Motor data entered during Auto-Tuningwas incorrect.• Enter the correct data.• Restart Auto-Tuning and enter the correct information.Auto-Tuning did not complete withindesignated time frame. • Check and correct faulty motor wiring.• Disconnect the motor from machine and perform Rotational Auto-Tuning.Drive-calculated values outsideparameter setting range.LED Operator Display Error NameEr-05 No-Load Current ErrorCause Possible SolutionsMotor data entered during Auto-Tuningwas incorrect.• Enter the correct data.• Restart Auto-Tuning and enter the correct information.Auto-Tuning did not complete withindesignated time frame. • Check and correct faulty motor wiring.• Disconnect the motor from machine and perform Rotational Auto-Tuning.Drive-calculated values outsideparameter setting range.LED Operator Display Error NameEr-08 Rated Slip ErrorCause Possible SolutionsMotor data entered during Auto-Tuningwas incorrect.• Enter the correct data.• Restart Auto-Tuning and enter the correct information.Auto-Tuning did not complete withindesignated time frame. • Check and correct faulty motor wiring.• Disconnect the motor from machine and perform Auto-Tuning.Values calculated by the drive are outsidethe allowable parameter setting ranges.LED Operator Display Error NameEr-09 Acceleration Error (detected only during Rotational Auto-Tuning)Cause Possible SolutionsThe motor did not accelerate for thespecified 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.LED Operator Display Error NameEr-11 Motor Speed Fault (detected only when Auto-Tuning is enabled)Cause Possible SolutionsTorque reference is too high. (Enabled inOLV only.)• Increase the acceleration time (C1-01).• Disconnect the machine from the motor, if possible.LED Operator Display Error NameEr-12 Current Detection ErrorCause Possible SolutionsOne of the motor phases is missing (U/T1,V/T2, W/T3). Check motor wiring and correct problems.Current exceeded the current rating of thedrive. • Check the motor wiring for a short between motor lines.• If a magnetic contactor is used between motors, ensure it is on.• Replace the drive.The current is too low.Attempted Auto-Tuning without motorconnected to the drive. Connect the motor and perform Auto-Tuning.Current detection signal error. Replace the drive.6.7 Auto-Tuning Fault Detection278 YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
