EBARA GS - Motor Fault Diagnosis

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2. Motor
Fault
Causes
Measures to be taken
It does not work
- The winding is broken or has been cut.
- Stator short-circuited.
- The bearings are blocked.
- The voltage is low.
- Lack of phases in the power supply.
- Repair in specialist workshop.
- Repair in specialist workshop.
- Repair the bearings.
- Change the nominal voltage.
- Check the power supply.
Abnormal noise or
excessive vibrations.
- Operation without a phase
- Power surges.
- Friction between the rotor and stator.
- Obstructions in the cooling fan.
- Fault in installing the motor.
- Poor Star/Delta commutation.
- Check the power supply.
- Correct the power surges.
- Align and/or replace the bearing.
- Remove foreign bodies.
- Connect the pump correctly.
- Correct the cabling.
Motor overheating.
Appearance of smoke
and/or bad smell
- High power surges.
- Fan is blocked.
- Wrong voltage.
- The bearings are blocked.
- Stator short-circuited.
- Stator earthed.
- Correct the power surges.
- Release the fan.
- Change the motor for one with the
appropriate voltage.
- Repair the bearings.
- Repair in specialist workshop.
- Repair in specialist workshop.
Low rotation speed
- Low voltage.
- Poor Star/Delta commutation.
- Overloading.
- Defective electrical connection.
- Change the nominal voltage.
- Correct the cabling.
- Reduce the current.
- Correct the electrical connections.