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LG Multi V PLUS II ARUN115BT2 Installation Manual
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LG Multi V PLUS II ARUN115BT2 Installation Manual

LG Multi V PLUS II ARUN115BT2 Installation Manual

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Summary of Contents for LG Multi V PLUS II ARUN115BT2

  • Page 1 This Owner's Manual is provided and hosted by Appliance Factory Parts. LG ARUN115BT2 Owner's Manual Shop genuine replacement parts for LG ARUN115BT2 Find Your LG Air Conditioner Parts - Select From 2328 Models -------- Manual continues below --------...
  • Page 2 website http://www.lgservice.com System Outdoor Unit R410A INSTALLATION MANUAL MODELS: ARUN/ARUV 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 3 IMPORTANT! Please read this instruction sheet completely before installing the product. This air conditioning system meets strict safety and operating standards. As the installer or service person,it is an important part of your job to install or service the system so it operates safely and efficiently.

  • Page 4: Table Of Contents

    ARUV(N) Series Outdoor unit Installation Manual Safety Precautions TABLE OF CONTENTS Safety Precautions......3 Installation Process .....11 Outdoor units Information ..12 Environment-friendly Alternative Refrigerant R410A .......14 Select the Best Location .....14 Installation Space ......15 Lifting method ......19 Installation ........20 Refrigerant piping installation ..22 Electrical Wiring......47 Test Run........66 Caution For Refrigerant Leak ..79...
  • Page 5 Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. I 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 6 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 7 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 8 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 9 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 10 Safety Precautions I 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 11 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 12: Installation Process

    Installation Process 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 13: Outdoor Units Information

    Outdoor Units Information Outdoor units Information CAUTION: Ratio of the connectable Indoor Units to the Outdoor: Within 50 ~ 130% Ratio of the running Indoor Units to the Outdoor: Within 10 ~ 100% A combination operation over 100% cause to reduce the total capacity. Power Supply: Outdoor Unit (3Ø, 460V, 60Hz) I Heat pump Unit...
  • Page 14 Outdoor Units Information Power Supply: Outdoor Unit (3Ø, 208/230V, 60Hz) I Heat pump Unit 1 Outdoor Unit 2 Outdoor Units System 11.0 Model ARUN076BT2 ARUN096BT2 ARUN115BT2 ARUN154BT2 ARUN076BT2 ARUN076BT2 Product Charge kg(lbs) 8(17.6) 8(17.6) 8(17.6) 8+8(17.6+17.6) CF(Correction Factor) kg(lbs) -1(-2.2) 0(0) 1(2.2) -2(-4.4)

  • 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 I Basic space required A space of at least 250mm(9-13/16 inch) is necessary at the back for inlet air. Taking servicing, etc. from the rear into account, a space of about 915mm(36 inches) should be provided, the same as at the front. 915mm(36 inches) or more (Control box is open/close type) 250mm(9-13/16 inch) or more Top discharge (open in principle)
  • Page 17 Installation Space I When unit is surrounded by walls 915mm(36 inches) or more (Control box is of a open/close type) 250mm(9-13/16 inch) or more Rear Side Rear Side Front Side Front Side I 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 space between each block as shown below considering passage for air and people. (Be opened) 915mm(36 inches) or more (control box is of a open/close type) 250mm(9-13/16 inch) or more 150mm(5-7/8 inch) or more Rear Side...
  • Page 19 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 20: 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 21: Installation

    Installation Installation Location of anchor bolt(To be applied to 1, 2 Units installation) I Individual installation Unit: mm(inch) 10(3/8) 900±2 900±2 (35-7/16±1/16) (15-1/16) (35-7/16±1/16) I Collective installation (5-7/8) 10(3/8) 10(3/8) 900±2 900±2 900±2 900±2 (20-15/16) (35-7/16±1/16) (15-1/16) (35-7/16±1/16) (35-7/16±1/16) (15-1/16) (35-7/16±1/16) I Installation foot(Location of anchor bolt) (UW1)
  • 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: Refrigerant Piping Installation

