Answer: (1) Cause analysis.
1) The air intake valve is stuck and cannot be closed;
2) The air consumption suddenly decreases;
3) The load solenoid valve is faulty;
4) The pressure setting is too high;
5) The pressure sensor is faulty.
(2) Elimination method.
1) Eliminate the air intake valve fault;
2) Check the changes in air consumption;
3) Check and repair the load solenoid valve;
4) Adjust the pressure switch setting;
5) Repair or replace the pressure sensor.
