Specifications

Troubleshooting SiUS12-928_A
101 Service Diagnosis
5. Troubleshooting
5.1 Indoor Unit
Error Codes Description of Fault Reference Page
00
Normal condition —
A1
Indoor unit PCB abnormality 103
A5
Freeze-up protection control or heating peak-cut control 104
A6
Fan motor or related abnormality
AC motor (Slim duct built-in) 106
DC motor (Duct-free) 107
C4
Indoor heat exchanger thermistor or related abnormality 109
C9
Room temperature thermistor or related abnormality 109
U4
Signal transmission error (between indoor and outdoor units) 110
UA
Unspecified voltage (between indoor and outdoor units) 112