The ones I've not been able to program are the 48V 2000 Flatpack 2 with grey fascia and twin fans.
It is different to yours in that it's not an HE model but it is a twin fan grey fascia model. The HE models that forum members are actively buying and are able to permanently set are the black single fan models, mostly 48V 2000HE (and the newer 48V Flatpack S 1800s).
Merlin has said your model is rare and I would agree, I've never seen a picture of that one. The only 3000HE I have seen has the black fascia.
I'm not saying it definitely won't be permanently programmable but there's is nobody saying it has been done for that model and I'm saying I couldn't program a similar model.
If you already have it then just buy a $25 CAN to USB adaptor and try it for yourself.