Viessmann VITOPEND 200 - Page 83

Fault
code
on the
display
Const. Weath.-
comp.
System char-
acteristics
Cause Measures
bd X Control mode
without remote
control
Communica-
tion fault -
Vitotrol re-
mote control,
heating cir-
cuit M2
Check connec-
tions, cable/lead
and coding ad-
dress "A0"
bE X Control mode Vitotrol re-
mote control
incorrectly
programmed
Check remote
control DIP switch
setting (see
page 110)
bF X Control mode Incorrect
LON com-
munication
module
Replace the LON
communication
module
C6 X Control mode,
max. pump
speed
Communica-
tion fault -
external vari-
able speed
heating cir-
cuit pump,
heating
circuit M2
Check coding ad-
dress "E5" set-
tings; check the
DIP switch set-
tings in the pump
wiring chamber:
Switch 1: OFF,
Switch 2: ON
C7 X X Control mode,
max. pump
speed
Communica-
tion fault -
external vari-
able speed
heating cir-
cuit pump,
heating
circuit A1
Check coding ad-
dress "E5" set-
tings; check the
DIP switch set-
tings in the pump
wiring chamber:
Switch 1: ON,
Switch 2: OFF
Cd X X Control mode Communica-
tion fault
Vitocom 100
(KM BUS)
Check connec-
tions, Vitocom 100
and coding ad-
dress "95"
CE X X Control mode Communica-
tion fault -
ext. exten-
sion
Check connec-
tions and coding
address "2E"
Fault codes (cont.)
83
Troubleshooting
5862 831 GB
Service