YASKAWA A1000 Series

Digital Operator Display Error Name
Er-12 Current Detection Error
Cause Possible Solutions
One of the motor phases is missing:
(U/T1, V/T2, W/T3).
Check motor wiring and correct any problems.
The current exceeded the current rating of
the drive.
• Check motor wiring for a short between motor lines.
•
Close any magnetic contactors used between motors.
• Replace the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or a Yaskawa representative.
The current is too low.
Attempted Auto-Tuning without motor
connected to the drive.
Connect the motor and restart Auto-Tuning.
Current detection signal error.
Replace the control board or the entire drive. For instructions on replacing the control board, contact Yaskawa
or a Yaskawa representative.
5.5 Auto-Tuning Fault Detection
208
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide