Code SRVO-208: Extended axis brake abnormal
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Extended axis brake abnormal 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: The FET current for the brake of an extended axis (brake number 2 or greater) exceeded the specification. Remedy: Check the brake for zero or abnormally low impedance. Then check the brake cable. Then check 200VAC. Then check servo amplifier or emergency stop control PCB if brake ports are used. Refer to the maintenance manual for details.
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 SRVO-208 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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