LG Multi V ARNU Series Service Manual

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Table of Contents

Quick Links

Internal Use Only

http://biz.lgservice.com

System

Indoor Unit

R410A

SERVICE MANUAL R410A

MODEL : ARNU Series

URNU Series

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual.

Only for authorized service personnel.

Table of Contents

Troubleshooting

Summary of Contents for LG Multi V ARNU Series

Page 1 Internal Use Only http://biz.lgservice.com System Indoor Unit R410A SERVICE MANUAL R410A MODEL : ARNU Series URNU Series CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.
Page 2: Table Of Contents
Ceiling & Floor Ceiling Suspended ....................87 Floor Standing Type........................94 Vertical Air Handling Unit ......................101 Part 3 Trouble shooting guide................109 - 2 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 3: Part 1 General Information
Part 1 General Information 1. Model Names ..........4 2. External Appearance .........5 3. Nomenclature ..........6 - 3 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 4: Model Names
*ART COOL- SE/S8( * R:Mirror, V:Silver, B : Blue), SF(* E:Red, V:Silver, G:Gold , 1: Kiss (Photo changeable)) *Wall Mounted- A: Basic, L:Plasma, *Ceiling Cassette- A: Basic, C:Plasma - 4 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 5: External Appearance
ARNU243CFU2 ARNU243VJA2 Vertical AHU Ceiling Cassette -2Way ARNU183NJA2 ARNU183TL*2 ARNU243NJA2 ARNU243TL*2 ARNU303NJA2 ARNU363NJA2 ARNU423NKA2 * A:Basic, C:Plasma ARNU483NKA2 ARNU543NKA2 - 5 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 6: Nomenclature
V: AC Inverter and C/O U: DC Inverter and H/P and C/O System with Indoor Unit using R410A ❈ LGETA:U Ex) URN - 6 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 7: Part 2 Indoor Units
Wall Mounted ..............76 Ceiling & Floor Ceiling & Floor Ceiling Suspended............87 Floor Standing Floor Standing..............94 Vertical Air Handling Unit..........117 - 7 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 8: Ceiling Mounted Cassette Type (1 Way)
Ceiling Mounted Cassette Type (1Way) 1. Functions ..................9 2. Operation Details................10 3. Dimensions .................12 - 8 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 9 Central Control(Optional) • It is operating individually or totally by central control function. - 9 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 10 To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 - 10 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 11 • The operation diagram is as following. Pipe temperature 35°C(94°F) 30°C(86°F) 27°C(80°F) 25°C(76°F) 22°C(72°F) Indoor fan SELECTED LOLOW speed COMP - 11 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 16: Ceiling Mounted Cassette Type (2 Way)
Ceiling Mounted Cassette Type (2Way) 1. Functions ..................17 2. Operation Details................18 3. Dimensions .................20 - 16 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 17 • It is operating individually or totally by central control function. Central Control(Optional) - 17 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 18 To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 - 18 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 19 • The operation diagram is as following. Pipe temperature 35°C(94°F) 30°C(86°F) 27°C(80°F) 25°C(76°F) 22°C(72°F) Indoor fan SELECTED LOLOW speed COMP - 19 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 21: Ceiling Mounted Cassette Type (4 Way)(1)
Ceiling Mounted Cassette Type (4Way) (1) 1. Functions ..................22 2. Operation Details................23 3. Dimensions .................25 - 21 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 22 • It is operating individually or totally by central control function. Central Control(Optional) Swirl Swing Control • It is operating swirl swing - 22 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 23 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 - 23 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 24 • The operation diagram is as following. Pipe temperature 35°C(94°F) 30°C(86°F) 27°C(80°F) 25°C(76°F) 22°C(72°F) Indoor fan SELECTED LOLOW speed COMP - 24 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 27: Ceiling Mounted Cassette Type (4 Way)(2)
Ceiling Mounted Cassette Type (4Way) (2) 1. Functions ..................28 2. Operation Details................29 3. Dimensions .................31 - 27 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 28 • It is operating individually or totally by central control function. Swirl Swing Control • It is operating swirl swing - 28 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 29 To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 - 29 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 30 • The operation diagram is as following. Pipe temperature 35°C(94°F) 30°C(86°F) 27°C(80°F) 25°C(76°F) 22°C(72°F) Indoor fan SELECTED LOLOW speed COMP - 30 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 34: Art Cool Type(Mirror)
Art Cool Type(Mirror) 1. Functions ..................35 2. Operation Details................36 3. Dimensions .................43 - 34 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 35 • The louver can be set at the desired position or swing at 28°C(82°F). up and down automatically. - 35 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 36 Compressor OFF Temp. => Setting Temp-0.5°C(33°F) • In 10-min dehumidification operation, the indoor fan operates with the low airflow speed. n Heating Mode Operation - 36 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 37 • If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10 sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated. - 37 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 38 • While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in dehumidification operation. - 38 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 39 • 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. - 39 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 41 6°C(43°F) or after 90 seconds, if the pipe temperature does not rise to 6°C(43°F), outdoor fan motor runs continuously at even below 3°C(37°F). - 41 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 42 When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B) will be operated again. - 42 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 45 ArtCoolGallery 1. Functions ..................46 2. Operation Details................47 3. Dimensions .................54 - 45 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 46 28°C(82°F). • The louver can be set at the desired position or swing up and down automatically. - 46 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 47 • 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. - 47 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 48 • While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper- - 48 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 49 When 0.5°C(33°F) or more above the setting temp, the com- pressor is turned on. Compressor ON Temp => Setting Temp+0.5°C(33°F) Compressor OFF Temp => Setting Temp+0.5°C(33°F) - 49 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 50 • 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. - 50 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 52 6°C or after 90 seconds, if the pipe temperature does not rise to 6°C(43°F), outdoor fan motor runs con- tinuously at even below 3°C(37°F). - 52 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 53 When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B) will be operated again. - 53 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 55: Ceiling Concealed Duct Type (Low Static)
Ceiling Concealed Duct Type (Low static) 1. Funtions ..................56 2. Operation Details................57 3. Dimensions .................60 - 55 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 56 High head height Drain pump is possible. • It is operating individually or totally by central control function. Central Control(Optional) - 56 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 57 To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 - 57 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 58 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 28°C(82°F) 28°C(82°F) Setting Temperature T 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 30°C(86°F) 30°C(86°F) - 58 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 59 ¿ Power Off ‡ On ¡ Operation Off ‡ On ¬ Cooling operation ‡ Heating operation √ Defrost operation - 59 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 61: Ceiling Concealed Duct Type (Built In)
