1.website http://www.lgservice.comLGLG Room Air Conditioner SERVICE MANUAL MODELS: AS-W096URH0/UBH0/UWH0/UMH0 AS-W126URH0/UBH0/UWH0/UMH0/UCH0 AS-W096URH1/UBH1/UWH1/UMH1 AS-W126URH1/UBH1/UWH1/UMH1CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. ONLY FOR AUTHORIZED SERVICE PERSONNEL.

2. Air Conditioner Service ManualTABLE OF CONTENTS LG Model Name ...............................................................................................................................................3 Safety Precautions..........................................................................................................................................5 Dimensions ...................................................................................................................................................10 Symbols Used in this Manual ...................................................................................................................10 Indoor Unit................................................................................................................................................10 Outdoor Unit.............................................................................................................................................11 Product Specifications ................................................................................................................................12 Installation .....................................................................................................................................................13 Select the Best Location .........................................................................................................................13 Piping Length and Elevation.....................................................................................................................14 Fixing Installation Plate ............................................................................................................................14 Drill a Hole in the Wall ..............................................................................................................................15 Flaring Work.............................................................................................................................................15 Connection of Piping ...............................................................................................................................16 Connecting the Cables .............................................................................................................................22 Checking the Drainage.............................................................................................................................24 Forming the Piping ...................................................................................................................................25 Air Purging ...............................................................................................................................................26 Test Running ............................................................................................................................................28 Functions ......................................................................................................................................................30 Operation ......................................................................................................................................................33 Disassembly ..................................................................................................................................................47 Indoor Unit................................................................................................................................................47 Schematic Diagram.......................................................................................................................................50 Electric Control device..............................................................................................................................50 Wiring Diagram.........................................................................................................................................52 Components Location ..............................................................................................................................54 Troubleshooting Guide .................................................................................................................................57 Refrigeration Cycle Diagram ....................................................................................................................57 Pipe Length and the Elevation .................................................................................................................58 2-way, 3-way Valve ...................................................................................................................................59 Cycle Parts...............................................................................................................................................66 Self-diagnosis Function............................................................................................................................67 Electronic Parts ........................................................................................................................................69 Exploded View ..............................................................................................................................................80 Indoor Unit................................................................................................................................................80 Outdoor Unit.............................................................................................................................................81 Replacement Parts List ................................................................................................................................82 Indoor .......................................................................................................................................................82 Outdoor ....................................................................................................................................................842 Room Air Conditioner 3. LG Model Name 2002 1 Code2-3Type4567Code of Model89Meaning1,2Type of AirconditionerA~ZLS: LG Split Type Airconditioner3ChassisA~Z4,5Capacity(Btu/h)1~9Name of toll of Unit Ex. LS-R S R Chassis Cooling/Heating Capacity Ex. "09" 9,000Btu/h6Electric Range1~97Serial No.0~9 A~Z8Cooling/HeatingElectric Standard 1 115V/60Hz 2 220V/60Hz 3 208~230V/60Hz 5 200~220V/50Hz6 220~240V/50Hz 7 110V, 50/60Hz 8 380~415V/50Hz 9 380~415V/60HzBasic Plasma Filter Auto Swing + Plasma Filter Telephone + LED Display Telephone + LCD Display Auto Swing + Plasma Filter + Telephone + LCD Low Ambient + Ambient/change Plasma Filter + Low Ambient + Ambient/change Internet Auto Swing + Plasma Filter + Oxygen Generator Auto Swing + Soft Start Auto Swing + Star Rating Auto Swing + Star Rating + Plasma Filter Auto Swing + Soft Start + Star Rating Auto Swing + Soft Start + Star Rating 4 + Plasma Auto Swing + Telephone + LCD Auto Swing + Telephone + LCD + Soft StartA~ZUNITR22HFCR22+AC INV.INDOORH/PC/OH/PCHXYFRVGOLD FINAB56MPWYGOLD FINDE78QS1PLASMABASICGJ----34GOLD FINKL---HFC+AC HFC+DC INV. INV. H/P H/P2GOLD FIN0 1 2 3 4 5 6 7 8 9 Z Y X W V U TNBASICA~ZC/OBASICPLASMALG/OEM BrandOUTDOORBASIC9-L: LG Brand G: 2nd LG BrandH/P E/H+C/O E/H+H/P C/OA B C D E F G H J K L M N P Q R STUM: 1st OEM Brand N: 2nd OEM BrandService Manual 3 4. 2003~2005 1 Code2-3Type456Code of Model78910Meaning1Producing Center, RefrigerantA~ZL: Chang-won R22 A: Chang-won R410A C: Chang-won R407C T: China K: Turkey R22 E: Turkey R410A H: Thailand2Product TypeA~ZS: Split Type Air Conditioner3Cooling/Heating/InverterA~ZC: Cooling only H: Heat pump X: C/O + E/Heater Z: H/P + E/Heater4, 5Capacity0~9Cooling/Heating Capacity Ex. "09" 9,000 Btu/h6Electric Range1~9 A~Z1: 115V/60Hz, 2: 220V/60Hz 3: 208-230V/60Hz 5: 200-220V/50Hz 6: 220-240V/50Hz 7: 110V, 50/60Hz 8: 380-415V/50Hz 9: 380-415V/60Hz7ChassisA~ZName of Chassis of Unit Ex. LSP SP Chassis8LookA~ZLook, Color (Artcool Model)9FunctionA~Z10Serial No.1~9V: AC Inverter C/O N: AC Inverter H/P Q: DC Inverter C/O W: DC Inverter H/PA: 220V, 50Hz, 3Phase B: 208~230V, 60Hz, 3Phase C: 575V, 50Hz, 3Phase D: 440~460, 60Hz, 3Phase E: 265V, 60Hz F: 200V, 50/60HzBasic Basic+4Way Plasma Filter Plasma Filter+4 Way Tele+LCD Tele+LCD+Nano plasma+4Way Nano Plasma F+(A/changeove)+A/clean+Low A Nano Plasma F+(A/changeove)+A/clean+4way+Low A Tele+LED+4way Internet Plasma F+4Way+Oxy generator Nano Plasma F+(A/changeove)+A/clean Nano Plasma F+(A/changeove)+A/clean+4way Nano Plasma F+(A/changeove)+A/clean+PTC Nano Plasma F+(A/changeove)+Autoclean+4way+PTC Nano Plasma F+(A/changeove)+A/clean+4way+Low A+PTC Negative ION+A/Clean (Nano)Plasma+Negative ION+A/Clean 4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean Nano Plasma F+4Way+(A/changeove)+A/clean+ LG Model Development Serial No. * ARTCOOL COLOR R Mirror W White B Blue D Wood M Metal C Cherry4 Room Air ConditionerN: India Z: Brazil D: Indonesia M: Mexico V: Vietnam S: Out SourcingA B C D E F G H I J K L M N P Q R S T U 5. Safety PrecautionsSafety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. s 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. This symbol indicates the possibility of injury or damage to properties only. s Meanings of symbols used in this manual are as shown below.Be sure not to do. Be sure to follow the instruction.s Installation Do not use damaged power cords, plugs, or a loose socket. There is risk of fire of electric shock.Install the panel and the cover of control box securely. There is risk of fire of electric shock.Always use the power plug and socket with the ground terminal. There is risk of electric shock..Do not modify or extend the power cord. No grounding may cause electric shock.Service Manual 5 6. Safety Precautions For re-installation of the installed product, always contact a dealer or an authorized service center. There is risk of fire, electric shock, explosion, or injury.Be cautious when unpacking and installing the product. Sharp edges could cause injury. Be especially careful of the case edges and the fins on the condenser and evaporator.Do not install the product on a defective installation stand. It may cause injury, accident, or damage to the product.6 Room Air ConditionerDo not install, remove, or re-install the unit by yourself. There is risk of fire, electric shock, explosion, or injury.For installation, always contact the dealer or an Authorized service center There is risk of fire, electric shock, explosion, or injury.Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury. 7. Safety Precautionss Operation Do not turn the air-conditioner ON or OFF by plugging or unplugging the power plug. There is risk of fire or electrical shock.Grasp the plug to remove the cord from the outlet. Do not touch it with wet hands. There is risk of fire or electrical shock.Do not allow water to run into electrical parts.Use a dedicated outlet for this appliance. There is risk of fire or electrical shock.Do not place a heater or other appliances near the power cable. There is risk of fire and electric shock.Do not store or use flammable gas or combustibles near the air conditioner. There is risk of fire, failure of the product, or electric There is risk of fire or failure of product. shock.x Wa ThinnerService Manual 7 8. Unplug the unit if strange sounds, odors, or smoke comes from it. There is risk of electric shock or fire.Be cautious that water could not enter the product. There is risk of fire, electric shock, or product damage.s Installation Always check for gas (refrigerant) leakage after installation or repair of product. Low refrigerant levels may cause failure of product.Keep level even when installing the product. To avoid vibration or water leakage.908 Room Air ConditionerInstall the drain hose to ensure that water is drained away properly. A bad connection may cause water leakage.Use two or more people to lift and transport the air conditioner. Avoid personal injury. 9. s Operation Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.Do not touch the metal parts of the product when removing the air filter. They are very sharp! There is risk of fire, electric shock, or damage to the There is risk of personal injury. plastic parts of the product.x Wa Do not step on or put anyting on the product. (outdoor units) There is risk of personal injury and failure of product.Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in. There are sharp and moving parts that could cause personal injury.Service Manual 9 10. DimensionsDimensions Symbols Used in this Manual This symbol alerts you to the risk of electric shock. This symbol alerts you to hazards that could cause harm to the air conditioner. NOTICEThis symbol indicates special notes.Indoor Unit HD WInstallation plateMODEL DIM9k, 12k Btu SeriesUnitWmm1030Hmm290Dmm15310 Room Air Conditioner 11. DimensionsOutdoor Unit L2DL1WHL3L5Gas side (3-way valve)L4Liquid side (2-way valve)DIMMODEL unit9k, 12k Btu SeriesWmm770Hmm540Dmm245L1mm287L2mm64L3mm518L4mm10L5mm100Service Manual 11 12. Product SpecificationsProduct Specifications Table-1 Model Name Item MINCooling CapacityTypeMaxMINHeating Capacity TypeMax Power Input Running Current Starting CurrentCooling Heating Cooling Heating Cooling Heating CoolingEER Heating COP Power Supply Power Factor Air CirculationCooling HeatingIndoor,Max Outdoor,MaxMoisture Removal Noise Level Indoor,High (Sound Med. Pressure,1m) Low Outdoor,Max Refrigerant(R410A)Charge Power Cord Connecting Cable Connecting Tube Liquid Side (. Socket Flare) Gas Side Length,std Drain Hose (O.D , I.D) Indoor Dimension (W*H*D) Outdoor Net WeightAS-W096U_0AS-W126U_0AS-W096U_1AS-W126U_1UnitIndoor Outdoor12 Room Air ConditionerW kcal/h.(W) Btu/h. W kcal/h.(W) Btu/h. W kcal/h.(W) Btu/h. W kcal/h.(W) Btu/h. W kcal/h.(W) Btu/h. W kcal/h.(W) Btu/h. W W A A A A kcal/hW Btu/h.W kcal/hW Btu/h.W W/W W/W ,V,Hz % m3/min(CFM) m3/min(CFM) l/h.(pts/h.) dB(A)3 dB(A)3 dB(A)3 dB(A)3 AWG#:P*mm2 AWG#:P*mm2 mm(in) mm(in) m(in) mm(in) mm inch mm inch kg(lbs) kg(lbs)645 820 645 820 554 706 554 706 2,200 2,800 2,200 2,800 2,637 3,516 2,637 3,516 2,268 3,024 2,268 3,024 9,000 12,000 9,000 12,000 3,246 3,868 3,246 3,868 2,792 3,326 2,792 3,326 11,080 13,200 11,080 13,200 527 1,289 527 1,289 454 1,109 454 1,109 1,800 4,400 1,800 4,400 3,164 3,956 3,164 3,956 2,722 3,402 2,722 3,402 10,800 13,500 10,800 13,500 4,087 4,351 4,087 4,351 3,515 3,742 3,515 3,742 13,950 14,850 13,950 14,850 750 1,098 750 1,090 875 1,410 875 1,410 3.9 5.0 3.5 5.0 4.5 6.2 4.0 6.2 3.9 5.0 3.5 5.0 4.5 6.2 4.0 6.2 3.0 2.8 3.0 2.8 12.00 10.93 12.00 10.93 3.11 2.41 3.11 2.41 12.34 9.57 12.34 9.57 3.52 3.20 3.52 3.20 3.62 2.81 3.62 2.81 1,220-240,50 1,220-240,50 1,220-240,50 1,220-240,50 97 97 97 97 9.0(318) 9.5(335) 9.0(318) 9.5(335) 26(918) 26(918) 26(918) 26(918) 1.5(3.2) 1.5(3.2) 1.5(3.2) 1.5(3.2) 34 35 34 35 32 33 32 33 28 28 28 28 48 48 48 48 770(27.1) 820(28.9) 720(25.3) 810(28.5) 16:3*1.0 16:3*1.5 16:3*1.5 16:3*1.5 16:4*1.0 16:4*1.5 16:4*1.0 16:4*1.5 6.35(1/4) 6.35(1/4) 6.35(1/4) 6.35(1/4) 9.52(3/8) 12.7(1/2) 9.52(3/8) 12.7(1/2) 7.5(295) 7.5(295) 7.5(295) 7.5(295) 21.5,16.0(0.85,0.63) 21.5,16.0(0.85,0.63) 21.5,16.0(0.85,0.63) 21.5,16.0(0.85,0.63) 1030*290*153 1030*290*153 1030*290*153 1030*290*153 40.6*11.4*6.1 40.6*11.4*6.1 40.6*11.4*6.1 40.6*11.4*6.1 770*540*245 770*540*245 770*540*245 770*540*245 30.3*21.3*9.6 30.3*21.3*9.6 30.3*21.3*9.6 30.3*21.3*9.6 9.5(20.9) 9.5(20.9) 9.5(20.9) 9.5(20.9) 37(81.4) 38(83.8) 37(81.4) 38(83.8) 13. InstallationInstallation Select the best Location Indoor unit 1. Do not have any heat or steam near the unit. 2. Select a place where there are no obstacles in front of the unit. 3. Make sure that condensation drainage can be conveniently routed away.More than 5cmMore than 10cm4. Do not install near a doorway. 