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Left/Upper lamp blinks 5-time blink, 2.5-second OFF

Left/Upper lamp blinks 5 times with a 2.5-second pause — Outdoor power system fault

Mitsubishi Electric · Air Conditioning

¿Qué significa Left/Upper lamp blinks 5-time blink, 2.5-second OFF ?

The outdoor unit's power system has detected an issue. This occurs if the compressor protection (overcurrent or startup failure) trips 3 times within 1 minute of startup.

Causas comunes

  • Outdoor unit overcurrent protection activated
  • Outdoor unit startup failure protection activated
  • Faulty outdoor power system

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Refer to the outdoor unit's service manual for checks on the inverter and compressor.

  2. 2

    Check the stop valve on the outdoor unit.

  3. 3

    If the problem is related to the power system, professional service may be required.

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 21)Buscar más códigos en este manual