cleaning the heat exchanger or the bur-
ners, chemical products or steel bru-
shes MUST NOT BE USED.
Make sure that the tops of the burners
with the holes are free from encrusta-
tions.
– Reassemble the items removed from
the boiler, making sure to follow the cor-
rect sequence.
– Check operation of the main burner.
– After assembly of all the gas connec-
tions, these must be tested for sound-
ness, using soapy water or appropriate
products. DO NOT USE NAKED FLAMES.
– Do not use calcium chloride to treat the
plastic component during generator
maintenance.
6.4.4.1
Chimney sweep function
To check boiler combustion, press at the
same time the installer's key (
e
) for
a few seconds.
The chimney sweep function will switch on
and will continue for 15 minutes.
During the 15 minutes functioning of chim-
ney sweep function, pressing the keys (
and
) take the boiler respective at maxi-
mum (Hi) and at minimum (Lo) power.
From that moment, the boiler will start
working in heating mode at maximum
power, with cut off at 80°C and re-ignition
at 70°C.
Before activating the chimney sweep func-
tion make sure that the radiator valves or
eventual zone valves are open
.
For exit to the chimney sweep function
press the key
of the control panel.
The chimney sweep function will automa-
tically switch off after 15 minutes from
the activation.
6.4.5
ERROR MESSAGES
When there is a ERROR message, an
alarm appears on the display
and switch
on t he red led.
Descriptions of the ERRORS with relative
alarms and solutions are given below:
–
FUMES DISCHARGE ERROR
ALARM 01
(fig. 22)
The fumes thermostat has intervened. If
the condition causing the problem persi-
sts for two minutes, the boiler stops for
an enforced period of thirty minutes.
At the end of this period, the boiler re-
attempts ignition.
–
LOW WATER PRESSURE ERROR
ALARM 02
(fig. 22/a)
If the pressure detected by the water
pressure valve is lower than 0.5 bar, the
boiler stops and the display shows the
alarm “AL 02”.
Bring the pressure back to normal by
means by acting on the telescopic loa-
ding knob.
Lower the knob and turn it anti-clockwise
to open until the pressure indicated on
the pressure gauge reaches 1 - 1.2 bar.
WHEN FILLING HAS BEEN COMPLETED,
CLOSE THE KNOB BY TURNING IT
CLOCKWISE.
If the load procedure has to be repea-
ted several times, it is advisable to
check that the seal of the heating cir-
cuit is intact (check that there are no
l
eaks).
–
D.H.W. SENSOR ERROR ALARM 04
The D.H.W. probe is not operational in
these boiler models; if the display shows
the AL 04 anomaly, check PAR 2.
–
HEATING SENSOR ANOMALY ALARM 05
If one or both sensing elements of hea-
ting sensor (SM1/SM2) are open or
short circuited, the boiler will not func-
tion and the display will show the alarm
“AL 05”.
–
FLAME BLOCK ALARM 06
(fig. 22/b)
If the flame control has not detected the
presence of the flame after a complete
ignition sequence, or for any other rea-
son the card cannot “see” the flame, the
boiler will stop and the display will show
the alarm “AL 06”.
Press the key
of the controls to start
up the boiler again.
–
SA F E T Y T H E R M O S TAT E R R O R
ALARM 07
(fig. 22/c)
If the C.H. sensor (SM1/SM2) exceeds
the 100°C the boiler does not ignite the
burner, the display show AL 07 and
remains ignited the green led. If this con-
dition restored more one minute, the
boiler will stop, the display show always
the anomaly AL 07 and switch on the
red led.
Press the key
of the controls to start
up the boiler again.
–
PARASITE FLAME ERROR ALARM 08
If the flame control section recognises
the presence of flames also in phases
when they should not be present, it
Fig. 22
Fig. 22/a
Apre
0
4
1
3
2
bar
OPEN
Fig. 22/b
Fig. 22/c
Page 30 of 34
These SENSORS must not be
disabled or bypassed at any time.
In the case of repeated shutdown
of this appliance, take
appropriated action to find the
cause and remedy the problem.
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