Nothing. I set mine up easterlies today. Switch straight on. No issues detected. Yours is likely faulty out of the box. Call for replacement. 

Item was DOA.  Had to be replaced.

That’s a real shame! When are you expecting the replacement? 

Hello,

I had this exact issue with a brand new vis nav which dyson gave me to replace a dodgy heurist as they don’t stock the heurist anymore.

I’m pretty sure the issue is firmware related.

I skipped doing the mapping as I had to go out and when I got back the app was saying there was a hardware error, I was getting battery cell overheat and robot overheated warnings. 5 restarts later and its working perfectly fine.