Thermistor fault

What does 29 mean?

The thermistor input on an option board has detected an increase in motor temperature beyond safe limits, or the input itself is not properly terminated if unused. This indicates potential motor overload or inadequate motor cooling. Overheating can severely damage the motor windings, reduce motor lifespan, and lead to efficiency losses.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Inspect the thermistor connections to the option board for looseness or damage.

2. 4

   If the thermistor input of the option board is not in use, ensure it is correctly short-circuited as per the manual's instructions.