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Edwin BrownSep 2, 2025
What does it mean if my Panasonic CS-E9NKUAW displays F99 (Output Over Current Detection)?
- AAmber HenrySep 2, 2025
If your Panasonic Air Conditioner shows error code F99, it indicates an output over current detection. This can be caused by a DC peak due to compressor failure, a defective power transistor, or a defective outdoor unit PCB. Checking the power transistor is suggested.
 











