If you are having the heat problem, the 1600W PSU from http://www.bitmaintech.com with a breakout board may perform better than the original S4 PSU, however, it also has performance temperature threshold as well. One easy solution be try to find a box fan and place it in front of your miners and increase the air movement and it may.
ERROR LED, you may unplug it, remove it from the S4 and place it in a cold place for a few hours, to make sure it is cold to the touch and try plugging it to the power cord and see if it works. (or let it sit in cold for a day unplugged and try again)
ERROR LED, you may unplug it, remove it from the S4 and place it in a cold place for a few hours, to make sure it is cold to the touch and try plugging it to the power cord and see if it works. (or let it sit in cold for a day unplugged and try again)
OK So got my PSU back after sending it to Serbia for repair (the only place in Europe) - cost a lot in postage 
Installed and got it working ok and worked fine for about a week then the same thing. Orange LED on and Red LED flashing on the back
Got back in touch with the service guys who says it is overheating protection - has been unusually hot in UK recently.
But they cannot tell me how to reset the PSU as against company policy.
Anyone know about this and how to reset the PSU?
Or is it possible to use the ones for sale on the antminer site by adapting the cable to take the older style connectors (not PCI)
thanks for any suggestions
Installed and got it working ok and worked fine for about a week then the same thing. Orange LED on and Red LED flashing on the back
Got back in touch with the service guys who says it is overheating protection - has been unusually hot in UK recently.
But they cannot tell me how to reset the PSU as against company policy.
Anyone know about this and how to reset the PSU?
Or is it possible to use the ones for sale on the antminer site by adapting the cable to take the older style connectors (not PCI)
thanks for any suggestions