Judgment of the failure of piston compressor in starting

Judgment of the failure of piston compressor in starting Piston compressor It is a type of compressor commonly used in industrial refrigeration. Most piston compressors use a semi-closed shape, which is simple and convenient to maintain and repair. It is widely used in large supermarkets, cold stores, laboratories, and various refrigeration equipment. The newly purchased piston compressor will encounter various small problems when it is replaced and installed in the original system. Among them, it is difficult to start the compressor, which is one of the common problems. Today, the editor will tell you: the piston compressor has encountered difficulties in starting Fault diagnosis. The piston compressor cannot start normally, especially the new compressor in the old system, then we may have to consider whether it is a system problem before judging whether it is a compressor problem. 1. Power failure: power failure, low voltage, phase loss 2. Electrical circuit failure: loose fuse and contactor wiring 3. Motor failure; 4. High crankcase pressure; 5. The energy is in the high load position; 6. The temperature of the refrigerant water reaches the set value of the temperature controller or the temperature controller fails; 7. Pressure relay: The set value is too low, the alarm is not reset, and it is malfunctioning. 8. The thermal relay is not reset after the action; 9. Low oil pressure, normal oil pressure cannot be established; 10. The cooling water and cooling water of the cold and salt water unit, the water flow relay alarm or the water flow relay failure. If the problem is not within the above ten reasons, then we may have to consider whether the piston compressor itself is malfunctioning, which must be coordinated with the dealer.