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LG MULTI V SYNCII ARUB Series Service Manual
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LG MULTI V SYNCII ARUB Series Service Manual

LG MULTI V SYNCII ARUB Series Service Manual

System, r410a
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This Owner's Manual is provided and hosted by Appliance Factory Parts.
LG PRHR020
Owner's Manual
Shop genuine replacement parts for LG PRHR020
Find Your LG Air Conditioner Parts - Select From 2328 Models
-------- Manual continues below --------

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Summary of Contents for LG MULTI V SYNCII ARUB Series

  • Page 1 This Owner's Manual is provided and hosted by Appliance Factory Parts. LG PRHR020 Owner's Manual Shop genuine replacement parts for LG PRHR020 Find Your LG Air Conditioner Parts - Select From 2328 Models -------- Manual continues below --------...
  • Page 2 Internal Use Only http://biz.lgservice.com System Air Conditioner SERVICE MANUAL R410A (Exploded View) MODEL : ARUB Series CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.
  • Page 3 Part 5 PCB Setting & Test Run .......................223 Part 6 Trouble shooting guide ........................243 Part 7 Exploded View ..........................311 - 2 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 4 • There is risk of fire or electric shock. • Improper wiring or installation may cause fire or electric shock. - 3 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 LGE are used, fire or explosion may result. R410A R407C - 4 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 6 • There is risk of fire, electric shock, or product • There is risk of fire, electric shock, explosion, or damage. injury. - 5 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 • To avoid vibration or water leakage. • If the gas leaks and accumulates around the unit, an explosion may result. 90˚ - 6 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 • It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation. - 7 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 Also support the outdoor unit at four points so that it cannot slip sideways. - 8 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 • Be careful and avoid personal injury. • There are sharp and moving parts that could cause personal injury. - 9 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 • There is risk of property damage, failure of product, • Installation within cell such as meeting room or electric shock. etc, may disturb business due to noise. - 10 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 5. Outdoor Units Information..........18 6. HR Units Information.............19 6.1 HR Units..............19 6.2 Reducers for Indoor Units and HR Units....19 - 11 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 Heat Recovery ARUB 1.3 HR Unit Power supply 2 rooms 3 rooms 4 rooms 1Ø,220~240V,50/60 Hz PRHR020 PRHR030 PRHR040 - 12 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 Ceiling Suspended ARNU24GCFA1 ARNU18GVJA1 Without case ARNU24GVJA1 ARNU07GCEU1 ARNU09GCEU1 ARNU12GCEU1 ARNU18GCFU1 ARNU24GCFU1 These are model names of the basic function. - 13 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 26, 28, 30, 32, 34, 36, 38, 40HP 2.3 HR Unit PRHR020 PRHR030 PRHR040 (For 2 rooms) (For 3 rooms) (For 4 rooms) - 14 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 34HP 36HP 38HP 40HP I Up to a maximum 40HP are realized by combining 8, 10, 12 and 14HP - 15 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 B: Inverter and Heat Recovery S: Heat Recovery (Sub Unit) Indicates that this is System Outdoor Unit using the R410A - 16 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 03 : For 3 Rooms 04 : For 4 Rooms Indicates that this is System HR Unit using the R410A - 17 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 ) Ø41.3(1 High Pressure Gas Pipes[mm(inch)] Ø28.58(1 ) Ø28.58(1 ) Ø28.58(1 ) Ø28.58(1 ) Ø28.58(1 ) Ø34.9(1 ) Ø34.9(1 - 18 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 OD15.88 Ø12.7 HR unit reducer PRHR030 OD22.2 Ø19.05 Ø15.88 OD28.58 Ø22.22 Ø19.05 PRHR040 OD12.7 Ø9.52 OD19.05 Ø15.88 OD15.88 Ø12.7 - 19 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 - 20 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 Low Static ................99 Built In ................109 High Static..............119 Wall Mounted(General) Wall Mounted ..............131 Convertible Convertible..............145 Floor Standing Floor Standing..............157 - 21 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 - 22 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 1. Specifications ................24 2. Functions ..................25 3. Operation Details................26 4. Dimensions .................29 5. Piping Diagrams .................30 6. Wiring Diagrams .................31 - 23 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 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 - 24 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 Central Control(Optional) • It is operating cooling and heating mode automatically accord- Auto Change Over ing to setting temperature. - 25 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 (SET TEMPERATURE -0.5°C) More than More than 3 minutes 3 minutes Selected Selected Selected INDOOR FAN Speed Speed Speed - 26 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 To be selected lower temperature (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. mode ST+0 ST+2 - 27 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 Thermal On Temperature for Cooling * Ts : Setting Temperature Thermal Off Temperature for Heating Thermal On Temperature for Heating - 28 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 Number Name Descripition Liquid pipe connection ø6.35 flare Gas pipe connection ø12.7 flare Air suction grill Air discharge grill - 29 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 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 - 30 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 PIPE THERMISTOR CN-PIPE/O DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR CN-ROOM ROOM SENSOR ROOM THERMISTOR CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE - 31 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 - 32 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 1. Specifications ................34 2. Functions ..................36 3. Operation Details................37 4. Dimensions .................40 5. Piping Diagrams .................41 6. Wiring Diagrams .................42 - 33 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 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 - 34 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 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 - 35 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 Central Control(Optional) • It is operating cooling and heating mode automatically accord- Auto Change Over ing to setting temperature. - 36 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38 (SET TEMPERATURE -0.5°C) More than More than 3 minutes 3 minutes Selected Selected Selected INDOOR FAN Speed Speed Speed - 37 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 To be