Electromagnetic reversing valve failure causes and solutions

Electromagnetic reversing valve fault causes and solutions 9 of the following, in addition, if the internal leakage of the directional valve, resulting in leakage of high-pressure refrigerant gas to the low pressure side, can not make the normal pressure on both ends of the directional valve piston, it should be Replace the reversing valve. If the pressure difference in the refrigeration system is too large to reverse the direction of the diverter valve, check the pressure in the refrigeration system or find leaks and fill the refrigerant. If the four-way valve slide does not move or the action is not in place, the end of the wooden handle of the screwdriver can be used to check the judgment, and the valve body is gently tapped, and the AC 220v power supply is turned on or off from time to time. Repeatedly several times, the armature is heard. When the sound is combined with the gas commutation sound in the valve body, it can be determined that the directional valve basically returns to normal operation.

1. When the electromagnetic reversing valve coil is opened, short-circuited or burned, the valve core cannot be closed, causing the slider to not move. Should be replaced.

2. The solenoid valve armature is stuck, the valve core cannot move, causing the slider to not move. Can open valve body cleaning adjustment.

3. When the power supply voltage is lower than the rated value of the solenoid valve, the pressure difference between the inlet and outlet of the electromagnetic valve exceeds the valve opening capacity. At this time, the valve often emits “squeaky” noise, causing the valve core to fail to close. Should improve the power supply.

4. The flow direction of the solenoid valve is reversed, causing the valve core not to move. The flow direction should be adjusted.

5. The system has high temperature, high pressure and impurities inside the machine, causing the slider to deform and get stuck. Should be replaced as well.

6. The remanent magnet sucks the valve core or the valve core is stuck. After the power is turned off, the solenoid valve cannot be closed. Cleaning adjustment, if no effect replacement.

7. The solenoid valve seal is damaged or the fastening screw is loose, causing refrigerant leakage. Replace the gasket and tighten the screws.

8. The capillary on the valve is blocked or broken; or the system is leaking so that the slider does not move. Clean the capillary or use a copper tube slightly thicker than the broken capillary.

9. There is dirt in the valve, damage to the valve seat or valve stem, and spring force is too small, causing the solenoid valve to close. Clean and adjust or replace the spring.