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E4, E5

Outdoor Board LED1 (green) blinks twice and LED2 (red) blinks seven times alternately - Remote controller signal receiving error is detected by remote controller

MHI · Air Conditioning

Was bedeutet E4, E5 ?

During startup or operation, the outdoor unit's LED1 (green) blinks twice and LED2 (red) blinks seven times alternately, indicating a remote controller signal receiving error detected by the remote controller itself.

Häufige Ursachen

  • Remote controller signal receiving error.
  • Noise entered into transmission wire of remote controller.
  • Incorrect type of remote controller (e.g., not MA remote controller PAR-21MAA).

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Check if the remote controller is the correct model (e.g., MA remote controller PAR-21MAA).

  2. 2

    Check if noise is entering into the transmission wire of the remote controller.

  3. 3

    Re-check the error by turning off the main power, waiting, and turning it back on.

Alle Codes in diesem Handbuch durchsuchen (124)
Verifizierte technische Daten. Zuletzt aktualisiert: April 2026

Verwandte Fehlercodes

00Outdoor Board LED only green lights up after startup - No outdoor unit of address 0 / Remote controller transmission wire open1OPERATION INDICATOR lamp blinks 1 time (Pattern A) - Indoor/outdoor unit communication error (Transmitting error - Outdoor unit)14OPERATION INDICATOR lamp blinks 14 times (Pattern A) - Other errors
Quelle: MHI Air Conditioning
Open Manual (Page 59)Mehr Codes in diesem Handbuch suchen