selected lower temperature (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. mode ST+0 ST+2 - 38 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 40 * Tai : Indoor Temperature Thermal On Temperature for Cooling * Ts : Setting Temperature Thermal Off Temperature for Heating - 39 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 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 - 40 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 42 : 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) - 41 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43 PIPE THERMISTOR CN-PIPE2 DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR CN-ROOM ROOM SENSOR ROOM THERMISTOR CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE - 42 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 44 1. Specifications ................44 2. Functions ..................47 3. Operation Details................48 4. Dimensions .................51 5. Piping Diagrams .................53 6. Wiring Diagrams .................54 - 43 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 45 4. EEV : Electronic Expansion Valve 5. To be added for more available Models * A : Basic Model B : Plasma Model - 44 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 46 4. EEV : Electronic Expansion Valve 5. To be added for more available Models * A : Basic Model B : Plasma Model - 45 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 47 4. EEV : Electronic Expansion Valve 5. To be added for more available Models * A : Basic Model B : Plasma Model - 46 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 48 • It is operating swirl swing • It is operating cooling and heating mode automatically Auto Change Over according to setting temperature. - 47 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 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 - 48 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50 To be selected lower temperature (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. mode ST+0 ST+2 - 49 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51 * Tai : Indoor Temperature Thermal On Temperature for Cooling * Ts : Setting Temperature Thermal Off Temperature for Heating - 50 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 52 Gas pipe connection Unit size(9k, 12k, 18k):Ø12.7 Drain pipe connection Power supply connection Air discharge grill Air suction grill - 51 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 Gas pipe connection Unit Size(24k, 28k, 36k, 42k, 48k):Ø15.88 Drain pipe connection Power supply connection Air discharge grill Air suction grill - 52 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 54 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) - 53 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 55 PIPE THERMISTOR CN-PIPE2 DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR CN-ROOM ROOM SENSOR ROOM THERMISTOR CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE - 54 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 56 1. Specification ................56 2. Functions ..................57 3. Operation Details................58 4. Dimensions .................65 5. Piping Diagrams .................66 6. Wiring Diagrams .................67 - 55 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 57 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 - 56 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 58 Auto Change Over up and down automatically. • It is operating cooling and heating mode automatically according to setting tempera- ture. - 57 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 59 • 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. - 58 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 60 • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. - 59 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 61 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 - 60 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 62 • 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. - 61 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 63 • Operation Mode that is kept on the memory - State of Operation ON/OFF - 62 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 64 "beep-beep-beep-beep-beep-" is made 10 times to indicate that the remote control signal cannot be received. - 63 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 65 * Tai : Indoor Temperature Thermal On Temperature for Cooling * Ts : Setting Temperature Thermal Off Temperature for Heating - 64 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 66 Liquid 7, 9, 12k Ø12.7 Ø6.35 More than 50cm More than 50cm More than 1.5m Model ARNU07GSP*1 ARNU09GSP*1 ARNU12GSP*1 - 65 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 67 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) - 66 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 68 STEP MOTOR STEP MOTOR OUTPUT CN-TH1 ROOM/PIPE SENSOR ROOM AND PIPE THERMISTOR CN-TH2 DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR - 67 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 69 - 68 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 70 1. Specifications ................70 2. Functions ..................71 3. Operation Details................72 4. Dimensions .................79 5. Piping Diagrams .................80 6. Wiring Diagrams .................81 - 69 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 71 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 - 70 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 72 Auto Change Over It is operating cooling and heating mode automatically according to setting tempera- ture. - 71 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 73 • 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. - 72 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 74 • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. - 73 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 75 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 - 74 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 76 • 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. - 75 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 77 • Operation Mode that is kept on the memory - 76 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 78 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. - 77 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 79 * Tai : Indoor Temperature Thermal On Temperature for Cooling * Ts : Setting Temperature Thermal Off Temperature for Heating - 78 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 80 Pipe Hole More than 20cm More than More than 50cm 50cm More than 1.5m 60mm 60mm (Unit: mm) Model ARNU18GSV*1 - 79 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 81 : 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) - 80 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 82 STEP MOTOR STEP MOTOR OUTPUT CN-TH1 ROOM/PIPE SENSOR ROOM AND PIPE THERMISTOR CN-TH2 DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR - 81 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 83 - 82 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 84 1. Specifications ................84 2. Functions ..................86 3. Operation Details................87 4. Dimensions .................94 5. Piping Diagrams .................95 6. Wiring Diagrams .................96 - 83 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 85 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 - 84 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 86 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 - 85 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 87 • The louver can be set at the desired position or swing up and down automatically. • It is operating cooling and heating mode automatically according to setting tempera- ture. - 86 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 88 • 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. - 87 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 89 • While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper- ature - 88 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 90 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 - 89 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 91 • 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. - 90 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 92 • Operation Mode that is kept on the memory - 91 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 93 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. - 92 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 94 Thermal On Temperature for Cooling * Ts : Setting Temperature Thermal Off Temperature for Heating Thermal On Temperature for Heating - 93 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 95 ARNU09GSE*1 ARNU12GSE*1 More than 1030 More than 2.3m (unit : mm) 1030 Model ARNU07GSE*1 ARNU09GSE*1 ARNU12GSE*1 ARNU18GS3*1 1170 ARNU24GS3*1 - 94 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 96 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) - 95 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 97 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 - 96 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 98 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 - 97 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 99 - 98 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 100 1. Specifications ................100 2. Funtions ..................102 3. Operation Details..............103 4. Dimensions ................106 5. Piping Diagrams ...............107 6. Wiring Diagrams ...............108 - 99 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 101 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 - 100 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 102 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 - 101 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 103 • It is operating individually or totally by central control function. Central Control(Optional) • It is operating cooling and heating mode automatically Auto Change Over according to setting temperature. - 102 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 104 More than More than 3 minutes 3 minutes Selecting Selecting Selecting INDOOR FAN fan speed fan speed fan speed Thermal - 103 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 105 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 - 104 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 106 Thermal On Temperature for Cooling * Ts : Setting Temperature Thermal Off Temperature for Heating Thermal On Temperature for Heating - 105 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 107 (unit: mm) H=20 or more ❉ Suitable dimension "H" is necessary to get a slope to drain as figure Front - 106 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 108 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) - 107 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 109 DRAIN PUMP OUTPUT AC OUTPUT FOR DRAIN PUMP CN-POWER AC POWER SUPPLY AC POWER LINE INPUT FOR INDOOR CONTROLLER - 108 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 110 1. Specifications ................110 2. Funtions ..................112 3. Operation Details..............113 4. Dimensions ................116 5. Piping Diagrams ...............117 6. Wiring Diagrams ...............118 - 109 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 111 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 - 110 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 112 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 - 111 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 113 Central Control(Optional) • It is operating cooling and heating mode automatically accord- Auto Change Over ing to setting temperature. - 112 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 114 More than More than 3 minutes 3 minutes Selecting Selecting Selecting INDOOR FAN fan speed fan speed fan speed Thermal - 113 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 115 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 - 114 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 116 Thermal On Temperature for Cooling * Ts : Setting Temperature Thermal Off Temperature for Heating Thermal On Temperature for Heating - 115 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 117 Control box ❉ Suitable dimension "H" is necessary to get a slope to drain as given in the figure - 116 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 118 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) - 117 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 119 DRAIN PUMP OUTPUT AC OUTPUT FOR DRAIN PUMP CN-POWER AC POWER SUPPLY AC POWER LINE INPUT FOR INDOOR CONTROLLER - 118 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 120 1. Specifications ................120 2. Funtions ..................122 3. Operation Details..............123 4. Dimensions ................126 5. Piping Diagrams ...............127 6. Wiring Diagrams ...............128 - 119 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 121 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 - 120 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 122 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 - 121 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 123 Central Control(Optional) • It is operating cooling and heating mode automatically accord- Auto Change Over ing to setting temperature. - 122 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 124 More than More than 3 minutes 3 minutes Selecting Selecting Selecting INDOOR FAN fan speed fan speed fan speed Thermal - 123 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 125 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 - 124 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 126 Thermal On Temperature for Cooling * Ts : Setting Temperature Thermal Off Temperature for Heating Thermal On Temperature for Heating - 125 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 127 (unit: mm) (600X600) Control box ❈ Suitable dimension "H" is necessary to get a slope to drain as figure. Front - 126 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 128 LIQUID 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) - 127 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 129 PIPE THERMISTOR CN-PIPE/O DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR CN-ROOM ROOM SENSOR ROOM THERMISTOR CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE - 128 