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7. REFRIGERANT R410A ............................................................................ 46
7-1. Safety During Installation / Servicing ............................................................. 46
7-2. Refrigerant Piping Installation....................................................................... 46
7-3. Tools .................................................................................................................. 50
7-4. Recharging of Refrigerant................................................................................ 50
7-5. Brazing of Pipes................................................................................................ 51
7-6. Instructions for Re-use Piping of R22 or R407C ............................................ 53
8. INDOOR CONTROL CIRCUIT .................................................................. 58
8-1. Indoor Controller Block Diagram..................................................................... 58
8-2. Control Specifications...................................................................................... 61
8-3. Optional Connector Specifications of Indoor P.C. Board .............................. 74
8-4. Indoor Print Circuit Board................................................................................ 75
9. CIRCUIT CONFIGURATION AND CONTROL SPECIFICATIONS ........... 76
9-1. Outdoor Controls .............................................................................................. 76
9-2. Outline of Main Controls .................................................................................. 78
10. TROUBLESHOOTING .............................................................................. 87
10-1. Summary of Troubleshooting........................................................................... 87
10-2. Troubleshooting ................................................................................................ 89
11. REPLACEMENT OF SERVICE P.C. BOARD.......................................... 141
11-1. Indoort Unit ..................................................................................................... 141
11-2. Outdoor Unit.................................................................................................... 146
12. SETUP AT LOCAL SITE AND OTHERS ................................................ 147
12-1. Indoor Unit....................................................................................................... 147
12-2. Setup at Local Site / Others ........................................................................... 158
12-3. How to Set up Central Control Address Number ......................................... 160
12-4. Outdoor Unit.................................................................................................... 166
13. ADDRESS SETUP.................................................................................. 173
13-1. Address Setup Procedure.............................................................................. 173
13-2. Address Setup & Group Control.................................................................... 174
13-3. Remote Controller Wiring............................................................................... 177
13-4. Address Setup (Manual setting from remote controller)............................. 178
13-5. Confirmation of Indoor Unit No. Position ..................................................... 179
14. DETACHMENTS ..................................................................................... 181
14-1. Indoor Unit...................................................................................................... 181
14-2. Outdoor Unit.................................................................................................... 196
15. EXPLODED VIEWS AND PARTS LIST .................................................. 211
15-1. Indoor Unit....................................................................................................... 211
15-2. Outdoor Unit.................................................................................................... 219