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ROOM AIR CONDITIONER SERVICE MANUAL

1. ONIMSIV si jo eu 2 799 Wyo SI 51018 501 jo eu ALON ONAS NO 4 5 3 COMPONENTS LOCATION FOR MAIN P C B ASM MODEL LWC183MGMJ1 LWC183MSMM1 01 49 QIN AU IH AY 305 Def coza ICOIA g 5 4 COMPONENTS LOCATION FOR DISPLAY P C B ASM MODEL LWC183MGMJ1 LWC183MSMM1 PWB ASM rl C22L 5 202 TIMER lt gt MODE J06 SWZ SW2 e ei eo RECEIVER 22 17 gt FAN COOL o a Ei LL 5 gt et 9 JW ES Pic PWE LEDA RER DEFROST DRY JW HVB Y see FAN SPEED DOIF TEMP TEMP UP AUTO SWIN ON OFF 5 DOWN SW7 swa swe 5 NL PWB 6870 90070
2. Figure 17A Pulling Vacuum Figure 17B Charging 12 3 TROUBLESHOOTING GUIDE 3 1 OUTSIDE DIMENSIONS 675 770 660 428 3 2 PIPING SYSTEM CONDENSER COIL ae CAPILLARY TUBE MOTOR COMPRESSOR BLOWER EVAPORATOR COIL REFRIGERANT FLOW Following is a brief description of the important components and their functions in the refrigeration system Refer to Fig 18 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle ROOM AIR CONDITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS CONDENSER COILS SUCTION LINE VAROR INLET COMPLETE LIQUID CQOL LOW PRESSURE VAPOR HOT BOIL OFF POINT DISCHARGED COOLED AIR AIR wt t ROOM AIR HEAT LOAD ag u lt B e t OUTSIDE COOLING lt AIR FOR REFRIGERANT PASS H MOTOR SSTHROUS COMPRESSOR 2 OIL LIQUID PRESSURE DROP LIQUID OUTLET LIQUID REFRIGERANT PRESSURE VAPOR CAPILLARY TUBE wW _ L au o PEFRIGERANT Figure 18 Ez Low PRESSURE VAPOR 13 3 3 TROUBLESHOOTING G
3. INTERNAL OVERLOAD PROTECTOR FAN MOTOR INTERNAL THERMAL PROTECTOR 3 WIRE WITH GROUNDING CORD CONNECTED TYPE ATTACHMENT PLUG OPTION DRAIN SYSTEM DRAIN PIPE OR SPLASHED BY FAN SLINGER NET WEIGHT 130 60 inch 26 x 16 27 32 x 26 9 16 mm 660 x 428 x 675 DB Dry Bulb WB Wet Bulb NOTE Specifications are subject to minor change without notice for further improvement 3 1 4 FEATURES Designed for cooling only Powerful and quiet cooling Slide in and slide out chassis for the simple installation and service Reversible inlet grille 1 5 CONTROL LOCATIONS VENTILATION The ventilation lever must be in the CLOSE position in order to maintain the best cooling conditions When a fresh air is necessary in the room set the ventilation lever to the OPEN position The damper is opened and room air is exhausted NOTE Before using the ventilation feature make the lever as shown First pull down part to horizontal line with part B Precaution The Remote Control unit will not function properly if strong light strikes the sensor window of the air conditioner or if there are obstacles between the Remote Control unit and the air conditioner THERMOSTAT Thermostat will automatically control the temperature of the room Select the higher number for the lower temperature of the room The temperature is selected by positioning the knob to the de
4. 25 DOSF D07F DO8F J09 lel 4 7 6 EXPLODED VIEW 272 272 FIR ZF 7 AAT lt gt 2 KSB GRD A gt 2 9660022 gt LA s 5 KA 2 7 REPLACEMENT PARTS LIST R Service Parts PART NO red ION DESCRIPTION REMARK LWC183MGMJ1 LWC183MSMM1 LWC183MGAB1 130410 BASE ASSEMBLY SINGLE 3041A30002B R 130910 CABINET ASSEMBLY SINGLE 3091AR6057B R 135312 GRILLE ASSEMBLY FRONT 3531A20005L 3531A20073E 3531A20005A R 135313 GRILLE INLET 3530AR1604A 3530AR1603A 3530AR1604A R 135500 COVER CONTROL BOX 3551A30015A R 137215 PANEL ASSEMBLY CONTROL 3721A20002B R 146812 MOTOR ASSEMBLY SYNC 2H01102A R 147581 1 LOUVER HORIZONTAL 4758AR7264A R 147581 2 LOUVER HORIZONTAL 4758AR7278A R 147582 LOUVER VERTICAL 4758AR6157A R 148000 BRACE 4800AR7272A R 149410 KNOB ASSEMBLY 4941A30001A R 149980 SHROUD 4998A10027A R 152302 FILTER ASSEMBLY A C 5231AR6159A R 237200 PANEL ASSEMBLY CONTROL 3720A10038A 3720AR6163A R 238310 ESCUTCHEON 3831A10017B 3831A20032B R 249950 CONTROL BOX ASSEMBLY SINGLE 4995A20215U 4995A20215T 4995A20254D R 263230 THERMISTOR ASSEMBLY 6323A20003D R 264110 POWER CORD ASSEMBLY 2H00677Q R 26602 SWITCH ROCKER 2H01316C R 266003 SWITCH ROTARY 2H00598bE R
