Code Er-09: Acceleration Error (detected only during Rotational Auto-Tuning)
Issue Description & Safety Warning
The Yaskawa V1000 AC Drive has triggered a critical Acceleration Error (detected only during Rotational Auto-Tuning) 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: Auto-tuning fault/alarm Manual section: Yaskawa V1000 Troubleshooting The motor did not accelerate for the specified acceleration time. - Increase the acceleration time (C1-01). - Check if it is possible to disconnect the machine from the motor. Torque limit when motoring is too low (L7-01 and L7-02). - Check the settings of parameters L7-01 and L7-02. - Increase the setting.
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 Er-09 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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