Spare Parts - Wilo -MVISE-2G Betriebsanleitung

Other defects, not detected by the converter,
due to the pump
Defects
The pump is running but no delivery
The pump is vibrating
No sufficient pressure for the pump
The flow is irregular
In mode 2, the pump don't stop if the
flow is zero
WARNING ! If the liquid is toxic, corrosive or
dangerous for human being, WILO or the quali-
fied person in charge of the repairing must be
informed. In this case, clean the pump to ensure
a complete safety to the repairing man.

10. Spare parts

Spare parts are ordered via a local specialist dea-
ler and/or Wilo customer service.
In order to avoid queries and incorrect orders,
make sure to mention all data indicated on the
rating plate when placing your order.
Subject to technical alterations !
WILO AG 06/2008
Causes
The pump does not run quickly enough
The internal parts are obstructed by par-
ticles
Suction pipes are obstructed
Air in suction pipes
Suction pressure is too low, it causes
generally cavitation noise
Loose on its foundation
Particles obstructing the pump
The motor speed is not high enough
The motor is defective
Bad filling of the pump
The suction pipe has a lower diameter
than the one of the pump
The strainer and the suction pipe are
partially obstructed
In mode 2, the pressure sensor is not
adequate
The non-return valve is not tight
The non-return valve is not adequate
The tank has low capacity due to instal-
lation
Remedies
Check the adequate adjustment of the
requirement (conformity to the required
points)
Let dismantle the pump and clean it
Clean all the pipes
Check tightness of the whole pipe up to
the pump and make it tight
Too high losses of load on suction or the
pressure in the suction is too low
Check and tighten completely the nuts
of the stud bolts
Have the pump dis-mantled and cleans it
Check if the set value is correctly adju-
sted
Replace it
Open the venting device and vent until
there are no more air bubbles
The suction pipe must have at least the
same diameter as the suction pump port
Remove and clean
Put a sensor with conforming pressure
scale and accuracy (see chapter 5.3)
Clean it or change it
Replace it by an adequate non-return
valve
Change it or add an other one on the
installation
English
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