Your boiler has detected that a specific accessory or additional part has been connected and needs to be set up through the control panel.

Hydraulic configuration at the boiler activated

What causes this fault?

This code occurs when the boiler detects that a new internal component or external hydraulic accessory has been electrically connected but not yet configured in the software. It is essentially the boiler asking for permission to use a new part it has identified on its system. This typically happens during the initial installation or after a control board has been replaced.