Code oL2: Drive Overload
Issue Description & Safety Warning
The Yaskawa A1000 AC Drive has triggered a critical Drive Overload 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: Fault Manual section: Yaskawa A1000 Troubleshooting Load is too heavy. Reduce the load. Acceleration or deceleration times are too short. Increase the settings for the acceleration and deceleration times (C1-01 through C1-08). V/f characteristics (voltage) are not suitable Set the V/f pattern setting parameters (E1-04 to E1-10) to match the motor characteristics. Drive capacity is too small. Replace the drive with a larger model. Overload occurred when operating at low speeds. - Reduce the load when operating at low speeds. - Replace the drive with a model that is one frame size larger. - Lower the carrier frequency (C6-02). Excessive torque compensation. Reduce the torque compensation gain (C4-01) until there is no speed loss but less current. Speed Search related parameters are set incorrectly. - Check the settings for all Speed Search related parameters. - Adjust the current used during Speed Search and the Speed Search deceleration time (b3-03 and b3-02 respectively). - After Auto-Tuning the drive, enable the Speed Estimation Speed Search (b3-24 = 1). Output current fluctuation due to input phase loss Check the power supply for phase loss.
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 oL2 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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