SiBE12-817 Code Indication on the Remote ControllerService Diagnosis 1974. Code Indication on the Remote Controller4.1 Error Codes and Description of FaultCode Indication Description of ProblemSystem 00 NormalU0 Insufficient gasU2 Low-voltage detection or over-voltage detectionU4 Signal transmission error (between indoor and outdoor units)U7 Signal transmission error (on outdoor unit PCB)UA Unspecified voltage (between indoor and outdoor units)UH Anti-icing function in other roomsIndoorUnit A1 Indoor unit PCB abnormalityA5 Freeze-up protection function or high pressure controlA6 Fan motor or related abnormalityC4 Heat exchanger temperature thermistor abnormalityC7 Front panel open / close faultC9 Room temperature thermistor abnormalityOutdoorUnit A5 Freeze-up protection controlE1 Outdoor unit PCB abnormalityE5 OL activation (compressor overloaded)E6 Compressor lockE7 DC fan lockE8 Input over current detectionF3 Discharge pipe temperature controlF6 High pressure control in coolingH0 Compressor sensor system abnormalityH6 Position sensor abnormalityH8 CT or related abnormalityH9 Outdoor air thermistor or related abnormalityJ3 Discharge pipe thermistor or related abnormalityJ6 Heat exchanger thermistor or related abnormalityJ8 Liquid pipe thermistor or related abnormalityJ9 Gas pipe thermistor or related abnormalityL3 Electrical box temperature riseL4 Radiation fin temperature riseL5 Output over current detectionP4 Radiation fin thermistor or related abnormality
