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
Functional Parts Layout SiUS181631EA
44 Refrigerant Circuit
2. Functional Parts Layout
Front View
L1R: Reactor lead wire
(High voltage)
Y2S: Solenoid valve (hot gas bypass)
(Connector: black)
S1NPH: High pressure sensor
(Connector: red)
R3T: Thermistor (suction pipe 1)
(Marking: red)
R5T: Thermistor (suction pipe 2)
(Marking: green)
S1NPL: Low pressure sensor
(Connector: blue)
Y1E: Electronic expansion valve (main)
(Connector: white)
Y3E: Electronic expansion valve
(subcooling)
(Marking: blue)
Y3S: Solenoid valve (unload circuit)
(Connector: pink)
(High voltage)
S1PH: High pressure switch
R7T: Thermistor (liquid pipe)
Y1S: Four way valve
(Connector: blue)
(High voltage)
Y2S: Solenoid valve (hot gas
bypass) lead wire
(Connector: black)
(High voltage)
Y1S: Four way valve lead wire
(Connector: blue)
(High voltage)
S1NPH: High pressure sensor
lead wire
(Connector: red)
(Low voltage)
S1NPL: Low pressure sensor
lead wire
(Connector: blue)
(Low voltage)
Y3S: Solenoid valve (unload
circuit) lead wire
(Connector: pink)
(High voltage)
R5T: Thermistor (suction pipe 2)
(Marking: green)
S1PH: High pressure
switch lead wire
(Connector: white)
(Low voltage)
R2T: Thermistor (discharge pipe)
E1HC: Crankcase heater
lead wire
(Connector: gray)
(High voltage)
(R17939)