Code ARC-090: Weld disable by reason[%d]
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Weld disable by reason[%d] alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Cause: In this situation, the welding is disabled by the following reason 1: In Single step mode 2: In Machine lock mode 3: In Dry run mode 4: No I/O board exist 5: No I/O assignment for welding 6: In Flush AMR status 7: In Application disabled mode 8: In Arc disabled status 9: In Skip welding status 10: In disable status mode by AWDBG Remedy: Please remove the specified reason to perform the welding.
Source: FANUC Robot R-30iA Alarm Code List Operator's Manual
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Fanuc R-30i Series Robot Controller Alarms
Fanuc controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code ARC-090 on the R-30i Series Robot Controller identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Fanuc's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 6553 Fanuc R-30i Series Robot Controller codes.
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