Topic: Whatsminer M21S fault-- NEED HELP - page 2. (Read 491 times)

Well if you did all the basic things and it still doesn't work they sent you a defective unit or possibly the delivery guy didn't handle it with care during delivery.

Would you mind telling us what company you bought this unit?
If it is still under warranty then better send it back to where you bought this unit for replacement or repair warranty.

Yeah I have already tried that, thought the same. I’ve had them both disassembled when changing the washboards around. Everything is tight and plugged in properly. Also tried reinstalling the firmware maybe there was a glitch but still the same. Also tried bixbit firmware but that’s the exact same.

If my suggestion does not work would you mind to try to replug all fan cables and power supply since it just recently arrived there's a possibility that there may be a loose connection between the power supply and the controller or there might be a loose screw on copper row, 6 screws should be tightened and copper bar should be aligned properly to avoid some issues.

Check the manual beliw on how to dismantle this unit and replug the PSU.
- https://www.zeusbtc.com/manuals/user-manuals/WhatsMiner-M21S-Manual.pdf

Hi, thanks for your reply’s. There are no fault codes showing in the Whatsminer too, I’ve also tried 2 different pools but get the same result. I thought it was just tuning at first but I’ve had it running for 2 h+ and get the same result, just a constant loop I’ll get the logs off Whatsminer tool and post them. Running out of ideas tbh

The only error that I could see on the logs you provided is "Restart as hashrate error" and then "system power off".

I would like you to try to change the pool first into solo.ckpool.org and see if the miner won't restart.

If the issue persists do what Mikeywith suggested above to get the error codes or use the Whatsminer tool it should give you error codes if the unit is running abnormally.

You can download the tool from this link below then go to the tools tab.
- https://www.whatsminer.com/src/views/firmware-download.html

For error codes check this link below.

- https://www.zeusbtc.com/articles/asic-miner-troubleshooting/1688-how-to-deal-with-fault-codes-of-whatsminer-series

1- please use code tag to insert any sort of logs


2- what you posted shows nothing wrong, you need to export logs from Whatsminer tools, it has all the details needed to troubleshoot the miner.

Furthermore, at the button of the status page, any errors will be displayed you just get the error number and then google it to find out what it says.

And most importantly, some of them take up to 45 mins to tune, so give them at least an hour, if you reboot them mid way they will start over.

Hi im new to the mining community and ive recently bought 2 Whatsminer M21S's. They were both tested before being shipped (Well known company) but when ive set them up they run for 10-15 minutes then restart. Theyll do a cooldown after restarting before mining again and then do the exact same thing again. They both have the exact same fault, ive swapped control boards about along with hashboards and at one point i had it running for 25 minutes all going well but now theyre stuck in the same look again without me changing anything. ive tried rumerous different things but cant figure it out. Can anyone help?