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 130 DISCHARGE PIPE THERMISTOR CN-ROOM ROOM SENSOR ROOM THERMISTOR CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE CN-INFANSUB STARTING SIGNAL CONTROL STARTING SIGNAL CONTROL - 129 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 131 - 130 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 132 1. Specifications ................132 2. Functions ..................134 3. Operation Details..............135 4. Dimensions ................142 5. Piping Diagrams ...............143 6. Wiring Diagrams ...............144 - 131 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 133 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 - 132 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 134 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 - 133 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 135 Auto Change Over up and down automatically. • It is operating cooling and heating mode automatically according to setting tempera- ture. - 134 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 136 • 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. - 135 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 137 • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. - 136 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 138 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 - 137 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 139 • 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. - 138 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 140 • Operation Mode that is kept on the memory - State of Operation ON/OFF - 139 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 141 "beep-beep-beep-beep-beep-" is made 10 times to indicate that the remote control signal cannot be received. - 140 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 142 Thermal On Temperature for Cooling * Ts : Setting Temperature Thermal Off Temperature for Heating Thermal On Temperature for Heating - 141 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 143 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 - 142 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 144 [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) - 143 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 145 CN-EEV EEV OUTPUT EEV CONTROL OUTPUT CN-U/D STEP MOTOR STEP MOTOR OUTPUT CN-TH1 ROOM/PIPE SENSOR ROOM AND PIPE THERMISTOR - 144 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 146 1. Specifications ................146 2. Functions ..................148 3. Operation Details..............149 4. Dimensions ................152 5. Piping Diagrams ...............154 6. Wiring Diagrams ...............155 - 145 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 147 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 - 146 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 148 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 - 147 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 149 • It is operating individually or totally by central control function. Central Control(Optional) • It is operating cooling and heating mode automatically Auto Change Over according to setting temperature. - 148 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 150 More than More than 3 minutes 3 minutes Selecting Selecting Selecting INDOOR FAN fan speed fan speed fan speed Thermal - 149 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 151 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 - 150 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 152 Thermal On Temperature for Cooling * Ts : Setting Temperature Thermal Off Temperature for Heating Thermal On Temperature for Heating - 151 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 153 200 Left rear piping Right rear piping (Ø45) Foor Suspension bolts Spring washer Hangen Max. Washer 12mm - 152 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 154 Signal Receptor Cover washer Hangen Air Filter Max. Washer 12mm Left Side DIM. Cover MODEL Inlet Grill Drain hose - 153 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 155 : 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) - 154 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 156 DRAIN PUMP OUTPUT AC OUTPUT FOR DRAIN PUMP CN-POWER AC POWER SUPPLY AC POWER LINE INPUT FOR INDOOR CONTROLLER - 155 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 157 - 156 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 158 1. Specifications ................158 2. Functions ..................160 3. Operation Details..............161 4. Dimensions ................164 5. Piping Diagrams ...............165 6. Wiring Diagrams ...............166 - 157 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 159 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 - 158 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 160 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 - 159 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 161 • It is operating individually or totally by central control function. Central Control(Optional) • It is operating cooling and heating mode automatically Auto Change Over according to setting temperature. - 160 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 162 More than More than 3 minutes 3 minutes Selecting Selecting Selecting INDOOR FAN fan speed fan speed fan speed Thermal - 161 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 163 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 - 162 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 164 Thermal On Temperature for Cooling * Ts : Setting Temperature Thermal Off Temperature for Heating Thermal On Temperature for Heating - 163 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 165 ARNU12GCEU1 ARNU18GCFA1 1,345 ARNU18GCFU1 1,256 ARNU24GCFA1 1,345 ARNU24GCFU1 1,256 Air Outlet Air Filter Air Inlet With Case Without Case - 164 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 166 : 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) - 165 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 167 PIPE THERMISTOR CN-PIPE/O DISCHARGE PIPE SENSOR DISCHARGE PIPE THERMISTOR CN-ROOM ROOM SENSOR ROOM THERMISTOR CN-REMO REMOTE CONTROLLER REMOTE CONTROL LINE - 166 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 168 Part 3 Outdoor Units - 167 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 169 1. Specifications ................169 2. Parts Function/Layout Drawing..........174 3. Dimensions ................178 4. Piping Diagrams ...............181 5. Wiring Diagrams ...............186 6. Functions ..................190 - 168 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 170 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve - 169 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 171 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve - 170 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 172 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve - 171 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 173 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve - 172 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 174 3. Due to our policy of innovation some specifications may be changed without notification 4. EEV : Electronic