135
Dis-
played
fault
code
Const.
Weath.-
comp.
System char-
acteristics
Cause
Measures
F3
X
X
Burner in a fault
state
Flame signal
is already
present at
burner start
Check ionisation
electrode and con-
necting cable.
Press reset button
R
F8
X
X
Burner in a fault
state
Fuel valve
closes too
late
Check gas train.
Check both control
paths.
Press reset button
R
F9
X
X
Burner in a fault
state
Fan speed
too low during
burner start
Check fan, fan con-
necting cables and
power supply;
check fan control.
Press reset button
R
FA
X
X
Burner in a fault
state
Fan not in idle
state
Check fan, fan con-
necting cables and
fan control.
Press reset button
R
FC
X
X
Burner in a fault
state
Gas train faul-
ty, faulty mod-
ulation valve
control or flue
gas path
blocked
Check gas train.
Check flue sys-
tem.
Press reset button
R
Fd
X
X
Burner in a fault
state and addi-
tional fault b7 is
displayed
Boiler coding
card is miss-
ing
Insert the boiler
coding card.
Press reset button
R
Replace control
unit if fault persists
Troubleshooting
Fault codes
(cont.)
5773 216 GB
Service
Summary of Contents for Vitodens 222-F B2TA series
Page 12: ...12 2 5 1 4 2x 3 Installing the boiler Removing the front panels 5773 216 GB...
Page 13: ...13 1 2 SW17 Installing the boiler Siting and levelling the boiler 5773 216 GB Installation...
Page 31: ...31 4 1 5 2 2x 3 Installing the boiler Fitting the front panels 5773 216 GB Installation...
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