5. If loose or miss ing correct If the blower or fan is hitting scroll or barrier rearrange the air handling parts Copper tubing Remove the cabinet and carefully rearrange the tubing not to contact the cabinet compressor shroud and barrier Auto air swing fails Wiring Check terminals If loose repair or replace Synchronous motor Check the synchronous motor for open circuit 5 SCHEMATIC DIAGRAM 5 1 CIRCUIT DIAGRAM C yam POWER INPUT Ribbed V Plain GN YL GN amp THERMISTOR 0 0 DISPLAY ASM CN WORK jen svnc cn Disp MAIN P W B ASM ZNR COMP RY COMP 3 la THERMOSTAT B FUSE 250V T2A 9 0 WH BR IBK BR EN lt 4 K 3854AR2330P 3854AR2206H WIRING DIAGRAM WIRING DIACRAM ROCKER SWITCH 2 o DESCRIPTION POWER CORD FAN MOTOR CAPACITOR COMPRESSOR MAIN PWB ASSEMBLY DISPLAY PWB ASSEMBLY THERMISTOR ASSEMBLY CONNECTOR FUSE ROTARY SWITCH THERMOSTAT ASSEMBLY 23 ELECTOINC CONTROL DEVICE MODEL 2 5 LWC183MGMJ1 LWC183MSMM1 3NOd
6. Pull the base pan forward so that you can remove the 2 screws which fasten the cover control at the right side See Fig 3 3 Remove the 3 screws which fasten the control box See Fig 3 4 Discharge the capacitor by placing a 20 000 ohm resistor across the capacitor terminals 5 Disconnect two wire housings in the control box Pull the control box forward completely 7 Re install the components by referring to the removal procedure See Fig 3 Refer to the circuit diagram found on page 23 in this manual and on the control box Figure 2 Figure 3 2 2 AIR HANDLING PARTS 2 2 1 COVER AT THE TOP 1 Remove the front grille Refer to section 2 1 1 2 Remove the cabinet Refer to section 2 1 2 3 Remove 11 screws which fasten the brace and covers 4 Remove the covers and the brace See Fig 4 5 Re install the components by referring to the removal procedure above 2 2 2 BLOWER 2 1 1 Remove the cover Refer to section 2 2 1 2 Remove the 3 screws which fasten the evaporator at the left side and the top side See Fig 4 3 Move the evaporator sideward carefully 4 Remove the orifice from the air guide carefully 5 Remove the clamp spring which is clamped to the boss of blower by hand plier See Fig 5 6 the blower outward without touching blades See Fig 6 7 Re install the components by referring to the removal procedure above 2 3 FAN Remove th
7. REMEDY Fan If cracked out of balance or partially missing replace it Blower If cracked out of balance or partially missing replace it Loose set screw Tighten it Worn bearings If knocking sounds continue when running or loose replace the motor Ifthe motor hums or noise appears to be internal while running replace motor Compressor will not run fan motor runs Voltage Check voltage See the limits on the preceding page If not within limits call an electrician Wiring Check the wire connections if loose repair or replace the terminal If the wires are discon nected refer to wiring diagram for identification and replace the wires Check the wire connections If not according to the wiring diagram correct the connections Rotary Check for continuity refer to the wiring diagram for terminal identification Replace the switch if the circuit is open 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 Check the capacitor Replace if not within 10 of manufacturer s servicing rating replace if shorted open or damaged Compressor Check the compressor for open circuit or ground If open or grounded replace the compressor Overload Check the compressor over
