
5
various correction of a value of tempera-
ture proportional calculated. The display
will be as shown in fig. 25/a.
TO SWITCH OFF THE BOILER (fig. 24)
In the case of a short absence, press the
key (
) of the controls (pos. 2). The di-
splay will be as shown in the fig. 24. In
this way, leaving the electricity and the
fuel supply connected, the boiler is pro-
tected from frost and from the pump be-
coming jammed.
If the boiler is not used for a prolonged
period, it is advisable to disconnect the
electricity supply, by switching off the
main switch of the system, and to clo-
se the gas tap and, if low temperatures
are expected, to completely empty the
hydraulic circuits to avoid pipes being
damaged by frost.
ERRORS AND SOLUTIONS
When there is a functioning anomaly, the
display shows an alarm and the blue lu-
minous bar becomes red.
Descriptions of the anomalies with the
relative alarms and solutions are given
below:
– ALARM 02 (fig. 27/a)
If the water pressure detected is lower
than 0.5 bar, the boiler will stop and
the display will show “ALL 02”. Using
the external filling device, repressuri-
se the heating system until the pres-
sure indicated by transducer is betwe-
en 1 and 1.5 bar.
If it is necessary to repeat the system
refilling procedure, it is advisable to
contact qualified technical personnel
to check the soundness of the heating
system (to check whether there are
any leaks).
Apre
22
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig. 27/a
– ALL 03
Request assistance from qualified
technical personnel.
– ALL 05
Request assistance from qualified
technical personnel.
– ALL 06 (fig. 27/c)
Press the key
f the controls (2) to
re-start the boiler.
If the error persists, request assi-
stance from qualified technical per-
sonnel.
Apre
22
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig. 27/c
– ALL 07 (fig. 27/d)
Press the key
of the controls (2)
to re-start the boiler.
If the error persists, request assi-
stance from qualified technical per-
sonnel.
Apre
22
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig. 27/d
– ALL 08, ALL 09, ALL 10
Request assistance from qualified
technical personnel.
– ALL 13 (fig. 27/e)
Press the key
of the controls (2)
to re-start the boiler.
If the error persists, request assi-
stance from qualified technical per-
sonnel.
Apre
22
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig. 27/e
– ALL 14, ALL 15
Request assistance from qualified
technical personnel.
– “
FLASHING”
If an external sensor (SE) is fitted,
should it become short circuited, this
symbol will flash on the display. Du-
ring such error the boiler will conti-
nue normal functioning.
– From ALL 20 to ALL 35
Request assistance from qualified
technical personnel.
– ALL 70 and ALL 71
These alarms appear on the CR 73
remote control display. Request as-
sistance from qualified technical per-
sonnel.
GAS CONVERSION
If it is necessary to change to a different
type of gas, request assistance only from
authorised technical personnel.
MAINTENANCE
Annual maintenance of the appliance
should be planned sufficiently in advan-
ce, requesting the assistance of autho-
rised technical personnel.
The boiler is supplied with an mains
cable which should only be replaced
with one of similar dimensions.