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
SiUS181631EA
Troubleshooting 173
7.2 Actuation of High Pressure Switch ........................................................... 227
7.3 Actuation of Low Pressure Sensor ........................................................... 229
7.4 Compressor Motor Lock ........................................................................... 231
7.5 Outdoor Fan Motor Abnormality ............................................................... 232
7.6 Moving Part of Electronic Expansion Valve (Y1E, Y3E) Abnormality....... 233
7.7 Discharge Pipe Temperature Abnormality ............................................... 235
7.8 Refrigerant Overcharged.......................................................................... 236
7.9 Outdoor Temperature Thermistor (R1T) Abnormality .............................. 237
7.10 Discharge Pipe Thermistor (R2T) Abnormality......................................... 238
7.11 Suction Pipe Thermistor (R3T, R5T) Abnormality .................................... 239
7.12 Outdoor Heat Exchanger Thermistor (R4T) Abnormality ......................... 240
7.13 Outdoor Liquid Pipe Thermistor (R7T) Abnormality ................................. 241
7.14 Subcooling Heat Exchanger Gas Pipe Thermistor (R6T) Abnormality..... 242
7.15 High Pressure Sensor Abnormality .......................................................... 243
7.16 Low Pressure Sensor Abnormality ........................................................... 244
7.17 Outdoor Unit PCB Abnormality................................................................. 245
7.18 Radiation Fin Temperature Rise .............................................................. 246
7.19 Inverter Compressor Abnormality............................................................. 247
7.20 Inverter Current Abnormality .................................................................... 248
7.21 Compressor Start-up Error ....................................................................... 249
7.22 High Voltage of Capacitor in Main Inverter Circuit ................................... 250
7.23 Radiation Fin Thermistor Abnormality ...................................................... 251
7.24 Low Pressure Drop due to Refrigerant Shortage or
Electronic Expansion Valve Abnormality.................................................. 252
7.25 Power Supply Insufficient or Instantaneous Failure ................................. 254
7.26 Check Operation is not Conducted .......................................................... 255
7.27 Signal Transmission Error between Indoor Unit and
Outdoor Unit in the Same System............................................................ 256
7.28 Excessive Number of Indoor Units ........................................................... 257
7.29 Address Duplication of Central Remote Controller................................... 258
7.30 Transmission Error between Centralized Remote Controller and
Indoor Unit................................................................................................ 259
7.31 System is not Set yet................................................................................ 261
7.32 System Abnormality, Refrigerant System Address Undefined ................. 262
7.33 Check for Outdoor Unit............................................................................. 263
8. Thermistor Resistance/Temperature Characteristics..............................267
9. Pressure Sensor .....................................................................................269
10.Method of Replacing Inverter’s Power Transistors Modules...................270