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LG ARUV Series Service Manual
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LG ARUV Series Service Manual

LG ARUV Series Service Manual

Multi v plus system
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Internal Use Only
http://biz.lgservice.com
System

Air Conditioner

SVC MANUAL
MODEL : ARUV/ARUN Series
ARNU Series
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.

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Summary of Contents for LG ARUV Series

  • Page 1: Air Conditioner

    Internal Use Only http://biz.lgservice.com System Air Conditioner SVC MANUAL MODEL : ARUV/ARUN Series ARNU Series CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

  • Page 2: Table Of Contents

    Convertible Type ........................141 Floor Standing Type ........................153 Outdoor Units ......................163 Trouble shooting guide..................229 Exploded View & Replacement Parts List............297 - 2 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Safety Precautions

    • There is risk of fire or electric shock. • Improper wiring or installation may cause fire or electric shock. - 3 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 4 LGE are used, fire or explosion may result. R410A R407C - 4 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 • There is risk of fire, electric shock, or product • There is risk of fire, electric shock, explosion, or damage. injury. - 5 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 6 • To avoid vibration or water leakage. • If the gas leaks and accumulates around the unit, an explosion may result. 90˚ - 6 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 • It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation. - 7 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 Also support the outdoor unit at four points so that it cannot slip sideways. - 8 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 • Be careful and avoid personal injury. • There are sharp and moving parts that could cause personal injury. - 9 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 3. Combination of Outdoor Units ........14 4. Nomenclature..............15 4.1 Indoor Unit .............15 4.2 Outdoor Unit ............15 5. Outdoor Units information..........16 - 10 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 11: Model Names

    3Ø, 380 ~ 415V, 50Hz 2408T1 2608T1 2808T1 3008T1 3208T1 3408T1 3608T1 3808T1 4008T1 Cooling Only ARUV Heat Pump ARUN - 11 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: External Appearance

    ARNU18GCFA1 ARNU24GCFA1 ARNU18GVJA1 Without case ARNU24GVJA1 ARNU07GCEU1 ARNU09GCEU1 ARNU12GCEU1 ARNU18GCFU1 ARNU24GCFU1 These are model names of the basic function. - 12 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Outdoor Unit

    ARUV3408T1 / ARUN3408T1 ARUV3608T1 / ARUN3608T1 ARUV3808T1 / ARUN3808T1 ARUV4008T1 / ARUN4008T1 26, 28, 30, 32, 34, 36, 38, 40HP - 13 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 14: Combination Of Outdoor Units

    32HP 34HP 36HP 38HP 40HP Up to a maximum 40HP are realized by combining 8, 10, 12 and 14HP - 14 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Nomenclature

    B: AC Inverter and Heat Recovery S: Heat Recovery (Sub Unit) Indicates that this is System Outdoor Unit using the R410A - 15 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Outdoor Units Information

    Ø19.05(3/4) Ø19.05(3/4) Ø19.05(3/4) Ø19.05(3/4) Ø19.05(3/4) Ø19.05(3/4) Ø19.05(3/4) Gas Pipes[mm(inch)] Ø34.9(1 ) Ø34.9(1 ) Ø34.9(1 ) Ø34.9(1 ) Ø41.3(1 ) Ø41.3(1 ) Ø41.3(1 - 16 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 17: Heat Pump

    Ø19.05(3/4) Ø19.05(3/4) Ø19.05(3/4) Ø19.05(3/4) Ø19.05(3/4) Ø19.05(3/4) Ø19.05(3/4) Gas Pipes[mm(inch)] Ø34.9(1 ) Ø34.9(1 ) Ø34.9(1 ) Ø34.9(1 ) Ø41.3(1 ) Ø41.3(1 ) Ø41.3(1 - 17 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 - 18 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Indoor Units

    Low Static ................95 Built In ................105 High Static..............115 Wall Mounted(General) Wall Mounted ..............127 Convertible Convertible..............141 Floor Standing Floor Standing..............153 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 19 - Only for training and service purposes...
  • Page 20 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 20 - Only for training and service purposes...

  • Page 21: Ceiling Mounted Cassette Type (1Way)

    1. Specifications ................22 2. Functions ..................23 3. Operation Details................24 4. Dimensions .................26 5. Piping Diagrams .................27 6. Wiring Diagrams .................28 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 21 - Only for training and service purposes...

  • Page 22: Specifications

    3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 22 -...

  • Page 23: Functions

    • It is operating individually or totally by central control function. Central Control(Optional) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 23 - Only for training and service purposes...

  • Page 24: Operation Detail

    To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 24 - Only for training and service purposes...

  • Page 25: Heating Mode Operation

    The operation diagram is as following. Pipe temperature 35 °C 30 °C 27 °C 25 °C 22 °C Indoor fan SELECTED LOLOW speed COMP Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 25 - Only for training and service purposes...

  • Page 26: Dimensions

    Number Name Descripition Liquid pipe connection ø6.35 flare Gas pipe connection ø12.7 flare Air suction grill Air discharge grill Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 26 - Only for training and service purposes...

  • Page 27: Piping Diagrams

    Filter lndoor unit : Thermistor Refrigerant pipe connection port diameter [unit: mm(inch)] Model Liquid ARNU07GTJ*1 ARNU09GTJ*1 12.7(1/2) 6.35(1/4) ARNU12GTJ*1 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 27 - Only for training and service purposes...

  • Page 28: Wiring Diagrams

    PIPE THERMISTOR CN-PIPE/O DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR CN-ROOM ROOM SENSOR ROOM THERMISTOR CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 28 - Only for training and service purposes...

  • Page 29: Ceiling Mounted Cassette Type (2Way)

    1. Specifications ................30 2. Functions ..................32 3. Operation Details................33 4. Dimensions .................35 5. Piping Diagrams .................36 6. Wiring Diagrams .................37 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 29 - Only for training and service purposes...

  • Page 30: Specifications

    3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 30 -...
  • Page 31 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 31 -...

  • Page 32: Functions

    • It is operating individually or totally by central control function. Central Control(Optional) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 32 - Only for training and service purposes...

  • Page 33: Operation Details

    To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 33 - Only for training and service purposes...
  • Page 34 The operation diagram is as following. Pipe temperature 35 °C 30 °C 27 °C 25 °C 22 °C Indoor fan SELECTED LOLOW speed COMP Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 34 - Only for training and service purposes...

  • Page 35: Dimensions

    Descripition Liquid pipe connection (18k) Ø6.35, (24k)Ø9.52 Gas pipe connection (18k) Ø12.7, (24k)Ø15.88 Air discharge grill Air suction grill Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 35 - Only for training and service purposes...

  • Page 36: Piping Diagrams

    : Thermistor Refrigerant pipe connection port diameter [unit: mm(inch)] Model Liquid ARNU18GTL*1 Ø12.7(1/2) Ø6.35(1/4) ARNU24GTL*1 Ø15.88(5/8) Ø9.52(3/8) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 36 - Only for training and service purposes...

  • Page 37: Wiring Diagrams

    PIPE THERMISTOR CN-PIPE/O DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR CN-ROOM ROOM SENSOR ROOM THERMISTOR CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 37 - Only for training and service purposes...
  • Page 38 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 38 - Only for training and service purposes...

  • Page 39: Ceiling Mounted Cassette Type (4Way)

    1. Specifications ................40 2. Functions ..................43 3. Operation Details................44 4. Dimensions .................46 5. Piping Diagrams .................48 6. Wiring Diagrams .................49 Copyright ©2009 LG Electronics. Inc. All right reserved. - 39 - LGE Internal Use Only Only for training and service purposes...

  • Page 40: Specifications

    4. EEV : Electronic Expansion Valve 5. To be added for more available Models * A : Basic Model B : Plasma Model Copyright ©2009 LG Electronics. Inc. All right reserved. - 40 - LGE Internal Use Only Only for training and service purposes...
  • Page 41 4. EEV : Electronic Expansion Valve 5. To be added for more available Models * A : Basic Model B : Plasma Model Copyright ©2009 LG Electronics. Inc. All right reserved. - 41 - LGE Internal Use Only Only for training and service purposes...
  • Page 42 4. EEV : Electronic Expansion Valve 5. To be added for more available Models * A : Basic Model B : Plasma Model Copyright ©2009 LG Electronics. Inc. All right reserved. - 42 - LGE Internal Use Only Only for training and service purposes...