8. 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 16 Turn off valve 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 solder and solder 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 11 Equipment needed Vacuum pump Charging cylinder Manifold gauge Brazing equipment Pinch off tool capable of making a vapor proof seal Leak detector Tubing cutter Hand Tools to remove components Service valve CONDENSER COMPOUND EN HIGH PRESSURE SIDE O O MANIFOLD GAUGE B CAPILLARY TUBE SEE INSETS BELOW EVAPORATOR LOW PRESSURE SIDE COMPRESSOR EXTERNAL VACUUM PUMP CHARGING CYLINDER
9. the unit 2 3 5 THERMISTOR 1 2 3 Remove the control box Refer to section 2 1 3 Unfold the control box Refer to section 2 3 3 Disconnect the thermistor terminals from main P W B assembly Remove the thermistor Re install the components by referring to the removal procedure above See Figure 13 2 3 6 SYNCHRONOUS MOTOR 1 2 3 4 Remove the control box Refer to section 2 1 3 Unfold the control box Refer to section 2 3 3 Remove the crankshaft Disconnect all the leads of the synchronous motor Remove the 2 screws which fasten the synchronous motor See Fig 14 Re install the components by referring to the removal procedure above Figure 12 Figure 13 Figure 14 2 4 REFRIGERATION CYCLE m CAUTION Discharge the refrigerant system using 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 4 1 CONDENSER 1 Remove the cabinet Refer to section 2 1 2 2 Remove the brace and the shroud cover Refer to section 2 2 1 3 Remove the 5 screws which fasten the condenser 4 After discharging the refrigerant completely unbraze the interconnecting tube at the condenser connections 5 Remove the condenser 6 Re install the components by referring to notes See Fig 15 2 4 2 EVAPORATO
10. 267110 REMOTE CONTROLLER 6711A20056M R 268712 PWB PCB ASSEMBLY DISPLAY 6871A20140C 6871A20195C R 268714 PWB PCB ASSEMBLY MAIN 6871A10031F 6871A20188A R 269310 THERMOSTAT ASSEMBLY 2H01109L R 346811 MOTOR ASSEMBLY SINGLE 4681A20081B R 349001 DAMPER VENTILATION 4900AR7265B R 349480 ORIFICE 4948A20014A R 349600 MOUNT MOTOR 4960AR1596A R 352102 TUBE CAPILLARY BEND 5211A20020P R 352113 TUBE ASSEMBLY DISCHARGE 5211A20805A R 352111 TUBE ASSEMBLY CONNECTOR 5211AR7059W R 352390 AIR GUIDE ASSEMBLY 5239A20001R R 354210 EVAPORATOR ASSEMBLY FIRST 5421A20009D R 359012 FAN TURBO 5901A20009A R 550140 ISOLATOR COMP 4H00982C R 554030 CONDENSER ASSEMBLY FIRST 5403A20112C 5403 20112 R 554160 COMPRESSOR SET 2520UMGK2AA R 559010 FAN AXIAL 5900AR1330A R 738281 MANUAL SERVICE 3828 20294 R 738290 MANUAL OWNERS 3828A20196Z 3828A20307B 3828A20307K R 35211A TUBE ASSEMBLY SUCTION 5211A10247B R WOCZZ CAPACITOR 6120AR2194F R W48602 CLAMP SPRING 3H02932C R W52106 1 TUBE EVAPORATOR 5210A30009X R W52106 2 TUBE EVAPORATOR 5210A30009W R NOTE Please ensure GCSC since these parts may be changed depending upon the buyer s request GCSC WEBSITE http biz LGservice com 27 LG Electronics Inc February 2003 P No 3828A20294E Printed in Korea
11. ANCE TEST 1 When servicing set POWER of CONTROL BOARD to 1 Unplug the power cord and connect a jumper between 2 Off and unplug the power cord 2 Observe the original lead dress pins black and white 2 The grounding conductor green or green and yellow is to If a short circuit is found replace all parts which have been be open overheated or damaged by the short circuit 3 Measure the resistance value with an ohm meter between 3 After servicing make an insulation resistance test to the jumpered lead and each exposed metallic part on the prevent the customer s exposure to shock hazards equipment at all Mode except POWER OFF 1 3 SPECIFICATIONS 4 The value should be over 1 MO MODELS LWC183MGMJ1 LWC183MSMM1 LWC183MGAB1 ITEMS POWER SUPPLY 10 208 230V 60Hz COOLING CAPACITY 17 500 18 000 INPUT 1 800 1 850 RUNNING CURRENT 9 0 8 3 REFRIGERANT R 22 625g 220z OPERATING INDOOR 26 7 DB 19 4 WB TEMPERATURE OUTDOOR 35 DB 23 9 WB EVAPORATOR 2 ROW 15STACKS CONDENSER 2 ROW 19STACKS FAN INDOOR TURBO FAN OUTDOOR PROPELLER TYPE FAN WITH SLINGER RING FAN SPEEDS FAN COOLING 3 3 2 3 FAN MOTOR 6 POLES OPERATION CONTROL WIRELESS REMOCON ROTARY SWITCH ROOM TEMP CONTROL THERMISTOR THERMOSTAT AIR DIRECTION CONTROL VERTICAL LOUVER RIGHT amp LEFT HORIZONTAL LOUVER UP amp DOWN CONSTRUCTION SLIDE IN OUT CHASSIS
