

When the air conditioner compressor is running, observe whether the outdoor unit has a thermal sensation, there is a thermal sensation, the freon is enough, no need to make up, no thermal sensation needs further investigation.

But this thermal sensation: if it is very hot, there is a lot of freon, if the thermal sensation is not strong, there may not be enough freon.

2, the air conditioning outdoor unit frequently start and stop, obviously the indoor temperature has not reached the set temperature, the external unit will still stop, it may be caused by fluorine deficiency compressor overheating protection.

3, the outdoor unit noise becomes louder, the noise is large, it may be the installation problem, the outdoor unit inside the pipeline and the shell contact caused by the impact.

The indoor seal is not good, resulting in the leakage of cold air, indoor sunlight, such as a large area of glass Windows, etc., resulting in the actual indoor temperature always can not reach the set temperature, so that the compressor can not stop, it will increase power consumption and noise.

In addition, the lack of fluorine will also make the compressor always in operation, so the noise will be significantly enhanced.

4, the thin copper pipe of the air conditioner is cool, the thick copper pipe is normal temperature, and the indoor air is not cold.

The reason is that the cooling effect is worse, and the thin tube is cooler than the thick tube.

This is caused by the lack of refrigerant, and the cold thin tube indicates that the compressor is working. The thick pipe is normal temperature, but the refrigerant is not enough.

5, the outdoor connection pipeline has obvious oil stains, freon leakage will exist oil stains. Emergency solution Try to find two wrenches, tighten the spot of oil leakage.