Causes of frequent start of compressor in high and low temperature impact test chamber

The reason why the compressor is frequently started in the high and low temperature impact test chamber Under normal working conditions, the number of starts and stops of the compressor in the cold and hot impact test chamber shall not be more than 6 times per hour, otherwise it shall be regarded as failure The main reasons for the frequent start and stop of the compressor are: 1 The power supply voltage is too high or too low and unstable; Troubleshooting: after the power supply voltage returns to normal, connect the power supply or install the AC voltage regulator to provide a stable 380V power supply for the cold and hot shock test chamber 2 The disc bimetal of the over-current over temperature protection relay fails; Troubleshooting: replace the new over-current over temperature protection relay 3 The door seal of the cold and hot impact test chamber is not tight, and the air leakage is serious; Troubleshooting: repair and adjust the door seal or replace the door seal 4 Poor cooling effect of the condenser will reduce the cooling capacity of the compressor in the high and low temperature test chamber, cause overload operation of the compressor, increase the working current, cause the action of the overcurrent protection relay, cut off the power supply and stop the compressor When the bimetallic plate of the protection relay senses the temperature falling to the reset temperature, the contact is closed again, and the compressor is started and operated again, resulting in frequent start and stop of the compressor The main reasons for the poor cooling effect of the condenser are: there is dirt on the surface of the condenser; the ambient temperature of the test chamber is too high The removal methods of high and low temperature impact test chamber: clean the dirt of condenser regularly; improve the heat dissipation condition of cold and hot impact test chamber.