Service manual

Indoor Unit SiUS041111
14 Printed Circuit Board Connector Wiring Diagram
1.2 15/18/24 Class
Connectors and
Other Parts
PCB (1): Control PCB
PCB (2): Signal Receiver PCB
PCB (3): Buzzer PCB
PCB (4): Display PCB
1) S1 Connector for DC fan motor
2) S6 Connector for swing motor (horizontal blades)
3) S21 Connector for centralized control (HA)
4) S26 Connector for buzzer PCB
5) S28 Connector for signal receiver PCB
6) S32 Indoor heat exchanger thermistor
7) H1, H2, H3, FG Connector for terminal board
8) JA Address setting jumper
 Refer to page 225 for detail.
JB Fan speed setting when compressor stops for thermostat OFF
JC Power failure recovery function (auto-restart)
 Refer to page 227 for detail.
9) LED A LED for service monitor (green)
10)FU1 Fuse (3.15 A, 250 V)
11)V1 Varistor
1) S29 Connector for control PCB
2) SW1 (S1W) Forced cooling operation ON/OFF button
1) S27 Connector for control PCB
2) S38 Connector for display PCB
3) RTH1 (R1T) Room temperature thermistor
1) S37 Connector for buzzer PCB
2) LED1 (H1P) LED for operation (green)
3) LED2 (H2P) LED for timer (yellow)