Davej,
I have the same pdf from Danfoss. Great information but it wasn't much help with this problem. The 60 cycle replacement for the US was a physical clone of the original. All tubes and the fusite conection are identical. This has been checked.

How do you know it's running backwards?
That is to say, before I tore out my last hair, I removed the compressor from the the suction and discharge lines but left it in the electrical circut. I started the compressor open to atmospere and the suction line ( the larger dia.of the two copper connections and located above the smaller dia. discharge line.)was blowing. I expected to feel it suck. The discharge line was sucking but it was weak.

I have been on the phone with Danfoss and thier Engineers are scratching heads trying to figure this out. It'll be reterned to them but I'd sure like to cut it open myself. Anyone know if you could use a plasma cutter on one?

Keep the cards and letters comming boys and girls
Thanks , Ken