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Fig. 3.4
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 section "Refi lling procedure"
to page 12 of this manual. Bleed any air
present in the radiators, if necessary.
The pressure on the pressure gauge 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 "Refi lling procedure" to page 12 of this
manual. If topping up with water has to
be done very frequently, have the system
checked for leaks.
- 18 -
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.
Water should occasionally leak from the
boiler
Shut off the valves positioned under the
boiler to page 15 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
so that the causes can be understood.
In order to access the INFO mode, press
keys 11 and 13 ( Fig. 3.5 ) at the same time
until the letter di appears on the display that
alternates with a code ( Fig. 3.6 ).
In this case or in case of prob-
lems other than those men-
tioned here, switch off the boiler,
as described in section "Extin-
guishing" to page 14 and call a
competent
and
Service Engineer.
Displaying in INFO mode
responsible
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