1, check whether the power wiring is on:
Check the connectors and its wiring connection is powered on with the supply voltage, the adjusted to normal position range whether desoldering, coil to coil short circuit welding, replacement coil work differential pressure is not appropriate, the differential pressure, fluid temperature is too high, or replace solenoid valve commensurate change of proportion of solenoid valves have impurities to make electromagnetic valve of the main valve core and the moving core card dead, Carry out cleaning. If the seal is damaged, replace the seal and install the filter.
2, the solenoid valve can not be closed when at work:
Replace the seal if main valve core or moving iron core damaged, whether fluid temperature and the viscosity is too high, the replacement of the solenoid valve are valve core production impurities into the solenoid valve or moving iron core, cleaning, spring has been to or deformation, life need to be replaced, orifice balance hole blockage, timely cleaning, working frequency is too high or have to life, for products or product update.
