BITMAIN AntMiner S21 Pro - Page 16

S21 Pro User Guide
13
F1:1
Fan1 is not
detected or its
speed is low
Check if the fan1 connection is normal, replace
the power supply, or replace the fan
F2:1
Fan2 is not
detected or its
speed is low
Check if the fan2 connection is normal, replace
the power supply, or replace the fan
F4:1
Fan3 is not
detected or its
speed is low
Check if the fan3 connection is normal, replace
the power supply, or replace the fan
F8:1
Fan4 is not
detected or its
speed is low
Check if the fan4 connection is normal, replace
the power supply, or replace the fan
J:8
The number of
hashboards is
less than the
design
Check if the hashboard connection is normal,
or replace the hashboard
P:1
High
temperature
protection
Check if the environment temperature is
normal, or check if the gel on the hashboard is
effective
P:2
Low
temperature
protection
Check if the environment temperature is
normal
J1:4
Chain1
EEPROM data
error
Redo the factory test for chain1
J2:4
Chain2
EEPROM data
error
Redo the factory test for chain2
J4:4
Chain3
EEPROM data
error
Redo the factory test for chain3