6.7 Auto-Tuning Fault Detection
268 YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
LED 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 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.
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