6.6 Auto-Tuning Fault Detection
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual 307
6.6 Auto-Tuning Fault Detection
Auto-Tuning faults in this section are displayed on the digital operator and will cause the motor to coast to a stop.
Auto-Tuning faults do not trigger a multi-function digital output set for fault or alarm output.
An End error on the digital operator display indicates Auto-Tuning has successfully completed with discrepancies in
the calculations. Check the cause of the End error using the tables in this section and perform Auto-Tuning again after
fixing the cause.
The drive may be used in the application if no cause can be identified despite the existence of an End error.
An Er error indicates that Auto-Tuning has not completed successfully. Check for the cause of the error using the tables
in this section, and perform Auto-Tuning again after fixing the cause.
◆ Auto-Tuning Codes, Causes, and Possible Solutions
Table 6.11 Auto-Tuning Codes, Causes, and Possible Solutions
Digital Operator Display Error Name
End1 Excessive V/f Setting (detected only during Rotational Auto-Tuning, and displayed after Auto-Tuning is complete)
Cause Possible Solutions
The torque reference exceeded 20% during
Auto-Tuning.
• Before Auto-Tuning the drive, verify the information written on the motor nameplate and enter that data to T1-03 through T1-05.
• Enter proper information to parameters T1-03 to T1-05 and repeat Auto-Tuning.
The results from Auto-Tuning the no-load current
exceeded 80%.
Digital Operator Display Error Name
End2 Motor Iron-Core Saturation Coefficient (detected only during Rotational Auto-Tuning and displayed after Auto-Tuning is complete)
Cause Possible Solutions
Motor data entered during Auto-Tuning was
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 the parameter
setting range, assigning the iron-core saturation
coefficient (E2-07, E2-08) a temporary value.
Check and correct faulty motor wiring.
Digital Operator Display Error Name
End3 Rated Current Setting Alarm (displayed after Auto-Tuning is complete)
Cause Possible Solutions
The correct current rating printed on the nameplate
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 Name
End4 Adjusted Slip Calculation Error
Cause Possible Solutions
The slip that was calculated is outside the allowable
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 Name
End5 Resistance Tuning Error
Cause Possible Solutions
The resistance value that was calculated is outside
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 Name
End6 Leakage Inductance Alarm
Cause Possible Solutions
A1-02 setting error
• Check the setting of parameter A1-02.
• Check the control mode and repeat Auto-Tuning.
The leakage inductance value that was calculated is
outside the allowable range.
Double-check the data that was entered for the Auto-Tuning process.
Digital Operator Display Error Name
End7 No-Load Current Alarm
Cause Possible Solutions
The entered no-load current value was outside the
allowable range.
Check and correct faulty motor wiring.
Auto-Tuning results were less than 5% of the motor
rated current.
Double-check the data that was entered for the Auto-Tuning process.
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