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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.
Fault A 09
The boiler is equipped with an auto-diagnostic system which, ba-
sed 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).
Once the cleaning operation has been completed, using the spe-
cial 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 includ-
ed, press the CO button (fig. 8) 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 V AC).
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 = 1800 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
H2O pressure switch alarm
NTC domestic water fault (R.S.I only with external
storage heater with probe)
Primary (flow) thermistor fault - Primary (flow) thermi-
stor over temperature - Temperature differential
Return thermistor fault - Return thermistor overtem-
perature - Temperature differential inverted
Flue thermistor or flue thermistor counter fault -
Flue thermistor over temperature
False flame
Low temperature thermostat fault
Calibration
Service operation
Transient awaiting ignition
H2O pressure switch intervention
Purge cycle mode active
Preheating Function active (only C.S.I.)
Preheating heat request (only C.S.I.)
External probe present
Domestic water heat request
Heating heat request
Anti-freeze heat request
Flame present
10
(OFF), wait 5-6 seconds then
(summer mode) or
(winter
DISPLAY
-
OFF
A01
A01
A02
A03
A04
A06
A07
A08
A09
A11
A77
ADJ
ACO
88
°C
flashing
flashing
flashing
60
°C
80
°C
4.5 - Boiler configuration (fig. 19)
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
board to have access to the terminals
JUMPER JP7:
preselection of the most suitable heating temperature adjustment
field according to the installation type.
Jumper not inserted - standard installation
Standard installation 40-80°C
Jumper inserted - floor installation
Floor installation 20-45°C.
In the manufacturing phase, the boiler is configured for standard
installations.
JP1 Calibration (Range Rated)
JP2 Reset heating timer
JP3 Calibration (see paragraph on "Adjustments")
JP4 Absolute domestic hot water thermostat selector (C.S.I. model)
JP4 Do not use (R.S.I. model)
JP5 Do not use (C.S.I. model)
JP5 Heating only function with a predisposition for external stor-
age tank with thermostat (JP8 inserted) or probe (JP8 not in-
serted) (R.S.I. model)
JP6 Enable night-time compensation function and continuous
pump (only with external sensor connected)
JP7 Enable management of low temperature/standard installa-
tions (see above)
JP8 Do not use (C.S.I. model)
JP8 Management of an external storage tank with thermostat ena-
bled (jumper inserted)/ management of an external storage
tank with probe (jumpers not inserted) (R.S.I. model).
4.6 Setting the thermoregulation (graphs 1-2-3 fig. 20)
The thermoregulation only operates with the external sensor con-
nected; once installed, connect the external sensor (accessory avail-
able on request) to the special terminals provided on the boiler ter-
minal board.
This enables the THERMOREGULATION function.
Selecting the compensation curve
The compensation curve for heating maintains a theoretical tem-
perature of 20°C indoors, when the external temperature is be-
tween +20°C and -20°C. The choice of the curve depends on the
minimum external temperature envisaged (and therefore on the
geographical location), and on the delivery temperature envisaged
(and therefore on the type of system). It is carefully calculated by
the installer on the basis of the following formula:
envisaged delivery T. - Tshift
KT=
20- min. envisaged external T.
Tshift = 30°C standard installations
25°C floor installations
If the calculation produces an intermediate value between two
curves, you are advised to choose the compensation curve near-
est the value obtained.
Example: if the value obtained from the calculation is 1,3 this is
between curve 1 and curve 1,5. Choose the nearest curve, i.e. 1,5.
Select the KT using trimmer P3 on the board (see multiwire wiring
diagram).
To access P3:
- 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
Live electrical parts (230 V AC).
The KT values which can be set are as follows:
standard installation: 1,0-1,5-2,0-2,5-3,0
floor installation 0,2-0,4-0,6-0,8
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