8 Trouble-shooting
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KSB IE3-Motor
8 Trouble-shooting
WARNING
Improper work to remedy faults
Risk of injury!
▷ For any work performed to remedy faults, observe the relevant information
given in this operating manual and/or in the product literature provided by the
accessories manufacturer.
If problems occur that are not described in the following table, consultation with the
KSB customer service is required.
A
Drive does not start.
B
Rumbling noise during start-up
C
Rubbing noises
D
Radial vibrations
E
Axial vibrations
F
Wrong direction of rotation
Table18: Trouble-shooting
A B C D E F Possible cause Remedy
✘ - - - - - No voltage Check mains fuses, mains voltage and
operating status of the frequency inverter.
✘ - - - - - Mains cables connected incorrectly/
Fault in supply line
Check wiring.
✘ ✘ - - - - Driven machine is blocked Manually clear the blockage from the driven
machine, observing the operating manual of
the driven machine!
- - ✘ - - - Bearings defective Check bearings and replace if necessary.
- - ✘ - - - Rubbing contact between rotor and stator Check bearings and replace if necessary.
Check rotor and replace if necessary.
- - - ✘ - - Rotor unbalance Check key convention applicable to the shaft
and output element; remove rotor and re-
balance if required.
- - - ✘ - - Improper installation Check the foundation, the place of installation
and the mounting surface.
- - - - ✘ - Incorrect connection of pump/load Check correct alignment between motor and
driven machine, check coupling.
- - - - - ✘ Wrong direction of rotation setting Change the direction of rotation by altering
the parameters of the frequency inverter or
interchanging two phase conductors.
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