Viessmann VITODENS 200-W Service Instructions Manual page 114

Troubleshooting
Repairs
(cont.)
Checking the Vitotronic 200-H (accessories)
The Vitotronic 200-H is connected to the
control unit via the LON cable. To test the
connection, carry out a subscriber check
at the boiler control unit (see page 36).
114
2. At plug gS, swap the cores at termi-
nals "|" and "~".
3. Refit the casing cover.