LG Room Air Conditioner - Appliance Factory Parts
Contents
1. IR FILTER WIRING DIAGRAM 3854AR3563P ASSEMBLY WIRING DIAGRAM 3854AR3563N ASSEMBLY S Service Parts N Non Service Parts LOCATION NO DESCRIPTION Q TY PER SET REMARKS 1 MOTOR ASSY 1 S 2 CAPACITOR 1 S 3 COMPRESSOR 1 S 4 OVERLOAD PROTECTOR 1 S 5 DC PCB ASSEMBLY 1 S 6 AC PCB ASSEMBLY 1 S 7 THERMISTOR 1 S 8 PLASMA FILTER ASSY 1 S 20 Hoom Air Conditioner Schematic Diagram 88 SEGMENT RECEIUER 28000 ooo E SRUERSS 4050 lt 0 PCB ASM 6871820325 og ooooo 2 LED2 LED STE 69 2 CN AC DC CO5D o o o A PURIFIER O c o N 5 5 DRYZHEAT CN MOTOR 34045 UN_ZTHI O o o ON OFF RECAM 6021 O ASSEMBLY 6871A20167 INIS el Gnd 0509 0200 CN AC DC e ce NOW 0 e 9 SWG SW01G SW02G TIMER FAN SPEED TEMP DOWN P C B ASSEMBLY 2 DISPLAY P C B ASSEMBLY 1 MAIN Service Manual 21 Troubleshooting Guide E Troubleshooting Guide Piping Sys CONDENSER COIL ix CAPILLARY TUBE MOTOR COMPRESSOR TURBO FAN EVAPORATOR COIL Figure 29 is a brief description of the important compo2. Possible Trouble 6 It displays abnormally on DC PCB Ass y NO Are the IC01G and ICO2G good ves NO Is the connection of NO e Replace IC01G IC02G Connect connector CN AC DC OK I Does ICO3G NO to CN AC DC exactly operate normally on AC PCB Ass y YES Replace the DC PCB Assy 32 Room Air Conditioner e Replace ICO3G Troubleshooting Guide COMPLAINT CAUSE REMEDY Fan motor will not run No power Check voltage at outlet Correct if none Power supply cord Check voltage to Control Box If none check power supply cord Replace cord if circuit is open Wire disconnected or con nection loose Connect wire Refer to wiring diagram for terminal identification Repair or replace loose terminal Capacitor Discharge capacitor before testing Test capacitor Replace if not within 10 of manufacturer s rating Replace if shorted open or damaged Will not rotate Fan blade hitting shroud or blower wheel hitting scroll Realign assembly Units using slinger ring for condenser fan must have 1 4 to 5 16 inch clearance to the base If it hits the base shim up the bottom of the fan motor with mounting screw s Check fan motor bearings if motor shaft will not rotate replace the motor Fan motor runs intermittently Revolves on overload Check voltage If not within limits call an e
3. Tow OcGrowsezt veozs ainoaaler 18915 fto iT a ele AVEO EEA YO LOW NO t Xt 1000 astu deno x AVID AM ND Jor 1000 St E E oy dm a EN 8 erTIEPEEIELEEEITe noA O gt VERSO Sar 2555 9535 EE 100855701807 quess 2425 yue s PB DS vas y 3278 a H Mo nimoran Woow oozmns NOD AD AAAAAAAA Te Te s e e Te Tz 2 JO nao SAH ND as yu cL wi bo woz pom HLN Woda t 1 z Em 1 EET THI ND ar 1100 000 1200 19 Service Manual Schematic Diagram CN MOTOR CN MOTOR WH BL Ribbed Ribbed FUSE 250VIT3 15AC A 401 AC PCB ASSEMBLY 250V T2A 115V T2A z 401 PYCOMP AC PCB ASSEMBLY BK BR BK BR 189 Plain Plain
4. Y e Replace IC01G Is the IC01G good NO Connect connector Is the connection of to CN AC DC exactly CN AC DC OK Y Does the IC03G Q01G 0026 Q03G for Delux Mode operate normally on DC NO e Replace ICO3G gt Q01G Q02G Q03G for Delux Model PCB Assy Replace the DC PCB Assy 28 Room Air Conditioner Electric Parts Possible Trouble 1 The unit does not operate Troubleshooting Guide Trans input power AC 115V 208 230V for LWL1230WAL Check the Fuse Check the wiring diagram y YES Is the Trans output power about AC 14V Is the Trans output shorted Check the AC PCB pattern Replace the Trans Is output Voltage of IC01D NO DC 12V Replace ICO1D Replace 0020 0050 NO Is output Voltage of ICO2D DC 5V Replace ICO2D Is the reset circuit OK The No 14 of Micom is 5V e Replace IC01A CO1A Is the connection between AC and DC NO Y Connect connector exactly OK YES Is the voltage No 40 of Micom Check the PCB pattern DC 5V ves Replace AC PCB Ass y Service Manual 29 Troubleshooting Guide Possible Trouble 2 The compressor does no
5. yes Check the RY COMP 26 Hoom Air Conditioner Connect LEAD Wire to RY COMP again NO Possible Trouble 4 of ICO1M OV Is the voltage NO 1 or 2 or 4 Is the voltage NO 16 or 15 or 13 FAN does not operate NO Troubleshooting Guide NO Replace ICO1M Check the RY Hi or RY Med or RY Lo Check the wiring diagram Possible Trouble 5 Is the mode cool mode Is the voltage No 3 of CN AC DC of AC PCB Ass y DC 5V YES key pushed once more from The function of Energy Saver does not operate NO gt Replace ICO1M Set the mode key to Reference to OWNER S MANUAL Energy Saver mode Check the Energy Saver mode key Check the pattern of AC amp DC PCB Service Manual 27 Troubleshooting Guide Possible Trouble 6 Remote controller does not operate Is the voltage of Battery NO gt Replace the battery over 2 3V s the voltage No 10 NO of CN AC DC on DC PCB Check the PCB pattern Ass y DC 5V NO Connect connector to Is the connection of P CN AC DC exactly CN AC DC OK Replace Receiver Ass y Possible Trouble 7 It displays abnormally on DC PCB Ass y NO
