YASKAWA V1000 Series

Cause Possible Solutions
One of the motor phases is missing (U/T1, V/T2, W/T3). Check motor wiring and correct problems.
Current exceeded the current rating 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 without motor connected to the
drive.
Connect the motor and perform Auto-Tuning.
Current detection signal error. Replace the drive.
LED 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.
• If possible, disconnect the motor from the load and perform Auto-Tuning.
The results from Auto-Tuning the no-load current
exceeded 80%.
LED 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.
• Motor data entered to the T1 parameters does not match the information written on the motor nameplate.
• Restart Auto-Tuning and enter the correct information.
Auto-Tuning calculated values outside the parameter
setting range, assigning the iron-core saturation
coefficient (E2-07, -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.
6.7 Auto-Tuning Fault Detection
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YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)