Viessmann Vitoligno 250-S Installation And Service Instructions For Contractors page 50

Diagnosis and service scans
Diagnosis
(cont.)
"Status"
"Sensor 1"
"Sensor 2"
"Mixer"
"Hardware index"
"Software index"
"Software version"
Calling up operating conditions and sensors
Via the information menu of the extended menu and in
the service menu (diagnosis and boiler sub-menus)
you can call up operating states and scan sensors.
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