SiUS121827E Indoor Unit
Part 3 Printed Circuit Board Connector Wiring Diagram 45
1.5 FVXS09/12/15/18NVJU
Control PCB
(PCB2)
Replace the PCB if you cut a jumper unintentionally.
Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them.
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) S26 Connector for service PCB (PCB3)
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/signal receiver PCB (PCB4)
8) S48 Connector for sensor PCB (PCB1)
9) H1, H2, H3 Connector for terminal strip
10) E1 Terminal for ground wire
11) JA Address setting jumper
∗ Refer to page 258 for details.
12) JB Fan speed setting when compressor stops for thermostat OFF
∗ Refer to page 261 for details.
13) JC Power failure recovery function
∗ Refer to page 261 for details.
14) FU1 (F1U),
FU2 (F2U)
Fuse (3.15 A, 250 V)
15) LED A LED for service monitor (green)
16) V1, V2 Varistor
E1
V1
H2
H3
FU1 H1 S1 LED A S21 S41 S42 S26
S46
S48
JC
JA
JB
FU2
S32
V2
2P383711-1
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