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Another possible signal occurs when the
d.h.w. exchanger cannot exchange all of the
power supplied by the boiler.
E.g.: d.h.w. exchanger clogged with lime
scale. This happens only when the boiler
has a request for d.h.w..
Code 01 appears on the LCD display that
preceded with the letter L. The display
background flashes (Fig. 3.5).
Fig. 3.5
In order to reset good function-
ing of the boiler, call a compe-
tent and responsible Service
Engineer.
Noise due to air bubbles are heard dur-
ing operation
You should check that the pressure on the
pressure gauge is not below the correct set-
ting.
If required, top up the system correctly, as
described in the section "Refilling proce-
dure" to page 14 of this manual. Bleed any
air present in the radiators, if necessary.
The pressure has gone down
It is necessary to top up the appliance with
water again, so as to raise the pressure to
an adequate level as described in the sec-
tion "Refilling procedure" to page 14 of this
manual. If topping up with water has to
be done very frequently, have the system
checked for leaks.
- 26 -
USEFUL ADVICE
Water comes out of the pressure relief
valve
Check on the pressure gauge that the pres-
sure in the central heating circuit is not
close to 3 bars. In this case, temperature
rise in the circuit can cause the pressure
relief valve to open. So that this does not
happen and to decrease the pressure to a
normal value, it is advisable to vent some of
the water in the appliance through the bleed
valves present in the radiators.
Reduced domestic hot water tempera-
ture
The likely causes may be impurities caught
in the domestic hot water flow switch filter or
limescale deposited in the domestic hot wa-
ter heat exchanger. It is advisable to have
the appliance cleaned out by an Authorised
Service Centre Engineer.
Water should occasionally leak from the
boiler
Shut off the valves positioned under the
boiler to page 23 and call an Authorised
Service Centre Engineer.
3.7
The INFO mode allows the display of some
information on the boiler functioning status.
In case of malfunctioning of the boiler, it may
be useful to communicate such information
to the Authorised Service Centre Engineer
In this case or in case of prob-
lems other than those men-
tioned here, switch off the boil-
er, as described in section
"Extinguishing" to page 23 and
call a competent and responsi-
ble Service Engineer.
Displaying in INFO mode
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