1

Overcurrent

Vacon · NX All-in-One Application

What does 1 mean?

A hardware trip (S1) has detected excessively high current (>4 times nominal current) in the motor cable, potentially due to a sudden heavy load, a short circuit in the motor cables, or an incorrectly matched motor. Other subcodes (S3, S4) indicate current controller supervision issues or an exceeded user-configured limit.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Visually inspect the motor cables for damage, proper routing, and verify all connections are secure and free of short circuits.

  2. 4

    Perform an identification run to ensure the drive's motor parameters are accurately tuned to the connected motor.

Source: Vacon NX All-in-One Application
Open Manual (Page 371)