Recently, many customers reported small issues with their machines. This is a concise troubleshooting summary to help you quickly identify and fix common Antminer errors.
1. Hardware Errors
ERROR_FAN_LOST — Fan Lost
Symptoms: Abnormal fan RPM or fan stopped; log shows fan lost error.
Causes: Loose fan connector, broken cable, fan motor failure, or control board fault.
Troubleshooting:
- Check that the fan connector is firmly seated and the cable is intact.
- Swap in a known-good fan to test. If still failing, replace the control board.
- If multiple fans report errors, try restoring factory defaults.
ERROR_POWER_LOST — Power Lost
Symptoms: Miner fails to start or suddenly powers off; logs show power lost.
Causes: Loose power-control cable, faulty PSU, or loose busbar screws.
Troubleshooting:
- Reseat power-control cables and check busbar screws are tightened.
- Update firmware or test with another PSU.
ERROR_ASIC_LOSS — ASIC/Chip Loss
Symptoms: Hash board detects missing chips; logs report ASIC loss.
Causes: Unstable power, poor grounding, or physical chip damage.
Troubleshooting:
- Try a different power supply and verify proper grounding.
- If the issue persists, return the unit for factory repair.
ERROR_EEPROM_INFO — EEPROM Error
Symptoms: Miner fails to boot; logs show EEPROM exception.
Causes: Corrupted board firmware or hardware fault on the hash board.
Troubleshooting:
- Attempt a firmware upgrade or card-flash recovery.
- If unsuccessful, send the hash board to factory service.
2. Network Errors
WARN_NET_LOST / NET Err — Network Lost
Symptoms: Miner cannot connect to the pool; logs show network errors.
Causes: Loose cable, switch failure, incorrect network config, or LAN restrictions.
Troubleshooting:
- Ensure the Ethernet cable is firmly connected; try another cable or switch port.
- Check network settings (IP, DNS) and local LAN port rules.
- Try another pool or contact your network administrator.
IP Conflict or Network Configuration Error
Symptoms: Miner cannot obtain IP or disconnects frequently.
Causes: IP conflicts, incorrect pool info, or ISP/port restrictions.
Troubleshooting:
- Change the miner’s IP to avoid conflicts.
- Verify pool URL, port, and worker name are correct.
- Contact ISP to confirm whether required ports are blocked.
3. Temperature & Cooling Errors
High-Temperature Protection Triggered
Symptoms: Miner auto-shuts down; logs show overheating.
Causes: Dust-clogged heatsinks, intake air temperature too high, or blocked exhaust.
Troubleshooting:
- Clean heatsinks and fans; ensure intake air is within 5–35°C.
- Make sure exhaust is unobstructed; add extra cooling if necessary.
read temp sensor failed — Temperature Sensor Read Failed
Symptoms: Miner cannot read temperature data; logs show sensor error.
Causes: Faulty temperature sensor or overheating chip.
Troubleshooting:
- Check for high-temperature operation; attempt card-flash recovery.
- If the problem persists, try replacing the PSU or send for factory repair.
4. Firmware / Configuration Errors
ERROR_SOC_INIT — Initialization Failed
Symptoms: Miner fails to boot; logs show init error.
Causes: Loose ribbon cable, firmware corruption, or incorrect multi-board (daisy-chain) connection.
Troubleshooting:
- Reseat ribbon cables and try card-flash recovery.
- Check whether multiple hash boards are correctly connected.
Configuration Errors Preventing Mining
Symptoms: Miner connects to pool but reports zero hashrate; no earnings despite no obvious log errors.
Causes: Incorrect worker name, wrong pool settings, or factory-reset without reconfiguration.
Troubleshooting:
- Verify the worker name format (no spaces, correct punctuation and character type).
- Restore factory settings and re-enter pool details carefully.
5. General Troubleshooting Workflow (Recommended)
- Check logs first: Login to the miner backend (via IP) and review the Kernel Log to locate the first error.
- Stepwise elimination: Tackle problems in order — Hardware (fan, PSU, chips) → Network (cables, settings, pool) → Temperature/Cooling.
- Firmware and card flashing: Try firmware upgrade or card-flash recovery, following proper procedures (avoid bending boards).
- Factory repair: If physical damage is suspected (chip short, control board fault), contact a professional for RMA/repair.
Quick Checklist
- Are all connectors and screws tight (fans, power, busbar)?
- Is the network cable and pool configuration correct?
- Is the ambient temperature within recommended range (5–35°C)?
- Have you checked Kernel Log for the first error occurrence?
- Have you tried a firmware update or card-flash recovery?
Support & Repair
If hardware damage is confirmed, please contact our team or Bitmain support. For step-by-step remote assistance, provide the miner model, serial number, Kernel Log output, and the exact error code.
