Code oL1 (Fault): Motor Overload
Issue Description & Safety Warning
The Yaskawa V1000 AC Drive has triggered a critical Motor 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 V1000 Troubleshooting Cycle times are too short during acceleration and deceleration. Increase the acceleration and deceleration times (C1-01 through C1-08). - Drive overloaded at low speeds. - Overload may occur at low speeds when using a general-purpose motor, even if operating within the rated current limitation. - Reduce the load. - Increase the speed. - If the drive is supposed to operate at low speeds, either increase the motor capacity or use a motor specifically designed to operate with the drive. Although a special type of motor is being used, the motor protection selection is set for a general-purpose motor (L1-01 = 1). Set L1-01 to 2.
Source: Yaskawa AC Drive V1000 Compact Vector Control Drive Technical Manual (SIEP C710606 19D)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Yaskawa V1000 AC Drive Alarms
Yaskawa controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code oL1 (Fault) on the V1000 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: 153 Yaskawa V1000 AC Drive codes.
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