Expansion Valve - 173 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 175 Used for controlling flow quantity Of refrigerant in simultaneous operation mode Check solenoid Valve CSOL (Cooling oriented operation) - 174 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 176 Thermistor (Constant speed Hot Gas compressor Bypass discharge valve(HGV) pipe) Low Pressure Discharge Check High Pressure Sensor(LPS) Valve(DCHK) Sensor(HPS) - 175 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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) - 176 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 178 Gas Tube Valve Gas Tube Service Service Valve Mount Service Valve Valve Separator Excessive Cold Heat Exchanger Strainer Base Pan - 177 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 179 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) - 178 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 180 4. The Units should be installed to leave sufficient space in front for the on site refrigerant piping work to be carried out comfortably. - 179 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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. - 180 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 182 Piping Diagrams 4. Piping Diagrams 4.1 Refrigerant Flow for Each Operation Mode 4.1.1 Cooling Operation - 181 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 183 Piping Diagrams 4.1.2 Heating Operation - 182 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 184 Piping Diagrams 4.1.3 Oil Return/Defrost Operation - 183 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 185 Pressure switch Accum Comp Comp Check valve Liquid Injection Sensor Solenoid Drier SC Unit Service Valve Strainer Outdoor unit - 184 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 186 Pressure switch Accum Comp Comp Check valve Liquid Injection Sensor Solenoid Drier SC Unit Service Valve Strainer Outdoor unit - 185 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 187 Wiring Diagrams 5. Wiring Diagrams Main Outdoor Unit - 186 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 188 Wiring Diagrams Sub Outdoor Unit - 187 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 189 ELECTRONIC EXPANSION VALVE(MAIN) CN24 DRY CONTACT OPERATING MODE LOCKING(COOL, HOT ,GENERAL) CN34 DRY CONTACT OPERATING MODE LOCKING(COOL, HOT ,GENERAL) - 188 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 190 SUBCOOLING CIRCUIT LIQUID PIPE THERMISTOR CN29 P-SEN(H) HIGH PRESSURE SENSOR CN30 P-SEN(L) LOW PRESSURE SENSOR JIG1 JIG POWER JIG2 JIG POWER - 189 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 191 4. Other control .........................208 4.1 Initial setup .......................208 4.2 Instant indoor unit checking mode ................211 4.3 Emergency operation ....................212 - 190 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 192 *Stage means how many constant compressors operate Example) Stage 2: 2 constant compressors operate Stage 1: 1 constant compressor operate - 191 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 193 The degree of Subcool = Tcondensation - Tliquid Tliquid : temperature at outlet of subcooler(°C) Tcondensation : condensation temperature equivalent to high pressure(°C) - 192 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 194 • The tap motor functioning is decided as per the frequency of the inverter motors of the main unit. - 193 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 195 Const Comp3 I Oil return operation time : 3 min for running step I Starting condition:every 6 hours operate - 194 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 196 I Min. frequency • temp. out > -5˚C: 30Hz temp. out -5˚C: 40Hz I Starting condition:same as cooling mode - 195 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 197 Pressure range Compressor combination Ps ≤ 229 kpa Refer to combination table1 Ps ≥ 242 kpa Refer to combination table1 - 196 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 198 Return to pulse pulse base pulse Thermo off unit Oil return operation Heating close pulse Heating close pulse pulse - 197 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 199 I Ending condition 1) About 4min after control begins I Starting condition:every 2hours operation with constant compressors. - 198 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 200 I Ending condition 1) About 4min after control begins I Starting condition:same as cooling mode - 199 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 201 ❇ Alternate equalizing operation runs only one compressor in turn for 2 min. • The skip conditions of oil equalizing operation. liquid injection on Abnormal high pressure - 200 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 202 Subcooling EEV Full open After 15 min from stop, min. Hot gas bypass After 15 min from stop, Off - 201 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 203 4 way valve Same state to main unit Hot gas bypass Normally Off Subcooling control(cooling) Subcooling EEV min. pulse(heating) - 202 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 204 -5 Hz/2sec. -10Hz/2sec. before 1min Frequency Ps ≤ 242 kPa Normal control holding Ps ≥ 399 kPa Normal control - 203 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 205 1min Ps ≤ 242 kPa Frequency Normal control holding Ps ≤ 268kPa Normal control Ps ≥ 307 kPa - 204 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 206 < Current Inv. Compressor normal control DC Peak System stop High pressure switch System stop Low voltage System stop - 205 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 207 ❇ The logic starts after 9 min. on heating mode and 4 min. on cooling mode from the compressor running. - 206 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 208 - 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. - 207 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 209 Heat pump : Display 2 is default value ( normal) Cooling only : no display Factory setting(25 is normal) ( normal) Refrigerant display - 208 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 210 10 HP 12 HP 14 HP led4 led3 led6 led5 Sub1 Sub2 led8 led7 Comp. 2 Comp. 1 normal - 209 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 211 - If electric phase is reversed or missed, LED6 is on. - Other LED' except LED1 must be off in initial setup steps. - 210 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 212 Red button pushed : Next indoor unit At last indoor unit, Red button pushed : Return to 1 unit - 211 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 213 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 C4 and C5 fail - 212 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 214 Part 4 HR Units - 213 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 215 1. Specifications ................215 2. Parts Functions ................216 3. Dimensions ................217 4. Piping Diagrams ...............218 5. Wiring Diagrams ...............219 6. Functions ..................220 - 214 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 216 (Next lower standard fuse rating. Min. 15A) 4. Select wire size based on the MCA 5. Instead of fuse, use circuit. - 215 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 