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5.5 Auto-Tuning Fault Detection
5.5 Auto-Tuning Fault Detection
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Auto-Tuning Codes, Causes, and Possible Solutions
Table 5.5 Auto-Tuning Codes, Causes, and Possible Solutions
LED Operator Display Error Name
End1 Excessive V/f Setting. 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.
• If possible, disconnect the motor from the load and perform Auto-Tuning.
The no-load current exceeded
80% of the drive rated current
during Auto-Tuning.
LED Operator Display Error Name
End2
Motor Iron-Core Saturation Coecient. Detected only during Rotational
Auto-Tuning and displayed after Auto-Tuning is complete.
Cause Possible Solutions
Motor data entered during
Auto-Tuning was incorrect.
• Enter the correct data.
• Restart Auto-Tuning and enter the correct information.
Auto-Tuning calculated values
outside the parameter setting
range, assigning the iron-core
saturation coecient (E2-07, E2-
08) a temporary value.
• Check and correct faulty motor wiring.
• Disconnect the motor from machine and perform Rotational Auto-Tuning.
LED Operator Display Error Name
End3 Rated Current Setting Alarm (displayed after Auto-Tuning is complete).
Cause Possible Solutions
• The motor line-to-line
resistance and the
motor-rated current are not
consistent with one another.
• 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.
LED Operator Display Error Name
Er-01 Motor Data Error
Cause Possible Solutions
Auto-Tuning faults are shown below. When the following faults are detected, the fault is
displayed on the Digital Operator and the motor coasts to a stop. No fault or alarm outputs
will occur
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