BITMAIN AntMiner S21 Pro - Restoring Initial Settings; Error Code

S21 Pro User Guide
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3.4 Restoring Initial Settings
To restore your initial settings
1. Turn on the server and let it run for 5 minutes.
2. On the controller front panel, press and hold the Reset button for 10 seconds.
Caution: Resetting your server will reboot it and restore its default settings. The red
LED will automatically flash once every 15 seconds if the reset is operated successfully.
3.5 Error Code
Here is the server error code and the corresponding reasons and suggestions:
Error Code
Reason
Suggestion
R:1
Average total
hashrate is low
Update the firmware to the latest version,
replace the power supply, or return to factory
for repair
R1:1
Chain1 is
broken or has
low hashrate
Check if chain1 connection is normal, update
the firmware to the latest version, replace the
hashboard, or return to factory for repair
R2:1
Chain2 is
broken or has
low hashrate
Check if chain2 connection is normal, update
the firmware to the latest version, replace the
hashboard, or return to factory for repair
R4:1
Chain3 is
broken or has
low hashrate
Check if chain3 connection is normal, update
the firmware to the latest version, replace the
hashboard, or return to factory for repair