1. The solenoid valve does not work after being energized

Check whether the power wiring is bad → re-wiring and connector connection

Check whether the power supply voltage is in the ± working range - → adjust to the normal position range

Whether the coil is desoldered → resoldered

Coil short circuit → replace the coil

Whether the working pressure difference is inappropriate → adjust the pressure difference → or replace the corresponding solenoid valve

The fluid temperature is too high → replace the corresponding solenoid valve

Impurities make the main valve core and moving iron core of the solenoid valve stuck → clean, if there is any seal damage, replace the seal and install a filter

Buried nozzles with different ranges

The viscosity of the liquid is too high, the frequency is too high and the life is over → replace the product

2. The solenoid valve cannot be closed

The seal of the main spool or iron moving core is damaged → replace the seal

Whether the fluid temperature and viscosity are too high → replace the corresponding solenoid valve

Impurities enter the solenoid valve to produce the spool or moving iron core→clean

The life of the spring has expired or is deformed→replace

The orifice balance hole is blocked→clean in time

The working frequency is too high or the service life has expired → choose another product or update the product

3. Other situations

Internal leakage → check whether the seal is damaged and the spring is not assembled properly

External leakage→loose connections or broken seals→tighten screws or replace seals

There is noise when the power is on → the fasteners on the head are loose, tighten them. The voltage fluctuation is not within the allowable range, adjust the voltage. Impurities or unevenness on the suction surface of the iron core should be cleaned or replaced in time.