Code OS-144: System error %x, %x at %x
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical System error %x, %x at %x 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: An unknown register dump occurred. Remedy: Contact your local FANUC representative and provide the following information for further investigation. o Record the entire error message(s) that occurred including any program running at the time of the system error. o Retrieve the following files from the File Menu: md:histe.ls md:histr.ls md:hists.ls md:histp.ls md:conslog.ls md:errall.ls o In addition for a system V5.22 or greater, do a diagnostic backup from the file menu to send to your local FANUC representative.
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 OS-144 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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