Trouble-Shooting - KSB UPA Installation & Operating Manual

Table 30: Trouble-shooting
A B C D E F G H Possible cause
- ✘ - - - - - - Pump delivers against an excessively high
- - ✘ - - - - - Pump delivers against an excessively low
- - ✘ ✘ - - - - Deposits in the impellers
- ✘ ✘ - - - - - Wrong direction of rotation (three-phase
- - - - - - Wear of internal components
✘ ✘
- ✘ - - ✘ - - - Two-phase operation
- - - - - - No power supply
✘ ✘
✘ - - - ✘ - - - Pump clogged by sand
✘ - - - ✘ ✘ ✘ - Motor winding or power cable are
- - - - - Defective or clogged riser (pipe and
✘ ✘ ✘
- ✘ - - - - - - Water level lowered too much during
- - - - - Impermissible air/gas content in the fluid
✘ ✘ ✘
- - - ✘ - - - - Mechanical defect of pump or motor
- - - - - - - System-induced vibrations
✘
- ✘ - ✘ - - - - NPSHavailable (positive suction head) is
26 Release pump set pressure before attempting to remedy faults on parts which are subjected to pressure.

8 Trouble-shooting

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 is running, but does not deliver
B Insufficient flow rate
C Insufficient discharge head
D Vibrations and noise during pump operation
E Overcurrent relay has tripped
F Fuses have blown
G Pump set cannot be switched on
H Pump set cannot be switched off
pressure.
pressure.
units)
defective.
sealing elements)
operation
handled
too low.
UPA / UPA S
26)
Remedy
Re-adjust to duty point by opening the
shut-off element accordingly.
Re-adjust to duty point by closing the shut-
off element accordingly.
Remove deposits.
Contact KSB.
Interchange two of the phases of the power
cable.
Replace worn parts by new ones.
Contact KSB.
Replace defective fuse.
Check cable connections.
Check electrical installation.
Inform electric utility company.
Clean suction casing, impellers, stage
casings and check valve.
Request particulars.
Contact KSB.
Replace defective pipes.
Replace sealing elements.
Contact KSB.
Contact KSB.
Contact KSB.
Contact KSB.
Submerge pump deeper.
79 of 98