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4. TROUBLESHOOTING GUIDE

4.1 OUTSIDE DIMENSIONS

675(770)

660

428

CAPILLARY TUBE

COMPRESSOR

BLOWER

EVAPORATOR COIL

CONDENSER COIL

FAN

MOTOR

4.2 PIPING SYSTEM

Following is a brief description of the important components and their functions in the refrigeration system.
Refer to Fig. 35 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle.

MOTOR

COMPRESSOR

OIL

(LIQUID REFRIGERANT)

CAPILLARY TUBE

OUTSIDE COOLING
AIR FOR REFRIGERANT
PASS THROUGH

SUCTION LINE
COOL LOW PRESSURE VAPOR

COOLED
AIR

COMPLETE LIQUID
BOIL OFF POINT

LIQUID
PRESSURE
DROP

ROOM AIR HEAT LOAD

VAPOR INLET

HOT
DISCHARGED
AIR

LIQUID OUTLET

HIGH PRESSURE VAPOR

LIQUID PEFRIGERANT

LOW PRESSURE VAPOR

ROOM AIR CONDITIONER

EVAPORATOR COILS

CONDENSER COILS

CYCLE OF REFRIGERATION

Figure 35

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Содержание LWC243NSAB0 Y5USC18-6A

Страница 1: ...TIONS IN THIS MANUAL ONLY FOR AUTHORIZED SERVICE MODELS R1402 R1802 R1801H M1802 R2102 R2402 R1803 R1804 R1803H M1803R R2103 R2403 LWM1836BCG LWM1836BAG LWM1836BAS LWC243NSAB0 Y5USC18 6A Y5USC24 6A LWN2432BCG LWN2432BAG website http biz LGservice com e mail http www LGEservice com techsup html ...

Страница 2: ...ON FOR MAIN P C B ASM 36 5 4 COMPONENTS LOCATION FOR DISPLAY P C B ASM 37 6 EXPLODED VIEW 38 7 REPLACEMENT PARTS LIST 40 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 safet...

Страница 3: ...CONTROL ROTARY SWITCH ROOM TEMP CONTROL THERMOSTAT VERTICAL LOUVER RIGHT LEFT HORIZONTAL LOUVER UP DOWN CONSTRUCTION SLIDE IN OUT CHASSIS COMPRESSOR FAN MOTOR INTERNAL THERMAL PROTECTOR 1 8m 3WIREWITHGROUNDING 1 6m 3 WIRE WITH GROUNDING 1 3m 3WIREWITHGROUNDING ATTACHMENT PLUG CORD CONNECTED TYPE DRAIN SYSTEM DRAIN PIPE OR SPLASHED BY FAN SLINGER NET WEIGHT lbs kg 117 53 120 54 143 65 146 66 OUTSID...

Страница 4: ...OTARY SWITCH ROOM TEMP CONTROL THERMOSTAT VERTICAL LOUVER RIGHT LEFT HORIZONTAL LOUVER UP DOWN CONSTRUCTION SLIDE IN OUT CHASSIS COMPRESSOR INTERNAL OVERLOAD PROTECTOR FAN MOTOR INTERNAL THERMAL PROTECTOR 1 6m 3 WIRE WITH GROUNDING 1 3m 3WIREWITHGROUNDING ATTACHMENT PLUG CORD CONNECTED TYPE DRAIN SYSTEM DRAIN PIPE OR SPLASHED BY FAN SLINGER NET WEIGHT lbs kg 120 54 143 65 146 66 OUTSIDE DIMENSION ...

Страница 5: ... 9 0 8 3 9 0 9 7 9 800 12 000 3 100 3 670 15 0 16 0 26 7 DB 19 4 WB 35 DB 23 9 WB 21 1 DB 15 6 WB 8 3 DB 6 1 WB 740 26 1 OZ 750 26 5 OZ 3 ROW 15 STACKS 3 ROW 18 STACKS 2 ROW 19 STACKS L BENDED TYPE BLOWER PROPELLER TYPE FAN WITH SLINGER RING 1 2 2 6 POLES ROTARY SWITCH THERMOSTAT VERTICAL LOUVER RIGHT LEFT HORIZONTAL LOUVER UP DOWN SLIDE IN OUT CHASSIS 3 5 KW 230V INTERNAL OVERLOAD PROTECTOR INTER...

