Etanorm sya, 8trouble-shooting – B&C Technologies IM Series Industrial Ironer User Manual
Page 116
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Etanorm SYA
17
8
Trouble-shooting
Cause
Remedy
1)
*
Pump delivers against an excessively high discharge
pressure.
Re-adjust duty point.
*
Excessively high back pressure.
Check plant for impurities.
Fit a larger impeller.
2)
Increase the speed (turbine, I.C. engine)
*
* *
Pump or piping are not completely vented or primed.
Vent and/or prime.
Clean vent hole.
*
Supply line or impeller clogged.
Remove deposits in the pump and/or piping.
*
Formation of air pockets in the piping.
Alter piping layout.
Fit a vent valve.
*
* *
NPSH
available
(positive suction head) is too low.
Check/alter liquid level.
Install pump at a lower level.
Fully open shut-off valve in the suction line.
Change suction line, if the friction losses in the suction line
are too high.
Check any strainers installed.
Observe permissible rate of pressure fall.
*
Reverse rotation.
Interchange two of the phases of the power supply cable.
*
Speed is too low.
Increase speed.
2)
*
*
Wear of internal pump parts.
Replace worn components by new ones.
* *
*
Pump back pressure is lower than specified in the pur-
chase order.
Adjust duty point accurately.
In case of persistent overloading, turn down impeller, if nec-
essary.
2)
.
*
Density or viscosity of the fluid pumped is higher than
stated in the purchase order.
2)
* *
Speed is too high.
Reduce speed.
2)
*
Defective gasket.
Replace the gasket between the volute casing and the dis-
charge cover.
*
Worn shaft seal.
Fit new shaft seal.
*
* *
The unit is misaligned.
Re-align.
*
* *
Pump is warped or sympathetic vibrations in piping.
Check pipeline connections and secure fixing of pump; if re-
quired, reduce the distances between the pipe clamps.
Fix the pipelines using anti-vibration material.
*
Increased axial thrust.
2)
Clean the 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 distance according to the installation plan.
* *
Motor is running on two phases only.
Replace the defective fuse.
Check the electric cable connections.
*
Rotor is out of balance.
Clean the impeller. / Re-balance the impeller.
*
Defective bearings.
Fit new bearings.
* *
Insufficient rate of flow.
Increase the minimum rate of flow.
1) The pump pressure must be released before attempting to remedy faults on parts which are subjected to pressure.
2) Contact KSB.
106