5. Ensure that the interval between a wall and the left (or right) of the unit is more than 50cm. The unit should be installed as high as possible on the wall, allowing a minimum of 10cm from ceiling.More than 5cm More than 2.3m6. Use a stud finder to locate studs to prevent unnecessary damage to the wall.CAUTION: Install the indoor unit on the wall where the height from the floor is more than 2 meters. Outdoor unit 1. If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that heat radiation from the condenser is not restricted. 2. Ensure that the space around the back and sides is more than 10cm. The front of the unit should have more than 70cm of space. 3. Do not place animals and plants in the path of the warm air.More than 60cm More than 10cm4. Take the weight of the air conditioner into account and select a place where noise and vibration are minimum. 5. Select a place where the warm air and noise from the air conditioner do not disturb neighbors.More than 70cmMore than 10cmMore than 60cmService Manual 13 14. InstallationPiping Length and Elevation Pipe SizeCapacity (Btu/h)GASLIQUIDStandard Length (m)9k3/8"1/4"4 or 57152012k1/2"1/4"4 or 571520Indoor unitAdditional Max. Max. Elevation B (m) Length A (m) Refrigerant (g/m)Outdoor unit Outdoor unitA BA Indoor unitOutdoor unitOil trapBAIndoor unitBIf piping length is more than 5mCAUTION: Capacity is based on standard length and maximum allowance length is on the basis of reliability. Oil trap should be installed every 5~7 meters.Fixing Installation Plate The wall you select should be strong and solid enough to prevent vibrationInstallation Plate1. Mount the installation plate on the wall with type "A" screws. If mounting the unit on a concrete wall, use anchor bolts. Mount the installation plate horizontally by aligning the centerline using a level.(SU) CInstallation plate 70mmCHASSIS (Grade) SU (9k~12k)Left rear pipingDistance (mm) ABCD9244674414 Room Air ConditionerBD2. Measure the wall and mark the centerline. It is also important to use caution concerning the location of the installation plate-routing of the wiring to power outlets is through the walls typically. Drilling the hole through the wall for piping connections must be done safely.Type "A" screwA Right rear piping70mm 15. InstallationDrill a Hole in the Wall Drill the piping hole with a 70mm hole core drill. Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side.WALL(3/16"~5/16")Outdoor5-7mmIndoorFlaring Work Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure.Cut the pipes and the cable. 1. Use the piping kit accessory or the pipes purchased locally.Copper pipeSlanted Uneven Rough902. Measure the distance between the indoor and the outdoor unit. 3. Cut the pipes a little longer than measured distance. 4. Cut the cable 1.5m longer than the pipe length.Burrs removalPipe1. Completely remove all burrs from the cut cross section of pipe/tube.Reamer2. Put the end of the copper tube/pipe in a downward direction as you remove burrs in order to avoid dropping burrs into the tubing.Point downPutting nut on Flare nut Remove flare nuts attached to indoor and outdoor unit, then put them on pipe/tube having completed burr removal. (not possible to put them on after flaring work)Copper tubeFlaring workOutside diameter mm inch 6.35 1/4 9.52 3/8 12.7 1/2 15.88 5/8 19.05 3/4A mm 0~0.5 0~0.5 0~0.5 0~1.0 1.0~1.3BarHandle"A"1. Firmly hold copper pipe in a die in the dimension shown in the table below. 2. Carry out flaring work with the flaring tool.Bar Yoke ConeCopper pipe Clamp handleRed arrow markService Manual 15 16. Installation Check 1. Compare the flared work with the figure by.Smooth all round Inside is shiny without scratches2. If a flared section is defective, cut it off and do flaring work again.= Improper flaring =Even length all roundInclined Surface Cracked Uneven damaged thicknessConnecting the Piping Indoor 1. Prepare the indoor unit's piping and drain hose for installation through the wall. 2. Remove the plastic tubing retainer(see the illustration by) and pull the tubing and drain hose away from chassis. 3. Replace the plastic tubing holder in the original position.(Optional)For right rear piping 1. Route the indoor tubing and the drain hose in the direction of rear right. 2. Insert the connecting cable into the indoor unit from the outdoor unit through the piping hole. Do not connect the cable to the indoor unit. Make a small loop with the cable for easy connection later.Drain hose3. Tape the tubing, drain hose, and the connecting cable. Be sure that the drain hose is located at the lowest side of the bundle. Locating at the uper side can cause drain pan to overflow inside the unit.CAUTION: If the drain hose is routed inside the room, insulate the hose with an insulation material* so that dripping from "sweating"(condensation) will not damage furniture or floors. *Foamed polyethylene or equivalent is recommended.16 Room Air ConditionerTape Connecting pipe Drain hoseConnecting cable 17. Installation 4. Indoor unit installation Hook the indoor unit onto the upper portion of the installation plate.(Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate.) Ensure that the hooks are properly seated on the installation plate by moving it left and right.Connecting cableDrain hosePress the lower left and right sides of the unit against the installation plate until the hooks engage into their slots(clicking sound). Connecting the piping to the indoor unit and drain hose to drain pipe. 1. Align the center of the pipes and sufficiently tighten the flare nut by hand.Indoor unit tubingFlare nutPipes2. Tighten the flare nut with a wrench. Outside diameter mm inch 6.35 1/4 9.52 3/8 12.7 1/2Torque kg.m 1.8 4.2 5.53. When extending the drain hose at the indoor unit, install the drain pipe.Open-end wrench (fixed) Flare nut WrenchConnection pipeIndoor unit tubingDrain pipeIndoor unit drain hose AdhesiveWrap the insulation material around the connecting portion.Vinyl tape(narrow)Plastic bands Insulation material1. Overlap the connection pipe insulation material and the indoor unit pipe insulation material. Bind them together with vinyl tape so that there may be no gap. 2. Wrap the area which accommodates the rear piping housing section with vinyl tape.Indoor unit pipeConnection pipeWrap with vinyl tape Vinyl tape (wide) Connecting cable Pipe Vinyl tape(narrow)3. Bundle the piping and drain hose together by wrapping them with vinyl tape for enough to cover where they fit into the rear piping housing section.Wrap with vinyl tape PipeVinyl tape(wide) Drain hoseService Manual 17 18. Installation For left rear piping 1. Route the indoor tubing and the drain hose to the required piping hole position.12 Connecting cable2. Insert the piping, drain hose, and the connecting cable into the piping hole. 3. Insert the connecting cable into the indoor unit. Don't connect the cable to the indoor unit. Make a small loop with the cable for easy connection later.Drain pipe4. Tape the drain hose and the connecting cables.5. Indoor unit installation Hang the indoor unit from the hooks at the top of the installation plate. Insert the spacer etc. between the indoor unit and the installation plate and separate the bottom of the indoor unit from the wall.Indoor unit Spacer Installation plate 8cmConnecting the piping to the indoor unit and the drain hose to drain pipe. 1. Align the center of the pipes and sufficiently tighten the flare nut by hand. Indoor unit tubingFlare nutPipes2. Tighten the flare nut with a wrench. Outside diameter mm inch 6.35 1/4 9.52 3/8 12.7 1/2Torque kg.m 1.8 4.2 5.5Open-end wrench (fixed) Flare nut WrenchConnection pipeIndoor unit tubing3. When extending the drain hose at the indoor unit, install the drain pipe. Drain hoseIndoor unit drain hose Adhesive18 Room Air ConditionerVinyl tape (narrow) 19. Installation Wrap the insulation material around the connecting portion. 1. Overlap the connection pipe heat insulation and the indoor unit pipe heat insulation material. Bind them together with vinyl tape so that there may be no gap. 2. Wrap the area which accommodates the rear piping housing section with vinyl tape.Plastic bands Insulation materialIndoor unit pipingConnection pipe Vinyl tape (wide)Wrap with vinyl tape Pipe Vinyl tape(narrow)Connecting cable3. Bundle the piping and drain hose together by wrapping them with cloth tape over the range within which they fit into the rear piping housing section.Pipe Drain hose Vinyl tape(narrow)Wrap with vinyl tape(wide)Reroute the pipings and the drain hose across the back of the chassis.Piping for passage through piping holeSet the pipings and the drain hose to the back of the chassis with the tubing holder. Hook the edge of tubing holder to tap on chassis and push the bottom of tubing holder to be engaged at the bottom of chassis. Indoor unit installation 1. Remove the spacer.Tubing holder2. Ensure that the hooks are properly seated on the installation plate by moving it left and right. 3. Press the lower left and right sides of the unit against the installation plate until the hooks engage into their slots(clicking sound).Connecting cableDrain hoseService Manual 19 20. Installation CAUTION: Installation Information For left piping. Follow the instruction below. Good case Press on the upper side of clamp and unfold the tubing to downward slowly.Bad case Following bending type from right to left may cause damage to the tubing.20 Room Air Conditioner 21. Installation Outdoor Align the center of the pipings and sufficiently tighten the flare nut by hand.Finally, tighten the flare nut with torque wrench until the wrench clicks. When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on the wrench.Outside diameter mm inch 6.35 1/4 9.52 3/8 12.7 1/2 15.88 5/8 19.05 3/4Torque kg.m 1.8 4.2 5.5 6.6 6.6Outdoor unit Liquid side piping (Smaller diameter)Gas side piping (Bigger diameter)Torque wrenchService Manual 21 22. InstallationConnecting the Cables Indoor Connect the cable to the indoor unit by connecting the wires to the terminals on the control board individually according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the terminal No. are the same as those of the indoor unit.)CAUTION: The above circuit diagram is subject to change without notice. The earth wire should be longer than the common wires. When installing, refer to the circuit diagram behind the panel front of the indoor unit. Connect the wires firmly so that they may not be pulled out easily. Connect the wires according to color codes, referring to the wiring diagram.CAUTION: If a power plug is not used, provide a circuit breaker between power source and the unit as shown by.Main power sourceCircuit Breaker Use a circuit breake or time delay fuse.Air ConditionerCAUTION: The power cord connected to the "A" unit should be selected according to the following specifications(Type "B" approved by HAR or SAA). (mm2) Grade NORMAL CROSS -SECTIONAL AREA9k 1.01.5Unit(A)IndoorIndoorCable Type(B)H05VV-FH05VV-F12kThe power connecting cable connecting the indoor and outdoor unit should be selected according to the following specifications (Type "B" approved by HAR or SAA).(mm2) NORMAL CROSS -SECTIONAL AREA9k12k1.0Cable Type(B)H07RN-F1.5NORMAL CROSS -SECTIONAL AREA1.51.5H07RN-FCable Type(B)H07RN-FH07RN-FGrade(AS-W096/126U_0 Series)22 Room Air Conditioner(mm2) Grade 9k12k(AS-W096/126U_1 Series) 23. Installation Outdoor 1. Remove the control cover from the unit by loosening the screw. Connect the wires to the terminals on the control board individually.Outdoor Unit Terminal block2. Secure the cable onto the control board with the cord clamp. 3. Refix the control cover to the original position with the screw. 4. Use a recognized circuit breaker 20A(12k) between the power source and the unit. A disconnecting device to adequately disconnect all supply lines must be fitted. Circuit Breaker (A)Over 5mmConnecting cable Connecting cableCover controlGrade 9k~12k 15CAUTION: According to the confirmation of the above conditions, prepare the wiring as follows. 1. Never fail to have an individual power circuit specifically for the air conditioner. As for the method of wiring, be guided by the circuit diagram posted on the inside of control cover. 2. The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to which the unit is subjected during the course of transportation. Check them and make sure that they are all tightly fastened. (If they are loose, it could cause burn-out of the wires.) 3. Specification of power source. 4. Confirm that electrical capacity is sufficient. 5. See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate. 6. Confirm that the cable thickness is as specified in the power source specification. (Particularly note the relation between cable length and thickness. 7. Always install an earth leakage circuit breaker in a wet or moist area. 8. The following would be caused by voltage drop. Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of the normal function of the overload.9. The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an air gap contact separation of at least 3mm in each active(phase) conductors.Service Manual 23 24. InstallationChecking the Drainage To check the drainage. 1. Pour a glass of water on the evaporator.Connecting area drain hose2. Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit.Leakage checking Drain panDrain hose Leakage checkingDrain piping 1. The drain hose should point downward for easy drain flow.Downward slope2. Do not make drain piping like the following.Accumulated drain water AirDo not raiseWater leakage24 Room Air ConditionerWater leakageWavingTip of drain hose dipped in water Water leakageDitchLess than 50mm gap 25. InstallationForming the Piping Form the piping by wrapping the connecting portion of the indoor unit with insulation material and secure it with two kinds of vinyl tapes.Seal small openings around pipings with a gum type sealer. Taping If you want to connect an additional drain hose, the end of the drain outlet should be routed above the ground. Secure the drain hose appropriately.Drain hosePipingsIn cases where the outdoor unit is installed below the indoor unit perform the following.Connecting cable1. Tape the piping, drain hose and connecting cable from down to up. 2. Secure the tapped piping along the exterior wall using saddle or equivalent.In cases where the Outdoor unit is installed above the Indoor unit perform the following. 1. Tape the piping and connecting cable from down to up. 2. Secure the taped piping along the exterior wall. Form a trap to prevent water entering the room.Trap is required to prevent water from entering into electrical parts.Seal a small opening around the pipings with gum type sealer.Trap3. Fix the piping onto the wall by saddle or equivalent.TrapService Manual 25 26. InstallationAir Purging Air purging The air and moisture remaining in the refrigerant system have undesirable effects as indicated below. 1. Pressure in the system rises. 2. Operating current rises. 3. Cooling(or heating) efficiency drops. 4. Moisture in the refrigerant circuit may freeze and block capillary tubing. 5. Water may lead to corrosion of parts in the refrigeration system. Therefore, after evacuating the system, take a leak test for the piping and tubing between the indoor and outdoor unit.Air purging with vacuum pump 1. Preparation Check that each tube(both liquid and gas side tubes) between the indoor and outdoor units have been properly connected and all wiring for the test run has been completed. Remove the service valve caps from both the gas and the liquid side on the outdoor unit. Note that both the liquid and the gas side service valves on the outdoor unit are kept closed at this stage. 2. Leak test Connect the manifold valve(with pressure gauges) and dry nitrogen gas cylinder to this service port with charge hoses.CAUTION: Be sure to use a manifold valve for air purging. If it is not available, use a stop valve for this purpose. The "Hi" knob of the manifold valve must always be kept close. Pressurize the system to no more than 150 P.S.I.G. with dry nitrogen gas and close the cylinder valve when the gauge reading reached 150 P.S.I.G. Next, test for leaks with liquid soap.CAUTION: To avoid nitrogen entering the refrigerant system in a liquid state, the top of the cylinder must be higher than its bottom when you pressurize the system. Usually, the cylinder is used in a vertical standing position. 1. Do a leak test of all joints of the tubing(both indoor and outdoor) and both gas and liquid side service valves. Bubbles indicate a leak. Be sure to wipe off the soap with a clean cloth. 