16
The boiler control box is equipped with a microprocessor that memorises and signals any faults or shutdowns.
The fault type is indicated by a flashing code.
The meaning of each code is given in the table below:
FAULT CODE
Open the gas tap, press the ON button. The burner will ignite automatically (the heating and hot water
functions are set by the manufacturers).
Should the unit fail to ignite there will be another three ignition attempts after which there will be a shutdown
(the display will flash
2
-
02
). Press RESET: if the unit still fails to ignite contact the technical assistance service.
IGNITION
1
st
Figure
Fault
2
nd
Figure
0
1
2
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
5
5
5
00
01
02
03
04
05
06
07
10
11
13
14
15
16
17
24
26
30
31
32
36
37
41
42
44
60
08
28
29
Flame detection circuit fault
24 V short circuit
No detection, no flame on burner
Board fault
Internal board fault (e.g. power failure)
Board fault
Board fault
Board fault
Board fault
Board fault
Board fault
Board fault
Board fault
Board fault
Board fault
NTC1/NTC2 connection switched over
Minimum gas pressure (at pressure switch)
Difference
∆
T between T1 and T2 exceeded (>35
°
C)
NTC1 short circuit
NTC2 short circuit
NTC1 open
NTC2 open
Board fault
Board fault
Board fault
Board fault
Air pressure switch failure
Fan not working, no tachometer signal
Fan continues running, erroneous tachometer signal
