KSB Filtra 22 D [29/36] Warning
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KSB Filtra 22 D [29/36] Warning

KSB Filtra 18 D [29/36] Warning
8 Trouble-shooting
29 of 36
Filtra N
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 instruction 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.
Table7: Trouble-shooting
Problem Possible cause Remedy
1)
Motor does not start. Motor protection switch defective or
not calibrated properly
Check.
Correct mains voltage but insufficient
voltage at the motor terminals
Replace the power cable of the pump
set; make sure core cross-sections are
large enough.
Incorrect motor connection Observe the wiring diagram.
Pump does not prime. Suction lift is too high. Reduce the suction lift.
Pump casing and suction line not filled
completely
Fill completely.
Air ingress at the transparent lid Check that the joint ring is fitted
properly and provides tight sealing.
Air ingress at the suction line Check that the suction line is sealed
properly and has been laid with a
continuously falling slope (to prevent air
pocket formation).
Wrong direction of rotation (3-phase
motor)
Check electrical connections.
Discharge-side and suction-side shut-off
elements fully or partly closed
Fully open the shut-off elements.
Specified performance data are
not achieved.
Wrong direction of rotation (3-phase
motor)
Check electrical connections.
Total head smaller than expected Use pump set with larger head/flow rate
or reduce head losses.
Filter fully or partly clogged Clean the filter basket
Excessive pressure losses in the piping Reduce head losses (use pipelines with
larger diameters, reduce the number of
pipe elbows).
Air ingress on the suction side Check the suction line for tightness.
Mechanical seal leakage Defective mechanical seal Check all parts of the mechanical seal;
replace them if required.
Motor protection device has
tripped
Pump blocked Check whether the pump can be rotated
by hand.
Pump not running Check that the room is sufficiently
vented.
Motor is running on two phases only
(three-phase motor)
Check electrical connections.
Wrong direction of rotation (3-phase
motor)
Check electrical connections.
Impermissible voltage drop Increase the voltage or increase the
conductor cross-section.
1) Pump pressure must be released before attempting to remedy faults on parts which are subjected to pressure. Disconnect
the pump from the power supply and let it to cool down.

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