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INS
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MAINTEN
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CE TECHNI
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2.4 DESCRIPTION OF FUNCTIONING
STATES
Below find a list of boiler functioning states that
appear on the multifunction display (24) by
means of the indicator (6) with a brief descrip-
tion. Refer to the instruction book for a complete
explanation.
Display (6) Description of functioning states
SUMMER
Summer functioning mode without request in progress.
Boiler in stand-by for domestic hot water request.
WINTER
Winter functioning mode without request in progress.
Boiler in stand-by for domestic hot water or central heating request.
DHW ON
Domestic hot water mode in progress.
Boiler functioning, domestic hot water heating in progress.
CH ON
Central heating mode in progress.
Boiler functioning, central heating in progress.
F3
Antifreeze mode in progress.
Boiler functioning to restore the minimum safety temperature against boiler
freezing.
CAR OFF
Remote Control (Optional) off.
DHW OFF
With domestic hot water priority disabled (indicator 15 off), the boiler only
functions in room central heating mode for duration of 1 hour, however keeping
the domestic hot water at minimum temperature (20°C), after which the boiler
goes back to the normal functioning, previously set.
In the case of use with Super CAR jointly with the opertaion period in reduced
D.H.W. Timer mode, will be displayed DHW OFF and indicators 15 and 2
switch off (see Super CAR instructions manual).
F4
Postventilation in progress.
Fan in function after a request for domestic hot water or central heating in order
to evacuate residual flue gas.
F5
Postcirculation in progress.
Pump in function after a request for domestic hot water or central heating in
order to cool the primary circuit.
P33
With Remote Control (Optional) in block, the boiler still works in central heat-
ing mode. (Can be activated through the “M3” menu. It allows to activate the
central heating even if the Remote Control is out of order).
STOP
Reset attempts finished
Wait for 1 hour to re-acquire 1 attempt.
(Error code 08).
ERR xx
Anomaly present with relative error code.
The boiler does not work. (see troubleshooting paragraph).
SET
When the domestic hot water temperature selector switch is turned (1 Fig. 2-1) it
displays the control status of the domestic hot water temperature in progress.
SET
When the central heating temperature selector switch is turned (1 Fig. 2-1) it
displays the control status of the boiler flow temperature for room central heat-
ing.
SET
In the presence of the external probe (optional) replace the “SET” item.
The value that appears is the correction of the flow temperature with respect to
the functioning curve set by the external probe. See OFFSET in the graphs of the
external probe (Fig. 1-6, 1-7).
F8
System deaeration in progress.
During this phase, which lasts 18 hours, the boiler circulator pump is started at
preset intervals, thus allowing deaeration of the central heating system.
F9
Only in the case of use with Super CAR, does it allow to activate the anti-
legionella function, which takes the temperature of the water in the storage tank
to 65°C for 15 minutes. (see Super CAR instruction manual).
2.5 USING THE BOILER.
Before ignition make sure the central heating sys-
tem is filled with water and that the manometer
(23) indicates a pressure of 1 - 1.2 bar;
Open the gas cock upstream from the boiler.
With the boiler off, only the Stand-by symbol
(10) appears on the display. By pressing the (
)
button the boiler switches on.
Once the boiler is on, by pressing button “A”
repeatedly, the functioning mode changes and
switches from summer functioning mode (
) to winter functioning mode ( ).
•
Summer ( ):
in this mode the boiler func-
tions only to heat domestic hot water. The
temperature is set using the selector switch
(1) and the relative temperature is shown on
the display (24) by means of the indicator (2)
and the “SET” indication appears (Fig. 2-2). By
turning the selector switch (1) in a clockwise
direction the temperature increases and in an
anti-clockwise direction it decreases.
During domestic hot water heating, “DHW
ON” is displayed (24) on the status indicator (6)
and at the same time as the burner ignites, the
flame presence indicator switches on (8) with
the relative power scale and the indicator (9 and
7) with the instantaneous outlet temperature
from the primary heat exchanger.
• Winter ( ):
in this mode the boiler functions
both for heating domestic hot water and heating
the environment. The temperature of the DHW
is always adjusted using the selector switch (1).
-
Direct zone.
The central heating temperature
in the direct zone is adjusted using the selec-
tor switch (3), and the relative temperature
is shown on the display (24) using the indi-
cator (4) and the “SET” indication appears
(Fig. 2-4). By turning the selector switch
(3) in a clockwise direction the temperature
increases and in an anti-clockwise direction
it decreases.
Flow temperature setting
direct zone system
Summer mode operation with domestic hot
water heating
Adjustment of domestic hot water