Desperate for Aircon help - advanced challenge

I’m trying to connect my AirCon to SmartThings but can’t work it out for the life of me.
I have MIM-H03N wifi kit connected to AC035RN1DKG.

Follow the SmartThings installation and it connects to wifi, finds System Air Conditioner. Then it says “No Indoor Unit Connected”. Have set Seg5 to 1 on the Indoor unit options. Where am I going wrong?

Thanks in advance