One: The solenoid valve does not operate after being powered on.

Check for poor power wiring—reconnect and ensure the connections of the wiring and connectors.

2. Verify that the power voltage is within the ±operational range—adjust to the normal position range.

3. Inspect for solder joints - re-solder if necessary.

4. Coil Short Circuit – Replace the Coil.

5. Is the pressure differential not suitable? Adjust the pressure differential or replace with a suitable solenoid valve.

6. Fluid Temperature Too High – Replace with an Appropriate Solenoid Valve.

7. Impurities cause the main valve core and the moving iron core of the solenoid valve to stick—clean the valve; if there is damage to the seals, replace the seals and install a filter.

8. Excessive liquid viscosity, high frequency, and lifespan reached – replace the product.

The solenoid valve cannot be closed.

1. The main valve core or iron moving core seal has been damaged — replace the seal.

2. Is the fluid temperature and viscosity too high? Replace with the appropriate solenoid valve.

3. Impurities entering the solenoid valve cause the valve core or armature core to be cleaned.

4. Springs have reached their lifespan or are deformed—replace them.

5. Throttle hole balance hole clogging - Clean promptly.

6. Overly frequent operation or end of life—choose a new product or update the product.

Section 3: Other Circumstances

Internal Leak – Inspect for damaged seals and improperly assembled springs.

2. External Leak – Loose connection or worn seal – Tighten screws or replace the seal.

3. Noise during power-on - Tighten loose components on the head. Voltage fluctuations are out of the allowable range - adjust the voltage. Iron core mating surface has impurities or unevenness - clean or replace promptly.