EN
ENGLISH
71
Solving typical problemsi
Fault
LED
Probable Causes
Remedies
The pump
does not
start.
Red: off
White: off
Blue: off
No electric power.
Check whether there is voltage in
the socket and insert the plug again.
The pump
does not
start.
Red: on
White: on
Blue: off
Shaft blocked.
See paragraph 9.4 (motor shaft
maintenance).
The pump
does not
start.
Red: off
White: on
Blue: off
Utility at a level higher
than the system
restarting pressure
level (par. 3.2).
Increase the system restarting
pressure level by increasing SP or
decreasing RP.
The pump
does not
stop.
Red: off
White: on
Blue: off
1. Leak in the
system.
2. Impeller or hydrau
-
lic part clogged.
3. Air getting into the
suction pipe.
4. Faulty flow sensor
1. Check the system, find and
eliminate the leak.
2. Dismantle the system and
remove the obstructions (assis
-
tance service).
3. Check the suction pipe, find
and eliminate the cause of air
getting in.
4. Contact the assistance centre.
Insufficient
delivery
Red: off
White: on
Blue: off
1. Suction depth too
high.
2. Suction pipe
clogged or diame
-
ter insufficient.
3. Impeller or hydrau
-
lic part clogged.
1. As the suction depth increases
the hydraulic performance of
the product decreases. Check
whether the suction depth can
be reduced. Use a suction pipe
with a larger diameter (but never
smaller than 1”).
2. Check the suction pipe, find the
cause of choking (obstruction,
dry bend, counterslope, …) and
remove it.
3. Dismantle the system and
remove the obstructions (assis
-
tance service).
The pump
starts with
-
out utility
request.
Red: off
White: on
Blue: off
1. Leak in the
system.
2. Faulty non-return
valve.
1. Check the system, find and
eliminate the leak.
2. Service the non-return valve as
described in par. 9.3.
The water
pressure
when turn
-
ing on the
utility is not
immediate.
Red: off
White: on
Blue: off
Expansion vessel
empty (insufficient
air pressure) or has
broken diaphragm.
Check the air pressure in the ex
-
pansion vessel. If water comes out
when checking, the vessel is bro
-
ken: assistance service. Otherwise
restore the air pressure according to
the equation par. 1.2.
When the
utility is
turned on
the flow
falls to
zero before
the pump
starts
Red: off
White: on
Blue: off
Air pressure in the ex
-
pansion vessel higher
than the system
starting pressure.
TCalibrate the expansion vessel
pressure or configure the parame
-
ters SP and/or RP so as to satisfy
the equation par.1.2.
