Ok, i have fixed this now.
i have:
AO on mb3
AG on mb3
CM3 on mb3
NO3 on mb3 (the NO3 light on MB3 comes on during M03 S12000)
No vires are connected to VFD
I have my meter set to DC
If I do M03 S12000 in MDI I get 10 mV on my meter touching AO and AG wires
if I do M03 S24000 in MDI I get 10 mV on my meter touching AO and AG wires
If I do M05 in MDI I get 30.1 mV on my meter touching AO and AG wires
If I reverse my meter probes i get -10mV
I don't understand this, are you referring to this seting.
https://imgur.com/a/YNEDIER