Aurora Service Manual

Table Of Contents

SiUS121737EA Indoor Unit

Printed Circuit Board Connector Wiring Diagram 28

1.3 FTXS15/18LVJU

Control PCB

(PCB1)

Caution Replace the PCB if you accidentally cut a wrong jumper.

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 (PCB4)

4) S32 Indoor heat exchanger thermistor

5) S41 Connector for swing motors

6) S46 Connector for display PCB (PCB3)

7) S47 Connector for signal receiver PCB (PCB2)

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

9) JA Address setting jumper

∗ Refer to page 232 for details.

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

∗ Refer to page 234 for details.

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

∗ Refer to page 234 for details.

12)LED A LED for service monitor (green)

13)FU1 (F1U),

FU2 (F2U)

Fuse (3.15 A, 250 V)

14)V1 Varistor

2P227881-6

FU1

H2FGH3

LED A

S32

S1S41

S46

S25

S47

S21

FU2