Canaan Troubleshooting Guide
99 error codes and fixes for Canaan ASIC miners.
Avalon – Firmware Flash via AUC
All Avalon controllers that push MM firmware over the AUC3 USB-to-IIC bus:...
Avalon – AUC Controller Network Loss
Avalon 721, 741, 821, 841, 851, 921, 1026, 1047, 1066, 1146, 1166,...
Avalon 1246 – PSU Not Detected
Avalon 1246 (83T/85T/87T/90T/93T/96T); same signature observed on Avalon 1166/1166 Pro with matching...
Avalon 1246 – Low Hashrate
Avalon A1246 (all production batches, A3206 silicon; cross-applicable to A1246I)
Avalon 1166 – Hashboard Not Detected
Avalon 1166 (A3206 chip) | Avalon 1166 Pro | 1166 MaxSpeed variants
Avalon 1246 – Hashboard Not Detected
Avalon 1246 (A3206M chip) | Avalon 1246 Pro | 1246 MaxSpeed bins
Avalon 1166 – Fan Speed Error
Avalon 1166, Avalon 1166 Pro (cross-applicable diagnostic logic to A1066 and A1266;...
Avalon 1246 – Fan Speed Error
Avalon 1246 (all sub-revisions: 1246-83T, 1246-87T, 1246-90T)
Avalon 1246 – Temperature Too High
Avalon 1246 (all sub-SKUs - 81T, 83T, 85T, 87T, 90T), Avalon 1166,...
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Last reviewed May 25, 2026.