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Biodom (OP)
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October 23, 2017, 01:12:26 AM
 #1
Had anyone had a situation where one fan shows 30600 rpm?
I have one S9 that does it, consequently second fan under-spins at 2280 rpm; PCBs are a bit hot and miner periodically loses a board (randomly).
The board comes back upon soft or hard restart, but fan speed keeps at 30600.

Q:
1. did it happen to you?
2. if it did, can anything help the situation?

I am reluctant to sent this S9 for repair because apart from showing high fan speed, miner works OK, until it drops a board, that is.
However, since restart brings it back, it is not that big of a deal.
please, let me know.
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VRobb
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October 23, 2017, 02:36:48 AM
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It's a known bug. Not sure what can done about it unless you aren't running the latest firmware, but updating firmware is its own thing... Roll Eyes
I don't believe in superstition because it's bad luck: 13thF1oor6CAwyzyxXPNnRvu3nhhYeqZdc
These aren't the Droids you're looking for: S5 & S7 (Sold), R4B2, R4B4 (RIP), 2x S9 obsolete, 2xS15-28, S17-56, S17-70
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October 23, 2017, 01:21:58 PM
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Quote from: VRobb on October 23, 2017, 02:36:48 AM
It's a known bug. Not sure what can done about it unless you aren't running the latest firmware, but updating firmware is its own thing... Roll Eyes

Thanks.

I did not update the software because it is such a nuisance. So far it never helped with anything.
Right now this S9 (early autotuning batch) restarts in just 5-6 min.
If this is the only thing that helps, I might do it, reluctantly.
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October 24, 2017, 06:23:45 PM
 #4
Just to give you an idea of how common that bug is here is a screenshot of 30 miners with 8 of them showing the bug.
Stop buying industrial miners, running them at home, and then complaining about the noise.
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October 25, 2017, 04:17:20 AM
 #5
@fanatic26: wow, high % as 8/30=~27%.

So, it is un-fixable?

Even soft update does not help or you did not bother?
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October 25, 2017, 05:53:00 PM
 #6
No firmware changes have ever fixed this. It is something I have dealt with on these s9s since the beginning. As it doesnt affect mining in any way that I have ever noticed I just chalked it up to bitmains laziness in that they dont care to patch it.
Stop buying industrial miners, running them at home, and then complaining about the noise.
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October 27, 2017, 01:54:15 AM
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Quote from: fanatic26 on October 25, 2017, 05:53:00 PM
No firmware changes have ever fixed this. It is something I have dealt with on these s9s since the beginning. As it doesnt affect mining in any way that I have ever noticed I just chalked it up to bitmains laziness in that they dont care to patch it.

Thanks, it means that I should not bother upgrading the system.
You are probably located in a colder climate because in my case (higher ambient), PCB temp goes to 79-80C and one board drops from time to time.
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