Viessmann 7513244, Installation And Service Instructions Manual

Page: 96 / 152

96
Fault code dis-
played System characteristics Cause Measures
bd Control mode without remote
control Communication error,
Vitotrol remote control,
heating circuit 2 (with mix-
er) Check connections, cable and cod-
ing address "A0" in group
"Heat-
ing circuit" , and check remote
control configuration (see
page 123).
For wireless remote controls:
Check connection, place remote
control unit close to the boiler.
bE Control mode without remote
control Communication error,
Vitotrol remote control,
heating circuit 3 (with mix-
er) Check connections, cable and cod-
ing address "A0" in group
"Heat-
ing circuit" , and check remote
control configuration (see
page 123).
For wireless remote controls:
Check connection, place remote
control unit close to the boiler.
bF Control mode Incorrect LON communi-
cation module Replace LON communication mod-
ule
C1 Control mode Communication error, EA1
extension Check connections
Without EA1 extension:
Set code "5b:0" in
"General"
group.
C2 Control mode Communication error, so-
lar control module Check solar control module
C3 Control mode Communication error,
AM1 extension Check connections
Without AM1 extension:
Set code "32:0" in
"General"
group.
C4 Control mode Communication error,
OpenTherm extension Check OpenTherm extension
C5 Control mode, max. pump
speed Communication error, in-
ternal speed-controlled
pump Check coding address setting "30"
in group
"Boiler" / 2
Cd Control mode Communication error,
Vitocom 100 Check connections and
Vitocom 100 (see separate installa-
tion and service instructions).
Without Vitocom 100: Set code
"95:0" in
"General" group.
CF Control mode
No communication via LON. Communication error,
LON communication mod-
ule Check LON communication mod-
ule and replace if required.
If no LON communication module
is installed, set code "76:0" in
"General" group.
d6 Control mode DE1 input at EA1 exten-
sion reports a fault Remove fault at appliance con-
cerned
d7 Control mode DE2 input at EA1 exten-
sion reports a fault Remove fault at appliance con-
cerned
d8 Control mode DE3 input at EA1 exten-
sion reports a fault Remove fault at appliance con-
cerned
dA Control mode without room
influence Short circuit, room tem-
perature sensor, heating
circuit 1 (without mixer) Check room temperature sensor,
heating circuit 1
Troubleshooting
Fault codes
(cont.)
5773 238 GB
Diagnosis