Quoted from Carlo:(by the way, how can switch/upgrade to english?).
You should be able to change it to english in the game menus.
Quoted from Carlo:It should move down only when the moon of Jarvin are complete, but it starts rotate as soon as I switch the pin on
That's an indication that it's rotating and can't find home,This could be a bad/flaky opto or a bad/misadjusted switch