KSB MK, Installation & Operating Manual

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8 Trouble-shooting
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MK
8 Trouble-shooting
WARNING
Improper work to remedy faults
Risk of injury!
▷ For any work performed to remedy faults, observe the relevant information
given in this operating manual and/or in the product literature provided by the
accessories manufacturer.
If problems occur that are not described in the following table, consultation with the
KSB customer service is required.
A Pump does not start up
B Motor is overloaded
Motor protection switch trips the pump
C Pump delivers insufficient flow rate
D Excessive pump flow rate
E Vibrations during pump operation
F Excessive wear on bearings
Table 14: Trouble-shooting
A B C D E F Possible cause Remedy
11)
- -
✘
- - - Wrong direction of rotation
▪
Check the electrical connection of the
pump set and the control system, if
necessary.
- ✘ ✘ - ✘ - Wear of internal components ▪ Replace worn components by new ones.
- ✘ - ✘ - - System head is lower than specified in the
purchase order.
▪ Re-adjust to duty point by means of the
shut-off valve in the discharge line.
▪
Check whether the impeller could be
turned down.
-
✘ ✘
- - - Density or viscosity of fluid handled higher
than stated in purchase order
▪
Contact the manufacturer.
-
✘
- - - - Gland follower over-tightened or cocked
▪
Tighten gland follower correctly.
- ✘ ✘ - - - Motor is running on two phases only. ▪ Check the electrical cable connections.
▪
Replace the defective fuse.
✘ - - - - - Motor is not running because of lack of
voltage.
▪ Check electrical connections.
▪
Notify the energy supply company.
- ✘ - - - - Switchgear, control unit or overcurrent relay
defective.
Check and replace, if necessary.
▪ Check and replace defective components.
- - ✘ - - - Pump delivers against an excessively high
pressure.
▪ Re-adjust to duty point.
▪ Check system for impurities.
▪ Fit larger impeller.
12)
▪
Increase the speed (turbine, I.C. engine)
- ✘ ✘ - ✘ - Supply line or impeller clogged ▪ Remove deposits in the pump and/or
piping.
- ✘ ✘ - ✘ - Insufficient inflow ▪ Check suction openings/screen of the
volute casing for dirt accumulation.
11) Pump pressure must be released before attempting to remedy faults on parts which are subjected to pressure.
12) Contact KSB.