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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

¿Qué significa 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.

Causas comunes

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

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  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.

Ver todos los códigos en este manual (124)
Datos técnicos verificados. Última actualización: April 2026

Fallas relacionadas

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
Fuente: MHI Air Conditioning
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