Technical information

32
3.7 BOILER SAFETY SYSTEMS
T
he boiler is protected from malfunctioning by means of internal
checks by the P.C.B., which brings the boiler to a stop if necessary.
There are two types of shut-off:
•
SHUTDOWN (A)
•
SAFETY SHUTDOWN (E)
SHUTDOWN “
A
A
”
T
his type of appliance shutdown is called “non-volatile”, and is
indicated on the display by a number preceded by the letter (
A) , and
by the symbol (G F
IG. 2.20 Page 20), as illustrated in the table
b
elow:
WARNING!
The boiler is still powered.
Important
If this shutdown occurs frequently, contact an
authorised Service Centre for assistance. For safety
reasons, the boiler will allow a maximum of 5 reset
operations to take place in 15 minutes (pressing the
RESET button).
If the shutdown is occasional or an isolated event, this is
not necessarily a problem.
1
2
3
4
5
6
1
2
3
4
5
6
EC
II
D
SAFETY SHUTDOWN “E”
In the event of a saf
ety cut-off (displayed with the code shown in the
table), the boiler will automatically try to reset itself and relight.
Should this not be the case, contact an authorised Service Centre for
assistance.
1
2
3
4
5
6
1
2
3
4
5
6
EC
II
DISPLAY CAUSE
AA 0011
No flame after safety time (7 seconds)
AA 0033
The heating flow temperature exceeds 103
o
C
during operation
AA 7777
Condensate Trap full of water
Condensare sensor short circuited
Condensate sensor in open circuit
AA 9977
Problem with the electronic monitoring
AA 9988
Problem with the electronic monitoring
AA 9999
Problem with the electronic monitoring
DISPLAY CAUSE
EE 0022
Insufficient water pressure
EE 0044
Domestic hot water temperature probe in
open circuit
EE 0055
Domestic hot w
ater temperature probe
short circuited
EE 0066
Heating flow temperature probe in open
circuit
EE 0077
Heating flow temperature probe short
circuited
EE 0088
Heating return temperature probe in open
circuit
EE 0099
Heating return temperature probe short
circuited
EE 2200
Flame detected with gas valve closed
EE 2211
Error in the electrical connection (live and
neutral crossed)
EE 3333
The air pressure switch is
closed before the ignition sequence
EE 3344
The air pressure switch does not close
when the fan runs
EE 9999
More than 5 RESETS of the boiler
in 15 min
utes.