DAB KV 3 Serie Instrucciones Para La Instalación Y El Mantenimiento página 26

9. The pump flow rate is
not constant.
10. The pump turns in the
opposite direction when
switching off.
11. The pump vibrates and
operates noisily.
A. Intake pressure too low.
B. Intake pipe or pump partly blocked by
impurities.
A. Leakage in the intake pipe.
B. Foot valve or check valve faulty or blocked in
partly open position.
A. Check that the pump and/or the pipes are firmly
anchored.
B. There is cavitation in the pump (see point 7,
paragraph on INSTALLATION)
C. The pump is running above its plate
characteristics.
D. The pump is not turning freely.
ENGLISH
B. Clean the intake pipe and the pump.
A. Eliminate the fault.
B. Repair or replace the faulty valve.
A. Fasten any loose parts.
B. Reduce the intake height or check for load
losses.
C. Reduce the flow rate.
D. Check the state of wear of the bearings.
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