Troubleshooting for Outdoor Unit SiBE121135_A205 Service Diagnosis7.4 Unspecified Voltage (between Indoor Unit and OutdoorUnit) / Anti-icing Function in Other RoomsError Code UA, UHOutdoor Unit LEDDisplayA j 1 h 2 h 3 h 4 h 5 h∗ LED5 is equipped only on the 5-room model.Method of ErrorDetectionA wrong connection is detected by checking the combination of indoor and outdoor units on themicrocomputer.Error DecisionConditions Anti-icing function 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 206 for detail.(R18424)CautionNOYESNOYESNOYESCheck the model combination.Check the combination of all themodels being connected.The anti-icing function isactivated in other rooms.Refer to A5.Correct the power supplyvoltage.Match the compatible models.Be sure to turn off the power switch before connecting or disconnectingconnectors, or parts may be damaged.Error displayed whileoperating?Power supply voltageas specified?Matched compatibly?
