Reason: In the action of refrigerator bai, the suction side of du's refrigeration series compressor is called dao low pressure side, and its pressure zhuan is slightly higher than shu atmospheric pressure. The exhaust side of the compressor is called the high pressure side, and the pressure is up to 117.7 pa (12 kg/cm2). The pressure difference between the two sides is very large, and the two sides of the system still maintains this pressure difference after shutdown. If you start immediately, the compressor piston pressure, motor starting torque can not overcome such a high pressure difference, so that the motor can not start, in the state of gridlock, the motor winding current will increase sharply, the temperature increases, if the time is too long, it is likely to burn the motor.