Overcurrent Protection During Acceleration

What does E03. mean?

An overcurrent trip during motor acceleration signifies an excessive current draw, often caused by rapid acceleration times, a locked rotor condition, or improperly tuned torque boost parameters. The inverter detects this condition when output current reaches approximately 200% of its rated value, leading to a shutdown to protect the main power elements.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If torque boost is enabled, decrease the torque boost setting (A041/A241, A042/A242) to an appropriate level.

2. 4

   For PM motors, ensure motor parameters (H003/H203, H004/H204, H105, H123) are correctly set and adjusted according to the motor specifications.