Fault Codes - Viessmann VITODENS 222-F Installation And Service Instructions Manual

Fault display
(cont.)
Calling up acknowledged faults
Press OK for approx. 4 s.
The 10 most recent faults (including
those remedied) are saved and can be
called up.
Calling up fault codes from the fault
memory (fault history)
The 10 most recent faults (including
those remedied) are saved and can be
scanned.

Fault codes

Fault Const. Weath.-
code on comp.
the dis-
play
0F X X
10 X X
18 X X
20 X X
Faults are sorted by date.
1. Press OK and
approx. 4 s.
2. Select " " and select fault history
with OK.
3. Select fault message with / .
System char- Cause
acteristics
Control mode Maintenance
Regulates as if Short circuit,
the outside outside tem-
temperature perature sen-
was 0 °C sor
Regulates as if Lead break,
the outside outside tem-
temperature perature sen-
was 0 °C sor
Regulates with- Short circuit,
out flow tem- system flow
perature sen- temperature
sor (low loss sensor
header)
Troubleshooting
simultaneously for
Measures
Service the appli-
ance. After servic-
ing, set coding
address "24:0".
Check the outside
temperature sen-
sor (see
page 102)
Check the outside
temperature sen-
sor (see
page 102)
Check the low loss
header sensor (see
page 104)
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