POWER lamp 3-time flash (2.5-second OFF) — Serial signal not received from outdoor unit (recall mode)

What does POWER lamp 3-time flash (Recall) - Serial Signal mean?

When in failure mode recall function, the POWER lamp flashes three times, followed by a 2.5-second OFF period. This indicates that the serial signal from the outdoor unit has not been received for a maximum of 6 minutes.

• Communication error between indoor and outdoor units
• Miswiring of serial signal

Click steps to track your progress.

1. 1

   Refer to 10-6. 'How to check miswiring and serial signal error' (further details may require an installer).

2. 2

   Check the indoor/outdoor connecting wire for proper connection and integrity.

3. 3

   Release the failure mode recall function by cycling power or pressing the remote controller's RESET button.