Thermistor fault

What does 29 mean?

The thermistor input on the OPT-AF option board has detected an increase in the motor temperature. Subcode S1 indicates activation on the OPT-AF board, while S2 applies to special application contexts.

• Thermistor sensor disconnected or shorted.
• Thermistor value outside acceptable range (P1-18).
• Faulty thermistor component (e.g., on motor or heatsink).
• Wiring issue to the thermistor input.

Click steps to track your progress.

1. 1

   Check motor cooling system for obstructions or malfunctions to ensure adequate heat dissipation.

2. 2

   Verify motor loading is within specified limits for the motor and drive combination.

3. 3

   Inspect the thermistor connection to the OPT-AF board for proper wiring and continuity.

4. 4

   If the thermistor input of the option board is not in use, ensure it is properly short-circuited.