Heatsink sensor fault

What does 39 mean?

The frequency converter is not receiving a temperature signal from the heatsink sensor, specifically the IGBT thermal sensor on the power card. This loss of feedback means the drive cannot monitor critical internal temperatures, posing a significant risk of overheating and damage to the power semiconductors if not resolved.

Complete Troubleshooting Guide

1. 1

   Inspect the ribbon cable that connects the power card and the gate drive card for any signs of damage, pinching, or loose connections.

2. 2

   Check the functionality of the IGBT thermal sensor itself, if accessible, for defects.

3. 3

   Verify the integrity and connections of the gate drive card, as it processes the sensor signal.

4. 4

   If all previous checks are inconclusive, the power card itself may be defective and require replacement.