The solenoid valve terminal of the screw air compressor is loose or the thread terminal is dropped. The solenoid valve must not be energized, and the thread terminal can be tightened to solve the problem.

The solenoid valve coil of the screw air compressor is burnt out. If the solenoid valve coil is burned out, the wiring of the solenoid valve can be removed and measured with a multimeter. If it is open, the solenoid valve coil is burned out. The reason is that the coil is damp, which leads to poor insulation and magnetic leakage, resulting in excessive current in the coil and burns, so rainwater should be prevented from entering the solenoid valve. In addition, the tension spring is too hard, the reaction force is too large, the number of turns of the coil is too small, and the suction force is not enough, which can also cause the coil to burn. For urgent disposal, you can turn the manual button on the coil from the "0" position to the "1" position during normal operation to open the valve.

The solenoid valve of the screw air compressor is stuck. The cooperation gap between the slide valve sleeve and the valve core of the solenoid valve is very small (less than 0.008m), and it is usually installed in a single piece. When mechanical impurities are brought in or there is too little lubricating oil, it is easy to get stuck.,
Disposal method: Use a steel wire to poke through the small hole in the head to make it bounce back. The complete solution is to remove the solenoid valve, take out the valve core and valve core sleeve, and clean with CCI4 to make the valve core move sensitively in the valve sleeve.
When disassembling, pay attention to the installation sequence of the components and the orientation of the external wiring, so that the re-installation and wiring are correct, and check whether the oil spray hole of the lubricator is blocked and whether the lubricating oil is satisfactory.

The solenoid valve of the screw air compressor is leaking. Air leakage will result in a lack of air pressure, making it difficult to open and close the valve. The reason is that the sealing gasket is damaged or the slide valve is worn to form several cavities.
When checking the solenoid valve failure, you should wait for the solenoid valve to be dealt with when the solenoid valve is out of power, directly replace the solenoid valve to burn the coil, or repair the leakage of the valve body.