Common troubleshooting methods for oil filter

Common faults and solutions for oil filter machines

1. Poor filtering effect (there are still impurities/water in the oil)

- Causes: filter element blockage, insufficient vacuum (vacuum oil filter), oil temperature is too low (affecting dehydration).

- Treatment:

- ｒｅｐｌａｃｅ or clean the filter element (check whether the pressure difference exceeds the standard).

- Check the oil level and sealing of the vacuum pump (the vacuum oil filter needs to maintain ≤50Pa).

- Adjust the heating temperature to 60-65℃ (but not more than 70℃).

2. Insufficient vacuum (vacuum oil filter)

- Causes: vacuum pump failure, pipeline leakage, aging of the vacuum tank sealing ring.

- Treatment:

- ｒｅｐｌａｃｅ the vacuum pump oil or inspect the pump body.

- Use soapy water to detect pipeline leakage points and tighten them.

- ｒｅｐｌａｃｅ the sealing ring or O-ring.

3. The oil pump is noisy or does not produce oil

- Causes: oil inlet pipe blockage, oil pump air intake, motor failure.

- Treatment:

- Clean the oil inlet filter or pipe.

- Exhaust the air in the pump (check if the shaft seal is leaking).

- Test the motor voltage/current and ｒｅｐｌａｃｅ if necessary.

4. Heating system abnormality

- Cause: Heating tube damage, thermostat failure, thermal relay tripping.

- Treatment:

- Use a multimeter to detect the resistance of the heating tube and ｒｅｐｌａｃｅ the damaged parts.

- Calibrate or ｒｅｐｌａｃｅ the thermostat.

- Reset the thermal relay and check if it is overloaded.

5. Oil leakage (oil sprays out from the exhaust port)

- Cause: The oil level is too high, there is too much foam in the vacuum tank, and the demulsification fails.

- Treatment:

- Reduce the oil inlet flow rate and control the oil level to the center line of the window.

- Add defoaming agent or stop the machine for defoaming.

6. Electrical control system failure

- Cause: Contactor contact burnout, PLC module failure, sensor failure.

- Treatment:

- Clean or ｒｅｐｌａｃｅ the contactor contacts.

- Restart the PLC or contact the manufacturer to fix the program error.

Daily maintenance suggestions:

- Regularly ｒｅｐｌａｃｅ the filter element, vacuum pump oil and seals.

- Check the pipeline sealing before operation to avoid a no-load operation.

- Record the operating parameters (vacuum, temperature, pressure) to warn of faults in advance.