LG multi V ARUN Series Installation Manual
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LG multi V ARUN Series Installation Manual

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INSTALLATION MANUAL
AIR CONDITIONER
• Please read this installation manual completely before installing the product.
• Installation work must be performed in accordance with the national
wiring standards by authorized personnel only.
• Please retain this installation manual for future reference after reading
it thoroughly.your set and retain it for future reference.
MODELS : ARUN Series
ARUV Series
P/NO : MFL67221402
www.lg.com
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Summary of Contents for LG multi V ARUN Series

  • Page 1 • Installation work must be performed in accordance with the national wiring standards by authorized personnel only. • Please retain this installation manual for future reference after reading it thoroughly.your set and retain it for future reference. MODELS : ARUN Series ARUV Series www.lg.com P/NO : MFL67221402...

  • Page 2: Table Of Contents

    ARUN/ARUV Series Outdoor unit Installation Manual TABLE OF CONTENTS Safety Precautions ........................3 Installation Process ......................7 Outdoor units Information....................8 Environment-friendly Alternative Refrigerant R410A .............14 Select the Best Location ....................14 Installation Space........................15 Lifting method ........................17 Installation ...........................18 Refrigerant piping installation ...................23 Pipe connections between indoor and outdoor unit ............27 Electrical Wiring ........................53 Test Run ..........................85 New Function ........................111...

  • Page 3: Safety Precautions

    Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. This symbol indicates the possibility of death or serious injury.
  • Page 4 Safety Precautions When installing and moving the air conditioner to Do not reconstruct to change the settings of the another site, do not charge it with a different protection devices. refrigerant from the refrigerant specified on the unit. • If a different refrigerant or air is mixed with the original •...
  • Page 5 Safety Precautions Keep level even when installing the product. Do not install the unit where combustible gas may leak. • If the gas leaks and accumulates around the • To avoid vibration or water leakage. unit, an explosion may result. Use power cables of sufficient current Do not use the product for special purposes, carrying capacity and rating.
  • Page 6 Safety Precautions Be very careful about product transportation. • Only one person should not carry the product if it weighs more than 20 kg. • Some products use PP bands for packaging. Do not use any PP bands for a means of transportation.

  • Page 7: Installation Process

    Installation Process Installation Process Indicate clearly who will be responsible for switch setting. Determination of division work Preparation of contract drawings Make connection clearly between outdoor, indoor, remote controller and option. Take account of gradient The foundation must be level even Sleeve and insert work Outdoor unit foundation work of drain piping...

  • Page 8: Outdoor Units Information

    Outdoor units Information Outdoor units Information n Combination Ration(50~200%) Outdoor Number Connection Capacity Single outdoor units 200% Double outdoor units 160% Triple outdoor units 130% Notes: * We can guarantee the operation only within 130% Combination. If you want to connect more than 130% combination, please contact us and discuss the requirement like below.
  • Page 9 Outdoor Units Information Unit 2 Outdoor Unit System(HP) Model ARUN220LN3 ARUN240LN3 ARUN260LN3 ARUN280LN3 ARUN120LN3 ARUN120LN3 ARUN140LN3 ARUN160LN3 ARUN100LN3 ARUN120LN3 ARUN120LN3 ARUN120LN3 Product Charge 12.8 12.8 13.4 13.4 Max. Connectable No. of Indoor Units 35(44) 39(48) 42(52) 45(56) Net Weight 240 x 2 240 x 2 240 ×...
  • Page 10 Outdoor Units Information Unit 3 Outdoor Unit System(HP) Model ARUN540LN3 ARUN560LN3 ARUN580LN3 ARUN600LN3 ARUN200LN3 ARUN200LN3 ARUN200LN3 ARUN200LN3 ARUN200LN3 ARUN200LN3 ARUN200LN3 ARUN200LN3 ARUN140LN3 ARUN160LN3 ARUN180LN3 ARUN200LN3 Product Charge 25.0 25.0 25.5 27.0 Max. Connectable No. of Indoor Units Net Weight 260 × 1 + 325 × 2 260 ×...
  • Page 11 Outdoor Units Information n Cooling Only Unit 1 Outdoor unit System(HP) Model ARUV60LT3 ARUV80LT3 ARUV100LT3 ARUV120LT3 ARUV60LT3 ARUV80LT3 ARUV100LT3 ARUV120LT3 Product Charge Max. Connectable No. of Indoor Units 10(12) 13(20) 16(25) 20(30) Net Weight 155 x 1 155 x 1 185 x 1 235 x 1 341 x 1...
  • Page 12 Outdoor Units Information Unit 2 Outdoor Unit 3 Outdoor Unit System(HP) Model ARUV380LT3 ARUV400LT3 ARUV420LT3 ARUV440LT3 ARUV200LT3 ARUV200LT3 ARUV140LT3 ARUV160LT3 ARUV180LT3 ARUV200LT3 ARUV140LT3 ARUV140LT3 ARUV140LT3 ARUV140LT3 Product Charge 16.5 18.0 19.2 19.8 Max. Connectable No. of Indoor Units 61(64) Net Weight 310 ×...
  • Page 13 Outdoor Units Information Unit 4 Outdoor Unit System(HP) Model ARUV620LT3 ARUV640LT3 ARUV660LT3 ARUV680LT3 ARUV200LT3 ARUV200LT3 ARUV200LT3 ARUV200LT3 ARUV140LT3 ARUV160LT3 ARUV180LT3 ARUV200LT3 ARUV140LT3 ARUV140LT3 ARUV140LT3 ARUV140LT3 ARUV140LT3 ARUV140LT3 ARUV140LT3 ARUV140LT3 Product Charge 28.2 28.8 29.3 30.8 Max. Connectable No. of Indoor Units Net Weight 235 ×...

