Viessmann VITODENS 200-W Installation And Service Instructions Manual page 87

Fault codes
(cont.)
Displayed Const.
fault code
C4 X
C5 X
Cd X
CF
d6 X
d7 X
d8 X
dA
db
dC
dd
dE
dF
E0
Weather- System characteris-
comp. tics
X Control mode
X Control mode, max.
pump speed
X Control mode
X Control mode
X Control mode
X Control mode
X Control mode
X Control mode without
room influence
X Control mode without
room influence
X Control mode without
room influence
X Control mode without
room influence
X Control mode without
room influence
X Control mode without
room influence
X Control mode
Cause Measures
Communication er- Check OpenTherm exten-
ror, OpenTherm sion
extension
Communication er- Check pump KM-BUS
ror, variable speed
pump
Communication er- Check connections,
ror, Vitocom 100 Vitocom 100 and coding
(KM BUS) address "95" in group
"General"/1
Communication er- Replace LON communi-
ror, LON communi- cation module
cation module
Input DE1 reports Remove fault at appliance
a fault at EA1 ex- concerned
tension
Input DE2 reports Remove fault at appliance
a fault at extension concerned
EA1
Input DE3 reports Remove fault at appliance
a fault at extension concerned
EA1
Short circuit, room Check room temperature
temperature sen- sensor, heating circuit 1
sor, heating circuit
1 (without mixer)
Short circuit, room Check room temperature
temperature sen- sensor, heating circuit 2
sor, heating circuit
2 (with mixer)
Short circuit, room Check room temperature
temperature sen- sensor, heating circuit 3
sor, heating circuit
3 (with mixer)
Lead break, room Check room temperature
temperature sen- sensor, heating circuit 1
sor, heating circuit and remote control set-
1 (without mixer) tings (see page 114)
Lead break, room Check room temperature
temperature sen- sensor, heating circuit 2
sor, heating circuit and remote control set-
2 (with mixer) tings (see page 114)
Lead break, room Check room temperature
temperature sen- sensor, heating circuit 3
sor, heating circuit and remote control set-
3 (with mixer) tings (see page 114)
Fault, external LON Check connections and
subscriber LON subscribers
Troubleshooting
87