SiBE041102_A TroubleshootingService Diagnosis 534. Troubleshooting4.1 Error Codes and Description+: Displayed only when system-down occurs.Error Codes Description ReferencePageSystem 00 Normal —U0+ Refrigerant shortage 83U2 Low-voltage detection or over-voltage detection 85U4 Signal transmission error (between indoor unit and outdoor unit) 60UA Unspecified voltage (between indoor unit and outdoor unit) 62IndoorUnit A1 Indoor unit PCB abnormality 54A5 Freeze-up protection control or heating peak-cut control 55A6 Fan motor (AC motor) or related abnormality 57C4 Indoor heat exchanger thermistor or related abnormality 59C9 Room temperature thermistor or related abnormality 59OutdoorUnit E1 Outdoor unit PCB abnormality 63E5+ OL activation (compressor overload) 64E6+ Compressor lock 65E8 Input overcurrent detection 66EA Four way valve abnormality 67F3 Discharge pipe temperature control 69F6 High pressure control in cooling 70H0 Compressor system sensor abnormality 71H6 Position sensor abnormality 72H8 DC voltage / current sensor abnormality 74H9 Outdoor temperature thermistor or related abnormality 75J3+ Discharge pipe thermistor or related abnormality 75J6 Outdoor heat exchanger thermistor or related abnormality 75L3 Electrical box temperature rise 77L4 Radiation fin temperature rise 79L5+ Output overcurrent detection 81P4 Radiation fin thermistor or related abnormality 75
