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OPERATING AND MAINTENANCE MANUAL
CENTRIFUGAL ELECTRIC PUMP 2PDC SERIES
8. PROBLEM SOLVING
PROBLEM
POSSIBLE CAUSES
1. The suction and discharge pipe circuit
Pump runs but does
and the impeller are blocked.
not draw water.
2. Suction connectors are leaking.
3. Water level is lower than required.
1. Impeller seriously damaged.
Insufficient flow.
2. Sealing ring is damaged.
3. Motor speed is lower than required.
1. Incorrect rotation.
Loss of head.
2. NPSH due to high water temperature.
3. Impeller seriously damaged.
1. Flow above the applicable range.
2. Mechanical wear is present.
Motor overheating
3. Voltage is lower or higher than standard
or the motor fan is damaged.
1. The motor bearing is damaged or there is
a lack of lubricating oil.
Leaks in the pump.
2. Vibration is caused by unbalanced
ground.
1. The motor bearing is damaged or there is
Heavy motor
a lack of lubricating oil.
vibration, loud noise,
2. Vibration is caused by unbalanced
bearing gets hot.
ground.
1. Flow is above the applicable range and
Noise in pump in the
causes loss of head.
pump
2. Nut is loose.
www.proindecsa.com / proindecsa@proindecsa.com
SOLUTIONS
1. Clean the pipe circuit and the impeller.
2. Seal the connection surfaces.
3. Reinstall and lower the suction pipe.
1. Replace with a new one.
2. Replace with a new one.
3. Make sure voltage is normal.
1. Rewire the motor (three-phase motor).
2. Reduce the temperature of the fluids.
3. Replace with a new one.
1. Make sure that the correct pump model
was chosen or adjust the outlet valve so
that the pump operates around the rated
range.
2. Check for and remove mechanical wear.
1. Replace with a new one.
2. Replace with a new one.
1. The adjustment motor is aligned with the
centre of the pump, replace the bearing or
clean the bearing and add lubricating oil.
2. Align the base and tighten the bracket
bolt.
1. Make sure that the correct pump model
has been chosen and turn off the outlet
valve.
2. Tighten nuts.
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