217 Subcooling EEV Balancing valve Gas pipe Liquid pipe 1 Liquid bypass valve Solenoid Assembly 1 Solenoid Assembly 2 Liquid pipe2 - 216 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 218 Dimensions Dimensions 3.1 HR Units PRHR020 PRHR030 PRHR040 - 217 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 219 : To prevent liquid charging between H/P gas valve and HR unit at cooling mode : To be controlled the pressure between High and Low pressure pipe during operation switching - 218 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 220 Setting, the Address of indoor_10(When manual Address) SW04M Setting, the Address of indoor_1(When Manual Address) SW05M Setting, HR Unit Number - 219 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 221 2. Special control ......................224 2.1 Oil return/defrost control ..................224 2.2 Liquid bypass control ....................224 2.3 Subcooling EEV control ...................224 - 220 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 222 0 < timer < 180 Close Close Close timer = 0 Open Close Close Stop or Keep Keep Close Ventilation - 221 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 223 Subcooling EEV works with Fuzzy rules to keep the degree of subcooling at the outlet of subcooler during simultaneous operation The degree of Subcooling = T outlet of Subcooler – T inlet of Subcooler. - 222 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 224 Part 5 PCB Setting and Test Run - 223 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 225 1) Selection of the method for addressing valves of an HR unit (Auto/Manual) Switch No.1 Off Switch No.1 On Manual Auto - 224 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 226 If you want to use a PRHR040 for 2 rooms HR unit after closing the 3rd and 4th pipes, set the dip switch for 2 rooms HR unit. The unused port must be closed with a copper cap, not with a plastic cap. - 225 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 227 Increase in the digit of 10 of valve address SW04M Increase in the last digit of valve address SW04M - 226 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 228 ❈ Auto pipe detection function : the function that sets connection relationship automatically between the indoor unit and HR unit. - 227 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 229 • If you want to change the setting of manual pipe, you should do it on HR unit PCB. • If an error occurred, it means that manual pipe setting is not completed. - 228 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 230 HR and indoor units Retry indoor unit auto-addressing after checking trouble Completion of auto addressing Incompletion of auto addressing - 229 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 231 ❇ It is possible to be generated mode changing noise of heating and cooling which is normal. There is no mode changing noise at normal operation. - 230 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 232 Turn No.6 of SW03M of outdoor unit PCB Completion of manual pipe detection Reset the power of outdoor unit PCB. - 231 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 233 Setup and Contents • Operation: more than 2 dip switches turned on. • Display: "Er" is displayed in 7-SEG SW01M SW03M - 232 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 234 Main Unit PCB 7 Segments (Shows setting status) SW03M (DIP switch) Sub Unit PCB (Shows setting status) SW03M (DIP switch) - 233 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 235 Product may not properly operate if the relevant DIP switch is not properly setup. LED location of the sub part LED8 LED7 LED6 LED5 LED4 LED3 LED2 LED1 - 234 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 236 #2 off during the instant indoor data checking mode, the mode is ended. After that, restore the address dip switch setting. - 235 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 237 12) Manual Pipe Detection : Matching HR UNIT Valve and Indoor Unit After turn no6 s/w on ,Reset PCB power After finish Manual Pipe Detection, Must turn off no6 s/w - 236 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 238 6) Backup operation 3 : in case of both compressors damaged Setting before applying the power Set at the disabled unit. - 237 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 239 No. B group (B0~BF) No. C group (C0~CF) No. D group (D0~DF) No. E group (E0~EF) No. F group (F0~FF) - 238 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 240 Valve (03) Indoor unit (03) HR unit Valve (02) Indoor unit (02) Valve (01) Indoor unit (01) Central control address - 239 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 241 LED in outdoor units. CAUTION • Before operating the Unit, main power to be supplied for 6 hours. - 240 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 242 Replacement procedure for Compressor(ARUB808T1 TO ARUB4008T1) 1. Replacement procedure for Compressor.......242 1.1 Replacement procedure ............244 - 241 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 243 13) Charge refrigerant after the completion of vacu- um drying, and check the function of compres- sor with cooling or heating operation. - 242 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 244 Part 6 Trouble shooting guide - 243 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 245 Trouble Shooting guide 1. The phenomena from main component failure .....245 2. Checking Method for key components........246 3. Selt-diagnosis function............254 - 244 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 246 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 - 245 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 247 (when measuring absolute values). Accurate measuring values cannot be obtained with a gen- eral movable tester (For analog and digital mode). - 246 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 248 3. If problems continue to occur even after counter- measure of No.1 and No.2, it means that both boards has defect. - 247 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 249 Full open from EEV. open 1350 pulses - If liquid refrigerant is in EEV, the noise is lower. pulse - 248 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 250 When the coil part is removed or assembled, be careful not to bend the pipe of the body. A part - 249 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 251 If estimated temperature is very low in comparison with suction temperature which is displayed at remote controller then the valve is not fully closed - 250 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 252 LED 01Y (in inverter board, refer to page 172) turned off (wait 3 minutes after main power OFF), otherwise it may cause electrical shock. - 251 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 253 LED 01Y (in inverter board, refer to page 172) turned off (wait 3 minutes after main power OFF), otherwise it may cause electrical shock. - 252 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 254 LED 01Y turned off (wait 3 minutes after main power OFF), otherwise it may cause electrical shock. - 253 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 255 Low pressure of main outdoor unit System