BADU Normblock Multi Originalbetriebsanleitung Seite 93

Fault: Pump is loud
Possible cause
Pump and pipes not
completely ventilated or
filled.
Suction height too
large/Unit's NPSH
(intake) too low.
Wear of components.
Dynamic head lower than
that indicated in the
order.
Pump strained or
vibrations in the pipes.
Imbalanced rotor.
Pump and/or motor
bearings are damaged.
Flow rate too low.
04/2019
Solution
 Ventilate pump.
 Fill pump.
 Correct the fluid level.
 Install pump lower.
 Completely open shut-off valve
in the intake.
 If the resistance is too large,
modify the intake line.
 Check suction basket/suction
opening.
 Observe the permitted pressure
reduction speed.
 Replace components.
 Set operating point exactly.
For constant overload turn the

impeller (further enquiry
required).
 Check pipe connections and
pump fasteners, if necessary
reduce the pipe bracket
spacing.
 Fasten pipes using vibration
reducing materials.
Clean pump and pump parts.

Replace bearing.

 Increase minimum flow rate.
Faults
EN 33