Transistor Overtemperature

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The output transistors have exceeded their maximum operating temperature. This indicates that the power semiconductors are overheating, which can lead to premature failure of the drive.

• Internal temperature of the power transistor or IGBT exceeds limits.
• Inadequate heatsink cooling or fan failure.
• Excessive motor current causing transistor heating.
• High ambient temperature.

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1. 1

   Verify that the maximum ambient temperature around the drive enclosure has not been exceeded.

2. 2

   Check the operation of the cooling fan (e.g., for obstructions, wear, or failure).

3. 3

   Check for excess load on the motor, which would increase drive current and heat generation.