Hello
i have 4 antminers s5 with 858watt psu 80% power efficiency and the problem is that after a couple of hours working properly the miners shuts down and i have to close the psu wait 10-15 minutes in order to shut them on
any ideas what might be the problem?
Since you have 4 antminers, I presume you have more than 1 PSU?
Give another PSU a shot, if it's just cutting out and you're not able to power it back on, I'd say PSU is at fault.
Worth a try?