I wonder how they came to pick such an oddball unit. Maybe they are required to use this brand because of some European connection they have.
I think they will find they will be much better off if they pick a brand that has better US service.
I worked for a Rexroth distributor in the southeast for a number of years; we sold and supported the hydraulic (classic Rexroth and BoschRexroth lines), electric (Indramat) and linear motion (Star Linear) products. Then (early 2000s) Indramat was primarily servo; there was another family of VFDs. BUT, motors were exclusively resolver commutated. They made motors for these servo systems as well.
There was domestic competition, but when our Indramat focused application engineers were involved, it was when VERY high performance was required. While I had little involvement, I was told we out-performed everyone. (Their hydraulics and electro-hydraulics were, and are, the leader; only Moog competes.)
These don't look like that calibre; however, the US support is in Charlotte NC. Facilities with both hydraulic and electric systems never complained in my presence about support being any worse than with other manufacturers.
@Jraef the manual you linked says SOME products are UL. Trying to figure what makes up what is confusing, but they at least acknowledge the requirement exists.