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ENGLISH
10 - 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 problemsi
Fault
LED
Red: off
The pump
White: off
No electric power.
does not
Blue: off
start.
The pump
Red: on
White: on
Shaft blocked.
does not
start.
Blue: off
The pump
Red: off
Utility at a level higher
White: on
than the system restarting
does not
start.
Blue: off
pressure level (par. 3.2).
1. Leak in the system.
2. Impeller or hydraulic
The pump
Red: off
part clogged.
White: on
does not
3. Air getting into the
stop.
Blue: off
suction pipe.
4. Faulty flow sensor
67
Probable Causes
Remedies
Check whether there is voltage in the socket
and insert the plug again.
See paragraph 9.4 (motor shaft mainte-
nance).
Increase the system restarting pressure
level by increasing SP or decreasing RP.
1. Check the system, find and eliminate
the leak.
2. Dismantle the system and remove the
obstructions (assistance service).
3. Check the suction pipe, find and elimi-
nate the cause of air getting in.
4. Contact the assistance centre.
1. Suction depth too high.
Red: off
2. Suction pipe clogged or
Insufficient
White: on
diameter insufficient.
delivery
Blue: off
3. Impeller or hydraulic
part clogged.
The pump
Red: off
1. Leak in the system.
starts without
White: on
2. Faulty non-return
utility request.
Blue: off
valve.
The water
pressure
Red: off
Expansion vessel empty
when turning
White: on
(insufficient air pressure)
on the utility
Blue: off
or has broken diaphragm.
is not imme-
diate.
When the
utility is
turned on the
Red: off
Air pressure in the expan-
flow falls to
White: on
sion vessel higher than the
zero before
Blue: off
system starting pressure.
the pump
starts
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 (assistance service).
1. Check the system, find and eliminate
the leak.
2. Service the non-return valve as
described in par. 9.3.
Check the air pressure in the expansion
vessel. If water comes out when checking,
the vessel is broken: assistance service.
Otherwise restore the air pressure accord-
ing to the equation par. 1.2.
TCalibrate the expansion vessel pressure or
configure the parameters SP and/or RP so
as to satisfy the equation par.1.2.
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