Solenoid valve does not work after power on
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-welded.
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 → 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.
Solenoid valve cannot 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 to produce the valve core or moving iron core → cleaning.
Spring life has reached or deformed → replaced.
The orifice balance hole is blocked → timely cleaning.
The operating frequency is too high or the life is up to → re-elect or update the product
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.
