Troubleshooting method of solenoid valve failure not working

When dealing with the failure of the solenoid valve of the switching system, the appropriate time should be selected to deal with the solenoid valve when it is out of power. If the processing cannot be completed within a switching gap, the switching system can be suspended and handled calmly.

Check from the following aspects:

(1) The solenoid valve connector is loose or the wire tip is off, the solenoid valve is not electric, and the wire tip can be tightened.

(2) Solenoid coil burned out, you can remove the solenoid valve wiring, measurement with a multimeter, if open, the solenoid coil burned out.

The reason is that the coil is damp, causing poor insulation and magnetic leakage, causing the current in the coil to be too large and burned, so it is necessary to prevent rain from entering the solenoid valve. In addition, the spring is too strong, the reaction force is too large, the coil turns are too few, and the suction is not enough can also make the coil burn. In case of emergency, the manual button on the coil can be pressed from the "0" position in normal operation to the" 1" position to make the valve open.

(3) The solenoid valve is stuck. The spool sleeve of the solenoid valve has a small clearance with the spool (less than 0.008mm), which is generally a single piece assembly, and it is easy to get stuck when there are mechanical impurities or too little lubricating oil. The treatment method can be steel wire through the small hole of the head to make it spring back. The fundamental solution is to remove the solenoid valve, take out the spool and spool sleeve, and clean it with CCI4, so that the spool is flexible in the valve sleeve. When disassembling, attention should be paid to the assembly sequence and external wiring position of each component, so as to reassemble and wire correctly, and check whether the oil spray hole is blocked and whether the lubricating oil is enough.

(4) Air leakage. Air leakage will cause insufficient air pressure, which makes it difficult to open and close the forced valve, because the sealing gasket is damaged or the spool valve is worn and several cavities are trapped.