Low
181 on Atag iC28

This is a normal notification message showing your boiler is finishing its setup process and is not a fault.

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

No error: shortly visible when leaving commissioning mode

From this model's manual
Verified against the Atag Ic28 installation & service manual, page 48.
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

Wait a few seconds for the code to disappear automatically.No further action is required as the boiler is functioning correctly.

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