Viessmann VITODENS 242-F Installation And Service Instructions Manual page 130

Troubleshooting
Fault codes
(cont.)
Displayed System characteris-
fault code tics
bE Control mode without
remote control
bF Control mode
C1 Control mode
C2 Control mode
C3 Control mode
C4 Control mode
C5 Control mode, max.
pump speed
Cd Control mode
130
Cause
Communication er-
ror, remote control
Vitotrol heating cir-
cuit 3 (with mixer)
Incorrect LON
communication
module
Communication er-
ror, extension EA1
Communication er-
ror, solar control
module
Communication er-
ror, extension AM1
Communication er-
ror, OpenTherm
extension
Communication er-
ror, variable speed
internal pump
Communication er-
ror, Vitocom 100
Measures
Check connections, cable
and coding address "A0"
in group "Heating cir-
cuit", and check remote
control configuration (see
page 168).
For wireless remote con-
trols: Check connections,
place remote control unit
close to the boiler.
Replace LON communi-
cation module
Check connections
Without extension EA1:
Set code "5b:0" in the
"General" group.
Check solar control mod-
ule
Check connections
Without extension AM1:
Set code "32:0" in the
"General" group.
Check OpenTherm exten-
sion
Check coding address
setting "30" in group
"Boiler"/2
Check connections and
Vitocom 100 (see sepa-
rate installation and serv-
ice instructions).
Without Vitocom 100: Set
code "95:0" in the "Gen-
eral" group.