Viessmann VITOTRONIC 200 Installation And Service Instructions Manual page 64

Troubleshooting
Fault messages
(cont.)
Displayed fault System characteristics
code
C1 Control mode
C2 Control mode
Cd Control mode
CF Control mode
No communication via LON
d1 Boiler cools down.
d6 Control mode
d7 Control mode
d8 Control mode
dA Control mode without room
influence
db Control mode without room
influence
dC Control mode without room
influence
dd Control mode without room
influence
dE Control mode without room
influence
dF Control mode without room
influence
64
Cause
Communication error,
EA1 extension
Lead break, KM BUS to
solar control module or to
Vitosolic
Communication error,
Vitocom 100
Communication error,
LON communication mod-
ule of the control unit
Burner fault
Input DE1 at EA1 exten-
sion reports a fault.
Input DE2 at EA1 exten-
sion reports a fault.
Input DE3 at EA1 exten-
sion reports a fault.
Short circuit, room tem-
perature sensor, heating
circuit without mixer A1
(heating circuit 1)
Short circuit, room tem-
perature sensor, heating
circuit with mixer M2
(heating circuit 2)
Short circuit, room tem-
perature sensor, heating
circuit with mixer M3
(heating circuit 3)
Lead break, room temper-
ature sensor, heating cir-
cuit without mixer A1
(heating circuit 1)
Lead break, room temper-
ature sensor, heating cir-
cuit with mixer M2 (heat-
ing circuit 2)
Lead break, room temper-
ature sensor, heating cir-
cuit with mixer M3 (heat-
ing circuit 3)
Measures
Check connections (see
page 91).
Without EA1 extension:
Set code "35:0" in the "General"
group.
Check KM BUS cable and appli-
ance.
Without solar control unit:
Set code "54:0" in the "General"
group.
Check connections and
Vitocom 100 (see separate installa-
tion and service instructions).
Without Vitocom 100: Set code
"95:0" in the "General" group.
Check LON communication mod-
ule and replace if required.
Without LON communication mod-
ule:
Set code "76:0" in the "General"
group.
Check the burner.
Remedy fault at appliance con-
cerned.
Remedy fault at appliance con-
cerned.
Remedy fault at appliance con-
cerned.
Check room temperature sensor
(see page 84).
Check room temperature sensor
(see page 84).
Check room temperature sensor
(see page 84).
Check room temperature sensor
(see page 84) and remote control
settings (see separate installation
and service instructions).
Analogue fault code "dd"
Analogue fault code "dd"