BITMAIN AntMiner S21 Pro - Page 15

S21 Pro User Guide
12
R8:1
Chain4 is
broken or has
low hashrate
Check if chain4 connection is normal, update
the firmware to the latest version, replace the
hashboard, or return to factory for repair
J1:1
Chain1 has bad
ASIC
Update the firmware to the latest version,
replace the power supply, or return to factory
for repair
J2:1
Chain2 has bad
ASIC
Update the firmware to the latest version,
replace the power supply, or return to factory
for repair
J4:1
Chain3 has bad
ASIC
Update the firmware to the latest version,
replace the power supply, or return to factory
for repair
J8:1
Chain4 has bad
ASIC
Update the firmware to the latest version,
replace the power supply, or return to factory
for repair
N:1
Average total
hashrate
exceeds the
sale hashrate
too much
Update the firmware to the latest version
N:2
Frequency is
reduced too
much
Update the firmware to the latest version
V:1
Power
initialization
error or power
output voltage
error
Check power output wiring, update the
firmware to the latest version, replace the
power supply, or return to factory for repair
V:2
Power supply
is not
calibrated
Update the firmware to the latest version,
replace the power supply, or return to factory
for repair
F:1
Fan error
Check if the fan connection is normal, replace
the power supply, or replace the fan