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  3. Air Conditioning
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Operation Indicator Lit

OPERATION INDICATOR lamp is lit — Unit is operating to reach set temperature

Mitsubishi Electric · Air Conditioning

¿Qué significa Operation Indicator Lit ?

The air conditioner is actively running to adjust the room temperature to your desired setting. This light indicates normal operation is in progress.

Causas comunes

  • Unit is in COOL, HEAT, or DRY mode
  • Room temperature is significantly different from the set temperature

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Confirm the desired mode (COOL, HEAT, DRY) is selected on the remote controller.

  2. 2

    Check that the set temperature is appropriate for the current room conditions.

  3. 3

    Ensure the unit is not in standby mode (unless it's a multi-system operation).

Ver todos los códigos en este manual (170)
Datos técnicos verificados. Última actualización: April 2026

Fallas relacionadas

0.5-second ON / 0.5-second OFF blinkUpper lamp blinks 0.5-second ON/OFF - Miswiring or serial signal error00Normal operation - No error codes1 beep during error display mode1 beep during error display mode - Unit has an error (different code)
Fuente: Mitsubishi Electric Air Conditioning
Open Manual (Page 13)Buscar más códigos en este manual