Over Current

What does 20 mean?

An overcurrent condition means the drive's output current to the motor has exceeded its maximum permissible limit. This is a critical fault that can damage the drive's power semiconductors (IGBTs) or the motor, and the drive will trip to protect itself.

• Sudden mechanical jam or overload of the connected motor and driven equipment.
• Motor cable insulation breakdown causing a phase-to-phase or phase-to-ground short circuit.
• Rapid acceleration time (Parameter P2-01) set too short for the motor and load inertia.
• Internal drive output IGBT failure causing a short circuit within the inverter section.
• Incorrect motor parameters (P5-01, P5-02) entered, leading to poor motor control and excessive current.

Click steps to track your progress.

1. 1

   Disconnect the motor from the drive output terminals (U, V, W).

2. 2

   Measure resistance between motor phases (U-V, V-W, W-U) and from each phase to ground with a multimeter (Expected: balanced resistance, infinite to ground).

3. 3

   Check for mechanical freedom of the driven equipment and motor shaft rotation.

4. 4

   Verify Parameter P2-01 (Acceleration Time) is set appropriately for the load inertia.

5. 5

   With the motor disconnected, perform a self-test or no-load run of the drive to isolate the fault.

6. 6

   Confirm Parameter P5-01 (Motor Rated Current) and P5-02 (Motor Rated Voltage) are correctly configured.