This is the log at the point of restart
11-29 04:01:42.00 N cgminer[2604]: Slot2 test fifo, ok cores:  91.6%, fifo percent:  93.8%,  93.4%
11-29 04:01:42.00 N cgminer[2604]: Slot0 test fifo, ok cores:  88.5%, fifo percent:  90.5%,  90.3%
11-29 04:01:45.00 N cgminer[2604]: Slot0 Change freq 812->811M, 801M, board temp:  62.5, hottest:   0.0, vol: 368, ok cores:  98.6%, failed: 0
11-29 04:01:46.00 N cgminer[2604]: Slot2 Change freq 831->829M, 818M, board temp:  66.5, hottest:   0.0, vol: 368, ok cores:  98.5%, failed: 0
11-29 04:01:46.00 N cgminer[2604]: Slot0 test fifo, ok cores:  88.8%, fifo percent:  91.2%,  90.6%
11-29 04:01:47.00 N cgminer[2604]: Accepted 0105b2aa Diff 64.1K/35267 SM 1 (temp 62.5 69.0 66.5 fan 4320 3780)
11-29 04:01:47.00 N cgminer[2604]: Slot2 test fifo, ok cores:  92.3%, fifo percent:  93.5%,  94.1%
11-29 04:01:49.00 N cgminer[2604]: Slot0 Change freq 811->811M, 801M, board temp:  62.5, hottest:   0.0, vol: 368, ok cores:  98.6%, failed: 0
11-29 04:01:50.00 N cgminer[2604]: Slot0 test fifo, ok cores:  88.8%, fifo percent:  91.2%,  90.6%
11-29 04:01:51.00 N cgminer[2604]: Slot2 Change freq 829->828M, 820M, board temp:  66.5, hottest:   0.0, vol: 368, ok cores:  98.9%, failed: 0
11-29 04:01:52.00 N cgminer[2604]: Slot2 test fifo, ok cores:  91.8%, fifo percent:  92.9%,  93.7%
11-29 04:01:52.00 N cgminer[2604]: Accepted 0159b0bf Diff 48.5K/35267 SM 2 (temp 62.5 69.0 66.5 fan 4320 3780)
11-29 04:01:55.00 N cgminer[2604]: Slot2 Change freq 828->827M, 819M, board temp:  66.5, hottest:   0.0, vol: 368, ok cores:  98.9%, failed: 0
11-29 04:01:56.00 N cgminer[2604]: Slot2 test fifo, ok cores:  92.2%, fifo percent:  93.3%,  94.1%
11-29 04:01:56.00 N cgminer[2604]: Upfreq freq: 839.5/841, power: 3362/(3350~3500), boards: 3/3, vol: 1272/(1272~1370), expect: 51.74T,64.98/(0.0~0.0W)
11-29 04:01:56.00 N cgminer[2604]: bt1920_get_fifo_percent: Slot0, percent:  91.2%
11-29 04:01:56.00 N cgminer[2604]: bt1920_get_fifo_percent: Slot1, percent:  99.8%
11-29 04:01:56.00 N cgminer[2604]: bt1920_get_fifo_percent: Slot2, percent:  94.1%
11-29 04:01:56.00 N cgminer[2604]: Slot2: upfreq wait board stable 4
11-29 04:01:59.00 N cgminer[2604]: bt1920_get_fifo_percent: Slot0, percent:  91.2%
11-29 04:01:59.00 N cgminer[2604]: bt1920_get_fifo_percent: Slot1, percent:  99.8%
11-29 04:01:59.00 N cgminer[2604]: bt1920_get_fifo_percent: Slot2, percent:  94.1%
11-29 04:01:59.00 E cgminer[2604]: Restart as hashrate error, fifo_percent: 95.0%, cur vol:1272(expect vol:1282, add:2.5%)->final vol:1272->1282
11-29 04:01:59.00 E cgminer[2604]: Attempting to restart cgminer git-078e627
11-29 04:01:59.00 N cgminer[2604]: Set fan auto speed mode enabled
11-29 04:01:59.00 E cgminer[2604]: system_power_off
11-29 04:01:59.00 N cgminer[2604]: Slot0: set reset pin 99 to 0
11-29 04:01:59.00 N cgminer[2604]: Slot1: set reset pin 100 to 0
11-29 04:01:59.00 N cgminer[2604]: Slot2: set reset pin 101 to 0
11-29 04:01:59.00 N cgminer[2604]: Turn off power
11-29 04:01:59.00 W cgminer[2604]:
Summary of runtime statistics:
11-29 04:01:59.00 W cgminer[2604]: Started at [1970-01-01 08:00:45.182]
11-29 04:01:59.00 W cgminer[2604]: Pool: stratum+tcp://stratum.braiins.com:3333
11-29 04:01:59.00 W cgminer[2604]: Runtime: 0 hrs : 0 mins : 0 secs
11-29 04:01:59.00 W cgminer[2604]: Average hashrate: 35607090.0 Mhash/s