ENGLISH
21
Fault
Check (possible cause)
Remedy
The pump flow rate is not constant.
−
Intake pressure too low.
−
Intake pipe or pump partly
blocked by impurities.
Remove clog.
The pump turns in the opposite
direction when switching off.
−
Leakage in the intake pipe.
−
Foot valve or check valve faulty
or blocked in partly open position.
Repair or replace the faulty valve.
The pump vibrates and operates
noisily.
−
Check that the pump and/or the
pipes are firmly anchored.
−
There is cavitation in the pump.
Reduce the intake height or check
for load losses.
−
The pump is running above its
plate characteristics.
Reduce the flow rate.
−
The pump is not turning freely.
Check the state of wear of the
bearings.