  • Page 14: Environment-Friendly Alternative Refrigerant R410A

    Environment-friendly Alternative Refrigerant R410A Environment-friendly Alternative Refrigerant R410A • The refrigerant R410A has the property of higher operating pressure in comparison with R22. Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this characteristic should be also considered during the installation. R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is 0.

  • Page 15: Installation Space

    Installation Space Installation Space Individual Installation n During the installation of the unit, consider service, inlet, and outlet and acquire the minimum space as shown in the figures below. Case 1 Case 2 Category Installation Space (10mm≤Si d e Space≤49mm) (Si d e Space≥49mm) A≥10 A≥50...
  • Page 16 Installation Space Seasonal wind and cautions in winter • Sufficient measures are required in a snow area or severe cold area in winter so that product can be operated well. • Get ready for seasonal wind or snow in winter even in other areas. •...

  • Page 17: Lifting Method

    Lifting Method Lifting method • When carrying the suspended, unit pass the ropes under the unit and use the two suspension points each at the front and rear. • Always lift the unit with ropes attached at four points so that impact is not applied to the unit. •...

  • Page 18: Installation

    Installation Installation • Install at places where it can endure the weight and vibration/noise of the outdoor unit. • The outdoor unit supports at the bottom shall have width of at least 100mm under the unit°Øs legs before being fixed. •...
  • Page 19 Installation Foundation for Installation • Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust. • Use the H-beam support as a base support • Noise and vibration may occur from the floor or wall since vibration is transferred through the installation part depending on installation status.
  • Page 20 Installation Preparation of Piping Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure. 1) Cut the pipes and the cable. n Use the accessory piping kit or the pipes purchased Copper Slanted Uneven Rough locally.
  • Page 21 Installation FLARE SHAPE and FLARE NUT TIGHTENING TORQUE Precautions when connecting pipes • See the following table for flare part machining dimensions. • When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three or four times at first.
  • Page 22 Installation HEAT INSULATION 1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C). Fastening band (accessory) 2. Precautions in high humidity circumstance: This air conditioner has been tested according to the "ISO Conditions with Mist" and confirmed that there is not any default.

  • Page 23: Refrigerant Piping Installation

    Refrigerant piping installation Refrigerant piping installation Precautions on Pipe connection / Valve operation Pipe connection is done by connecting from the end of the pipe to the branching pipes, and the refrigerant pipe coming out of the outdoor unit is divided at the end to connect to each indoor unit. Flare Gas pipe connection for the indoor unit, and welding connection for the outdoor Liquid pipe...
  • Page 24 Refrigerant piping installation Connection of Outdoor units 2 outdoor units [Unit : mm] Outdoor units Model Gas pipe Liquid pipe I.D.15.88 I.D.15.88 I.D.28.58 I.D.28.58 ARCNN21 I.D.12.7 I.D.9.52 2 Unit I.D.19.05 I.D.22.2 I.D.31.8 I.D.34.9 I.D.41.3 I.D.38.1 O.D.34.9 I.D.22.2 O.D.19.05 I.D.12.7 I.D.15.88 I.D.28.58 3 Unit ARCNN31...
  • Page 25 Refrigerant piping installation Caution 1. Use the following materials for refrigerant piping. • Material: Seamless phosphorous deoxidized copper pipe • Wall thickness : Comply with the relevant local and national regulations for the designed pressure 3.8MPa. We recommend the following table as the minimum wall thickness. Outer diameter 6.35 9.52...
  • Page 26 Refrigerant piping installation 12. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling performance, drip of condensate and other such problems. 13. When connecting the refrigerant piping, make sure the service valves of the Outdoor Unit is completely closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor Units has been connected, a refrigerant leakage test has been performed and the evacuation process has been completed.

