KSB Etaprime L, Installation & Operating Manual

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8 Trouble-shooting
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Etaprime L
A B C D E F G H Possible cause Remedy 15)
- ✘ - - - - - - Density or viscosity of fluid handled
higher than stated in purchase order
Contact the manufacturer.
- - - - - ✘ - - Use of unsuitable shaft seal materials Change the material combination.
16)
-
✘ ✘
- - - - - Speed is too high. Reduce speed.
16)
- - - - ✘ - - - Tie bolts/sealing element defective Fit new sealing element between pump casing
and casing cover / discharge cover.
Re-tighten the bolts.
- - - - - ✘ - - Worn shaft seal Fit new shaft seal.
Check flushing liquid/barrier fluid.
✘ - - - - ✘ - - Score marks or roughness on shaft sleeve Fit new shaft sleeve.
Fit new shaft seal.
- - - - - ✘ - - Dismantle to find out. Correct.
Fit new shaft seal, if required.
- - - - -
✘
- - Vibrations during pump operation Correct the suction conditions.
Re-align the pump set.
Re-balance the impeller.
Increase pressure at the pump suction nozzle.
- - - ✘ - ✘ ✘ - Pump set is misaligned. Re-align pump set.
- - - ✘ - ✘ ✘ - 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 the 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 the voltage.
- - - - - - ✘ - Rotor out of balance Clean the impeller.
Re-balance the impeller.
- - - - - - ✘ - Defective bearing(s) Replace.
- - -
✘
- -
✘ ✘
Flow rate is too low. Increase the minimum flow rate.
- - - - - ✘ - - Incorrect inflow of circulation liquid Increase the free cross-section.