6. Disconnect the housing that connects Plazma Air Purifier Optional Figure 14 8 Remove the screw at left cover of filter case and open the cover to remove inner screw Optional 9 Remove the nut that fastens the terminal cover 10 Remove the terminal cover 11 Remove all the leads from the overload protector 12 Discharge the capacitor by placing a 20 000 ohm resistor across the capacitor terminals 13 Raise the control box upward completely See Figure 15 14 Re install the components by referring to the removal procedure above Refer to the wiring diagram found on page 22 in this manual and on the control box Figure 15 12 Hoom Air Conditioner Disassembly Air Handling 4 Air Guide and Turbo Fan Remove the front grille Refer to section 1 Remove the cabinet Refer to section 2 Remove the control box Refer to section 3 Remove the 4 screws that fasten the brace Remove the brace Remove the 2 screws that fasten the air guide upper Remove the air guide upper See Figure 16 Remove the 2 screws that fasten the evaporator 9 Move the evaporator forward and pulling it upward slightly See Figure 17 10 Pull out the hook of orifice by pushing the tabs and remove it See Figure 18 11 Remove the clamp with a hand plier that secures the turbo fan 12 Remove the turbo fan 13 Remove the 2 screws that fasten the air guide from the base pan 14 Move the ai
7. gt 11Hours gt 12Hours OHour gt 1Hour 2Hours Starting operation 1Hour 2Hours 3Hours 4Hours 5Hours 6Hours 7Hours 8Hours 9Hours 10Hours gt 11Hours gt 12Hours off gt 1Hour 2Hours gt 6 REMOCON SIGNAL RECEIVER Service Manual 11 Disassembly E Disassembly Before the following disassembly CONTROL BOX set to OFF and disconnect the power cord Mechanical 1 Front Grille 1 Open the Inlet grille downward and remove the air filter 2 Remove the screw that fastens the front grille See Figure 13 3 Pull the front grille from the right side Remove the front grille There are 4 hooks 5 Re install the components by referring to the removal procedure above 2 Cabinet 1 After disassembling the FRONT GRILLE remove the 2 screws that fasten the cabinet at both sides 2 Remove the 2 screws that fasten the cabinet at back 3 Pull the base pan forward See Figure 14 4 Remove the cabinet 5 Re install the components by referring to the removal procedure above AR 3 Control Box 1 Remove the front grille Refer to section 1 2 Remove the cabinet Refer to section 2 3 Remove the 2 screws which fasten the power cord 4 Disconnect the grounding screw from the evaporator channel 5 Remove the 1 screw that fastens the control box cover S 6 Remove the housing that connects PCB and motor M wire in the control box 7
8. to your own unit Service Manual 7 Installation How to Install When Using Installation Kits 1 Window Requirements This unit is designed for installation in standard double hung windows with actual opening widths from 29 to 41 The top and bottom window sash must open suffi ciently to allow a clear vertical opening of 16 from the bottom of the upper sash to the window stool 2 Installation Kits Contents Top retainer bar is in the product package 8 Hoom Air Conditioner 29 to 41 18 min Stool MW c Offset Less 11 4 Interior wall 26 Without frame curtain NO NAME OF PARTS Q TY 1 FRAME CURTAIN 2 2 SILL SUPPORT 2 3 BOLT 2 4 NUT 2 5 SCREW TYPE 10 2 5 16 6 SCREW TYPE B D5 1mm 0 2 16mm 0 63 3 7 SCREW TYPE D41mm 0 17 16mm 0 63 5 8 FOAM STRIP 1 9 FOAM PE 600mm x 25mm x 2mm 1 10 WINDOW LOCKING BRACKET 1 11 FOAM PE 920mm x 30mm x 2mm 1 12 DRAIN PIPE 1 13 FRAME GUIDE 2 Installation Cabinet Insta 1 Open the window Mark a line on the center of the window stool between the side window stop moldings Sill gt Loosely attach the sill bracket to the support bracket using ME Support the carriage bolt and the lock nut j A bibi g Carriage 9 Lock nut M Screw Figure 2 2 Attach the sill bracket to the window si
9. two full turns counterclockwise This will keep oil from foaming and being drawn into the vacuum pump 3 Operate the vacuum pump vaccum for 20 to 30 minutes until 600 microns of vaccum is obtained Close valves A and B and observe vacuum gauge for a few minutes A rise in pres sure would indicate a possible leak or moisture remaining in the system With valves A and B closed stop the vacuum pump 4 Remove the hose from the vacuum pump and place it on the charging cylinder See figure 29B Open valve C Discharge the line at the manifold connection 5 The system is now ready for final charging 3 Remove the capillary tube 4 Re install the components by referring to notes 6 Recharge as follows 1 Refrigeration cycle systems are charged from the High side If the total charge cannot be put in the High side the balance will be put in the suction line through the access valve which you installed as the system was opened 2 Connect the charging cylinder as shown in figure 28B With valve C open discharge the hose at the manifold connection 3 Open valve A and allow the proper charge to enter the system Valve B is still closed 4 If more charge is required the high side will not take it Close valve A 5 With the unit running open valve B and add the balance of the charge a Do not add the liquid refrigerant to the Low side b Watch the Low side gauge allow pressure to rise to 30 165 Turn off va
