Unit stops with F7, compressor may not start, indoor fan may run
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: This involves high‑voltage inverter electronics. Do not attempt internal PCB repairs yourself.
User‑level checks:
- Verify power supply: Ensure the AC has a dedicated circuit with correct voltage and no frequent brownouts.
- Visual inspection: With power OFF, inspect the outdoor PCB for burnt components or strong burnt smell. If present, do not power the unit again.
- Check wiring: Confirm compressor terminal cover is intact and wires are firmly connected (do not remove terminal cover if you are not trained).
Next steps: A technician should test compressor windings, inverter module, and replace the outdoor PCB or compressor as needed.
Repair Difficulty
Required Part
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