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LG MULTI V PLUS ARUV Series Installation Manual
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LG MULTI V PLUS ARUV Series Installation Manual

LG MULTI V PLUS ARUV Series Installation Manual

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Outdoor Unit
INSTALLATION MANUAL
MODELS: ARUV Series
ARUN Series
website http://www.lgservice.com
System
R410A
IMPORTANT
• 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.
LG

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Summary of Contents for LG MULTI V PLUS ARUV Series

  • Page 1 website http://www.lgservice.com System Outdoor Unit R410A INSTALLATION MANUAL MODELS: ARUV Series ARUN Series IMPORTANT • 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.

  • Page 2: Table Of Contents

    ARUV(N) Series Outdoor unit Installation Manual TABLE OF CONTENTS Safety Precautions......3 Installation Process .....10 Outdoor units Information ..11 Environment-friendly Alternative Refrigerant R410A .......15 Select the Best Location .....15 Installation Space ......16 Lifting method ......20 Installation ........21 Refrigerant piping installation ..26 Electrical Wiring......46 Test Run........68 Caution For Refrigerant Leak ..76...

  • 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. 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 For re-installation of the installed product, Do not install, remove, or re-install the unit always contact a dealer or an Authorized by yourself (customer). Service Center. • There is risk of fire, electric shock, explosion, or • There is risk of fire, electric shock, explosion, or injury.
  • Page 5 Safety Precautions Ventilate before operating air conditioner Securely install the cover of control box and when gas leaked out. the panel. • It may cause explosion, fire, and burn. • If the cover and panel are not installed securely, dust or water may enter the outdoor unit and fire or electric shock may result.
  • Page 6 Safety Precautions When the product is soaked (flooded or Be cautious not to touch the sharp edges submerged), contact an Authorized Service when installing. Center. • There is risk of fire or electric shock. • It may cause injury. Take care to ensure that nobody could step Do not open the inlet grille of the product on or fall onto the outdoor unit.
  • Page 7 Safety Precautions Use power cables of sufficient current Do not use the product for special purposes, carrying capacity and rating. such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system. • Cables that are too small may leak, generate •...
  • Page 8 Safety Precautions Operation Do not use the air conditioner in special Do not block the inlet or outlet. environments. • Oil, steam, sulfuric smoke, etc. can significantly • It may cause failure of appliance or accident. reduce the performance of the air conditioner or damage its parts.
  • Page 9 Safety Precautions Safely dispose of the packing materials. Turn on the power at least 6 hours before starting operation. • Packing materials, such as nails and other metal or • Starting operation immediately after turning on wooden parts, may cause stabs or other injuries. the main power switch can result in severe •...

  • Page 10: Installation Process

    Installation Installation Process Indicate clearly who is to be responsible for switch settings Determination of division work Make relationship between outdoor, indoor, remote controller, and option connections clear. Preparation of contract drawings (Prepare control circuit diagram) Take account of gradient The foundation must be level even Sleeve and insert work Outdoor unit foundation work...

  • Page 11: Outdoor Units Information

    Outdoor units Information Outdoor units Information CAUTION: A ratio of the connectable Indoor Units with the Outdoor: Within 50 ~ 130% A ratio of the running Indoor Units with the Outdoor: Within 10 ~ 100% 130% combination ratio is a reduction in capacity in defrost Power Supply: Outdoor Unit (3Ø, 380 ~ 415V, 50Hz) Cooling Only Unit...
  • Page 12 Outdoor Units Information Heat Pump Unit 1 Outdoor Unit(Half size) 1 Outdoor Unit System(HP) Model ARUN508T1 ARUN608T1 ARUN808T1 ARUN1008T1 ARUN1208T1 ARUN1408T1 Product Charge CF(Correction Factor) Max. Connectable No. of Indoor Units Net Weight 330.7 330.7 661.4 661.4 661.4 661.4 Dimensions (W*H*D) 806 * 1607 * 730 806 * 1607 * 730 1280 * 1607 * 730...
  • Page 13 Outdoor Units Information Power Supply: Outdoor unit (3Ø, 380V, 60Hz) Cooling Only Unit 1 outdoor unit(half size) 1 outdoor unit System(HP) Model ARUV509T1 ARUV609T1 ARUV809T1 ARUV1009T1 ARUV1209T1 ARUV1409T1 Product Charge CF(Correction Factor) Max. Connectable No. of Indoor Units Net Weight 330.7 330.7 330.7...
  • Page 14 Outdoor Units Information Heat Pump Unit 1 outdoor unit(half size) 1 outdoor unit System(HP) Model ARUN509T1 ARUN609T1 ARUN809T1 ARUN1009T1 ARUN1209T1 ARUN1409T1 Product Charge CF(Correction Factor) Max. Connectable No. of Indoor Units Net Weight 330.7 330.7 330.7 661.4 661.4 661.4 Dimensions (W*H*D) 806 * 1607 * 730 806 * 1607 * 730 1280 * 1607 * 730 1280 * 1607 * 730 1280 * 1607 * 730 1280 * 1607 * 730 inch 31.7 * 63.3 * 28.74...

