Viessmann 7450156 Backup Battery Replacement

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Viessmann 7450156 Backup Battery Replacement, Remove the PCB: crwdns2935265:00crwdnd2935265:01crwdnd2935265:02crwdne2935265:0

Viessmann 7450156 Backup Battery Replacement, Remove the PCB: crwdns2935265:00crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

Remove the PCB

Release the first two clips holding the PCB inside the housing.
Release the last two clips holding the PCB inside the housing.
Remove the PCB from the housing.
The last two clips might be a bit hard to release, though take care to not use too much force and break them.

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