Problem

Possible Cause

Action

Pump fails to operate

Power failure

Check the voltage. Contact power supplier for solution

Defective cable

Replace power cable

Impeller jammed or clogged

Clean the impeller

The motor protector tripped

Make sure liquid temperature is below 40°C pump and is completely submerged

Motor burn-out

Rewind or replace the motor

Water gets into motor after mechanical seal wear

Replace the mechanical seal & oil seal

Float switch defective

Replace a float switch

Impeller rusted

Remove rust

Faulty Control Panel

Repair or replace

Does not pump. Inadequate volume

Low value of aeration in J Series Pump

Motor rotation reversed

Reverse two of three leads on a three phase motor

Impeller worn or cavitation

Replace Impeller

Strainer block

Remove and clean the foreign objects

Impeller block

Remove and clean the foreign objects

Valves and pipe leakage or plugged

Remove plugged objects or replace

Excessive water head

Consult the distributor

Air suction due to low water level

Raise the water lever or adjust the float switch higher

Clogged aeration chamber (J series)

Remove the foreign objects

Worn nozzle (J series)

Replace with a new nozzle

Water level too high (J series)

Adjust the Level Switch lower

Over Current

Abnormal voltage

Check the power, and make sure it corresponds to the nameplate

Incorrect rotation

Reverse two of three leads on a three phase motor

High viscosity liquid

More liquid needs to be added to the pump fluid to decrease its viscosity(contact the distributor)

Foreign matter clogging pump or impeller

Remove the foreign objects

Worn Shaft

Repair and replace

Stops during operationPump

Foreign matter clogging pump or impeller

Remove the foreign objects

Abnormal voltage

Check the power, and make sure it corresponds to the nameplate

The motor protector tripped

Make sure liquid temperature is below 40°C and pump is completely submerged

Electric Leakage Circuit Breaker Activated

Power Cable damaged

Replace new power cable

Wet cable terminal

Re-connect wires using waterproof tape after drying

Water ingress caused by worn mechanical seal

Replace new Mechanical seals and oil seal

Motor burn out

Repair or replace new motor