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Pump doesn‘t
prime
Pump leaks Flow rate is too weak Pump is noisy
Pump/motor
doesn‘t start
Motor is noisy Reason Solution
XX
Leakage in inlet pipe
Check the inlet pipe for
leakage
XX
Lid is leaky Eliminate the leak
X
Mechanical seal is leaky
Replace it (to be done by
an expert)
XX
Excessive suction height Reduce suction height
X
No water in pump casing Fill pump casing with water
X
Suction line not below
water level
Lower the suction line
XX
Strainer is clogged Clean the strainer
XX
Dia. of suction line too
small
Use a suction line with
larger dia.
X
Suction and pressure line
clogged
Clean suction and pressure
line
XX
Foreign object in the pump
Check and clean pump,
strainer and impeller
X
Power supply interrupted
Check power supply and
fuses
X
Defective condenser Replace condenser
X
Defective bearing Replace bearings
XX
Pump is blocked
(due to sand)
Stop power supply
and make sure pump
turns freely, by using a
screwdriver *)
*) The cause of the malfunction is to be determined by an expert.
Malfunctions / Trouble shooting
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