Hooking up a variable frequency drive
European phase voltage is 230 Vrms (line voltage is therefore 400 Vrms).  Here in the US we have to connect the two "hots" to get a comparable voltage, that is 240 Vrms.

You are fine connecting one split-phase "hot" to L1 and the other one to L2.  Make sure to connect the ground as well.  The split-phase neutral should be left disconnected.