  • Page 15: 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 character- istic 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 16: Installation Space

    Installation Space Installation Space Individual Installation Basic space required A space of at least 250 mm is necessary at the back for inlet air. Taking servicing, etc. from the rear into account, a space of about 900 mm should be provided, the same as at the front. 250 mm or more Rear Side Rear Side...
  • Page 17 Installation Space When unit is surrounded by walls 900 mm or more (Control box is of a open/close type) 250 mm or more Rear Side Rear Side Front Side Front Side Rear Side Rear Side Front Side Front Side When there is an obstruction above the unit 45°...
  • Page 18 Installation Space Collective / Continuous installation Space required for collective installation and continuous installation:When installing several units, leave the space between each block as shown below considering passage for air and people. (Be opened) 900mm or more (control box is of a open/close type) 250 mm or more Rear Side Rear Side...
  • Page 19 Installation Space Cautions in winter especially for seasonal wind • Sufficient measures are required at 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 area. •...

  • Page 20: Lifting Method

    Lifting Method Lifting method • When carrying the unit suspended, 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 21: Installation

    Installation Installation Location of anchor bolt Individual installation Example of collective installation Installation foot (Location of anchor bolt) Half size Installation Manual 21...
  • Page 22 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 23 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. Use the accessory piping kit or the pipes purchased Copper Slanted Uneven Rough locally.
  • Page 24 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 25 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 26: Refrigerant Piping Installation

