Panasonic · air conditioners Error codes
This error indicates a problem with the ionization unit or the internal control board of the unit. Either component may be faulty.
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Check connections to the ionization unit and internal board.
Inspect both components for visible signs of damage.
A professional diagnosis may be required for board-level issues.
Turn off the unit, unplug it, wait 30 seconds, and plug it back in to reset.