9
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 (OFF) and adjust
the filling tap until the pressure reaches a value between 1 and 1.5 bar.
Then position the mode selector to the desired position.
The boiler will perform one purge cycle lasting approximately 2 minutes.
If pressure drops are frequent, request the intervention of the Technical
Assistance Service.
Fault A 06
Contact the Technical Assistance Centre.
Fault A 07
Contact the Technical Assistance Centre.
Fault A 08
Contact the Technical Assistance Centre.
Fault A 09 with fixed red LED lit
Position the function selector to (OFF), wait 5-6 seconds then set it to
the required position.
If the reset attempts do not reactivate the boiler, request the intervention of
the Technical Assistance Service.
Fault A 09 with flashing red and green LEDs
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 with flashing red and green
LEDs and flue gas meter >2,500).
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 housing
- loosen the fixing screw then turn the instrument panel
- loosen the fixing screws on the cover (F) to access the terminal board
(fig. 22)
- while the boiler is powered up, press and hold the CO button (fig. 37) 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 in-
depth 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.
Fault A77
This is an automatic-reset fault, if the boiler does not restart, contact the
Technical Assistance Centre.
Flashing yellow LED
Combustion analysis in progress.
4.4 Alarms record
The “ALARMS RECORD” function is automatically enabled after 2 hours
of continuous power supply to the display, or immediately if parameter P1
is set at 1.
The record contains the most recent alarms (maximum 5). They are vi-
sualised in sequence when button P1 on the display card is pressed and
released.
If the record is empty (P0=0) or the record management function is disa-
bled (P1=0), the display function is not available.
The alarms are shown in reverse (not chronological) order: this means the
last alarm generated is the first one to be visualised.
To reset the alarms record, just set parameter P0 at 0. NOTE: to access
button P1, you must remove the command panel cover and identify the
display card (fig. 47).
PROGRAMMING THE PARAMETERS
The display appearance can be personalised by programming three pa-
rameters:
Keep button P1 on the display (fig. 47) pressed for at least 10sec to activa
-
te the programming procedure. The three parameters and their respective
values will be shown cyclically on the display. To modify the value of a pa-
rameter, just press button P1 again when the required parameter appears;
keep it pressed until the value changes from 0 to 1 or vice versa (about 2
sec).
The programming procedure ends automatically after about 5 minutes, or
following a supply voltage fall.
4.5 Boiler configuration
There is a series of jumpers (JPX) available on the electronic board which
enable the boiler to be configured.
To access the board, proceed as follows:
- turn off the main switch on the system
- loosen the fixing screws on the housing, move the base of the housing
forwards and then upwards to unhook it from the chassis
- undo the fixing screws (
E
) from the instrument panel (fig. 20)
- loosen the screws (
F
- fig. 22) to remove the cover of the terminal board
(230V)
JUMPER JP7 - fig. 48a:
preselection of the most suitable heating temperature adjustment field ac
-
cording to the installation type.
Jumper not inserted - standard installation
Standard installation 40-80°C
Parameter
Default
Description
P0
0
Reset alarms record (0= record empty / 1= re-
cord not empty)
P1
0
Immediate enabling of alarms record (0= ena-
ble timed record management / 1= enable im-
mediate record management)
P2
0
Do not modify
DESCRIPTION
DISPLAY CODE
RED LED
YELLOW LED
GREEN LED
Flame lockout
A01
ON
OFF
OFF
Limit thermostat intervention
A02
flashes
OFF
OFF
Fan fault
A03
ON
OFF
OFF
Water pressure switch fault
A04
ON
OFF
ON
Domestic hot water NTC probe fault
A06
flashes
OFF
flashes
Fault on heating delivery NTC probe or delivery-return
differential circuit-breaker
A07
ON
OFF
OFF
Fault on heating return NTC probe or return-delivery dif-
ferential circuit-breaker
A08
ON
OFF
OFF
Intervention of thermal safety device on flue gas probe
A09
ON
OFF
OFF
Flue gas NTC probe or heat exchanger cleaning
A09
flashes
OFF
flashes
Intervention of low temperature thermostat - general
alarm
A77
ON
OFF
OFF
Combustion analysis procedure in progress
ACO
OFF
flashes
OFF