    Refrigerant piping installation Refrigerant piping installation The method of connection consists of flare connections at the indoor units, flange connections for the piping of the outdoor unit and flare connections for the liquid piping. Note that the branched sections are brazed. WARNING Always use extreme care to prevent the refrigerant gas (R410A) from the leakage while using fire or flame.
  • Page 27 Refrigerant piping installation Connection of High/Low Pressure Common pipe Sub2 Outdoor Unit Outdoor Unit Sub1 Outdoor Main Main Unit Outdoor Unit Outdoor Unit 2 outdoor units 3 outdoor units 1. For the high/low pressure common pipe, connect both main outdoor unit and sub outdoor units to the pipe (field sup- ply) by using elbows (field supply) 2.
  • Page 28 Refrigerant piping installation Connection of Outdoor units 2 outdoor units Model Connection of gas pipe Connection of liquid pipe Blow nitrogen Main outdoor while brazing Don't cut the pipe less liquid pipe Ø 34.9 Main outdoor than 70mm Ø 12.7 Ø...
  • Page 29 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 30 Refrigerant piping installation 12. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling perfor- mance, 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 31 Refrigerant piping installation Refrigerant piping system Y branch method Example : 5 indoor units connected : Outdoor unit : 1st branch (Y branch) : Indoor units L150m l 40m Example : 5 indoor units connected : Outdoor unit : 1st branch (Y branch) : indoor units 10m or less...
  • Page 32 Refrigerant piping installation 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(54,600) Ø9.52(3/8) Ø15.88(5/8) <22.4(76,400) Ø9.52(3/8) Ø19.05(3/4) < 33(112,600) Ø9.52(3/8) Ø22.2(7/8) < 47(160,400) Ø12.7(1/2) Ø28.58(1 <...
  • Page 33 Refrigerant piping installation Header Method Example : 6 indoor units connected : Outdoor unit : 1st branch : Indoor units : Sealed piping L150m Example : 6 indoor units connected : Outdoor unit : 1st branch : Indoor unit : Sealed piping 10m or less : Connection branch pipe...
  • Page 34 Refrigerant piping installation Combination of Y branch/header method Example : 5 indoor units connected : Outdoor unit : 1st branch (Y branch) : Y branch : Indoor unit : Header : Sealed piping L150m Branch pipe can not be used after header Example : 5 indoor units connected : Outdoor unit : 1st branch...
  • Page 35 Refrigerant piping installation 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(54,600) Ø9.52(3/8) Ø15.88(5/8) <22.4(76,400) Ø9.52(3/8) Ø19.05(3/4) < 33(112,600) Ø9.52(3/8) Ø22.2(7/8) < 47(160,400) Ø12.7(1/2) Ø28.58(1 <...
  • Page 36 Refrigerant piping installation Outdoor unit Connection Refrigerant pipe diameter before 1st branch (A,E,F) Liquid pipe Gas pipe Upward outdoor unit total capacity [mm(inch)] [mm(inch)] [HP] Ø9.52(3/8) Ø15.88(5/8) 6, 8 Ø9.52(3/8) Ø19.05(3/4) Ø9.52(3/8) Ø22.2(7/8) 12~16 Ø12.7(1/2) Ø28.58(1 18~22 Ø15.88(5/8) Ø28.58(1 Ø15.88(5/8) Ø34.9(1 26~34 Ø19.05(3/4)
  • Page 37 Refrigerant piping installation The Amount of Refrigerant The calculation of the additional charge should take account of the length of pipe. Product charge(kg) 10HP Additional charge (kg) Total liquid pipe (m): Ø22.2mm x 0.354(kg/m) x 0.266(kg/m) Total liquid pipe (m): Ø19.05mm x 0.173(kg/m) Total liquid pipe (m): Ø15.88mm x 0.118(kg/m)
  • Page 38 Refrigerant piping installation Distribution Method 1. Line Distribution With line distribution method, it is possible to make the first and the second main pipe distribution within the third branch. Do not make the third main pipe distribution. Do not make the main pipe distribution at or after fourth branch.
  • Page 39 Refrigerant piping installation 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° Viewed from point A in direction of arrow Within ±...
  • Page 40 Refrigerant piping installation • 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 41 Refrigerant piping installation Y branch pipe [unit:mm] Models Gas pipe Liquid pipe Ø12.7 Ø6.35 Ø15.88 Ø9.52 Ø19.05 Ø12.7 Ø15.88 Ø9.52 ARBLN01620 ~ under 16.0 kW Ø12.7 Ø6.35 Ø15.88 Ø9.52 Ø6.35 Ø19.05 Ø22.2 Ø9.52 Ø12.7 Ø22.2 Ø9.52 Ø19.05 Ø15.88 ARBLN03320 Ø12.7 Ø6.35 ~ under 33.0kW Ø15.88...
  • Page 42 Refrigerant piping installation Header [unit:mm] Models Gas pipe Liquid pipe Ø12.7 Ø12.7 Ø6.35 Ø6.35 Ø15.88 Ø15.88 4 branch Ø9.52 Ø9.52 Ø12.7 Ø19.05 ARBL054 OD19.05 Ø15.88 Ø12.7 OD12.7 Ø9.52 Ø12.7 Ø15.88 Ø12.7 Ø9.52 Ø6.35 Ø9.52 Ø6.35 Ø15.88 7 branch Ø12.7 Ø19.05 ARBL057 OD19.05 Ø15.88 Ø12.7 OD12.7...
  • Page 43 Refrigerant piping installation 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 44 Refrigerant piping installation (2) Vacuum Vacuum drying should be made from the service port provided on the outdoor unit’s service valve to the vac- uum 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 45 Refrigerant piping installation 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 46: Electrical Wiring