10. 6 R 550140 ANTIVIBRATION BUSH 4H00982C R 554031 CONDENSER ASSEMBLY FIRST 54034201128 R 554160 COMPRESSOR SET 25200 CBJ002 R 559011 FAN ASSEMBLY AXIAL 59004R 508A R 350012 FAN ASSEMBLY TURBO 5901A20009A 267110 REMOTE CONTROLLER ASSEMBLY 67114200346 R CLAMP SPRING 3H02932C R woczz CAPACITOR DRAWING 6120AR2194F R 131073 INSTALL PARTS ASSEMBLY 3127AR3403U R 552102 TUBE CAPILLARY 5210023357A R Room Air Conditioner 37 Memo 38 Room Air Conditioner January 2006 P No 3828A29003A Printed in China
11. L 37204101124 37204101124 R 249950 CONTROL BOX ASSEMBLY SINGLE 49954260038 49954260034 R 268712 PWB PCB ASSEMBLY MAIN AC 6871A20617E 68714206170 R 238310 ESCUTCHEON 3031A10021F 3831A10021F R 268714 PWB PCB ASSEMBLY MAIN DC 68714206044 68714206044 R 263230 THERMISTOR ASSEMBLY 6323420012C 63234200120 R 264110 POWER CORD ASSEMBLY 64114200480 6411420048J R 346011 MOTOR ASSEMBLY SINGLE 46014230104 46814200814 R 349001 VENTILATI N DAMPER 4900A20004A 49004200044 R 349480 ORIFICE 4948A30008A 4948A30008A R 349600 MOUNT MOTOR 4960AR1596A 4960AR1596A R 352111 TUBE CAPILLARY BEND 5211AR33322 52114302752 R 352113 TUBE ASSEMBLY DISCHARGE SINGLE 52114340054 5211A30066N R W52106 1 TUBE FORMED 5210A23358C 5210A21099E R W52106 2 TUBE FORMED 5210A23358D 5210421099F R 35211A TUBE ASSEMBLY SUCTION OUTDOOR 5211420441K 52114204411 R 352390 AIR GUIDE ASSEMBLY 5239A20002A 5239A20002A R 354210 EVAPORATOR ASSEMBLY FIRST 5421A20091F 54214200916 R 550140 ANTI VIBRATION BUSH 4H00982C 4H00982C R 554031 CONDENSER ASSEMBLY FIRST 54034200628 54034201128 R 554160 COMPRESSOR SET 2520UCBK025 2520UCBJ002 R 559010 FAN ASSEMBLY AXIAL 5900AR 15084 900 0AR1508A R 559012 FAN ASSEMBLY TURBO 59014200094 59014200094 R 267110 REMOTE CONTROLLER ASSEMBLY 67114200346 67114200346 R W48602 CLAMP SPRING 39029320 3H02932C R W0CZZ CAPACITOR DRAWING 0CZZA20001L 6120AR2194F R 131373 INSTALL PARTS ASSEMBLY 3127AR3403U 3127AR3403U R 36 Room Air Conditioner E Replace
12. SLIDE IN OUT CHASSIS COMPRESSOR OVERLOAD PROTECTOR PROTECTOR FAN MOTOR INTERNAL THERMAL PROTECTOR 3 WIRE WITH GROUDING POWER CORD ATTACHMENT PLUG CORD CONNECTED TYPE DRAIN SYSTEM DRAIN PIPE OR SPLASHED BY FAN SLINGER NET WEIGHT lbs kg 126 57 OUTSIDE DIMENSION 25 31 32 X 1627 32 X 26 27 32 uS 660 x 428 x 680 DB dry bulb Note Please refer to Label Quality on the product Since this sepcification may be WB wet bulb changed for improving performance 6 Hoom Air Conditioner Installation Installation Select the Best n To avoid vibration and noise make sure the unit is installed securely and firmly 2 Install the unit where the sunlight does not shine directly on the unit If the unit receives direct sunlight build an awning to shade the cabinet 3 There should be no obstacle like a fence within 20 which might restrict heat radiation from the condenser 4 To prevent reducing performance install the unit so that louvers of the cabinet are not blocked 5 Install the unit a little obliquely outward not to leak the con densed water into the room about 1 2 or 1 4 bubble with level FENCE 6 Install the unit with its bottom portion 30 60 above the floor FOAM E level 7 Stuff the foam between the top of the unit and the wall to pre M vent air and insects from getting into the room AIR Na 8 The power cord must be connected to an independent circuit The green wire mus
13. abinet See Fig 8 CAUTION For security purpose A reinstall screws Type A at cabinet s sides Screw Figure 8 8 Cut the Foam strip to the proper length and insert between the upper window sash and the lower win dow sash See Fig 9 9 Attach the Window locking bracket with a screw Figure 9 Type C See Fig 10 10 Attach the front grille to the cabinet by inserting the Figure 10 tabs on the grille into the tabs on the front of the cab inet Push the grille in until it snaps into place See Fig 11 11 Lift the inlet grille and secure it with a screw Type A through the front grille See Fig 11 12 Window installation of room air conditioner is now completed Power Cord Screw Type A Window locking bracket Figure 12 10 Hoom Air Conditioner Operation Function of Co Designed for COOLING ONLY Powerful and quiet cooling Slide in and slide out chassis for the simple instal Operation Built in adjustable Thermistor Washable one touch filter Compact size lation and service Low air intake top cooled air discharge Equipped with reliable and efficient rotary compressor DISPLAY REMOTE CONTROL Cool FI LOW F2 MED Energy F3 HIGH Saver FAN PRECAUTION The Remote Control unit will not e function properly if strong light strikes the sensor window of the air conditioner or if there