  • Page 43: Functions

    • It is operating individually or totally by central control function. Central Control(Optional) Swirl Swing Control • It is operating swirl swing Copyright ©2009 LG Electronics. Inc. All right reserved. - 43 - LGE Internal Use Only Only for training and service purposes...
  • Page 44 Vane 2, 4 is almost vane closed while vane1, 3 is opened. Vane 1, 3 and vane 2,4 turn over minutely Vane 1 Vane 3 Vane 4 Copyright ©2009 LG Electronics. Inc. All right reserved. - 44 - LGE Internal Use Only Only for training and service purposes...

  • Page 45: Operation Details

    The operation diagram is as following. Pipe temperature 35 °C 30 °C 27 °C 25 °C 22 °C Indoor fan SELECTED LOLOW speed COMP Copyright ©2009 LG Electronics. Inc. All right reserved. - 45 - LGE Internal Use Only Only for training and service purposes...

  • Page 46: Dimensions

    Gas pipe connection Unit size(9k, 12k, 18k):Ø12.7 Drain pipe connection Power supply connection Air discharge grill Air suction grill Copyright ©2009 LG Electronics. Inc. All right reserved. - 46 - LGE Internal Use Only Only for training and service purposes...
  • Page 47 Gas pipe connection Unit Size(24k, 28k, 36k, 42k, 48k):Ø15.88 Drain pipe connection Power supply connection Air discharge grill Air suction grill Copyright ©2009 LG Electronics. Inc. All right reserved. - 47 - LGE Internal Use Only Only for training and service purposes...

  • Page 48: Piping Diagrams

    Ø6.35(1/4) ARNU18GTE*1 Ø12.7(1/2) Ø6.35(1/4) ARNU24GTH*1 Ø15.88(5/8) Ø9.52(3/8) ARNU28GTH*1 Ø15.88(5/8) Ø9.52(3/8) ARNU36GTD*1 Ø15.88(5/8) Ø9.52(3/8) ARNU42GTD*1 Ø15.88(5/8) Ø9.52(3/8) ARNU48GTD*1 Ø15.88(5/8) Ø9.52(3/8) Copyright ©2009 LG Electronics. Inc. All right reserved. - 48 - LGE Internal Use Only Only for training and service purposes...

  • Page 49: Wiring Diagrams

    PIPE THERMISTOR CN-PIPE/O DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR CN-ROOM ROOM SENSOR ROOM THERMISTOR CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE Copyright ©2009 LG Electronics. Inc. All right reserved. - 49 - LGE Internal Use Only Only for training and service purposes...
  • Page 50 Copyright ©2009 LG Electronics. Inc. All right reserved. - 50 - LGE Internal Use Only Only for training and service purposes...

  • Page 51: Art Cool Type

    1. Specification ................52 2. Functions ..................53 3. Operation Details................54 4. Dimensions .................61 5. Piping Diagrams .................62 6. Wiring Diagrams .................63 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 51 - Only for training and service purposes...

  • Page 52: Specification

    3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 52 -...

  • Page 53: Functions

    • The louver can be set at the desired position or swing at 28°C. up and down automatically. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 53 - Only for training and service purposes...

  • Page 54: Operation Details

    • While in compressor running, operating with the airflow speed set by the remote controller. While in com- pressor not running, operating with the low airflow speed regardless of the setting. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 55 Compressor OFF Temp => Setting Temp+0.5°C • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 55 -...
  • Page 56 When 0.5°C or more above the setting temp, the compressor is turned on. Compressor ON Temp => Setting Temp+0.5°C Compressor OFF Temp => Setting Temp+0.5°C Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 56 - Only for training and service purposes...
  • Page 57 • The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached. • If the appliance is on pause at the time set by the timer, the pause continues. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...

  • Page 58: Sleep Timer Operation

    • Operation Mode that is kept on the memory - State of Operation ON/OFF Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 58 -...

  • Page 59: Forced Operation

    • When a key is input by the remote control while the slide switch on the main unit of the appliance is on the forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that the remote control signal cannot be received. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 59 -...
  • Page 60 • When inlet grille of air conditioner is opened during plasma operation, High Voltage Generator(H.V.B) is to be stopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B) will be operated again. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 60 -...

  • Page 61: Dimensions

    Liquid 7, 9, 12k Ø6.35 Ø12.7 More than 50cm More than 50cm More than 1.5m Model ARNU07GSP*1 ARNU09GSP*1 ARNU12GSP*1 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 61 - Only for training and service purposes...

  • Page 62: Piping Diagrams

    Refrigerant pipe connection port diameter [unit: mm(inch)] Model Liquid ARNU07GSP*1 12.7(1/2) 6.35(1/4) ARNU09GSP*1 ARNU12GSP*1 *(Color): M(Metal), D(Wood), B(Blue), W(White) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 62 - Only for training and service purposes...

  • Page 63: Wiring Diagrams

    STEP MOTOR STEP MOTOR OUTPUT CN-TH1 ROOM/PIPE SENSOR ROOM AND PIPE THERMISTOR CN-TH2 DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 63 - Only for training and service purposes...
  • Page 64 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 64 - Only for training and service purposes...

  • Page 65: Art Cool Type(Wide)

    1. Specification ................66 2. Functions ..................67 3. Operation Details................68 4. Dimensions .................75 5. Piping Diagrams .................76 6. Wiring Diagrams .................77 Copyright ©2009 LG Electronics. Inc. All right reserved. - 65 - LGE Internal Use Only Only for training and service purposes...

  • Page 66: Specification

    3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 66 - LGE Internal Use Only...

  • Page 67: Functions

    • The louver can be set at the desired position or swing at 28°C. up and down automatically. Copyright ©2009 LG Electronics. Inc. All right reserved. - 67 - LGE Internal Use Only Only for training and service purposes...

  • Page 68: Operation Details

    • While in compressor running, operating with the airflow speed set by the remote controller. While in compres- sor not running, operating with the low airflow speed regardless of the setting. Copyright ©2009 LG Electronics. Inc. All right reserved. - 68 -...
  • Page 69 Compressor OFF Temp => Setting Temp+0.5°C • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. Copyright ©2009 LG Electronics. Inc. All right reserved. - 69 - LGE Internal Use Only...
  • Page 70 When 0.5°C or more above the setting temp, the compressor is turned on. Compressor ON Temp => Setting Temp+0.5°C Compressor OFF Temp => Setting Temp+0.5°C Copyright ©2009 LG Electronics. Inc. All right reserved. - 70 - LGE Internal Use Only Only for training and service purposes...
  • Page 71 • The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached. • If the appliance is on pause at the time set by the timer, the pause continues. Copyright ©2009 LG Electronics. Inc. All right reserved. - 71 -...
  • Page 72 • Operation Mode that is kept on the memory Copyright ©2009 LG Electronics. Inc. All right reserved. - 72 - LGE Internal Use Only...

  • Page 73: Test Operation Control

    • Outdoor fan motor stops when indoor pipe temperature is blow 3°C and restarts at the pipe temperature above 6°C or after 90 seconds, if the pipe temperature does not rise to 6°C, outdoor fan motor runs continuously at even below 3°C. Copyright ©2009 LG Electronics. Inc. All right reserved. - 73 - LGE Internal Use Only...
  • Page 74 • When inlet grille of air conditioner is opened during plasma operation, High Voltage Generator(H.V.B) is to be stopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B) will be operated again. Copyright ©2009 LG Electronics. Inc. All right reserved. - 74 - LGE Internal Use Only...

  • Page 75: Dimensions

    Pipe Hole More than 20cm More than More than 50cm 50cm More than 1.5m 60mm 60mm (Unit: mm) Model ARNU18GSV*1 Copyright ©2009 LG Electronics. Inc. All right reserved. - 75 - LGE Internal Use Only Only for training and service purposes...

  • Page 76: Piping Diagrams

    : Thermistor Refrigerant pipe connection port diameter [unit: mm(inch)] Model Liquid ARNU18GSV*1 Ø12.7(1/2) Ø6.35(1/4) *(Color): M(Metal), D(Wood), B(Blue), W(White) Copyright ©2009 LG Electronics. Inc. All right reserved. - 76 - LGE Internal Use Only Only for training and service purposes...

  • Page 77: Wiring Diagrams

    ROOM AND PIPE THERMISTOR CN-TH2 DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR CN-MOTOR1 AC FAN MOTOR OUTPUT MOTOR OUTPUT OF PHASE CONTROL Copyright ©2009 LG Electronics. Inc. All right reserved. - 77 - LGE Internal Use Only Only for training and service purposes...
  • Page 78 Copyright ©2009 LG Electronics. Inc. All right reserved. - 78 - LGE Internal Use Only Only for training and service purposes...

