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COMM FAIL

COMM FAIL — Communications Failure Alert

Carrier · 38AP Air Handler

¿Qué significa COMM FAIL ?

Communication between the scrolling marquee and the Main Base Board (MBB) has been lost. If the communication loss is internal to the MBB, the unit will shut down or not start. The alert resets automatically once communications are re-established.

Causas comunes

  • Loss of communication between marquee and MBB
  • Internal MBB communication fault
  • Wiring issue between components

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Check wiring connections between the scrolling marquee and the MBB.

  2. 2

    Ensure both the marquee and MBB are powered on.

  3. 3

    If communication is internal to the MBB, further diagnostics are needed.

  4. 4

    The alert should reset automatically once communication is restored.

Ver todos los códigos en este manual (60)
Datos técnicos verificados. Última actualización: April 2026

Fallas relacionadas

A051A051 — Circuit A, Compressor 1 Stuck On Failure AlarmA052A052 — Circuit A, Compressor 2 Stuck On Failure AlarmA053A053 — Circuit A, Compressor 3 Stuck On Failure Alarm
Fuente: Carrier 38AP Air Handler
Open Manual (Page 163)Buscar más códigos en este manual