Troubleshooting SiBE041134EB60 Service Diagnosis4. Troubleshooting4.1 Error Codes and Description+: Displayed only when system-down occurs.Error Codes Description ReferencePageSystem 00 Normal —U0+ Refrigerant shortage 66U2 Low-voltage detection or over-voltage detection 68U4 Signal transmission error (between indoor unit and outdoor unit) 70UA Unspecified voltage (between indoor unit and outdoor unit) 72IndoorUnit A1 Indoor unit PCB abnormality 61A5 Freeze-up protection control / heating peak-cut control 62A6 Fan motor (DC motor) or related abnormality 63C4 Indoor heat exchanger thermistor or related abnormality 65C9 Room temperature thermistor or related abnormality 65OutdoorUnit E1 Outdoor unit PCB abnormality 73E5+ OL activation (compressor overload) 75E6+ Compressor lock 77E7+ DC fan lock 78E8 Input overcurrent detection 79EA Four way valve abnormality 80F3 Discharge pipe temperature control 82F6 High pressure control in cooling 83H0 Compressor system sensor abnormality 84H6 Position sensor abnormality 85H8 DC voltage / current sensor abnormality 87H9 Outdoor temperature thermistor or related abnormality 88J3+ Discharge pipe thermistor or related abnormality 88J6 Outdoor heat exchanger thermistor or related abnormality 88L3 Electrical box temperature rise 90L4 Radiation fin temperature rise 91L5+ Output overcurrent detection 92P4 Radiation fin thermistor or related abnormality 88