    Electrical Wiring Electrical Wiring Areas of 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 electric engineers do electric work using special circuits in accordance with regulations and this installation manual.
  • Page 47 Electrical Wiring Outdoor Unit Outdoor Unit Indoor Indoor Indoor Indoor Unit Unit Unit Unit Remote Remote Remote Remote control control control control Outdoor Unit Outdoor Unit Indoor Indoor Indoor Indoor Unit Unit Unit Unit Remote Remote Remote Remote control control control control 2-Core Shield Cable...
  • Page 48 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 49 Electrical Wiring Transmission and Power Lines 1) Transmission cable • Types : shielding wire CVVS or CPEVS • Diameter : over 0.75mm • Insulation material : PVC • Maximum allowable temperature: 60°C • Maximum allowable line length: under 220m 2) Remote control cable •...
  • Page 50 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 proceed- ing with the wiring and connections. 3.
  • Page 51 Electrical Wiring Example Connection of Transmission Cable 1 Outdoor unit(Half size) 3 phase 4 wires power line(R, S, T, N) Transmission line (3 line): wired remote control Single phase of power supply line(L, N) Power supply switch Transmission line (2 shield line): between indoor unit and outdoor unit (switch fuse) 3 phase 4 wires power supply...
  • Page 52 Electrical Wiring Example Connection of Transmission Cable 1 Outdoor unit 3 phase 4 wires power line(R, S, T, N) Transmission line (3 line): wired remote control Single phase of power supply line(L, N) Power supply switch Transmission line (2 shield line): between indoor unit and outdoor unit (switch fuse) 3 phase 4 wires power supply...
  • Page 53 Electrical Wiring Example Connection of Transmission Cable 2 Outdoor units 3 phase 4 wires power line(R, S, T, N) Main Transmission line (3 line): wired remote control Single phase of power supply line(L, N) Transmission line (2 shield line): Power supply switch between outdoor unit and outdoor unit (switch fuse) Transmission line (2 shield line):...
  • Page 54 Electrical Wiring Example Connection of Transmission Cable 3 outdoor units Main 3 phase 4 wires power line(R, S, T, N) Sub1 Transmission line (3 line): wired remote control Sub2 Single phase of power supply line(L,N) Transmission line (2 shield line): Power supply switch between outdoor unit and outdoor unit (switch fuse)
  • Page 55 Electrical Wiring Example Connection of Transmission Cable 1 Outdoor unit(Half size) 3 phase 4 wires power line(R, S, T, N) Transmission line (3 line): wired remote control Single phase of power supply line(L, N) Power supply switch Transmission line (2 shield line): between indoor unit and outdoor unit (switch fuse) 3 phase 4 wires power supply...
  • Page 56 Example Connection of Transmission Cable 2 Outdoor units 3 phase 4 wires power line(R, S, T, N) Main Transmission line (3 line): wired remote control Single phase of power supply line(L, N) Transmission line (2 shield line): Power supply switch between outdoor unit and outdoor unit (switch fuse) Transmission line (2 shield line):...
  • Page 57 Electrical Wiring Example Connection of Transmission Cable 3 Outdoor units Main 3 phase 4 wires power line(R, S, T, N) Sub1 Transmission line (3 line): wired remote control Sub2 Single phase of power supply line(L, N) Transmission line (2 shield line): Power supply switch between outdoor unit and outdoor unit (switch fuse)
  • Page 58 Electrical Wiring Example Connection of Transmission Cable 3 Outdoor units Main 3 phase 4 wires power line(R, S, T, N) Sub1 Transmission line (3 line): wired remote control Sub2 Single phase of power supply line(L, N) Transmission line (2 shield line): Power supply switch between outdoor unit and outdoor unit (switch fuse)
  • Page 59 Electrical Wiring Location of setting Switch Main PCB 7 Segments (Shows setting status) SW03M (DIP switch) Sub Unit PCB (Shows setting status) SW03M (DIP switch) Installation Manual 59...
  • Page 60 Electrical Wiring DIP switch setting I Checking according to dip switch setting 1. You can check the setting values of the main outdoor unit from the 7 segment LED and those of the sub outdoor unit from the LED. The dip switch setting should be changed when the power is OFF. 2.
  • Page 61 Electrical Wiring Setting the DIP switch (SW03M) • Set the dip switch with the power turned off. If you change the setting when the power is on, the changed setting is not applied immediately. The changed setting is applied at the moment that the power is on.
  • Page 62 Electrical Wiring 7) Mode locking: Cooling mode locking Setting before applying the power 8) Mode locking: Heating mode locking Setting before applying the power 9) Backup operation: constant speed comp. backup Setting before applying the power Set at the unit of the constant speed comp.1 failure.
  • Page 63 Electrical Wiring 2. Settings of sub outdoor unit 1) The sequence of sub unit : 1 sub unit At the 1 sub unit, set dip switch as the left side. Setting before applying the power. 2) The sequence of sub unit : 2 sub unit At the 2 sub unit, set dip switch as...
  • Page 64 Electrical Wiring Test Run The test operation starts automatically by operating the DIP switch and buttons in the main unit as follows. (1) Turn on the system and several numbers will be displayed. After about 40 sec, turn on the Dip switch No.7, 8. turn on the No. 1 Dip switch for cooling test and No.
  • Page 65 Electrical Wiring The Procedure of Automatic Addressing Power On Waiting 3 minutes LED 01K blinking? Check outdoor PCB Press SW02M for 5 sec. Auto addressing start 7segment LED • Auto addressing setting end Waiting about 15 minutes Numbers of indoor unit connection set whose addressing is completed are indicated for 30seconds on 7-segment LED after completing setting Check the connections...
  • Page 66 Electrical Wiring Installation of Simple Central Controller Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off. The transmission lines connected to C, D of simple central controller should be connected to C,D terminal port for central control of Outdoor Unit with care for their polarity (C C, D Both the DC power (Vcc) and the GND connect the simple central controller according to the polarity of Vcc terminal and GND.
  • Page 67 Electrical Wiring Group Number Setting of Indoor Units • Using the wired remote controller 1. Press Program button and Set/Clr button at the same time for 3 seconds. 2. The current group and the indoor unit numbers are indicated on the "88" of the wired remote control. 3.

