Troubleshooting SiEN12-710A142 Service Diagnosis4.23 Anti-icing Function in Other Rooms / UnspecifiedVoltage (between Indoor and Outdoor Units)Remote ControlDisplayUA, UHMethod ofMalfunctionDetectionA wrong connection is detected by checking the combination of indoor and outdoor units on themicrocomputer.MalfunctionDecisionConditions" Operation halt due to the anti-icing function in other rooms" Operation halt due to unspecified voltage between indoor and outdoor unitsSupposedCauses" Operation halt due to the anti-icing function in other rooms" Wrong connections at the indoor unit" PCB wrongly connectedTroubleshooting(R7151)CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.NOYESNOYESNOYESError-displaying air-conditionerrunning?Supply voltage as specified?Normal?Check the model number.Check the combination of all themodels being connected.The anti-icing function isactivated in other rooms.Refer to A5.Correct.Reconnect.
