How to Troubleshoot Solenoid Valve

Troubles & Solutions

As a key component in automation systems, solenoid valve malfunctions can cause interruptions in the operation of the entire system. Solenoid valve troubleshooting is crucial for ensuring its long-term stable operation. When dealing with malfunctions, always start with the simplest possible causes and gradually eliminate them until the root cause is found. If the malfunction is complex or requires professional knowledge, it is advisable to seek assistance from professionals.

Solenoid Valve Cannot Open

Possible Reasons	Solution
Coil has no power	Ensure that the valve is normally open or normally closed, and use a voltmeter to measure the voltage at both ends of the coil.
Incorrect voltage/frequency	Ensure that the power supply matches the valve specifications, and measure the voltage at both ends of the coil.
Coil is burned out	Inspect the burned coil and replace it promptly.
Excessive pressure difference	Check the pressure difference at both ends of the valve and compare it with the valve specifications. The pressure difference can be reduced by lowering the input pressure.
Low differential pressure	Check the valve specifications. Pilot-operated solenoid valves require a very small differential pressure to operate properly.
Valve damage or deformation	Replace the solenoid valve
Dirt on the diaphragm	Clean the diaphragm. If necessary, replace damaged components.
Contaminated valve seat or valve	Clean the valve. If necessary, replace damaged components.
Corrosion (rust)	Replace damaged components
Missing components after disassembly	Install the missing components

Coil is burned out

Possible Causes	Solution Methods
Incorrect voltage/frequency	Check the coil specifications. If necessary, replace with a suitable type of coil. Check the wiring diagram and voltage changes.
Coil short circuit	Check if other installed parts may be short-circuited. Check the connection of the coil and replace it if any errors are found. Pay attention to the installation of the coil and ensure that there is no water flow or dripping at the connection.
The plunger moves with high friction (due to dirt, damage, or bending)	Replace the damaged parts and clean the dirt.
The medium temperature is too high	Check the valve specifications. If necessary, replace the valve with a suitable model.
The ambient temperature is too high	Move the valve to a cooler environment. Check the valve specifications and increase ventilation around the coil and valve.

If your solenoid valve encounters the above-mentioned problems during use, you can refer to the corresponding troubleshooting methods. If you encounter any other issues not mentioned, you can contact us and we will do our best to assist you.