NH RB450 twine wrap not working

I need a good starting point and troubleshooting guide on the twine wrap for this machine. I’m new to baling as I just started last year but have been a heavy equipment tech for 20 years. My FIL has a RB 450 and as long as I’ve been around it (4ish years) the twine wrap hasn’t worked. I just started baling with it last year and the net wrap works great just no twine. We would like to start using twine if possible as we store everything in a barn.

NH RB450 twine wrap not working