Wilo SiBoost Smart Série Notice De Montage Et De Mise En Service page 88

Fault
Switching frequency too high or
fluttering
Pump(s) not stable and/or make
unusual noises
Installation and operating instructions Wilo-SiBoost Smart (FC) ... Helix V/... Helix VE/... Helix EXCEL
Cause
Major fluctuations of the inlet pressure Check the inlet pressure and take measures
Inlet pipe blocked or shut off
Nominal diameter of the inlet pipe
too small
Inlet pipe installed incorrectly
Shut-off device closed at pressure
sensor
No diaphragm pressure vessel present
(optional or accessory)
Supply pressure at existing diaphragm
pressure vessel incorrect
Valve on existing diaphragm pressure
vessel closed
Existing diaphragm pressure vessel
defective
Switching difference set too low
Major fluctuations of the inlet pressure Check the inlet pressure and take measures
Inlet pipe blocked or shut off
Nominal diameter of the inlet pipe
too small
Inlet pipe installed incorrectly
Air in the inlet
Air in the pump
Impellers blocked
Flow rate too high
Incorrect direction of rotation of the
motors
Mains voltage: a phase is missing
Pump not adequately secured to base
frame
Bearing damage
Remedy
to stabilise the inlet pressure if necessary
(e.g. pressure reducers)
Check the inlet pipe and remove the
blockage or open the shut-off device if
necessary
Check the inlet pipe and increase the cross-
section of the inlet pipe if necessary
Check the inlet pipe and change the pipe
routing if necessary
Check and open the shut-off device if
necessary
Retrofit a diaphragm pressure vessel
Check the supply pressure and correct it if
necessary
Check the valve and open it if necessary
Check the diaphragm pressure vessel and
replace if necessary
Check the setting and correct it if necessary
to stabilise the inlet pressure if necessary
(e.g. pressure reducers)
Check the inlet pipe and remove the
blockage or open the shut-off device if
necessary
Check the inlet pipe and increase the cross-
section of the inlet pipe if necessary
Check the inlet pipe and change the pipe
routing if necessary
Check and shut off the piping and vent the
pumps if necessary
Vent the pump, check the suction line for
leakages and seal it if necessary
Check the pump and replace it or have it
repaired if necessary
Check the pump data and default values and
correct if necessary
Check direction of rotation and correct by
changing over phases if necessary
Check the fuses, cables and connections
Check the fixation and re-tighten the
fastening screws if necessary
Check the pump/motor and replace it or
have it repaired if necessary
English
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