Trouble phenomenon the air conditioner is not cooling, the outdoor unit starts and stops frequently

Trouble phenomenon the air conditioner is not cooling, the outdoor unit starts and stops frequently

When the air conditioner is frequently used in summer, many friends will encounter this problem, that is, the outdoor unit of the air conditioner frequently starts and stops, but the indoor unit is not cooled. Why? The air conditioner has a major failure? Or does the air conditioner at home have to be eliminated?

　　Actually, this failure of the air conditioner is not as terrifying as my parents think. You only need to prescribe the right medicine, report for repairs in time, and gradually troubleshoot the problem, and you can know that the air conditioner is not cooling in your home and what the problem is.

　　Fault phenomenon: the air conditioner is not cooling, and the outdoor unit starts and stops frequently

Reason analysis: door-to-door maintenance, no cooling, frequent start and stop of the outdoor unit, normal remote operation of the indoor unit, but the outdoor unit starts and stops in about three minutes, and the air is not cold within three minutes, which is initially judged as a refrigeration system failure. The pressure gauge tests the pressure on the low pressure side. Since the balance pressure is 1.1mpa when the machine is stopped, it gradually drops to 0.1mpa after the start and gradually returns to the balance pressure after the stop. When the external machine is running, it is found that all frost is formed from the filter to the capillary to the high pressure tube , It can be concluded that the filter is dirty.

　　Fault phenomenon: the air conditioner is not cooling, and the outdoor unit starts and stops frequently

Trouble phenomenon: the air conditioner is not cooling, the outdoor unit starts and stops frequently

　　 Solution: After replacing the new filter, everything is normal for the test machine.

　　 Air conditioning maintenance experience summary: For the frequent startup of the outdoor machine, first confirm that it is a circuit failure or a refrigeration system failure. Generally, the following phenomena will occur when the filter is blocked: the capillary outlet is frosted, and the evaporator will also be frosted. The detection low pressure pressure is lower than the normal value, the high pressure pressure is slightly lower than the normal pressure, the shutdown equilibrium pressure is close to the saturation pressure at the ambient temperature, and compression The exhaust temperature of the engine and the temperature of the housing increase. When the current is too large, the trip phenomenon is not necessarily the compressor failure. The failure phenomenon should be considered comprehensively. Generally, the current and maintenance pressure should be checked when the air conditioner is repaired. The high current and low pressure are the system blockage, and the filter and capillary tube should be checked.