I used this document: PM1340GT BASIC VFD CONV-STOCK v02 3-2018.pdf to wire up my PM-1236T. The info in it is excellent, no problems with the wiring or programming of the Hitachi WJ200-015SF.
There is a lot of good info in the PM group. Even though you have the PM-1236T, the info on the PM1340GT applies, so do your searching on both machines. The above document is in the PM group, sorry but I don't remember which thread.