KSB SuPreme Series, Installation & Operating Manual

Page: 41 / 52

8 Troubleshooting
41 of 52
KSB SuPremE
A B C D E F G H I Possible cause Remedy
- - - ✘ ✘ - - - - Drive overload Lower the power input by reducing
rotational speed, then check the drive/
pump/load for blockage.
- - - - ✘ - - - - Temperature of power electronics or
motor winding too high (particularly at
high torque and low speed)
Reduce the ambient temperature by
improving ventilation.
Improve cooling by cleaning the cooling
fins.
Ensure the intake opening for the motor
fan is not blocked.
Ensure that the motor fan is working
properly.
Reduce the power input by changing the
operating point (system-specific).
Check the permissible load and, if
necessary, use external cooling.
- - - - -
✘
- - - Damage to the bearings 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.