14. ach the recovery sys tem install one such as a WATCO A 1 before venting the Freon Leave the valve in place after servicing the system 3 Remove the overload protector Refer to sec tion 7 4 After purging the unit completely unbraze the suction and discharge tubes at the compressor connections 5 Remove the 3 nuts and the 3 washers which fasten the compressor Remove the compressor See Figure 22 Re install the components by referring to the removal procedure above Figure 22 14 Room Air Conditioner 9 Capacitor 1 Remove the control box Refer to section 3 2 Open the top cover from the control box See Figure 23 3 Pull out the capacitor from the control box 4 Disconnect all the leads of capacitor terminals 5 Re install the components by referring to the removal procedure above 10 Power Cord 1 Remove the control box Refer to section 3 2 Open the top cover from the control box Refer to section 9 3 Disconnect the front panel from the control box See Figure 24 4 Disconnect two leads from the capacitor and relay 5 Pull out the power cord 6 Re install the component by referring to the above removal procedure above Use only one ground marked hole for ground connection 7 If the supply cord of this appliance is damaged it must be replaced by the special cord The special cord means the cord which has the same specification marked on the supp
15. are obstacles between the Remote Control unit and the air conditioner w POWER BUTTON To turn the air conditioner ON push the button To turn the air conditioner OFF push the button again This button takes priority over any other buttons 2 ROOM TEMPERATURE SETTING BUTTON This button can automatically control the temperature of the room The temperature can be set within a range of 60 F to 86 F by 1 F 16 C to 30 C by 1 C Select the lower number for lower temperature of the room OPERATION MODE SELECTION BUTTON Every time you push this button it will shift among COOL ENERGY SAVER FAN and DRY Energy Saver If Energy Save mode is selected the fan stops when the compressor stops cooling a Approximately every 3 minutes the fan will turn on and check the room air to determine if cooling is needed 4 FAN SPEED SELECTOR Every time you push this button it is set as follows Hi gt Low F1 gt Med F2 gt Hi F3 gt Low F1 S ON OFF TIMER BUTTON You can set the time when the unit will turn on or turn off automatically by pressing the timer button If the unit is operating this button controls the time it will be turned off If the unit is off state this button controls the time it will start Every time you push this button the remaining time will be set as follows Stopping operation 1Hour gt 2Hours 3Hours 4Hours 5Hours 6Hours 7Hours 8Hours 9Hours 10Hours
16. arts Troubleshooting Guide asirios roban 25 Electrice Past A a 29 Exploded Vi W M dede to De dd 95 Replacement Parts 36 2 Room Air Conditioner Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage the following instructions must be followed Incorrect operation due to ignoring instruction will cause harm or damage The seriousness is Classified by the following indications AWARNING This symbol indicates the possibility of death or serious injury ACAUTION This symbol indicates the possibility of injury or damage to properties only Meanings of symbols used in this manual are as shown below py Be sure not to do Be sure to follow the instruction AWARNING Installation Do not use damaged power cord plugs or a Always use the power plug and socket with loose socket the ground terminal There is risk of fire or electric shock There is risk of electric shock Service Manual 3 Safety Precautions Do not modify or extend the power cord Do not install remove or re install the unit by yourself customer There is risk or fire or electric shock There is risk of fire electric shock explosion or injury Be cautious when unpacking and installing Do not store or use flammable gas or com the product bustibles near the air conditioner Sharp edges could cause injury Be espe
