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  4. RUN light blinks slowly (1.5 sec ON, 0.5 sec OFF)
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RUN light blinks slowly (1.5 sec ON, 0.5 sec OFF)

RUN light blinks slowly (1.5 sec ON, 0.5 sec OFF) during heating — Unit warming up or defrosting

MHI · Air Conditioning

¿Qué significa RUN light blinks slowly (1.5 sec ON, 0.5 sec OFF) ?

During heating operation, the unit temporarily stops blowing air or blows non-warm air, and the RUN light blinks with this pattern. This is normal during the 'HOT KEEP' program to warm up the indoor heat exchanger or during automatic defrosting.

Causas comunes

  • Indoor heat exchanger warming up (HOT KEEP program).
  • Automatic defrosting due to low outdoor temperature and high humidity.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Wait for 2 to 5 minutes for the indoor heat exchanger to warm up.

  2. 2

    Allow the unit to complete its automatic defrosting cycle if outdoor conditions are cold and humid.

  3. 3

    Observe if water or steam escapes from the outdoor unit during defrosting, which is a normal part of the process.

Ver todos los códigos en este manual (124)
Datos técnicos verificados. Última actualización: April 2026

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Fuente: MHI Air Conditioning
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