125
Dis-
played
fault
code
Const.
Weath.-
comp.
System char-
acteristics
Cause
Measures
b0
X
X
Burner blocked Short circuit,
flue gas tem-
perature sen-
sor
Check the flue gas
temperature sen-
sor (see
page 144)
b1
X
X
Control mode
as per deliv-
ered condition
Communica-
tion error,
programming
unit
Check connections
and replace pro-
gramming unit if re-
quired
b4
X
X
Controls as if
the outside
temperature
were 0 °C
Internal fault
Replace the control
unit
b5
X
X
Control mode
as per deliv-
ered condition
Internal fault
Replace the control
unit
b7
X
X
Burner blocked Boiler coding
card faulty
Plug in or replace
boiler coding card
b8
X
X
Burner blocked Lead break,
flue gas tem-
perature sen-
sor
Check the flue gas
temperature sen-
sor (see
page 144)
bA
X
Mixer regulates
to 20 °C flow
temperature
Communica-
tion error, ex-
tension kit for
heating circuit
2 (with mixer)
Check the exten-
sion kit connec-
tions and coding
bb
X
Mixer regulates
to 20 °C flow
temperature
Communica-
tion error, ex-
tension kit for
heating circuit
3 (with mixer)
Check the exten-
sion kit connec-
tions and coding
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...
Page 194: ...194 5773 216 GB...
Page 195: ...195 5773 216 GB...