Viessmann Vitodens 222-F B2TA Installation And Service Instructions Manual page 127

Fault codes
(cont.)
Dis- Const.
played
fault
code
bE
bF
C1 X
C3 X
C4 X
C5 X
Weath.- System char-
comp. acteristics
X Control mode
without remote
control
X Control mode
X Control mode
X Control mode
X Control mode
X Control mode,
max. pump
speed
Troubleshooting
Cause Measures
Communica- Check connec-
tion error, re- tions, cable, coding
mote control address "A0" in
Vitotrol heat- group "Heating
ing circuit 3 circuit..."/5 and re-
(with mixer) mote control con-
figuration (see
page 166).
For wireless re-
mote controls:
Check connec-
tions, place remote
control unit close to
the boiler
Incorrect Replace LON com-
LON commu- munication module
nication mod-
ule
Communica- Check connec-
tion error, ex- tions
tension EA1 Without exten-
sion EA1:
Set code "5b:0" in
group "General"/1
Communica- Check connec-
tion error, ex- tions
tension AM1 Without extension
AM1:
Set code "32:0" in
group "General"/1
Communica- Check OpenTherm
tion error, extension
OpenTherm
extension
Communica- Check coding ad-
tion error, var- dress setting "30"
iable speed in group "Boiler"/
internal pump 2
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