65

Control card over temperature

Danfoss · VLT HVAC-FC 102 Frequency Converter

What does 65 mean?

The control card temperature has reached its cut-out limit of 80 °C, indicating excessive heat within the control section of the frequency converter. This can lead to erratic behavior, reduced lifespan, or permanent damage to the control card if not addressed. Proper cooling is essential for its reliability.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Verify the proper operation of all cooling fans responsible for airflow to the control card/enclosure.

  2. 4

    If other steps fail, perform diagnostics on the control card itself for potential defects.

Source: Danfoss VLT HVAC-FC 102 Frequency Converter
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