S9K fan lost

Hi all Miners,

I experienced a few miners S9K starting loosing its fan. FAN 1 to be exact.
Anyone of u have the same experienced? Is only 7 months old.

MM

Yeah 7 months to 2 years they all go.

pick up a replacement on ebay or amazon

https://www.ebay.com/itm/6500RPM-Cooling-Fan-Replacement-4-pin-Connector-For-Antminer-Bitmain-S7-S9-Black/112634675926?

https://www.ebay.com/itm/7500RPM-Cooling-Fan-Replacement-4-pin-Connector-For-Antminer-Bitmain-S7-S9-Black/123531120730?

I went to ebay and picked first two in the search

you want 6000 rpm to 7500 rpm 4 pin pwm

If you get lucky maybe 8 bucks a fan I don't want to really search it out tonight. You can do it .

I do not know those fan sellers
If you look harder you could save a few bucks.

It's a well-known issue on S9k but if it still spinning physically you can try this below

It's worth to try to fix it by:

- Remove the fan and then put or attach it back then test.
- Cleaning the fan terminals use Laquer flo thinner to clean them then test it again.
- Resolder terminals are also worth trying.

If these three methods don't work well replacement is the final solution as suggested above.

Quote from: BitMaxz on March 20, 2020, 11:56:21 PM

It's a well-known issue on S9k but if it still spinning physically you can try this below...

How is that an S9k issue? this is more like every fan on planet earth's issue, running for months with probably little no cleaning is enough to toast any fan, it really has nothing to do with the S9k model itself, S9k is indeed the worst miner as far as the control board and hashboards are concerned, but it's a matter of luck when dealing with fans, I have some fans that spin for nearly two years at 90% without a problem, some die in a few months, you just got to blame your luck and move on, there isn't really any way around to fix those fans given their cheap prices.

OP, get yourself a new fan/s as Phill said, and I would advise you to actually get an extra one because pretty soon the other one might stop working too, a spare fan and a spare PSU are really important, this is why owning a single miner is probably a bad idea, because buying a spare fan, PSU and a control board for a single miner is not the best thing to do, but if you have a few of them and keeping a single piece of spare of everything makes a lot of sense.

On a side note, I am not sure if this just by chance, but I noticed that setting a fixed fan speed on those fans even at high RPMs of 90%, the fans tend to last longer than those set to auto-mode, maybe the continuous change of the motor speed kills it faster, or maybe that was just my luck.

running a fan at 70 or 75 or 80 or 85 or 90 percent static setting is far better then auto tuning a fan.

100% setting is stupid as it burns up and does not cool much better then 90%

auto tuning also kills them.

I try to set fans to 70 and track temps if needed bump to 75. and up to 90 if needed.

Antminer gear can sometimes use a lower fan even a 4000 rpm set to 90% may work depends on what miner you are using.

all s9's will run with a 4700 rpm model set to 85% static.

now it may be you set a really high freq and are burning up with that fan but the miner will try to run.

When it checks the fans for speed to determine you have working fans it looks for the fans to get up to 4000 rpm or higher at 100% .

this is a slower lower energy fan

https://www.ebay.com/itm/Delta-AFC1212DE-Brushless-DC-12V-Dell-D8794-120mm-case-fan/303520377433?

the gear will run on a low speed setting with this fan. I use it to make one and 2 board space heating s9's

do not get any fan weaker than this.

also have a good understanding OF WHAT YOU ARE DOING IF YOU GO THE LOWER WEAKER FAN ROUTE.

ie don't think an s9 will do 3 boards at 15th with these fans.

not sure how the speed running on S9 and T9+, but these old model miner fan seems running longer than S9K.

BTW, i just changed the fan. Thanks miners.

Quote from: MigaoMiner on March 24, 2020, 01:58:01 AM

not sure how the speed running on S9 and T9+, but these old model miner fan seems running longer than S9K.

I highly doubt the quality of the fans on the S9 and T9+ are any better than those on the S9k, the latter miner is indeed the worst of all, I have created a whole topic explaining why one shouldn't be purchasing Antminer S9k.

I wouldn't be surprised if the way the firmware handles the fans' speed makes them die sooner, I have not experienced that because I set static fan speed on all of them, took me a while to figure out how to do it, but not more than a few days which indeed not enough to toast them.

Meanwhile, I suggest you set a fixed fan RPMs just to be on the safe side, you can follow this guide and set the % you desire for the fans, I personally use 90% most of the time, but the % you chose is up to you, if you face any issues in doing so, ask in that thread and I will happy to assist you.

If he got a real delta ball bearing fan it is better.

also san ace denki ball bearing is very good.

some times I got delta’s on s9 miners.

i once got a case of san ace or sanyo fans they were really good.

but a lot of s9 gear has shit generic or counterfeit fans.

Quote from: philipma1957 on March 24, 2020, 04:36:20 AM

If he got a real delta ball bearing fan it is better.

also san ace denki ball bearing is very good.

some times I got delta’s on s9 miners.

Everything comes with a price, last I checked delta fans for S9 go for above $20, which is way too much IMO, I bought a bunch of cheap fans from a Chinese supplier I paid like 3$ each, and believe it or not they were pretty good, obviously nothing like those high-end fans you suggested, but the life-span of any given miner is way too short to be worth an expensive fan IMO.

The good part, however, is that most Antminer fans have almost the same size and specs, so if it happens that your S9 is no longer profitable you can use the fans on say T17 or S17.

i confirm, i have buy discount fan 6000trs for antminer (arround 6usd), and, is good product, run without any problem by arround 2 years now ...