Solenoid valve gasket damaged or loose screws loose

Caused by the refrigerant leakage. Change the gasket and tighten the screws.
The valve capillary blockage or rupture; serious leakage caused by the slider does not operate. Cleaning capillary fracture capillary copper tube welding or thicker.
Dirt, the valve seat or valve needle valve memory impairment, and the spring force is too small, causing the solenoid valve closed lax. Clean and adjust or replace the spring.mini solenoid valve
In addition, if the solenoid valve internal leakage, caused by the high-pressure refrigerant gas leakage to the low-pressure side, the solenoid valve can not make both ends of the piston to establish a normal pressure, it should replace the solenoid valve. If the cooling system pressure difference is too large, it can not be the solenoid valve commutation, it is necessary to check the cooling system pressure or find a leak, and fill the refrigerant. If not action or action of the four-way valve slider is not in place, for examination to determine when the end of the screwdriver wooden handle, gently tap the valve body, from time to time to turn on or off 220v AC power supply, repeated several times to hear the armature suction chorus and the valve body gas commutation sound, you can determine when the solenoid valve is returned to normal.pneumatic auto drain