CodeRegistry
Marcas
  1. Inicio
  2. Mitsubishi Electric
  3. Air Conditioning
  4. Upper lamp blinks 3 times, lower lamp lights on
About·Privacy·Terms

CodeRegistry — Tu biblioteca global de soluciones técnicas.

Por su seguridad, siga siempre los manuales oficiales del fabricante. CodeRegistry es un sitio independiente y no está afiliado a las marcas citadas.

Upper lamp blinks 3 times, lower lamp lights on

Upper lamp blinks 3 times, lower lamp lights on — Refrigerant leak detected

Mitsubishi Electric · Air Conditioning

¿Qué significa Upper lamp blinks 3 times, lower lamp lights on ?

This indicates a potential refrigerant leak detected by the sensor. The unit may emit a buzzer sound, and the fan will operate for an extended period. It cannot be controlled by the remote.

Causas comunes

  • Refrigerant is leaking from the indoor unit piping or heat exchanger.
  • Certain substances like sprays (LP gas, propane, butane), aerosols, alcohol, or charcoal are used near the indoor unit.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Press and hold the emergency operation button to silence the buzzer.

  2. 2

    Open windows to ventilate the room.

  3. 3

    After fan operation finishes (approx. 7 hours), turn off the main power breaker.

  4. 4

    Inspect the indoor unit for the source of the refrigerant leak and repair it.

  5. 5

    If the problem continues after repair, replace the refrigerant sensor.

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 41)Buscar más códigos en este manual