  • Page 79: Art Cool Type(Mirror)

    1. Specification ................80 2. Functions ..................82 3. Operation Details................83 4. Dimensions .................90 5. Piping Diagrams .................91 6. Wiring Diagrams .................92 Copyright ©2009 LG Electronics. Inc. All right reserved. - 79 - LGE Internal Use Only Only for training and service purposes...

  • Page 80: Specification

    3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 80 - LGE Internal Use Only...
  • Page 81 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 81 - LGE Internal Use Only...

  • Page 82: Functions

    • The louver can be set at the desired position or swing at 28°C. up and down automatically. Copyright ©2009 LG Electronics. Inc. All right reserved. - 82 - LGE Internal Use Only Only for training and service purposes...

  • Page 83: Operation Details

    • While in compressor running, operating with the airflow speed set by the remote controller. While in compres- sor not running, operating with the low airflow speed regardless of the setting. Copyright ©2009 LG Electronics. Inc. All right reserved. - 83 -...
  • Page 84 Fuzzy rule. • While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper- ature Copyright ©2009 LG Electronics. Inc. All right reserved. - 84 - LGE Internal Use Only...
  • Page 85 When 0.5°C or more above the setting temp, the compressor is turned on. Compressor ON Temp => Setting Temp+0.5°C Compressor OFF Temp => Setting Temp+0.5°C Copyright ©2009 LG Electronics. Inc. All right reserved. - 85 - LGE Internal Use Only Only for training and service purposes...
  • Page 86 • The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached. • If the appliance is on pause at the time set by the timer, the pause continues. Copyright ©2009 LG Electronics. Inc. All right reserved. - 86 -...
  • Page 87 • Operation Mode that is kept on the memory Copyright ©2009 LG Electronics. Inc. All right reserved. - 87 - LGE Internal Use Only...
  • Page 88 • Outdoor fan motor stops when indoor pipe temperature is blow 3°C and restarts at the pipe temperature above 6°C or after 90 seconds, if the pipe temperature does not rise to 6°C, outdoor fan motor runs continuously at even below 3°C. Copyright ©2009 LG Electronics. Inc. All right reserved. - 88 - LGE Internal Use Only...
  • Page 89 • When inlet grille of air conditioner is opened during plasma operation, High Voltage Generator(H.V.B) is to be stopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B) will be operated again. Copyright ©2009 LG Electronics. Inc. All right reserved. - 89 - LGE Internal Use Only...

  • Page 90: Dimensions

    ARNU09GSE*1 ARNU12GSE*1 More than 1030 More than 2.3m 1030 (unit : mm) Model ARNU07GSE*1 ARNU09GSE*1 ARNU12GSE*1 ARNU18GS3*1 1170 ARNU24GS3*1 Copyright ©2009 LG Electronics. Inc. All right reserved. - 90 - LGE Internal Use Only Only for training and service purposes...

  • Page 91: Piping Diagrams

    ARNU18GS3*1 Ø12.7(1/2) Ø6.35(1/4) ARNU24GS3*1 Ø15.88(5/8) Ø9.52(3/8) *SE-(Color) : R(Mirror),V(Silver), B(Blue) S3 -(Color) : R(Mirror), M(Metal), B(Blue), D(Wood), W(White), C(Cherry) Copyright ©2009 LG Electronics. Inc. All right reserved. - 91 - LGE Internal Use Only Only for training and service purposes...

  • Page 92: Wiring Diagrams

    DISPLAY OF INDOOR STATUS CN-CON SAFETY CONNECTION SAFETY OF INDOOR STATUS CN_AC/DC AC/DC CONNECTION CONNECTION BETWEEN AC PCB AND DC PCB Copyright ©2009 LG Electronics. Inc. All right reserved. - 92 - LGE Internal Use Only Only for training and service purposes...
  • Page 93 DISPLAY OF INDOOR STATUS CN-CON SAFETY CONNECTION SAFETY OF INDOOR STATUS CN_AC/DC AC/DC CONNECTION CONNECTION BETWEEN AC PCB AND DC PCB Copyright ©2009 LG Electronics. Inc. All right reserved. - 93 - LGE Internal Use Only Only for training and service purposes...
  • Page 94 Copyright ©2009 LG Electronics. Inc. All right reserved. - 94 - LGE Internal Use Only Only for training and service purposes...

  • Page 95: Ceiling Concealed Duct Type (Low Static)

    1. Specifications ................96 2. Funtion ..................98 3. Operation Details................99 4. Dimensions ................102 5. Piping Diagrams ...............103 6. Wiring Diagrams ...............104 Copyright ©2009 LG Electronics. Inc. All right reserved. - 95 - LGE Internal Use Only Only for training and service purposes...
  • Page 96 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 96 - LGE Internal Use Only...

  • Page 97: Specifications

    3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 97 - LGE Internal Use Only...

  • Page 98: Funtion

    • A standard drain-head height of up to 700mm is possible. • It is operating individually or totally by central control function. Central Control(Optional) Copyright ©2009 LG Electronics. Inc. All right reserved. - 98 - LGE Internal Use Only Only for training and service purposes...

  • Page 99: Operation Details

    To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 Copyright ©2009 LG Electronics. Inc. All right reserved. - 99 - LGE Internal Use Only Only for training and service purposes...
  • Page 100 25°C 25°C 25°C 25°C 25°C 28°C 28°C Setting Temperature T 27°C 27°C 27°C 27°C 27°C 27°C 27°C 30°C 30°C Copyright ©2009 LG Electronics. Inc. All right reserved. - 100 - LGE Internal Use Only Only for training and service purposes...
  • Page 101 4way Valve • Initial Hotstart On state Power Off Operation Off Cooling operation Heating operation Defrost operation Copyright ©2009 LG Electronics. Inc. All right reserved. - 101 - LGE Internal Use Only Only for training and service purposes...

  • Page 102: Dimensions

    (unit: mm) H=20 or more Suitable dimension "H" is necessary to get a slope to drain as figure Front Copyright ©2009 LG Electronics. Inc. All right reserved. - 102 - LGE Internal Use Only Only for training and service purposes...

  • Page 103: Piping Diagrams

    Refrigerant pipe connection port diameter [unit: mm(inch)] MODEL LIQUID ARNU07GB1G1 / ARNU09GB1G1 Ø12.7(1/2) Ø6.35(1/4) ARNU12GB1G1 / ARNU18GB2G1 ARNU24GB2G1 Ø15.88(5/8) Ø9.52(3/8) Copyright ©2009 LG Electronics. Inc. All right reserved. - 103 - LGE Internal Use Only Only for training and service purposes...

  • Page 104: Wiring Diagrams

    DRAIN PUMP OUTPUT WHITE AC OUTPUT FOR DRAIN PUMP CN-POWER AC POWER SUPPLY WHITE AC POWER LINE INPUT FOR INDOOR CONTROLLER Copyright ©2009 LG Electronics. Inc. All right reserved. - 104 - LGE Internal Use Only Only for training and service purposes...

  • Page 105: Ceiling Concealed Duct Type (Built In)

    1. Specifications ................106 2. Funtion ..................108 3. Operation Details..............109 4. Dimensions ................112 5. Piping Diagrams ...............113 6. Wiring Diagrams ...............114 Copyright ©2009 LG Electronics. Inc. All right reserved. - 105 - LGE Internal Use Only Only for training and service purposes...

  • Page 106: Specifications

    3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 106 - LGE Internal Use Only...
  • Page 107 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 107 - LGE Internal Use Only...

  • Page 108: Funtion

    • A standard drain-head height of up to 700mm is possible. • It is operating individually or totally by central control function. Central Control(Optional) Copyright ©2009 LG Electronics. Inc. All right reserved. - 108 - LGE Internal Use Only Only for training and service purposes...

  • Page 109: Operation Details

    To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 Copyright ©2009 LG Electronics. Inc. All right reserved. - 109 - LGE Internal Use Only Only for training and service purposes...
  • Page 110 25°C 25°C 25°C 25°C 25°C 28°C 28°C Setting Temperature T 27°C 27°C 27°C 27°C 27°C 27°C 27°C 30°C 30°C Copyright ©2009 LG Electronics. Inc. All right reserved. - 110 - LGE Internal Use Only Only for training and service purposes...
  • Page 111 4way Valve • Initial Hotstart On state Power Off Operation Off Cooling operation Heating operation Defrost operation Copyright ©2009 LG Electronics. Inc. All right reserved. - 111 - LGE Internal Use Only Only for training and service purposes...

