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hot water system temperature, the icon to indicate the hot water
supply and the flame icon. The boiler will be in function until the
adjusted temperature is reached, afterwards it will be in "standby"
again.
Environment
Automatic
(S.A.R.A.) fig. 6a
By setting the heating water temperature selector to the area
marked by AUTO - temperature value from 55 to 65°C - the
S.A.R.A. self-adjusting system is activated: the boiler varies the
delivery temperature according to the closing signal of the room
thermostat. When the temperature set with the heating water
temperature selector is reached, a 20 minutes count begins. If
during this period the room thermostat still requests heat, the value
of the set temperature automatically increases by 5 °C.
When the new value is reached, other 20 minutes count begins.
If during this period the room thermostat still requests heat, the
value of the set temperature automatically increases by 5 °C.
This new temperature value is the result of the temperature set
manually with the heating water temperature selector and the
increase of +10 °C of the S.A.R.A function. After the second cycle
the temperature value should be kept at the set value +10°C until
the request of the room thermostat is satisfied.
4.3 Switching off
Temporary switching off
In case of absence for short periods of time, set the mode selector
(3 - fig. 1a) to
(OFF) (fig. 2a).
In this way (leaving the electricity and fuel supplies enabled), the
boiler is protected by the following systems:
- Anti-frost device: when the temperature of the water in the
boiler falls below 5°C, the circulator and, if necessary, the
burner are activated at minimum output levels to bring the water
temperature back to the values for safety (35°C). During the anti-
frost cycle, the symbol
- Circulator anti-blocking function: an operation cycle is
activated every 24 hours.
Long period switching off
In case of absence for long periods of time, set the mode selector
(3 - fig. 1a) to
(OFF) (fig. 2a).
Then, close the gas tap present on the system. In this case, anti-frost
device is deactivated: empty the systems, in case of risk of frost.
4.4 Light signals and faults
The operating status of the boiler is shown on the digital display,
below is a list of the types of displays.
To restore operation (deactivate alarms):
Faults A 01-02-03
Position the function selector to
set it to the required position
mode). If the reset attempts do not reactivate the boiler, contact the
Technical Assistance Centre.
Fault A 04
In addition to the fault code, the digital display shows the symbol
Check the pressure value indicated by the water gauge:
if it is less than 0.3 bar, position the function selector to
and adjust the filling tap (I - fig. 14) until the pressure reaches a
value between 1 and 1.5 bar.
Then position the mode selector to the desired position
(summer) or
(winter).
If pressure drops are frequent, request the intervention of the
Technical Assistance Service.
Fault A 06
The boiler operates normally but cannot reliably maintain a
constant domestic hot water temperature, which remains set at
around 50°C. Contact the Technical Assistance Centre.
Fault A 07
Contact the Technical Assistance Centre.
Fault A 08
Contact the Technical Assistance Centre.
Fault A 09
Position the function selector to
set it to the required position
mode). If the reset attempts do not reactivate the boiler, request the
intervention of the Technical Assistance Service.
8
Adjustment
System
appears on the digital monitor.
(OFF), wait 5-6 seconds then
(summer mode) or
(OFF), wait 5-6 seconds then
(summer mode) or
Fault A 09
The boiler is equipped with an auto-diagnostic system which,
based on the total number of hours in certain operating conditions,
can signal the need to clean the primary exchanger (alarm code 09
and flue gas meter >2,500).
Function
Once the cleaning operation has been completed, using the special
kit supplied as an accessory, the total hour meter will need to be
reset to zero as follows:
- switch off the power supply
- remove the shell
- turning the instrument panel towards you
- unscrew the two screws of the small cover on the electronic
board to have access to the terminals
- while the boiler is powered up, using a small screwdriver included,
press the CO button (fig. 9a) for at least 4 seconds, to check the
meter has been reset, power down then power up the boiler; the
meter reading is shown on the monitor after the "-C-" sign.
Live electrical parts (230 Vac).
Note: the meter resetting procedure should be carried out after
each indepth cleaning of the primary exchanger or if this latter is
replaced. To check the status of the total hour meter, multiply the
reading by 100 (e.g. reading of 18 = 1,800 total hours; reading of 1
= 100 total hours). The boiler continues to operate normally even
when the alarm is activated.
BOILER STATUS
Stand-by
OFF status
ACF module lockout alarm
ACF electrical fault alarm
Limit thermostat alarm
Air pressure switch alarm
H
O pressure switch alarm
2
NTC domestic water fault
Primary (flow) thermistor fault - Primary (flow)
thermistor over temperature - Temperature differential A07
Return thermistor fault - Return thermistor
overtemperature - Temperature differential inverted
Flue thermistor or flue thermistor counter fault -
Flue thermistor over temperature
False flame
Low temperature thermostat fault
(winter
Calibration
Service operation
Transient awaiting ignition
.
H
O pressure switch intervention
2
Purge cycle mode active
(OFF)
External probe present
Domestic water heat request
Heating heat request
Anti-freeze heat request
Flame present
4.5
Boiler configuration
The electronic board contains a series of jumpers (JP4) that can be
used to configure the boiler.
To access the board, proceed as follows:
- switch off the power supply
- remove the shell
- turning the instrument panel towards you
- unscrew the two screws of the small cover on the electronic
(winter
board to have access to the terminals.
JUMPER JP7 - fig. 16:
preselection of the most suitable heating temperature adjustment
field according to the installation type.
DISPLAY
-
OFF
A01
A01
A02
A03
A04
A06
A08
A09
A11
A77
ADJ
ACO
88
°C
flashing
flashing
60
°C
80
°C
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