Viessmann · Vitodens 200-W B2HB Boiler
The boiler is in control mode but detects an issue with the LON communication module, indicating it is incorrect or faulty. This module is essential for proper communication within the system.
Click steps to track your progress.
Turn off the boiler at the main power switch and wait a few minutes before turning it back on.
Verify that the correct LON communication module is installed.
If the module is confirmed correct, it may be faulty and require replacement.
Contact a qualified service technician to diagnose and replace the LON communication module.