  • Page 112: Dimensions

    (unit: mm) Control box Suitable dimension "H" is necessary to get a slope to drain as given in the figure Copyright ©2009 LG Electronics. Inc. All right reserved. - 112 - LGE Internal Use Only Only for training and service purposes...

  • Page 113: Piping Diagrams

    ARNU07GB3G1+PBSGB10(Acc'y), PBSC10(Acc'y) Ø12.7(1/2) Ø6.35(1/4) ARNU09GB3G1+PBSGB10(Acc'y), PBSC10(Acc'y) Ø12.7(1/2) Ø6.35(1/4) ARNU12GB3G1+PBSGB10(Acc'y), PBSC10(Acc'y) Ø12.7(1/2) Ø6.35(1/4) ARNU18GB4G1+PBSGB20(Acc'y), PBSC20(Acc'y) Ø12.7(1/2) Ø6.35(1/4) ARNU24GB4G1+PBSGB20(Acc'y), PBSC20(Acc'y) Ø15.88(5/8) Ø9.52(3/8) Copyright ©2009 LG Electronics. Inc. All right reserved. - 113 - LGE Internal Use Only Only for training and service purposes...

  • Page 114: Wiring Diagrams

    PIPE THERMISTOR CN-PIPE/O DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR CN-ROOM ROOM SENSOR ROOM THERMISTOR CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE Copyright ©2009 LG Electronics. Inc. All right reserved. - 114 - LGE Internal Use Only Only for training and service purposes...

  • Page 115: Ceiling Concealed Duct Type (High Static)

    1. Specifications ................116 2. Funtion ..................119 3. Operation Details..............120 4. Dimensions ................123 5. Piping Diagrams ...............124 6. Wiring Diagrams ...............125 Copyright ©2009 LG Electronics. Inc. All right reserved. - 115 - LGE Internal Use Only Only for training and service purposes...

  • Page 116: Specifications

    3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 116 - LGE Internal Use Only...
  • Page 117 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 117 - LGE Internal Use Only...
  • Page 118 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 118 - LGE Internal Use Only...

  • Page 119: Funtion

    • A standard drain-head height of up to 700mm is possible. • It is operating individually or totally by central control function. Central Control(Optional) Copyright ©2009 LG Electronics. Inc. All right reserved. - 119 - LGE Internal Use Only Only for training and service purposes...

  • Page 120: Operation Details

    More than More than 3 minutes 3 minutes Selecting Selecting Selecting INDOOR FAN fan speed fan speed fan speed COMPRESSOR Copyright ©2009 LG Electronics. Inc. All right reserved. - 120 - LGE Internal Use Only Only for training and service purposes...
  • Page 121 25°C 25°C 25°C 25°C 25°C 28°C 28°C Setting Temperature T 27°C 27°C 27°C 27°C 27°C 27°C 27°C 30°C 30°C Copyright ©2009 LG Electronics. Inc. All right reserved. - 121 - LGE Internal Use Only Only for training and service purposes...
  • Page 122 4way Valve • Initial Hotstart On state Power Off Operation Off Cooling operation Heating operation Defrost operation Copyright ©2009 LG Electronics. Inc. All right reserved. - 122 - LGE Internal Use Only Only for training and service purposes...

  • Page 123: Dimensions

    (unit: mm) (600X600) Control box Suitable dimension "H" is necessary to get a slope to drain as figure. Front Copyright ©2009 LG Electronics. Inc. All right reserved. - 123 - LGE Internal Use Only Only for training and service purposes...

  • Page 124: Piping Diagrams

    Ø6.35(1/4) ARNU18GBHA1 Ø12.7(1/2) Ø6.35(1/4) ARNU24GBHA1 Ø15.88(5/8) Ø9.52(3/8) ARNU28GBGA1 Ø15.88(5/8) Ø9.52(3/8) ARNU36GBGA1 Ø15.88(5/8) Ø9.52(3/8) ARNU42GBGA1 Ø15.88(5/8) Ø9.52(3/8) ARNU48GBRA1 Ø15.88(5/8) Ø9.52(3/8) Copyright ©2009 LG Electronics. Inc. All right reserved. - 124 - LGE Internal Use Only Only for training and service purposes...

  • Page 125: Wiring Diagrams

    PIPE THERMISTOR CN-PIPE/O DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR CN-ROOM ROOM SENSOR ROOM THERMISTOR CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE Copyright ©2009 LG Electronics. Inc. All right reserved. - 125 - LGE Internal Use Only Only for training and service purposes...
  • Page 126 DISCHARGE PIPE THERMISTOR CN-ROOM ROOM SENSOR ROOM THERMISTOR CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE CN-INFANSUB STARTING SIGNAL CONTROL STARTING SIGNAL CONTROL Copyright ©2009 LG Electronics. Inc. All right reserved. - 126 - LGE Internal Use Only Only for training and service purposes...

  • Page 127: Wall Mounted Type

    1. Specification ................128 2. Functions ..................130 3. Operation Details..............131 4. Dimensions ................138 5. Piping Diagrams ...............139 6. Wiring Diagrams ...............140 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 127 - Only for training and service purposes...

  • Page 128: Specification

    3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 128 -...
  • Page 129 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 129 -...

  • Page 130: Functions

    • The louver can be set at the desired position or swing at 28°C. up and down automatically. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 130 - Only for training and service purposes...

  • Page 131: Operation Details

    • While in compressor running, operating with the airflow speed set by the remote controller. While in com- pressor not running, operating with the low airflow speed regardless of the setting. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 132 Compressor OFF Temp => Setting Temp+0.5°C • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 132 -...
  • Page 133 When 0.5°C or more above the setting temp, the compressor is turned on. Compressor ON Temp => Setting Temp+0.5°C Compressor OFF Temp => Setting Temp+0.5°C Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 133 - Only for training and service purposes...
  • Page 134 • The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached. • If the appliance is on pause at the time set by the timer, the pause continues. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 135 • Operation Mode that is kept on the memory - State of Operation ON/OFF Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 135 -...
  • Page 136 • When a key is input by the remote control while the slide switch on the main unit of the appliance is on the forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that the remote control signal cannot be received. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 136 -...
  • Page 137 • When inlet grille of air conditioner is opened during plasma operation, High Voltage Generator(H.V.B) is to be stopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B) will be operated again. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 137 -...

  • Page 138: Dimensions

    4. Dimensions ARNU07GSE*1 ARNU09GSE*1 ARNU12GSE*1 ARNU18GS5*1 ARNU24GS5*1 1090 Installation plate (unit:mm) Model SE(7, 9, 12K) S5(18, 24K) Dimension 1090 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 138 - Only for training and service purposes...

  • Page 139: Piping Diagrams

    [unit: mm(inch)] MODEL LIQUID ARNU07GSE*1 Ø12.7(1/2) Ø6.35(1/4) ARNU09GSE*1 Ø12.7(1/2) Ø6.35(1/4) ARNU12GSE*1 Ø12.7(1/2) Ø6.35(1/4) ARNU18GS5*1 Ø12.7(1/2) Ø6.35(1/4) ARNU24GS5*1 Ø15.88(5/8) Ø9.52(3/8) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 139 - Only for training and service purposes...

  • Page 140: Wiring Diagrams

    CN-EEV EEV OUTPUT EEV CONTROL OUTPUT CN-U/D STEP MOTOR STEP MOTOR OUTPUT CN-TH1 ROOM/PIPE SENSOR ROOM AND PIPE THERMISTOR Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 140 - Only for training and service purposes...

  • Page 141: Convertible Type

    1. Specifications ................142 2. Funtion ..................144 3. Operation Details..............145 4. Dimensions ................148 5. Piping Diagrams ...............150 6. Wiring Diagrams ...............151 Copyright ©2009 LG Electronics. Inc. All right reserved. - 141 - LGE Internal Use Only Only for training and service purposes...

  • Page 142: Specifications

    3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 142 - LGE Internal Use Only...
  • Page 143 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 143 - LGE Internal Use Only...

  • Page 144: Funtion

    • A standard drain-head height of up to 700mm is possible. • It is operating individually or totally by central control function. Central Control(Optional) Copyright ©2009 LG Electronics. Inc. All right reserved. - 144 - LGE Internal Use Only Only for training and service purposes...