  • Page 27: Pipe Connections Between Indoor And Outdoor Unit

    Pipe connections between indoor and outdoor unit Pipe connections between indoor and outdoor unit • Pipe connections can be done on the front side or on the side according to the installation environments. • Be sure to let 0.2kgf/cm Nitrogen flow in the pipe when welding. •...
  • Page 28 Pipe connections between indoor and outdoor unit n Remove leakage prevention cap Service Port • Remove the leakage prevention cap attached to the outdoor unit service valve before pipe work. • Proceed the leakage prevention cap removal as follows: 1. Verify whether the liquid/gas/common pipes are Liquid pipe locked.
  • Page 29 Pipe connections between indoor and outdoor unit n Method of drawing out pipes on the bottom side ① Drawing out common pipe through side panel Common pipe Liquid pipe Gas pipe Remove only liquid/gas pipe Knock Out Remove Base Pan ②...
  • Page 30 Pipe connections between indoor and outdoor unit Refrigerant piping system u Y branch method 1 Outdoor Units Example : 5 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Indoor Units L150m (200 m : Conditional application) l 40m (90 m : Conditional application) 2 Outdoor Units Slave...
  • Page 31 Pipe connections between indoor and outdoor unit 3 Outdoor Units Slave2 Slave1 Example : 5 Indoor Units Master connected Ⓐ : Outdoor Unit 10m or less ODU Capacity Ⓑ : 1st branch (Y branch) Master ≥ Slave1 ≥ Slave 2 Ⓒ...
  • Page 32 Pipe connections between indoor and outdoor unit Ú Refrigerant pipe diameter from branch to branch (B,C,D) Liquid pipe Gas pipe Downward Indoor Unit total capacity [mm(inch)] [mm(inch)] [kW(Btu/h)] ≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2) < 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8) ≤ 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4) <...
  • Page 33 Pipe connections between indoor and outdoor unit Header Method 1 Outdoor Unit Example : 6 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch Ⓒ : Indoor Units Ⓓ : Sealed piping L 200m 2 Outdoor Units Slave Slave Slave Example : 6 Indoor Units connected...
  • Page 34 Pipe connections between indoor and outdoor unit 3 Outdoor Units Slave2 Slave1 Example : 6 Indoor Units connected Master Ⓐ : Outdoor Unit ODU Capacity Ⓑ : Header branch Master ≥ Slave1 ≥ Slave2 10m or less Ⓒ : Indoor Units Ⓓ...
  • Page 35 Pipe connections between indoor and outdoor unit u Combination of Y branch/header method 1 Outdoor Units Example : 5 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Y branch Ⓓ : Indoor Unit Ⓔ...
  • Page 36 Pipe connections between indoor and outdoor unit 3 Outdoor Units Slave2 Slave1 Example : 5 Indoor Units connected Master Ⓐ : Outdoor Unit ODU Capacity Ⓑ : 1st branch(Y branch) Master ≥ Slave1 ≥ Slave2 10m or less Ⓒ : Y branch Ⓓ...
  • Page 37 Pipe connections between indoor and outdoor unit Ú Refrigerant pipe diameter from branch to branch (B,C) Liquid pipe Gas pipe Downward Indoor Unit total capacity [mm(inch)] [mm(inch)] [kW(Btu/h)] ≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2) < 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8) ≤ 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4) <...
  • Page 38 Pipe connections between indoor and outdoor unit u Outdoor unit Connection WARNING • In case of pipe diameter B connected after first branch is bigger than the main pipe diameter A, B should be of the same size with A. Ex) In case indoor unit combination ratio 120% is connected to 70kW outdoor unit.
  • Page 39 Pipe connections between indoor and outdoor unit u Pipe Connection Method/Precautions for Series connections between Outdoor units - Separate Y branch joints are needed for series connections between outdoor units. - Please refer to the below connection examples to install pipe connections between outdoor units. n Pipe connection between outdoor units (General Case) The maximum pipe length...
