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F3

Outdoor Unit Protection Device Connector Open

Mitsubishi Electric · PAR-21MAA MA Remote Controller

Was bedeutet F3 ?

A protection device connector on the outdoor unit is open, preventing proper system operation and communication. This leads to the remote controller displaying 'PLEASE WAIT'. The outdoor board LED will blink green once and red twice alternately after system startup.

Häufige Ursachen

  • Open circuit detected at the outdoor unit's protection device connector.
  • Loose or disconnected wiring at the protection device terminal.
  • Faulty protection device requiring replacement.
  • Internal wiring break within the outdoor unit to the protection device.

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Locate and visually inspect all protection device connectors on the outdoor unit for disconnections or looseness.

  2. 2

    Securely reconnect any identified open protection device connectors on the outdoor unit.

Alle Codes in diesem Handbuch durchsuchen (26)
Verifizierte technische Daten. Zuletzt aktualisiert: March 2026

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Quelle: Mitsubishi Electric PAR-21MAA MA Remote Controller