Code PALL-133: Could not clear file
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Could not clear file 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: If the unitload is being used in production it cannot be cleared. If a unitload was loaded into memory at Controlled start, it can only be cleared at Controlled start. Remedy: 1. Wait until production is aborted and clear the unitload. 2. If the unitload was loaded at Controlled start, you will have to go to controlled start to clear it. At a Controlled start, press MENUS, select Clear UnitLd. 3. You will only be able to clear unitloads that were loaded at Controlled start from the Controlled start menu.
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 PALL-133 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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