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
26 Printed Circuit Board Connector Wiring Diagram
3. Indoor Unit
3.1 CTXG09/12/18QVJUW(S)
Control PCB
(A1P)
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.
1) S21 Connector for centralized control (HA)
2) S25 Connector for INTELLIGENT EYE sensor PCB (A3P)
3) S32 Indoor heat exchanger thermistor
4) S41 Connector for swing motors
5) S42 Connector for reduction motor (front panel mechanism) and limit switch
6) S46 Connector for display/signal receiver PCB (A2P)
7) S200 Connector for DC fan motor
8) H1, H2, H3 Connector for terminal strip (indoor - outdoor transmission)
9) FG Connector for terminal strip (frame ground)
10) JB Fan speed setting when compressor stops for thermostat OFF
∗
Refer to page 143 for details.
11) JC Power failure recovery function (auto-restart)
∗
Refer to page 143 for details.
12) LED A LED for service monitor (green)
13) F1U, F2U Fuse (3.15 A, 250 V)
14) V1 Varistor
S42
S41
S32
JB
JC
S200
H3H2FG
S46
S21F2U S25
LED A
V1
F1U
H1
2P357399-6