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6. REFRIGERANT R410A ............................................................................ 35
6-1. Safety During Installation/Servicing ............................................................... 35
6-2. Refrigerant Piping Installation....................................................................... 35
6-3. Tools .................................................................................................................. 39
6-4. Recharging of Refrigerant................................................................................ 39
6-5. Brazing of Pipes................................................................................................ 40
6-6. Instructions for Re-use Piping of R22 or R407C ............................................ 42
6-7. Tolerance of Pipe Length and Pipe Head........................................................ 46
6-8. Additional Refrigerant Amount........................................................................ 48
6-9. Piping Materials and Sizes............................................................................... 50
6-10. Branch Pipe ....................................................................................................... 51
6-11. Distributor ......................................................................................................... 51
7. INDOOR CONTROL CIRCUIT ................................................................. 52
7-1. Indoor Controller Block Diagram..................................................................... 52
7-2. Control Specifications...................................................................................... 53
7-3. Optional Connector Specifications of Indoor P.C. Board .............................. 59
7-4. Indoor Print Circuit Board ................................................................................ 60
7-5. Outdoor Print Circuit Board ............................................................................. 61
8. CIRCUIT CONFIGURATION AND CONTROL SPECIFICATIONS........... 64
8-1. Outdoor Controls .............................................................................................. 64
9. INDOOR UNIT TROUBLESHOOTING...................................................... 69
9-1. Summary of Troubleshooting........................................................................... 69
9-2. Troubleshooting ................................................................................................ 70
10. OUTDOOR UNIT TROUBLESHOOTING.................................................. 83
10-1. Summary of Troubleshooting........................................................................... 83
10-2. Troubleshooting ................................................................................................ 85
11. REPLACEMENT OF SERVICE P.C. BOARD ......................................... 112
11-1. Indoort Unit ..................................................................................................... 112
12. SETUP AT LOCAL SITE AND OTHERS ................................................ 116
12-1. Indoor Unit....................................................................................................... 116
12-2. Setup at Local Site / Others ........................................................................... 123
12-3. How to Set up Central Control Address Number ......................................... 125
13. ADDRESS SETUP.................................................................................. 127
13-1. Address Setup Procedure.............................................................................. 127
13-2. Address Setup & Group Control.................................................................... 128
13-3. Address Setup (Manual Setting from Remote Controller)........................... 131
14. DETACHMENTS ..................................................................................... 133
14-1. Indoor Unit....................................................................................................... 133
14-2. Outdoor Unit.................................................................................................... 141
15. EXPLODED VIEWS AND PARTS LIST .................................................. 150
15-1. Indoor Unit....................................................................................................... 150
15-2. Outdoor Unit.................................................................................................... 153