Common problems with refrigeration compressors (4)

How to make basic judgments and handle compressor failures?

Unable to start, no suction and exhaust pressure: First check the compressor wiring, pipeline connection, main and auxiliary coil impedance, compressor insulation withstand voltage and other basic items. If everything is normal, it is recommended to remove the compressor and run it idle to check whether there is suction and exhaust.

The suction and exhaust method is: when the compressor is running, press your finger on the exhaust port for a few seconds, then release it, and observe whether there is gas spraying. It is normal for a small amount of oil to spray out. If there is suction and exhaust, and the exhaust pressure is high, it means that the compressor can work normally, otherwise the compressor is abnormal.