Common problems with refrigeration compressors (9)

Why does the compressor have to be shut down for at least 3 minutes before it can be restarted?

When the compressor starts, more refrigeration oil will enter the air conditioner system along with the refrigerant circulation. If there is not enough running time, the refrigeration oil will not be able to return to the compressor cavity in time. Frequent shutdown shortly after starting will cause the oil level inside the compressor to be low, which may easily cause poor lubrication of the mechanical moving parts of the compressor. In addition, the shutdown time of more than 3 minutes is mainly to give the system enough pressure balance time, otherwise the compressor will not be able to start normally due to the existence of high and low pressures.