Viessmann VITOPEND 200 Installation And Service Instructions Manual page 82

Troubleshooting
Fault codes
(cont.)
Display Const. Weath.‐
fault comp.
code
b4 X X
b5 X X
b7 X X
bA X
bC X
bd X
bE X
bF X
82
System char- Cause
acteristics
Regulates as Internal fault
if the outside
temperature
was 0 °C
Regulated op- Internal fault
eration as per
delivered con-
dition
Burner Boiler coding
blocked card
Mixer "Close" Communica-
tion fault –
extension kit
for heating
circuit M2
Regulated op- Communica-
tion fault ‐
eration without
remote control Vitotrol re-
mote control,
heating cir-
cuit A1
Regulated op- Communica-
tion fault ‐
eration without
remote control Vitotrol re-
mote control,
heating cir-
cuit M2
Regulated op- Vitotrol re-
eration mote control
incorrectly
encoded
Regulated op- Incorrect
eration LON com-
munication
module
Remedy
Replace control
unit
Replace the con-
trol unit
Plug in boiler cod-
ing card or re-
place, if faulty
Check the exten-
sion kit connec-
tions and coding;
start the exten-
sion kit
Check connec-
tions, cable/lead
and coding ad-
dress "A0"
Check connec-
tions, cable/lead
and coding ad-
dress "A0"
Check remote
control DIP switch
setting (see
page 110)
Replace the LON
communication
module