8 Trouble-shooting
52 of 64
Etaline
A B C D E F G H Possible cause Remedy
7)
- ✘ ✘ - - - - - Speed too high Reduce speed.
7)
- - - - ✘ - - - Tie bolts/sealing element defective Fit new sealing element between volute
casing and casing 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.
- - - - - ✘ - - Dismantle to find out. Correct.
Fit new shaft seal, if required.
- - - - - ✘ - - Vibrations during pump operation Correct the suction conditions.
Re-balance the impeller.
Increase pressure at the pump suction nozzle.
- - - ✘ - ✘ ✘ - 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.
- - - ✘ - - - - Increased axial thrust 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.
✘ ✘ - - - - - - Motor is running on two phases only. Replace the defective fuse.
Check the electric cable connections.
Check the motor winding.
- - - - - - ✘ - 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 setting of motor protection
switch
Check setting.
Fit new motor protection switch.
- ✘ ✘ - - - - - Transport lock has not been removed
from the shaft groove.
Remove.
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