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status and faults" chapter).
Environment Automatic Adjustment System Function (S.A.R.A.)
(fi g. 32)
The S.A.R.A. self-adjusting system is activated by positioning the heat-
ing water temperature selector in the area marked by the word AUTO:
according to the temperature set on the ambient thermostat and the
time employed to reach it, the boiler varies automatically the heating
water temperature reducing the operating time, allowing great opera-
tion comfort and energy saving.
Reset function
To restore normal operation, turn the function selector to
(fi g. 34), wait 5-6 seconds, and then turn it to the required position.
At this point, the boiler will restart automatically.
N.B. If the attempt to reset the appliance does not activate operation,
contact the Technical Assistance Service.
3A SWITCHING OFF
Temporary switch-off
In the event of absence for short periods of time, set the function selector
to
OFF (fi g.34).
In this way (leaving the electricity and fuel supplies enabled), the boiler
is protected by the following systems:
- Heating anti-freeze: this function is activated if the temperature
measured by the delivery probe drops below 5°C. In this phase, the
circulator is activated. If the boiler is not in lockout, the burner is also
activated at minimum output until the delivery water temperature
reaches 35°C.
During the anti-freeze cycle, the symbol
digital display.
- DHW anti-freeze: the function is activated if the temperature
measured by the domestic water probe drops below 5°C. In this
phase, the circulator is activated. If the boiler is not in lockout, the
burner is also activated at minimum output until the delivery water
temperature reaches 55°C.
During the anti-freeze cycle, the symbol
digital display.
- Circulator anti-blocking: an operation cycle is activated every 24 hours
after the last heat request.
Switching off for long periods
In the event of absence for long periods of time, set the function selector
to
OFF (fi g.34).
Turn the main system switch OFF.
Close the fuel and water taps of the heating and domestic hot water
system.
In this case, anti-freeze device is deactivated: empty the systems,
in case of risk of frost.
4A CHECKS
Make sure at the beginning of the heating period and during use that
the water pressure gauge indicates the pressure values with cold ap-
pliance comprised between 0.6 and 1.5 bar: this avoids system noise
levels due to the presence of air.
In case of insuffi cient water circulation, the boiler will switch off. Under
no circumstances, water pressure must be below 0.5 bar (red fi eld).
If this condition is checked, it is necessary to restore water pressure in
the boiler proceeding as follows:
- turn the function selector to
- turn on the fi lling tap (B - fi g. 22) until the pressure value is between
1 and 1.5 bar.
Carefully close the tap.
Replace the mode selector on the initial position.
If pressure drop is frequent, contact the Technical Assistance Service.
5A OPERATING STATUS AND FAULTS
The operating status of the boiler is shown on the digital display. The
types of message are listed below
Boiler status
Stand-by
OFF status
ACF alarm lockout module
ACF electronics fault alarm
12
(fig. 35) appears on the
(fig. 35) appears on the
(OFF - fi g. 34)
Display
Type of alarm
-
Signal
OFF
None
Defi nitive lockout
A01
Boiler status
Limit thermostat alarm
Air pressure switch alarm
Water pressure switch alarm
Anti-overfl ow pressure switch
alarm
Reed sensor
(if the "Condense neutralizer
tray" kit is installed)
(OFF)
NTC domestic water fault
NTC heating fault
Parasite fl ame
Temporary, pending ignition
Air pressure switch
intervention
Water pressure switch
intervention
Calibration
Preheating active function
Preheating heat request
External probe presence
Domestic water heat request
Heat request for heating
Antifreeze heat request
Flame present
Reset function
To restore operation (reset alarms):
Faults A01-02-03
Turn the function selector to
turn it to the required position.
If the reset attempts do not reactivate the boiler, request the intervention
of the Technical Assistance Centre.
Fault A04
In addition to the fault code, the digital display displays the symbol
in the following cases:
- Insufficient water pressure
Check the pressure value indicated by the water gauge:
if it is less than 0.3 bar, position the function selector on
adjust the filling tap until the pressure reaches a value between 1
and 1.5 bar.
Then turn the function selector to the required position.
If pressure drops are frequent, request the intervention of the
Technical Assistance Centre.
- Anti-overflow pressure switch
Position the mode selector on
then turn it to the required position.
If the fault persists, contact the Technical Assistance Centre.
- Full basin (if the "Condense neutralizer tray" kit is installed)
Remove the basin and empty it, following the instructions supplied
with the "Condense neutralizer tray" kit (available upon request).
Once the operations have been completed, replace the tray.
Position the mode selector on
then turn it to the required position.
If the fault persists, contact the Technical Assistance Centre.
Fault A06
The boiler functions normally but does not guarantee a constant
domestic hot water temperature, which remains set at around 50°C.
The intervention of the Technical Assistance Service is required.
Fault A07
Contact the Technical Assistance Centre.
6A REDUCED CONDENSATION FORMATION - (FIG. 33)
Positioning the adjusting DHW and CH temperature selector to the
"FCR" (reduced condensation formation) zone, the highest delivery
temperatures will be selected.
Display
Type of alarm
Defi nitive lockout
A02
Defi nitive lockout
A03
Defi nitive lockout
A04
Signal
A06
Temporary stop
A07
Temporary stop
A11
80°C
Temporary stop
fl ashing
Temporary stop
fl ashing
Temporary stop
fl ashing
Signal
ADJ
Signal
Signal
fl ashing
Signal
60°C
Signal
80°C
Signal
Signal
Signal
OFF (fig. 34), wait 5-6 seconds, then
OFF and
(OFF), wait for 5-6 seconds and
(OFF), wait for 5-6 seconds and
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