2. After the system is found to be free of leaks, relieve the nitrogen pressure by loosening the charge hose connector at the nitrogen cylinder. When the system pressure is reduced to normal, disconnect the hose from the cylinder.Indoor unitOutdoor unitManifold valve Pressure gauge Lo HiCharge hoseNitrogen gas cylinder(in vertical standing position)26 Room Air Conditioner 27. Installation Soap water method 1. Remove the caps from the 2-way and 3-way valves. 2. Remove the service-port cap from the 3-way valve. 3. To open the 2-way valve turn the valve stem counterclockwise approximately 90, wait for about 2~3 sec, and close it. 4. Apply a soap water or a liquid neutral detergent on the indoor unit connection or outdoor unit connections by a soft brush to check for leakage of the connecting points of the piping. 5. If bubbles come out, the pipes have leakageLiquid sideGas side 2-way valve (Open) 3-way valve (Close)Evacuation 1. Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the tubing and indoor unit. Confirm the "Lo" knob of the manifold valve is open. Then, run the vacuum pump. The operation time for evacuation varies with tubing length and capacity of the pump. The following table shows the time required for evacuation.Hexagonal wrenchCapIndoor unitRequired time for evacuation when 30 gal/h vacuum pump is used If tubing length is less than 10m (33 ft) 10 min. or moreIf tubing length is longer than 10m (33 ft) 15 min. or moreOutdoor unit2. When the desired vacuum is reached, close the "Lo" knob of the manifold valve and stop the vacuum pump.Finishing the job 1. With a service valve wrench, turn the valve stem of liquid side valve counter-clockwise to fully open the valve. 2. Turn the valve stem of gas side valve counter-clockwise to fully open the valve. 3. Loosen the charge hose connected to the gas side service port slightly to release the pressure, then remove the hose. 4. Replace the flare nut and its bonnet on the gas side service port and fasten the flare nut securely with an adjustable wrench. This process is very important to prevent leakage from the system. 5. Replace the valve caps at both gas and liquid side service valves and fasten them tight. This completes air purging with a vacuum pump. The air conditioner is now ready to test run.Manifold valve Pressure gaugeLoHiOpenCloseVacuum pumpService Manual 27 28. InstallationTest Running 1. Check that all tubing and wiring are properly connected. 2. Check that the gas and liquid side service valves are fully open.Prepare remote controller 1. Remove the battery cover by pulling it according to the arrow direction. 2. Insert new batteries making sure that the (+) and () of battery are installed correctly. 3. Reattach the cover by pushing it back into position. NOTICE Use 2 AAA(1.5volt) batteries. Do not use rechargeable batteries. Remove the batteries from the remote controller if the system is not used for a long time.Settlement of outdoor unit 1. Anchor the outdoor unit with a bolt and nut(10mm) tightly and horizontally on a concrete or rigid mount. 2. When installing on the wall, roof or rooftop, anchor the mounting base securely with a nail or wire assuming the influence of wind and earthquake. 3. If the vibration of the unit is transmitted to the hose, secure the unit with an anti-vibration rubber.BoltTubing connectionEvaluation of the performance Operate the unit for 15~20 minutes, then check the system refrigerant charge:Intake temperature1. Measure the pressure of the gas side service valve. 2. Measure the temperature of the intake and discharge of air.Discharge air3. Ensure the difference between the intake temperature and the discharge is more than 8C 4. For reference; the gas side pressure of optimum condition is as below.(Cooling) The air conditioner is now ready for use. Refrigerant Outside ambient TEMP. R-22 35C (95F) R-410AThe pressure of the gas side service valve. 4~5kg/cm2G(56.8~71.0 P.S.I.G.)35C (95F) 8.5~9.5kg/cm2G(120~135 P.S.I.G.)28 Room Air ConditionerDischarge temperature 29. Installation NOTICEIf the actual pressure is higher than shown, the system is most likely over-charged, and charge should be removed. If the actual pressure are lower than shown, the system is most likely undercharged, and charge should be added.PUMP DOWN This is performed when the unit is relocated or the refrigerant circuit is serviced. Pump Down means collecting all refrigerant into the outdoor unit without the loss of refrigerant.CAUTION: Be sure to perform Pump Down procedure in the cooling mode. Pump Down Procedure 1. Connect a low-pressure gauge manifold hose to the charge port on the gas side service valve. 2. Open the gas side service valve halfway and purge the air in the manifold hose using the refrigerant. 3. Close the liquid side service valve(all the way). 4. Turn on the unit's operating switch and start the cooling operation. 5. When the low-pressure gauge reading becomes 1 to 0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close the gas side valve and then quickly turn off the unit. Now Pump Down procedure is completed, and all refrigerant is collected into the outdoor unit.Service Manual 29 30. FunctionsFunctions Indoor Unit Operation ON/OFF by Remote controller Sensing the Room Temperature Room temperature sensor. (Thermistor) Pipe temperature sensor. (Thermistor) Room temperature control Maintain the room temperature in accordance with the Setting Temp. Starting the Current Control Indoor fan is delayed for 5 sec at the starting. Time Delay Safety Control Restarting is for approx. 