17. cially careful There is risk of fire or failure of product of the case edges and the fins on the condenser and evaporator Be sure the installation area does not deterio rate with age If the base collapses the air conditioner could fall with it causing property damage product failure and per sonal injury 4 Hoom Air Conditioner Dimensions Dimensions Symbols Used in A This symbol alerts you to the risk of electric shock This symbol alerts you to hazards that could cause harm to the A air conditioner This symbol indicates special notes Model HBLG1203R Dimension W mm inch 660 25 s2 H mm inch 428 16 32 D mm inch 680 26 7 32 Service Manual 5 Specfications E Product Specifications POWER SUPPLY 10 0 115V 60Hz 10 208 230V 60Hz CAPACITY BTU h 15 000 17 500 18 000 INPUT W 1380 1800 1850 COOLING id RUNNING CURRENT A 9 0 8 3 EER BTUM h 9 7 9 7 E COC wum Wee HEATING OPERATING 26 7 DB _19 4 WB CONDITION OUTDOOR O 710g 24 902 EVAPORATOR 3 ROW 11 STACKS LOUVERFIN TYPE CONDENSER 2 ROW 19 STACKS L BENDED TYPE OPERATION CONTROL REMOTE CONTROLLER ROOM TEMP CONTROL THERMISTOR VERTICAL LOUVER RIGHT amp LEFT AIR DIRECTION CONTROL HORIZONTAL LOUVER UP amp DOWN CONSTRUCTION
18. he evapo rator connections Remove the evaporator Re install the components by referring to notes See Figure 27 pon qos c 16 Room Air Conditioner Figure 25 Figure 26 Figure 27 Disassembly 14 Capillary Tube 1 Remove the cabinet Refer to section s2 2 After discharging the refrigerant completely unbraze the interconnecting tube at the capillary tube See caution above NOTICE Replacement of the refrigeration cycle 1 When replacing the refrigeration cycle be sure to Discharge the refrigerant system using a Freon recovery System If there is no valve to attach the recovery system install one such as a WATCO A 1 before venting the Freon Leave the valve in place after servicing the system 2 After discharging the unit completely remove the desired component and unbraze the pinch off tubes 3 Braze service valves into the pinch off tube ports leaving the valves open 4 Braze the pinch off tubes with Service valves Evacuate as follows 1 Connect the vacuum pump as illustrated figure 28A 2 Start the vacuum pump slowly open manifold valves A and B with two full turns counterclock wise and leave the valves open The vacuum pump is now pulling through valves A and B up to valve C by means of the manifold and entire system al CAUTION If high vacuum equip ment is used just crack valves A and B for a few minutes then open slowly with the
19. lectrician Test capacitor Check bearings Does the fan blade rotate freely If not replace fan motor Pay attention to any change from high speed to low speed If the speed does not change replace the motor Fan motor noise Fan If cracked out of balance or partially missing replace it Turbo If cracked out of balance or partially missing replace it Loose clamper Tighten it Worn bearings If knocking sounds continue when running or loose replace the motor If the motor hums or noise appears to be internal while running replace motor Compressor will not run but fan motor runs Voltage Check voltage If not within limits call an electrician Wiring Check the wire connections if loose repair or replace the terminal If wires are off refer to wiring diagram for identification and replace Check wire locations If not per wiring diagram correct Service Manual 33 Troubleshooting Guide COMPLAINT CAUSE REMEDY Compressor will not run but fan motor runs Thermistor Check the TEMP control If not at the lowest number set TEMP control to this setting and restart the unit Check the continuity of the thermistor Replace the thermistor if the circuit is open Capacitor Discharge capacitor before servicing Check the capacitor Replace if not within 10 of manufacturers rating Replace if shorted open or damaged Co
20. ll using the screws abd Me Carefully place the cabinet on the window stool and align the E center mark on the bottom front with the center line marked WS Outer edge window stool Support sill Bracket Z Carriage bol Screw Type B and lock nut Sill bracket Figure 3 3 Using the M screw and the lock nut attach the support bracket to the cabinet track hole Use the first track hole after the sill bracket on the outer edge of the window sill Tighten the carriage bolt and the lock nut Be sure the cabi net slants outward CAUTION Do not drill a hole in the reiner bottom pan The unit is designed to operate with approximately 1 2 of water in bottom pan 4 Pull the bottom window sash down behind the Top retainer Ty bar until they meet Ep uU Figure 5 1 Do not pull the window sash down so tightly that the move Sash track ment of Frame curtain is restricted Attach the cabinet to the window stool by driving the screws B through the cabinet into window stool 2 The cabinet should be installed with a very slight tilt downward toward the outside Screw Type B Figure 6 Service Manual 9 Installation 5 Pull each Frame curtain fully to each window sash track and pull the bottom window sash down behind the Top retainer bar until it meets 6 Attach each Frame curtain the window sash by using screws Type C See Fig 7 7 Slide the unit into the c
