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

What does U6 mean?

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.

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

Click steps to track your progress.

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.