12. ME PLATE RATING MINIMUM MAXIMUM 208 230 10 187V 253V COMPLAINT CAUSE REMEDY Fan motor will not run No power Check voltage at outlet Correct if none Power supply cord Check voltage to rotary switch If none check power supply cord Replace cord if circuit is open Rotary switch Check switch continuity Refer to wiring diagram for terminal identification Replace switch if defective Wire disconnected or Connect wire Refer to wiring diagram for connection loose terminal identification Repair or replace loose terminal Capacitor Discharge Test capacitor capacitor before testing 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 Re align assembly Units using slinger ring condenser fans must have 0 22 0 25 inch clearance to the base If necessary 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 Revolves on overload Check voltage See limits on this page If not within limits call an electrician 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 20 COMPLAINT Fan motor noise CAUSE
13. R 1 Remove the cabinet Refer to section 2 1 2 2 Remove the top cover and the brace Refer to section 2 2 1 3 Discharge the refrigerant completely 4 Remove the 3 screws which fasten the evaporator at the left side and the top side Figure 15 b 5 Move the evaporator sideward carefully and then unbraze the interconnecting tube at the evaporator connectors 6 Remove the evaporator 7 Re install the components by referring to notes See Fig 16 d y Q 2 4 3 CAPILLARY TUBE 1 Remove the cabinet Refer to section 2 1 2 2 Remove the brace Refer to section 2 2 1 3 After discharging the refrigerant completely unbraze the interconnecting tube at the capillary tube 4 Remove the capillary tube 5 Re install the components by referring to notes EZ JELLIES Figure 16 10 NOTES 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 unbrace the pinch off tubes 3 Solder service valves into the pinch off tube ports leaving the valves
14. UIDE In general possible trouble is classified in two causes 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 Unit runs but poor cooling Ineffective Cooling Check of cold air circulation for smooth flow Dirty indoor coil Heat exchanger Malfunction of fan Clogged of air filter Obstruction at air outlet Stop of auto air swing Correct above trouble Check clogging in refrigeration circuit i Repair clogging in refrigeration circuit Check of outdoor coil heat exchanger amp the fan Check heat load increase operation Check gas leakage Unexpected residue Repair gas leak Overloaded Circuit Replacement of unit if the unit is beyond repair Check of inside gas pressure Adjusting of refrigerant charge Malfunction of compressor Replacement of compressor Satisfactory operation with temperature difference of inlet amp outlet air 44 6 50 F 14 Fails to Start Y Check of po
15. again OPERATION MODE SELECTION BUTTON Select Cooling or Fan or Dehumid mode with button Dehumid mode is not to all models ON OFF TIMER BUTTON Set the time of starting and stopping operation The timer is set by 1 hour FAN SPEED SELECTOR Select the fan speed in two steps Low or High ROOM TEMPERATURE SETTING BUTTON Control the room temperature within a range of 16 C to 30 C AUTO RESTART SWITCH NOT TO ALL MODELS In failure of electric power if the switch is set to ON the unit runs as previous setting operation when power returns AUTO SWING BUTTON Control the horizontal air direcion by air swing system SIGNAL RECEIVER 2 DISASSEMBLY INSTRUCTIONS Before the following disassembly POWER SWITCH