Viessmann BCU Notice De Montage page 10

GB
Replacing the BCU electronics module
2. Press the interlock and remove the
electronics module together with
the cables.
3. Operate the left and right locks on
the cover. Remove the cover.
4. Remove all cables from the faulty
electronics module.
5. Connect all cables to the new elec-
tronics module.
6. Attach the cover.
10
(cont.)
7. Attach the electronics module to
the retainer.
8. Pivot up the HMU electronics mod-
ule and attach the front panels.
9. Start up the heat generator accord-
ing to the further instructions in the
Service Assistant and check it is
working.
Installation and service
instructions