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38.0

Internal Fault: Serial port initialization error

Danfoss · VLT HVAC Drive FC 102

¿Qué significa 38.0 ?

The internal serial communication port failed to initialize upon power-up or during operation. This can prevent communication with the LCP or external serial devices, indicating a possible internal hardware or firmware issue with the control board.

Causas comunes

  • Local Control Panel (LCP) connection issues; LCP cable is damaged or not fully seated.
  • Faulty LCP module preventing proper communication with the drive's control board.
  • Internal serial communication hardware (UART chip) on the control board has failed.
  • Severe EMI interfering with the internal serial communication lines during initialization.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    1. Power down the drive, then remove and firmly re-seat the LCP on its connector.

  2. 2

    2. Attempt to operate the drive with a different, known-good LCP, if available, to rule out LCP module failure.

  3. 3

    3. Visually inspect the LCP connector on the control board for bent pins or signs of damage.

  4. 4

    4. If the fault persists, replacement of the control board is likely required due to internal serial port hardware failure.

Ver todos los códigos en este manual (75)
Datos técnicos verificados. Última actualización: March 2026

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Fuente: Danfoss VLT HVAC Drive FC 102