  • Page 145: Operation Details

    To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 Copyright ©2009 LG Electronics. Inc. All right reserved. - 145 - LGE Internal Use Only Only for training and service purposes...
  • Page 146 25°C 25°C 25°C 25°C 25°C 28°C 28°C Setting Temperature T 27°C 27°C 27°C 27°C 27°C 27°C 27°C 30°C 30°C Copyright ©2009 LG Electronics. Inc. All right reserved. - 146 - LGE Internal Use Only Only for training and service purposes...
  • Page 147 4way Valve • Initial Hotstart On state Power Off Operation Off Cooling operation Heating operation Defrost operation Copyright ©2009 LG Electronics. Inc. All right reserved. - 147 - LGE Internal Use Only Only for training and service purposes...

  • Page 148: Dimensions

    200 Left rear piping Right rear piping (Ø45) Foor Suspension bolts Spring washer Hangen Max. Washer 12mm Copyright ©2009 LG Electronics. Inc. All right reserved. - 148 - LGE Internal Use Only Only for training and service purposes...
  • Page 149 Signal Receptor Cover washer Hangen Air Filter Max. Washer 12mm Left Side DIM. Cover MODEL Inlet Grill Drain hose Copyright ©2009 LG Electronics. Inc. All right reserved. - 149 - LGE Internal Use Only Only for training and service purposes...

  • Page 150: Piping Diagrams

    : Thermistor Refrigerant pipe connection port diameter [unit: mm(inch)] MODEL LIQUID ARNU09GVEA1 ARNU12GVEA1 Ø12.7(1/2) Ø6.35(1/4) ARNU18GVJA1 ARNU24GVJA1 Ø15.88(5/8) Ø9.52(3/8) Copyright ©2009 LG Electronics. Inc. All right reserved. - 150 - LGE Internal Use Only Only for training and service purposes...

  • Page 151: Wiring Diagrams

    WHEN DOOR OPEN, OPERATION STOP CN-STEP/M1 STEP MOTOR YELLOW STEP MOTOR OUTPUT CN-DISPLAY DISPLAY GRAY DISPLAY OF INDOOR STATUS Copyright ©2009 LG Electronics. Inc. All right reserved. - 151 - LGE Internal Use Only Only for training and service purposes...
  • Page 152 Copyright ©2009 LG Electronics. Inc. All right reserved. - 152 - LGE Internal Use Only Only for training and service purposes...

  • Page 153: Floor Standing Type

    1. Specifications ................154 2. Funtion ..................156 3. Operation Details..............157 4. Dimensions ................160 5. Piping Diagrams ...............161 6. Wiring Diagrams ...............162 Copyright ©2009 LG Electronics. Inc. All right reserved. - 153 - LGE Internal Use Only Only for training and service purposes...

  • Page 154: Specifications

    3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 154 - LGE Internal Use Only...
  • Page 155 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve 5. To be added for more available Models Copyright ©2009 LG Electronics. Inc. All right reserved. - 155 - LGE Internal Use Only...

  • Page 156: Funtion

    • A standard drain-head height of up to 700mm is possible. • It is operating individually or totally by central control function. Central Control(Optional) Copyright ©2009 LG Electronics. Inc. All right reserved. - 156 - LGE Internal Use Only Only for training and service purposes...

  • Page 157: Operation Details

    To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 Copyright ©2009 LG Electronics. Inc. All right reserved. - 157 - LGE Internal Use Only Only for training and service purposes...
  • Page 158 25°C 25°C 25°C 25°C 25°C 28°C 28°C Setting Temperature T 27°C 27°C 27°C 27°C 27°C 27°C 27°C 30°C 30°C Copyright ©2009 LG Electronics. Inc. All right reserved. - 158 - LGE Internal Use Only Only for training and service purposes...
  • Page 159 4way Valve • Initial Hotstart On state Power Off Operation Off Cooling operation Heating operation Defrost operation Copyright ©2009 LG Electronics. Inc. All right reserved. - 159 - LGE Internal Use Only Only for training and service purposes...

  • Page 160: Dimensions

    ARNU12GCEU1 ARNU18GCFA1 1,345 ARNU18GCFU1 1,256 ARNU24GCFA1 1,345 ARNU24GCFU1 1,256 Air Outlet Air Filter Air Inlet Without Case With Case Copyright ©2009 LG Electronics. Inc. All right reserved. - 160 - LGE Internal Use Only Only for training and service purposes...

  • Page 161: Piping Diagrams

    : Thermistor Refrigerant pipe connection port diameter [unit: mm(inch)] MODEL LIQUID ARNU07GCE*1 ARNU09GCE*1 Ø12.7(1/2) Ø6.35(1/4) ARNU12GCE*1 ARNU18GCF*1 ARNU24GCF*1 Ø15.88(5/8) Ø9.52(3/8) Copyright ©2009 LG Electronics. Inc. All right reserved. - 161 - LGE Internal Use Only Only for training and service purposes...

  • Page 162: Wiring Diagrams

    DRAIN PUMP OUTPUT WHITE AC OUTPUT FOR DRAIN PUMP CN-POWER AC POWER SUPPLY WHITE AC POWER LINE INPUT FOR INDOOR CONTROLLER Copyright ©2009 LG Electronics. Inc. All right reserved. - 162 - LGE Internal Use Only Only for training and service purposes...

  • Page 163: Outdoor Units

    Part 3 Outdoor Units Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 163 - Only for training and service purposes...
  • Page 164 2. Function ..................176 3. Dimensions` ................179 4. Piping Diagrams ...............183 5. Wiring Diagrams ...............192 6. Function ..................196 7. Test Run ..................220 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 164 - Only for training and service purposes...
  • Page 165 2. Capacities are net capacities 3. Due to our policy of innovation some specifications may be changed without notification 4. E.E.V.:Linear Expansion Valve Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 165 - Only for training and service purposes...
  • Page 166 2. Capacities are net capacities 3. Due to our policy of innovation some specifications may be changed without notification 4. E.E.V.:Linear Expansion Valve Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 166 - Only for training and service purposes...
  • Page 167 2. Capacities are net capacities 3. Due to our policy of innovation some specifications may be changed without notification 4. E.E.V.:Linear Expansion Valve Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 167 - Only for training and service purposes...
  • Page 168 2. Capacities are net capacities 3. Due to our policy of innovation some specifications may be changed without notification 4. E.E.V.:Linear Expansion Valve Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 168 - Only for training and service purposes...
  • Page 169 2. Capacities are net capacities 3. Due to our policy of innovation some specifications may be changed without notification 4. E.E.V.:Linear Expansion Valve Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 169 - Only for training and service purposes...
  • Page 170 2. Capacities are net capacities 3. Due to our policy of innovation some specifications may be changed without notification 4. E.E.V.:Linear Expansion Valve Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 170 - Only for training and service purposes...
  • Page 171 2. Capacities are net capacities 3. Due to our policy of innovation some specifications may be changed without notification 4. E.E.V.:Linear Expansion Valve Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 171 - Only for training and service purposes...
  • Page 172 2. Capacities are net capacities 3. Due to our policy of innovation some specifications may be changed without notification 4. E.E.V.:Linear Expansion Valve Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 172 - Only for training and service purposes...
  • Page 173 2. Capacities are net capacities 3. Due to our policy of innovation some specifications may be changed without notification 4. E.E.V.:Linear Expansion Valve Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 173 - Only for training and service purposes...
  • Page 174 2. Capacities are net capacities 3. Due to our policy of innovation some specifications may be changed without notification 4. E.E.V.:Linear Expansion Valve Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 174 - Only for training and service purposes...
  • Page 175 Check solenoid Valve CSOL reduces to less than the valve. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 175 - Only for training and service purposes...
  • Page 176 Sensor(TINV) (Constant speed compressor Hot Gas discharge Bypass pipe) valve(HGV) High Pressure Low Pressure Discharge Check Sensor(HPS) Sensor(LPS) Valve(DCHK) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 176 - Only for training and service purposes...
  • Page 177 (OEEV) Square Junction Valve (4WAY) Excessive Cold Inlet Liquid Tube Excessive Cold Temperature Temperature Outlet Sensor(TSIN) Sensor(TLIQ) Temperature Sensor(TSOUT) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 177 - Only for training and service purposes...
  • Page 178 Gas Tube Valve Service Tube Service Mount Valve Service Valve Valve Separator Excessive Cold Heat Exchanger Base Pan Strainer Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 178 - Only for training and service purposes...
  • Page 179 806(31.5) mm(inch) 1607(63.3) mm(inch) 730(28.7) mm(inch) 1427(56.1) mm(inch) 692(27.2) mm(inch) 670(26.3) mm(inch) 500(19.7) mm(inch) 704(27.7) mm(inch) 99(3.9) mm(inch) 82(3.2) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 179 - Only for training and service purposes...
  • Page 180 1280(50.4) mm(inch) 1607(63.3) mm(inch) 730(28.7) mm(inch) 1427(56.1) mm(inch) 692(27.2) mm(inch) 670(26.3) mm(inch) 900(35.4) mm(inch) 704(27.7) mm(inch) 99(3.9) mm(inch) 82(3.2) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 180 - Only for training and service purposes...
  • Page 181 4. The Units should be installed to leave sufficient space in front for the on site refrigerant piping work to be carried out comfortably. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 181 -...
  • Page 182 4. The Units should be installed to leave sufficient space in front for the on site refrigerant piping work to be carried out comfortably. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 182 - Outdoor Unit...