  • Page 40 Pipe connections between indoor and outdoor unit • The pipes between the outdoor units must maintain horizontal levelness or give an inclination to prevent a back flow toward the slave outdoor unit. Otherwise, the unit may not operate properly. (Example 1) Toward indoor unit Toward indoor unit (Example 2)
  • Page 41 Pipe connections between indoor and outdoor unit • When connecting the pipes between the outdoor units, the accumulation of oil in the slave outdoor unit should be avoided. Otherwise, the unit may not operate properly. (Example 1) Toward indoor unit Toward indoor unit (Example 2) Toward indoor unit...
  • Page 42 Pipe connections between indoor and outdoor unit u The amount of Refrigerant The calculation of the additional charge should take into account the length of pipe and CF(correction Factor) value of indoor unit. Amount refrigerant of Indoor units Total liquid pipe Additional charge(kg) Example) 4Way Ceiling Cassette 14.5kW -1ea :Ø25.4 mm...
  • Page 43 Pipe connections between indoor and outdoor unit WARNING ▶ Regulation for refrigerant leakage : the amount of refrigerant leakage should satisfy the following equation for human safety. Total amount of refrigerant in the system ≤ 0.44 ( kg / m Volume of the room at which Indoor Unit of the least capacity is installed p If the above equation can not be satisfied, then follow the following steps.
  • Page 44 Pipe connections between indoor and outdoor unit Distribution Method 1. Line Distribution Slave Master Slave 3rd main pipe distribution Master Slave Master Main pipe Distribution Main pipe Distribution 2. Vertical Distribution Ensure that the branch pipes are attached vertically. Slave Master Slave Master...
  • Page 45 Pipe connections between indoor and outdoor unit Branch pipe Fitting Y branch To Outdoor Unit To Branch Piping or Indoor Unit • Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.) Horizontal Facing Facing plane downwards upwards Within +/- 10°...
  • Page 46 Pipe connections between indoor and outdoor unit • When the number of indoor units to be connected to the branch pipes is less than the number of branch pipes available for connection then cap pipes should be fitted to the surplus branches. Pinched pipe •...
  • Page 47 Pipe connections between indoor and outdoor unit u Y branch pipe [unit:mm] Models Gas pipe Liquid pipe I.D12.7 I.D12.7 I.D6.35 I.D.6.35 I.D9.52 I.D15.88 I.D15.88 I.D9.52 I.D.6.35 I.D15.88 ARBLN01621 I.D12.7 I.D.9.52 O.D9.52 I.D19.05 O.D15.88 I.D12.7 I.D22.2 I.D19.05 I.D15.88 I.D19.05 I.D12.7 I.D12.7 I.D9.52 I.D19.05 I.D25.4...
  • Page 48 Pipe connections between indoor and outdoor unit u Header [unit:mm] Models Gas pipe Liquid pipe ID12.7 ID6.35 ID6.35 ID12.7 4 branch ID9.52 ID15.88 ID9.52 ARBL054 ID15.88 ID12.7 ID9.52 ID15.88 ID19.05 ID12.7 ID6.35 7 branch ID12.7 ID9.52 ID15.88 120 150 ID15.88 ARBL057 ID9.52 ID15.88...
  • Page 49 Pipe connections between indoor and outdoor unit Leak Test and Vacuum drying (1) Leak test Leak test should be made by pressurizing nitrogen gas to 3.8 MPa(38.7kgf/cm ). If the pressure does not drop for 24 hours, the system passes the test. If the pressure drops, check where the nitrogen leaks. For the test method, refer to the following figure.
  • Page 50 Pipe connections between indoor and outdoor unit (2) Vacuum Vacuum drying should be made from the service port provided on the outdoor unitʼs service valve to the vacuum pump commonly used for liquid pipe, gas pipe and high/low pressure common pipe. (Make Vacuum from liquid pipe, gas pipe and high/low pressure common pipe with the service valve closed.) * Never perform air purging using refrigerant.
  • Page 51 Pipe connections between indoor and outdoor unit Vacuum Mode This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement. Vacuum mode setting method Vacuum mode cancellation method ODU power reset Master unit PCB DIP switch off - Heat pump : switch off 11,14 - Cooling only : switch off 10,12,13 Master unit PCB DIP switch on...
  • Page 52 Pipe connections between indoor and outdoor unit Thermal insulation of refrigerant piping Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit and insulating material, and insulating materials themselves.

