Fault Codes - Viessmann Vitodens 200 Service Instructions Manual

Troubleshooting
Fault display
(cont.)
Calling up fault codes from the fault memory (fault history)
The 10 most recent faults are saved
and may be scanned.
The faults are ordered by date, thus
the most recent fault is fault number 1.

Fault codes

Display Const. Weath.-
fault comp.
code
0F X X
10 X
18 X
20 X
68
Press the following keys:
1. G + d simultaneously for
2. a/b
3. Note
All saved fault codes can be
deleted with e.
4. d
System char- Cause
acteristics
Control mode Maintenance Service the equip-
Regulates as Outside tem-
if the outside perature
temperature sensor
was 0 °C shorted out
Regulates as Outside tem-
if the outside perature
temperature sensor lead
was 0 °C broken
Regulates System flow
without flow temperature
temperature sensor
sensor (low shorted out
loss header)
approx. 2 s.
for individual fault
codes.
Scanning is completed.
Measures
ment. After the
service, set cod-
ing address
"24:0".
Check the outside
temperature sen-
sor (see page 78).
Check the outside
temperature sen-
sor (see page 78).
Check the low
loss header sen-
sor (see page 79).