27
DISPLAY
A
A0
01
1
A
A0
02
2
A
A0
03
3
A
A0
07
7
A
A1
19
9
A
A2
20
0
A
A2
21
1
A
A2
22
2
A
A3
33
3
A
A9
99
9
CAUSE
Too many attempts to ignite on starting up
After three attempts at ignition, no increase in DT was detected
The heating flow temperature exceeds 100°C during operation
Too many failures to flame in one period during operation
The flame was detected after the gas valve had closed
The flame was detected before the gas valve opened
The flow switch does not close
The flow switch does not open
Problem with the fan
Problem with the electronic monitoring
N
OTE
:
When there is no ignition, check that the gas cock is open.
3.8.
B
OILER
S
AFETY
S
YSTEMS
The boiler is protected from malfunctioning by means of internal checks by the P.C.B.,
which brings the boiler to a stop if necessary.
In the event of the boiler being shut off in this manner, a code appears on the display
which refers to the type of shut-off and the reason behind it.
There are two types of shut-off:
-
SAFETY SHUTDOWN: for this group of errors (characterised on the display by
the letter “
E
E
”) the situation is automatically removed as soon as the cause behind
it is resolved.
As soon as the origin of the shutdown disappears, the boiler starts up again and
returns to its normal operation.
-
SHUTDOWN: (characterised on the display by the letter “
A
A
”), is not removed
unless a manual intervention is made.
The boiler may return to operation only if reset by pressing the button “H” located
at the centre of the display.
There follows a list of the shutdown modes and the respective codes shown on the
display.
Shutdown (“
A
A
” type): if such a situation occurs, it is necessary to reset the boiler using
the appropriate key. If this shutdown occurs again, your local Service Agent should be
contacted.
Safety shutdown: In the event that a safety shutdown occurs, it is necessary to contact an
Authorised Service Centre.
DISPLAY
E
E0
01
1
E
E5
56
6
E
E6
66
6
E
E0
04
4
E
E0
05
5
E
E0
08
8
E
E2
20
0
E
E2
21
1
E
E2
22
2
E
E2
23
3
E
E6
64
4
E
E7
74
4
E
E9
99
9
CAUSE
Insufficient water pressure
Heating flow temperature probe in open circuit
Heating flow temperature probe short-circuited
Domestic hot water temperature probe in open circuit
Domestic hot water temperature probe in short circuit
Under floor heating temperature probe in open circuit
Flame detected with gas valve closed
Error in the electrical connection (live and neutral crossed)
Problem with the 50Hz power supply
Flame detection electrode short-circuited
Heating return temperature probe in open circuit
Heating return temperature probe in short circuit
Problem within the electronic system
D
AILY
T
EST
.
In order to prevent the shutdown of the components, the boiler carries out a self-
diagnosing test every 24 hours: the pump turns on for 3 seconds and the diverter valve
moves.
A
NTI
-
FROST
D
EVICE
.
The boiler is fitted with an anti-frost device consisting of three separate functions:
- Monitoring of the system flow temperature: if this temperature goes below 5°C, the
