13
Malfunctions / T
rouble shooting
* The cause of the malfunction is to be determined by an expert.
Pump doesn't
prime
Flow rate is too weak
Pump is noisy
Pump/motor doesn't st
art
Motor is noisy
Reason
Solution
Suction line is leaky
Eliminate the leak
X
X
Lid is leaky
Eliminate the leak
X
X
X
X
X
Mechanical seal is leaky
Replace it (to be done by an
expert)
No water in pump casing
Fill pump casing with water
Defective bearing
Replace bearings
*
X
X
X
X
Strainer is clogged
Empty the strainer
Suction line not below
water level
Lower the suction line
Pump above water level
Inst
all pump below water level
Use a suction line with larger
dia.
Suction and pressure line
clogged
Clean suction and pressure
line
Foreign object in
the pump
Check and clean pump, strainer
and impeller
X
X
Power supply interrupted
Check power supply and fuses
Pump is blocked
(due to sand)
Stop power supply and make
sure pump turns freely
,
by using a screwdriver
*
X
X
X
X
X
X
Pump leaks
X
Dia. of suction line
too small
Defective condenser
Replace condenser
X
