Viessmann CIB User Manual

70
Fault code dis-
played
System characteristics Cause Measures
B1 Control mode as per deliv-
ered condition
Communication error, pro-
gramming unit
Check connections; replace pro-
gramming unit if necessary.
B5 Control mode as per deliv-
ered condition
Internal fault Replace control unit.
B7 Burner blocked Fault, coding card Plug in coding card or replace if
faulty.
B8 Burner blocked Lead break, flue gas tem-
perature sensor
Check flue gas temperature sen-
sor.
BA Mixer regulates to 20 °C flow
temperature.
Communication error, ex-
tension kit for heating cir-
cuit 2 (with mixer)
Check extension kit connections
and code.
BB Mixer regulates to 20 °C flow
temperature.
Communication error, ex-
tension kit for heating cir-
cuit 3 (with mixer)
Check extension kit connections
and code.
BC Control mode without remote
control
Communication error, Vi-
totrol remote control, heat-
ing circuit 1 (without mix-
er)
Check connections, cable and cod-
ing address "A0" in the "Heating
circuit" group and the remote con-
trol settings. For wireless remote
control units: Check connection;
place remote control close to the
boiler.
BD Control mode without remote
control
Communication error, Vi-
totrol remote control, heat-
ing circuit 2 (with mixer)
Check connections, cable and cod-
ing address "A0" in the "Heating
circuit" group and the remote con-
trol settings. For wireless remote
control units: Check connection;
place remote control close to the
boiler.
BE Control mode without remote
control
Communication error, Vi-
totrol remote control, heat-
ing circuit 3 (with mixer)
Check connections, cable and cod-
ing address "A0" in the "Heating
circuit" group and the remote con-
trol settings. For wireless remote
control units: Check connection;
place remote control 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.
C2 Control mode Communication error, so-
lar control module or Vito-
solic
Check solar control module or Vito-
solic.
C3 Control mode Communication error,
AM1
Check connections.
CF Control mode Communication error,
LON communication mod-
ule
Replace LON communication mod-
ule.
D6 Control mode Input DE1 at EA1 exten-
sion reports a fault.
Remedy fault at appliance con-
cerned.
D7 Control mode Input DE2 at EA1 exten-
sion reports a fault.
Remedy fault at appliance con-
cerned.
D8 Control mode Input DE3 at EA1 exten-
sion reports a fault.
Remedy fault at appliance con-
cerned.
Troubleshooting
Fault codes (cont.)
5839829
Diagnosis

Viessmann CIB Specifications

General

Brand	Viessmann
Model	CIB
Category	Boiler
Language	English