Heatsink Overheat

What does oH mean?

The temperature of the drive's heatsink has exceeded its safe operating limit. This indicates insufficient cooling for the drive's power components.

Click steps to track your progress.

1. 1

   Inspect the drive's heatsink fins and cooling fan for dust, debris, or obstructions.

2. 2

   Verify the cooling fan's functionality and free rotation when the drive is powered on.

3. 3

   Measure the ambient temperature within the drive's enclosure and verify it is within the specified operating range.

4. 4

   Monitor the drive's output current (U1-01) on the display and compare it against the motor and drive rated currents for potential overload.

5. 5

   Verify drive parameters such as carrier frequency (C1-01) and motor full load current (E1-04) against application requirements.