Hi all,
I am very disgusted with S4 quality. I ordered 10 psc, 6 working fine (not well) 1 miner have a lot of xx in Asic status (more than 60 xx) and 3 PSUs burnt. I am really curious how bitmain will compensate ours losses! I do not recommend S4 for buy.
I enclose pics of burnt PSUs.
http://s28.postimg.org/d0ujzek7d/First_PSU.jpg http://s29.postimg.org/mnvtdewo3/Second_PSU.jpg http://s30.postimg.org/p36j07ajh/Third_PSU.jpg

Have you powered the unit(s) with the burned psu on 220-240V or on an ~110V line?

I have powered all on 220-240V.