Omega
38
Trouble--shooting Table
Pump pressure too low
Pump pressure too high
Flow rate too high
Flow rate too low
Power consumption too high
Pump fails to pump liquid after being switched on
Pump ceases to pump liquid
Pump does not run smoothly (noise, vibrations)
Inadmissible temperature increase at pump /
seal casing
Bearing temperature too high
Exessive leakage at shaft seal
Drive overloaded
Leakage at pump
Cause Remedy
1
)
F F
Gland cover, seal cover
tightened incorrectly,
wrong packing material
Alter
Replace
Correct
Replace gland packing
Replace worn components
F F
Lack of cooling liquid or
cooling liquid chamber con-
taminated
Check flushing / sealing liquid pressure
Clean sealing liquid line, possibly introduce
sealing liquid from an external source or
increase its pressure
Increase cooling liquid flow
Clean cooling liquid line.
F F
Pump mis --aligned or reso-
nance vibrations in the pi-
ping
Re-- align pump / drive
Check piping connections and pump
mounting, if necessary, improve mounting
of piping
Apply vibration--damping measures
F
Excessive axial thrust Check duty point / pump selection
Check mode of operation
Check suction -- side flow.
F
Too little, too much or un-
suitable lubricant
Clean bearing
Replace lubricant
Top up, reduce or change lubricant
F F F F
Motor is running on two
phases only
Replace defective fuses
Check electrical connections
Check switchgear.
F F F
Rotor is out of balance Clean rotor
Check run--out, straighten if necessary
Re-- balance rotor.
F F F
Bearings damaged Replace / change
F F
Flow rate too low Re--adjust operating point
Fully open shut--off valve in the intake pipe
Fully open shut--off valve in the discharge
pipe
Recalculate or measure the hydraulic los-
ses H
V
.
1
) Consult KSB
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