Viessmann Vitodens 200 Service Manual page 79

Checking and acknowledging faults
Fault code Const.
in the dis-
play
C6
C7 X
Cd X
CE X
CF
dA
db
Weat- System
h. character-
comp. istics
X Control
mode,
max. pump
speed
X Control
mode,
max. pump
speed
X Control
mode
X Control
mode
X Control
mode
X Control
mode with-
out room
influence
X
Troubleshooting
(cont.)
Cause Remedy
Communication Check set-
fault - variable tings of cod-
speed heating cir- ing address
cuit pump, heating E5; check the
circuit M2 heating cir-
cuit pump
DIP switch
settings.
Communication Check setting
fault - variable of coding
speed heating cir- address E5;
cuit pump, heating check the
circuit A1 heating cir-
cuit pump
DIP switch
settings.
Communication Check con-
fault Vitocom 100 nections and
(KM BUS) Vitocom 100
Communication Check con-
fault - ext. exten- nections and
sion coding
address 2E
settings
Communications Replace the
fault - LON commu- LON commu-
nication module nication mod-
ule
Room temperature Check the
sensor heating cir- room tem-
cuit A1 shorted out perature sen-
sor for
heating cir-
cuit A1
Heating circuit M2 Check the
room temperature room tem-
sensor shorted out perature sen-
sor for
heating cir-
cuit M2
79