Страница 6: ...NTROL THERMISTOR VERTICAL LOUVER RIGHT LEFT HORIZONTAL LOUVER UP DOWN CONSTRUCTION SLIDE IN OUT CHASSIS COMPRESSOR INTERNAL OVERLOAD PROTECTOR FAN MOTOR INTERNAL THERMAL PROTECTOR 1 6m 3 WIRE WITH GROUNDING ATTACHMENT PLUG CORD CONNECTED TYPE DRAIN SYSTEM DRAIN PIPE OR SPLASHED BY FAN SLINGER NET WEIGHT lbs kg 120 54 OUTSIDE DIMENSION inch 26 x 1627 32 x 269 16 W x H x D mm 660 x 428 x 675 M1802 M...

Страница 7: ...lower temperature of the room The temperature is selected by positioning the knob to the desired position The 5 or 6 position is a normal setting for average conditions OPERATION OFF Turns the air conditioner off MED FAN Permits the medium fan speed operation without cooling LOW FAN Permits the low fan speed operation without cooling HIGH COOL Permits cooling with the high fan speed operation MED ...

Страница 8: ... the themostat control anticlockwise OPERATION OFF Turns the air conditioner off FAN Permits the low fan speed operation without cooling heating LOW COOL Permits cooling with the low fan speed operation HIGH COOL Permits cooling with the high fan speed operation LOW HEAT Permits heating with the low fan speed operation HIGH HEAT Permits heating with the high fan speed operation AUTO SWING ON Start...

Страница 9: ...OM TEMPERATURE SETTING BUTTON Control the room temperature within a range of 60 F to 86 F by 1 F ENERGY SAVER The fan stops when the compressor stops cooling Approximately every 3 minutes the fan will turn on and check the room air to determine if cooling is needed AUTO SWING BUTTON Control the horizontal air direction by air swing system 6 6 7 7 Precaution The Remote Control unit will not functio...

Страница 10: ...an forward 2 1 3 CONTROL BOX 1 Remove the front grille Refer to section 2 1 1 2 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 bo...

Страница 11: ...e and the top side See Fig 4 3 Move the evaporator sideward carefully 4 Remove the 2 terminals carefully See Fig 5 Electric Heater Model only 5 Remove the 3 screws which fasten the Heater Cover See Fig 5 Electric Heater Model only 6 Remove the Heater Cover See Fig 5 Electric Heater Model only 7 Remove the orifice from the air guide carefully See Fig 6 Except Electric Heater Model 8 Remove the clam...

Страница 12: ...ol box Refer to section 2 1 3 3 Remove the blower Refer to section 2 2 2 4 Remove the fan Refer to section 2 2 3 5 Remove the 4 screws which fasten the motor See Fig 10 a 10 b 6 Remove the motor 7 Re install the components by referring to the removal procedure above 2 3 2 COMPRESSOR 1 Remove the cabinet Refer to section 2 1 2 2 Discharge the refrigerant system using FreonTM Recovery System If ther...

Страница 13: ... the control box 4 Disconnect 2 receptacles 5 Remove a screw which fastens the clip cord 6 Pull the power cord See Fig 13 7 Re install the component by referring to the removal procedure above Use only one ground marked hole for ground connection 8 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 specificatio...

Страница 14: ...h See Fig 15 6 Re install the components by referring to the above removal procedure above 2 3 7 SYNCHRONOUS MOTOR 1 Remove the control box Refer to section 2 1 3 2 Unfold the control box Refer to section 2 3 3 3 Remove the crankshaft 4 Disconnect all the leads of the synchronous motor 5 Remove the 2 screws which fasten the synchronous motor See Fig 16 6 Re install the components by referring to t...

Страница 15: ... the 3 screws which fasten the evaporator at the left side and the top side 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 18 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 ...

Страница 16: ...ifold connection 5 The system is now ready 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 19B With valve C open discharge the hose a...

Страница 17: ...or proof seal Leak detector Tubing cutter Hand Tools to remove components Service valve A COMPOUND GAUGE EVAPORATOR LOW PRESSURE SIDE COMPRESSOR CAPILLARY TUBE CONDENSER HIGH PRESSURE SIDE SEE INSETS BELOW MANIFOLD GAUGE B Figure 19A Pulling Vacuum Figure 19B Charging A B EXTERNAL VACUUM PUMP A CHARGING CYLINDER LOW HI B C ...