  • Page 53: Electrical Wiring

    Electrical Wiring Electrical Wiring Caution 1. Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company. WARNING Be sure to have authorized electrical engineers do the electric work using special circuits in accordance with regulations and this installation manual.
  • Page 54 Electrical Wiring Outdoor Unit Outdoor Unit Master Slave1 Slave2 Master Slave1 Slave2 Indoor Indoor Indoor Indoor Unit Unit Unit Unit Remote Remote Remote Remote controller controller controller controller Outdoor Unit Outdoor Unit Master Slave1 Slave2 Master Slave1 Slave2 Indoor Indoor Indoor Indoor Unit...
  • Page 55 Electrical Wiring Control box and connecting position of wiring - Remove all of the screws at front panel and remove the panel by pulling it forward. - Connect transmission line between main and sub outdoor unit through the terminal block. - Connect transmission lines between outdoor unit and indoor units through the terminal block.
  • Page 56 Electrical Wiring Transmission and Power Lines 1) Transmission cable • Types : shielding wire • Cross section : 1.0~1.5mm • Maximum allowable temperature: 60°C • Maximum allowable line length: under 1000m 2) Remote control cable • Types : 3-core cable 3) Central control cable Product type Wire type...
  • Page 57 Electrical Wiring Wiring of main power supply and equipment capacity 1. Use a separate power supply for the Outdoor Unit and Indoor Unit. 2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections. 3.
  • Page 58 Electrical Wiring Field Wiring 1. 50Hz u Example Connection of Communication Cable n 1 Outdoor Unit-3Ø, 380-415V 3 Phase 4 Wires Power supply 50Hz 380-415V [Outdoor Unit] (Main Switch) R S T N Switch Fuse Power supply 1 Phase 50Hz 220-240V Power Line (4 Wires Cable)
  • Page 59 Electrical Wiring n 2 Outdoor Units-3Ø, 380-415V ■ When the power source is connected In series between the units. 3 Phase 4 Wires Power supply 50Hz 380-415V [Master] [Slave] (Main Switch) R S T N Switch Fuse Power supply 1 Phase 50Hz 220-240V Power Line (4 Wires Cable)
  • Page 60 Electrical Wiring WARNING • Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe). • Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply. •...
  • Page 61 Electrical Wiring n 3 Outdoor Units-3Ø, 380-415V ■ When the power source is connected In series between the units. 3 Phase 4 Wires Power supply 50Hz 380-415V [Master] [Slave1] [Slave2] (Main Switch) R S T N Switch Fuse Power supply 1 Phase 50Hz 220-240V Power Line...
  • Page 62 Electrical Wiring WARNING • Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe). • Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply. •...
  • Page 63 Electrical Wiring n 4 Outdoor Units - 3Ø, 380-415V n When the power source is connected In series between the units. 3 Phase 4 Wires Power supply 50Hz 380-415V [Master] [Slave1] [Slave2] [Slave3] (Main Switch) R S T N Switch Fuse Power supply 1 Phase 50Hz...
  • Page 64 Electrical Wiring WARNING • Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe). • Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply. •...
  • Page 65 Electrical Wiring 2. 60Hz u Example Connection of Communication Cable n 1 Outdoor Unit - 3Ø, 380V 3 Phase 4 Wires Power supply 60Hz 380V [Outdoor Unit] (Main Switch) R S T N Switch Fuse Power supply 1 Phase 60Hz 220V Power Line (4 Wires Cable)
  • Page 66 Electrical Wiring n 2 Outdoor Units - 3Ø, 380V n When the power source is connected In series between the units. 3 Phase 4 Wires Power supply 60Hz 380V [Master] [Slave] (Main Switch) R S T N Switch Fuse Power supply 1 Phase 60Hz 220V Power Line...
  • Page 67 Electrical Wiring WARNING • Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe). • Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply. •...
  • Page 68 Electrical Wiring n 3 Outdoor Units - 3Ø, 380V n When the power source is connected In series between the units. 3 Phase 4 Wires Power supply 60Hz 380V [Master] [Slave1] [Slave2] (Main Switch) R S T N Switch Fuse Power supply 1 Phase 60Hz 220V...
  • Page 69 Electrical Wiring WARNING • Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe). • Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply. •...
  • Page 70 Electrical Wiring n 4 Outdoor Units - 3Ø, 380V n When the power source is connected In series between the units. 3 Phase 4 Wires Power supply 60Hz 380V [Master] [Slave1] [Slave2] [Slave3] (Main Switch) R S T N Switch Fuse Power supply 1 Phase 60Hz...
  • Page 71 Electrical Wiring WARNING • Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe). • Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply. •...
  • Page 72 Electrical Wiring u Example Connection of Communication Cable [BUS type] [STAR type] • Connection of communication cable must be • Abnormal operation can be caused by installed like below figure between indoor unit to communication defect, when connection of outdoor unit. communication cable is installed like below figure(STAR type).
  • Page 73 Electrical Wiring u UX1 Chassis Wire Connection Left Side Right Side Main Power Terminal Block Main Power Terminal Block Main Power Terminal Block Main Power Terminal Block Main Power Terminal Block Main Power Terminal Block Main Power Terminal Block Main Power Terminal Block Power/Ground lines Power/Ground lines Ground Cable...
  • Page 74 Electrical Wiring u UX2 Chassis Wire Connection Left Side Right Side Main Power Terminal Block Main Power Main Power Main Power Main Power Main Power Main Power Terminal Block Terminal Block Terminal Block Terminal Block Terminal Block Terminal Block Power/Ground lines Power/Ground lines Ground Cable Ground Cable...
  • Page 75 Electrical Wiring u UX3 Chassis Wire Connection Right Side Left Side Main Power Terminal Block Main Power Main Power Main Power Main Power Main Power Main Power Terminal Block Terminal Block Terminal Block Terminal Block Terminal Block Terminal Block Power/Ground lines Power/Ground lines Ground Cable Ground Cable...
  • Page 76 Electrical Wiring Location of setting dip switch SW01B SW02B 7 - Segment SW02V (Auto Addressing) Outdoor Unit...
  • Page 77 Electrical Wiring DIP switch setting n Checking according to dip switch setting 1. You can check the setting values of the Master outdoor unit from the 7 segment LED. The dip switch setting should be changed when the power is OFF. 2.
  • Page 78 Electrical Wiring n Setting the DIP switch • Heat pump • If you set the Dip switch when power is on, the changed setting will not be applied immediately. The changed setting will be enabled only when Power is reset or by pressing Reset button. Index 10 11 12 13 14 ●...
  • Page 79 Electrical Wiring • Cooling only • If you set the Dip switch when power is on, the changed setting will not be applied immediately. The changed setting will be enabled only when Power is reset or by pressing Reset button. Index 10 11 12 13 14 ●...
  • Page 80 Electrical Wiring Automatic Addressing • The address of indoor units would be set by auto addressing 1) Wait for 3 minutes after supplying power. SW01B SW02B (Master and Slave outdoor units, indoor units) 2) Press RED button of the outdoor units for 5 7 - Segment seconds.
  • Page 81 Electrical Wiring u The Procedure of Automatic Addressing Power On Waiting 3 minutes Press RED Button for 5 sec. (H/P : SW0B, C/O : SW02V) Auto addressing start 7-segment LED = 88 Don’t press RED Button (H/P : SW0B, C/O : SW02V) •...
  • Page 82 Electrical Wiring Group Number setting Group Number setting for Indoor Units ① Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off. ② The transmission lines connected to INTERNET terminal should be connected to central control of Outdoor Unti with care for their polarity( A ’...
  • Page 83 ❈ Communication line length can be maximum 300m, use communication line as thick as 1.25mm2. Without Cool/Heat Selector Installation and Connection In case, try to set mode without Cool/Heat Selector and try to use other switch except from LG Outdoor Cool/Heat Selector in field.