is off by excessive decrease of low pressure of main outdoor unit - 254 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 256 Overheat of inverter heatsink Overheat of inverter heatsink Temperature sensor of fan Temperature sensor of fan is open or short - 255 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 257 Temperature sensor of front-side heat exchanger of sub1 Temperature sensor of front-side heat unit is open or short exchanger of sub1 outdoor unit - 256 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 258 Low/high voltage of sub1 outdoor Input voltage of sub1 outdoor unit is more than 487V or unit less than 270V - 257 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 259 Liquid pipe sensor of HR unit 7 Liquid pipe sensor of HR unit 7 is open or short - 258 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 260 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. - 259 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 261 CN-PIPE2 : Pipe outlet temp sensor CN-PIPE1 : Pipe inlet temp sensor Measure the resistance of outlet pipe temp sensor. - 260 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 262 ❇ The PCB can differ from model to model. Check from the right source. Checking transmission cable connection status - 261 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 263 * 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➠ Open) Condensate water - 262 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 264 (Marked as CN-DPUMP) Float switch connector Float switch Housing (CN-FLOAT) [***] Standard of drain pipe head height / slope MAX 450 - 263 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 265 (-9V~+9V) then transmission from indoor unit is normal transmission from outdoor unit is normal - 264 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 266 - Replace the indoor unit PCB, and then make sure to do Auto addressing and input the address of central control - 265 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 267 (Notice: The connection of motor connector to PCB should be done under no power supplying to PCB) - 266 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 268 After ODU main PCB After Auto addressing, Replace indoor unit 485 reset, error code error code disappears? transmission PCB disappears? - 267 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 269 Replace Magnetic switch Normal? Check main power and installation condition * Check the soldering state of IPM SUB PCB - 268 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 270 (heating) / outdoor (cooling) or not * measure the current passing through CT by clamp meter - 269 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 271 2 terminal as below is more than 270V Check whether all the connections and terminals is normal and reconnect - 270 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 272 LGMV similar as Replace high pressure sensor at manifold gauge? Check pipe is blocked or not and take measure - 271 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 273 * 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 - 272 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 274 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) - 273 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 275 Check another components Is there pipe and operation conditions (strainer etc.) clogging? / Take measures Replace strainer - 274 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 276 Replace sensor of high pressure value(Is it high actually)? Check indoor unit LEV Check indoor unit PCB Check in/outdoor installation condition - 275 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 277 (Notice: it is not full ice forming of strainer, in case that there is installation conditions not at inlet portion but at outlet portion) - 276 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 278 2A?* Check connection state of R phase cable and reconnect * Measure the R phase current with clamp meter - 277 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 279 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 - 278 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 280 PCB pressure sensor is the system normal? High pressure sensor Low pressure Pressure sensor connection sensor on main PCB - 279 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 281 Abnormal value of exchanger in main Refer to CH45 sensor (Open/Short) (Heat exchanger B) & sub outdoor unit heat exchanger (B) - 280 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 282 * In order to check transmission cables between outdoor units, check in order as below ➠ : PCB connectors ➠ terminal block transmission cables - 281 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 283 * 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 - 282 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 284 In case that only transmission PCB is replaced above process is not needed - 283 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 285 ** 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 - 284 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 286 Heat sink cooling fan drive connector in main PCB Heat sink temperature sensor connection Check DC 12V output during inverter compressor operation - 285 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 287 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 - 286 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 288 Replace related SUB PCB Is transmission cables of outdoors connected Re-connect transmission cables correctly? [refer electric component part] Replace MAIN PCB - 287 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 289 ** Location of inverter transmission connector of *Location of PCB transmission connector of Main PCB and LED Inverter FAN and LED - 288 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 290 * The dashed line(---) in above flow chart is only applicable for Multi V Space ** position of inverter fan motor connector Inverter fan main PCB - 289 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 291 Replace inverter fan PCB * Location of fan DC link connector Inverter fan main PCB Inverter fan IPM PCB - 290 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 292 Refer to CH104 outdoor units (Sub1) 147, 149, 171 ➔ Sub outdoor units are not receiving signal from Main outdoor unit - 291 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 293 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 - 292 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 294 Sensor measured value of resis- Outdoor liquid pipe (con- Refer to CH113 tance is abnormal (Open/Short) denser) sensor error (Sub1) - 293 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 295 Sensor measured value is abnor- Refer to CH45 exchanger (A,B) pipe mal (Open/Short) temperature sensor error (Sub2 HEX B) - 294 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 296 Error Point Main Reasons 148 (Sub1) Outdoor voltage sensing Refer to CH49 Measured value is abnormal (Open/Short) error 150 (Sub2) - 295 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 297 If the same error is occurred in mode, is the same error near future replace 4way valve occurred again? Replace 4 way valve***** - 