Service manual

SiENBE12-522A Troubleshooting
Service Diagnosis 205
5. Troubleshooting
5.1 Indoor Units
- : Not used for troubleshooting
∗ : Varies depending on the cases.
Indication on the
remote controller
Description of the Fault Details of fault
(Refer to the
indicated page.)
00
Indoor unit in normal condition (Conduct a diagnosis of the outdoor unit.) —
A1
Indoor unit PCB abnormality 207
A5
Freeze-up protection control or high pressure control (heat pump model only) 208
A6
Fan motor or related
abnormality
AC motor (Wall : 20~35 C series, Duct, Floor / Ceiling) 210
DC motor (Wall : 20~35 D series and 50~71 B series, Floor) 211
C4
Heat exchanger thermistor or related abnormality 213
C7
Shutter drive motor / shutter limit switch abnormality 214
C9
Room temperature thermistor abnormality 213
U4
Signal transmission error (between indoor and outdoor units) 215
UA
Unspecified voltage (between indoor and outdoor units) 216