Code HCA: Current Alarm
Issue Description & Safety Warning
The Yaskawa A1000 AC Drive has triggered a critical Current Alarm 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
Code type: Alarm / minor fault Manual section: Yaskawa A1000 Troubleshooting Load is too heavy. Either reduce the load for applications with repetitive operation (repetitive stops and starts, etc.), or replace the drive. Acceleration and deceleration times are too short. - Calculate the torque required during acceleration and for the inertia moment. - If the torque level is not right for the load, take the following steps: - Increase the acceleration and deceleration times (C1-01 through C1-08). - Increase the capacity of the drive. A special-purpose motor is being used, or the drive is attempting to run a motor greater than the maximum allowable capacity. - Check the motor capacity. - Use a motor appropriate for the drive. Ensure the motor is within the allowable capacity range. The current level increased due to Speed Search after a momentary power loss or while attempting to perform a fault restart. The alarm will appear only briefly. There is no need to take action to prevent the alarm from occurring in such instances.
Source: Yaskawa AC Drive A1000 High Performance Vector Control Drive Technical Manual (SIEP C710616 21H)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Yaskawa A1000 AC Drive Alarms
Yaskawa controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code HCA on the A1000 AC Drive identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Yaskawa's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 280 Yaskawa A1000 AC Drive codes.
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