44
Fault
code
*1
Display
System charac-
teristics
Cause
Measure
F A7
F A7
No flame signal
during safety time;
ionisation flame
monitor reports no
flame signal
Incorrect gas type
selected
Adjust gas type
(see page 11)
F A7
F A7
No flame signal
during safety time;
ionisation flame
monitor reports no
flame signal
Gas train does not
open
Check gas train
and replace if
required
F A7
F A7
No flame signal
during safety time;
ionisation flame
monitor reports no
flame signal
I
Danger
Plug-in termi-
nals on the
burner con-
trol unit 'live'.
Check con-
nections "L
1", "N" and
earth con-
ductor.
Connections "L1"
and "N" at the
power supply ter-
minals of the con-
trol unit or burner
control unit inter-
changed
Check core alloca-
tions and alter if
required
F A7
F A7
No flame signal
during safety time;
ionisation flame
monitor reports no
flame signal
Combustion char-
acteristics not
ideal
Adjust burner (see
from page 14)
F A8
F A8
Flame extin-
guishes during
operation
Incorrect gas type
selected
Adjust gas type
(see page 11)
F A8
F A8
Flame extin-
guishes during
operation
Burner gauze
assembly faulty
Replace burner
gauze assembly if
wire gauze dam-
aged
*1
All fault codes are saved to the fault memory and the last 10 can be called up.
Troubleshooting
Diagnosis
(cont.)
5692 908 GB