8 Trouble-shooting
90 of 108
Magnochem
A B C D E F G Possible cause Remedy
15)
- ✘ ✘ - - - - Speed is too high. Reduce speed (turbine, I.C. engine).
16)
17)
✘ - - - - ✘ - Wear of internal components Replace worn components by new ones.
- - - - ✘ - - Use of unsuitable materials Change the material combination.
- - - - ✘ - - Connection bolts and screw plugs have
loosened.
Re-tighten.
Fit new sealing elements.
- - - - - - ✘ Lack of cooling liquid or dirty cooling
chamber
Increase cooling liquid quantity.
Clean out cooling chamber.
Purify/clean cooling liquid.
- - - - ✘ - - Dismantle to find out. Repair necessary.
- - - ✘ - ✘ - The pump set is misaligned. Check the coupling alignment; re-align the
coupling, if required.
- ✘ - ✘ - ✘ - Pump is warped or sympathetic vibrations in
the piping.
Check the piping connections and secure
fixing of pump; if required, reduce distances
between the pipe clamps.
Fix the pipelines using anti-vibration material.
- - - ✘ - - - Insufficient or excessive quantity of
lubricant or unsuitable lubricant
Top up, reduce or change lubricant.
- - - ✘ - - - Non-compliance with specified coupling
distance
Correct distance according to general
arrangement drawing.
✘ ✘ - - - - - Motor is running on two phases only. Replace the defective fuse.
Check the electric cable connections.
- ✘ - - - - - Operating voltage is too low. Increase voltage; check voltage drop in the
power cable.
- - - - - ✘ - Impeller is out of balance. Clean the impeller.
Re-balance the impeller.
- ✘ - - - ✘ - Defective bearing(s) Replace.
- - - - - ✘ ✘ Flow rate is too low. Increase the minimum flow rate.
✘ - - - - ✘ ✘ Magnetic coupling has dropped out of
synchronisation with motor.
Switch off the motor and re-start.
Check motor starting.
- - ✘ - - - - System pressure is too high. Check system.
- - - ✘ - - - No cooling air flow from the motor to the
rolling element bearing
Check system.
- - - - ✘ - - Defective shroud Repair necessary.
- - - ✘ - ✘ - Magnetic coupling out of balance (inner
and outer rotor)
Check balancing.
- - - - - - ✘ Cooling circuit of magnetic coupling
interrupted
Repair necessary.
17) The fault can also be remedied by changing the impeller diameter.
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