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8 Trouble-shooting
82 of 126
Amacan S
1589.837/01-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 is running, but does not deliver
B
Pump delivers insufficient flow rate
C
Excessive current/power input
D
Insufficient discharge head
E
Vibrations and noise during pump operation
Table 31:
Trouble-shooting
A B C D E Possible causes
Remedy
7)
-
✘
-
-
✘
Water level lowered too much during operation Check supply and capacity of system (sump floor
area).
Check level control equipment.
✘ ✘
-
-
✘
Total pressure corresponding to NPSH
pump
too
high
Total pressure corresponding to NPSH
system
too
low
Increase fluid level on the suction side.
Clean screening equipment, if required.
✘ ✘ ✘
-
✘
Penetration of air into the pump due to
formation of an air pocket
- Suction-side water level too low
Increase the suction-side water level. If this is
not possible or unsuccessful, please contact KSB.
✘ ✘ ✘
-
✘
Unfavourable flow to the pump inlet
Improve the flow to the intake chamber (contact
KSB).
-
✘ ✘
-
✘
Pump running in off-design conditions
- part load/overload
Check the pump's operating data.
✘ ✘
-
✘ ✘
Pump clogged by deposits
Clean intake and pump components.
-
✘ ✘ ✘ ✘
Wear
Replace worn parts.
-
✘
-
✘ ✘
Impermissible air or gas content in the fluid
handled
Contact KSB.
-
-
-
-
✘
System-induced vibrations
Contact KSB.
-
-
✘
-
✘
Wrong direction of rotation
Check the electrical connection of motor and
control system, if any.
✘
-
-
-
- No voltage
Check electrical connections.
Contact the energy supplier.
✘
-
-
-
- Motor winding or electric cable are defective.
Replace with original KSB cable or contact KSB.
-
-
✘
-
✘
Worn or defective rolling element bearings
Contact KSB.
✘
-
-
-
- The thermistor tripping unit with manual reset
for temperature limiter has tripped the pump as
a result of the permissible winding temperature
being exceeded.
Have cause determined and eliminated by
qualified and trained personnel.
✘
-
-
-
- Motor has been tripped
by leakage monitor.
Have cause determined and eliminated by
qualified and trained personnel.
✘
-
-
-
- Mechanical seal monitor has tripped.
Have cause determined and eliminated by
qualified and trained personnel.
7
The pump pressure must be released before attempting to remedy faults on parts which are subjected to
pressure. Disconnect the pump set from the power supply!