1. If it is normally closed, check if the power supply is disconnected; normally open check if the power is on. This is a common two types, other special types are less used, I do not know what your model is.
2, if the power is normal. Normally closed solenoid valve can not be closed, the general will not be burned coil, unless it can not be opened. Still check the valve chamber, because you do not provide more data, so can not determine the internal structure of the solenoid valve. However, it is nothing more than checking whether the rubber diaphragm is damaged or whether the slider movement is flexible. Check the inside of the valve chamber and the pipeline for impurities and foreign matter; the medium is clean and free of suspended matter. Verify that the line pressure meets the specifications on the nameplate.
3. It is important that your solenoid valve is used for a period of time, so the solenoid valve will not be reversed unless it has been disassembled prior to failure.
2, if the power is normal. Normally closed solenoid valve can not be closed, the general will not be burned coil, unless it can not be opened. Still check the valve chamber, because you do not provide more data, so can not determine the internal structure of the solenoid valve. However, it is nothing more than checking whether the rubber diaphragm is damaged or whether the slider movement is flexible. Check the inside of the valve chamber and the pipeline for impurities and foreign matter; the medium is clean and free of suspended matter. Verify that the line pressure meets the specifications on the nameplate.
3. It is important that your solenoid valve is used for a period of time, so the solenoid valve will not be reversed unless it has been disassembled prior to failure.