ESIE09-08A
iv Table of Contents
Board199
3.49 “LH” Indoor Unit: Converter Error ...................................................................200
3.50 “P1” Outdoor Unit: High Voltage of Capacitor in Main Inverter Circuit.........201
3.51 “P1” Indoor Unit: High Voltage of Capacitor in Main Inverter Circuit............202
3.52 “PJ” Indoor Unit: Faulty Combination of PCB ...............................................203
3.53 “U0” Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion
Valve Failure204
3.54 “U2” Power Supply Insufficient or Instantaneous Failure................................206
3.55 “U2” Power Supply Insufficient or Instantaneous Failure................................208
3.56 “U4” Malfunction of Transmission between Indoor Unit and Outdoor Unit ...210
3.57 “U4” Malfunction of Transmission Indoor Unit...............................................212
3.58 “U5” Malfunction of Transmission between Remote Control and Indoor Unit.....
213
3.59 “U7” Indoor Unit: Malfunction of Transmission Outdoor Unit........................214
3.60 “U8” Malfunction of Transmission between Main and Sub Remote Controls.215
3.61 “UA” Communication Error between Outdoor Unit and Indoor Unit...............216
3.62 “UF” System is not Set yet................................................................................217
3.63 “UH” Malfunction of System, Refrigerant System Address Undefined ...........218
Part 8 - Appendix........................................................................223
1. Piping Diagrams..............................................................................................224
1.1 Outdoor Unit.....................................................................................................224
1.2 Indoor Unit........................................................................................................226
1.3 Switch Box Layout ...........................................................................................229
2. Wiring Diagrams.............................................................................................233
2.1 Outdoor Unit.....................................................................................................233
2.2 Field Wiring Connection Diagram ...................................................................237
2.3 Indoor Unit........................................................................................................238
3. Thermistor Resistance / Temperature Characteristics ....................................251
4. Pressure Sensor ...............................................................................................254
5. Method of Replacing the Inverter’s Power Transistors Modules ...................255
6. External Backup Heater Kit............................................................................258
6.1 Model Name .....................................................................................................258
6.2 Main Components.............................................................................................259
6.3 Technical Specifications...................................................................................261
6.4 Detailed Explanation of Setting Modes............................................................262
6.5 External Backup Heater Control.......................................................................263
6.6 Troubleshooting by Indication on the Remote Controller................................265
6.7 Troubleshooting: General Symptoms...............................................................266
6.8 Switch Box Layout ...........................................................................................267
6.9 Wiring Diagrams ..............................................................................................269
7. 3-Way Valve ...................................................................................................273
7.1 Build-Up of 3-Way Valve ................................................................................273
7.2 Troubleshooting Overview 3-Way Valve.........................................................274
7.3 How to Verify If 3-Way Valve is Installed Correctly ......................................275
Part 9- Precautions for New Refrigerant (R-410A) ....................279
1. Precautions for New Refrigerant (R-410A)....................................................280
1.1 Outline ..............................................................................................................280
1.2 Refrigerant Cylinders........................................................................................282
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