SAER Elettropompe IR, Use And Maintenance Manual

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9. TROUBLESHOOTING
FAILURES OR
MALFUNCTIONS
ID PROBABLE REASONS
REMEDY ACTIONS
! No flow A.1
→
Wrong direction of rotation
3
Verify the rotation direction of the motor. If correct, verify
the right assembly of the impeller with the pump body.
A.2 → Pump not filled with the fluid
3
Fill the pump and the suction pipe, with the fluid.
A.3 → Air presence in the pump or in the
suction pipeline
3
Verify the possible losses of the pipeline. Breathe the
pump in order to get out the air.
A.4 → Suction pipeline not enought
immersed.
3
Increase the immersion of the suction, that is sublevelled
A.5
→
Suction head too raised
3
Low the level of the pump
A.6 → Impeller or suction line clogged.
3
Check any eventual obstuction of the sucton filters and of
the impeller. Remove the obstruction.
A.7 → Isufficience of the motor rotation
speed.
3
Check the motor rotation speed. For motors powered by
inverter, check the feed frequency.
A.8 → Head of the pumping plant too hight.
3
Check the outlet valves holes. Make a calculation of the
pumping plant and compare it whit the one of the pump.
Use a pump with higher head.
! Insufficient flow
rate
Reasons already listed on previous
points
Consider points: from A.1 to A.7
B.1 → Cavitation functioning. NPSHa
insufficient.
3
Icrease the pumping plant NPSHa, reducing the suction
losses, or approaching the pump to the fluid that has to
be aspirated.
B.2 → Losses from the seals.
3
Replace the seals
B.3 → Demaged impellers.
3
Replace the impeller.
B.4
→
Demaged wear rings.
3
Replace the wear rings.
B.5 → Foot valve too slim
3
Replace the foot valve .
! Outlet pressure
too low
Reasons already listed on previous
points
Consider points: A.1, A.3 ÷ A.7,B.2 ÷ B.4
C.1 → Outlet line ostructions
3
Remove the ostructions
C.2 → Pressure gauge wrong positioning
3
Position the outlet pressure gauge on the outlet and the
inlet pressure gauge on the inlet
! High absorbtion
Reasons already listed on previous
points.
Consider points: A.1, B.1 ÷ B.3
D.1 → Usury or mechanical seizure
3
Check and, where necessary, replace seals, bearings
and wear rings.
D.2
→
Functioning out of performance
curves.
The head is lower than the minimum
head allowed
3
Act on the outlet regulation valve to increase the head
and low the flow rate.
D.4
→
Excessive speed of the motor speed
rotation.
3
Check the corrispondence between motor speed and
pump. When the motor is powered by inverter, low the
frequency
D.5 → Fluid density / viscosity higher then
of the contractual ones
3
Low the flow rate. Call the technical assistance
D.7 → Motor problems
3
Refer to motor informations.
! Vibrations or
high noise
Reason already listed on previous
points.
Consider points: a3-a6, b1,b3-b4,d1,d2,d3, d5,d6, d7
E.1 → Pump, motor o basament not
properly setted
3
Check the tightening of all anchor bolts
E.2
→
Pipeline misaligned or imposed on
the pump
3
Support the pipes checking their alignment with the
pump.
E.3 → Damaged bearings
3
Replace the bearings
10. SPARE PARTS
TS
Use only original spare parts. To order spare parts, refer to the catalogues or contact the SAER Technical assistance specifying the kind
of the motor, the serial number and the year of manufacture (all these data are to be found in the identification plate). This product is free
from the manufacturing defects.
Keep the manual for future reference - For more informations visit www.saerelettropompe.com