1. Precautions ..................................................................................................................................................1-1

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 Product Specifacations .....................................................................................................................................................................................2-1

2-1-1 Indoor Unit ..............................................................................................................................................................................................2-1

2-2 Accessory and Option Specifications ....................................................................................................................................................2-27

2-2-1 Accessories ...........................................................................................................................................................................................2-27

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

3-1 Indoor Unit ...............................................................................................................................................................................................................3-2

Slim 1 way cassette type ..........................................................................................................................................................................3-2

BIG DUCT ..........................................................................................................................................................................................................3-8

Global 4way Cassette type ..................................................................................................................................................................3-11

Duct type(Slim1,2) ....................................................................................................................................................................................3-17

Duct type(Slim3) ........................................................................................................................................................................................3-22

Duct type(Mid pressure1......................................................................................................................................................................3-29

Duct type(Mid pressure2) ....................................................................................................................................................................3-34

CEILING............................................................................................................................................................................................................3-39

Wall mounted type (Neo forte) .........................................................................................................................................................3-48

Global Mini 4way ......................................................................................................................................................................................3-51

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

4-1 Check-up Window Description ......................................................................................................................................................................4-1

4-2 Service Operation ...................................................................................................................................................................................................4-2

4-2-1 Special Operation ................................................................................................................................................................................4-2

4-3 Troubleshooting ......................................................................................................................................................................................................4-7

4-3-1 Setting Option Setup Method .....................................................................................................................................................4-7

4-3-2 Option Items ........................................................................................................................................................................................4-13

4-3-3 What to check before diagnosis ..............................................................................................................................................4-16

4-3-4 Number Display Method (Outdoor Unit, MCU, Cable remote control, wall-mount, etc.) ....................4-23

4-4 Appropriate Measures for Different Symptom ..................................................................................................................................4-28

4-4-1 Outdoor Unit Operation Flow ...................................................................................................................................................4-28

4-4-2 Main PCB has no power phenomenon ..............................................................................................................................4-29

4-4-3 Indoor Unit ROOM sensor Error (Open/Short) ................................................................................................................4-30

4-4-4 Indoor unit EVAP IN sensor Error (Open/Short) ..............................................................................................................4-31

4-4-5 Indoor EVAP OUT sensor Error (Open/Short) ..................................................................................................................4-32

4-4-6 Indoor Heat Exchanger's EVAP IN sensor dislocation error .....................................................................................4-33

4-4-7 Indoor Heat Exchanger's EVA OUT sensor dislocation error (Open/Short) ...................................................4-34

4-4-8 Simultaneous Indoor Heat Exchanger's EVA IN, OUT sensor dislocation error (Open/Short) ............4-35

4-4-9 Electronic Expansion Valve opening malfunction (2nd stage) - E135 ..............................................................4-36

4-4-10 Breakdown of EEV (2

4-4-11 Problem with EEV closure (2

4-4-12 E153 : Detection of Floating Switch of Indoor Unit's Drain Pump ...................................................................4-39

4-4-13 The operational error of Indoor Unit's Fan Motor ......................................................................................................4-40

4-4-14 Mixed operation Error (Only applicable to Heat Pump Model/Not to HR model) .................................4-41

Samsung Electronics

) ..............................................................................................................................................................4-37

) ..............................................................................................................................................4-38

Section 0