Several manifestations of air conditioning compressor failure

Several manifestations of air conditioning compressor failure are as follows:

1, the compressor does not run after being electrified, and the protector acts. Usually, the compressor loses oil or impurities enter, which leads to shaft locking or cylinder sticking.

2. The compressor suction and exhaust valve is damaged, and the system does not cool or the cooling effect is poor. Usually, the air-conditioning compressor suction valve and exhaust valve are not closed correctly.

3. The pipeline collides with the casing, the fixing bolt of the compressor is loose, and the damping block falls off. This kind of problem often occurs in maintenance work, and generally has little effect on refrigeration performance.

4, open circuit or action temperature point becomes smaller. This problem is often easily confused with a slight short circuit between windings. The difference is that the working current is normal when the thermal protector is damaged, and the current is too large when the winding is short-circuited. Usually, the thermal protector of the air conditioner compressor is damaged.

5. When the circuit is broken, the power supply is normal and the compressor does not work; In case of short circuit and shell collision, the protector acts or fuses after being electrified. Usually, the air-conditioning compressor is short-circuited, open-circuited, and the winding touches the shell grounding fault, which is difficult to judge, and it should be judged according to the measured current.