  • Page 183: Cooling Operation

    Thermistor : Inverter compressor Solenoid valve : Linear Expansion Valve : Oil Separator Service valve Accum. : Accumulator Strainer Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 183 - Only for training and service purposes...

  • Page 184: Heating Operation

    : Inverter compressor Solenoid valve : Linear Expansion Valve : Oil Separator Service valve Accum. : Accumulator Strainer Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 184 - Outdoor Unit Only for training and service purposes...
  • Page 185 Thermistor : Inverter compressor Solenoid valve : Linear Expansion Valve : Oil Separator Service valve Accum. : Accumulator Strainer Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 185 - Only for training and service purposes...
  • Page 186 Solenoid valve : Constant speed compressor : Linear Expansion Valve Service valve : Oil Separator Accum. : Accumulator Strainer Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 186 - Only for training and service purposes...
  • Page 187 Solenoid valve : Constant speed compressor : Linear Expansion Valve Service valve : Oil Separator Accum. : Accumulator Strainer Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 187 - Only for training and service purposes...
  • Page 188 Solenoid valve : Constant speed compressor : Linear Expansion Valve Service valve : Oil Separator Accum. : Accumulator Strainer Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 188 - Only for training and service purposes...
  • Page 189 : Constant speed compressor Service valve : Linear Expansion Valve Check valve : Oil Separator Strainer Accum. : Accumulator Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 189 - Only for training and service purposes...
  • Page 190 : Constant speed compressor Service valve : Linear Expansion Valve Check valve : Oil Separator Strainer Accum. : Accumulator Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 190 - Only for training and service purposes...
  • Page 191 : Constant speed compressor Service valve : Linear Expansion Valve Check valve : Oil Separator Strainer Accum. : Accumulator Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 191 - Only for training and service purposes...
  • Page 192 Wiring Diagrams 5. Wiring Diagrams 5.1 Main Outdoor Unit +CN2 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 192 - Only for training and service purposes...
  • Page 193 Wiring Diagrams 5.2 Sub Outdoor Unit Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 193 - Only for training and service purposes...
  • Page 194 LINEAR EXPANSION VALVE(MAIN) CN24 DRY CONTACT OPERATING MODE LOCKING(COOL, HOT ,GENERAL) CN34 DRY CONTACT OPERATING MODE LOCKING(COOL, HOT ,GENERAL) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 194 - Only for training and service purposes...
  • Page 195 HIGH PRESSURE SENSOR CN30 P-SEN(L) LOW PRESSURE SENSOR JIG1 JIG POWER JIG2 JIG POWER CN31 EEV-OUT-1 LINEAR EXPANSION VALVE(MAIN) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 195 - Only for training and service purposes...
  • Page 196 4. Other control .........................213 4.1 Initial setup .......................214 4.2 Instant indoor unit checking mode ................217 4.3 Emergency operation ....................218 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 196 - Only for training and service purposes...

  • Page 197: Basic Control

    *Stage means how many constant compressors operate Example) Stage 2: 2 constant compressors operate Stage 1: 1 constant compressor operate Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 197 - Only for training and service purposes...

  • Page 198: Main And Sub Unit's Eev Control

    1000pls, R410A : 800 pls) and discharge temperature is above 85°C in heating operation, subcooling EEV may control the "subcooling out temperature-evaporating temperature" to be some given difference. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...

  • Page 199: Fan Control

    • The sub unit has two tap motors and run in steps of stop , low and high . • The tap motor functioning is decided as per the frequency of the inverter motors of the main unit. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...

  • Page 200: Special Control

    Close pulse Close pulse pulse Oil return operation time : 3 min for running step Starting condition:every 6 hours operate Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 200 - Only for training and service purposes...

  • Page 201: Defrost Control

    Oil return operation time : 3 min for running step Min. frequency • temp. out > -5˚C: 30Hz temp. out -5˚C: 40Hz Starting condition:same as cooling mode Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 201 - Only for training and service purposes...
  • Page 202 45 Hz + 60 Hz + 60 Hz + 3 unit constant comp.1 constant comp.2 constant comp.2 constant comp.3 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 202 - Only for training and service purposes...
  • Page 203 Main EEV Full open Full open Base pulse 4 way valve Subcooling EEV min. min. min. Hot gas bypass valve Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 203 - Only for training and service purposes...

  • Page 204: Oil Equalizing Control

    Ending condition 1) About 4min after control begins Starting condition:every 2hours operation with constant compressors. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 204 - Only for training and service purposes...
  • Page 205 Ending condition 1) About 4min after control begins Starting condition:same as cooling mode Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 205 - Only for training and service purposes...
  • Page 206 Alternate equalizing operation runs only one compressor in turn for 2 min. • The skip conditions of oil equalizing operation. liquid injection on abnormally high pressure. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 206 - Only for training and service purposes...

  • Page 207: Stopping Operation

    After 15 min from stop, off Subcooling EEV Full close Full close Hot gas bypass After 15 min from stop, Off Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 207 - Only for training and service purposes...
  • Page 208 If liquid injection on : Subcooling control(cooling) max. pulse is 350 Subcooling EEV min. pulse(heating) else : 300 pulse Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 208 - Only for training and service purposes...

  • Page 209: Protection Control

    -5 Hz/2sec. -10Hz/2sec. before 1min Frequency Ps ≤ 242 kPa Normal control holding Ps ≥ 399 kPa Normal control Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 209 - Only for training and service purposes...
  • Page 210 1min Ps ≤ 242 kPa Frequency Normal control holding Ps ≤ 268kPa Normal control Ps ≥ 307 kPa Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 210 - Only for training and service purposes...

  • Page 211: Discharge Temperature Control

    < Current Inv. Compressor normal control DC Peak System stop High pressure switch System stop Low voltage System stop Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 211 - Only for training and service purposes...

  • Page 212: Liquid Back Control

    Tdis > Tc + 18 ˚C Normal operation The logic starts after 9 min. on heating mode and 4 min. on cooling mode from the compressor running. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 212 -...

  • Page 213: Phase Detection

    - The state of pressure sensing switch is normally on. It has small electric current from 220V AC. Never touch the connecting terminal with hand nor short two wires directly. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...

  • Page 214: Other Control

    Heat pump : Display 2 is default value ( normal) Cooling only : no display Factory setting(25 is normal) ( normal) Refrigerant display Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 214 - Only for training and service purposes...
  • Page 215 10 HP 12 HP 14 HP led4 led3 led6 led5 Sub1 Sub2 led8 led7 Comp. 2 Comp. 1 normal Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 215 - Only for training and service purposes...
  • Page 216 Every indoor unit displays its address on wired remote controller and the 7 segment of main PCB is off. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 216 - Only for training and service purposes...

  • Page 217: Instant Indoor Unit Checking Mode

    Red button pushed : Next indoor unit At last indoor unit, Red button pushed : Return to 1 unit Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 217 - Only for training and service purposes...

  • Page 218: Emergency Operation

    1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 C4 and C5 fail Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 218 - Only for training and service purposes...

  • Page 219: Pcb Setting And Test Run

    Part 4 PCB Setting and Test Run Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 219 - Only for training and service purposes...

  • Page 220: Test Run

    • Start preheat operation for 3 hours after supplying main power. • Be sure to supply power 6 hours before operation so that the heater is heated (Insufficient heating may cause damage of the compressor.) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 220 -...
  • Page 221 When system fault occurs, the error code is displayed at indoor unit display or remote control display, the trou- ble shooting guide is in the service manual Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 221 -...
  • Page 222 Main PCB 7 Segments (Shows setting status) SW03M (DIP switch) Sub Unit PCB (Shows setting status) SW03M (DIP switch) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 222 - Only for training and service purposes...
  • Page 223 Product may not properly operate if the relevant DIP switch is not properly setup. Model Code Model Code Unit (HP) Unit Ref. Model Code Unit (HP) Unit Ref. R410A MAIN 410A Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 223 - Only for training and service purposes...
  • Page 224 #2 off during the instant indoor data checking mode, the mode is ended. After that, restore the address dip switch setting. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 224 - Only for training and service purposes...
  • Page 225 In case of inverter failure, backup operation is possible when 110k(Series) or more Indoor units capacity is ON.(1unit:70k or more) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 225 - Only for training and service purposes...
  • Page 226 6) Backup operation: unit backup Setting before applying the power Set at the disabled unit.(All compressors are broken) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 226 - Only for training and service purposes...