  • Page 84: Test Run

    LED in outdoor units. Functions of each Test run steps (Use above LG MV 6.1 version if you want to issue integrated test run report) Step 0. Verify the command signals Select function to be executed during the test run Step 1.
  • Page 85 Test Run How to Cope with Test Run Abnormality The phenomena from main component failure Component Phenomenon Cause Check method and Trouble shooting Not operating Motor insulation broken Check resistance between terminals and chassis Strainer clogged Change strainer Compressor Oil leakage Check oil amount after opening oil port Stop during running Motor insulation failure...
  • Page 86 Test Run Sensor Checking Function Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is right or not. 3 indoor temperature sensors, 9 outdoor temperature sensor Note 1) , 2 outdoor pressure sensors. DIP Switch Settings Start - Setting1 (Refrigerant Auto Recharge)
  • Page 87 Test Run Sensor Check Error Code Display In case error occurs during sensor checking process, error display is as shown below. Following contents are displayed one after the other on the main PCB of master outdoor unit. Indoor sensor error : Outdoor sensor error : * 5 number of errors is displayed Displaying error content...
  • Page 88 Test Run Refrigerant Auto Charging (Setting 1) This function charges appropriate amount of refrigerant automatically through cycle operation. It can be used when refrigerant amount Isn't certain because of SVC and leakage. Start Wait for 3 min. after power reset Set the Dip S/W.
  • Page 89 Test Run Liquid Pip Liquid Pipe Liquid Pipe Gas Pip Gas Pipe Gas Pipe manifold Capillary Assembly Procedure 1. Arrange manifold,capillary assembly, refrigerant vessel and scale 2. Connect manifold to the gas pipe service valve of ODU as shown in the figure. 3.
  • Page 90 Test Run Refrigerant Checking Function (Setting 2) This function judges refrigerant leakage and overcharging It can be used with refrigerant auto charging function. Inspection Start Press black button for 2 seconds Display Error Proper Temperature Thermo off indoor unit Decide Refrigerant Quantity Display Error Based on Refrigerant Quantity Press black button for 2 seconds...
  • Page 91 Test Run CAUTION 1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range) IDU : 20 ~ 35 °C ODU : 0 ~ 43 °C 2. Set IDU wired remote controller temperature sensor setting as 'IDU'. 3. Make certain that IDU doesn't run with thermo off mode during operation. [ Error contents about auto refrigerant charging function ] : Temperature Range Error (In case that IDU or ODU is out of range) : System Unstable Error (In case, After 45 min operating the system, it does not be...
  • Page 92 Test Run Integrated Test Running Function_Cooling Mode (Setting 3) This function is checking process for normal operation of parts and system On operating system. • All processes carry out included refrigerant amount judge logic and check normal condition of parts on cooling mode.
  • Page 93 Test Run Integrated Test Running Function_Heating Mode (Setting 4) This function is checking process for normal operation of parts and system On operating system. • All processes carry out included refrigerant amount judge logic and check normal condition of parts on heating mode.
  • Page 94 Test Run CAUTION 1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range) IDU : 20 ~ 35 °C ODU : 0 ~ 43 °C 2. Set IDU wired remote controller temperature sensor setting as 'IDU'. 3. Make certain that IDU doesn't run with thermo off mode during operation. [ Error contents about auto refrigerant charging function ] : Temperature Range Error (In case that IDU or ODU is out of range) : System Unstable Error (In case, After 45 min operating the system, it does not be stable)
  • Page 95 Test Run Night Low Noise Function In cooling mode, this function makes the ODU fan operate at low RPM to reduce the fan noise of ODU at night which has low cooling load. Max. RPM setting method RPM / Time Settings Capacity Set the DIP S/W Heat Pump...
  • Page 96 Test Run Vacuum Mode This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement. Vacuum mode setting method Vacuum mode cancellation method ODU power reset Set the DIP S/W OFF Power reset Set the DIP S/W ON Vacuum mode cancellation Press the black button Main PCB (5 sec.)
