Overcurrent
Vacon · NX Liquid-Cooled Drive
What does 1 mean?
The AC drive has detected an excessively high current, exceeding 4 times the nominal current (4*IH), in the motor cables. This condition typically results from a sudden heavy increase in mechanical load, a short circuit within the motor cables, or the use of an unsuitable motor for the application. Subcode S1 indicates a hardware trip, while S3 points to current controller supervision.
Common Causes
- Motor load exceeding rated capacity.
- Mechanical binding or seizure in the driven equipment.
- Incorrect motor or drive sizing for the application.
- Short circuit in motor windings or power cables.
- Parameter P1-02 (Max current) set too low.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check the mechanical loading on the motor shaft to ensure it is within expected limits.
- 2
Inspect the motor for any signs of damage or malfunction, and verify its suitability for the connected load.
- 3
Verify the integrity of the motor cables for any signs of insulation failure or short circuits between phases or to ground.