5.5 Auto-Tuning Fault DetectionWhen the Auto-Tuning faults shown below are detected, the fault is displayed on the digital operator and the motor coasts toa stop. Auto-Tuning faults do not trigger a multi-function terminal set for fault or alarm output.An Endo error indicates that although Auto-Tuning has successfully completed, there is some discrepancy in the calculations.If an Endo error occurs, check for the cause of the error using the table below, and perform Auto-Tuning again after fixingthe problem. Start the application if no problem can be diagnosed despite the existence of the Endo error.u Auto-Tuning Codes, Causes, and Possible SolutionsTable 5.5 Auto-Tuning Codes, Causes, and Possible SolutionsDigital Operator Display Error NameEnd1 Excessive V/f Setting (detected only during Rotational Auto-Tuning, and displayed after Auto-Tuning iscomplete)Cause Possible SolutionsThe torque reference exceeded 20% duringAuto-Tuning. • Before Auto-Tuning the drive, verify the information written on the motor nameplate and enter that datato T1-03 through T1-05.• Enter proper information to parameters T1-03 to T1-05 and repeat Auto-Tuning.• If possible, disconnect the motor from the load and perform Auto-Tuning. If the load cannot be uncoupled,simply use the Auto-Tuning results as they are.The results from Auto-Tuning the no-loadcurrent exceeded 80%.Digital Operator Display Error NameEnd2 Motor Iron-Core Saturation Coefficient (detected only during Rotational Auto-Tuning and displayed afterAuto-Tuning is complete)Cause Possible SolutionsMotor data entered during Auto-Tuningwas incorrect.• Make sure the data entered to the T1 parameters match the information written on the motor nameplate.• Restart Auto-Tuning and enter the correct information.Results from Auto-Tuning are outside theparameter setting range, assigning the iron-core saturation coefficient (E2-07, E2-08)a temporary value.• Check and correct faulty motor wiring.• Disconnect the motor from machine and perform Rotational Auto-Tuning.Digital Operator Display Error NameEnd3 Rated Current Setting Alarm (displayed after Auto-Tuning is complete)Cause Possible SolutionsThe correct current rating printed on thenameplate was not entered into T1-04.• Check the setting of parameter T1-04.• Check the motor data and repeat Auto-Tuning.Digital Operator Display Error NameEnd4 Adjusted Slip Calculation ErrorCause Possible SolutionsThe slip that was calculated is outside theallowable range.• Make sure the data entered for Auto-Tuning is correct.• Execute Rotational Auto-Tuning instead. If not possible, try Stationary Auto-Tuning 2.Digital Operator Display Error NameEnd5 Resistance Tuning ErrorCause Possible SolutionsThe resistance value that was calculated isoutside the allowable range.• Double-check the data that was entered for the Auto-Tuning process.• Check the motor and motor cable connection for faults.Digital Operator Display Error NameEnd6 Leakage Inductance AlarmCause Possible SolutionsThe leakage inductance value that wascalculated is outside the allowable range. Double-check the data that was entered for the Auto-Tuning process.Digital Operator Display Error NameEnd7 No-Load Current AlarmCause Possible SolutionsThe entered no-load current value wasoutside the allowable range. Check and correct faulty motor wiring.5.5 Auto-Tuning Fault Detection144 YASKAWA ELECTRIC TOEP C710616 41B YASKAWA AC Drive - A1000 Quick Start Guide
