Service Manual
Table Of Contents
- Cover
- Table of contents
- Part 1 List of Functions
- Part 2 Specifications
- Part 3 Printed Circuit Board Connector Wiring Diagram
- Part 4 Refrigerant Circuit
- Part 5 Functions and Control
- Part 6 Test Operation and Field Settings
- Part 7 Remote Controller
- Part 8 Troubleshooting
- 1. Troubleshooting with LED
- 2. Service Diagnosis
- 3. Error Codes and Description
- 4. Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series
- 5. Troubleshooting for FFQ Series
- 6. Troubleshooting for Branch Provider (BP) Unit
- 7. Troubleshooting for Outdoor Unit
- 8. Thermistor Resistance/Temperature Characteristics
- 9. Pressure Sensor
- 10. Method of Replacing Inverter’s Power Transistors Modules
- Part 9 Appendix
Indoor Unit SiUS181631EA
36 Printed Circuit Board Connector Wiring Diagram
3.6 FVXS09/12/15/18NVJU
Control PCB
(PCB2)
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) 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 141 for details.
12)JB Fan speed setting when compressor stops for thermostat OFF
∗
Refer to page 143 for details.
13)JC Power failure recovery function
∗
Refer to page 143 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 LEDA S21 S41 S42 S26
S46
S48
JC
JA
JB
FU2
S32
V2
2P383711-1