296 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 298 ➃ If there is a unit in which the difference is not increased then the 4way valve of that unit is defective - 297 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 299 Compressor suction tempera- Abnormal resistance value of sensor Refer to CH46 161(Sub3) ture error measurement ( Open / Short ) - 298 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 300 = 3phase Excessive Low voltage / Refer to CH25 171(Sub3) 380V±10% High voltage 2. Single phase = 220V ±10% - 299 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 301 Is outdoor air temperature temperature sensor sensor normal? Replace outdoor unit PCB * cables connection between constant compressor and magnetic switch - 300 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 302 [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' - 301 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 303 Retry auto-addressing after checking trouble equal? Incompletion of auto-addressing End of auto-addressing - 302 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 304 Try manual addressing after checking and confirming there is no error. End of manual addressing - 303 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 305 (The valves does not work if the address numbers are same.) - 304 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 306 1) Selection of the method for addressing valves of an HR unit (Auto/Manual) Switch No.1 Off Switch No.1 On Manual Auto - 305 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 307 Indoor unit Large indoor unit Indoor unit Notice: If you installed by valve grouping you need to use manual addressing. - 306 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 308 - 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 - 307 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 309 [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 - 308 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 310 1. CNU defect Central controller Receive tral controller from CNU with- 2. Initialization failure of central controller Timeout in designated time - 309 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 311 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 - 310 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 312 Part 7 Exploded view - 311 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 312 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 313 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 314 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 315 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 316 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 317 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 318 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 319 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 320 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 321 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 322 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 323 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 324 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 325 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only 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 - 326 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 328 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red - 327 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 329 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red - 328 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 330 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red - 329 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 331 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red - 330 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 332 THERMISTOR 1 567480A Air + Eva. IN Housing color : white THERMISTOR 2 567480B Eva. OUT Housing color : red - 331 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 333 THERMISTOR 1 567480A Air + Eva. IN Housing color : white THERMISTOR 2 567480B Eva. OUT Housing color : red - 332 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 334 THERMISTOR 1 567480A Air + Eva. IN Housing color : white THERMISTOR 2 567480B Eva. OUT Housing color : red - 333 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 335 THERMISTOR 1 567480A Air + Eva. IN Housing color : white THERMISTOR 2 567480B Eva. OUT Housing color : red - 334 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 336 THERMISTOR 1 567480A Air + Eva. IN Housing color : white THERMISTOR 2 567480B Eva. OUT Housing color : red - 335 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 337 THERMISTOR 1 567480A Air + Eva. IN Housing color : white THERMISTOR 2 567480B Eva. OUT Housing color : red - 336 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 338 Housing color : yellow THERMISTOR 2 263230 Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red - 337 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 339 THERMISTOR 1 567480A Air + Eva. IN Housing color : white THERMISTOR 2 567480B Eva. OUT Housing color : red - 338 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 340 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red - 339 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 341 Housing color : yellow THERMISTOR 2 567480B Eva. IN Housing color : white THERMISTOR 3 567480C Eva. OUT Housing color : red - 340 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 342 261704B W0FZZB 268711-8 268711D W6631B W6631A W6640C W6640B COMP COMP 566001 W6640A 268711-7 649950A 649950B 566001 268711-9 W6200 261704D - 341 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 343 Exploded View Sub Unit 566001 W0CZZB 566001 W6631B W6640C W6631C COMP COMP 649950C 268711D 261704D - 342 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 344 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black - 343 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 345 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black - 344 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 346 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black - 345 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 347 W0FZZB 268200 W6640C 261704A 566001 W0CZZB 268711C 261704B W6640B 261704D 649950B W6631C W6631A 268711-9 268711D 268711-8 268711-7 649950A W6640A - 346 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
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  • Page 349 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black - 348 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 350 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black - 349 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 351 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black - 350 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 352 Housing color : purple THERMISTOR 3 263230C Air + Suction Pipe + Const. Discharge Pipe Housing color : black - 351 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 353 Exploded View HR UNIT / 40 561410H 561410G 561410F 561410D 561410E 561410C 561410B 561410J 561410A 261704 137213A 268711B - 352 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
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