Power unit: Overtemperature thermal model

What does A05006 mean?

This alarm indicates that the calculated temperature difference between the power chip and the heat sink has exceeded the permissible limit, primarily for blocksize power units. It signifies a potential thermal imbalance or overload condition that, if not self-corrected, can lead to fault F30024. The drive initiates an appropriate overload response based on p0290.

• Incorrect thermal model parameters (e.g., P0610, P0611) configured, not accurately reflecting the actual power unit's thermal characteristics.
• Inadequate cooling efficiency due to partially obstructed heatsink fins or reduced airflow within the power unit.
• Ambient temperature at the drive's location exceeding specified design limits for extended periods.
• Prolonged motor overload condition leading to increased power dissipation and heat generation in the power chips.

Click steps to track your progress.

1. 1

   Verify that parameters P0610 (Thermal model time constant) and P0611 (Thermal model gain) match the drive's specific blocksize and unit type.

2. 2

   Inspect the heatsink for dust accumulation and ensure cooling airflow is unobstructed within the power unit.

3. 3

   Monitor the internal drive temperature (r0037) and compare with the alarm threshold to understand heating trends.

4. 4

   Measure motor current (r0027) and ensure it's consistently within the drive's continuous current rating to prevent excessive heat generation.

5. 5

   Confirm the drive's mounting orientation is correct according to the manual for optimal cooling fan operation.