MULTIBOOST
Problem Probable Cause Possible remedy
Motor does not start No power supply Check power supply, and panel
board connection diagram
Impeller is jammed Check if pump internals are clogged
and clean them.
Capacitor has failed Replace the capacitor as given.
Thermal overload protector Allow the motor to cool and switch
(T.O.P.) is open due to over ON. Install the pump set in a more
heat ventilated are, do not wrap the
pump with air tight materials,
avoid installing the pump near to
the heat generating equipment's.
Low voltage / Speed low Check supply voltage and operate
only if supply condition are healthy.
Pump does not deliver Speed is too slow Check supply voltage and frequency.
Water Air enters in the suction pipe Make air tight joints / if required
replace the pipe.
No water in the pumpset Fill water in pump casing.
Mechanical seal is leaking Refit the mechanical seal or
replace it.
Foot valve is not working Refit or change foot valve.
Foot valve is not submerged Lower the foot valve.
Pump discharge is less Suction lift (water level to Ensure that the suction lift is not
pump suction nozzle level) more than maximum recommended
too high. lift, if required lower the pump level.
Suction pipe inlet inadequately Increase submergence to
submerged in water recommended level.
Suction pipe / foot valve is Clean the pipe / foot valve.
clogged
Site head is higher than Select alternate suitable pumpset.
selection
Too many bends in suction Try to reduce the number of bends.
pipe
Pipe size diameter is smaller Use pipe of correct diameter.
than recommended
Fuse blow off frequently Improper pumpset selection Select suitable pumpset.
Pump set consumes
excessive power Lower voltage Wait for proper line voltage.
Bearings have short life Rotor excessively out Replace the rotor.
Lack of lubrication Ensure proper lubrication.
Excessive grease in bearings Remove excess grease from the
bearings.
7. Trouble shooting
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