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In this way (leaving the electricity and fuel supplies enabled), the
boiler is protected by the following systems:
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when the temperature of the water in the boiler drops
below 5°C the circulator starts and, if necessary, the burner at
minimum output to being the water temperature to safety values
(35°C). During the antifreeze cycle, the symbol
appears on the
digital display.
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an operation cycle is activated every
24 h.
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If the boiler is not used for a long period, carry out the following
operations:
- turn the mode selector to
OFF
- turn the main system switch to “OFF”.
- close the fuel and water taps of the heating and domestic hot
water system
9
In this case, the anti-freeze and anti-blocking systems are
deactivated. Drain the heating and domestic water system if
there is any risk of freezing.
9
The Technical Assistance Centre is at your disposal if you
have any problems carrying out this procedure.
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The operating status of the boiler is shown on the digital display,
below is a list of the types of displays.
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Off status (OFF)
OFF
None
Stand-by
-
Signal
ACF alarm lockout module
A01
Definitive
lockout
ACF electronics fault alarm
Fumes exhaust - air intake
obstruction alarm
Limit thermostat alarm
A02
Definitive
lockout
Tacho fan alarm
A03
Definitive
lockout
Water pressure switch alarm
A04
Definitive
lockout
NTC domestic water fault
A06
Signal
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NTC heating outlet fault
A07
Temporary
stop
Heating outlet probe
over-temperature
Temporary
then definitive
Outlet/return line probe
differential alarm
Definitive
lockout
NTC heating return line fault
A08
Temporary
stop
Heating return line probe
over-temperature
Temporary
then definitive
Outlet/return line probe
differential alarm
Definitive
lockout
Cleaning the primary
heat exchanger
A09
Signal
NTC flue gases fault
Flue gases probe over-
temperature
Definitive
lockout
Parasite flame
A11
Temporary
stop
Low temperature system
thermostat alarm
A77
Temporary
stop
Temporary pending ignition
80
°C
flashing
Temporary
stop
Water pressure switch
intervention
flashing
Temporary
stop
Calibration service
ADJ
Signal
Calibration installer
Chimney sweep
ACO
Signal
Vent cycle
Signal
External probe presence
Signal
Domestic water heat request
60
°C
Signal
Heating heat request
80
°C
Signal
Antifreeze heat request
Signal
Flame present
Signal
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To restore operation (reset alarms):
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Turn the mode selector to
OFF, wait 5-6 seconds, then return
the selector to the required position.
If the reset attempts do not reactivate the boiler, request the
intervention of the Technical Assistance Centre.
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In addition to the fault code, the digital display displays the symbol
.
Check the pressure value indicated by the water gauge:
if it is less than 0.3 bar, position the function selector on
OFF
and adjust the filling tap until the pressure reaches a value between
1 and 1.5 bar.
