Motor Overload (Electronic Thermal)

What does OL1 mean?

The electronic thermal overload function estimates motor temperature based on inverter output current and time. When this function is activated, an OL1 error occurs, shutting OFF the inverter output to prevent excessive motor overheating. Persistent overload significantly reduces motor lifespan and can cause winding insulation failure.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Inspect the motor's cooling fan and ensure proper ventilation around the motor.

2. 4

   Measure the actual motor current during operation to confirm it is not consistently exceeding the motor's rated current.

3. 5

   Ensure the motor is not undersized for the application.