Fault codes
(cont.)
Fault code
Const.
displayed
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, type GSM
type GSM
and coding address "95"
in the "General"/1 group
Communication er-
Replace LON communi-
ror, LON communi-
cation module
cation module
Input DE1 at EA1
Remove fault at appliance
extension reports a
concerned
fault
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 110)
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 110)
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 110)
External LON sub-
Check connections and
scriber error
LON subscribers
Check gap between ioni-
too high during cal-
sation electrode and burn-
ibration
er gauze assembly (see
page 44).
In open flue operation,
prevent high levels of dust
in the combustion air.
Press reset button R.
Troubleshooting
91