F7
Airwell Indoor Display Board / Communication Fault

Indoor unit displays F7; unit may not respond correctly to remote commands or may operate erratically.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Loose connection between display board and main PCB, Faulty display PCB, Damaged communication cable between boards, Voltage surge damage

How to Fix / Troubleshooting

Safety: Turn off power at the breaker before removing any covers.

Steps:

  • 1. Access display board: Open the front panel and remove the decorative cover to expose the display/receiver board.
  • 2. Check connectors: Locate the ribbon cable or small harness connecting the display board to the indoor main PCB. Reseat both ends.
  • 3. Inspect for damage: Look for cracked solder joints, burnt components, or moisture on the display board.
  • 4. Test remote reception: After reseating connectors, restore power and test remote control operation. If F7 persists, the display board may be faulty.
  • 5. Replace display board: Order a compatible Airwell display/receiver PCB for your model. Swap the board, transferring any IR receiver window or LED light guides as needed.
  • 6. If still faulty: The indoor main PCB may have a communication fault and require replacement.
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Repair Difficulty

Medium 3/5

Required Part

Indoor Display / Receiver PCB
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