You will need to set the 'Sens' parameter. This setting is what determines the MAFS signal type in and out of the unit. You can change this if you are running a different type of MAFS. If you have a std MAFS, then the setting for 'Sens' will be In=5, Out=5. If you are running a Z32 MAFS it's In=2, Out=5 and if, like me, you have gone the whole hog and have a Q45 jammed in under the bonnet, it's In=1, Out=5
The rest of the setup is pretty straightforward on the S-AFC II.