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Outdoor control P.C. board LED is Lit

Outdoor LED is Lit — Abnormal communication or not connected

Mitsubishi Electric · Air Conditioning

Was bedeutet Outdoor control P.C. board LED is Lit ?

The LED on the outdoor control P.C. board is lit, which indicates abnormal communication or that the unit is not connected. This differs from normal blinking.

Häufige Ursachen

  • Communication failure
  • Unit not properly connected
  • Faulty communication component on the outdoor board

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Check the communication status LEDs on both indoor and outdoor units.

  2. 2

    Ensure all communication cables are securely connected.

  3. 3

    Refer to the outdoor unit service manual for further diagnostics related to LED indicators.

  4. 4

    Reset the unit by cycling the power.

Alle Codes in diesem Handbuch durchsuchen (170)
Verifizierte technische Daten. Zuletzt aktualisiert: April 2026

Verwandte Fehlercodes

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)
Quelle: Mitsubishi Electric Air Conditioning
Open Manual (Page 30)Mehr Codes in diesem Handbuch suchen