is set to OFF and disconnected the power cord 2 1 MECHANICAL PARTS 2 1 1 FRONT GRILLE 1 Open the inlet grille upward or downward Remove the screw which fastens the front grille Pull the front grille from the right side Remove the front grille See Fig 1 Re install the component by referring to the removal procedure NOTE Mark A of inlet grille means opening direction oR OP 2 1 2 CABINET 1 After disassembling the FRONT GRILLE remove the screws which fasten the cabinet at both sides Keep these for later use 2 Remove the two screws which fasten the cabinet at back See Fig 2 3 Pull the base pan forward 2 1 3 CONTROL BOX 1 Remove the front grille Refer to section 2 1 1 2
16. ck the wiring diagram f 7 Possible Trouble 5 Is the Knob of SW1 NO The function of Energy Saver does not operate Set the Knob of SW1 set to left position Is the voltage No 1 of to left position Check the SW1 CN DISP of Main PCB Ass y DC 5V YES Reference to OWNER S MANUAL Possible Trouble 6 Is the voltage of Battery about over 2 3V 5 the voltage 16 De gt Check the pattern of Main amp Display PCB Romote controller does not operate NO Exchange the battery of CN DISP1 on Main P W B Assy DC 5V NO Is the connection of gt Check the P W B pattern Connect connector to CN DISP1 all right Exchange Receiver Ass y Y CN DISP1 exactly 18 Possible Trouble 7 NO It displays abnormally on Display P W B Ass y gt Exchange ICO1G Is the ICO1G all right NO Is the connection of NO Connect connector CN DISP1 all right YEs Does the Q01G Q02G 0036 0046 operate normally No gt to CN DISP1 exactly on main P W B Ass y Exchange the display P W B Ass y Exchange Q01G 9026 Q03G Q04G 19 ROOM AIR CONDITIONER VOLTAGE LIMITS NA
17. e cabinet Refer to section 2 1 2 2 Remove the brace and shroud cover Refer to section 2 2 1 Remove the 5 screws which fasten the condenser Move the condenser sideways carefully Remove the fan See Fig 7 3 4 5 Remove the clamp which secures the fan 6 7 Re install the components by referring to the removal procedure above Figure 4 a Figure 4 b Figure 5 Figure 6 Figure 7 a Figure 7 b 2 2 4 SHROUD 1 Remove the fan Refer to section 2 2 3 2 Remove the 2 screws which fasten the shroud 3 Remove the shroud See Fig 8 4 Re install the component by referring to the removal procedure above 2 3 ELECTRICAL PARTS 2 3 1 MOTOR 1 Remove the cabinet Refer to section 2 1 2 2 Remove the cover control and disconnect a wire housing in control box Refer to section 2 1 3 3 Remove the blower Refer to section 2 2 2 Remove the fan Refer to section 2 2 3 5 Remove the 4 screws which fasten the motor See Fig 9 6 Remove the motor 7 Re install the components by referring to the removal procedure above gt 2 3 2 COMPRESSOR 1 Remove the cabinet Refer to section 2 1 2 2 Discharge the refrigerant by using a Refrigerant Recovery System 3 Disconnect the 3 leads from the compressor 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 wh
18. ich fasten the compressor See Fig 10 6 Remove the compressor 7 Re instill the components by referring to the removal procedure above 2 3 3 CAPACITOR 1 Remove the control box Refer to section 2 1 3 2 Remove the screw which fasten the display panel 3 Disconnect the 2 leads from the rocker switch and remove the panel 4 Remove a screw and unfold the control box See Fig 11 5 Remove the screw and the clamp which fastens the capacitor See Fig 11 6 Disconnect all the leads of capacitor terminals 7 Re install the components by referring to the removal procedure above Figure 9 Figure 10 g N B E 2 4 x SCH N WW gt T 4 6 s 1 NS AR Vind ES Figure 11 2 3 4 POWER CORD 1 2 SO Ol Remove the control box Refer to section 2 1 3 Unfold the control box Refer to section 2 3 3 3 Disconnect the grounding screw from the control box Disconnect 2 receptacles Remove a screw which fastens the clip cord Pull the power cord See Fig 12 Re install the component by referring to the removal procedure above Use only one ground marked hole for ground connection 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 supply cord fitted to
