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Indoor Unit
SiUS121827E
46
Part 3 Printed Circuit Board Connector Wiring Diagram
Note
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
∗
S27
SW4
SW2-4
3P191448-1
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)
S47
SW1
LED2
LED1
3P191447-1