SiUS121502E Troubleshooting for Outdoor UnitService Diagnosis 1417.4 Unspecified Voltage (Between Indoor Unit and OutdoorUnit) / Anti-icing Control in Other RoomsError Code UA, UHOutdoor Unit LEDDisplayA j 1 h 2 h 3 h 4 h 5 hMethod of ErrorDetectionA wrong connection is detected by checking the combination of indoor and outdoor units on themicrocomputer.Error DecisionConditions Anti-icing control in other rooms Unspecified internal and/or external voltages Mismatching of indoor and outdoor unitsSupposedCauses Anti-icing function in other rooms Power supply voltage is not as specified. Wrong models interconnected Wrong indoor unit PCB or outdoor unit PCB mountedTroubleshootingNote: Refer to Anti-icing control for indoor unit on page 142 for detail.(R21922)CautionNOYESNOYESNOYESCheck the model combination.Error displayed whileoperating?Powersupply voltage asspecified?Matched compatibly?The anti-icing function isactivated in other rooms.Refer to A5.Correct the power supplyvoltage.Match the compatible models.Check the combination of allconnected models.Be sure to turn off the power switch before connecting or disconnectingconnectors, or parts may be damaged.