21. lve B and allow pressure to drop d Repeat steps b and c until the balance of the charge is in the system 6 When satisfied the unit is operating correctly use the pinch off tool with the unit still running and clamp on to the pinch off tube Using a tube cutter cut the pinch off tube about 2 inches from the pinch off tool Use sil fos brazing and braze pinch off tube closed Turn off the unit allow it to set for a while and then test the leakage of the pinch off connection Service Manual 17 Disassembly Equipment needed Vacuum pump Charging cylinder Manifold gauge Brazing equipment Pin off tool capable of making a vapor proof seal Leak detector Tubing cutter Hand Tools to remove components Service valve COMPOUND GAUGE CONDENSER HIGH PRESSURE SIDE varon Q Q GAUGE B CAPILLARY TUBE SEE INSETS BELOW EVAPORATOR LOW PRESSURE SIDE COMPRESSOR EXTERNAL VACUUM PUMP CHARGING CYLINDER Figure 28A Pulling Vacuum Figure 28B Charging 18 Room Air Conditioner Schematic Diagram Schematic Diagram ase m CPUS too ox bg on eat Sen an 3maona37 pea aro aro aroa ro g ipu Em azo E lo quot asoa E BIWOd NIVIN iid vet auos fonz
22. ly cord attached at the unit Disassembly Figure 23 Figure 24 Service Manual 15 Disassembly 11 Motor Remove the cabinet Refer to section 2 Remove the turbo fan Refer to section 4 Remove the fan Refer to section 5 Remove the 4 screws that fasten the motor from the air guide See Figure 25 Remove the motor 6 Re install the components by referring to the removal procedure above See Figure 25 Bb al Refrigerating 12 Condenser CAUTION Discharge the refrigerant system using a Freon Recovery System If there is no valve to attach the recovery system install one such as a WATCO A 1 before venting the Freon Leave the valve in place after servicing the system 1 Remove the cabinet Refer to section 2 2 Remove the 4 screws that fasten the brace Refer to section 4 3 Remove the 5 screws that fasten the condenser and shroud 4 After discharging the refrigerant completely unbraze the interconnecting tube at the con denser connections 5 Remove the condenser 6 Re install the components by referring to notes See Figure 26 13 Evaporator Remove the control box Refer to section 3 Remove the air guide upper Refer to section 4 Remove the 2 screws that fasten the evapora tor 4 Move the evaporator sideways carefully Refer to section 4 5 After discharging the refrigerant completely unbraze the interconnecting tube at t
23. ment Parts List Replacement Parts List T DESCRIPTION Iu ON REMARK l L1804R 130410 BASE ASSEMBLY WELD SINGLE 30414200237 R 130910 CABINET ASSEMBLY SINGLE 30914R6057V R 135312 GRILLE ASSEMBLY FRONT SINGLE 3531 20095 R 135314 GRILLE INLET 3530A 10080 R 749740 GUIDE 2H00858D R 147581 LOUVER HORIZONTAL 4758A30022A R 1475821 LOUVER VERTICAL 4758A20042A R 147582 2 LOUVER VERTICAL 47584200428 R 148000 BRACE 4800420001 R 149980 SHROUD 4998100264 R 159880 FILTER ASSEMBLY AIR CLEANER 5231 20008 R 137215 PANEL CONTROL 3720A10112A R 249950 CONTROLBOX ASSEMBLY SINGLE 4995A26003A R 2687112 PWB PCB ASSEMBLY MAIN AC 6871A20617D R 238310 ESCUTCHEON 3831A10021F R 2687111 PWB PCB ASSEMBLY MAIN DC 6871A20604A R 567480 THERMISTOR ASSEMBLY 63234200120 R 264110 POWER CORD ASSEMBLY 641820048 R 346811 MOTOR ASSEMBLY SINGLE 4681420081 R 349001 VENTILATION DAMPER 49004200044 R 349480 ORIFICE 4948A30008A R 349600 MOUNT MOTOR 49604R 15964 R 352111 TUBE CAPILLARY BEND 52114302757 R 352113 TUBE ASSEMBLY DISCHARGE SINGLE 5211A30066N R 3521151 TUBE FORMED 5210421099 R 3501152 TUBE FORMED 5210421099F R 35214 TUBE ASSEMBLY SUCTION OUTDOOR 5211A20441L R 749750 AIR GUIDE ASSEMBLY 5239A20002A R 354210 EVAPORATOR ASSEMBLY FIRST 542120091
24. mpressor Check the compressor for open circuit or ground If open or grounded replace the compressor Overload Check the compressor overload if externally mount ed Replace if open If the compressor temperature is high remove the overload cool it and retest Compressor cycles on Voltage Check the voltage overload If not within limits call an electrician Overload Check overload if externally mounted Replace if open If the compressor temperature is high remove the overload cool and retest Compressor cycles on Fan motor If not running determine the cause Replace if overload required Condenser air flow restric tion Remove the cabinet inspect the interior surface of the condenser if restricted clean carefully with a vac uum cleaner do not damage fins or brush Clean the interior base before reassembling Condenser fins damaged If condenser fins are closed over a large area on the coil surface head pressures will increase causing the compressor to overload Straighten the fins or replace the coil Compressor cycles on overload Capacitor Test capacitor Wiring Check the terminals If loose repair or replace Refrigerating system Check the system for a restriction Insufficient cooling or heat ing Air filter If restricted clean of replace Exhaust damper door Close if open Unit undersized Determine if the unit is properly sized for the area
