1. Solenoid valve connection loose or line head off, the solenoid valve does not electricity, can tighten the line head.
2. Solenoid valve coil burn out, can remove the solenoid valve wiring, with a multimeter measurement, if open, solenoid valve coil burn out.The reason is that the coil is affected by damp, which leads to poor insulation and magnetic leakage, resulting in excessive current in the coil and burning, so the rain should be prevented from entering the solenoid valve.In addition, the spring is too hard, the reaction force is too large, the coil turns too few, not enough suction can also cause the coil to burn.
3. The solenoid valve is stuck.The fit gap between the spool sleeve and the spool of the solenoid valve is very small (less than 0.008mm), and it is generally single-piece assembly. When there are mechanical impurities brought in or too little lubricating oil, it is easy to get stuck.The fundamental solution is to remove the solenoid valve, take out the spool and the spool sleeve and clean, so that the spool action in the sleeve flexible.When disassembly, attention should be paid to the assembly sequence and external connection position of each component, so as to reassemble and connect correctly. Also, check whether the oil sprayer hole is blocked and whether the oil is sufficient.
4. Air leakage.Air leakage causes insufficient air pressure, making it difficult to open and close the forced valve. This is caused by damage to the sealing gasket or wear of the slide valve, causing several cavities to leak.