Flowserve PLEUGER Bedienungsanleitung PDF herunterladen (Seite 36)

PLEUGER STANDARD USER INSTRUCTIONS ENGLISH 71569293 01-13

Page 36 of 40 flowserve.com

FAULT SYMPTOM

Motor protection triggered

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Pump does not start

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Motor overheats

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Unit runs but does not pump

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Unit vibrates or is noisy

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Motor loses filling liquid

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Pump requires excessive power

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Pump does not draw in water at start

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Insufficient pressure developed

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Insufficient capacity developed

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PROBABLE CAUSES

POSSIBLE REMEDIES

A. System problems

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Abrasive solids in liquid pumped.

Check and consult Flowserve.

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Internal misalignment due to improper repairs

causing impeller to rub.

Check method of assembly, possible damage

or state of cleanliness during assembly.

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Excessive thrust caused by a mechanical

failure inside the pump.

Check wear condition of impeller, its

clearances and liquid passages.

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Improper installation of bearings.

Check method of assembly, possible damage

or state of cleanliness during assembly and

type of bearing used.

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Damaged bearings due to contamination.

Check contamination source and replace

damaged bearings.

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Slide valve not fully open.

Open slide valve.

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Pressure pipe clogged. Foreign body in the

pipe line.

Clean pipe work.

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Pump blocked by impurities inside the pump.

Disassemble pump section and clean.

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Pump or motor sluggish.

Check smooth running of motor/pump.

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Well filter clogged up.

Remove unit and regenerate well.

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Coupling between pump and motor faulty.

Remove unit and repair.

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Suction strainer clogged up.

Remove unit and clean suction strainer.

C. Electrical problems

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Wrong direction of rotation of motor.

Reverse two phases at motor terminal box.

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Motor circuit breaker incorrectly adjusted.

Readjust motor circuit breaker according to

data card or rating plate.

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Motor running too slow. Under voltage or

wrong frequency.

Check if system voltage and frequency agree

with data sheet.

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Phase failure.

Examine power cable for damage. Check

fuses.

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Blown fuses.

Replace fuses.

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Damaged power cables.

Replace power cables.

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