Service Manual

Table Of Contents

Indoor Unit SiUS121502E

18 Printed Circuit Board Connector Wiring Diagram

1. Indoor Unit

1.1 CTXS07LVJU, FTXS09/12LVJU

Control PCB

(PCB1)

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.

Note: The symbols in the parenthesis are the names on the appropriate wiring diagram.

1) S1 Connector for DC fan motor

2) S21 Connector for centralized control (HA)

3) S25 Connector for INTELLIGENT EYE sensor PCB

4) S32 Indoor heat exchanger thermistor

5) S41 Connector for swing motors

6) S46 Connector for display PCB

7) S47 Connector for signal receiver PCB

8) H1, H2, H3, FG Connector for terminal board

9) JA Address setting jumper

∗ Refer to page 189 for detail.

10)JB Fan speed setting when compressor stops for thermostat OFF

∗ Refer to page 191 for detail.

11)JC Power failure recovery function (auto-restart)

∗ Refer to page 191 for detail.

12)LED A LED for service monitor (green)

13)FU1 (F1U), FU2 Fuse (3.15 A, 250 V)

14)V1 Varistor

FU1

S1S41

S21

S47

S46

S25

LED A

FU2

S32

H1H2H3

2P206687-4