Indoor Unit SiUS121827E
46 Part 3 Printed Circuit Board Connector Wiring Diagram
Sensor PCB
(PCB1)
Service PCB
(PCB3)
Display/Signal
Receiver PCB
(PCB4)
LED3 does not function.
The symbols in the parenthesis are the names on the appropriate wiring diagram.
1) S49 Connector for control PCB (PCB2)
2) RTH2 (R1T) Room temperature thermistor
S49
RTH2
3P191450-1
1) S27 Connector for control PCB (PCB2)
2) SW2 (S2W)-4 Switch for upward airflow limit setting
∗ Refer to page 261 for details.
∗ Keep the other switches as factory setting.
3) SW4 (S4W) Switch for airflow selection
∗ Refer to page 63 for details.
1) S47 Connector for control PCB (PCB2)
2) SW1 (S1W) Indoor unit ON/OFF switch
3) LED1 (H1P) LED for operation (green)
4) LED2 (H2P) LED for timer (yellow)
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