EP18-72-IOMM-2015-7
Fulton Ltd
Page 36
MAINTENANCE - 4
Problem
Cause
Remedy
FEEDWATER PUMP
Pump will not run
1. Supply failure.
Connect the electricity supply.
2. Fuses/Circuit Breakers are blown.
Replace fuses/Circuit Breakers.
3. Motor contactor overload has
tripped out.
Reactivate the motor protection.
4. Contactors not making
Check, the coil is faulty or wiring loose.
5. Control circuit is defective.
Repair the control circuit.
6. Motor is defective.
Replace the motor.
Motor starter overload,
trips out immediately
when supply is
switched on.
1. One fuse/automatic circuit breaker is
blown.
Replace the fuse, reset the circuit
breaker.
2. Contacts in motor contactor overload
are faulty.
Replace motor starter contacts.
3. Cable connection is loose or faulty.
Tighten or replace the cable connection.
4. Motor winding is defective.
Replace the motor.
5. Pump blocked.
Remove the blockage.
6. Overload setting too low.
Set the motor starter correctly.
Motor contactor
overload trips out
occasionally.
1. Overload setting is too low.
Set the overload correctly.
2. Low voltage at peak times.
Check the electricity supply.
Motor contactor has
not tripped out but the
pump does not run.
Check:
Motor does not run when started:
items: 1, 2, 4, 5, 6,
Pump capacity not
constant.
1. Pump inlet pressure is too low
(cavitation).
Check the suction conditions.
2. Suction pipe/pump partly blocked.
Clean the pump or suction pipe.
3. Pump draws in air.
Check the suction conditions.
Pump runs but gives
no water.
1. Suction pipe/pump blocked.
Clean the pump or suction pipe.
2. Foot or non-return valve blocked in
closed position.
Repair the foot or non-return valve.
3. Leakage in suction pipe.
Repair the suction pipe.
4. Air in suction pipe or pump.
Check the suction conditions.
5. Pump rotates in the wrong direction.
Change the direction of rotation of the
motor.
6. Boiler feedwater non-return valve
letting water passed the valve seat,
Check and clean boiler feedwater
non-return valve, ensure it is seating
(normally and not allowing water passed.
accompanied by banging in the feedwater
tank).
4.8.2
TROUBLESHOOTING
FEEDWATER PUMP
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