1-1. Precautions for the Service .............................................................................................................................. 1-1

1-2. Precautions for the Static Electricity and PL ................................................................................................1-1

1-3. Precautions for the Safety ............................................................................................................................... 1-1

1-4. Precautions for Handling Refrigerant for Air Conditioner ........................................................................1-2

1-5. Precautions for Welding the Air Conditioner Pipe ......................................................................................1-2

1-6. Precautions for Additional Supplement of Air Conditioner Refrigerant ................................................1-2

1-7. Other Precautions..............................................................................................................................................1-2

2. Product Specifications ................................................................................................ 2-1

2-1. CAC Single ...........................................................................................................................................................2-1

2-2. The Feature of Product .................................................................................................................................... 2-2

2-2-1. Features (Wind-Free 1Way CST) ..................................................................................................... 2-2

2-3. The Feature of Product .................................................................................................................................... 2-3

2-3-1. Features (Wind-Free 4Way CST) .....................................................................................................2-3

2-4. Features & Benefits ......................................................................................................................................... 2-8

2-4-1. 4Way Cassette (600 x 600) .............................................................................................................2-8

2-4-2. 4Way Cassette (600 x 600) - Tasteful design, Compact, Lightweight build ..........................2-8

2-4-3. 360 Cassette ....................................................................................................................................2-10

2-4-4. Duct S ................................................................................................................................................ 2-12

2-4-5. Wall Mount Type ............................................................................................................................. 2-13

2-4-6. Wall Mounted Wind Free - Wind Free, Auto Clean ................................................................... 2-14

2-5. Product Specifications .................................................................................................................................. 2-15

2-6. Specifications of optional items ..................................................................................................................2-30

2-6-1. Accessories ...................................................................................................................................... 2-30

3. Disassembly and Reassembly.................................................................................... 3-1

3-1. Indoor unit ......................................................................................................................................................... 3-2

3-2. Outdoor unit ....................................................................................................................................................3-89

4. Troubleshooting ......................................................................................................... 4-1

4-1. Setting an indoor unit address and installation option ............................................................................ 4-1

4-1-1. The procedure of setting option...................................................................................................... 4-1

4-1-2. The procedure of setting option .....................................................................................................4-2

4-1-3. Order for Setting Options (Wired Remote Controller) .............................................................4-10

4-1-4. Setting the indoor unit addresses ................................................................................................ 4-11

4-1-5. Setting an indoor unit installation option

(Suitable for the condition of each installation location) ....................................................... 4-12

4-1-6. Changing the addresses and options individually ................................................................... 4-29

4-1-7. Emergency Temperature Output (ETO) function ..................................................................... 4-30

4-2. Model-specific option code ..........................................................................................................................4-32

4-3. Diagnostic Checklist ..................................................................................................................................... 4-38

4-3-1. Test operation mode and check mode ....................................................................................... 4-38

4-3-2. Error code [indoor] .........................................................................................................................4-41

4-4. Troubleshooting by symptoms .................................................................................................................. 4-50

4-4-1. Indoor temperature sensor error (E121) ..................................................................................... 4-50

4-4-2. Indoor heat exchanger temperature sensor error (E122) ........................................................4-51

4-4-3. Indoor unit float sensor error (E153) ...........................................................................................4-52

4-4-4. Indoor Fan error (E154) ................................................................................................................. 4-53

4-4-5. EEPROM circuit failure (E162)...................................................................................................... 4-54

4-4-6. Communication error after finishing Tracking (E202) ............................................................ 4-55

4-4-7. The whistling noise from the indoor unit in low wind mode ................................................. 4-56