19. load if externally mounted Replace if open If the compressor temperature is high remove the overload cool and retest Compressor cycles on Voltage Check the voltage See the limits on the overload preceding page If voltage is not within these 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 21 COMPLAINT CAUSE REMEDY Compressor cycles on overload Insufficient cooling Fan motor If not running determine the cause Replace if required Condenser air flow restriction Condenser fins Remove the cabinet inspect the interior surface ofthe condenser If restricted clean carefully with a vacuum cleaner do not damage fins or brush Clean the interior base before re assembling If the condenser fins are closed over a large damaged area on the coil surface head pressures will increase causing the compressor to cycle Straighten the fins or replace the coil Capacitor Test the capacitor Wiring Check the terminals If loose repair or replace Refrigeration system Air filter Exhaust damper door Check the system for a restriction If restricted clean or replace Close if open Unit undersized Determine if the unit is properly sized for the area to be cooled Excessive noise Blower or fan Check the set screw or clamp
20. open 4 Solder the pinch off tubes with Service valves 5 Evacuate as follows 1 Connect the vacuum pump as illustrated Fig 17A 2 Start the vacuum pump slowly open manifold valves A and B with two full turns counterclockwise and leave the valves closed The vacuum pump is now pulling through valves A and B up to valve C by means of the manifold and entire system N CAUTION If high vacuum equipment is used just crack valves A and B for a few minutes then open slowly with the two full turns counterclockwise This will keep oil from foaming and being drawn into the vacuum pump 3 Operate the vacuum pump for 20 to 30 minutes until 600 microns of vacuum is obtained Close valves A and B and observe vacuum gauge for a few minutes A rise in pressure 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 Fig 17B Open valve C Discharge the line at the manifold connection 5 The system is now for final charging 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 Fig 17B With valve C open discharge the
21. pM OSSA ee see NM e d 10 3 INSTALLATION Sz OW tion tb ae 13 3 2 HOW USE THE REVERSIBLE INLET GRILLE 13 ad WINDOW REQUIRE sided ds nenn 14 34 INSTALLATIONIKITS CONTEN Send vtt ee 14 3 5 SUGGESTED TOOL REQUIREMENTS dier Ro esed tdt dtu 15 3 6 CAB INE MINS TAL EA ION eu 16 4 TROUBLESHOOTING GUIDE Ad DUISIDEPIMENSIONSA 18 A A PIRING ee a E 18 ACS TROUBLESHOOTING ne er O 19 5 SCHEMATIC DIAGRAM SI CIRCUIT DIAGRAM En a a 28 5 2 EDEGTRONIG CONTROL De VICE edge ee 29 5 3 COMPONENTS LOCATION FOR MAIN P C B ASM ssssesessssssssssssessseseseseseseeceecceccecececcassssstsssssannsntaninananitisutssseeeee 30 5 4 COMPONENTS LOCATION FOR DISPLAY P C B ASM 30 EXPEODED VIEW 31 7 REPLACEMENT PARTS LIST 32 1 PREFACE This service manual provides various service information including the mechanical and electrical parts etc This room air conditioner was manufactured and assembled under a strict quality control system The refrigerant is charged at the factory Be sure to read the safety precautions prior to servicing the unit 1 1 SAFETY PRECAUTIONS 1 2 INSULATION RESIST
