29

Thermistor fault

Vacon · NX Liquid-Cooled Drive

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.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

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

  2. 4

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

Source: Vacon NX Liquid-Cooled Drive
Open Manual (Page 154)