Wilo Star-Z NOVA Notice De Montage Et De Mise En Service page 24

Faults
Faults, displays
Additional display
symbols are
shown.
Pump does not
start.
The pump makes
noises.
24
Causes
Frequency overlap when
operating in an industrial
environment or in the
proximity of radio
transmitters.
Power supply cable break,
short-circuit or defective
fuses.
The time switching func-
tion has switched off
automatically.
Motor is blocked, e.g. by
deposits from the water
mains.
Motor scraping, e.g.
caused by deposits from
the water mains.
Running dry, too little
water.
Air in the pump.
NOTICE: If you cannot rectify the fault,
contact a specialist technician.
Remedy
This fault has no effect on
the function of the pump.
Have the power supply
checked by a qualified
electrician.
Check the time switching
function setting

Page 20.
Get the pump removed by
a qualified technician

Page 15.
Ensure that the impeller
can move freely again by
turning it and rinsing out
the dirt that has accumu-
lated.
Check the shut-off
devices, they must be
fully open.
Switch the pump on/off
5 x for 30 s at a time.
WILO SE 05/2021