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15.5
Fault / malfunction codes
If a fault/malfunction is detected during boiler operation, the
message "AL" will appear on the display followed by the fault
code (eg. "06" - no flame detected).
If the message "RESET" also appears, press and hold the but-
ton
o R
for more than 3 seconds and check that the nor-
mal operating conditions are restored.
If this operation is not successful, ONLY ONE MORE ATTEMPT
can be made, therefore:
– close the gas isolation valve
– set the main system switch to "OFF"
– contact the**nome simbolico non tradotto**.
m
CAUTION
The table with the fault codes and the corresponding
description is provided in the specific section of the
INSTALLATION AND MAINTENANCE MANUAL.
16 SHUTDOWN
16.1
Temporary shutdown
If the user wishes to interrupt boiler operation, press and
hold the button
s
for at least one second, once if in "WINTER
mode"
n
or twice if in "SUMMER mode"
on the display.
f
DANGER
The boiler will still be powered.
If the user is away temporarily, for a weekend, short trip etc
and if the outside temperature is at ZERO:
– press and hold the button
or twice if in "SUMMER mode"
stand-by
20
OFF
l
. "- -" will appear
s
once if in "WINTER mode"
l
to put the boiler into
– set the main system switch to "OFF"
– close the gas valve.
m
CAUTION
If the outside temperature might fall below ZERO,
since the appliance is equipped with an "antifreeze
function"
– ONLY PUT THE BOILER INTO STAND-BY
– leave the main system switch set to "ON" (boiler
is powered)
– leave the gas valve open.
16.2
Shutting down for long periods
If the boiler is to be left unused for a long period, the following
operations need to be carried out:
– press and hold the button
Fig. 5
"WINTER mode"
put the boiler into stand-by "- -" will appear on the display
– set the main system switch to "OFF"
– close the gas valve
– close the heating and domestic hot water isolation valves
– drain the heating and domestic hot water system if there is
the risk of freezing.
m
CAUTION
Contact the**nome simbolico non tradotto** if the
procedure described above cannot be easily carried
out.
n
OFF
s
for at least 1 second, once if in
n
or twice if in "SUMMER mode"
OFF
EN
Fig. 6
l
to
Fig. 7
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