Indoor Unit SiUS122226E
36 Part 3 Printed Circuit Board Connector Wiring Diagram
Sensor PCB
(PCB1)
Service PCB
(PCB3)
Display/Signal
Receiver PCB
(PCB4)
The symbols in the parenthesis are the names on the appropriate wiring diagram.
1) S49 Connector for control PCB (PCB2)
2) R1T Room temperature thermistor
S49
R1T
3P191450-1
1) S27 Connector for control PCB (PCB2)
2) S2W(4) Switch for upward airflow limit setting
Refer to page 255 for details.
Keep the other switches as factory setting.
3) S4W Switch for airflow selection
Refer to page 54 for details.
S27
S4W
S2W(4)
3P191448-1
1) S47 Connector for control PCB (PCB2)
2) S1W Indoor unit ON/OFF switch
(Forced cooling operation ON/OFF switch)
Refer to page 241 for details of forced cooling operation.
3) LED1 (H1P) LED for operation (green)
4) LED2 (H2P) LED for timer (yellow)
S47S1WLED2
LED1
3P191447-1
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