Code SRVO-045: HCAL alarm(Group:%d Axis:%d)
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical HCAL alarm(Group:%d Axis:%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: An excessively high current flowed through the main circuit of the servo amplifier. Remedy: Turn off the controller power, and disconnect the power cable from the servo amplifier indicated by the alarm message. Also disconnect the brake cable to avoid the axis falling unexpectedly. 1. In the above condition, supply controller power again and check if this alarm occurs again. If this alarm occurs again, replace the servo amplifier. 2. About the power cable, check the insulation of their U, V, W and the GND lines each other. If there is a short-circuit, replace the power cable. 3. About the power cable, measure the resistance between their U and V,V and W and W and U with an ohmmeter that has a very low resistance range. If the resistances at the three places are different from each other, the motor, the power cable is defective. Check each item in detail and replace it if necessary. Refer to the Controller Maintenance Manual for more information.
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-045 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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