17

Control Word Timeout

Danfoss · VLT HVAC Drive FC 102

What does 17 mean?

The drive has not received a valid control word from the external controller (e.g., PLC via fieldbus) within the expected timeframe. This indicates a communication failure, causing the drive to stop or trip for safety reasons.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Check the operational status of the external controller or fieldbus master to ensure it is sending commands.

Source: Danfoss VLT HVAC Drive FC 102
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