Viessmann VITODENS 200-W Installation And Service Instructions Manual page 102

Troubleshooting
Fault messages
(cont.)
Displayed fault System characteristics
code
D5 Burner in a fault state
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
E0 Control mode
102
Cause
Fan blocked
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 1 (without mixer)
Short circuit, room tem-
perature sensor, heating
circuit 2 (with mixer)
Short circuit, room tem-
perature sensor, heating
circuit 3 (with mixer)
Lead break, room temper-
ature sensor, heating cir-
cuit 1 (without mixer)
Lead break, room temper-
ature sensor, heating cir-
cuit 2 (with mixer)
Lead break, room temper-
ature sensor, heating cir-
cuit 3 (with mixer)
External LON subscriber
error
Measures
Press reset button R.
Check free movement of the impel-
ler. Replace the fan unit if required.
Remedy fault at appliance con-
cerned.
Remedy fault at appliance con-
cerned.
Remedy fault at appliance con-
cerned.
Check room temperature sensor,
heating circuit 1.
External room temperature sensor
for Vitotrol 300 or integrated sensor
for Vitotrol 200/300
Check room temperature sensor,
heating circuit 2.
External room temperature sensor
for Vitotrol 300 or integrated sensor
for Vitotrol 200/300
Check room temperature sensor,
heating circuit 3.
External room temperature sensor
for Vitotrol 300 or integrated sensor
for Vitotrol 200/300
Check room temperature sensor,
heating circuit 1 and remote control
settings (see page 151).
External room temperature sensor
for Vitotrol 300 or integrated sensor
for Vitotrol 200/300
Check room temperature sensor,
heating circuit 2 and remote control
settings (see page 151).
External room temperature sensor
for Vitotrol 300 or integrated sensor
for Vitotrol 200/300
Check room temperature sensor,
heating circuit 3 and remote control
settings (see page 151).
External room temperature sensor
for Vitotrol 300 or integrated sensor
for Vitotrol 200/300
Check connections and LON sub-
scribers.