My fault - I'v set reflection limit in material editor for drum (chrome) to 4 but I'v not changed it for doors (glass) so it was still 1.
I think that that limit is reached when ray "hits" front of glass doors, so none reflections inside
But after tweaking it looks mutch better - this render have reflection limit set for all three reflective materials to 8 - it is bit bright but tweaking is now no problem.
Speed impact is not so tragic. This render tooks 0:41:43 while normal use of O2. If maya have all power of my system it can easily goes down under 0:30:00. Also I'm not planning to look inside "wash machine" (I can't remember right word).
Thanks guys many times