Service Check Function SiAU18-715314 Troubleshooting2.5 Sky Air Indoor Unit Error Codes and LED IndicationSymbols 5 : Blinks 4 : On 3 : Off — : No connection with troubleshooting : High probability of malfunction{ : Possibility of malfunction
: Low probability of malfunction— : No possibility of malfunction (do not replace)SystemIndoor UnitRemoteControllerDisplayLocation of Malfunction Contents of Malfunction Details ofMalfunction(ReferencePage)Otherthan PCBoardPC BoardOutdoorUnit IndoorUnitRemoteControllerU5 — { { Transmission error (betweenindoor unit and remotecontroller)345U8 — { { Transmission error between“main” remote controller and“sub” remote controller346UA — { — Excessive indoor unitsconnected to this system. 347IndoorUnitLEDDisplay(H1P)RemoteControllerDisplayLocation of Malfunction Contents of Malfunction Details ofMalfunction(ReferencePage)Otherthan PCBoardPC BoardOutdoorUnit IndoorUnitRemoteController5 — — — — Normal → to outdoor unit —5 A1 — — { — Failure of indoor unit PCboard (For self-diagnosis byLED, refer to p.302.)331435 A3 — — — Malfunction of drain waterlevel system 3325 AF — — — Float switch operationduring compressor stop 3345 A6(FHQ only) —
— Indoor unit fan motoroverload / overcurrent / lock 335, 3365 A7 —
— Swing flap motorMalfunction / Lock 3385 AJ — { — Failure of capacity setting 3405 C4 —
— Malfunction of heatexchanger temperaturesensor system (R2T)3415 C5 —
— Malfunction of heatexchanger temperaturesensor system (R3T)3425 C9 —
— Malfunction of suction airtemperature sensor system 3435 CJ — —
— Malfunction of remotecontrol air temperaturesensor system344
