Amarex KRT series - Troubleshooting; Fault Identification and Remedies

8 Trouble-shooting
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Amarex KRT
8 Trouble-shooting
WARNING
Improper remedial work
Risk of personal injury!
▷ For any work performed in order to remedy faults observe the relevant
information given in this operating manual and/or the product literature
provided by the accessories manufacturers.
If problems occur that are not described in the following table, consultation with
KSB’s customer 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53: Trouble-shooting
A B C D E Possible cause Remedy
- ✘ - - - Pump delivers against an excessively high
discharge pressure.
Re-adjust to duty point.
- ✘ - - - Valve in discharge pipe not fully open Open gate valve completely
- - ✘ - ✘ Pump is running in the off-design range (part
load/overload).
Check operating data of the pump
✘ - - - - Pump or piping are not completely vented. Dry installation:
Vent and/or prime the pump and piping; fit a vent
valve if required.
Wet installation:
Vent by lifting the pump off the base elbow and
lowering it again.
✘ ✘ - ✘ ✘ Wet installation:
Pump intake clogged by deposits
Clean inlet, pump parts and lift check valve
Dry installation:
Inlet line clogged by deposits
Clean the intake or inlet line, pump components
and lift check valve.
- - ✘ - ✘ Dirt/fibers in the clearance between the
casing wall and impeller; sluggish rotor.
Check whether the impeller can be easily rotated.
Clean the impeller, if required.
- ✘ ✘ ✘ ✘ Wear Replace worn parts by new ones.
✘ ✘ - ✘ - Defective riser (pipe and sealing elements) Replace defective riser pipes.
Replace sealing elements.
- ✘ - ✘ ✘ Impermissible air or gas content in the fluid
handled
Contact KSB.
- - - - ✘ System-induced vibrations Contact KSB.
- ✘ ✘ ✘ ✘ Wrong direction of rotation Check the connection of the motor and control
system, if any.
- ✘ - ✘ - Wrong supply voltage Check the power cable.
Check the cable connections.
✘ - - - - No voltage Check the electrical installation.
Contact the energy supplier.
- - - - ✘ Worn or defective rolling element bearings Contact KSB.
✘ - - - - Defective motor winding Contact KSB.
- ✘ - - - Wet installation:
Water level lowered too much during
operation
Check level control equipment.