Specifications

SiUS39-601
iv Table of Contents
2.46 “U5” Indoor Unit: Malfunction of Transmission Between
Remote Controller and Indoor Unit........................................................... 180
2.47 “U7” Indoor Unit: Malfunction of Transmission
Between Outdoor Units ............................................................................ 181
2.48 “U8” Indoor Unit: Malfunction of Transmission Between Main
and Sub Remote Controllers .................................................................... 183
2.49 “U9” Indoor Unit: Malfunction of Transmission Between Indoor Units
and Outdoor Units in the Same System ................................................... 184
2.50 “UA” Improper Combination of Indoor Units
and Outdoor Units/Indoor Units and Remote Controller........................... 186
2.51 “UC” Address Duplication of Central Remote Controller............................ 188
2.52 “UE” Malfunction of Transmission Between Centralized Controller
and Indoor Unit......................................................................................... 189
2.53 “UF” System is not Set yet......................................................................... 191
2.54 “UH” Malfunction of System, Refrigerant System Address Undefined....... 192
3. Troubleshooting (OP: Central Remote Controller) ..................................194
3.1 “M1” PC Board Defect ................................................................................ 194
3.2 “M8” Malfunction of Transmission Between Optional Controllers
for Centralized Control ............................................................................. 195
3.3 “MA” Improper Combination of Optional Controllers
for Centralized Control ............................................................................. 197
3.4 “MC” Address Duplication, Improper Setting .............................................. 199
4. Troubleshooting (OP: Schedule Timer)...................................................200
4.1 “UE” Malfunction of Transmission Between Central Remote Controller
and Indoor Unit......................................................................................... 200
4.2 “M1” PC Board Defect ................................................................................ 202
4.3 “M8” Malfunction of Transmission Between Optional Controllers
for Centralized Control ............................................................................. 203
4.4 “MA” Improper Combination of Optional Controllers
for Centralized Control ............................................................................. 205
4.5 “MC” Address Duplication, Improper Setting .............................................. 207
5. Troubleshooting (OP: Unified ON/OFF Controller) .................................208
5.1 Operation Lamp Blinks ............................................................................. 208
5.2 Display “Under Centralized Control” Blinks (Repeats Single Blink) ......... 210
5.3 Display “Under Centralized Control” Blinks (Repeats Double Blink) ........ 213
Part 7 Replacement Procedure for INV Compressor, VRV .........217
1. Replacement Procedure for INV Compressor,
VRV (RXYQ72M, 96M) ...........................................................................218
1.1 Replacement Procedure........................................................................... 218
Part 8 Appendix............................................................................ 219
1. Piping Diagrams......................................................................................220
1.1 Outdoor Unit ............................................................................................. 220
1.2 Indoor Unit................................................................................................ 221