Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 211. (Read 528055 times)

You are correct about the fan rarely coming on [IF AT ALL] when the 850 is pulling only 400 of it's available 850 watts.  My Corsair AX860's are the same way.  During the winter [When the ambient is very low] the fans on my AX860's would hardly ever come on.

However, what is odd with his is the bit about the controller that was taken off of a working S7 would not work on the one he initially had problems with.  THEN, when he moved the controller back to the original S7 it was taken from, he began to have the same issues with that S7.  The entire episode sounds very unusual for sure.

EDIT:  Unless he is using the same PSU on the same S7's and has not gone back to the original PSU the S7's that were working fine with before swapping controllers.
[/quote]

----------------------------

Two entirely different systems; one bad S7 not hashing with a APW3-12-1600-B2 from Bitmain and one good S7 using its own APW3-12-1600-B2.

I run all of mine with three rm1000 for two s7.
You probably have the 850 on one hash board and the 1000 on the other two.
The 850 will only be pulling 400watts so the fan won't spin.
The 1000 fan will spin because it is pulling 800 watts.
For me all three rm1000 fans spin because they are all pulling 800 watts.
I did have a problem where one of the rm1000 did not switch on even with the jumper.
Caused the miner to think that two blades were partially on but only hashed at 1.5th.
Sometimes the controller lies. I would think that with no power to two boards that only one set of chips would show up. Not the case. I put a spare rm1000 in place of it and it worked fine after that.
I had to rma the rm1000. They sent me a brand new one. They have 5 year warranty. Ax860 ax series has a seven year warranty.
I did get four bitmain 1600 watt psu's so they would fit in a smaller rack.
They have been running fine since I got them.

[/quote]

You are correct about the fan rarely coming on [IF AT ALL] when the 850 is pulling only 400 of it's available 850 watts.  My Corsair AX860's are the same way.  During the winter [When the ambient is very low] the fans on my AX860's would hardly ever come on.

However, what is odd with his is the bit about the controller that was taken off of a working S7 would not work on the one he initially had problems with.  THEN, when he moved the controller back to the original S7 it was taken from, he began to have the same issues with that S7.  The entire episode sounds very unusual for sure.  I'm kind of leaning towards a defective PSU myself.

EDIT:  Unless he is using the same PSU on the same S7's and has not gone back to the original PSU the S7's that were working fine with before swapping controllers.

I run all of mine with three rm1000 for two s7.
You probably have the 850 on one hash board and the 1000 on the other two.
The 850 will only be pulling 400watts so the fan won't spin.
The 1000 fan will spin because it is pulling 800 watts.
For me all three rm1000 fans spin because they are all pulling 800 watts.
I did have a problem where one of the rm1000 did not switch on even with the jumper.
Caused the miner to think that two blades were partially on but only hashed at 1.5th.
Sometimes the controller lies. I would think that with no power to two boards that only one set of chips would show up. Not the case. I put a spare rm1000 in place of it and it worked fine after that.
I had to rma the rm1000. They sent me a brand new one. They have 5 year warranty. Ax860 ax series has a seven year warranty.
I did get four bitmain 1600 watt psu's so they would fit in a smaller rack.
They have been running fine since I got them.

I always run static. I have too many other devices that are running dynamic.
This way if you take a power hit it will stay on the same ip.

I am running my S7 with the RM 1000 and RM 850. The only problem I have is I notice the 850 felt warm and did not see the fan running as both fans only turn on when needed so they are hard to know if the fans are working or not. I went ahead and placed a fan to blow air thru it and it's much cooler now. But they have been running the miner fine for going on a couple weeks+ now.

You could also try getting in contact with their US distributor.  I had good luck with that.  They'd probably charge you for the repair, but you'd have it much faster if your goal is a quick return.

It is not so long. I sent my S7 blades  back on Monday with UPS and today I received a tracking number.

1x S7 = 0.037 BTC per day  (PPS and Antpool)
Apparently pays shipping more , If your mining loss.

Yes, Thanks for the information.  I am prepared to pay for shipping back to Bitmain; although, the time to get to Bitmain, inspected, repaired, and returned to me is the killer.  I can remain hopeful though!!!

Haha, as you guys speak (write) I am trying it!!!   I am willing to get these running right now!  I have reflashed (resetting with paperclip until it beeps).

Read the warranty policy.

https://www.bitmaintech.com/productDetail.htm?pid=00020150827084021471OHYdwd9D06A0

4. Customer must return the defective parts at own expense after opening a support ticket and troubleshooting with Bitmain's instructions.

I has a simular problem with a S5, it to wasn;t hashing at all, i reflashed it, and it came back to life..

It only seems to you.

3 broken blades from 99 is not to much.

This situation arose for me from one PSU and two times.

I have using this setup.
1 x Corsair RM 850 with controller and 1 board
Corsair RM1000 with another 2 boards.

Corsair RM850 turned itself out and another 2 boards are  powered for some hours.

If I restarted miner from PSU switches, came from miner hot air and the smell of burnt.

I put in there the other miner, with the same PSU-s, and after day was the same with 1 board with another miner.

Always the blade(s), which was powered with RM1000 and after that, when RM850 Switch off for some mysterious reason.


This RM850 works for me today with 3x Antminer S5 blades water cooled , so
perhaps it is not the fault of the PSU He bears the load about 850-885 W

However, the conclusion is, use only 1 PSU per miner.

bummer...maybe try to reflash the operating system image again, don't remember if you did this already or not. sometimes I also just touch/push on connectors, but it might be futile...i was probably just lucky that it came back from a similar situation (a random event).
EDIT: bad miner messed up formely good controller? Wow. You are not wearing a sweater by any chance (ESD?)

Yes still showing 48 ASICS on each one of the bad miners. 

----VERY IMPORTANT INFORMATION----

I was told my Bitmain to troubleshoot the issue on my 2 bad miners not hashing.  I tried changing fan settings and putting new fans on with no change.  One step was to take a good controller card from another miner and put it onto the bad miner to see if it is the controller card that is bad.  It showed the same results on the bad miner as the old controller did.   BUT when I returned the good controller, it too was now showing 48 ASICS and is now not hashing.  I now have 3 bad miners.  I have sent pics and all of this information back to Bitmain.  I have asked to have 3 new machines sent to me.  I am wondering what they will determine.

I just reset my modem and router, unplugged all of my devices and restarted with no change.

Is it just me, or does it seems like the S7's are one of the most problematic Bitmain products ever ?

I did notice that the control shows 48 ASICS too.  It shows the most recent Oct firmware in the control panel.

I had a single "o" disappear one time from image and count #, and was down on hashrate.  Soft reboot and it was back to normal.

sorry, did not count chips, but vaguely remember that rows of "o" were uneven vs usual, but could be wrong about it.
not sure if i looked at temp..

This is S7 software but with broken boards and  temp 0 yssue He sees only  48 chips


You have a broken miner.

You need to contact with [email protected]

I had three blades with the same issue  from 2 different miners, which showed only 48 chips and temp 0 and they are now back in China.


identical situation - only 48 chip ant temp 0 ?