EBARA GS Instruction And Maintenance Manual page 21

Instruction and Maintenance Manual
Power surge
The bearings are
overheating.
Excessive operating
vibration and noise.
- The voltage is low or the
imbalance between the
phases is high.
- The flow rate is too low or
the head is too high.
- 50 Hz pump is being used
at 60 Hz.
- Foreign bodies inside the
pump.
- The mechanical seal was
not fitted correctly.
- Bearings damaged.
- Friction in the rotation
areas. The shaft is bent.
- The direction of rotation is
not correct.
- The density and/or viscosity
level of the liquid is high.
- Bearings damaged.
- In operation for a long time
with the valve closed or
half-closed.
- Fault in installation.
- Bearings damaged.
- Flow rate too high.
- Flow rate too low.
- Impeller is blocked.
- The direction of rotation is
not correct.
- Friction in the rotation
areas. The shaft is bent.
- Cavitation.
- Vibrations in the piping.
- Check the power supply.
- Partially shut off the delivery
valve.
- Check the nameplate
details.
- Remove foreign bodies.
- Fit it correctly.
- Replace the bearings.
- Repair in specialist
workshop.
- Check and correct the
connection.
- Review the project.
- Replace the bearings.
- Avoid such a situation;
close the valve or stop the
pump.
- Check installation.
- Replace the bearings.
- Reduce the aperture of the
delivery valve.
- Increase the aperture of the
delivery valve.
- Remove foreign bodies.
- Check and correct the
connection.
- Repair in specialist
workshop.
- Seek expert advice.
- Replace the piping or fit an
inverter.
EN
21