Motor Temperature Sensor (TF) Trip

What does 31 mean?

This fault occurs when the temperature sensor (TF) in either drive 1 or drive 2 is triggered, indicating an overtemperature condition in the respective motor. Common causes include excessive motor load, high ambient temperatures, inadequate motor cooling, or a faulty sensor itself providing an incorrect reading. Operating a motor above its rated temperature severely shortens its lifespan, degrades winding insulation, and risks permanent motor damage, necessitating immediate attention.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Improve ventilation around the motor and ensure the ambient temperature in its operating environment is within specified parameters.

2. 4

   Allow the motor to cool down completely to its normal operating temperature before attempting to reset the error, to prevent immediate re-tripping.