Viessmann VITOTRONIC 100 GC1 Installation And Service Instructions Manual page 92

Scanning service information
Overview of Service Levels
Function
Temperatures, boiler coding
cards and scans
Relay test
Participant check
(in conjunction with LON)
Operating status information
Service display
92
Button combination
Press 9 and rw simultaneously
for approx. 2 seconds
Press 9 and OK simultaneously for
approx. 2 seconds
Press w and OK simultaneously for
approx. 2 seconds
Press
To exit
Press OK
Press OK
Press w and OK simultaneously for
approx. 1 second
Press
Press OK
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