10
CIAO GREEN C.S.I.
The boiler is standby status until, after a heat request, the burner switches
on. The boiler continues to operate until the temperatures set on the boiler
are reached, or the heat request is met; after which it goes back on standby.
If the
symbol (fig. 34) on the control panel lights up, this means the
boiler is in temporary shutdown status (see the chapter on “Light signals
and faults”). The digital monitor indicates the fault code detected (fig. 34).
Automatic Temperature Control System function (S.A.R.A.) fig. 35
Setting the heating water temperature selector to the area marked “AUTO”
(temperature range 55 to 65°C),
activates the automatic temperature
control system: according to the temperature set on the room thermostat
and the time taken to reach it, the boiler varies automatically the heating
water temperature reducing the operating time, allowing greater ease of
operation and energy saving.
Reset function
To restore operation, set the function selector to
(fig. 32), wait 5-6 seconds
then set the function selector to the required position.
N.B.
If the attempt to reset the appliance does not activate operation,
contact the Technical Assistance Service.
4.2 Switching off
Temporary switch-off
In case of absence for short periods of time, set the mode selector (fig.
32) to
(OFF).
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
(fig. 36) appears
on the digital monitor.
Circulator anti-blocking function:
an operation cycle is activated every
24 hours.
Switching off for long periods
In case of absence for long periods of time, set the mode selector (fig. 32) to
(OFF). Turn the main system switch OFF. Close the fuel and water taps
of the heating and domestic hot water system. In this case, anti-frost device
is deactivated: drain the systems, in case of risk of frost.
4.3 Light signals and faults
BOILER STATUS
DISPLAY TYPES OF ALARMS
Off status (OFF)
OFF
None
Stand-by
-
Signal
ACF alarm lockout module
A01
Definitive lockout
ACF electronics fault alarm
Fumes exhaust - air intake
obstruction
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
NTC heating outlet fault
A07
Temporary stop
Heating outlet probe overtempera-
ture
Temporary then
definitive
Outlet/return line probe differential
alarm
Definitive lockout
NTC heating return line fault
A08
Temporary stop
Heating return line probe overtem-
perature
Temporary then
definitive
Outlet/return line probe differential
alarm
Definitive lockout
Cleaning the primary heat exchanger
A09
Signal
NTC flue gases fault
Temporary stop
Flue gases probe overtemperature
Definitive lockout
False 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
Preheating active function
Signal
Preheating heat request
flashing
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
To restore operation (deactivate alarms):
Faults A 01-02-03
Position the function selector to
(OFF), wait 5-6 seconds then set it to
the required position
(summer mode) or
(winter mode).
If the reset attempts do not reactivate the boiler, contact the Technical
Assistance Service.
Fault A04
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 (summer) or
(winter). 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 A06
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 Service.
Fault A07
-
A08
Contact the Technical Assistance Service.
Fault A09
Position the function selector to (OFF), wait 5-6 seconds then set it to
the required position (summer mode) or (winter mode). If the reset attempts
do not reactivate the boiler, request the intervention of the Technical
Assistance Service.
Fault A09
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 (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. 16)
- while the boiler is powered up, using a small screwdriver included, press
the CO button (fig. 26) 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.
b
Live electrical parts.
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 Service.
4.4 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. 14)
- loosen the screws (
F
- fig. 16) to remove the cover of the terminal board
(230V).
JUMPER JP7 - fig. 38:
preselection of the most suitable heating temperature adjustment field
according to the installation type.
Jumper not inserted - standard installation
Standa
rd installation 40-80°C
Jumper inserted - floor installation
Floor installation 20-45°C.
