External Cleaning; Operational Faults - Biasi Inovia 25C ERP User Manual And Installation Instructions

• condensing heat exchanger;
• burner;
• exhaust fume duct and flue;
• pressurisation of the expansion tank;
• filling up of the central heating circuit;
• bleeding of air from the central heating
system;
• general check of the appliance's opera-
tion.
3.5

External cleaning

Before carrying out any clean-
ing, disconnect the appliance
from the electrical mains, using
the fused spur isolation switch
fitted adjacent to the appliance.
To clean the external panels, use a cloth
soaked in soapy water. Do not use solvents,
abrasive powders or sponges.
Do not carry out cleaning of the appliance
and/or its parts with readily flammable sub-
stances (for example petrol, alcohols, naph-
tha, etc.).
3.6

Operational faults

If the boiler does not function and a code
that precedes the letter E and the writing
RESET (see "LCD general features" to
page 9) appear on the LCD display, it in-
dicates that the safety lock-out has stopped
the boiler. The display background flashes
(Fig. 3.3).
Fig. 3.3
For the first lighting up and following main-
tenance procedures for the gas supply, it
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USEFUL ADVICE
may be necessary to repeat the resetting
operation several times so as to remove the
air present in the pipe work.
Safety lock-out may occur even in case of a
blockage of the condensate drainage (e.g.
plugged drain pipe). It is advisable to check
the condensate drainage pipe and traps for
cleanness.
Press the reset key on the boiler control
panel 15 (Fig. 3.1) to reset its functioning.
Other operational faults signalled on the
LCD display
If the LCD display displays a code that pre-
cedes the letter E and the
boiler has an anomaly that cannot be reset.
The display background flashes (Fig. 3.4).
Fig. 3.4
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).
In this case and in case of per-
sistent lock-out call a compe-
tent and responsible Service
Engineer.
symbol, the