Outside Temperature; Troubleshooting Fault Display - Viessmann VITOLADENS333-F Service Instructions Manual

Troubleshooting
Fault display
(cont.)
Calling up acknowledged fault messages
Press the following keys:
1. d for approx. 3 s.
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 code System character-
on the dis- istics
play
0F Control mode
10 Regulates as if the

outside temperature

was 0 °C
18 Regulates as if the
outside temperature
was 0 °C
68
2. a/b for the acknowledged fault.
Press the following keys:
1. G + d simultaneously for
approx. 2 s.
2. a/b for individual fault
codes.
3. Note
All saved fault codes can be
deleted with e.
4. d Scanning is completed.
Cause Measures
Maintenance Service the equipment.
After the service, set
coding address "24:0".
Outside tempera- Check the outside tem-
ture sensor perature sensor (see
shorted out page 74).
Outside tempera- Check the outside tem-
ture sensor lead perature sensor (see
broken page 74).