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8 Trouble-shooting
66 of 92
ILN / ILNC / ILNR
5211.8/08-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
Insufficient flow rate or pressure
C
Excessive current/power input
D
Vibrations and noise during pump operation
E
Increased bearing temperature
F
Excessive leakage at the shaft seal
G
Premature wear of wear rings
H
Automatic priming system is not priming.
14)
I
Main pump is not priming.
14)
J
Automatic priming system is priming but does not stop.
14)
Table 26:
Trouble-shooting
A B C D E
F G H
I
J Possible cause
Remedy
✘ ✘
-
-
-
-
-
-
-
- Suction-side / discharge-side shut-off
element closed or set incorrectly
Open the suction-side shut-off element
Partially close the discharge-side shut-
off element to comply with the duty
point.
✘
-
-
-
-
-
-
✘
-
- Wrong direction of rotation
Check the electrical connection of the
motor.
✘
-
-
-
-
-
-
✘ ✘
- Air ingress through suction line, check
valve in discharge line or at another
point between check valve and
discharge line
Check tightness of piping.
Check tightness of check valve.
✘
-
-
-
-
-
-
-
-
- Pump or suction line are not completely
vented or primed.
15)
Adjust the piping, so the vent
connections are positioned at the
highest point of the piping.
✘
-
-
-
-
-
-
-
-
- Discharge head too low
Increase speed.
Have the selection of pump or impeller
checked.
-
✘
-
-
-
-
-
-
-
- Incorrect speed
Measure the speed.
Check the supply voltage of the motor.
-
✘
-
-
-
-
-
-
-
- Pump or pipelines are not completely
vented or primed.
Prime and vent the pump as per the
instructions. (
-
✘
-
-
-
-
-
✘ ✘
- Air enters through the sealing system.
Check the sealing system.
Check the sealing elements.
-
✘
-
✘
-
-
✘
-
-
- Impeller
Re-balance the impeller.
Replace the impeller.
-
✘
-
✘
-
-
-
-
-
- Wear rings worn or fitted incorrectly.
Replace the wear rings.
14
Only for versions with automatic priming system
15
Only for versions without automatic priming system
Содержание ILN
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