35
A.0100.301 – IM-FIP/08.00 EN (02/2014)
7.0 Trouble shooting chart
7.1 Pump
Cause Remedy
Pump is not starting
No electric power Check/replace the fuse. Check that the
electric system is not overloaded.
Low voltage Check that the wiring is not too long and that
it has the right dimension.
Unsufficient starting torque of motor Check starting torque required, change the
motor if necessary
Unnormal swelling of the impeller Change the impeller. Contact your supplier
for suitable impeller material.
Pump is not priming
Wrong rotation of the pump Reverse rotation
Loose front cover screws Tighten the screws according to section
2.9 Tightening torque for cap screws.
Torn front cover gasket Replace
Blocked inlet/outlet pipes Flush and clean pipings and connections.
Open all valves
Suction lift too high Fill suction pipe/reduce suction lift
Motor speed too low Increase speed
Air leakage in suction line Seal the line and the connection ports
Worn or damaged impeller Replace impeller
Worn or damaged front cover, wear plate,
cam
Replace parts
Worn or damaged shaft seal Replace shaft seal
No sealing compound on cam and cam screw Apply recommended sealing compound
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