2 minutes. Auto Changeover Indoor Fan Speed Control Super High, High, Med, Low Operation indication Lamps (LED) --- Lights up in operation --- Lights up in Sleep Mode --- Lights up in Timer Mode --- Lights up in Preheat Mode (for Heating Model) PLASMA--- Lights up in Plasma Air Clean ModeSoft Dry Operation Mode Intermittent Operation of fan at low speed or off. Sleep Mode Auto Control The fan is switched to low(Cooling), low(Heating) speed. The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours. Natural Air Control by CHAOS Logic The fan is switched to intermittent or irregular operation The fan speed is automatically switched from high to low speed. Airflow Direction Control The louver can be set at the desired position or swing up and down automatically.30 Room Air ConditionerEnergy-Saving control(Optional) Horizontal airflow Direction Control(Optional) AUTO CLEAN(Optional) PLASMA The function will be operated while in any operation mode with selecting the function. The function is to be stopped while it is operating with selecting the function. Defrost(Deice) control (Heating) Both the indoor and outdoor fan stops during defrosting. Hot-start Control (Heating) The indoor fan stops until the evaporator pipe temperature will be reached at 34C.Heater (Optional) 31. Functions Outdoor Unit Power relay control If power is on, it will operate to chage capacitor on controller and power relay will operate after about 2~5sec. Stand by control at low temp. If outdoor temp. is below 0C, preheater is operating for 1~5min. At the initial, It will be operated compressor after 1min. for preheating. Active power filter control(PSC) The active power filter is designed to correct power factor(cos ) and to regulate DC link voltage. It will be operated PFC circuit when the compressor freq. is over 30Hz and wattage is over 450 watt. Comp. Freq. control The final operating freq. of comp. is set the lowest freq. that limited outdoor temp., discharge pipe temp., heat-sink temp., target freq., owing to CT. Overheatng. Protection(Power module) When the temp. of power module increases to 85C, controller decreases Freq. of Comp. Freq. speed control(up/down speed) It will be changed the drive freq. of comp. according to temp. of indoor and outdoor. V/F control It will be changed the drive voltage of comp. according to operating frequency. Total current control (over current protection) DC peak current control 4 way valve control It is only operated in the heating operation mode except defrosting operation. Outdoor fan motor control High speed - Although fan motor speed is middle, it will change high speed in case of below AC193V, over 45C of outdoor temp., and over fc, fh of comp. Freq. Middle speed - Nomal mode Low speed - Although fan motor speed is middle, it will change Low speed in case of over AC 270V, over 21C (Heating Mode) of outdoor temp. below 24C (Cooling Mode) of outdoor temp. Discharge pipe temp. control Low ambientService Manual 31 32. Functions Remote Control Operation ON/OFFOperation Mode Selection Cooling Operation Mode.( (Cooling (Heating model only) model only))Healthy Dehumidification Operation Mode.(Auto Operation Mode.()) Heating Operation Mode.()Fan Speed Selection (Low)(Med)(High)(CHAOS)Room, Temperature Display: (High:39CLow:11C)Temperature Setting TEMPERATURELOWHIGHCoolingDown to 18C Up to 30CHeatingJET COOLPLASMA(Optional) PLASMASetting the Time or TimerTimer Selection ONOFF: OFF, ON, OFFONTimer Setting SETTimer Cancel CANCEL: Cancel Sleep Mode, Timer ON or Timer OFFSleep Operation: 1, 2, 3, 4, 5, 6, 7, Off Timer Airflow Direction ControlPower Save Cooling ButtonHorizontal Airflow Direction Control Button(Optional)Reset Auto Clean(Optional)AUTO CLEAN32 Room Air ConditionerDown to 16C Up to 30C 33. OperationOperation LED display of indoor unit s LG Brand/OEM Brand Operation Indicator On while in appliance operation, off while in appliance pause. Blinking(3sec off/0.5sec on) according to Error Code as long as the system malfunctions.Sleep Timer Indicator On while in sleep timer mode, off when sleep timer cancel or appliance operation pause.PLASMA Indicator Timer Indicator Preheat Indicator On while in plasma mode, off when plasma mode cancel. On while in timer mode(on/off), off when timer mode is completed or canceled. Off except when hot start during heating mode operation or while in defrost control. Cooling/heating/dehumidification mode : setting temperature from remote control Fuzzy operation mode : fuzzy key data(5sec on) AISetting Temp.PLASMACooling Operation heating indicator dehumidification Shape of displayA.I operation mode StandardToo hotHotComfortableColdJet Cleaning Energy save Test in cooling operation Too cold (Cool, Heat) opeation modeSetting temp.Service Manual 33 34. OperationProtection of the evaporator pipe from frosting If the indoor pipe temperaure is below 0C in 7 min. after the compressor operates without pause while in cooling cycle operation mode, compressor, outdoor fan are turned off. When indoor pipe temp. is 7C or higher after 2 min pause of compressor compressor, outdoor fan is turned on according to the condition of the room temperature.Comp. free 6C 3C 0CComp. Step 4 Comp. Step 2Indoor pipe temp. 7CComp. offProtection of the indoor fan from droplet formation (Enclosure sweat and condensed disposal test) Control condition : The system operates standard operation without this condition as follows. Setting temperature