Display
fault
code
Const.
Weath.-
comp.
System char-
acteristics
Cause
Remedy
bF
X
Control mode
Incorrect
LON com-
munication
module
Replace the LON
communication
module.
C2
X
X
Control mode
Communica-
tion fault -
solar control
unit
Check connec-
tions and coding
address "54".
C5
X
X
Control mode,
max. pump
speed
Communica-
tion error
–
variable
speed inter-
nal pump
Check coding ad-
dress "30" set-
tings; check the
DIP switch set-
tings in the pump
wiring box:
Switch 1: OFF
(delivered condi-
tion)
Switch 2: OFF
(delivered condi-
tion)
C6
X
Control mode,
max. pump
speed
Communica-
tion fault -
variable
speed circu-
lation pump,
heating
circuit M2
Check coding ad-
dress "E5" set-
tings; check the
DIP switch set-
tings in the pump
wiring box:
Switch 1: OFF
Switch 2: ON
C7
X
X
Control mode,
max. pump
speed
Communica-
tion fault -
external vari-
able speed
circulation
pump, heat-
ing circuit A1
Check coding ad-
dress "E5" set-
tings; check the
DIP switch set-
tings in the pump
wiring box:
Switch 1: ON
Switch 2: OFF
Cd
X
X
Control mode
Communica-
tion fault
Vitocom 100
(KM BUS)
Check connec-
tions and the
Vitocom 100.
Fault codes
(cont.)
78
Troubleshooting
5692
569
GB
Содержание Vitodens 300
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