  • Page 97 Test Run Static pressure compensation mode This function secures the air flow rate of ODU, in case static pressure has been applied like using duct at discharge of ODU. n Static pressure compensation dip S/W setting method High static pressure mode : Set DIP S/W Static pressure compensation mode cancellation Static pressure compensation mode setting method...
  • Page 98 Test Run Self-Diagnosis Function Error Indicator • This function indicates types of failure in self-diagnosis and occurrence of failure for air condition. • Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of outdoor unit control board as shown in the table.
  • Page 99 Test Run Display Title Cause of Error Master Outdoor Unit Inverter DC charging is not performed at Master Outdoor Unit after starting relay turn on. Compressor DC link Low Voltage Slave1 Outdoor Unit Inverter DC charging is not performed at Slave1 Outdoor Unit Compressor DC link Low Voltage after starting relay turn on.
  • Page 100 Test Run Display Title Cause of Error Master Outdoor Unit Constant Speed System is turned off by Master Outdoor Uunit Constant Speed Compressor2 High Discharge Temperature Compressor2 High Discharge Temperature Slave1 Outdoor Unit Constant Speed System is turned off by Slave1 Outdoor Unit Constant Speed Compressor2 High Discharge Temperature Compressor2 High Discharge Temperature Slave2 Outdoor Unit Constant Speed...
  • Page 101 Test Run Display Title Cause of Error Master Outdoor Unit Inverter Master Outdoor Unit Inverter Compressor CT Sensor Compressor CT Sensor Fault open or short Slave1 Outdoor Unit Inverter Slave1 Outdoor Unit Inverter Compressor CT Sensor Compressor CT Sensor Fault open or short Slave2 Outdoor Unit Inverter Slave2 Outdoor Unit Inverter Compressor CT Sensor...
  • Page 102 Test Run Display Title Cause of Error Master Outdoor Unit Heat Master Outdoor Unit Heat Exchanger Temperature Sensor(Front side) open or short Exchanger Temperature Sensor (Front side) Fault Slave1 Outdoor Unit Heat Slave1 Outdoor Unit Heat Exchanger Temperature Sensor (Front side) open or short Exchanger Temperature Sensor (Front side) Fault Slave2 Outdoor Unit Heat...
  • Page 103 Test Run Display Title Cause of Error Master Outdoor Unit Faulty IPM Master Outdoor Unit IPM Temperature Sensor short/open Temperature Sensor Slave1 Outdoor Unit Faulty IPM Slave1 Outdoor Unit IPM Temperature Sensor Temperature Sensor short/open Slave2 Outdoor Unit IPM Temperature Sensor Slave2 Outdoor Unit Faulty IPM Temperature Sensor short/open...
  • Page 104 Test Run Display Title Cause of Error Inverter PCB EEPROM Error of Access Error of Inverter PCB of Master Outdoor Unit Master Outdoor Unit Inverter PCB EEPROM Error of Access Error of Inverter PCB of Slave1 Outdoor Unit Slave1 Unit Inverter PCB EEPROM Error of Access Error of Inverter PCB of Slave2 Outdoor Unit Slave2 Unit...
  • Page 105 Test Run Display Title Cause of Error Master Outdoor Unit Fan DC Link Master Outdoor Unit Fan DC Link High Voltage Error High Voltage Error Slave1 Outdoor Unit Fan DC Link Slave1 Outdoor Unit Fan DC Link High Voltage Error High Voltage Error Slave2 Outdoor Unit Fan DC Link Slave2 Outdoor Unit Fan DC Link High Voltage Error...
  • Page 106 Test Run Display Title Cause of Error Communication Error Between Failing to receive Slave Unit signal at main PCB of Master Outdoor Unit Master Outdoor Unit and Other Outdoor Unit Communication Error Between Failing to receive master and other Slave Unit signal at main PCB of Slave1 Outdoor Unit Slave1 Outdoor Unit and Other Outdoor Unit...
  • Page 107 Test Run Display Title Cause of Error Master Outdoor Unit Subcooling Master Outdoor Unit Subcooling Outlet Temperature Outlet Temperature Sensor Error Sensor open or short Slave1 Outdoor Unit Subcooling Slave1 Outdoor Unit Subcooling Outlet Temperature Outlet Temperature Sensor Error Sensor open or short 1 1 5 Slave2 Outdoor Unit Subcooling Slave2 Outdoor Unit Subcooling Outlet Temperature...
  • Page 108 Test Run Display Title Cause of Error 1 Master outdoor unit Main Board Main- Master Outdoor Unit Main Board Main-Sub Micom Sub Micom communication error communication failed Slave1 outdoor unit Main Board Main- Slave1 Outdoor Unit Main Board Main-Sub Micom communication failed Sub Micom communication error 1 8 2...

