SiE12-411 Troubleshooting
Service Diagnosis 167
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 169
A5
Freeze-up protection control or high pressure control (heat pump
model only)
170
A6
Fan motor or related
abnormality
AC motor (Wall : 20~35, Duct, Floor / Ceiling)
172
DC motor (Wall : 50~71, Floor) 173
C4
Heat exchanger thermistor or related abnormality 175
C7
Shutter drive motor / shutter limit switch abnormality 176
C9
Room temperature thermistor abnormality 175
U4
Signal transmission error (between indoor and outdoor units) 177
UA
Unspecified voltage (between indoor and outdoor units) 178
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