22. rans NO M Exchange 0020 0050 Is output Voltage of ICO1D e Exchange ICO1D DC 12V NO Is output Voltage of ICO2D Exchange ICO2D DC 5V 5 the reset circuit all right NO The No 14 of Micom Exchange is 5V YES Is the connection between Main and Display all right NO Connect connector exactly NO Check the P W B pattern Exchange Main P W B 5 16 Possible Trouble 2 The compressor does not operate setting set lower than Roo Set Temp setting to higher Temp Is the voltage No 10 NO of ICO1M Is the voltage NO 7 of DC 5V Is the Unit for 3 minutes delay Check the RY COMP Exchange ICO1M Wait 3 Minutes Check the wiring Diagram Exchange MAIN P W B Ass y Possible Trouble 3 The compressor always operate Is the wire connection of NO LEAD IG TD RY COMP all right res Check RY COMP Possible Trouble 4 Fan does not operate N 9 e Exchange ICO1M s the voltage or 2 or 4 of ICO1M DC 5V Is the voltage NO 13 or 15 or 16 NO Exchange ICO1M of ICO1M 0V ves Check the RY Hi or RY Lo Che
23. sired position The 5 or 6 position is a normal setting for average conditions OPERATION OFF Turns the air conditioner off MED Permits the medium fan speed operation without cooling LOW Permits the low fan speed operation without cooling HIGH COOL Permits cooling with the high fan speed operation MED COOL Permits cooling with the medium fan speed operation LOW COOL Permits cooling with the low fan speed operation Side air intake side cooled air discharge Built in adjustable THERMISTOR Washable one touch filter Compact size CLOSE VENT OPEN AUTO SWING Air swing is operated while OPERATION knob is set to the COOL position OFF Stops the operation of air swing Thermostat Operation Auto Swing Off Low Cool see to 2 5 DISPLAY REMOTE CONTROL Auto Auto OT Restart Ventilacion Frio Encendido Deshumedad Auto Encendido Deflector Precaution The Remote Control unit will not function properly if strong light strikes the sensor window of the air 9 conditioner or ifthere obstacles between the Remote Control unit and the air conditioner POWER BUTTON Operation starts when this button is pressed and stops when you press the button
24. website http biz lgservice com e mail http www lgeservice com techsup html CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL ONLY FOR AUTHORIZED SERVICE MODELS LWC183MGMJ1 LWC183MSMM1 LWC183MGAB1 5 1 PREFACE IR SAFETY PRECAUTIONS leere e 3 BEUNSULAPIONRESISTANGE TEST se len 3 153 se ee har si 3 een ri 4 1SCONBOLLOCATONS Fee ee Mensen teten 4 2 DISASSEMBLY INSTRUCTIONS Ba 6 6 e 6 ee nenn nee 6 SE AIR HANDUING PARTS 7 22 THE TOP ae ee en ee 7 e BEE AEAN 7 IAIN aa a een 7 BD APPL OW eaedem duke td 8 SSELEGTIRICAL PARTS ever atat eek 8 catio uto men 8 23 2 CONPRESSOR en aa uta 8 Ba S CAPABITORV Ou s acd ione d aU ei 8 BSA POWER CORD uae cuu at tied dn Rida a MR 9 2 3 5 THERAN TO Lat dta uas 9 ee E ef 9 FA Fr IGE ATION rl ema es dispen 10 DA KON DEN ER od 10 DIE VAPORHATOB aient eta ee d mtem tta utut nc du QS M DUM uL 10 BA S CAPILLARY TUBE aan Dad d
25. wer source Check of control switch setting Only compressor fails to start Drop of power voltage Defect of compressor Check capacitor Replacement Check of circuit breaker and fuse Check of control panel Only fan fails to start Improper wiring Improper thermistor setting Defect of fan motor Loose terminal connection capacitor gt Improper wiring Irregular motor resistance Q Irregular motor insulation Q Y Replacement of fan motor Irregular motor resistance Q Irregular motor insulation Y Replacement of compressor Motor damaged 15 Regular but fails to start Replacement of compressor locking of rotor metal ELECTRIC PARTS TROUBLESHOOTING GUIDE MODEL LWC183MGMJ1 LWC183MSMM1 Possible Trouble 1 The unit does not operate NO Check the Fuse Is the Trans output power the OP Check the wiring diagram same as specified Yes Check the Main Is the Trans output power P W B pattern about AC 14V Is shorted the Trans output gt Exchange the T

ROOM AIR CONDITIONER SERVICE MANUAL

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