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
