Service Manual

Table Of Contents

Indoor Unit SiUS121502E

22 Printed Circuit Board Connector Wiring Diagram

1.3 FDXS09/12LVJU, CDXS15/18/24LVJU

Control PCB

(A1P)

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 AC fan motor

2) S7 Connector for AC 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) FG (GND) Connector for terminal board (ground)

8) JA Address setting jumper

∗ Refer to page 189 for detail.

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

∗ Refer to page 191 for detail.

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

∗ Refer to page 191 for detail.

11) LED A LED for service monitor (green)

12) FU1 (F1U) Fuse (3.15 A, 250 V)

13) V1 (V1TR) Varistor

S21

2P292535-1

LED A JCJA

FU1

S26

S32