    Refrigerant piping installation Refrigerant piping installation WARNING Always use extreme care to prevent the refrigerant gas (R410A) from leakage while using fire or flame. If the refrigerant gas comes in contact with the flame from any source, such as a gas stove, it breaks down and generates a poisonous gas which can cause gas poisoning.
  • Page 24 Refrigerant piping installation Connection of High/Low Pressure Common pipe Slave Outdoor Unit Master Outdoor Unit 2 outdoor units 1. For the High/Low Pressure Common pipe, connect both Master Outdoor Unit and Slave (1, 2) Outdoor Unit to the pipe (field supply) by using elbows (field supply) 2.
  • Page 25 Refrigerant piping installation Connection of Outdoor units 2 outdoor units Model Unit: mm(inch) Connection of gas pipe Connection of liquid pipe Blow nitrogen Master outdoor while brazing Ø 34.9(1-3/8) Don't cut the pipe less liquid pipe Master outdoor than 70mm(2-3/4inch) Ø...
  • Page 26 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 27 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 28 Refrigerant piping installation Refrigerant piping system N Y branch method 1 Outdoor Units Example : 5 Indoor Units connected : Outdoor Unit : 1st branch (Y branch) : Indoor Units L150m(492ft) (200m(656ft) : Conditional application) l 40m(131ft) (90m(295ft) : Conditional application) 15m(49ft) 2 Outdoor Units Slave...
  • Page 29 Refrigerant piping installation ➲ Refrigerant pipe diameter from branch to branch (B,C,D) Liquid pipe Gas pipe Downward Indoor Unit total capacity [kW(Btu/h)] [mm(inch)] [mm(inch)] <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(1-1/8) < 71(242,300) Ø15.88(5/8) Ø28.58(1-1/8) < 104(354,900) Ø19.05(3/4) Ø34.9(1-3/8) ➲...
  • Page 30 Refrigerant piping installation Header Method 1 Outdoor Unit Example : 6 Indoor Units connected : Outdoor Unit : 1st branch : Indoor Units : Sealed piping L 150m(492ft) 40m(131ft) 15m(49ft) 2 Outdoor Units Slave Example : 6 Indoor Units connected Master : Outdoor Unit : Header branch...
  • Page 31 Refrigerant piping installation ➲ Total pipe length = A+a+b+c+d+e+f ≤ 1,000m(3,281 ft) Longest pipe length * Equivalent pipe length WARNING A+f ≤ 150m(492ft) A+f ≤ 175m(574ft) Longest pipe length after 1st branch Pipe length after header branching f ≤ 40m(131ft) (a~f) Difference in height(Outdoor Unit ↔...
  • Page 32 Refrigerant piping installation N Combination of Y branch/header method Example : 5 Indoor Units connected : Outdoor Unit : 1st branch (Y branch) : Y branch : Indoor Unit : Header : Sealed piping L 150m(492ft) 40m(131ft) Branch pipe can not be used after header Example : 5 Indoor Units connected Slave : Outdoor Unit...
  • Page 33 Refrigerant piping installation ➲ Refrigerant pipe diameter from branch to branch (B,C) Downward Indoor Unit total capacity Liquid pipe Gas pipe [mm(inch)] [mm(inch)] [kW(Btu/h)] <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(1-1/8) < 71(242,300) Ø15.88(5/8) Ø28.58(1-1/8 ) <...
  • Page 34 Refrigerant piping installation N Outdoor unit Connection ➲ Refrigerant pipe diameter before 1st branch (A,E,F) Liquid pipe Gas pipe Upward Outdoor Unit total capacity [HP] [mm(inch)] [mm(inch)] Ø9.52(3/8) Ø19.05(3/4) Ø9.52(3/8) Ø22.2(7/8) 12~16 Ø12.7(1/2) Ø28.58(1-1/8) 18~22 Ø15.88(5/8) Ø28.58(1-1/8) Ø15.88(5/8) Ø34.9(1-3/8 26~32 Ø19.05(3/4) Ø34.9(1-3/8) * High/Low Pressure Common Pipe: Ø19.05(3/4 inch)(18HP or more)
  • Page 35 Refrigerant piping installation WARNING When the equivalent length between the outdoor unit and a indoor unit is 90 m(295 ft) or more, the size of main pipes (Liquid pipe and Gas pipe) must be increased one grade. Gas pipe Liquid pipe 8HP ........Ø19.05(3/4 inch) ¡...
  • Page 36 Refrigerant piping installation Connection between outdoor and outdoor unit I Example of Pipe Connection between Outdoor 1. Pipe Connection between Outdoors Differnce in height between outdoor units Less than 5m(16ft)( h1 ≤ 5m(16ft)). Longest Pipe Length between Outdoors Less than 10m(32.8ft), after 1st branch. Less than 10m(32.8ft) CAUTION Apply oil trap between outdoor unit installed Higher level and outdoor unit installed lower level.
  • Page 37 Refrigerant piping installation 3. In case pipe length between outdoors is 2m or more. When the piping length between Branch of Outdoor units or between Branch and outdoor units. Is 2 m(6.6ft) or more, prepare a oil trap 200 mm(0.7ft) or more as shown below) on the gas pipe line location. Less than 2 m(6.6ft) from branch.
  • Page 38 Refrigerant piping installation N The amount of Refrigerant The calculation of the additional charge should take into account the length of pipe. Product Charge(kg(lb)) Additional charge (kg(lb)) 10HP a : ø6.35(1/4), 10m(32.8ft) Outdoor Unit x 0.354(kg/m) ¡ 0.237 lb/ft Total liquid pipe (m(ft.)): Ø22.2mm(7/8inch) b : ø6.35(1/4), 10m(32.8ft) Indoor Unit c : ø6.35(1/4), 10m(32.8ft)
  • Page 39 Refrigerant piping installation 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 3. The others Slave Slave Master...
  • Page 40 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 41 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 42 Refrigerant piping installation N Y branch pipe [Unit:mm(inch)] Models Gas pipe Liquid pipe ARBLN01620 ARBLN03320 ARBLN07120 ARBLN14520 Installation Manual 41...
  • Page 43 Refrigerant piping installation N Header [Unit:mm(inch)] Models Gas pipe Liquid pipe I.D Ø12.7(1/2) I.D Ø12.7(1/2) I.D Ø6.35(1/4) I.D Ø6.35(1/4) I.D Ø15.88(5/8) I.D Ø15.88(5/8) I.D Ø9.52(3/8) I.D Ø9.52(3/8) 4 branch I.D Ø12.7(1/2) I.D Ø19.05(3/4) ARBL054 I.D Ø12.7(1/2) O.D Ø19.05(3/4) O.D Ø12.7(1/2) I.D Ø9.52(3/8) I.D Ø15.88(5/8) I.D Ø9.52(3/8) I.D Ø12.7(1/2)
