Wilo MVISE 2G Series, Инструкция по установке и эксплуатации

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35 WILO AG 06/2008
English
Other defects, not detected by the converter,
due to the pump
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 !
Defects Causes Remedies
The pump is running but no delivery The pump does not run quickly enough Check the adequate adjustment of the
requirement (conformity to the required
points)
The internal parts are obstructed by par-
ticles Let dismantle the pump and clean it
Suction pipes are obstructed Clean all the pipes
Air in suction pipes Check tightness of the whole pipe up to
the pump and make it tight
Suction pressure is too low, it causes
generally cavitation noise Too high losses of load on suction or the
pressure in the suction is too low
The pump is vibrating Loose on its foundation Check and tighten completely the nuts
of the stud bolts
Particles obstructing the pump Have the pump dis-mantled and cleans it
No sufficient pressure for the pump The motor speed is not high enough Check if the set value is correctly adju-
sted
The motor is defective Replace it
Bad filling of the pump Open the venting device and vent until
there are no more air bubbles
The flow is irregular The suction pipe has a lower diameter
than the one of the pump The suction pipe must have at least the
same diameter as the suction pump port
The strainer and the suction pipe are
partially obstructed Remove and clean
In mode 2, the pressure sensor is not
adequate Put a sensor with conforming pressure
scale and accuracy (see chapter 5.3)
In mode 2, the pump don’t stop if the
flow is zero The non-return valve is not tight Clean it or change it
The non-return valve is not adequate Replace it by an adequate non-return
valve
The tank has low capacity due to instal-
lation Change it or add an other one on the
installation