
Section 0
Samsung Electronics 1
Contents
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....................................................................................................................................................2-58
2-2-1 Accessories...............................................................................................................................................................................................2-58
3. Disassembly and Reassembly..................................................................................................3-1
3-1 Indoor Unit...............................................................................................................................................................................................................3-2
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...........................................................................................................................................................................................4-22
4-3-3 What to check before diagnosis .............................................................................................................................................4-29
4-3-4 Number Display Method (Outdoor Unit, MCU, Cable remote control, wall-mount, etc.)........................4-40
4-4 Appropriate Measures for Different Symptom ...............................................................................................................................4-45
4-4-1 Outdoor Unit Operation Flow.....................................................................................................................................................4-45
4-4-2 Main PCB has no power phenomenon................................................................................................................................. 4-46
4-4-3 Indoor Unit ROOM sensor Error (Open/Short)..................................................................................................................4-47
4-4-4 Indoor unit EVAP IN sensor Error (Open/Short).................................................................................................................4-48
4-4-5 Indoor EVAP OUT sensor Error (Open/Short).....................................................................................................................4-49
4-4-6 Indoor Heat Exchanger's EVAP IN sensor dislocation error.......................................................................................4-50
4-4-7 Indoor Heat Exchanger's EVA OUT sensor dislocation error (Open/Short)......................................................4-51
4-4-8
Simultaneous Indoor Heat Exchanger's EVA IN, OUT sensor dislocation error (Open/Short).......4-52
4-4-9 Electronic Expansion Valve opening malfunction (2nd stage) - ....................................................4-53
4-4-10 Breakdown of EEV (2nd)................................................................................................................................................................4-54
4-4-11 Problem with EEV closure (2nd) ...............................................................................................................................................4-55
4-4-12 : Detection of Floating Switch of Indoor Unit's Drain Pump..........................................................4-56
4-4-13 The operational error of Indoor Unit's Fan Motor.........................................................................................................4-57
4-4-14 Mixed operation Error (Only applicable to Heat Pump Model/Not to HR model)...................................4-58
4-4-15 EEPROM error ....................................................................................................................................................................................4-59
4-4-16 Option error of the Remote Controller for an Indoor Unit .....................................................................................4-60
4-4-17 Error due to confused use of Fahrenheit and Celsius ................................................................................................ 4-60
4-4-18 Simultaneous opening of Cooling/heating MCU SOL Valves 1st/2nd .............................................................4-61
4-4-19 Error due to incorrect Indoor Unit Power/Communication Cable Connection.........................................4-62
4-4-20 SPI Feedback Error........................................................................................................................................................................... 4-63
4-4-21 Outdoor Unit Pipe Inspection Error........................................................................................................................................4-64
4-4-22 Communication Error between Indoor and Outdoor Units duringTracking .............................................4-65
4-4-23 Communication Error between Indoor and Outdoor Units after Tracking.................................................. 4-66
4-4-24 Communication error between main and sub Unit of outdoor unit or between outdoor units ...4-67
4-4-25 Communication Error between MCU and Outdoor Unit.........................................................................................4-68
4-4-26 Internal Communication error of the Outdoor Unit C-Box..................................................................................... 4-69
4-4-27 Internal PCB Communication error of the Outdoor Unit C-Box.......................................................................... 4-70
4-4-28 Communication Error between MCU and Outdoor Unit afterTracking is Completed..........................4-71
4-4-29 MCU branch part setup error – inconsecutive connection with the use of 2 branch parts............... 4-72
4-4-30 MCU branch part setup error – Repeated setup for the same address over 3 times .............................4-73
4-4-31 MCU branch part setup error – non-installed address setup................................................................................ 4-74
4-4-32 Setup Error for MCU Branch part – Setup Error for MCU Quantity Used.........................................................4-75
4-4-33 MCU branch part setup error – Overlapping Indoor unit Address setup......................................................4-76
4-4-34 MCU branch part setup error – Set as being used without connection to an Indoor unit ................ 4-77