Fault codes
(cont.)
Displayed
Const.
fault code
Cd
X
CF
d6
X
d7
X
d8
X
dA
db
dC
dd
dE
dF
E0
E1
X
Weather-
System characteris-
comp.
tics
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
X
Burner in a fault state Ionisation current
Cause
Measures
Communication er-
Check connections,
ror, Vitocom 100,
Vitocom 100 and coding
type GSM
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 at EA1
Remove fault at appliance
extension reports a
concerned
fault
Input DE3 at EA1
Remove fault at appliance
extension reports a
concerned
fault
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 119)
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 119)
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 119)
Fault, external LON
Check connections and
subscriber
LON subscribers
Check gap between ioni-
too high during cal-
sation electrode and burn-
ibration
er gauze assembly (see
page 36).
In open flue operation,
prevent high incidence of
dust in the combustion air.
Press reset button R.
Troubleshooting
85