EBARA FSA, Instruction Manual, Page: 8 / 11

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