6.7 Auto-Tuning Fault DetectionWhen the Auto-Tuning faults shown below are detected, the fault is displayed on the operator and the motor coasts to a 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 in this section, and perform Auto-Tuning again ormanually set the motor parameters after fixing the problem. Start the application if no problem can be diagnosed despite theexistence of the Endo error.u Auto-Tuning Codes, Causes, and Possible SolutionsTable 6.11 Auto-Tuning Codes, Causes, and Possible SolutionsHOA Keypad Display Error NameEnd3 Rated Current Setting Alarm (displayed after Auto-Tuning is complete)Cause Possible SolutionsThe correct current rating printed on the motornameplate was not entered into T1-04• Check the setting of parameter T1-04.• Check the motor data and repeat Auto-Tuning.HOA Keypad Display Error NameEnd4 Adjusted Slip Calculation ErrorCause Possible SolutionsThe calculated slip is outside the allowable range Make sure the data entered for Auto-Tuning is correct.HOA Keypad Display Error NameEnd5 Resistance Tuning ErrorCause Possible SolutionsThe calculated resistance value is outside theallowable range• Double-check the data entered for the Auto-Tuning process.• Check the motor and motor cable connection for faults.HOA Keypad Display Error NameEnd7 No-Load Current AlarmCause Possible SolutionsThe entered no-load current value was outside theallowable range Check and correct faulty motor wiring.Auto-Tuning results were less than 5% of themotor rated current Double-check the data entered for the Auto-Tuning process.HOA Keypad Display Error NameEr-01 Motor Data ErrorCause Possible SolutionsMotor data or data entered during Auto-Tuningwas incorrect.• Check that the motor data entered to T1 parameters matches motor nameplate input before Auto-Tuning.• Restart Auto-Tuning and enter the correct information.Motor output power and motor-rated currentsettings (T1-02 and T1-04) do not match• Check the drive and motor capacities.• Correct the settings of parameters T1-02 and T1-04.Motor rated current and detected no-load currentare inconsistent• Check the motor rated current and no-load current.• Correct the settings of parameters T1-04 and E2-03.Base frequency and motor rated speed (T1-05 andT1-07) do not match• Correct the settings of parameters T1-05 and T1-07.• Check that the correct number of poles were entered to T1-06.HOA Keypad Display Error NameEr-02 Minor FaultCause Possible SolutionsAn alarm was triggered during Auto-Tuning Exit the Auto-Tuning menu, check the alarm code, remove the alarm cause, and repeat Auto-Tuning.6.7 Auto-Tuning Fault Detection254 YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual
