LG MULTI V PLUS LRUV Series Installation Manual
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LG MULTI V PLUS LRUV Series Installation Manual

LG MULTI V PLUS LRUV Series Installation Manual

Outdoor unit
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Outdoor Unit
INSTALLATION MANUAL
MODELS: LRUV Series
LRUN Series
website http://www.lgservice.com
System
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 LRUV Series

  • Page 1 website http://www.lgservice.com System Outdoor Unit INSTALLATION MANUAL MODELS: LRUV Series LRUN 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

    LRUV(N) Series Outdoor Unit Installation Manual TABLE OF CONTENTS Safety Precautions......3 Installation Process .....10 Outdoor Units Information ..11 Select the Best Location .....16 Installation Space ......17 Lifting method ......21 Installation ........22 Refrigerant piping installation ..26 Electrical Wiring......52 Test Run........71 Caution For Refrigerant Leak ..79 Outdoor Unit...

  • 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. 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 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 grill of the product dur- 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 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 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 Sleeve and insert work Outdoor unit foundation work...

  • Page 11: Outdoor Units Information

    Outdoor Units Information Outdoor Units Information CAUTION: A ratio of the running Indoor Units with the Outdoor: Within 10 ~ 100% A ratio of the connectable Indoor Units with the Outdoor Unit : within 50 ~ 130% 130% combination ratio is a reduction in capacity in defrost Power Supply: Outdoor Unit (3Ø, 380 ~ 415V, 50Hz) I Cooling Only Unit...
  • Page 12 Outdoor Units Information I Heat Pump Unit 1 Outdoor Unit(Half size) 1 Outdoor Unit System(HP) Model LRUN508T1 LRUN608T1 LRUN808T1 LRUN1008T1 LRUN1208T1 LRUN1408T1 Product Charge CF(Correction Factor) Max. Connectable No. of Indoor Units Net Weight kg(lbs) 150(330.7) 150(330.7) 300(661.4) 300(661.4) 300(661.4) 300(661.4) 806 x 1607 x 730 806 x 1607 x 730...
  • Page 13 Outdoor Units Information Power Supply: Outdoor Unit (3Ø, 380V, 60Hz) I Cooling Only Unit 1 Outdoor Unit(Half size) 1 Outdoor Unit System(HP) Model LRUV509T1 LRUV609T1 LRUV809T1S LRUV1009T1 LRUV1209T1 LRUV1409T1 Product Charge CF(Correction Factor) Max. Connectable No. of Indoor Units Net Weight kg(lbs) 150(330.7) 150(330.7)
  • Page 14 Outdoor Units Information I Heat Pump Unit 1 Outdoor Unit(Half size) 1 Outdoor Unit System(HP) Model LRUN509T1 LRUN609T1 LRUN809T1 LRUN1009T1 LRUN1209T1 LRUN1409T1 Product Charge CF(Correction Factor) Max. Connectable No. of Indoor Units Net Weight kg(lbs) 150(330.7) 150(330.7) 300(661.4) 300(661.4) 300(661.4) 300(661.4) 806 x 1607 x 730 806 x 1607 x 730 1280 x 1607 x 730 1280 x 1607 x 730 1280 x 1607 x 730 1280 x 1607 x 730 Dimensions (W x H x D)
  • Page 15 Outdoor Units Information Power Supply: Outdoor Unit (3Ø, 220V, 60Hz) I Cooling Only Unit 1 Outdoor Unit 2 Outdoor Unit System(HP) Model LRUV80BT1 LRUV100BT1 LRUV120BT1 LRUV80BT1 LRUV100BT1 LRUV100BT1 LRUC80BT1 LRUC80BT1 LRUC100BT1 Product Charge CF(Correction Factor) Max. Connectable No. of Indoor Units Net Weight kg(lbs) 300(661.4)

  • Page 16: Select The Best Location

    Select the Best Location Select the Best Location Select space for installing Outdoor Unit, which will meet the following conditions: • No direct thermal radiation from other heat sources • No possibility of annoying the neighbors by noise from unit •...

  • Page 17: Installation Space

    Installation Space Installation Space Individual Installation I 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 18 Installation Space I 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 I When there is an obstruction above the unit 45°...
  • Page 19 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 20 Lifting Method Seasonal wind and cautions in winter • 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 21: 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 22: Installation

    Installation Installation Location of anchor bolt I Individual installation I Example of collective installation I Installation foot (Location of anchor bolt) Half size Outdoor Unit...
  • Page 23 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 24 Appendix 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. I Use the accessory piping kit or the pipes purchased Copper Slanted Uneven Rough locally.
  • Page 25 Appendix Piping Connection 1. Form the piping according to its routing. Avoid bending and bending back the same piping point more than three times. (This will result in hardening the pipe.) 2. After deforming the piping, align centers of the union fitting of the Indoor Unit and the piping, and tighten them firmly with wrenches.

  • 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 (R22) 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 (1, 2) Outdoor Unit to the pipe by using elbows supplied field.
  • Page 28 Refrigerant piping installation Connection of Liquid(Gas) pipe 2 Outdoor Units Connection of Gas pipe Connection of Liquid pipe Weld elbow while flowing nitrogen. After cutting to length (Don't cut the pipe of less than 70mm) Main Outdoor Liquid Pipe Sub Outdoor Sub Outdoor Main Outdoor Liquid pipe...
  • Page 29 Refrigerant piping installation Caution 1. Use the following materials for refrigeration piping. • Material: Seamless phosphorous deoxidized copper pipe 2. Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert gas. 3. Use care to prevent dust, water or other contaminants from entering the piping during installation. 4.
  • Page 30 Refrigerant piping installation WARNING When installing and moving the air conditioner to another site, be sure to make recharge refrigerant after perfect evacuation. - If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.
  • Page 31 Refrigerant piping installation Refrigerant piping system N Y branch method 1 Outdoor Unit(Half size) Example : 5 Indoor Units connected : Outdoor Unit : 1st branch (Y branch) : Indoor Units : Downward Indoor Unit L 120m ➲ Main pipe diameter (A) 1 Outdoor Unit 1 Outdoor Unit PIPE...
  • Page 32 Refrigerant piping installation 2 Outdoor Units Main Example : 5 Indoor Units connected 10m or less : Outdoor Unit : 1st branch (Y branch) : Indoor Units : Downward Indoor Unit : Connection branch pipe between Outdoor units: ARBL202C ➲ Sub Outdoor Unit ~ Connection branch pipe Pipe diameter (E) Liquid pipe Gas pipe...
  • Page 33 Refrigerant piping installation 3 Outdoor Units Example : 5 Indoor Units 10m or less connected : Outdoor Unit : 1st branch (Y branch) : Indoor Units : Downward Indoor Unit : Connection branch pipe between Outdoor units: ARBL302C : Connection branch pipe between Outdoor units: ARBL202C ➲...
  • Page 34 Refrigerant piping installation ➲ Refrigerant pipe diameter from branch to branch (B,C,D) Liquid pipe Gas pipe Downward Indoor Unit total capacity (mm) (mm) [kW(Btu/h)] ~8.3(28,300) Ø9.52(3/8 inch) Ø15.88(5/8 inch) ~17.8(60,700) Ø12.7(1/2 inch) Ø19.05(3/4 inch) ~27.9(95,200) Ø12.7(1/2 inch) Ø25.4(1 inch) ~42.4(144,700) Ø12.7(1/2 inch) Ø28.58(1 inch)
  • Page 35 Refrigerant piping installation N Header Method 1 Outdoor Unit(Half size) Example : 6 Indoor Units connected : Outdoor Unit : 1st branch : Indoor Units : Sealing L 120m ➲ Main pipe diameter (A) Branch pipe can not be used after header 1 Outdoor Unit 1 Outdoor Unit PIPE...
  • Page 36 Refrigerant piping installation 2 Outdoor Units Example : 6 Indoor Units connected 10m or : Outdoor Unit less : Header branch : Indoor Units : Sealing : Connection branch pipe between Outdoor units: ARBL202C Branch pipe can not be used after header ➲...
  • Page 37 Refrigerant piping installation 3 Outdoor Units Example : 6 Indoor Units connected 10m or : Outdoor Unit less : Header branch : Indoor Units : Sealing : Connection branch pipe between Outdoor units: ARBL302C : Connection branch pipe between Outdoor units: ARBL202C Branch pipe can not be used after header ➲...
  • Page 38 Refrigerant piping installation N Combination of Y branch/header method 1 Outdoor Unit(Half size) Example : 5 Indoor Units connected : Outdoor Unit : 1st branch (Y branch) : Y branch : Indoor Unit : Header L 120m : Sealing ➲ Main pipe diameter (A) 1 Outdoor Unit 1 Outdoor Unit PIPE...
  • Page 39 Refrigerant piping installation 2 Outdoor Units 10m or Example : 5 Indoor Units connected less : Outdoor Unit : 1st branch(Y branch) : Y branch : Indoor Unit : Connection branch pipe between Outdoor units: ARBL202C : Header : Sealing Branch pipe can not be used after header ➲...
  • Page 40 Refrigerant piping installation 3 Outdoor Units Example : 5 Indoor Units connected 10m or : Outdoor Unit less : 1st branch(Y branch) : Y branch : Indoor Unit : Connection branch pipe between Outdoor units: ARBL302C : Connection branch pipe between Outdoor units: ARBL202C : Header...
  • Page 41 Refrigerant piping installation ➲ Total piping length = A+B+C+a+b+c+d+e ≤ 220m Longest piping length Equivalent piping length A+B+b ≤ 120m A+B+b ≤ 140m Longest piping length after 1st branch B+b ≤ 30m Difference in height(Outdoor Unit ↔ Indoor) H ≤ 50m (40m : Outdoor Unit is lower than Indoor Units)** Difference in height (Indoor Unit ↔...
  • Page 42 Refrigerant piping installation N Indoor Unit Connection 1 Outdoor Unit(Half size) 1 Outdoor Unit L 120m L 120m Total piping length ≤ 220m Total piping length ≤ 220m 2 Outdoor Units 3 Outdoor Units 10m or less 10m or less Total piping length ≤...
  • Page 43 Refrigerant piping installation N The Amount of Refrigerant The calculation of the additional charge should take account of the length of pipe. Ex) 10HP Product Charge(kg) Additional charge (kg) Total liquid pipe (m): Ø22.2mm x 0.4(kg/m) x 0.3(kg/m) Total liquid pipe (m): Ø19.05mm x 0.2(kg/m) Total liquid pipe (m): Ø15.88mm x 0.12(kg/m)
  • Page 44 Refrigerant piping installation N Distribution Method 1. Line Distribution With line distribution method, it is possible to make the first or the second main pipe distribution within the third branch, and do not make the main pipe distribution, at or after the fourth branch. Main 3rd main pipe distribution Main...
  • Page 45 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 46 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. Piched pipe •...
  • Page 47 Refrigerant piping installation N Y branch pipe [unit:mm] Models Gas pipe Liquid pipe ø12.7 ø6.35 ø15.88 ø19.05 ø9.52 ø9.52 ø15.88 ARBL052S ø6.35 ø12.7 ø9.52 ø15.88 ø12.7 ø9.52 ø19.05 ø25.4 ø19.05 ø12.7 ø15.88 ARBL052L ø9.52 ø22.2 ø12.7 ø6.35 ø15.88 ø9.52 ø15.88 ø9.52 ø19.05 ø19.05...
  • Page 48 Refrigerant piping installation N 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 15.88 12.7 OD12.7 9.52 Ø12.7 Ø15.88 Ø12.7 Ø9.52 Ø6.35 Ø9.52 Ø6.35 7 branch Ø15.88 Ø12.7 ARBL057 Ø19.05 OD19.05...
  • Page 49 Refrigerant piping installation Leak Test and Vacuum (1) Leak test Leak test should be made by pressurizing nitrogen gas to 2.94 MPa(30.0kg/cm ). For the test method, refer to the following figure. (Make a test with the service valves closed. Be also sure to pressurize Liquid pipe, Gas pipe and High/Low Pressure Common pipe) The test result can be judged good if the pressure has not be reduced after leaving for about one day after com- pletion of nitrogen gas pressurization.
  • Page 50 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 51 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 52: 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 53 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 54 Electrical Wiring Control box and connecting position of wiring - Remove all of the screws on front panel by pulling it forward. - Connect Main Outdoor Unit with Sub Outdoor Units, and Main Outdoor with Indoor Units through the ter- minal block for transmission lines.
  • Page 55 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 56 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 57 Electrical Wiring N Example Connection of Transmission Cable 1 Outdoor Unit(Half size) 3 Phase Power line Transmission line (3 line): Wired remote control Single Phase of power supply line Power supply switch Transmission line (2 shield line): Between Indoor Unit and Outdoor Unit (Switch fuse) *Power supply *Power supply...
  • Page 58 Electrical Wiring N Example Connection of Transmission Cable 1 Outdoor Unit 3 Phase Power line Transmission line (3 line): Wired remote control Single Phase of power supply line Power supply switch Transmission line (2 shield line): Between Indoor Unit and Outdoor Unit (Switch fuse) *Power supply *Power supply...
