Answer: (1) Fault phenomenon. The screw air compressor runs idle for a long time, but the motor does not stop.
(2) Cause analysis. The main cause is the failure of the time relay. The screw compressor is generally set to stop the motor after idling for 15~20 minutes. If the motor does not stop running while running idle, the time relay should be checked.
(3) Elimination method. Check the control circuit and adjust the time relay.