Ceiling Concealed Duct Type (Built in) 1. Funtions ..................62 2. Operation Details................63 3. Dimensions .................66 - 61 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 62 High head height Drain pump is possible. • It is operating individually or totally by central control function. Central Control(Optional) - 62 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 63 To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 - 63 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 64 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 28°C(82°F) 28°C(82°F) Setting Temperature T 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 30°C(86°F) 30°C(86°F) - 64 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 65 ¿ Power Off ‡ On ¡ Operation Off ‡ On ¬ Cooling operation ‡ Heating operation √ Defrost operation - 65 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 67: Ceiling Concealed Duct Type (High Static)
Ceiling Concealed Duct Type (High Static) 1. Funtions ..................68 2. Operation Details................69 3. Dimensions .................72 - 67 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 68 High head height Drain pump is possible. • It is operating individually or totally by central control function. Central Control(Optional) - 68 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 69 More than -0.5°C(33°F)) 3 minutes 3 minutes Selecting Selecting Selecting INDOOR FAN fan speed fan speed fan speed COMPRESSOR - 69 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 70 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 28°C(82°F) 28°C(82°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 30°C(86°F) 30°C(86°F) Setting Temperature T - 70 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 71 ¿ Power Off ‡ On ¡ Operation Off ‡ On ¬ Cooling operation ‡ Heating operation √ Defrost operation - 71 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 76 Wall Mountedd Type 1. Functions ..................77 2. Operation Details................78 3. Dimensions .................85 - 76 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 77 28°C(82°F). • The louver can be set at the desired position or swing up and down automatically. - 77 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 78 • 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. - 78 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 79 • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. - 79 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 80 When 0.5°C(33°F) or more above the setting temp, the compressor is turned on. Compressor ON Temp => Setting Temp+0.5°C(33°F) Compressor OFF Temp => Setting Temp+0.5°C(33°F) - 80 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 81 • 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. - 81 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 82 • Operation Mode that is kept on the memory - State of Operation ON/OFF - 82 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 83: Forced Operation
"beep-beep-beep-beep-beep-" is made 10 times to indicate that the remote control signal cannot be received. - 83 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 84 When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B) will be operated again. - 84 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 87: Ceiling & Floor Ceiling Suspended
Ceiling & Floor Ceiling Suspended 1. Funtions ..................88 2. Operation Details................89 3. Dimensions .................92 - 87 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 88 High head height Drain pump is possible. • It is operating individually or totally by central control function. Central Control(Optional) - 88 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 89 To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 - 89 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 90 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 28°C(82°F) 28°C(82°F) Setting Temperature T 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 30°C(86°F) 30°C(86°F) - 90 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 91 ¿ Power Off ‡ On ¡ Operation Off ‡ On ¬ Cooling operation ‡ Heating operation √ Defrost operation - 91 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 94: Floor Standing Type
Floor Standing Type 1. Function ..................95 2. Operation Details................96 3. Dimensions .................99 - 94 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 95 High head height Drain pump is possible. • It is operating individually or totally by central control function. Central Control(Optional) - 95 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 96 To be selected higher temperature 2TH (Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo. Remo. Mode ST+0.5 ST-0.5 - 96 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 97 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 28°C(82°F) 28°C(82°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 30°C(86°F) 30°C(86°F) Setting Temperature T - 97 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 98 ¿ Power Off ‡ On ¡ Operation Off ‡ On ¬ Cooling operation ‡ Heating operation √ Defrost operation - 98 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 101: Vertical Air Handling Unit
Vertical Air Handling Unit 1. Funtions ..................102 2. Operation Details..............103 3. Dimensions ................107 - 101 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 102 Hot-start Control (Heating) temperature reaches 25°C(76°F) • It is operating individually or totally by central control function. Central Control(Optional) - 102 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 103 More than -0.5°C(33°F)) 3 minutes 3 minutes Selecting Selecting Selecting INDOOR FAN fan speed fan speed fan speed COMPRESSOR - 103 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 104 Chassis Hotstart On 19°C(66°F) 19°C(66°F) Hotstart Off 22°C(72°F) 22°C(72°F) Low temperature T 25°C(76°F) 25°C(76°F) 27°C(80°F) 27°C(80°F) Setting Temperature T - 104 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 105 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 28°C(82°F) 28°C(82°F) Setting Temperature T 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 30°C(86°F) 30°C(86°F) - 105 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 106 Heater ON Heater ON Indoor unit Heat-Exchanger temperature 45℃ (113℉) 42℃ (108℉) 30℃ (86℉) 28℃ (82℉) Heater 2 Heater 1 - 106 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 110: Trouble Shooting Guide
Trouble shooting guide Self-diagnosis function ..............111 - 110 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 111: Error Display
Disconnecting the fan motor connector/Failure of indoor fan motor lock Poor fan motor operation Air temperature sensor of indoor unit is open or short - 111 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 112 CN_ROOM: Indoor air temp sensor <Fresh Air Intake Unit> Measure the resistance of outlet pipe temp sensor. <Standard Indoor Unit> - 112 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 113 CN-REMO : Remote controller connection The PCB can differ from model to model. Check from the right source. Checking transmission cable connection status - 113 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 114 * If the float goes up higher than a half of float switch then the circuit is open & the unit is stopped automatically. - 114 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 115 Float switch connector Float switch Housing (CN-FLOAT) [***] Standard of drain pipe head height / slope MAX 450 700mm(27-9/16inch) - 115 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 116 (-9V~+9V) then of communication terminal between IDU and ODU transmission from outdoor unit is normal - 116 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 117 With cableless remote controller: Turn off indoor unit, and then turn on by changing the operation mode. The error will disappear. - 117 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 118 - Replace the indoor unit PCB, and then make sure to perform Auto addressing and input the address of central control - 118 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 119 (Notice: The connection of motor connector to PCB should be done under no power supplying to PCB) - 119 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 120 NOVEMBER, 2010 P/NO : MFL50459505...

