Troubleshooting - EBARA FSA Instruction Manual

Troubleshooting

All service should be done by factory trained or qualified personnel only.
Trouble
Motor does not start (1)
(2)
(3)
(4)
Pump is operating but (1)
there is no water (2)
discharge Does not (3)
obtain specified (4)
discharge volume (5)
(6)
(7)
(8)
(9)
(10) Air Suction.
(11) Foot valve or suction piping end not submerged
(12) Discharge piping leakage.
(13) Impeller corroded.
(14) Impeller worn.
(15) Casing ring worn.
(16) Liquid temperature too high. Volatile liquid.
Water Discharge (1)
but soon stops (2)
(3)
(4)
Overloads (over current) (1)
(2)
(3)
(4)
Pump vibrates (1)
Excessive noise. (2)
(3)
(4)
(5)
(6)
(7)
Excessive leakage from (1)
shaft seal. (2)
(3)
(4)
(5)
(6)
(7)
(8)
Shaft sealing overheats (1)
(2)
(3)
(4)
(5)
(6)
Cause
Motor malfunction.
Power source malfunction.
Rotating parts in contact, rusted, burnt out.
Foreign matter clogging contacting parts.
Pump not primed.
Valve closed, insufficiency open.
Excessive piping loss.
Suction height too high for pump.
Cavitations.
Rotation direction reserved.
Rotation speed low.
•
Wrong number of poles in motor.
•
60 Hz pump being used in 50 Hz area.
•
Voltage drop.
Impeller clogged.
Piping clogged.
sufficiently.
Insufficient priming.
Air suction.
Air pocket in suction piping.
Suction height too high for pump.
Head low. Excessive volume flow.
Rotation speed low.
•
Wrong number of poles in motor.
•
50 Hz pump being used in 60 Hz area.
Rotating parts in contact. Shaft bent.
Liquid density, viscosity too high.
Piping vibration.
Rotation direction reserved.
Rotating parts in contact. Shaft bent.
Cavitations.
Excessive discharge volume.
Insufficient discharge volume.
Excessive pump operation with discharge.
valve Insufficiently open.
Damage mechanical seal.
Excessive influx pressure.
Incorrect installation of packing.
Damaged packing.
Shaft or sleeve worn.
Excessive influx pressure.
Shaft bent.
Excessive water flushing pressure.
Packing too tight.
Packing tightened unevenly.
Inappropriate water flushing pressure, volume.
Shaft sleeve worn.
Lantern ring positioned incorrectly.
Excessive influx pressure.
CAUTION
(1) Repair motor.
(2) Inspect, repair, or consult power company.
(3) Manually rotate, reassemble. Have
(4) Remove foreign matter.
(1) Prime.
(2) Open Valve.
(3) Re-examine original plan.
(4) Re-examine original plan.
(5) Consult specialist.
(6) Correct rotation direction.
(7) Check with tachometer.
(8) Remove foreign matter.
(9) Remove foreign matter.
(10) Inspect, repair suction piping, shaft sealing.
(11) Extend suction piping and submerge end to
(12) Inspect, repair.
(13) Check quality of liquid and consult specialist.
(14) Replace impeller.
(15) Replace casing ring.
(16) Re-examine original plan.
(1) Prime sufficiently.
(2) Inspect, repair suction piping, shaft sealing.
(3) Reinstall piping.
(4) Re-examine original plan.
(1) Partially close discharge valve.
(2) Check with tachometer.
•
•
(3) Have repaired in specialist shop.
(4) Re-examine original plant.
(1) Reinforce piping support.
(2) Check with arrow and rewire.
(3) Have repaired in specialist shop.
(4) Consult specialist.
(5) Partially close discharge valve.
(6) Operate at specified flow level.
(7) Open sufficiently.
(1) Replace piping support.
(2) Re-examine original plan.
(3) Reinstall.
(4) Replace packing.
(5) Replace with new parts.
(6) Re-examine original plan.
(7) Have repaired in special shop.
(8) Adjust to appropriate pressure.
(1) Adjust
(2) Adjust
(3) Adjust to correct pressure and flow.
(4) Replace with new part.
(5) Correct position.
(6) Re-examine original plan.
- 7 -
Remedy
repaired in specialist shop.
•
Check nameplate and change.
•
Check nameplate and change.
•
Check power source and remedy.
sufficient depth.
Check nameplate and change.
Check nameplate and change.