11 - TROUBLESHOOTING
Before starting to look for faults it is necessary to disconnect the
power supply to the pump (take the plug out of the socket).
Solving typical problems
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 16.4 (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. 5.2).
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. )DXOW\ÀRZVHQVRU
1. &KHFNWKHV\VWHP¿QGDQG
eliminate the leak.
2. Dismantle the system and
remove the obstructions (as-
sistance service).
3. &KHFNWKHVXFWLRQSLSH¿QG
and eliminate the cause of air
getting in.
4. Contact the assistance centre.
,QVXI¿FLHQW
delivery
Red: off
White: on
Blue: off
1. Suction depth too
high.
2. Suction pipe
clogged or diam-
HWHULQVXI¿FLHQW
3. Impeller or hydrau-
lic part clogged.
1. As the suction depth increases
the hydraulic performance of
the product decreases (De-
scription of the Electropump).
Check whether the suction
depth can be reduced. Use
a suction pipe with a larger
diameter (but never smaller
than 1”).
2. &KHFNWKHVXFWLRQSLSH¿QGWKH
cause of choking (obstruction,
dry bend, counterslope, …) and
remove it.
3. Dismantle the system and
remove the obstructions (as-
sistance 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. &KHFNWKHV\VWHP¿QGDQG
eliminate the leak.
2. Service the non-return valve as
described in par. 16.3.
The water
pressure
when turn-
ing on the
utility is not
immediate.
Red: off
White: on
Blue: off
Expansion vessel
HPSW\LQVXI¿FLHQW
air pressure) or has
broken diaphragm.
Check the air pressure through
the valve in the technical compart-
ment. If water comes out when
checking, the vessel is broken:
assistance service. Otherwise
restore the air pressure according
to the equation par. 1.2.
When the
utility is
turned on
WKHÀRZ
falls to zero
before the
pump starts
Red: off
White: on
Blue: off
Air pressure in the ex-
pansion vessel higher
than the system start-
ing pressure.
TCalibrate the expansion ves-
VHOSUHVVXUHRUFRQ¿JXUHWKH
parameters SP and/or RP so as to
satisfy the equation par.1.2.
ENGLISH
GB
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