Too funny, I haven't posted in a while and was just searching the 4KW HY units HY04D023B and I come across my old post, I just picked up 4 of these dirt cheap off FleaBay and need to convert them, and I guess I can answer my old question, They still do not put the main components in unless the unit is ordered with the Braking option.
I've already added the pot to the keypads and they work pretty slick.
anyhow I think they are pretty much all similar just components in different places... here is a Schematic for the 2.2KW it's enough to get ya going on any of the HY VFD's IMHO
I also suggest that you have access to a Torque Screwdriver for mounting the IGBT's if they are not reinstalled correctly they have a tendency to go BOOM