9 Trouble-shooting
WARNING
Improper work to remedy faults
Risk of injury!
▷
For any work to remedy faults observe the relevant information in this manual
or in the relevant accessory manufacturer's product literature.
NOTE
Before performing any work on the pump's internal parts during the warranty
period please always consult the manufacturer. Our after-sales service will be at
your disposal. Non-compliance will lead to forfeiture of any and all rights to claims
for damages.
If problems occur that are not described in the following table, consultation with
KSB’s customer service is required.
Pump is running but does not deliver
Insufficient discharge head
Excessive current/power consumption
Insufficient discharge head
Vibrations and noise during pump operation
Lifting unit frequently switches to fault mode
Table 21: Trouble-shooting
A B C D E F Possible cause
Remedy
5)
-
✘ ✘
-
-
✘
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 KSB.
-
-
✘
-
-
- 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 power cable or motor
supply 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".
✘
-
-
-
-
✘
Motor winding or electric cable are defective. Replace by new original KSB parts or contact
KSB.
A
B
C
D
E
F
5)
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!
9 Trouble-shooting
52 of 86
mini-Compacta
