Service Manual

SiUS181631EA
Table of Contents vi
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
Part 9 Appendix............................................................................ 272
1. Piping Diagrams......................................................................................273
1.1 Outdoor Unit ............................................................................................. 273
1.2 Branch Provider (BP) Unit ........................................................................ 274
1.3 Indoor Unit................................................................................................ 275
2. Wiring Diagrams......................................................................................278
2.1 Outdoor Unit ............................................................................................. 278
2.2 Branch Provider (BP) Unit ........................................................................ 279
2.3 Indoor Unit................................................................................................ 280
3. Operation Limit........................................................................................287