Indoor Unit SiUS12-928_B
25 Printed Circuit Board Connector Wiring Diagram
1.4 FDXS09/12DVJU
Connectors and
Other Parts
PCB (1): Control PCB
PCB (2): Display PCB
Caution Replace the PCB if you accidentally cut the jumpers other than JA, JB, and JC.
Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them.
1) S1 Connector for fan motor
2) S7 Connector for fan motor (Hall IC)
3) S21 Connector for centralized control (HA)
4) S26 Connector for display PCB
5) S32 Connector for indoor heat exchanger thermistor
6) H1, H2, H3 Connector for terminal board
7) GND Connector for terminal board (ground)
8) JA Address setting jumper
Refer to page 265 for detail.
9) JB Fan speed setting when compressor stops for thermostat OFF
JC Power failure recovery function (auto-restart)
Refer to page 266 for detail.
10) LED A LED for service monitor (green)
11)FU1 (F1U) Fuse (3.15 A, 250 V)
12)V1 (V1TR) Varistor
1) S1 Connector for control PCB
2) SW1 (S1W) Forced operation [ON/OFF] button
3) LED1 (H1P) LED for HOME LEAVE operation (red)
4) LED2 (H2P) LED for timer (yellow)
5) LED3 (H3P) LED for operation (green)
6) RTH1 (R1T) Room temperature thermistor
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