Opener Hard Factory Reset - PIN lost

I have an issue where the PIN of an opener is lost. As the Opener is not accessible through the APP I need to find a way to hard-reset the Opener without the use of the App. Any experiences on this issue?

You don’t need the Opener in your App in order to perform a factory reset. You can reset any Nuki device to which you have physical access by choosing Menu > Help > Opener factory reset in the Nuki App.

Jürgen, thank you for your help!

Jürgen, I tried to proceed as recommended. Opener is flashing 15 times in 15 seconds but connection can not be established. Any suggestions? (IOS 15.2)

Please contact our support via the Nuki App (Menu > Help > Contact Customer Support) for further help.

Nuki App (Menu > Help > Contact Customer Support) does not work if you lost the security pin