BC IGBT excess temperature

What does 7192 mean?

The IGBT within the brake chopper has overheated beyond its internal fault limit, often due to high ambient temperatures, cooling fan failure, or excessive braking cycles. This fault protects the IGBT from permanent damage but requires investigation into the cooling system or operational demands.

• High ambient temperature in the control cabinet exceeding the drive's operating specifications (e.g., >50°C).
• Failure of the brake chopper's dedicated cooling fan or blockages in its heatsink fins.
• Excessive and continuous regenerative braking cycles, leading to prolonged heat generation in the IGBT.
• Inadequate spacing or ventilation within the enclosure housing the drive and brake chopper.
• Drive parameter P4-04 (Brake Chopper Thermal Model) set incorrectly for the application.

Click steps to track your progress.

1. 1

   Allow the drive to cool down. Verify the ambient temperature inside the control cabinet does not exceed the drive's rating (e.g., 40°C or 50°C).

2. 2

   Check for proper operation of the brake chopper's cooling fan (if external) or the drive's internal fans. Clear any dust or debris from heatsinks.

3. 3

   Evaluate the application's braking duty cycle and ensure it is within the drive's specifications for regenerative energy dissipation.

4. 4

   Measure the internal temperature of the drive or brake chopper (if accessible with an IR thermometer).

5. 5

   Adjust the drive's brake chopper thermal model parameter (P4-04) if the factory default is not optimal for specific duty cycles.