KSB HPK Series User Manual

8 Trouble-shooting
68 of 80
HPK
1121.8/06-EN
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 service is required.
A Pump delivers insufficient flow rate
B Motor is overloaded
C Excessive discharge pressure
D Increased bearing temperature
E Leakage at the pump
F Excessive leakage at the shaft seal
G Vibrations during pump operation
H Impermissible temperature increase in the pump
Table31: Trouble-shooting
A B C D E F G H Possible cause
Remedy
18)
✘ - - - - - - - Pump delivers against an excessively
high pressure.
Re-adjust to duty point.
Check system for impurities.
Fit a larger impeller.
19)
Increase the speed (turbine, I.C. engine).
✘ - - - - - ✘ ✘ Pump or piping are not completely
vented or primed.
Vent and/or prime.
✘ - - - - - - - Supply line or impeller clogged Remove deposits in the pump and/or piping.
✘ - - - - - - - Formation of air pockets in the piping Alter piping layout.
Fit vent valve.
✘ - - - - - ✘ ✘ Suction lift is too high/NPSH
available
(positive suction head) is too low.
Check/alter fluid level.
Install pump at a lower level.
Fully open the shut-off element in the suction
line.
Change suction line, if the friction losses in
the suction line are too high.
Check any strainers installed/suction opening.
Observe permissible speed of pressure fall.
✘ - - - - - - - Air intake at the shaft seal Clean barrier fluid duct, supply external
barrier fluid, if necessary, or increase barrier
fluid pressure.
Replace shaft seal.
✘ - - - - - - - Wrong direction of rotation Check the electrical connection of the motor
and the control system, if any.
✘ - - - - - - -
Speed is too low.
19)
- Operation with frequency inverter
- Operation without frequency inverter
- Increase voltage/frequency at the frequency
inverter in the permissible range.
- Check voltage.
✘ - - - - - ✘ - Impeller Replace worn components by new ones.
18
Pump pressure must be released before attempting to remedy faults on parts which are subjected to pressure.
19
Contact KSB.

KSB HPK Series Specifications

General

Brand	KSB
Model	HPK Series
Category	Water Pump
Language	English