Viessmann VITODENS 200-W Installation And Service Instructions Manual page 118

Troubleshooting
Fault codes
(cont.)
Dis- Const.
played
fault
code
bE
bF
C1 X
C2 X
C3 X
C4 X
118
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
Cause Measures
Communica- Check connec-
tion error, re- tions, cable, coding
mote control address "A0" in
Vitotrol group "Heating
heating circuit 3 circuit" and re-
(with mixer) mote control set-
ting (see
page 156).
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 fault, ex- tions
tension EA1
Communica- Check solar control
tion error, so- module or
lar control Vitosolic
module or
Vitosolic
Communica- Check connec-
tion fault, ex- tions
tension AM1
Communica- Check OpenTherm
tion fault, extension
OpenTherm
extension