Yes, it freezes the Apexi logo. So I can throw away the controller?Does it freeze on the A'Pexi logo, or does it not power up at all?
It's not an uncommon problem when people have tried to mix and match older PFC units with newer hand controllers. - The FCC3 hand controller is for newer units (generation 3), but you probably need a FCC NT (for early "Nissan") or possibly FCC FN (second generation "Nissan").
How can I check whether I need a NT or FN?You can see if you can source an earlier controller from somewhere. - The one you've got is probably more universal, so could probably be on-sold to someone with a more recent ECU.