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Rectifying faults
4
Rectifying faults
4.1
Boiler failure codes indication
4.1.1
... on the boiler
In order to identify the specific boiler failure a two digit
alphanumeric code is used. This allows a quick fault
identification and solution.
The text display shows the message Fault EA. Please
call service, for example. At the same time, the fault
code appears on the 2-digit display, in this example: EA.
You can view an explanatory description of the fault indi-
cated by going to Settings -> Service -> Service
parameters, in this example: EA: During operation:
Flame not detected.
The failures can be divided into four basic typologies, as
described:
• The appliance continues to work at a minimum func-
tion level (e. g. with error codes A5, A7, A8, AC, Ad,
CC, FC).
• The appliance is locked until the failure is repaired
(e. g. with error codes (b1, C1, d1, d3, E2, F0)).
• The appliance is locked, until the ON/OFF switch is
turned (A1).
• The boiler has shut down and locked out (
and remains so until the cause of the fault has been
eliminated and the lock-out cancelled (e.g. E9, EA,
F0, F7, FA,Fd).
To unblock the appliance:
i
B Press the unblock button
digit – – appears on the display.
Once the appliance starts up success-
fully, the fault disappears from the text
display.
4.1.2
... on the programmer (optional accessory)
A TW 2 remote control unit can also be connected to
the text display module.
If other/more functions are required, another program-
mer must be connected. Those programmers are then
controlled via the bus module BM1.
For more detailed information, refer to the installation
instructions for the boiler and the installed programmer.
Faults on this programmer are indicated by text mes-
sages on the programmer display.
Once the fault has been put right, the programmer
reverts to its normal display.
14
4.2
4.2.1
Appliance faults
A1
A5
A7
A8
Ad
b1
C1
d3
E2
E9
flashes)
EA
F0
F7
FA
until the
FC
Fd
Table 2
4.2.2
Appliance faults
Excessive burner noise, rum-
bling noises
Flue gas levels incorrect, CO
level too high
Ignition too harsh, ignition
poor
Boiler indicates P1, P2, P3 at
start-up and then restarts
with P1, ...
Table 3
Summary
Appliance faults
Faults that are not indicated on any dis-
play
X
X
17
X
18
X
X
X
19
X
X
X
20
X
X
X
21
X
X
X
22
X
X
X
23
X
X
X
24
X
X
X
25
X
X
X
26
X
X
X
28
X
X
X
32
X
X
X
33
X
X
X
34
X
X
X
35
X
X
X
35
X
X
X
36
X
X
X
37
X
X
X
38
X
X
X
36
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