25. nents and their function in what is called the refrigeration system This will help you to understand the refrigeration cycle and the flow of the refrigerant in the cooling cycle CYCLE OF REFRIGERATION EVAPORATOR COILS CONDENSER COILS VAPOR INLET COMPLETE LIQUID COOL LOW PRESSURE VAPOR HOT BOIL OFF POINT DISCHARGED A AIR e SEILER EEE m ROOM AIR HEAT LOAD lt A beg EES E p pom ENSIS OUTSIDE COOLING 4 AIR FOR REFRIGERANT PASS THROUGH 4 cem COMPRESSOR Eo B 7 LIQUID PRESSURE LIQUID OUTLET DROP D REFRIGERANT A HIGH PRESSURE VAPOR CAPILLARY TUBE a A REFRIGERANT P777 LOW PRESSURE VAPOR Figure 29 22 Room Air Conditioner Troubleshooting Guide In general possible trouble is classified in two kinds The one is called Starting Failure which is caused from an electrical defect and the other is ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application Ineffective Cooling Check cold air circulation Check outdoor coil for smooth flow heat exchanger amp the fan operation Dirty indoor coil Check gas leakage Heat exchanger Not on separate circuit Malfunction of fan Repair gas leak Clogged of air filter Obstruc
26. perate Troubleshooting Guide Trans input power AC 115V Check the Fuse Check the wiring diagram y YES Is the Trans output power about AC 14V Is shorted the Trans output Check the Main PCB pattern Replace the Trans Is output Voltage of IC01D NO DC 12V Replace ICO1D Replace 0020 0050 NO Is output Voltage of ICO2D DC 5V Is the reset circuit OK The No 14 of Micom is 5V Is the connection between NO AC and DC OK YES NO Is the voltage No 18 of Micom Replace AC PCB Ass y Replace ICO2D e Replace IC01A CO2A Connect connector exactly Check the PCB pattern Service Manual 25 Troubleshooting Guide Possible Trouble 2 Is setting NO Temp set lower than Room The compressor does not operate Temp 0 5 C Is the voltage No 10 of ICO1M OV Is the voltage NO 9 of po Select the setting Temp to lower Number Does the Unit delay for ICO1M DC 12V 3 minutes Check the RY COMP Check the wiring Replace ICO1M Wait 3 Minutes Diagram Possible Trouble 3 Is the wire connection of NO Replace MAIN PCB Assy The compressor always operate RY COMP OK
27. r guide backward and pull out from the base pan Move the air giude lower carefully 15 Re install the components by referring to the removal procedure above N Figure 16 Figure 17 5 FAN Remove the cabinet Refer to section 2 Remove the brace Refer to section 4 Remove the 5 screws that fasten the condenser Move the condenser to the left carefully Remove the clamp that secures the fan Remove the fan See Figure 19 Re install by referring to the removal procedure NS Sa X WD gt Figure 18 Figure 19 Service Manual 13 Disassembly 6 Shroud 1 Remove the fan Refer to section 5 2 Remove the shroud See Figure 20 3 Re install the components by referring to the removal procedure above Figure 20 Electrical Par 7 Overload Protector 1 Remove the cabinet Refer to section 2 Remove the nut that fastens the terminal cover Remove the terminal cover See Figure 21 Remove all the leads from the overload protec tor Remove the overload protector 6 Re install the components by referring to the removal procedure above C m OED al ZEE 0277 IV V Figure 21 8 Compressor 1 Remove the cabinet Refer to section 2 2 Discharge the refrigerant system using a Freon Recovery System If there is no valve to att
28. t be grounded gt 9 Connect the drain tube to the base pan hole in the rear side if S er m you need to drain consult a dealer Plastic hose or equivalent may be connected to the drain tube Figure 1 The setting conditions must be checked prior to initial starting The following items are especially important check points when the installation is finished 1 Grounding wire Green or Green and Yellow is provided in the power cord The green wire must be grounded 2 Connect to a single outlet 15A circuit or 20A circuit for Electric Heater Model 3 To avoid vibration or noise make sure the air conditioner is installed securely 4 Avoid placing furniture or draperies in front of the air inlet and outlet In humid weather excess water may cause the BASE PAN to overflow To drain the water remove the DRAIN CAP and secure the DRAIN PIPE to the rear hole of the BASE PAN Press the drain pipe into the hole by pushing down and away from the fins to avoid injury Optional 1 Install the drain pan over the corner of the cabinet where you removed the plug with 4 or 2 screws gt Fig 1 2 Connect the drain hose to the outlet located at the bottom of the drain PAN DRAIN HOSE pan You can purchase the drain hose or tubing locally to satisfy your particular needs Drain hose is not supplied 3 Select the most appropriate connection from among the following figures by considering the hole of the unit to fit drain pan
