KSB Etachrom L, Installation & Operating Manual

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8 Trouble-shooting
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Etachrom L
1212.8/19-EN
A B C D E F G H Possible cause Remedy
13)
- - - - -
✘
- - Use of unsuitable shaft seal materials Change the material combination.
14)
- ✘ ✘ - - - - - Speed is too high. Reduce speed.
14)
- - - - ✘ - - - Tie bolts/sealing element defective Fit new seal between volute casing and
discharge cover.
Re-tighten the bolts.
- - - - - ✘ - - Worn shaft seal Fit new shaft seal.
✘ - - - - ✘ - - Score marks or roughness on shaft sleeve Fit new shaft sleeve. Fit new shaft seal, if
required.
- - - - - ✘ - - 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 piping connections and secure fixing of
pump. Reduce distances between pipe clamps.
Fasten the pipes using anti-vibration material.
- - -
✘
- - - - Increased axial thrust
14)
Clean balancing holes in the impeller.
Replace the casing wear rings.
- - - ✘ - - - - 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 2 phases only. Replace the defective fuse.
Check the electric cable connections.
- - - - - -
✘
- 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.