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Failure identification procedure
3.2
Summary
3.2.1
Appliance faults
Appliance faults
A5
A7
A8
AC
Ad
b1
C1
CC
d3
E2
E9
EA
F0
F7
FA
Fd
Table 8
14
3
X
15
3
X
17
3
X
X
X
19
3
X
X
X
20
3
X
22
2
X
X
X
24
2
X
X
X
25
3
X
X
X
26
2
X
X
X
27
2
X
X
X
28
4
X
X
X
30
4
X
X
X
32
4/
X
X
X
37
2
4
X
X
X
38
4
X
X
X
39
4
X
X
X
41
3.2.2
Faults that are not displayed
Appliance faults
Excessive burner noise, rumbling
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,...
Loose or broken contact on heat
store NTC sensor
Specified CH flow temperature
from TA... programmer exceeded
Table 9
Programmer faults
Set room temperature not
reached.
Set room temperature
exceeded.
Set room temperature not
reached.
Set room temperature
exceeded by large amount.
Excessive fluctuations in
room temperature
Temperature rises instead of
falling
Room temperature too high
in Economy mode
Incorrect or no modulation
Heat store fails to heat up
Table 10
X
X
42
X
X
43
X
X
44
X
X
46
X
X
46
X
X
47
X
48
X
X
49
X
50
X
X
50
X
X
51
X
X
50
X
X
51
X
7 181 465 346 GB (03.02)
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