  • Page 227: Replacement Procedure

    Replacement procedure for Compressor(ARUN508T1 To ARUN4008T1) 1. Replacement procedure for Compressor.......228 1.1 Replacement procedure............228 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 227 - Only for training and service purposes...
  • Page 228 13) Charge refrigerant after the completion of vacuum drying, and check the function of compressor with cooling or heating operation. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 228 - Only for training and service purposes...

  • Page 229: Trouble Shooting Guide

    Part 5 Trouble shooting guide Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 229 - Only for training and service purposes...
  • Page 230 Trouble Shooting guide 1. The phenomena from main component failure .....231 2. Checking Method for key components........232 3. Selt-diagnosis function............240 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 230 - Only for training and service purposes...
  • Page 231 When system fault occurs, the error code is displayed at indoor unit display or remote control display, the trou- ble shooting guide is in the service manual Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 231 -...
  • Page 232 ) if using commercial frequency tester when measuring output values of the inverter (when measuring absolute values). Accurate measuring values cannot be obtained with a gen- eral movable tester (For analog and digital mode). Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 232 -...
  • Page 233 3. If problems continue to occur even after counter- measure of No.1 and No.2, it means that both boards has defect. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 233 - Only for training and service purposes...
  • Page 234 Full open from EEV. open 1350 pulses - If liquid refrigerant is in EEV, the noise is lower. pulse Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 234 - Only for training and service purposes...
  • Page 235 When the coil part is removed or assembled, be careful not to bend the pipe of the body. A part Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 235 - Only for training and service purposes...
  • Page 236 If estimated temperature is very low in comparison with suction temperature which is displayed at remote controller then the valve is not fully closed Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 236 - Only for training and service purposes...
  • Page 237 LED 01Y (in inverter board, refer to page 172) turned off (wait 3 minutes after main power OFF), otherwise it may cause electrical shock. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 238 LED 01Y (in inverter board, refer to page 172) turned off (wait 3 minutes after main power OFF), otherwise it may cause electrical shock. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 239 Caution it should be checked that the LED 01Y turned off (wait 3 minutes after main power OFF), otherwise it may cause electrical shock. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 239 - Only for training and service purposes...
  • Page 240 Low pressure of main outdoor unit System is off by excessive decrease of low pressure of main outdoor unit Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 240 - Only for training and service purposes...
  • Page 241 Overheat of inverter heatsink Overheat of inverter heatsink Temperature sensor of fan Temperature sensor of fan is open or short Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 241 - Only for training and service purposes...
  • Page 242 Temperature sensor of front-side heat exchanger of sub1 Temperature sensor of front-side heat exchanger of sub1 outdoor unit unit is open or short Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 242 - Only for training and service purposes...
  • Page 243 Low/high voltage of sub1 outdoor Input voltage of sub1 outdoor unit is more than 487V or unit less than 270V Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 243 - Only for training and service purposes...
  • Page 244 Liquid pipe sensor of HR unit 7 Liquid pipe sensor of HR unit 7 is open or short Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 244 - Only for training and service purposes...
  • Page 245 In case that the control box is opened and before checking electrical parts, it should be checked that the LED 01Y turned off (wait 3 minutes after main power OFF), otherwise, it may cause electrical shock. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 245 -...

  • Page 246: Troubleshooting Guide

    CN-PIPE2 : Pipe outlet temp sensor CN-PIPE1 : Pipe inlet temp sensor Measure the resistance of outlet pipe temp sensor. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 246 - Only for training and service purposes...
  • Page 247 CN-REMO : Remote controller connection The PCB can differ from model to model. Check from the right source. Checking transmission cable connection status Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 247 - Only for training and service purposes...
  • Page 248 * If the float goes up higher than a half of float switch then the circuit is open & the unit is stopped automatically. float (High position Condensate water Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 248 - Only for training and service purposes...
  • Page 249 (Marked as CN-DPUMP) Float switch connector Float switch Housing (CN-FLOAT) [***] Standard of drain pipe head height / slope MAX 450 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 249 - Only for training and service purposes...
  • Page 250 (-9V~+9V) then transmission from indoor unit is normal transmission from outdoor unit is normal Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 250 - Only for training and service purposes...
  • Page 251 Error diagnosis and countermeasure flow chart - Replace the indoor unit PCB, and then make sure to do Auto addressing and input the address of central control Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 251 -...
  • Page 252 (Notice: The connection of motor connector to PCB should be done under no power supplying to PCB) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 252 - Only for training and service purposes...
  • Page 253 After ODU main PCB After Auto addressing, Replace indoor unit 485 reset, error code error code disappears? transmission PCB disappears? Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 253 - Only for training and service purposes...
  • Page 254 Replace Magnetic switch Normal? Check main power and installation condition * Check the soldering state of IPM SUB PCB Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 254 - Only for training and service purposes...
  • Page 255 (heating) / outdoor (cooling) or not * measure the current passing through CT by clamp meter Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 255 - Only for training and service purposes...
  • Page 256 2 terminal as below is more than 270V Check whether all the connections and terminals is normal and reconnect Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 256 - Only for training and service purposes...
  • Page 257 LGMV similar as Replace high pressure sensor at manifold gauge? Check pipe is blocked or not and take measure Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 257 - Only for training and service purposes...
  • Page 258 * Connector location of high pressure switch at PCB Inverter compressor PCB SUB outdoor unit PCB ** Checking short or not at connector of high pressure switch Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 258 - Only for training and service purposes...
  • Page 259 Check input power from building PCB (T-N) 190V~250V ?* is supplied correctly or not Replace main PCB * Check voltage at outdoor T/Block(220V) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 259 - Only for training and service purposes...
  • Page 260 Check another components Is there pipe and operation conditions (strainer etc.) clogging? / Take measures Replace strainer Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 260 - Only for training and service purposes...
  • Page 261 Replace sensor of high pressure value(Is it high actually)? Check indoor unit LEV Check indoor unit PCB Check in/outdoor installation condition Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 261 - Only for training and service purposes...
  • Page 262 (Notice: it is not full ice forming of strainer, in case that there is installation conditions not at inlet portion but at outlet portion) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 262 - Only for training and service purposes...
  • Page 263 2A?* Check connection state of R phase cable and reconnect * Measure the R phase current with clamp meter Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 263 - Only for training and service purposes...
  • Page 264 10°C = 362kΩ : 25°C= 200kΩ : 50°C= 82kΩ : 100°C= 18.5kΩ Check the resistance Check the resistance inverter compressor of constant compressor discharge temperature discharge temperature sensor sensor Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 264 - Only for training and service purposes...
  • Page 265 PCB pressure sensor is the system normal? High pressure sensor Low pressure Pressure sensor connection sensor on main PCB Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 265 - Only for training and service purposes...
  • Page 266 Abnormal value of exchanger in main Refer to CH45 sensor (Open/Short) (Heat exchanger B) & sub outdoor unit heat exchanger (B) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 266 - Only for training and service purposes...
  • Page 267 * In order to check transmission cables between outdoor units, check in order as below : PCB connectors terminal block transmission cables Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 267 - Only for training and service purposes...
  • Page 268 * The method of checking MAIN PCB and inverter compressor PCB (If normal, transmission LED blinks) Transmission connector & LED in MAIN PCB Transmission connector & LED in inverter compressor PCB Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 268 -...
  • Page 269 * After replacement of indoor unit PCB, Auto Addressing should be done, if central controller is installed then the central control address also should be input. In case that only transmission PCB is replaced above process is not needed Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 269 -...
  • Page 270 ** Check power cable connection state, phase order, power phase (R-S-T) order, power supply state supply state in distribution panel in control box of product Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 270 - Only for training and service purposes...
  • Page 271 Heat sink cooling fan drive connector in main PCB Heat sink temperature sensor connection Check DC 12V output during inverter compressor operation Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 271 - Only for training and service purposes...
  • Page 272 Heat sink sensor(±5% tolerance) : 10°C = 20.0KΩ : 25°C= 10.0KΩ : 50°C= 3.5KΩ : 85°C= 1.0KΩ Temperature sensor location of Heat sink Measure the resistance of heat sink temperature sensor Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 272 -...
  • Page 273 Replace related SUB PCB Is transmission cables of outdoors connected Re-connect transmission cables correctly? [refer electric component part] Replace MAIN PCB Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 273 - Only for training and service purposes...
  • Page 274 ** Location of inverter transmission connector of *Location of PCB transmission connector of Main PCB and LED Inverter FAN and LED Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 274 - Only for training and service purposes...
  • Page 275 * The dashed line(---) in above flow chart is only applicable for Multi V Space ** position of inverter fan motor connector Inverter fan main PCB Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 275 -...
  • Page 276 Replace inverter fan PCB * Location of fan DC link connector Inverter fan main PCB Inverter fan IPM PCB Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 276 - Only for training and service purposes...
  • Page 277 Refer to CH104 outdoor units (Sub1) 147, 149, 171 Sub outdoor units are not receiving signal from Main outdoor unit Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 277 - Only for training and service purposes...
  • Page 278 Air temperature sensor: 10°C = 20.7kΩ : 25°C = 10kΩ : 50°C= 3.4kΩ Pipe temperature sensor: 10°C = 10kΩ : 25°C = 5kΩ : 50°C= 1.8kΩ Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 278 -...
  • Page 279 Sensor measured value of resis- Outdoor liquid pipe (con- Refer to CH113 tance is abnormal (Open/Short) (Sub1) denser) sensor error Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 279 - Only for training and service purposes...
  • Page 280 Sensor measured value is abnor- Refer to CH45 exchanger (A,B) pipe mal (Open/Short) temperature sensor error (Sub2 HEX B) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 280 - Only for training and service purposes...
  • Page 281 Error Point Main Reasons 148 (Sub1) Outdoor voltage sensing Measured value is abnormal (Open/Short) Refer to CH49 error 150 (Sub2) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 281 - Only for training and service purposes...
  • Page 282 If the same error is occurred in mode, is the same error near future replace 4way valve occurred again? Replace 4 way valve***** Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 282 - Only for training and service purposes...
  • Page 283 LGMV for each unit (Main, Sub1, Sub2) If there is a unit in which the difference is not increased then the 4way valve of that unit is defective Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 283 -...
  • Page 284 Compressor suction tempera- Abnormal resistance value of sensor Refer to CH46 161(Sub3) ture error measurement ( Open / Short ) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 284 - Only for training and service purposes...
  • Page 285 = 3phase Excessive Low voltage / Refer to CH25 171(Sub3) 380V±10% High voltage 2. Single phase = 220V ±10% Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 285 - Only for training and service purposes...
  • Page 286 Is outdoor air temperature temperature sensor sensor normal? Replace outdoor unit PCB * cables connection between constant compressor and magnetic switch Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 286 - Only for training and service purposes...
  • Page 287 [NB] How to check display method of outdoor Main PCB 7-segment ?: '88' Indoor qty which check thru 'Auto-Addressing' '88' Indoor qty which check thru ‘piping checking' Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 287 - Only for training and service purposes...
  • Page 288 Retry auto-addressing after checking trouble equal? Incompletion of auto-addressing End of auto-addressing Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 288 - Only for training and service purposes...
  • Page 289 Try manual addressing after checking and confirming there is no error. End of manual addressing Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 289 - Only for training and service purposes...
  • Page 290 - The valve that is not connected with any indoor unit should be addressed with any other number than used address numbers of the valves connected with indoor units. (The valves does not work if the address numbers are same.) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 290 -...
  • Page 291 1) Selection of the method for addressing valves of an HR unit (Auto/Manual) Switch No.1 Off Switch No.1 On Manual Auto Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 291 - Only for training and service purposes...
  • Page 292 Indoor unit Large indoor unit Indoor unit Notice: If you installed by valve grouping you need to use manual addressing. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 292 - Only for training and service purposes...
  • Page 293 - Piping temperature sensor : 10°C = 10kΩ : 25°C= 5kΩ : 50°C= 1.8kΩ 3) If connection of sensor and value is correct, replace outdoor unit PCB Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 293 -...
  • Page 294 [NB] If Indoor units/transmission cables of HR unit and cables of power 220V has been changed each other, transmission parts and indoor will be burnt HR Unit PCB Green LED blinking: transmission is normal Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 294 - Only for training and service purposes...
  • Page 295 1. CNU defect Central controller Receive tral controller from CNU with- 2. Initialization failure of central controller Timeout in designated time Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 295 - Only for training and service purposes...
  • Page 296 1) Check system setting address of central controller and actual address is matched or not 2) Re-start service program(engine) of central controller 3) Replace CNU Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 296 -...

