14
CIAO GREEN C.S.I.
Pre-heating (faster hot water):
turning the domestic hot water tempera-
ture adjustment knob to the symbol
(fig. 31) activates the pre-heating
function, the monitor indicates the
fixed
symbol. Bring the domestic hot
water temperature adjustment knob back to the required position.
This function keeps the water in the domestic hot water exchanger hot, to
reduce standby times when a request is made.
The monitor indicates the delivery temperature of the heating water or
the domestic hot water, according to the current request. During burner
ignition following a pre-heating request, the monitor indicates the flashing
symbol and the flame icon.
To deactivate the pre-heating function, rotate the domestic hot water tem-
perature adjustment knob back to the symbol. Bring the domestic hot
water temperature adjustment knob back to the required position.
This function cannot be activated when the boiler is OFF: function selector
(fig.32) to
(OFF).
Adjustment of domestic hot water temperature
To adjust the domestic hot water temperature (bathrooms, shower, kitchen,
etc.), turn the knob with the
symbol (fig. 28)
rotate clockwise to increase
the temperature and anticlockwise to reduce it.
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”,
activates the automatic temperature control system: according to the tem-
perature set on the room thermostat and the time taken to reach it, the
boiler varies automatically the heating water temperature reducing the op-
erating 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, con-
tact the Technical Assistance Service.
3a 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:
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.
4a 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.
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 overtemperature
Temporary then
definitive
Outlet/return line probe differential alarm
Definitive lockout
NTC heating return line fault
A08
Temporary stop
Heating return line probe overtempera-
ture
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 As-
sistance 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 (fig. 32) and
adjust the filling tap (
C
- fig 17) 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 do-
mestic hot water temperature, which remains set at around 50°C. Contact
the Technical Assistance Service.
Fault A07
Contact the Technical Assistance Service.
Fault 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
Contact the Technical Assistance Service.
Fault A77
This is an automatic-reset fault, if the boiler does not restart, contact the
Technical Assistance Service.
