The common drawbacks of magnet manufacturers are that the magnet is not postured. It needs to be checked from the following levels:
(1) If the relay terminal is loose or the wire knot bursts out, the magnet cannot be electrified, and the wire knot can be tightened.
(2) Steam leakage. Steam leakage will cause insufficient gas working pressure, which makes it difficult to open and close the forcing valve. The reason is that the sealing gasket is damaged or the rotary vane pump is damaged.
(3) The magnet is stuck. The mutual cooperation gap between the rotary vane pump sleeve of the magnet and the valve core is not large (less than 0.008mm), and some of them are installed in parts. When there is mechanical equipment residue or too little grease, it is easily stuck. The solution is to use stainless steel wire to poke through the small round hole at the top of the head to make it spring back. The solution that the magnet manufacturer told you is to remove the magnet, remove the valve core and the valve core sleeve, and use CCI4 to clean it, so that the valve core can be dexterously positioned in the valve sleeve. When disassembling, pay attention to the installation sequence of each component and the external wiring direction, so as to facilitate the re-installation and proper wiring. It is also necessary to check whether the oil pump hole of the pneumatic triplet is blocked and whether the grease is sufficient.
(4) If the magnet coil is burnt, the wiring of the magnet can be removed and measured with a digital multimeter. If it leads the way, the magnet coil will burn out. The reason is that the coil returns moisture, which causes the insulation layer to be bad and magnetic leakage, resulting in excessive current in the coil and burning, so it is necessary to prevent precipitation from entering the magnet. In addition, I feel that the spring is solid, the reaction force is too large, the number of turns of the coil is too small, and the adsorption force is not good, which can also cause the coil to burn. In case of emergency, the manual button on the coil can be turned from the '0' position to the '1' position during abnormal operation, so as to prompt the valve to open.