15
PROBLEMS
CAUSES
SOLUTIONS
Air entry in suction tube
Check pipe fittings and suction tube joints
THE PUMP DOES
Bad filter cover sealing
Clean the
pre-filter
cover
and check the
condition of the joint
NOT PRIME
Motor turning direction incorrect.(III)
Invert two phases of the feeding line
Blocked pre-filter
Clean the pre-filter
Air entry in suction tube
Check pipe fittings and suction tube joints
THE PUMP GIVES
Motor turning direction incorrect.(III)
Invert two phases of the feeding line
LOW FLOW-VOLUME
Load loss in suction
Prevent as much as possible, elements that
produce load loss
Wrong voltage
Check that the network voltage corresponds to
that on the motor specification board
Increase in terminal box temperature
because of voltage arch effect
Check terminal box connections
Heat protector blows
Correctly connect cables with terminal box
terminals
Fasten the cable to the terminal correctly
Modify size of connection cable to terminal box
terminals
THE MOTOR STOPS
Terminla boxes badly-connected
