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U6

Outdoor Board LED1 (green) blinks four times and LED2 (red) blinks two times alternately - Abnormality of current sensor (P.B.)

MHI · Air Conditioning

Was bedeutet U6 ?

During startup or operation, the outdoor unit's LED1 (green) blinks four times and LED2 (red) blinks two times alternately, indicating an abnormality of the current sensor on the P.B. board.

Häufige Ursachen

  • Abnormality of current sensor (P.B.).
  • Faulty current sensor.
  • Wiring issue to the current sensor.

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Check the wiring of CN52C and CNAF for secure and correct connections.

  2. 2

    Ensure that the current sensor itself is properly installed and not physically damaged.

  3. 3

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

  4. 4

    If the issue persists, the current sensor or P.B. board may need to be inspected by a technician.

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 60)Mehr Codes in diesem Handbuch suchen