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
OK thanks for the suggestions - will try what you suggest - but I was wondering if there was a reset button/mechanism that could be initiated to reset it after it tripped.
Bet there is but Antminer not letting on.
How hot of weather are we talking about around miner? Also what CFM fan did you try on it?
Hi There
It was unusually hot in the UK recently about 30 deg C last time I checked before it switched itself off the machine was running at about 63 deg C
I have them in the attic as I don't have a cellar - so as hot air rises.......
Have some S3's running there didn't seem bothered too much - must be the built in protection for the PSU that got triggered
Yes with having them in a attic you will have the hot air from the house rising, that is true. Not all attic's are equal. I would still try first put a decent CFM fan pushing extra air through the S4. For summer I have some pretty big fan's pushing air through some of my gear.
Some things you can do is if you have attic vent's try putting fan's where it's hottest to push air through the attic vent. Turns it from passive to a little active depending on what CFM fan you use.
If it get's really bad you might look into replacing gable fan (assuming your using one). I had a lot of gear in a area with a gable fan and switched to http://www.homedepot.com/p/QuietCool-Professional-3013-CFM-Power-Gable-Mount-Attic-Fan-AFG-PRO-3-0/206047381 did a lot better at exhaust with all the extra power.