9 Trouble-shooting
62 of 104
mini-Compacta
2317.886/16-EN
9 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 instruction manual and/or in the product literature provided by the
accessories manufacturer.
NOTE
Please contact KSB Service before carrying out any work on the pump's internal
parts during the warranty period. Non-compliance will lead to forfeiture of
warranty cover and of any and all rights to claims for damages.
If problems occur that are not described in the following table, consultation with KSB
Service is required.
A
Pump is running, but does not deliver
B
Insufficient discharge head
C
Excessive current/power input
D
Insufficient discharge head
E
Vibrations and noise during pump operation
F
Lifting unit frequently switches to fault mode
Table 33:
Trouble-shooting
A B C D E
F Possible cause
Remedy
7)
-
✘ ✘
-
-
✘
Pump delivers against an excessively high
pressure.
Lifting unit is too small for the prevailing
operating conditions.
-
✘
-
-
-
✘
Gate valve in the discharge line is not fully
open.
Fully open the gate valve.
-
-
✘
-
✘ ✘
Pump is running in the off-design range.
Check the pump's operating data.
✘
-
-
-
-
✘
Pump or piping are not completely vented.
Check the vent lines of lifting unit/pumps.
✘ ✘
-
-
-
✘
Pump intake clogged by deposits
Clean the intake, pump components and
collecting tank.
-
✘
-
✘ ✘ ✘
Inlet lines or impeller clogged
Remove deposits in the pump and/or piping.
-
-
✘
-
✘ ✘
Dirt/fibres in the clearance between the
casing wall and impeller
Sluggish rotor.
Check whether the impeller can be easily
rotated; clean the hydraulic system if required.
-
✘ ✘ ✘ ✘ ✘
Wear of internal components
Replace worn components by new ones.
-
✘
-
✘ ✘ ✘
Impermissible air or gas content in the fluid
handled
Contact the manufacturer.
-
-
✘
-
-
- Operating voltage is too low.
Check mains voltage;
check electrical cable connections
✘
-
-
-
-
- Motor is not running because of lack of
voltage.
Check electrical installation (and fuses).
-
✘ ✘ ✘ ✘ ✘
Wrong direction of rotation (three-phase
units)
Reverse two phases of mains power cable or
motor power cable. (
✘ ✘
-
✘
-
✘
Motor is running on two phases only (three-
phase units).
Check conductor voltages.
If necessary, replace defective fuse.
Check cable connections.
✘
-
-
-
-
✘
Manual-0-automatic selector switch set to
"0".
Set manual-0-automatic selector switch to
"Automatic".
7)
The pump pressure must be released before attempting to remedy faults on parts which are subjected to pressure.
Disconnect the pump from the power supply!
