Low
I.59 on Viessmann Vitodens 200-W B2HF System

Your boiler has simply reset its internal settings back to their factory defaults and is providing a status update.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Parameters have been restored

From this model's manual
Verified against the Viessmann Vitodens 200 W B2hf System installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check the display for any other flashing red symbols or codes.Verify that your heating and hot water are still operating at your preferred temperatures.Press the 'OK' or 'Menu' button to acknowledge and clear the notification from the screen.

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