77u is the top terminal switch 77n is the bottom terminal switch so u on at the top and n on at the bottom if both are on thats the problem 77d does not exist 77 s should be on all the time as it is not used on ecos is it in a group and if its your buddy is he fixing it and the next time the power cycles is that when it breaks again as if you change parameters they don't take effect till the power is cycled with no fault need more information it almost sounds like it is on hatch access as it will act as if it is on normal and you cant run it from machine room did you try runing it off of the cartop when it is locked up like this. the kone 1 key is the stop switch and access enable witch is hatch access and building turns it sometimes on my jobs thats my best guess without more info