Страница 18: ...wer cord must be connected to an independent circuit The green wire must be grounded 9 Connect the drain tube to the base pan hole in the rear side if you need to drain consult a dealer Plastic hose or equivalent may be connected to the drain tube 3 2 HOW TO USE THE REVERSIBLE INLET GRILLE The grille is designed to clean the filter both upward and downward A BEFORE ATTACHING THE FRONT GRILLE TO TH...

Страница 19: ...to allow a clear vertical opening of 18 from the bottom of the upper sash to the window stool 2 The stool offset height between the stool and sill must be less than 1 1 4 3 4 INSTALLATION KITS CONTENTS 29 to 41 18 min Offset Less than 1 1 4 Sill Exterior Interior wall 26 min Without frame curtain Stool Foam PE Adhesive Backed Foam PE Adhesive Backed Type C 5 Type D 2 Type A 14 Carriage Bolt 2 Lock...

Страница 20: ... the window sash 4 Remove the backing from Foam PE with 3 holes and attach it to the bottom of the Top retainer bar 5 Attach the Top retainer bar onto the top of the cabinet with 3 screws Type A 6 Insert the Frame guides into the bottom of the cabinet 7 Insert the Frame Curtain into the Top retainer bar and Frame guides 8 Fasten the curtains to the unit with 10 screws Type A at both sides SCREWDRI...

Страница 21: ...N Do not drill a hole in the 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 bar until they meet NOTE 1 Do not pull the window sash down so tightly that the movement of Frame curtain is restricted Attach the cabinet to the window stool by driving the screws Type B through the cabinet into window sto...

Страница 22: ... the upper window sash and the lower window sash See Fig 31 9 Attach the Window locking bracket with a screw Type C See Fig 32 10 Attach the front grille to the cabinet by inserting the tabs on the grille into the tabs on the front of the cabinet Push the grille in until it snaps into place See Fig 33 11 Lift the inlet grille and secure it with a screw Type A through the front grille See Fig 33 12...

Страница 23: ...ow the refrigeration cycle and the flow of the refrigerant in the cooling cycle MOTOR COMPRESSOR OIL LIQUID REFRIGERANT CAPILLARY TUBE OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH SUCTION LINE COOL LOW PRESSURE VAPOR COOLED AIR COMPLETE LIQUID BOIL OFF POINT LIQUID PRESSURE DROP ROOM AIR HEAT LOAD VAPOR INLET HOT DISCHARGED AIR LIQUID OUTLET HIGH PRESSURE VAPOR LIQUID PEFRIGERANT LOW PRESSURE ...

Страница 24: ...kage Repair gas leak Replacement of unit if the unit is beyond repair Satisfactory operation with temperature difference of inlet outlet air 44 6 50 F Check heat load increase Unexpected residue Overloaded Circuit Check of inside gas pressure Adjusting of refrigerant charge Malfunction of compressor Replacement of compressor Check of cold air circulation for smooth flow Dirty indoor coil Heat exch...

Страница 25: ...lation Replacement of fan motor Regular but fails to start Replacement of compressor locking of rotor metal Improper thermostat setting Loose terminal connection Improper wiring Irregular motor resistance Irregular motor insulation Replacement of compressor Motor damaged Drop of power voltage Check capacitor Replacement Only compressor fails to start Defect of compressor capacitor Check of power s...

Страница 26: ... bearings if motor shaft will not rotate replace the motor 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 Check grommets if worn or missing replace them If cracked out of balan...

Страница 27: ...essor overload if externally mounted Replace if open If the compressor temperature is high remove the overload cool it and retest Check the voltage See the limits on the preced ing page If not within limits call an electrician Check overload if externally mounted Replace if open If the compressor temperature is high remove the overload cool and retest If not running determine the cause Replace if ...

Страница 28: ...earrange the air handling parts Remove the cabinet and carefully rearrange tubing not to contact cabinet compressor shroud and barrier Set the knob to HIGH COOL or LOW COOL while rocker switch is ON Check terminals If loose repair or replace Check the synchronous motor for open circuit Capacitor Wiring Refrigerating system Air filter Exhaust damper door Unit undersized Blower or fan Copper tubing ...

