Viessmann VITODENS 200-W Service Instructions Manual page 102

Troubleshooting
Fault codes
(cont.)
Dis- Const. Weath.-
played comp.
fault
code
C6 X
C7 X X
C8 X
Cd X X
CE X X
CF X
102
System char- Cause
acteristics
Control mode, Communica-
max. pump tion error,
speed external vari-
able speed
heating circuit
pump, heat-
ing circuit 2
(with mixer)
Control mode, Communica-
max. pump tion error,
speed external vari-
able speed
heating circuit
pump, heat-
ing circuit 1
(without
mixer)
Control mode, Communica-
max. pump tion error,
speed external vari-
able speed
heating circuit
pump, heat-
ing circuit 3
(with mixer)
Control mode Communica-
tion error,
Vitocom 100
(KM BUS)
Control mode Communica-
tion error, ext.
extension
Control mode Communica-
tion error,
LON commu-
nication mod-
ule
Measures
Check setting of
coding address
"E5"
Check setting of
coding address
"E5"
Check setting of
coding address
"E5"
Check connec-
tions, Vitocom 100
and coding
address "95"
Check connections
and coding
address "2E"
Replace the LON
communication
module