Viessmann Vitovalor 300-P Installation And Service Instructions For Contractors page 118

Troubleshooting
Fault codes for gas condensing module
Fault code dis- System characteristics
played
bC Control mode without remote
control
bd Control mode without remote
control
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
C7 Control mode, max. pump
speed
Cd Control mode
118
(cont.)
Cause
Communication error,
Vitotrol remote control,
heating circuit 1 (without
mixer)
Communication error,
Vitotrol remote control,
heating circuit 2 (with mix-
er)
Communication error,
Vitotrol remote control,
heating circuit 3 (with mix-
er)
Incorrect LON communi-
cation module
Communication error, EA1
extension
Communication error, so-
lar control module
Communication error,
AM1 extension
Communication error,
OpenTherm extension
Communication error, in-
ternal variable speed
pump
Communication error, ex-
ternal variable speed
heating circuit pump, heat-
ing circuit 1 (without mix-
er)
Communication error,
Vitocom 100, type GSM
Measures
Check connections, cable and cod-
ing address "A0" in group "Heat-
ing circuit ...", and check remote
control configuration (see
page 175).
For wireless remote controls:
Check connection, place remote
control close to the boiler.
Check connections, cable and cod-
ing address "A0" in group "Heat-
ing circuit ...", and check remote
control configuration (see
page 175).
For wireless remote controls:
Check connection, place remote
control close to the boiler.
Check connections, cable and cod-
ing address "A0" in group "Heat-
ing circuit ...", and check remote
control configuration (see
page 175).
For wireless remote controls:
Check connection, place remote
control close to the boiler.
Replace LON communication mod-
ule.
Check connections.
Without extension EA1:
Set code "5b:0" in "General"
group.
Check solar control module.
Check connections.
Without AM1 extension:
Set code "32:0" in "General"
group.
Check OpenTherm extension.
Check setting of coding address
"30" in the "Boiler"/2 group.
Check coding address setting "E5"
in "Heating circuit" group.
Check connections and Vitocom
100 (see separate installation and
service instructions).
Without Vitocom 100: Set code
"95:0" in "General" group.