Cause Possible SolutionsMotor data entered duringAuto-Tuning was incorrect.• Motor data entered to T1 parameters does not match motor nameplate. Enter thecorrect data.• Restart Auto-Tuning and enter the correct information.Auto-Tuning did not completewithin designated time frame. • Check and correct faulty motor wiring.• Disconnect the motor from machine and perform Auto-Tuning.Values calculated by the driveare outside the allowableparameter setting ranges.Er-09 Acceleration Error (detected only during Rotational Auto-Tuning)Cause Possible SolutionsThe motor did not accelerate forthe 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 istoo low (L7-01 and L7-02).• Check the settings of parameters L7-01 and L7-02.• Increase the setting.Er-11 Motor Speed Fault (detected only when Auto-Tuning is enabled)Cause Possible SolutionsTorque reference is too high.(Enabled in OLV only.)• Increase the acceleration time (C1-01).• Disconnect the machine from the motor, if possible.Er-12 Current Detection ErrorCause Possible SolutionsOne of the motor phases ismissing (U/T1, V/T2, W/T3). Check motor wiring and correct problems.Current exceeded the currentrating of the drive. • 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 withoutmotor connected to the drive. Connect the motor and perform Auto-Tuning.Current detection signal error. Replace the drive.5.5 Auto-Tuning Fault Detection152 YASKAWA ELECTRIC TOEP C710606 47A YASKAWA AC Drive – V1000 Quick Start Guide