  • Page 59 Electrical Wiring N Example Connection of Transmission Cable 2 Outdoor Units 3 Phase Power line Transmission line (3 line): Wired remote control Single Phase of power supply line Transmission line (2 shield line): Power supply switch Between Outdoor Unit and Outdoor Unit (Switch fuse) Transmission line (2 shield line): Between Indoor Unit and Outdoor Unit...
  • Page 60 Electrical Wiring N Example Connection of Transmission Cable 3 Outdoor Units Main 3 Phase Power line Sub1 Transmission line (3 line): Wired remote control Sub2 Single Phase of power supply line Transmission line (2 shield line): Power supply switch Between Outdoor Unit and Outdoor Unit (Switch fuse) Transmission line (2 shield line): Between Indoor Unit and Outdoor Unit...
  • Page 61 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 62 Electrical Wiring Location of setting Switch Main PCB 7 Segments (Shows setting status) SW03M (DIP switch) Sub1, 2 PCB (Shows setting status) SW03M (DIP switch) Outdoor Unit...
  • Page 63 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 64 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 65 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 66 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 67 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 68 Electrical Wiring N The Procedure of Auto Addressing Power On Waiting 3 minutes LED 01K blinking? Check outdoor PCB Press SW02M for 5 sec. Auto addressing start 7 segment LED = 88 • Auto addressing setting end Waiting about 15 minues Numbers of indoor unit connection set whose addressing is completed are indicated for 30seconds on 7-segment LED after completing setting...
  • Page 69 Electrical Wiring Group Number Setting for Indoor Units 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 ➔ D) Both the DC power (Vcc) and the GND connect the simple central controller according to the polarity of Vcc terminal and GND.
  • Page 70 Electrical Wiring Group Setting and Check Method • 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 71: 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 72 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 Compressor Stop during running Motor insulation failure Check resistance between terminals and chassis Loud noise during...
  • Page 73 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 74 Test Run Display Title Cause of Error Current detect a(CT) sensor of Main Current detect (CT) sensor of Main Outdoor Unit Inverter compressor open or short Outdoor Unit Inverter compressor Open or short of discharge temperature sensor of Main Discharge temperature sensor of Main Outdoor Unit Inverter compressor Outdoor Unit Inverter compressor Open or short of Outdoor Low Pressure sensor of Main...
  • Page 75 Test Run Display Title Cause of Error Discharge temperature of Main Compressor Off by excessive increase of discharge tempera- ture of constant speed compressor1 of the Sub1 Outdoor Outdoor constant speed compressor Unit 1 of Sub1 Outdoor Unit Discharge temperature of Main Compressor Off by excessive increase of discharge tempera- ture of constant speed compressor1 of the Sub2 Outdoor Outdoor constant speed compressor...
  • Page 76 Test Run Display Title Cause of Error Sub1 Outdoor Unit constant speed Open or short of Sub1 Outdoor Unit constant speed com- pressor2 discharge temperature sensor compressor2 discharge temperature sensor Sub1 Outdoor Unit heat exchanger Open or short of heat exchanger sensor of Sub1 Outdoor Unit (front side) sensor (front side) Open or short of heat exchanger sensor of Sub1 Outdoor...
  • Page 77 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 78 Test Run Position of the LED01Y in inverter board Outdoor Unit...

  • Page 79: 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 R22 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 80 Caution For Refrigerant Leak (3) With partition and without opening which serve as passage of air to adjoining room Outdoor unit Outdoor unit Indoor unit Indoor unit Smallest Smallest room room I Calculate refrigerant concentration Total amount of replenished Total amount of replenished In case the result of calculation exceeds In case the result of calculation exceeds refrigerant in refrigerant facility (kg)
  • Page 81 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 82 P/No.: 3828A24002E 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 lrun seriesMulti v plus lruv508t1Multi v plus lruv608t1Multi v plus lruv808t1sMulti v plus lruv1008t1Multi v plus lruv1208t1 ... Show all

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