How to troubleshoot E3 error on AUX ASW-H09B5B4/FAR3DI-C3?
- EebutlerAug 27, 2025
If your AUX Air Conditioner displays error code E3, it indicates an indoor unit coil sensor error. This is detected as a short circuit or open circuit during the inspection of the indoor unit's main PCB. Check whether there’s resistance problem, short circuit or open circuit in the sensor; the resistance value shall with a reasonable range (about 20K? for frequency conversion machine).





