1-1. Indoor Unit ........................................................................................................................................................... 4

1-2. Outdoor Unit ...................................................................................................................................................... 10

1-3. Combination Specifications of Indoor Units with Outdoor Units ................................................................ 14

1-4. Operation Characteristic Curve ...................................................................................................................... 17

2. AIR DUCTING WORK ........................................................................................................................ 24

2-1. Static Pressure Characteristics of Each Model ............................................................................................. 24

3. CONSTRUCTION VIEWS (EXTERNAL VIEWS) ............................................................................... 27

3-1. Indoor Unit ........................................................................................................................................................ 27

3-2. Outdoor Unit ...................................................................................................................................................... 32

4. SYSTEMATIC REFRIGERATING CYCLE DIAGRAM ....................................................................... 35

4-1. Indoor Unit/Outdoor Unit ................................................................................................................................. 35

5. WIRING DIAGRAM ............................................................................................................................. 43

5-1. Indoor Unit ........................................................................................................................................................ 43

5-2. Outdoor Unit ...................................................................................................................................................... 47

6. SPECIFICATIONS OF ELECTRICAL PARTS ................................................................................... 50

6-1. Indoor Unit ........................................................................................................................................................ 50

6-2. Outdoor Unit ...................................................................................................................................................... 52

6-3. Accessory Separate Soldparts ....................................................................................................................... 54

7. REFRIGERANT R410A ..................................................................................................................... 55

7-1. Safety During Installation/Servicing ............................................................................................................... 55

7-2. Refrigerant Piping Installation ...................................................................................................................... 55

7-3. Tools .................................................................................................................................................................. 59

7-4. Recharging of Refrigerant ............................................................................................................................... 60

7-5. Brazing of Pipes ............................................................................................................................................... 61

8. CONTROL BLOCK DIAGRAM .......................................................................................................... 63

8-1. Indoor Control Circuit ...................................................................................................................................... 63

8-2. Control Specifications ..................................................................................................................................... 65

8-3. Indoor Print Circuit Board ................................................................................................................................ 65

9. CIRCUIT CONFIGURATION AND CONTROL SPECIFICATIONS ................................................... 87

9-1. Microcomputer System Block Diagram .......................................................................................................... 87

9-2. Indoor Control Circuit ...................................................................................................................................... 95

9-3. Outdoor Controls .............................................................................................................................................. 98

10. TROUBLESHOOTING ..................................................................................................................... 117

10-1. Summary of Troubleshooting ........................................................................................................................ 117

10-2. Check Code List ............................................................................................................................................. 119

10-3. Error Mode Detected by LED on Outdoor P.C. Board .................................................................................. 122

10-4. Troubleshooting Procedure for Each Check Code ...................................................................................... 125

11. REPLACEMENT OF SERVICE INDOOR P.C. BOARD .................................................................. 146

12. SETUP AT LOCAL SITE AND OTHERS ......................................................................................... 150

12-1. Indoor Unit ...................................................................................................................................................... 150

12-2. Network Adapter ............................................................................................................................................. 159

12-3. How to Set an Address Number .................................................................................................................... 161

12-4. Display and Operation of Main Remote Controller and Central Control Remote Controller .................. 163

13. ADDRESS SETUP ........................................................................................................................... 164

13-1. Address Setup ................................................................................................................................................ 164

13-2. Address Setup & Group Control ................................................................................................................... 165

13-3. Address Setup ................................................................................................................................................ 166

14. DETACHMENTS ............................................................................................................................... 169

14-1. Indoor Unit ..................................................................................................................................................... 169

14-2. Outdoor Unit .................................................................................................................................................... 187

15. EXPLODED VIEWS AND PARTS LIST ........................................................................................... 211

15-1. Indoor Unit ...................................................................................................................................................... 211

15-2. Outdoor Unit .................................................................................................................................................... 227

15-3. Replacement of Main Parts (Sold Separately) ............................................................................................. 237

16. CORD HEATER INSTALLATION WORK ......................................................................................... 239

APPENDIX-1

1. SDI combination, Indoor / Outdoor ......................................................................................................................... 1

2. Service parts for 4-way Cassette Type .................................................................................................................... 1

3. Specification for Concealed Duct Type ................................................................................................................... 2

4. Service parts for Concealed Duct Type .................................................................................................................. 2

5. Service parts for Under Ceiling Type ...................................................................................................................... 3

6. Service PCB Replacement ....................................................................................................................................... 4

7. Indoor unit & Remote controller .............................................................................................................................. 5

8. Connecting cable for Remote controllers .............................................................................................................. 5

CONTENTS

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