Fault Codes - Viessmann Vitodens 333-F Service Instructions Manual

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

Fault Const. weath.-
code comp.
on the
display
0F X X
10 X
18 X
20 X X
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 Service
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)
Troubleshooting
approx. 2 s.
for individual fault
codes.
Scanning is completed.
Measures
Service the equip-
ment. After the
service, set cod-
ing address
"24:0".
Check the outside
temperature sen-
sor (see page 87)
Check the outside
temperature sen-
sor (see page 87)
Check the low
loss header sen-
sor (see page 89)
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