8 Trouble-shooting
54 of 72
Amarex N
8 Trouble-shooting
A
Pump is running, but does not deliver
B
Pump delivers insufficient flow rate
C
Excessive current/power consumption
D
Insufficient discharge head
E
Vibrations and noise during pump operation
Table 25:
Trouble-shooting
A B C D E Possible cause
Remedy
X
Pump delivers against an excessively high
pressure.
Re-adjust to duty point.
X
Gate valve in the discharge line is not fully
open.
Fully open the gate valve.
X
X
Pump is running in the off-design range (low
flow/overload).
Check the pump's operating data.
X
Pump or piping are not completely vented.
Vent by lifting the pump off the duckfoot bend
and lowering it again.
X
Pump intake clogged by deposits
Clean the intake, pump components and non-
return valve.
X
X X
Suction line or impeller clogged.
Remove deposits in the pump and/or piping.
X
X
Dirt/fibres in the clearance between the
casing wall and impeller; sluggish rotor
Check whether the impeller can be easily
rotated.
Clean the impeller, if required.
X X X X
Wear of internal parts
Replace worn parts by new ones.
X X
X
Defective riser (pipe and sealing elements)
Replace defective riser pipes,
replace sealing elements.
X
X X
Impermissible air or gas content in the fluid
handled
Contact KSB.
X
System-induced vibrations
Contact KSB.
X X X X
Wrong direction of rotation
Check the connection of the motor and
switchgear, if any.
X
Wrong supply voltage
Check the power cable.
Check the cable connections.
X
Motor is not running because of lack of
voltage.
Check the electrical installation.
Contact the energy supplier.
X
X
Motor winding or power cable are defective.
Replace by new original KSB parts or contact
KSB.
X
Defective rolling element bearing
Contact KSB.
X
Water level lowered too much during
operation.
Check level control equipment.
X
The temperature control device for
monitoring the winding has tripped due to
excessive winding temperature.
The motor will restart automatically once it has
cooled down.
X
Temperature limiter (explosion protection)
has tripped the pump as a result of the
permissible winding temperature being
exceeded.
Have cause determined and eliminated by
qualified and trained personnel.
X
Motor has been tripped by leakage monitor.
Have cause determined and eliminated by
qualified and trained personnel.
Summary of Contents for Amarex N
Page 62: ...9 Related Documents 62 of 72 Amarex N 9 2 2 Version ULG Fig 33 Wiring diagram for version ULG...
Page 70: ......
Page 71: ......
