Solenoid valve failure and troubleshooting instructions

First, the solenoid valve does not work after being energized
    Check if the power wiring is defective → rewire and connector connection
    Check if the power supply voltage is within the ± working range - → adjust the normal position range
    Whether the coil is desoldered → re-weld
    Short circuit of coil → change coil
    Is the working pressure difference inappropriate → adjust the differential pressure → or replace the proportional solenoid valve
    Fluid temperature is too high → replace the proportional solenoid valve
    There are impurities that cause the main valve core and moving iron core of the solenoid valve to be stuck → for cleaning. If there is seal damage, replace the seal and install the filter.
    The viscosity of the liquid is too high, the frequency is too high and the life is up to → replace the product

Second, the solenoid valve can not be closed
    The seal of the main spool or the iron core has been damaged → replace the seal
    Whether the fluid temperature and viscosity are too high → replace the solenoid valve of the opposite port
    There are impurities entering the solenoid valve spool or moving iron core → cleaning
    Spring life has reached or deformed → replaced
    The orifice balance hole is blocked → timely cleaning
    The working frequency is too high or the life is up to → re-elect or update the product

Third, other situations
    Internal leak → check if the seal is damaged and the spring is not properly assembled
    External leakage → loose connection or seal is broken → tighten the screw or replace the seal
    There is noise when energized → the solid parts on the head are loose and tightened. The voltage fluctuation is not within the allowable range and the voltage is adjusted. The iron core suction surface is dirty or uneven, and it is cleaned or replaced in time.