Viessmann VITODENS 200-W Service Instructions Manual page 101

Fault codes
(cont.)
Dis- Const. Weath.-
played comp.
fault
code
bd X
bE X
bF X
C1 X X
C2 X X
C3 X X
C4 X X
C5 X X
System char- Cause
acteristics
Control mode Communica-
without remote tion error,
control remote con-
trol Vitotrol
heating circuit
2 (with mixer)
Control mode Communica-
without remote tion error,
control remote con-
trol Vitotrol
heating circuit
3 (with mixer)
Control mode Incorrect
LON commu-
nication mod-
ule
Control mode Communica-
tion error
extension
EA1
Control mode Communica-
tion error,
solar control
module or
Vitosolic
Control mode Extension
AM1 commu-
nication error
Control mode Communica-
tion error,
Open Therm
extension
Control mode, Communica-
max. pump tion error, var-
speed iable speed
internal pump
Troubleshooting
Measures
Check connec-
tions, lead, coding
address "A0" and
remote control set-
tings (see
page 132)
Check connec-
tions, lead, coding
address "A0" and
remote control set-
tings (see
page 132)
Replace the LON
communication
module
Check electrical
connections
Check solar control
module or
Vitosolic
Check electrical
connections
Check Open
Therm extension
Check the setting
of coding address
"30"
101