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  1. Working on multiple fujitsu halcyon dc inverter systems and the operation light it blinking. The operation light blinks 3 times ,no other lights are blinking

    1. If the operation light on your Fujitsu Halcyon DC inverter system is blinking three times and no other lights are blinking, it usually indicates a communication error between the indoor and outdoor units

  2. Gary Chalk says:

    Op light and timer light is blinking 4 to 5 times each.
    Then it cools fine without flashing for about 10 minutes then starts doing it again.

  3. Unit blinking 8 green, 6 red. Any ideas? Thank you very much.

    1. Hi,
      According to the Fujitsu Halcyon error codes, 8 green and 6 red flashes indicate a power failure.

      This could be caused by a number of things, including a power outage, a faulty wiring connection, or even an obstruction in one of the vents.

      I hope this helps!

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