29. t operate Is desired Temp set lower than Room Temp 0 5 C NO Select the desired Temp to lower Number Is the voltage No 10 of ICO1M OV Is the voltage NO 9 of ICO1M DC 12V Is the Unit for 3 minutes Check the RY COMP Replace ICO1M Wait 3 Minutes Check the wiring Diagram Replace AC PCB Assy Possible Trouble 3 The compressor always operate iii NO Connect LEAD Wire to s the wire RY COMP again RY COMP OK 9 ps Check the RY COMP 30 Hoom Air Conditioner Possible Trouble 4 FAN does not operate NO Troubleshooting Guide gt Replace ICO1M Is the voltage NO 1 or 2 or 4 of ICO1M DC 5V ves Replace ICO1M Replace the battery Is the voltage NO 16 or 15 or 13 of ICO1M 0V Check the RY Hi or RY Med or RY Lo Check the wiring diagram Possible Trouble 5 Remote controller does not operate Is the voltage of Battery NO over 2 3V s the voltage No 10 NO Check the PCB pattern of CN AC DC on AC PCB Assy DC 5V NO Is the connection of Connect connector to Y CN AC DC OK e Replace Receiver Ass CN AC DC exactly Service Manual 31 Troubleshooting Guide
30. tion at air outlet Unit runs but poor cooling Check heat load increase Clean condenser Check inside gas Replacement of unit if the pressure unit is beyond repair Adjusting of refrigerant charged Correct above trouble Malfunction of compressor Check clogging in refrigera Replacement of tion circuit compressor Satisfactory operation with Repair clogging in refrigera temperature difference of tion circuit inlet amp outlet air 44 50 F 7 10 C Service Manual 23 Troubleshooting Guide Fails to Start Check of power source Check circuit breaker and fuse Check of control switch Gas leakage of feeler bulb setting of thermostat Check of control switch Fan only fails to start Improper wiring Defect of fan motor capacitor Compressor only fails to start Drop of power voltage lt Improper thermostat setting Defect of compressor capacitor Loose terminal connection Irregular motor resistance Q Irregular motor insulation Q Replacement of fan motor Regular but fails to start Capacitor check lt Improper wiring Replacement Irregular motor resistance Q Irregular motor insulation Q Replacement of compressor locking of rotor metal Replacement of compressor Motor damaged 24 Room Air Conditioner Possible Trouble 1 The unit does not o
31. to be cooled Excessive noise Turbo or fan Check the set screw or clamp If loose or missing correct If the turbo or fan is hitting air guide rearrange the air handling parts Copper tubing Remove the cabinet carefully and rearrange tubing not to contact cabinet compressor shroud and barri er 34 Hoom Air Conditioner Exploded View Exploded View Service Manual 35 El Replacement Parts List Replacement Parts List prb DESCRIPTION oa REMARK LWHD1450ER LWHD1800R 130410 BASE ASSEMBLY WELD SINGLE 30414200237 30414200678 R 130910 CABINET ASSEMBLY SINGLE 3091AR6057V 3091AR6057V R 135312 GRILLE ASSEMBLY FRONT SINGLE 35314102014 35314102014 R 135313 GRILLE INLET 35304101464 35304101464 R 135500 COVER 35504200894 35504301224 R 147581 LOUVER HORIZONTAL 47584300224 47584300224 R 14758241 LOUVER VERTICAL 47584200424 47584200424 R 1475822 LOUVER VERTICAL 4758420042B 47584200428 R 148000 BRACE 48004200014 48004200014 R 149980 SHROUD 49984100134 49984100264 R 152302 FILTER ASSEMBLY AIR CLEANER 52314200084 52314200084 R 237200 PANEL CONTRO
32. website http www lgappliance LG LG Room Air Conditioner IV MODELS LWHD1500ER LWHD1800R L1804R NIT READ THE SAFETY ANUAL D SERVICE PERSONNEL Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautlons ordei ee eid ee ee atte 3 DIMENSIONS M XL Gate ell 9 Outside dimension S thls abor pissed 5 Product Specifications custodia ol 6 Installallolt a ia 7 Select the Best Location ta 7 Installation Check Sende e t p deu eut lius 7 How to secure the Drain Pipe uod s osito tl en Inde Dl re 7 Howto Install ei 8 Gabinet Installation As a e a tas 9 lcu mee E 11 Function Of Controls pei p cente So rt pn degebant ane aS peu tus pena eS 11 Disassembly 12 Mechanical em 12 P RA 13 Electrical PariS restet tese putet ban 14 Heilgeratintg Cycle ias neo e a nt tutos cile ect on 16 Schematic db pod pies digna PR ee 19 Electronic Control Device secos ict edente et acted paci es beds ee an ed 19 Winnog A n ci Lt LL D DI DE 20 Components RENI TET 21 AOU SIO TEC GUIAE e E 22 RS A 22 Troubleshooting Guide 23 Electrical P
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