126
Dis-
played
fault
code
Const.
Weath.-
comp.
System char-
acteristics
Cause
Measures
bF
X
Control mode
Incorrect
LON commu-
nication mod-
ule
Replace LON com-
munication mod-
ule.
C1
X
X
Control mode
Communica-
tion fault, ex-
tension EA1
Check connec-
tions.
C2
X
X
Control mode
Communica-
tion error, so-
lar control
module or
Vitosolic
Check solar control
module or
Vitosolic.
C3
X
X
Control mode
Communica-
tion fault, ex-
tension AM1
Check connec-
tions
C4
X
X
Control mode
Communica-
tion error,
Open Therm
extension
Check Open
Therm extension.
Cd
X
X
Control mode
Communica-
tion error,
Vitocom 100
(KM BUS)
Check connec-
tions, Vitocom 100
and coding ad-
dress "95" in group
"General"
/
1
.
CF
X
Control mode
Communica-
tion error,
LON commu-
nication mod-
ule
Replace LON com-
munication module
d6
X
X
Control mode
Input DE1 re-
ports a fault at
extension
EA1
Remove fault at
appliance con-
cerned
d7
X
X
Control mode
Input DE2 re-
ports a fault at
extension
EA1
Remove fault at
appliance con-
cerned.
Troubleshooting
Fault codes
(cont.)
5623 520 GB
Содержание Series B2HA 40
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