  • Page 68: Test Run

    Test Run Test Run Checks Before Test Run Check to see whether there is any refrigerant leakage, and slack of power or transmission cable. Confirm that 500 V megger shows 2.0 MΩ or more between power supply terminal block and ground. Do not operate in the case of 2.0 MΩ...
  • Page 69 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 Stop during running Motor insulation failure Check resistance between terminals and Compressor chassis...
  • Page 70 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 71 Test Run Display Title Cause of Error Current sensor of inverter compressor Current sensor of inverter compressor is open or short Discharge temperature sensor of Discharge temperature sensor of inverter compressor is open or short inverter compressor Low pressure sensor of main outdoor Low pressure sensor of main outdoor unit is open or short unit High pressure sensor of main outdoor unit is open or short...
  • Page 72 Test Run Display Title Cause of Error Discharge temperature of constant System is off by excessive increase of discharge tempera- ture of constant speed compressor 1 of sub1 outdoor unit speed compressor 1 of sub1 outdoor unit Discharge temperature of constant System is off by excessive increase of discharge tempera- ture of constant speed compressor 2 of sub1 outdoor unit speed compressor 2 of sub1 outdoor...
  • Page 73 Test Run Display Title Cause of Error Temperature sensor of rear-side heat Temperature sensor of rear-side heat exchanger of sub1 unit exchanger of sub1 outdoor unit is open or short Liquid pipe temperature sensor of Liquid pipe temperature sensor of sub1 outdoor unit is open sub1 outdoor unit or short Subcooling inlet temperature sensor of...
  • Page 74 Test Run Display Title Cause of Error Voltage detection circuit of sub1 out- Voltage detection circuit of sub1 outdoor unit is out of door unit order Low/high voltage of sub2 outdoor Input voltage of sub2 outdoor unit is more than 487V or unit less than 270V Voltage detection circuit of sub2 out-...
  • Page 75 Test Run Position of the LED01Y in inverter board Installation Manual 75...

  • Page 76: 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 77 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 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 Capacity of smallest room where...

  • Page 78: 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...
  • Page 79 P/No.: 3828A24002G Printed in Korea After reading this manual, keep it in a place easily accessible to the user for future reference.

This manual is also suitable for:

Multi v plus arun seriesMulti v plus aruv508t1Multi v plus aruv608t1Multi v plus aruv808t1Multi v plus aruv1008t1Multi v plus aruv1208t1 ... Show all

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