SiENBE37-701
iv Table of Contents
3.38 “L5” Outdoor Unit: Momentary Overcurrent of Inverter Compressor.....308
3.39 “L8” Outdoor Unit: Momentary Overcurrent of Inverter Compressor.....310
3.40 “L9” Outdoor Unit: Inverter Compressor Starting Failure ......................312
3.41 “LC” Outdoor Unit: Malfunction of Transmission between Inverter and Con-
trol PC Board315
3.42 “P1” Outdoor Unit: Inverter Over-Ripple Protection ...............................318
3.43 “P4” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise
Sensor320
3.44 “PJ” Outdoor Unit: Faulty Field Setting after Replacing Main PC Board or
Faulty Combination of PC Board322
3.45 “U0” Outdoor Unit: Gas Shortage Alert .................................................324
3.46 “U1” Reverse Phase, Open Phase.........................................................326
3.47 “U2” Outdoor Unit: Power Supply Insufficient or Instantaneous Failure 327
3.48 “U3” Outdoor Unit: Check Operation not Executed ...............................330
3.49 “U4” Malfunction of Transmission between Indoor Units.......................331
3.50 “U5” Indoor Unit: Malfunction of Transmission between Remote Control
and Indoor Unit334
3.51 “U7” Outdoor Unit: Transmission Failure (Across Outdoor Units) .........335
3.52 “U8” Indoor Unit: Malfunction of Transmission between Main and Sub Re-
mote Controls341
3.53 “U9” Indoor Unit: Malfunction of Transmission between Indoor and Outdoor
Units in the Same System342
3.54 “UA” Improper Combination of Indoor and Outdoor Units, Indoor Units and
Remote Control343
3.55 “UC” Address Duplication of Centralized Controller...............................349
3.56 “UE” Malfunction of Transmission between Centralized Controller and In-
door Unit350
3.57 “UF” System is not Set yet.....................................................................353
3.58 “UH” Malfunction of System, Refrigerant System Address Undefined...354
4. Troubleshooting (OP: Central Remote Control) ..................................356
4.1 “M1” PC Board Defect ............................................................................356
4.2 “M8” Malfunction of Transmission between Optional Controllers for Cen-
tralized Control357
4.3 “MA” Improper Combination of Optional Controllers for Centralized Control
358
4.4 “MC” Address Duplication, Improper Setting ..........................................360
5. Troubleshooting (OP: Unified ON/OFF Controller) .............................361
5.1 Operation Lamp Blinks .........................................................................361
5.2 Display “Under Centralized Control” Blinks (Repeats Single Blink) .....363
5.3 Display “Under Centralized Control” Blinks (Repeats Double Blink) ....366
Part 7 Appendix......................................................................... 383
1. Piping Diagrams..................................................................................384
1.1 Outdoor Unit .........................................................................................384
1.2 Indoor Unit............................................................................................389
1.3 BS Unit .................................................................................................394
2. Wiring Diagrams for Reference...........................................................395
2.1 Outdoor Unit .........................................................................................395
2.2 Field Wiring ..........................................................................................400
2.3 Indoor Unit............................................................................................403
2.4 BS Unit .................................................................................................417
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