1

Over-current at Power Running (ECM)

Fanuc · A20B-2101-0390 αi series AC Servo Motor and Spindle

What does 1 mean?

An over-current condition has occurred in the DC link during power running operation of the motor. This indicates excessive current draw, potentially due to motor load or amplifier issues.

Repair Steps

  1. 1

    Check the motor load during power running operation. Reduce if excessive.

  2. 2

    Inspect the servo amplifier for any over-current related alarms.

  3. 3

    Verify the DC link current sensors for proper operation.

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Verified technical data. Last updated: March 2026
Source: Fanuc A20B-2101-0390 αi series AC Servo Motor and Spindle
Fanuc Error 1: Over-current at Power Running (ECM) — Troubleshooting Guide | ErrorLib