Страница 29: ... C YL WH ROCKER SWITCH WH BR 1 2 3 BK BR SYNC MOTOR CAPACITOR BK RD BL BK RD BL BR OLP 5 1 3 7 6 2 WIRING DIAGRAM 3584AR2206V 4 8 POWER INPUT BK BR Plain WH BL Ribbed GN GN YL NO 1 2 3 4 5 6 7 8 9 Q TY PER SET 1 1 1 1 1 1 1 1 1 DESCRIPTION POWER CORD ROTARY SWITCH FAN MOTOR CAPACITOR THERMOSTAT COMPRESSOR OVERLOAD PROTECTOR TERMINAL BLOCK SYNCHRONOUS MOTOR ...

Страница 30: ...C243NSAB0 1 3 4 7 2 6 5 WIRING DIACRAM ROCKER SWITCH WH WH SYNC M POWER INPUT WH BL BK BR Ribbed Plain NO 1 2 3 4 5 6 7 Q TY PER SET 1 1 1 1 1 1 1 DESCRIPTION POWER CORD ROTARY SWITCH FAN MOTOR CAPACITOR THERMOSTAT COMPRESSOR SYNCHRONOUS MOTOR ...

Страница 31: ... Y5USC24 6A LWN2432BCG 1 3 4 7 2 6 5 WIRING DIACRAM ROCKER SWITCH WH BR BK BR WH SYNC M POWER INPUT WH BL BK BR Ribbed Plain NO 1 2 3 4 5 6 7 Q TY PER SET 1 1 1 1 1 1 1 DESCRIPTION POWER CORD ROTARY SWITCH FAN MOTOR CAPACITOR THERMOSTAT COMPRESSOR SYNCHRONOUS MOTOR ...

Страница 32: ... WH BR ROCKER SWITCH THERMOSTAT WH BK YL BL RD RD YL C L H 1 3 2 R S C BR YL O L P BK RD RD RD FUSE LINK BI METAL THERMOSTAT HEATER BL BK RD BL BK BR Plain WH BL Ribbed GN GN YL 1 3 4 5 6 8 2 7 9 NO 1 2 3 4 5 6 7 8 9 Q TY PER SET 1 1 1 1 1 1 1 1 1 DESCRIPTION POWER CORD ROTARY SWITCH FAN MOTOR CAPACITOR THERMOSTAT OVERLOAD PROTECTOR COMPRESSOR ELECTRIC HEATER SYNCHRONOUS MOTOR ...

Страница 33: ...N DISP 2 CN SYNC CN DISP 1 RY HI RY LO RY MED BR BR FUSE 250V T2A 3 4 1 7 6 8 5 9 2 3 4 NO 1 2 3 4 5 6 7 8 9 Q TY PER SET 1 1 1 1 1 1 1 1 1 DESCRIPTION POWER CORD FAN MOTOR CAPACITOR COMPRESSOR MAIN PWB ASM DISPLAY PWB ASM THERMISTOR ASM CONNECTOR FUSE ...

Страница 34: ... 34 5 2 ELECTOINC CONTROL DEVICE MODEL M1802 ...

Страница 35: ... 35 MODEL M1803R NOTE 1 The unit of undefined resistors is ohm 1 6W 5 2 The unit of undefined capacitors is uF ...

Страница 36: ...1A 6 CN DISP1 11 CN DISP2 1 IC02D C05D RY COMP PWB ASS Y 6871A10013 PWB P NO 6870A90041A 125V 2A 250V T2A FUSE C01D D05D D04D D03D D02D C03D IC01D 1 J01 OSC01B Q01E CN BK CN BL CN RD ZNR CO1J BUZZER R01J CN SYNC CN WORK POWER TRANS F M RY HI RY MID RY LO RY SYNC 1 4 J02 J03 J04 G F M ...

Страница 37: ... 37 5 4 COMPONENTS LOCATION FOR DISPLAY P C B ASM MODEL M1802 MODEL M1803R PWB P NO 6870A90004D 3 6871A2011B ...

Страница 38: ...552101 552102 753010 554030 148000 352390 349600 346811 130410 354210 149582 349001 249950 249950 359012 349480 W48602 W48602 559010 149980 550140 554160 352115 352113 35211A 352111 263230 268712 146812 264110 268714 237200 238310 W0CZZ 249950 135510 269310 W0CZZ 135510 146812 266003 264110 137215 149410 269310 135510 146812 266003 264110 137215 149410 W0CZZ 130910 753000 ...

