Fault Possible causes Suggested actions
Less discharge
from pump
Discharge pipe internally coated
with depositions
Clean the pipe
Foreign bodies lodged in impellers
Check the impellers and remove the foreign bodies
The valve in the discharge pipe is
partly closed / blocked
Check and clean / replace the valves, if necessary
Discharge pipe internally coated
with depositions
Check and clean NRV. Replace if necessary
Foreign bodies lodged in impellers
Check and replace
Leakage in the pipework
Check and repair / replace piping
Total head
developed
is too low
Abrasive wear of pump hydraulics
due to operation in water of higher
sand content or corrosiveness
Change the worn-out pump parts
Running at low-voltage
Wait for voltage to increase or contact local EB
representative
Low system head and therefore
higher discharge
Throttle the discharge
Pump runs
rough and
noisy
Dry running of pump
Keep pump idle for sometime/reduce the discharge
by throttling
Shaft is bent
Replace the shaft
Excessive wear and tear
Service the pump replacing the worn out parts
Pump leaks
excessively
Gaskets / O-rings damaged
Check and replace gaskets / O- rings
Pipeline damaged
Check and replace piping
Gaskets / O-rings damaged
Check and replace gaskets / O- rings
Pipeline damaged
Check and replace piping
OMOW002A 25 2020.01
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