Antminer S5 loses connection - Burns itself to death

[Pt0x]

In the meantime

[dimke_yu]

Great job! You should write what you did for everyone that want to resolve issue with self burning devices. You unpluged PWM from 4 pin fan connector?

[opentoe]

It shouldn't heat up if it looses internet connection, it makes no sense. I guess that unit goes into some kind of loop... But why besides that it didn't shut down >80c is beyond me...

Review the S5 thread. Sorry to hear this happened and lucky a fire didn't start or burn your place down. I reported this last March in the S5 thread. Bitmain has given me a "new" firmware but since I have all my fans directly connected now and the smits firmware is working good I'm just going to keep them the way they are. Especially in this NJ heat. Anything related to this bug should be looked at by Bitmain very closely. You should not have to re-arrange your fan configuration from stock if everything was working correct.y

[opentoe]

I'll cut the blue wire on my S5s fan first thing tomorrow morning...

It's a little annoying if I have to sell them in the future, but I prefer that than the risk of frying them! I'll make an adapter for my next S5s (Material's coming in 3 weeks... !)

Don't cut! Be easier to buy a little tool to get the pins out, so you can put them back in if you want to re-sell.

Something like this.

http://www.amazon.com/mod-smart-Full-Removal-Tool/dp/B001KQDS6G

[opentoe]

So the issue is that when they lose their internet connection (ie, switch or dns fails or it runs out of backup pools) the chips stay on for some reason?  Eventually burning up the hardware?

Are there other symptoms?  Like, the unit is on and not responsive to pings or the WebUI is not accessible? 

If so, this is troubling because we host a large number of S5s that are super finicky, they randomly just stop working even with stable networking and power and require a hard reset and costs me a lot of man hours resetting these things.  Also, this behavior does not seem to be heat related.

Lets start a list of firmware versions that this is happening with.

https://bitcointalk.org/index.php?topic=902305.msg10833820#msg10833820

[Pt0x]

Great job! You should write what you did for everyone that want to resolve issue with self burning devices. You unpluged PWM from 4 pin fan connector?

Just like opentoe said:

Don't cut! Be easier to buy a little tool to get the pins out, so you can put them back in if you want to re-sell.

But I used the sharp tool in the picture to push the pin out of the connector. It took me seconds to safely get it out without cutting the wire. Then I used black adhesive tape to isolate the pin.

[yxt]

Update:
1.User defined fan speed;
2. Interval of detection time for high temperature protection is 2S after the first alarm;
3. Process optimized of miner's status;
MD5: 1579E8B4035FC1FD85A1B2F6B5A8EFB4

https://www.bitmaintech.com/files/download/SD-S5-20150715-fan_ctrl.tar.gz

[tutorialevideo]

Update:
1.User defined fan speed;
2. Interval of detection time for high temperature protection is 2S after the first alarm;
3. Process optimized of miner's status;
MD5: 1579E8B4035FC1FD85A1B2F6B5A8EFB4

https://www.bitmaintech.com/files/download/SD-S5-20150715-fan_ctrl.tar.gz

anyoane tested the shit?

[VirosaGITS]

Update:
1.User defined fan speed;
2. Interval of detection time for high temperature protection is 2S after the first alarm;
3. Process optimized of miner's status;
MD5: 1579E8B4035FC1FD85A1B2F6B5A8EFB4

https://www.bitmaintech.com/files/download/SD-S5-20150715-fan_ctrl.tar.gz

anyoane tested the shit?

I'm getting my hand on an Antminer S5 and i would very much like to know if there was a firmware solution or if that fan control properly operate when there is a lost of internet connection. Full fan control also sound great to wind down the fan a bit? No need for 4k rpm if the unit is in mid 50s C imo.

[Prelude]

Just tested the new firmware on an S4+, fan control works.

[QuintLeo]

In the meantime

 Not quite identical to how I did mine, but close enough folks might mistake our miners for being modded by the same person.

 8-)


 I usually use a small jeweler's screwdriver 'cause I have it around, but have used an XActo in the past to remove pins from connectors for other reasons in the past. Just needs to have a point or a very short narrow blade to be able to press down on the retainer tab while pulling the pin out.


 I DO recommend using actual electrical tape for isolation of the pulled-out pin - some 'adhesive' tape types have very little insulation value.



 I've not been impressed with smits firmware - have it on one of my S5s, and that machine hashes a good 5% slower than ANY of my others at the same clock. I don't think the cgminer 4.9.0 is optimised right for the S5, as that's the only difference I can find that would account for the difference in hashrate.

[opentoe]

In the meantime

 Not quite identical to how I did mine, but close enough folks might mistake our miners for being modded by the same person.

 8-)


 I usually use a small jeweler's screwdriver 'cause I have it around, but have used an XActo in the past to remove pins from connectors for other reasons in the past. Just needs to have a point or a very short narrow blade to be able to press down on the retainer tab while pulling the pin out.


 I DO recommend using actual electrical tape for isolation of the pulled-out pin - some 'adhesive' tape types have very little insulation value.



 I've not been impressed with smits firmware - have it on one of my S5s, and that machine hashes a good 5% slower than ANY of my others at the same clock. I don't think the cgminer 4.9.0 is optimised right for the S5, as that's the only difference I can find that would account for the difference in hashrate.

I have SMITS firmware on over 14 S5's and always has worked great. cgminer 490 freq control version.

[QuintLeo]

I wasn't aware there is more than one version of the smits firmware. How can you tell which you have?

 Not saying it's not working - just that it mines SLOWER than the Bitmain firmware on my other units that have cgminer 4.8.0 instead of the 4.9.0 on the smits unit

[professor21]

it might be better not to flash firmware and risk miner destruction.  if you do flash firmware wait at least 1 hour for each flash and make sure you hear a series of beeps

[Darthswan]

Well mine just burned up today.  Had issues with att uverse.  Really pissed.  I'm outside of my warranty.  Any suggestions.