Flowserve PLEUGER - Manual (Page 36)

PLEUGER STANDARD USER INSTRUCTIONS ENGLISH 71569293 01-13
Page 36 of 40
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FAULT SYMPTOM
Motor protection triggered

Pump does not start

Motor overheats

Unit runs but does not pump

Unit vibrates or is noisy

Motor loses filling liquid

Pump requires excessive power

Pump does not draw in water at start

Insufficient pressure developed

Insufficient capacity developed

PROBABLE CAUSES POSSIBLE REMEDIES
A. System problems
    Abrasive solids in liquid pumped. Check and consult Flowserve.
     
Internal misalignment due to improper repairs
causing impeller to rub. Check method of assembly, possible damage
or state of cleanliness during assembly.
  
Excessive thrust caused by a mechanical
failure inside the pump. Check wear condition of impeller, its
clearances and liquid passages.
   Improper installation of bearings.
Check method of assembly, possible damage
or state of cleanliness during assembly and
type of bearing used.
   Damaged bearings due to contamination.
Check contamination source and replace
damaged bearings.
   Slide valve not fully open. Open slide valve.
    Pressure pipe clogged. Foreign body in the
pipe line.
Clean pipe work.
    Pump blocked by impurities inside the pump. Disassemble pump section and clean.
      Pump or motor sluggish. Check smooth running of motor/pump.
    Well filter clogged up. Remove unit and regenerate well.
  Coupling between pump and motor faulty. Remove unit and repair.
      Suction strainer clogged up. Remove unit and clean suction strainer.
C. Electrical problems
    Wrong direction of rotation of motor. Reverse two phases at motor terminal box.
 Motor circuit breaker incorrectly adjusted.
Readjust motor circuit breaker according to
data card or rating plate.
      
Motor running too slow. Under voltage or
wrong frequency. Check if system voltage and frequency agree
with data sheet.
     Phase failure.
Examine power cable for damage. Check
fuses.
     Blown fuses. Replace fuses.
  Damaged power cables. Replace power cables.