How to troubleshoot the solenoid valve?

Solenoid valve does not work after power on

Check whether the power supply wiring is bad → re-wire and connect the connector
Check whether the power supply voltage is within the ± working range-→ adjusted to the normal position range
Whether the coil is de-welded → re-welded
Coil short circuit → replace coil
Is the working pressure difference not suitable → adjust the pressure difference → or replace the proportional solenoid valve
Fluid temperature is too high → replace the proportional solenoid valve
The main valve core and moving iron core of the solenoid valve are blocked by impurities → clean, if the seal is damaged, replace the seal and install the filter
The viscosity of the liquid is too high, the frequency is too high and the service life has reached → replace the product

Solenoid valve cannot be closed
The seal of the main valve core or iron moving core is damaged → replace the seal
Whether the fluid temperature and viscosity are too high → replace the solenoid valve
Impurities enter the valve core or moving iron core of the solenoid valve → clean
Spring life has reached or deformed → replace
Throttle balance hole clogging → timely cleaning
The working frequency is too high or the service life is over → change the product or update the product

Other situations
Internal leakage → Check whether the seal is damaged and the spring is poorly assembled
External leakage → the connection is loose or the seal is broken → tighten the screw or replace the seal
There is noise when power is applied → The firm parts on the head are loose and tightened. If the voltage fluctuation is not within the allowable range, adjust the voltage. The impurities or unevenness of the iron core suction surface should be cleaned or replaced in time.