Specifications
Table Of Contents
- Cover
- Table of Contents
- Part 1 General Information
- Part 2 Specifications
- Part 3 Refrigerant Circuit
- Part 4 Function
- Part 5 Test Operation
- Part 6 Troubleshooting
- Part 7 Appendix
- 1. Piping Diagrams
- 2. Wiring Diagrams for Reference
- 3. List of Electrical and Functional Parts
- 4. Option List
- 5. Piping Installation Point
- 6. Example of connection (R-410A Type)
- 7. Thermistor Resistance / Temperature Characteristics
- 8. Pressure Sensor
- 9. Method of Checking the Inverter’s Power Transistors and Diode Modules
- Part 8 Precautions for New Refrigerant (R-410A)
- Index
- Drawings & Flow Charts
Si34-704
178 Troubleshooting
3.29 “J7” Outdoor Unit: Malfunction of Liquid Pipe Thermistor 1 (R6T)........240
3.30 “J9” Outdoor Unit: Malfunction of Subcooling Heat
Exchanger Gas Pipe Thermistor (R5T) ................................................242
3.31 “JA” Outdoor Unit: Malfunction of High Pressure Sensor......................243
3.32 “JC” Outdoor Unit: Malfunction of Low Pressure Sensor.......................245
3.33 “L1” Outdoor Unit: Defective Inverter PCB.............................................247
3.34 “L4” Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise.................................................................................248
3.35 “L5” Outdoor Unit: Momentary Overcurrent of Inverter Compressor.....250
3.36 “L8” Outdoor Unit: Momentary Overcurrent of Inverter Compressor.....252
3.37 “L9” Outdoor Unit: Inverter Compressor Starting Failure ......................254
3.38 “LC” Outdoor Unit: Malfunction of Transmission between
Inverter and Control PC Board .............................................................257
3.39 “P1” Outdoor Unit: Inverter Over-Ripple Protection ...............................260
3.40 “P4” Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise Sensor ....................................................................261
3.41 “PJ” Outdoor Unit: Faulty Field Setting after Replacing Main PC Board
or Faulty Combination of PC Board......................................................263
3.42 “UO” Outdoor Unit: Gas Shortage Alert .................................................264
3.43 “U1” Reverse Phase, Open Phase.........................................................266
3.44 “U2” Outdoor Unit: Power Supply Insufficient or
Instantaneous Failure...........................................................................267
3.45 “U3” Outdoor Unit: Check Operation not Executed ...............................270
3.46 “U4” Malfunction of Transmission between Indoor Units.......................271
3.47 “U5” Indoor Unit: Malfunction of Transmission between
Remote Controller and Indoor Unit.......................................................274
3.48 “U7” Outdoor Unit: Transmission Failure (Across Outdoor Units) .........275
3.49 “U8” Indoor Unit: Malfunction of Transmission between
Main and Sub Remote Controllers .......................................................281
3.50 “U9” Indoor Unit: Malfunction of Transmission between
Indoor and Outdoor Units in the Same System....................................282
3.51 “UA” Improper Combination of Indoor and Outdoor Units,
Indoor Units and Remote Controller.....................................................283
3.52 “UC” Address Duplication of Centralized Controller ...............................286
3.53 “UE” Malfunction of Transmission between Centralized
Controller and Indoor Unit ....................................................................287
3.54 “UF” System is not Set yet .....................................................................290
3.55 “UH” Malfunction of System, Refrigerant System
Address Undefined...............................................................................291
4. Troubleshooting (OP: Central Remote Controller) ..............................293
4.1 “M1” PC Board Defect ............................................................................293
4.2 “M8” Malfunction of Transmission between Optional
Controllers for Centralized Control .......................................................294
4.3 “MA” Improper Combination of Optional Controllers
for Centralized Control .........................................................................295
4.4 “MC” Address Duplication, Improper Setting ..........................................297
5. Troubleshooting (OP: Unified ON/OFF Controller) .............................298
5.1 Operation Lamp Blinks .........................................................................298
5.2 Display “Under Centralized Control” Blinks (Repeats Single Blink) .....300
5.3 Display “Under Centralized Control” Blinks (Repeats Double Blink) ....303