  • Page 44 Refrigerant piping installation Leak Test and Vacuum drying (1) Leak test Leak test should be made by pressurizing nitrogen gas to 551.1 psi. 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 45 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 46 Refrigerant piping installation Vacuum Mode This function is used for creating vacuum in the system after compressor replacement, ODU parts replace- ment or IDU addition/replacement. Vacuum mode setting method Vacuum mode cancellation method Main PCB ODU power reset Master main PCB DIP switch OFF( No.11,14) SW01S Main PCB Power reset...
  • Page 47 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 48: 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 49 Electrical Wiring Outdoor Unit Outdoor Unit Indoor Indoor Indoor Indoor Unit Unit Unit Unit Remote Remote Remote Remote controller controller controller controller Outdoor Unit Outdoor Unit Indoor Indoor Indoor Indoor Unit Unit Unit Unit Remote Remote Remote Remote controller controller controller controller 2-Core Shield Cable...
  • Page 50 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 communication line between master and slave outdoor unit through the terminal block. - Connect communication lines between outdoor unit and indoor units through the terminal block.
  • Page 51 Electrical Wiring Transmission and Power Lines 1) Communication cable • Types : shielding wire •Use wires of size : over 1.25mm • Maximum allowable temperature: 60°C • Maximum allowable line length: under 1,000m(3,281ft) 2) Remote control cable • Types : 3-core cable 3) Simple central control cable •...
  • Page 52 Electrical Wiring N 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 53 Electrical Wiring 5.1 60Hz N Example Connection of Transmission Cable I 1 Outdoor Unit - 3Ø, 460V 3 Phase 3 Wires Power line(R, S, T) Communication line (3 line): Wired remote control Single Phase of power supply line(L, N) Power supply switch Communication line (2 shield line): Between Indoor Unit and Outdoor Unit (Switch fuse : ELCB) 3 Phase 3 Wires...
  • Page 54 Electrical Wiring I 2 Outdoor Units - 3Ø, 460V Master 3 Phase 3 Wires Power line(R, S, T) I When the power source is connected Slave In series between the units. Communication line (3 line): Wired remote control Single Phase of power supply line(L, N) Power supply switch Communication line (2 shield line): (Switch fuse : ELCB)
  • Page 55 Electrical Wiring I 1 Outdoor Unit - 3Ø, 208/230V 3 Phase 3 Wires Power line(R, S, T) Communication line (3 line): Wired remote control Single Phase of power supply line(L, N) Power supply switch (Switch fuse : ELCB) Communication line (2 shield line): Between Indoor Unit and Outdoor Unit 3 Phase 3 Wires Power supply 60Hz 208/230V...
  • Page 56 Electrical Wiring I 2 Outdoor Units - 3Ø, 208/230V Master 3 Phase 3 Wires Power line(R, S, T) I When the power source is connected In series between the units. Slave Communication line (3 line): Wired remote control Single Phase of power supply line(L, N) Communication line (2 shield line): Power supply switch Between Outdoor Unit and Outdoor Unit...
  • Page 57 Electrical Wiring Connect the cable to the outdoor unit 1. Remove the control box cover from the unit. Connect the wires to the terminals on the control box as following. 2. Secure the cable onto the control box with the holder 3.
  • Page 58 Electrical Wiring Connection method of the connecting cable (Example) 1. Make a hole appropriate for the passage of connection cable through on cap by tool. 2. After knocking out the holes, we recommend you paint the edges and areas around the edges using the repair paint to prevent rusting 3.
  • Page 59 Electrical Wiring Location of setting Switch Main PCB SW01B SW02B (DIP S/W) (DIP S/W) 7 - Segment SW02V Auto addressing Outdoor Unit Outdoor Unit...
  • 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. The dip switch setting should be changed when the power is OFF. 2.
  • Page 61 Electrical Wiring I 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 Function Function SW01B Setting SW01B Setting SW02B Setting SW02B Setting Remarks Remarks Dry Contact Dry Contact 9 10 11 12 13 14 9 10 11 12 13 14 Snow Snow 9 10 11 12 13 14 9 10 11 12 13 14 Forced Forced Defrosting...
  • Page 63 Electrical Wiring 2. Settings of slave outdoor unit Function Function SW01B Setting SW01B Setting SW02B Setting SW02B Setting Remarks Remarks Slave 1 Slave 1 9 10 11 12 13 14 9 10 11 12 13 14 Slave 2 Slave 2 9 10 11 12 13 14 9 10 11 12 13 14 Slave 3...
  • Page 64 Electrical Wiring Automatic Addressing • The address of indoor units would be set by auto SW01B SW02B addressing (DIP S/W) (DIP S/W) 1) Wait for 3 minutes after applying power supply (main and sub outdoor unit, indoor unit). 7 - Segment 2) Press the switch of the outdoor unit (SW02V) for 5 SW02V Auto addressing...
  • Page 65 Electrical Wiring Group Number setting Group Number setting for Indoor Units Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off. The communication lines connected to INTERNET terminal should be connected to central control of Outdoor unti with care for their polarity( A ¡...
  • Page 66 Electrical Wiring Outdoor unit Dry Contact installation and connection • Connect wires as below figure at the hole of backside of Outdoor Unit Dry Contact. • Insert the wire in the connection hole pushing the "Push" button. Mode Change Air circulation Outdoor Unit Heating Cooling...

