Current Detection Fault

What does Er - 12 mean?

This fault occurs during Auto-Tuning when the motor current exceeds its rated value or an open phase is detected on the U/T1, V/T2, or W/T3 output terminals. It suggests an issue with the motor connection, wiring, or an attempt to tune a loaded motor, which can skew current measurements.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify continuity of the motor connections at both the drive's output terminals and inside the motor's junction box using a multimeter to confirm proper connections.