The solenoid valve does not work when energized
Check whether the power cable is bad → Reconnect the power cable to the connector
Check whether the power supply voltage is within the ± working range -→ normal position range
Whether the coil is unwelded → rewelded
Coil short circuit → Replace coil
Whether the working pressure difference is inappropriate → adjust the pressure difference → or replace the appropriate solenoid valve
The fluid temperature is too high → replace the appropriate solenoid valve
Impurities make the main valve core and moving core of the solenoid valve stuck to clean, if there is seal damage should be replaced and the filter should be installed
The liquid viscosity is too large, the frequency is too high and the life has to → replace the product
The solenoid valve cannot be closed
The seal of the main spool or iron moving core has been damaged → Replace the seal
Fluid temperature, viscosity is too high to replace the solenoid valve
There are impurities into the solenoid valve spool or moving core → clean
Spring life has reached or deformation → replacement
Throttle hole balance hole blockage → timely cleaning
The working frequency is too high or the service life has reached → change the product or update the product
Other circumstances
Internal leakage → Check whether the seal is damaged and the spring is improperly assembled
External leakage → loose connection or broken seal → tighten screws or replace seals
Noise when energized → fasteners on the head loosen and tighten. Voltage fluctuation is not allowed within the range, adjust the voltage. Core suction surface impurities or uneven, timely cleaning or replacement.
