10-13 Explain the reasons why the screw air compressor cannot start and how to deal with it?

Answer: (1) Fault phenomenon. When the air compressor starts, the running indicator light does not light up and the motor does not start.

(2) Cause analysis.

1) Fuse burns out;

2) Protection relay operates;

3) Start relay fails;

4) Start button has poor contact;

5) Voltage is too low;

6) Motor failure;

7) Machine body failure;

8) Phase loss protection relay operates;

9) The air compressor fails to reset after a minor or major fault alarm.

(3) Elimination method.

1) Replace with a new fuse;

2) Check and calibrate the relay;

3) Check and repair the start button after checking that the power supply is normal;

4) Check and restore the power supply;

5) Repair and eliminate the motor fault;

6) Check the cause of the machine body fault and eliminate it;

7) Check the power supply and motor phase sequence;

8) Reset the alarm signal.