Dear,
Yesterday, we had scheduled 5 year service from Viessmaan.
As soon as your service colleague left our system started to show this error.
Error: 12F0 - Fault - F:195
Sorry but how can it be that service colleagues come for a scheduled service and leave the system with an error? I cannot understand. Why they didn't check the whole system before leaving. Now as usual Fuel cell is not working. 
Error
App data
ErrorApp dataPlease see the attached files. We will be happy that this is resolved as soon as possible.
Best,
Kiran
