I believe everyone has experienced a host or motor overload,perhaps it is a small problem for you,or perhaps you are troubled by this malfunction.
　　The causes of the malfunction are:
　　1.Voltage too low:The rated working voltage of a typical compressor is 380V,and it is allowed to fluctuate around 5%.
　　2.Loose wiring:Check the input power cord for signs of heating and burning.
　　3.The unit pressure exceeds the rated pressure:for example,a machine with a pressure of 0.7MPa is prone to overload when the actual pressure reaches 0.75MPa.
　　4.Blockage of the oil separator:Don't think that the things you have changed for a short time will no longer be blocked.The on-site environment is dirty,and there are many impurities in the oil and gas tank,which can easily cause oil blockage.
　　5.Contactor failure:replace with a new component