Power section – Warning

What does F23.1 mean?

A fault with a 'warning' response has occurred within the power section of the device. This indicates an underlying issue that could degrade drive performance, reduce reliability, and potentially escalate to a full operational fault if ignored.

• Elevated operating temperature of IGBTs or other power components due to sustained heavy load or inadequate cooling.
• Minor imbalance in the DC link voltage or current ripple, indicating early signs of capacitor degradation.
• Transient overcurrents or voltage spikes on the output stage that are near the warning threshold.
• Internal monitoring circuit detecting a parameter drift (e.g., gate driver voltage) that is not yet critical.
• Aging or reduced efficiency of the cooling fan operating below optimal speed.

Click steps to track your progress.

1. 1

   Monitor the drive's internal temperature sensors (e.g., Parameter P7-02, P7-03) and ensure ambient operating temperature is within specification.

2. 2

   Check the DC link voltage (e.g., Parameter P7-01) for stability and excessive ripple during operation with a multimeter in AC mode.

3. 3

   Reduce the motor load or adjust acceleration/deceleration ramps (e.g., Parameter P3-04, P3-05) to mitigate transient stress on the power section.

4. 4

   Visually inspect the power section for signs of discoloration, bulging components, or loose connections on the heatsink.

5. 5

   Verify the cooling fan is operating at its commanded speed (e.g., Parameter P7-01 or fan speed diagnostics) and not restricted by debris.