Over Current

What does 13 mean?

The inverter's peak current limit has been exceeded, indicating a sudden and excessive surge in current. This is a critical fault often caused by a short circuit in the motor or its cabling, or an extremely sudden and heavy load application, which can damage the drive's output stage.

• Short circuit between two motor phases (U-V, V-W, U-W) or from a motor phase to ground within the motor windings or cable.
• Sudden, severe mechanical overload causing an instantaneous current surge (e.g., motor shaft jam).
• Motor cable insulation breakdown leading to arcing between phases or to ground.
• Drive's internal current measurement circuit failure or sensor fault.
• Parameter P1-08 (Overload trip current) set too low or P1-02 (Acceleration ramp) too short for the load.

Click steps to track your progress.

1. 1

   Disconnect the motor cables from the drive's output terminals (U, V, W) and power cycle the drive to see if the fault clears.

2. 2

   Perform an insulation resistance test on the motor cables from each phase (U, V, W) to ground and between phases, expecting >1 Megaohm.

3. 3

   Measure the resistance between each motor phase (U-V, V-W, U-W) at the motor terminals, verifying they are balanced and within expected values (e.g., <1 Ohm for large motors).

4. 4

   Increase the acceleration ramp time (P1-02) if the fault occurs during startup, to reduce inrush current.

5. 5

   Check for mechanical binding or seizure in the driven equipment that could cause an immediate high current draw.