Troubleshooting by Indication on the Remote Controller SiBE31-801_C321 Troubleshooting4.57 “UH” Malfunction of System, Refrigerant SystemAddress UndefinedRemoteControllerDisplayUHApplicableModelsAll models of indoor unitsRTSQ8P~16P (Outdoor Unit)Method ofMalfunctionDetectionDetect an indoor unit with no address setting.MalfunctionDecisionConditionsThe malfunction decision is made as soon as the abnormality aforementioned is detected.SupposedCauses Improper connection of transmission wiring between indoor-outdoor units and outdoor-outdoor units Defect of indoor unit PCB Defect of outdoor unit main PCB (A1P or A3P)
