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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.
CHILLER
Cooling operating mode without requests in progress.
Boiler awaiting domestic hot water request and heat pump awaiting room cooling.
DHW ON
Domestic hot water mode in progress.
Boiler functioning, domestic hot water heating in progress.
CH ON
Central heating mode in progress.
Boiler or heat pump in operation, room heating is in progress.
COOLING
Cooling mode in progress.
Heat pump in operation, room cooling is in progress.
F3
Antifreeze mode in progress.
Boiler functioning to restore the minimum safety temperature against boiler freezing.
CAR OFF
Remote Control off.
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 in block, the boiler works equally in central heating 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 tempera-
ture for room central heating.
SET
In presence of the external probe it replaces 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 on external probe graphics (Fig. 1-5).
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.