Viessmann · Vitodens 200-W Boilers
The burner is in a fault state because the gas pressure is too low, which prevents proper combustion. This can be due to issues with your gas supply or the gas pressure switch.
Click steps to track your progress.
Reset the appliance.
Check your gas supply and ensure the main gas valve is fully open.
If the fault persists, contact your gas supply utility or a qualified technician to check the gas pressure and gas pressure switch.