Fault Possible causes Suggested actions
Less discharge
from pump
Smaller pipe size used when
compared to name plate
recommendations
Replace with suggested pipe size
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
The check valve of the pump is
partly blocked
Check and clean check valve. Replace if necessary.
Impeller is worn out
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
Change in the static head
Check the actual static head
Running at low voltage
Wait for voltage to increase or contact local EB
representative
Current
consumption in
excess
Damage of thrust bearing
Replace the worn out bearing
Voltage too low
Check the voltage
Defective rotor
Change the rotor
Excessive wear and tear due to
rubbing of parts
Service the pump replacing the worn out parts
Low system head and therefore
higher discharge
Throttle the discharge
OMOW001A 22 2020 .01
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