  • Page 297: Exploded View & Replacement Parts List

    Part 6 Exploded view & Replacement parts list Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 297 - Only for training and service purposes...
  • Page 298 261704B W0FZZB 268711H 268711D W6631B W6631A W6640C W6640B COMP COMP 566001A W6640A 268711G 649950A 649950B 566001B W6200 268711J 261704D Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 298 - Only for training and service purposes...
  • Page 299 Exploded View Sub Unit 566001 W0CZZA 566001 W6640B W6631B W6640C W6631A COMP COMP 649950B 268711H 261704D Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 299 - Only for training and service purposes...
  • Page 300 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 300 - Only for training and service purposes...
  • Page 301 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 301 - Only for training and service purposes...
  • Page 302 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 302 - Only for training and service purposes...

  • Page 303: Main Unit

    W0FZZB 268200 W6640C 261704A 566001 W0CZZB 268711C 261704B W6640A 261704D 649950B W6631C W6631A 268711J 268711D 268711H 268711G 649950A W6640A Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 303 - Only for training and service purposes...
  • Page 304 Exploded View Sub Unit 566001 W0CZZA 649950C 268711D W6640B 649950C W6640B 261704D W6640C Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 304 - Only for training and service purposes...
  • Page 305 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 305 - Only for training and service purposes...
  • Page 306 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 306 - Only for training and service purposes...
  • Page 307 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 307 - Only for training and service purposes...
  • Page 308 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 308 - Only for training and service purposes...
  • Page 309 Housing color : yellow THERMISTOR 2 263230B Eva. IN Housing color : white THERMISTOR 3 263230C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 309 - Only for training and service purposes...
  • Page 310 Housing color : yellow THERMISTOR 2 263230B Eva. IN Housing color : white THERMISTOR 3 263230C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 310 - Only for training and service purposes...
  • Page 311 Housing color : yellow THERMISTOR 2 263230B Eva. IN Housing color : white THERMISTOR 3 263230C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 311 - Only for training and service purposes...
  • Page 312 Housing color : yellow THERMISTOR 2 263230B Eva. IN Housing color : white THERMISTOR 3 263230C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 312 - Only for training and service purposes...
  • Page 313 Housing color : yellow THERMISTOR 2 263230B Eva. IN Housing color : white THERMISTOR 3 263230C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 313 - Only for training and service purposes...
  • Page 314 Housing color : yellow THERMISTOR 2 263230B Eva. IN Housing color : white THERMISTOR 3 263230C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 314 - Only for training and service purposes...
  • Page 315 Housing color : yellow THERMISTOR 2 263230B Eva. IN Housing color : white THERMISTOR 3 263230C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 315 - Only for training and service purposes...
  • Page 316 Housing color : yellow THERMISTOR 2 263230B Eva. IN Housing color : white THERMISTOR 3 263230C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 316 - Only for training and service purposes...
  • Page 317 Housing color : yellow THERMISTOR 2 263230B Eva. IN Housing color : white THERMISTOR 3 263230C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 317 - Only for training and service purposes...
  • Page 318 Housing color : yellow THERMISTOR 2 263230B Eva. IN Housing color : white THERMISTOR 3 263230C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 318 - Only for training and service purposes...
  • Page 319 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 319 - Only for training and service purposes...
  • Page 320 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 320 - Only for training and service purposes...
  • Page 321 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 321 - Only for training and service purposes...
  • Page 322 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 322 - Only for training and service purposes...
  • Page 323 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 323 - Only for training and service purposes...
  • Page 324 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 324 - Only for training and service purposes...
  • Page 325 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 325 - Only for training and service purposes...
  • Page 326 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 326 - Only for training and service purposes...
  • Page 327 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 327 - Only for training and service purposes...
  • Page 328 THERMISTOR 1 567480A Air + Eva. IN Housing color : white THERMISTOR 2 567480B Eva. OUT Housing color : red Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 328 - Only for training and service purposes...
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