  • Page 67: 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 68 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 69 Test Run Sensor Checking Function Note 1) 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 sensors, 2 outdoor pressure sensors. It is used for judging sensor abnormality. Note 2) Note 1.
  • Page 70 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 71 Test Run Refrigerant Checking Function 1. This function charges appropriate amount of refrigerant automatically through cycle operation. 2. This function judges refrigerant leakage and overcharging. 3. It can be used with refrigerant auto charging function. Start Note 1. In case air temperature is out of guaranteed Main temperature, refrigerant checking function may end Wait for 3 min.
  • Page 72 Test Run CAUTION 1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range) IDU : 20(68˚F)~32°C(90˚F) (buffer 2°F) ODU : 10(50˚F)~38°C(100˚F) (buffer 2°F) 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 73 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 Master ODU Dip S/W No.12+14 ON SW01B Master ODU Main PCB Power Reset...
  • Page 74 Test Run Vacuum Mode This function is used for creating vacuum in the system after compressor replacement, ODU parts replace- ment or IDU addition/replacement. Vacuum mode setting method Vacuum mode cancellation method Main PCB ODU power reset Master main PCB DIP switch OFF( No.11,14) SW01S Main PCB Power reset...
  • Page 75 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 76 Test Run Display Title Cause of Error Master Outdoor Unit Input Voltage Master Outdoor Unit input voltage is over 487V or High/ Low Voltage below 270V slave Outdoor Unit Input Voltage slave Outdoor Unit input voltage is over 487V or below High/ Low Voltage 270V Master Outdoor Unit Inverter...
  • Page 77 Test Run Display Title Cause of Error Master Outdoor Unit High Master Outdoor Unit High Pressure Sensor open or Pressure Sensor Fault short slave Outdoor Unit High Pressure slave Outdoor Unit High Pressure Sensor open or Sensor Fault short Master Outdoor Unit Air Master Outdoor Unit Air Temperature Sensor open or Temperature Sensor Fault short...
  • Page 78 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 slave Outdoor Unit slave Unit Master Outdoor Unit Fan Lock Restriction of Master Outdoor Unit slave Outdoor Unit Fan Lock...
  • Page 79 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 1 0 4 Failing to receive master and other Slave Unit signal at Communication Error Between slave Outdoor Unit and Other main PCB of slave outdoor unit...

  • Page 80: 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 81 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 I Calculate refrigerant concentration Total amount of replenished In case the result of calculation exceeds refrigerant in refrigerant facility (lb) Refrigerant concentration the limiting concentration, perform the...

  • Page 82: 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 83 Memo Outdoor Unit Outdoor Unit...
  • Page 84 P/No.: MFL46912303 Printed in Korea After reading this manual, keep it in a place easily accessible to the user for future reference.

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