Service Manual

Table Of Contents

Indoor Unit SiUS121502E

24 Printed Circuit Board Connector Wiring Diagram

1.4 FVXS09/12/18NVJU

Control PCB

(PCB2)

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 fan motor

2) S21 Connector for centralized control (HA)

3) S26 Connector for service PCB

4) S32 Indoor heat exchanger thermistor

5) S41 Connector for lower air outlet motor

6) S42 Connector for swing motor

7) S46 Connector for display PCB

8) S48 Connector for sensor PCB

9) H1, H2, H3 Connector for terminal board

10)E1 Terminal for ground wire

11)JA Address setting jumper

∗ Refer to page 189 for detail.

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

∗ Refer to page 191 for detail.

13)JC Power failure recovery function

∗ Refer to page 191 for detail.

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

15) LED A LED for service monitor (green)

16) V1, V2 Varistor

FU1 H1 S1 LEDA S21 S41 S42 S26

S46

S48

FU2

S32

2P383711-1