Viessmann · Vitodens 200-W B2HB Boiler
The burner is in a fault mode due to a damaged or incorrect boiler coding card or an issue with the main Printed Circuit Board (PCB).
Click steps to track your progress.
Press the reset button 'R' on the boiler.
Carefully remove and re-insert the boiler coding card, ensuring it is correctly seated.
If the fault persists, contact a qualified heating technician to check or replace the boiler coding card or the control unit (main PCB).