Страница 39: ...2111 130910 148000 559011 W48602 554031 349600 352390 346811 149980 130410 149582 W48602 349480 152302 135312 249950 554160 135313 147581 2 147581 1 137215 266002 269310 W0CZZ 266003 135510 264110 146812 354210 149410 359012 349001 MODEL R2402 R2403 Y5USC24 6A LWN2432BCG LWN2432BAG LWC243NSAB0 ...

Страница 40: ... 4960AR1596A R 35211A TUBE ASSEMBLY SUCTION 5211A30088C 5211A30210A 5211A20204A 5211A20204C 5211A30292A 5211A30292D R 352111 TUBE ASSEMBLY CONNECTOR 5211AR7059A 5211AR7059C 5211AR7059H R 352113 TUBE ASSEMBLY DISCHARGE 5211A30066C 5211A30066A 5211A30066K 5211A30293A 5211A30066L R 352115 TUBE EVAPORATOR 5210A30009G H 5210A30144J K 5210A20351B 52B 5211A20433B 34B 5210A30144A B 5210A30144J K R 352390 ...

Страница 41: ...598E R 269310 THERMOSTAT ASSEMBLY 2H01109L R 346811 MOTOR ASSEMBLY SINGLE 4681AR6033K R 349001 DAMPER VENTILATION 4900AR7265A R 349480 ORIFICE 4948A30006A R 349600 MOUNT MOTOR 4960AR1596A R 352111 TUBE ASSEMBLY CONNECTOR 5211AR7059A R 352113 TUBE ASSEMBLY DISCHARGE SINGLE 5211A30066K R 352115 TUBE ASSEMBLY EVAPORATOR IN 5211A20433B R 352115 TUBE ASSEMBLY EVAPORATOR IN 5211A20434B R 35211A TUBE ASS...

Страница 42: ...3A R 349001 DAMPER VENTILATION 4900AR7265A 4900AR7265A 4900AR7265A R 349480 ORIFICE 4948A30006A R 349600 MOUNT MOTOR 4960AR1596A 4960AR1596A 4960A10006A R 35211A TUBE ASSEMBLY SUCTION 5211A30065A 5211A20204A 5211A10094A R 352111 TUBE ASSEMBLY CONNECTOR 5211AR7059C 5211AR7059C 5211AR7059Q R 352113 TUBE ASSEMBLY DISCHARGE 5211A30066A 5211A30066K 5211A30325C R 352115 TUBE EVAPORATOR 5210A30009C D 521...

Страница 43: ...C 6871A10013E R 346811 MOTOR ASSEMBLY SINGLE 4681AR6033K R 349001 DAMPER VENTILATION 4900AR7265A R 349480 ORIFICE 4948AR7241A R 349600 MOUNT MOTOR 4960AR1596A R 35211A TUBE ASSEMBLY SUCTION 5211A30250A 5211A20204A R 352111 TUBE ASSEMBLY CONNECTOR 5211AR7059C R 352113 TUBE ASSEMBLY DISCHARGE 5211A30066A 5211A30066A R 352115 TUBE EVAPORATOR 5210A30144J K 5210A20351B 52B R 354210 EVAPORATOR ASSEMBLY ...

Страница 44: ...A20015G R 266002 SWITCH ROCKER 2H01316C R 266003 SWITCH ROTARY 2H00598E R 269310 THERMOSTAT ASSEMBLY 2H01109L R 346811 MOTOR ASSEMBLY SINGLE 4681A20011C 4681A20043A R 349001 DAMPER VENTILATION 4900AR7265A R 349480 ORIFICE 4948A30006A R 349600 MOUNT MOTOR 4960AR2895A 4960A10006A R 352111 TUBE ASSEMBLY CONNECTOR 5211AR7059J 5211AR7059Q 5211AR7059X R 352113 TUBE ASSEMBLY DISCHARGE 5211A30325A 5211A30...

Страница 45: ...MEMO 45 ...

Страница 46: ... 46 MEMO ...

Страница 47: ...P No 3828A20140A January 2005 Printed in Korea ...

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