  • Page 109: New Function

    New Function New Function n Multi V III provides as following new functions. New Function Applied item Cooling/ Heating/ Fan Cool/Heat selector (PRDSBM) Cooling/ Heating/ All OFF Solution Accessory Demand control -. Low load operation -. DDC control (DC0~10V Input) ODU Dry contact (PQDSBDCVM0) Solution Accessory ODU Fan Low speed control...
  • Page 110 New Function 1 Cool/ Heat selector 1.1 Cool/ Heat Selector has provided two different functions. - Cooling/ heating/ Fan lock mode - Cooling/ heating/ All OFF mode [Installation] 1. Check the contents of Cool/ Heat Selector ...
  • Page 111 New Function 1.2 ODU Dry contact ODU Dry contact has provided Three different functions. - Demand control - Night Low Noise control - Error Alarm Monitoring function [ODU Dry contact] 1. SWDIP : Switch to select main function - Feature and Parts Naming 2.
  • Page 112 New Function 2. ODU Dry contact with Central controller : With Single Outdoor unit : With Series Outdoor units Multi-V WIRE ASSY 1(1EA) BUS_A Central Control BUS_B Devices CN_OUT Outdoor Unit...
  • Page 113 SW_VOLT2 SW_VOLT1 SW_VOLT2 SW_VOLT1 Notes Do not input the voltage signal in LG does not LG does not "NON VOLT" setting mode otherwise Connect separate supply this section supply this section it will cause serious damage...
  • Page 114 New Function 2. Using Analog signal with DDC Module SW_VOLT2 SW_VOLT1 DC 0~10V input Direct Digital Controller [Control Value] - Using Contact signal Cooling Heating Rotary Volt 100% Step Control Step Control Not-Control Not-Control 100% 100% Comp. System Control Comp OFF Comp OFF Signal Input...
  • Page 115 New Function - Using Analog signal with DDC Module Comp capacity Input_1 Input_2 Input_3 STEP Of outdoor unit(%) 100% No control COMP OFF No control COMP OFF No control Comp. System Control COMP OFF Signal No control Input Step ALL OFF No control ALL OFF No control...
  • Page 116 New Function 2.2 Night Low Noise control ODU Dry contact has provided Two methods for Night Low Noise Control - Automatically operating : Using previous method - Manual operating : Using simple switch and timer [Setting] - For ODU Dry contact Position Function L1 2 3 4...
  • Page 117 New Function 3 Independent power module The main PCB controls the EEV kit when the power is turn on. The independent sub PCB controls the EEV kit when the power is turn off. Concept of independent power module 3 phase 400V “...

  • Page 118: Caution For Refrigerant Leak

    Caution For Refrigerant Leak Caution For Refrigerant Leak The installer and system specialist shall secure safety against leakage according to local regulations or standards. The following standards may be applicable if local regulations are not available. Introduction Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large to such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.
  • Page 119 Caution For Refrigerant Leak (3) With partition and without opening which serve as passage of air to adjoining room Outdoor unit Indoor unit Smallest room n Calculate refrigerant concentration Total amount of replenished In case the result of calculation exceeds refrigerant in refrigerant facility (kg) Refrigerant concentration the limiting concentration, perform the...

  • Page 120: Installation Guide At The Seaside

    3) Select a well-drained place. 1. If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment. 2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water...

This manual is also suitable for:

Multi v aruv seriesMulti v arun120ln3Multi v arun100ln3Multi v arun140ln3Multi v arun180ln3

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