Fault 1: power does not move Cause analysis: bad power connection; power supply voltage changes are not allowed within the scope of the coil short circuit or burnout: connect the power cord; adjust the voltage within the normal range; replace the coil fault two: open the valve The fluid can not pass the analysis: fluid pressure or working pressure does not meet; fluid viscosity or temperature does not conform to; plug valve core and moving around the mixing of dirt, impurities; valve pre-filter or pilot valve hole plugging; operating frequency too High or life-expired treatment: adjust the pressure or working pressure or replace the appropriate product; replace the appropriate product; internal cleaning, the valve must be installed before the filter valve; timely cleaning filter or pilot valve hole; re-election model or product Replacement of new products Failure three: the valve can not cut off the fluid Cause Analysis: Fluid viscosity does not meet; fluid temperature does not comply with; spring deformation or the end of life; seat defects or adhesion stolen goods; seal out prolapse or deformation; balance Hole or orifice clogged; use of the working frequency is too high or life expectancy Treatment: replacement of suitable products; replacement Of the products; add gaskets or replace the spring; cleaning, grinding or updating; update, re-assembly; timely cleaning; re-election model or new product replacement Fault 4: Analysis of leakage reasons: loose pipe connections; Failure to deal with: Tighten the bolt or take over the thread; replace the seal Fault 5: severe leak Cause Analysis: fluid temperature does not meet; pilot seat and the main valve seat impurities or defects; pilot valve and the main valve gasket prolapse or deformation; Spring assembly is not good, deformation or life expectancy; operating frequency is too high Handling methods: adjust the fluid temperature or replacement; if the cleaning or grinding repair or replacement; replacement of gaskets; replace the spring; re-election model or replacement of new product failure Six: the noise is too large when the power is on Cause Analysis: Loose fasteners; Voltage fluctuations, not within the allowable range; Fluid pressure or working pressure is not suitable; Fluid viscosity does not meet; Armature suction surface with impurities Treatment: Tighten; Normal range; adjust the pressure or working pressure or replace the product; replace the suitable product; promptly clean