20
INSTALLERUSER
MAINTENANCE TECHNICIAN
2.4 USING THE BOILER.
Before ignition, make sure the heating system
is lled with water and that the manometer (7)
indicates a pressure of 1 ÷ 1.2 bar.
- Open the gas cock upstream from the boiler.
- Press the button (2) until the display switches
on, aer which press the button in sequence
(2) and take the boiler to the summer ( )
or winter ( ) position.
• Summer ( ): in this mode the boiler func-
tions only to heat the DHW, the temperature
is set via the buttons (3-4) and the relative
temperature is shown on the display via the
indicator (16).
• Winter ( ): in this mode the boiler func-
tions both for heating domestic hot water and
heating the environment. e temperature of
the DHW is always regulated via buttons (3-4),
the heating temperature is regulated via buttons
(5-6) and the relative temperature is shown on
the display via the indicator (16).
From this moment the boiler functions auto-
matically. With no demand for heat (heating or
domestic hot water production) the boiler goes to
“standby” function, equivalent to the boiler being
powered without presence of ame. Each time
the burner ignites, the relative ame present sym-
bol is displayed (10) with relative power scale.
• Operation with Comando Amico Remoto
V2
remote control (CAR
V2
) (Optional). If the
CAR
V2
is connected, the ( ) symbol will
appear on the display. e boiler regulation pa-
rameters can be set via the CAR
V2
control panel
and the reset button (1) remains active on the
boiler control panel, along with the switch-o
button (2) (“o” mode only) and the display
where the functioning state is shown.
Important: if the boiler is put into “o” mode
on the CAR
V2
the “CON” connection error
symbol will appear on the CAR
V2
. e CAR
V2
is
however powered constantly so as not to loose
memorised programs.
• Functioning with optional external probe
( ). In the case of a system with optional
external probe, the boiler ow temperature for
room central heating is managed by the exter-
nal probe depending on the external tempera-
ture measured (Par. 1.6). e ow temperature
can be modied by selecting the functioning
curve via buttons (5 and 6), selecting a value
from “0 to 9” (Fig. 1-7).
With external probe present, the relative
symbol will appear on the display (12). In the
central heating phase, if the temperature of the
water contained in the plant is sucient to heat
the radiators, the boiler can only function with
the activation of the boiler pump.
• “Stand-by” mode. Press button (2) in suc-
cession until the ( ) symbol appears. e
boiler remains active from this moment and the
anti-freeze function, pump anti-block function
and 3-way and signalling of any anomalies is
guaranteed.
N.B.: in these conditions the boiler is consid-
ered still live.
• “O” mode. By holding the button (2) down
for 8 seconds, the display switches-o and the
boiler is o completely. e safety functions are
not guaranteed in this mode.
N.B.: in these conditions the boiler is considered
still live even if there are no functions active.
• Display functioning. e display lights up
during the use of the control panel, aer 15
seconds inactivity, the brightness drops until
just the active symbols are displayed. e light-
ing mode can be varied via parameter P2 in the
circuit board customisation menu.
2.5 TROUBLESHOOTING.
e boiler signals out anomalies by ashing on
the display and relative error codes, listed on the
table, are displayed.
Anomaly signalled
code
displayed
(ashing)
No ignition block 01
Safety thermostat block
(over-temperature), ame
control anomaly
02
Fan anomaly 03
General boiler board anomaly 04
Flow probe anomaly 05
Domestic hot water probe
anomaly
06
Maximum N° of reset 08
Insucient system pressure 10
Flue pressure switch failure 11
Conguration error 15
Parasite ame 20
Push button control panel
anomaly
24
Insucient circulation 27
Loss of remote control
communication
31
Low power supply voltage 37
Loss of ame signal 38
Block due to loss of
continuous ame signal
43
Ignition block. The boiler ignites automati-
cally with each demand for room heating or hot
water production. If this does not occur within
10 seconds, the boiler goes into ignition block
(code 01). To eliminate “ignition block” the Reset
button (1) must be pressed. On commissioning
or aer extended inactivity it may be necessary
to eliminate the “ignition block”. If this phe-
nomenon occurs frequently, contact a qualied
technician for assistance (e.g. Immergas Aer-
Sales Technical Assistance Service).