This manual is also suitable for:

Multi v urnu series

LG Multi V ARNU Series Service Manual

Part 1 General Information

Model Names

External Appearance

Nomenclature

Part 2 Indoor Units

Part 3 Trouble Shooting Guide

Quick Links

Troubleshooting

Summary of Contents for LG Multi V ARNU Series

Page 2: Table Of Contents

Page 3: Part 1 General Information

Page 4: Model Names

Page 5: External Appearance

Page 6: Nomenclature

Page 7: Part 2 Indoor Units

Page 8: Ceiling Mounted Cassette Type (1 Way)

Page 16: Ceiling Mounted Cassette Type (2 Way)

Page 21: Ceiling Mounted Cassette Type (4 Way)(1)

Page 27: Ceiling Mounted Cassette Type (4 Way)(2)

Page 34: Art Cool Type(Mirror)

Page 55: Ceiling Concealed Duct Type (Low Static)

Page 61: Ceiling Concealed Duct Type (Built In)

Page 67: Ceiling Concealed Duct Type (High Static)

Page 83: Forced Operation

Page 87: Ceiling & Floor Ceiling Suspended

Page 94: Floor Standing Type

Page 101: Vertical Air Handling Unit

Page 109: Part 3 Trouble Shooting Guide

Page 110: Trouble Shooting Guide

Page 111: Error Display

This manual is also suitable for:

LG Multi V ARNU Series Service Manual

Part 1 General Information

Model Names

External Appearance

Nomenclature

Part 2 Indoor Units

Part 3 Trouble Shooting Guide

Quick Links

Troubleshooting

Related Manuals for LG Multi V ARNU Series

Summary of Contents for LG Multi V ARNU Series

This manual is also suitable for:

Table of Contents