The reason why your oil purifier alarms

Common alarm causes and treatment methods of oil purifiers

1. Vacuum alarm (vacuum oil purifier)

- Possible causes:

- Vacuum pump failure (low oil level, oil quality deterioration, pump body wear).

- Vacuum pipeline leakage (seal ring aging, valve not closed tightly).

- Vacuum sensor failure or false alarm.

- Treatment method:

- Check and replenish vacuum pump oil, and ｒｅｐｌａｃｅ if necessary.

- Use soapy water to detect leaks and ｒｅｐｌａｃｅ damaged seals.

- Calibrate or ｒｅｐｌａｃｅ the vacuum sensor.

2. Oil temperature is too high/too low alarm

- Possible causes:

- Heater failure (heating tube burns out, thermostat fails).

- Cooling system abnormality (poor heat dissipation, cooling fan stops).

- Temperature sensor damage or signal interference.

- Treatment method:

- Check the resistance of the heating tube and ｒｅｐｌａｃｅ damaged parts.

- Clean the heat sink and ensure good ventilation.

- Recalibrate or ｒｅｐｌａｃｅ the temperature sensor.

3. Abnormal oil level alarm (high/low level)

- Possible causes:

- Unbalanced inlet/outlet flow (valve failure, decreased pump efficiency).

- Dirty or faulty liquid level sensor.

- Excessive oil foam (demulsification failure).

- Treatment method:

- Adjust the oil inlet valve to ensure flow matching.

- Clean or ｒｅｐｌａｃｅ the liquid level sensor.

- Add defoaming agent or reduce the vacuum to reduce foam.

4. High-pressure alarm (filter element blockage)

- Possible causes:

- The filter element has reached its service life (pressure difference exceeds the standard).

- The oil viscosity is too high or solidified at low temperatures.

- Pressure sensor failure.

- Treatment method:

- ｒｅｐｌａｃｅ the filter element (observe the pressure difference gauge ≥0.3MPa and ｒｅｐｌａｃｅ it).

- Preheat the oil or ｒｅｐｌａｃｅ it with low-viscosity oil.

- Check the pressure sensor circuit and calibration.

5. Motor overload alarm

- Possible causes:

- Mechanical jam (pump bearing damage, filter element seriously clogged).

- Unstable voltage or phase loss.

- The setting value of the thermal relay is too low.

- Treatment method:

- Manually turn the gear to check if it is stuck and ｒｅｐｌａｃｅ damaged parts.

- Detect three-phase voltage and repair power supply problems.

- Adjust the thermal relay protection threshold.

6. Water content over-limit alarm (online monitoring type)

- Possible causes:

- Decreased dehydration efficiency (insufficient vacuum, low heating temperature).

- The water sensor is contaminated or has failed.

- Serious oil emulsification (pretreatment required).

- Treatment method:

- Check the vacuum system and heating unit.

- Clean or ｒｅｐｌａｃｅ the moisture sensor (such as a Karl Fischer probe).

- Centrifuge the emulsified water first, then enter the oil purifier.

Daily maintenance suggestions

- Regularly check: vacuum pump oil, filter element, seal.

- Parameter recording: vacuum, temperature, pressure trends, and predict faults.

- Alarm reset: manually reset after troubleshooting to avoid misoperation.