Panasonic · air conditioners Error codes
The second evaporator temperature sensor (N2) is faulty, either short-circuited (closed) or broken. This impairs the accurate reading of the evaporator temperature.
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Inspect the N2 evaporator temperature sensor for damage.
Check the sensor's wiring and connector.
Ensure the sensor is properly installed.
Turn off the unit, unplug it, wait 30 seconds, and plug it back in to reset.