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Antminer Error Code Complete Guide

Antminer Error Code Complete Guide

Created 2026/05/19　 Updated 2026/05/20

Antminer has a built-in self-diagnostic system. When hardware or software anomalies are detected, error codes are displayed via kernel logs. Correctly identifying these codes is critical for quickly restoring the hash rate. This document is based on Bitmain's official documentation and actual repair experience, providing a complete list of all defined Antminer error codes.

Antminer error code V1

1. Average Total Hash Rate Anomaly

Error Code

Cause

Suggestions

R:1

The average total hash rate is too low

1. Upgrade firmware to the latest version
2. Replace the power supply
3. Return to the factory for repair

2. Hashboard Is Broken or has a low hash rate

Error Code

Cause

Suggestions

R1:1

Chain1 hashboard damaged or hash rate too low

1. Check Chain1 connection
2. Upgrade firmware
3. Replace hashboard
4. Return to the factory for repair

R2:1

Chain2 hashboard damaged or hash rate too low

Same as above

R4:1

Chain3 hashboard damaged or hash rate too low

Same as above

R8:1

Chain4 hashboard damaged or hash rate too low

Same as above

3. ASIC Chip Damage

Error Code

Cause

Suggestions

J1:1

Chain1 has damaged ASIC chip

1. Upgrade firmware

2. Replace the power supply
3. Return to the factory for repair

J2:1

Chain2 has damaged ASIC chip

Same as above

J4:1

Chain3 has damaged ASIC chip

Same as above

J8:1

Chain4 has damaged ASIC chip

Same as above

4. PIC Control Chip Error

Error Code

Cause

Suggestions

J1:5

Chain1 PIC chip anomaly

1. Check Chain1 connection
2. Upgrade firmware to the latest version
3. Replace hashboard
4. Return to the factory for repair

J2:5

Chain2 PIC chip anomaly

1. Check Chain2 connection
2. Upgrade firmware to the latest version
3. Replace hashboard
4. Return to the factory for repair

J4:5

Chain3 PIC chip anomaly

1. Check Chain3 connection
2. Upgrade firmware to the latest version
3. Replace hashboard
4. Return to the factory for repair

J8:5

Chain4 PIC chip anomaly

1. Check Chain4 connection
2. Upgrade firmware to the latest version
3. Replace hashboard
4. Return to the factory for repair

5. ASIC Chip Count Anomaly (Fewer Than Designed)

Error Code

Cause

Suggestions

J1:2

Chain1 detected fewer chips than designed

1. Check Chain1 connection
2. Upgrade firmware to latest version
3. Replace hashboard
4. Return to factory for repair

J2:2

Chain2 insufficient chip count

1. Check Chain2 connection
2. Upgrade firmware to latest version
3. Replace hashboard
4. Return to factory for repair

J4:2

Chain3 insufficient chip count

1. Check Chain3 connection
2. Upgrade firmware to latest version
3. Replace hashboard
4. Return to factory for repair

J8:2

Chain4 insufficient chip count

1. Check Chain4 connection
2. Upgrade firmware to latest version
3. Replace hashboard
4. Return to factory for repair

Bitmain miner error code J1

6. Voltage or Frequency Out of Limits

Error Code

Cause

Suggestions

L1:1

Chain1 voltage or frequency out of limits

1. Upgrade firmware to the latest version
2. Return to the factory for repair

L2:1

Chain2 voltage or frequency out of limits

Same as above

L4:1

Chain3 voltage or frequency out of limits

Same as above

L8:1

Chain4 voltage or frequency out of limits

Same as above

7. Voltage or Frequency Mismatch

Error Code

Cause

Suggestions

L1:2

Chain1 voltage or frequency mismatch

1. Upgrade firmware to the latest version

2. Return to the factory for repair

L2:2

Chain2 voltage or frequency out of limits

Same as above

L4:2

Chain3 voltage or frequency out of limits

Same as above

L8:2

Chain4 voltage or frequency out of limits

Same as above

8. Cooling Fan Not Detected or Low Speed

Error Code

Cause

Suggestions

F1:1

Fan1 not detected or low speed

1. Check Fan1 connection

2. Replace the power supply
3. Replace the fan

F2:1

Fan2 not detected or low speed

1. Check Fan2 connection

2. Replace the power supply
3. Replace the fan

F4:1

Fan3 not detected or low speed

1. Check Fan3 connection

2. Replace the power supply
3. Replace the fan

F8:1

Fan4 not detected or low speed

1. Check Fan4 connection

2. Replace the power supply
3. Replace the fan

9. EEPROM File Error

Error Code

Cause

Recommendations

J1:4

Chain1 EEPROM file error

1. Re-run the factory test for Chain1

J2:4

Chain2 EEPROM file error

1. Re-run the factory test for Chain2

J4:4

Chain3 EEPROM file error

1. Re-run the factory test for Chain3

J8:4

Chain4 EEPROM file error

1. Re-run the factory test for Chain4

Antminer J2 series error codes

10. Other Error Codes

Error Code

Cause

Recommendations

N:1

Average hash rate far exceeds sales hash rate

1. Upgrade firmware to the latest version

N:2

Frequency reduced too much

1. Upgrade firmware to the latest version

V:1

Power supply initialization error or wrong output voltage

1. Check power supply output lines

2. Update firmware to the latest version
3. Replace the power supply
4. Return to the factory for repair

V:2

Power supply uncalibrated

1. Update firmware to the latest version

2. Replace the power supply
3. Return to the factory for repair

F:1

Fan error

1. Check fan connection
2. Replace the power supply
3. Replace the fan

J:8

Fewer hashboards than designed

1. Check the hash board connections
2. Replace hashboard

P:1

High temperature protection

1. Check if the ambient temperature is normal
2. Check if the thermal gel on the hash board is effective

P:2

Low temperature protection

1. Check if ambient temperature is normal

J:6

Temperature sensor failure

1. Check the hash board connection

2. Update firmware to the latest version
3. Replace hashboard
4. Return to the factory for repair

M:1

Memory allocation error

1. Update firmware to the latest version

2. Replace the control board
3. Return to the factory for repair

L:2

Mix level not found

1. Upgrade firmware to the latest version
2. Return to the factory for repair

N:4

Network connection lost

1. Check network connection

Antminer kernel logs show F series error codes

Correctly interpreting Antminer error codes is a key skill for efficient mining farm operation. Miners are advised to regularly back up logs and use this guide to quickly locate faulty chains, reducing downtime. For miners who repeatedly show the same code, arrange timely repair or replacement to avoid affecting the machine's overall lifespan.

Zeus Mining has compiled and shared a series of in-depth troubleshooting articles on Antminer hashboard repair and launched online training video courses covering advanced topics such as ASIC chip-level repair, PIC reflashing, and voltage fault troubleshooting.

👉 Visit Zeus Mining's official channels for more repair resources and technical tutorials.

Disclaimer: This document is based on publicly available information and is for reference only. Always follow equipment safety regulations during actual repairs. Non-professionals should not disassemble the control board or power supply.

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