Contents
1. Precautions .................................................................................................................................. 5
1-1 Precautions for the Service ........................................................................................................................ 5
1-2 Precautions for the Static Electricity and PL ............................................................................................ 5
1-3 Precautions for the Safety ......................................................................................................................... 5
1-4 Precautions for Handling Refrigerant for Air Conditioner ..................................................................... 6
1-5 Precautions for Welding the Air Conditioner Pipe .................................................................................. 6
1-6 Precautions for Additional Supplement of Air Conditioner Refrigerant ............................................. 6
1-7 Other Precautions ....................................................................................................................................... 6
2. Product Specifications ............................................................................................................... 7
2-1 Product Specifacations .............................................................................................................................. 7
2-1-1 Indoor Unit .................................................................................................................................................................................7
2-2 Accessory and Option Specifications ..................................................................................................... 13
2-2-1 Accessories ............................................................................................................................................................................. 13
3. Disassembly and Reassembly ................................................................................................. 16
3-1 Indoor Unit ................................................................................................................................................ 17
4. Troubleshooting ........................................................................................................................ 24
4-1 Check-up Window Description ................................................................................................................ 24
4-2 Service Operation .................................................................................................................................... 25
4-2-1 Special Operation ................................................................................................................................................................25
4-2-2 DVM S Models EEPROM Code Table............................................................................................................................29
4-3 Troubleshooting ....................................................................................................................................... 30
4-3-1 Setting Option Setup Method ......................................................................................................................................30
4-3-2 Option Items.......................................................................................................................................................................... 41
4-3-3 What to check before diagnosis ................................................................................................................................... 42
4-3-4 Number Display Method (Outdoor Unit, MCU, Cable remote control, wall-mount, etc.) ..................44
4-4 Appropriate Measures for Different Symptom ..................................................................................... 50
4-4-1 Outdoor Unit Operation Flow ....................................................................................................................................... 50
4-4-2 Main PCB has no power phenomenon ..................................................................................................................... 51
4-4-3 Indoor Unit ROOM sensor Error (Open/Short) ......................................................................................................52
4-4-4 Indoor unit EVAP IN sensor Error (Open/Short) ....................................................................................................53
4-4-5 Indoor EVAP OUT sensor Error (Open/Short) .........................................................................................................54
4-4-6 Indoor Heat Exchanger's EVAP IN sensor dislocation error.............................................................................55
4-4-7 Indoor Heat Exchanger's EVA OUT sensor dislocation error (Open/Short) .............................................. 56
4-4-8
imultaneous Indoor Heat Exchanger's EVA IN, OUT sensor dislocation error (Open/Short) ....................... 57
4-4-9 Electronic Expansion Valve opening malfunction (2nd stage) - ........................................ 58
4-4-10 Breakdown of EEV (2nd) ................................................................................................................................................ 59
4-4-11 Problem with EEV closure (2nd) ................................................................................................................................. 60
4-4-12 EEV(Electronic Expansion Valve) opening malfunction (2nd stage) ........................................................ 61
4-4-13
: EEV(Electronic Expansion Valve) closure malfunction (2nd stage) ............................62
4-4-14
: Detection of Floating Switch of Indoor Unit's Drain Pump ................................................ 63
4-4-15 The operational error of Indoor Unit's Fan Motor..............................................................................................64
4-4-16 Mixed operation Error (Only applicable to Heat Pump Model/Not to HR model) ..............................65
4-4-17 EEPROM error .................................................................................................................................................................... 66
4-4-18 Option error of the Remote Controller for an Indoor Unit ........................................................................... 67
4-4-19 Error due to confused use of Fahrenheit and Celsius .....................................................................................67
4-4-20 Simultaneous opening of Cooling/heating MCU SOL Valves 1st/2nd .................................................... 68
4-4-21 Error due to incorrect Indoor Unit Power/Communication Cable Connection ....................................69
4-4-22 SPI Feedback Error ........................................................................................................................................................... 70
4-4-23 Outdoor Unit Pipe Inspection Error ......................................................................................................................... 71
4-4-24 Communication Error between Indoor and Outdoor Units during Tracking ....................................... 72
4-4-25 Communication Error between Indoor and Outdoor Units after Tracking ...........................................73
4-4-26 Communication error between main and
sub Unit of outdoor unit or between outdoor units ........................................................................................ 74
4-4-27 Communication Error between MCU and Outdoor Unit ............................................................................... 75
4-4-28 Internal Communication error of the Outdoor Unit C-Box ............................................................................ 76
4-4-29 Internal PCB Communication error of the Outdoor Unit C-Box .................................................................. 77
4-4-30 Communication Error between MCU and Outdoor Unit after Tracking is Completed .................... 78
4-4-31 MCU branch part setup error – inconsecutive connection with the use of 2 branch parts ........... 79
4-4-32 MCU branch part setup error – Repeated setup for the same address over 3 times ........................ 80
4-4-33 MCU branch part setup error – non-installed address setup....................................................................... 81
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