D-CENTRALBitcoin Mining Quick-Reference

ASIC Miner Error-Code Quick-Reference Card

The most-seen Antminer / WhatsMiner / Avalon / Goldshell fault codes — severity, DIY difficulty and CAD repair-cost band. Pulled live from the D-Central 650-code corpus.

CodeMeaningSeverityDIYRepair (CAD)
FW_ERRFirmware Downgrade IssuesWarningModerate$20–$380Open →
PSU_ERRPSU Overcurrent ProtectionCriticalModerate$20–$900Open →
ERR_TEMP_HIGHTemperature Too High (Temp1/Temp2 > 95°C)CriticalModerate$20–$900Open →
CB_ERRControl Board Not BootingCriticalAdvanced$20–$300Open →
ERR_NO_HASHBOARDHashboard Not Detected (0 ASIC)CriticalModerate$20–$900Open →
ERR_LOW_HASHRATELow Hashrate (Missing ASIC Chips)WarningModerate$20–$900Open →
NET_ERRNetwork Configuration ResetWarningEasy$0–$450Open →
CHAIN_FAILHashboard Not DetectedCriticalModerate$63–$500Open →
ERR_FAN_SPEEDFan Speed ErrorCriticalModerate$20–$375Open →
HASH_LOWLow HashrateWarningModerate$20–$700Open →
INNO_ERRHashboard Not DetectedCriticalAdvanced$45–$400Open →
ERR_CODEFan Speed ErrorWarningModerate$20–$480Open →
FAN_FAULTFan Speed ErrorCriticalModerate$20–$550Open →
TEMP_OVERTemperature Too HighCriticalModerate$20–$650Open →
FAN_ERRFan Speed ErrorCriticalEasy$20–$420Open →
HB_NOT_FOUNDHashboard Not DetectedCriticalModerate$63–$900Open →
HW_ERRHigh Hardware Error RateWarningModerate$0–$900Open →
ASICCRCASICCRC ErrorWarningModerate$63–$750Open →
BOOTBYReboot BOOTBY Code DiagnosisInfoModerate$63–$900Open →
LOW_HASHLow HashrateWarningModerate$63–$900Open →
PSU_FAILPower Supply FailureCriticalAdvanced$200–$500Open →
A1166_CHIP_FAILSingle Chip FailureWarningAdvanced$63–$620Open →
A1166_FW_FAILFirmware Upgrade FailureWarningModerate$20–$420Open →
A1166_REBOOTFrequent RebootWarningModerate$20–$480Open →
A1246_DH_HIGHHigh DH% Error RateWarningModerate$200–$920Open →
A1266_CTRL_NOBOOTController Board Not BootingCriticalAdvanced$63–$600Open →
A1266_PSU_FAILPSU Not DetectedCriticalModerate$200–$480Open →
A1266_TEMP_HIGHTemperature Too HighCriticalModerate$20–$875Open →
A1346_FW_CORRUPTControl Board Firmware CorruptionWarningModerate$20–$850Open →
A1346_PSU_SAGPSU Voltage Sag Under LoadWarningModerate$200–$620Open →
A1346_REJECTStratum Rejected SharesWarningModerate$0–$820Open →
A1346_SSH_FAILSSH Access UnreachableWarningModerate$0–$520Open →
A1366_AUC_OTAUC Controller OverheatingWarningModerate$20–$480Open →
A1366_AUTH_FAILPool Authentication FailedWarningEasy$0–$320Open →
A1366_CTRL_NOBOOTControl Board Not BootingCriticalAdvanced$20–$625Open →
A1366_DEAD_CHIPSDead Chip Count ExceededWarningAdvanced$63–$900Open →
A1366_FLASH_FAILFirmware Flash FailureWarningModerate$20–$480Open →
A1366_PSU_FAILPSU Not DetectedCriticalModerate$200–$480Open →
A1366_WATCHDOGBOOTBY Watchdog ResetWarningModerate$63–$950Open →
A1446_FW_FAILFirmware Upgrade FailureWarningModerate$20–$450Open →

The 40 most-documented codes from the live 650-code corpus, ranked by coverage. Click any code for the full troubleshooting page. The same code can apply to several models; the link goes to a representative page.

Source: D-Central ASIC Error-Code Corpus (650 codes), rendered live from the dc_error_code database. Severity and DIY difficulty are editorial classifications.

Back to the source: ASIC Error-Code Corpus (CSV/JSON, 650 codes) · related guide · all reference cards · Open Mining Data hub

© 2026 D-Central Technologies, Laval, Quebec · Free to share under CC BY 4.0 with attribution to D-Central. A reference, not a guarantee — verify against your specific hardware.