Output Current Detection Value Exceeded

What does Output current detection value exceeded mean?

The output current has exceeded the detection level set in a parameter. This functions as a protective measure to prevent overcurrent conditions that could damage the motor or the inverter's power components. Incorrect parameter settings can trigger this unnecessarily, or it could indicate an actual motor overload or short circuit condition.

• Instantaneous overcurrent condition due to a sudden heavy load surge or mechanical jam.
• Short circuit between output phases (U, V, W) or a phase-to-ground fault in the motor or motor cable.
• Current detection circuit on the inverter's power board malfunctioning, providing false readings.
• Incorrect motor parameters (e.g., Pr. 03, Pr. 09, Pr. 71) causing over-excitation or improper control.
• Output current detection threshold (often an internal, non-adjustable safety limit) is reached.

Click steps to track your progress.

1. 1

   Disconnect the motor and measure resistance between motor phases (U-V, V-W, W-U) and each phase to ground (expect >20 Mohm).

2. 2

   Use a clamp meter to measure actual motor current during operation and compare to the inverter's displayed current and motor FLC (Full Load Current).

3. 3

   Verify that the motor parameters (Pr. 03, Pr. 09, Pr. 71) are correctly set according to the motor nameplate.

4. 4

   Check for any mechanical binding or excessive load on the driven equipment that would cause high current draw.

5. 5

   Inspect inverter output terminals (U, V, W) and motor terminal box for loose or shorted connections.