Viessmann VITOPEND 200 Installation And Service Instructions Manual page 83

Fault codes
(cont.)
Display Const. Weath.‐
fault comp.
code
C6 X
C7 X X
Cd X X
CE X X
CF X
dA X
db X
System char- Cause
acteristics
Regulated op- Communica-
tion fault ‐
eration, max.
pump speed external vari-
able speed
heating cir-
cuit pump,
heating
circuit M2
Regulated op- Communica-
tion fault ‐
eration, max.
pump speed external vari-
able speed
heating cir-
cuit pump,
heating
circuit A1
Regulated op- Communica-
eration tion fault
Vitocom 100
(KM BUS)
Regulated op- Communica-
tion fault –
eration
ext. exten-
sion
Regulated op- Communica-
tion fault ‐
eration
LON com-
munication
module
Regulated op- Room tem-
eration without perature
room influence sensor, heat-
ing circuit A1
shorted out
Regulated op- Room tem-
eration without perature
room influence sensor, heat-
ing circuit
M2 shorted
out
Troubleshooting
Remedy
Check coding ad-
dress "E5" set-
tings; check the
DIP switch set-
tings in the pump
wiring chamber:
switch 1: OFF,
switch 2: ON
Check coding ad-
dress "E5" set-
tings; check the
DIP switch set-
tings in the pump
wiring chamber:
switch 1: ON,
switch 2: OFF
Check connec-
tions, Vitocom 100
and coding ad-
dress "95"
Check connec-
tions and coding
address "2E"
Replace the LON
communication
module
Check the room
temperature sen-
sor – heating cir-
cuit A1
Check the room
temperature sen-
sor – heating cir-
cuit M2
83