Wilo SiBoost Smart Série Notice De Montage Et De Mise En Service page 89

English
Fault
Motor or pump become too warm
Current consumption too high
Motor protection switch triggers
Pump(s) produces no or too little power Major fluctuations of the inlet pressure Check the inlet pressure and take measures
Pump(s) produces no or too little power Non-return valve blocked
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Cause
Air in the inlet
Gate valve in the system closed or not
sufficiently open
Impellers blocked
Non-return valve blocked
Shut-off device closed at pressure
sensor
Switch-off point set too high
Bearing damage
Turn-to-turn fault in the motor
Mains voltage: a phase is missing
Non-return valve leaking
Flow rate too high
Turn-to-turn fault in the motor
Mains voltage: a phase is missing
Non-return valve defective
Flow rate too high
Contactor defective
Turn-to-turn fault in the motor
Mains voltage: a phase is missing
Inlet pipe blocked or shut off
Nominal diameter of the inlet pipe too
small
Inlet pipe installed incorrectly
Air in the inlet
Impellers blocked
Non-return valve leaking
Gate valve in the system closed or not
sufficiently open
Low-water level switch has been
triggered
Incorrect direction of rotation of the
motors
Turn-to-turn fault in the motor
Remedy
Check and shut off the piping and vent the
pumps if necessary
Check and open the shut-off device
completely if necessary
Check the pump and replace it or have it
repaired if necessary
Check and remove the blockage or replace
the non-return valve if necessary
Check and open the shut-off device if
necessary
Check the setting and correct it if necessary
Check the pump/motor and replace it or
have it repaired if necessary
Check, if necessary replace motor or have it
repaired
Check the fuses, cables and connections
Check and replace the seal or non-return
valve if necessary
Check the pump data and default values and
correct if necessary
Check, if necessary replace motor or have it
repaired
Check the fuses, cables and connections
Check and replace the non-return valve if
necessary
Check the pump data and default values and
correct if necessary
Check it and replace it if necessary
Check, if necessary replace motor or have it
repaired
Check the fuses, cables and connections
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
Check the pump and replace it or have it
repaired if necessary
Check and replace the seal or non-return
valve if necessary
Check and remove the blockage or replace
the non-return valve if necessary
Check and open the shut-off device
completely if necessary
Check the inlet pressure or the level in the
break tank
Check direction of rotation and correct by
changing over phases if necessary
Check, if necessary replace motor or have it
repaired
WILO SE 08/2018