Viessmann VITOTRONIC 100 GC1 Installation And Service Instructions Manual page 104

Troubleshooting
Diagnosis
(continued)
Retrieving fault codes from the fault memory (error history)
1 2 3 4 5 6 7
104
All faults which have occurred are stored and can be retrieved by scanning.
The scanning sequence starts with the most recently stored fault code.
1. Press and simultaneously
for approx. 2 seconds.
2. Access the individual fault codes
by pressing the or
Sequence of Fault code
stored fault
codes
1
Last (most recent)
fault code
. . . .
. .
10 Last fault code
3. Press .
Scanning of error history is
activated.
All stored fault codes can be
button.
deleted by pressing
Scanning of error history is
terminated.
.