Viessmann · Vitodens 200-W Boilers
The burner is in a fault state because the fan speed is too low, which can impact proper combustion and flue gas removal. This might be due to blockages or incorrect settings.
Click steps to track your progress.
Reset the appliance.
Contact a qualified technician to check the fan for blockages.
A technician should also verify the gas type and flue system settings in the commissioning assistant.