Quote from: BitMaxz on June 19, 2018, 09:29:12 PM

Look at this line

Code:

Chain[8] Chip[1] TempTypeID=41 middle offset=37
Chain[8] Chip[1] local Temp=66
Chain[8] Chip[1] middle Temp=93
Special fix Chain[8] Chip[1] middle Temp = 81
Done read temp on Chain[8]
do read temp on Chain[10]
Chain[10] Chip[1] TempTypeID=41 middle offset=33
Chain[10] Chip[1] local Temp=67
Chain[10] Chip[1] middle Temp=80
Special fix Chain[10] Chip[1] middle Temp = 82
Done read temp on Chain[10]

It looks like it reach the high temp protection that is why your miners hashrate is down or stop you must add more cooling devices in your room or you can try to change the fan speed to maximum speed.
You can follow the guide here https://bitcointalk.org/index.php?topic=2690140.0 but first do a reset it to factory default here's the guide https://enforum.bitmain.com/bbs/topics/3957

Let me know if it's still persist.

While increasing fan speed would be helpful, I don't think adding cooling devices is necessarily good advice. Rather than trying to cool the room down, try to exhaust the heat outside the room, so that you are removing heat as opposed to cooling it.