What Causes a Compressor to Fail?
1 Answers
Compressor failure can be caused by the following situations: 1. Winding short circuit, open circuit, and winding grounding to the casing: These faults are caused by the motor part of the compressor. When an open circuit occurs, the power supply is normal, but the compressor does not work. In cases of short circuit or grounding, the protector trips or the fuse blows when power is applied. If there is a slight inter-turn short circuit in the winding, the compressor can still operate, but its temperature becomes very high, the operating current is very large, and the thermal protector will trip shortly after operation. A multimeter can be used to check for open circuits and winding grounding to the casing. Slight winding short circuits are difficult to determine and should be judged based on current measurements. 2. Compressor vibration and noise: This often occurs during maintenance. Generally, it does not significantly affect refrigeration performance, but users may feel it is abnormal. The main causes include contact between pipes and the casing, detachment of damping blocks, and loosening of compressor mounting bolts. 3. Poor sealing of compressor suction and discharge valves: If the compressor's suction or discharge valves are damaged, even with sufficient refrigerant, the system cannot establish high and low pressure or may struggle to achieve qualified high and low pressure, resulting in no refrigeration or poor refrigeration performance. 4. Compressor seizure or stuck piston: The main causes of these faults are lack of oil or the entry of impurities. After power is applied, the compressor does not operate, and the protector trips.
