How to detect and replace the solenoid valve?

(1) When testing the solenoid valve, first use the multimeter to detect the quality of the electromagnetic coil, and measure the resistance of the coil with the ohm gear of the multimeter. If the needle does not swing, the coil is borken; if the resistance is very small or zero, the coil is short circuited. When the confirmation coil is normal, the coil can be connected to the rated voltage to check the fault of the valve body. If you can hear clicks and check the on-off condition, it shows that the solenoid valve is good.

(2) Replacement of four - way solenoid valve

When replacing the four way solenoid valve, the refrigerant in the refrigeration system should first be released, then the fixed screw fixed to the four way solenoid valve is removed, and the electromagnetic coil is removed. Then take the four way solenoid valve together with the piping and take note of the direction and angle of the piping.

To check the type and specification of the new four - way solenoid valve to be installed, first, take the pipe of the original four - pass solenoid valve to weld on the new four - way solenoid valve, keep the original direction and angle of the pipe, and keep the level of the four - pass solenoid valve. After the pipe is welded, the four way solenoid valve is welded back to the original position with the piping. After the four way solenoid valve and the piping are welded properly, the electromagnetic coil and the connecting wire are finally installed.

Since the four way solenoid valve is equipped with plastic seals, it is necessary to prevent the four way solenoid valve from overheating and burn the sealing parts when welding. In order to prevent overheating, the four way solenoid valve body can be placed in the water first, then the tube is lengthened and welded before welding. Therefore, when welding, four wet solenoid valves should be wrapped with wet towel. It is best to fill the system with nitrogen in the welding process. The purpose is to do oxygen free welding in order to prevent the formation of the four - pass solenoid valve in the tube and the movement of the sliding valve block in the four - pass solenoid valve.

What needs to be noticed is: when replacing the four - way solenoid valve, whether it is water valve or air valve, first of all, we should pay attention to the rated voltage and shape, and should pay attention to the good seal when installing. There should be no leakage or leakage. The connection line is fixed with a ligation line, and it should not be loosened.

This article is from Allicdata.