Cause: Power module temperature comes when the temperature of the power module within the SINAMICS drive is approaching its limit.

power module temp a29 indicates power module temperature alarm. This means the temperature of the power module has exceeded its safe operating limit.

Troubleshooting Steps:

Follow these steps to correct power module temp a29:

• Check Ambient Temperature: Verify that the ambient temperature around the drive is within the specified operating range. Improve ventilation if necessary.
• Inspect Cooling: Ensure all air vents on the drive and cabinet are clean and unobstructed.
• Check Fan Operation: Verify that the fan inside the drive is running smoothly. Also, check any external cabinet cooling fans. Replace faulty fans.
• Check Motor Load: Investigate if the motor is overloaded. Reduce the load if necessary.
• Clean Heat Sink: If accessible and safe to do so, carefully clean the heat sink of the power module.