Overtemperature thermostat block. During
normal functioning, if a fault causes excessive
overheating internally, the boiler goes into over-
temperature block (code 02). Aer allowing to
cool, eliminate the “overtemperature block” by
pressing the Reset key (1). If this phenomenon
occurs frequently, contact a qualied technician
for assistance (e.g. Immergas Aer-Sales Techni-
cal Assistance Service).
Fan anomaly. is occurs if the fan is blocked
or if the intake or drain pipes are obstructed. If
normal conditions are restored the boiler restarts
without having to be reset. If this anomaly per-
sists, contact a qualied technician for assistance
(e.g. Immergas Aer-Sales Technical Assistance
Service).
General boiler board anomaly. is takes place
if the boiler board microprocessor erroneously
recognises a signal (code 04). To eliminate
the “generic boiler board anomaly block”, it is
necessary to press the Reset button (1). If this
phenomenon occurs frequently, contact a qua-
lied technician for assistance (e.g. Immergas
Aer-Sales Technical Assistance Service).
Delivery probe anomaly. If the board detects
an anomaly on the delivery probe (code 05), the
boiler will not start; contact a qualied technician
for assistance (e.g. Immergas Aer-Sales Techni-
cal Assistance Service).
Domestic hot water probe anomaly. If the board
detects an anomaly on the domestic hot water
NTC probe, the boiler signals the anomaly. In this
case the boiler continues to produce domestic
hot water but not with optimal performance.
Moreover, the anti-freeze function is prevented
and an authorised technician must be called (e.g.
Immergas Aer-Sales Service).
Maximum N° of reset. To eliminate any
“anomaly” the Reset button (1) must be pressed.
e Anomaly can be reset 5 times consecutively,
aer which the function in inhibited for at least
one hour. One attempt is gained every hour for
a maximum of 5 attempts.
Insucient system pressure. Water pressure
inside the heating system (code 10), sucient to
guarantee the correct functioning of the boiler,
is not detected. Check that the system pressure
is between 1÷1.2 bar.
Fumes pressure switch failure. It occurs in the
case of an error on the circuit board that gives
consent for fan start-up incorrectly or in the
case of ue-gas pressure switch fault (code 11).
If normal conditions are restored the boiler re-
starts without having to be reset. If this anomaly
persists, contact a qualied technician for as-
sistance (e.g. Immergas Aer-Sales Technical
Assistance Service).
Conguration error. If the board detects an
anomaly or incongruency on the electric wiring,
the boiler will not start. If normal conditions are
restored the boiler restarts without having to be
reset. If this anomaly persists, contact a qualied
technician for assistance (e.g. Immergas Aer-
Sales Technical Assistance Service).
Parasite ame. is occurs in case of a leak on
the detection circuit or anomaly in the ame
control unit. (code 20), try to reset the boiler.
If the anomaly continues contact a qualified
technician (e.g. Immergas Aer-Sales Technical
Assistance Service).
Push button control panel anomaly. is occurs
when the circuit board detects an anomaly on the
push button control panel. If normal conditions
are restored the boiler restarts without having
to be reset. If this anomaly persists, contact a
qualied technician for assistance (e.g. Immergas
Aer-Sales Technical Assistance Service).
Insucient circulation. is occurs if the boiler
overheats due to insucient water circulating in
the primary circuit (code 27); the causes can be:
- low circulation; check that no interception
devices are closed on the central heating circuit
and that the system is free of air (deaerated);
- pump blocked; free the pump.
If this phenomenon occurs frequently, contact a
qualied technician for assistance (e.g. Immergas
Aer-Sales Technical Assistance Service).
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