LG WR-8020 Service Manual Download | Manualshive

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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use Only

Fails to Start

Check circuit breaker
and fuse.

Gas leakage of feeler bulb
of thermostat

Check of control switch.

Fan only fails to start.

Improper wiring.

Defect of fan motor
capacitor.

Irregular motor resistance
( ).
Irregular motor insulation
( ).

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.

Capacitor check.

Replacement

Compressor only fails to
start.

Defect of compressor
capacitor.

Check of power source.

Check of control switch
setting.

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Summary of Contents for WR-8020

Page 1: ...r SVC MANUAL Exploded View MODEL R 8000A WR 8020 R 8000AY3 CAUTION Before Servicing the unit read the safety precautions in General SVC manual Only for authorized service personnel Internal Use Only http biz lgservice com ...

Page 2: ...ONTROL DEVICE 25 5 3 COMPONENTS LOCATION OF MAIN P C B ASM 26 5 4 COMPONENTS LOCATION OF DISPLAY P C B ASM 26 6 EXPLODED VIEW 27 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 t...

Page 3: ...IMENSION inch W x H x D mm 8 000 840 800 820 7 4 7 3 7 6 9 5 10 0 9 8 26 7 DB 19 4 WB 35 DB 23 9 WB 385g 13 6 Oz 260g 9 2 Oz 2 ROW 14 STACKS SLIT FIN TYPE 2 ROW 16 STACKS LOUVERED FIN TYPE BLOWER TURBO PROPELLER TYPE FAN WITH SLINGER RING 2 3 6 POLES ROTARY SWITCH THERMOSTAT VERTICAL LOUVER RIGHT LEFT HORIZONTAL LOUVER UP DOWN SLIDE IN OUT CHASSIS OVERLOAD PROTECTOR INTERNAL THERMAL PROTECTOR 3 WI...

Page 4: ...r a cooler temperature in 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 to 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 operat...

Page 5: ...to the removal procedure above 2 1 3 CONTROL BOX 1 Disconnect the unit from the power source 2 Remove the front grille Refer to section 2 1 1 3 Remove the cabinet Refer to section 2 1 2 4 Remove the screw which fastens the control box cover 5 Remove the housing which connects motor wire in the control box 6 Remove the 3 leads from the compressor Refer to section 2 3 1 7 Discharge the capacitor by ...

Page 6: ... 9 Pull out the hook of orifice by pushing the tabs and remove it See Figure 5 10 Remove the clamp with a hand plier which secures the blower 11 Remove the blower 12 Remove the 4 screws which fasten the air guide from the barrier 13 Move the air guide backward pulling out from the base pan 14 Re install the components by referring to the removal procedure above 2 2 2 FAN AND SHROUD 1 Remove the ca...

Page 7: ... before venting the FreonTM Leave the valve in place after servicing the system 3 Remove the overload protector Refer to section 2 3 1 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 6 Remove the compressor See Figure 8 7 Re install the components by referring to the removal ...

Page 8: ... fasten the thermostat 4 Disconnect 2 leads of thermostat terminals 5 Remove the thermostat 6 Re install the components by refereing to the above removal procedure See Figure 11 2 3 6 ROTARY SWITCH 1 Remove the control box Refer to section 2 1 3 2 Open the control box Refer to section 2 3 3 3 Remove the 2 screws which fasten the rotary switch 4 Disconnect all the leads of the rotary switch termina...

Page 9: ...s which fasten the evaporator 3 Move the evaporator sideways carefully Refer to section 2 2 1 4 After discharging the refrigerant completely unbraze the interconnecting tube at the evaporator connections 5 Remove the evaporator carefully 6 Re install the component by referring to notes See Figure 15 2 4 3 CAPILLARY TUBE 1 Remove the cabinet Refer to section 2 1 2 2 After discharging the refrigeran...

Page 10: ... See figure 16B Open valve C Discharge the line at the manifold 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 ...

Page 11: ...e Brazing equipment Pin off tool capable of making a vapor 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 16A Pulling Vacuum Figure 16B Charging A B EXTERNAL VACUUM PUMP A CHARGING CYLINDER LOW HI B C ...

Page 12: ...setting conditions must be checked prior to initial starting The undermentioned items are especially important checking 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 3 To avoid vibration or noise make sure the air conditioner is installed securely 4 Avoid pla...

Page 13: ... C H J 2 3 4 2 1 G A RIGHT SIDE HORIZONTAL LINE B 1 WINDOW WIDTH A HEIGHT B 2 GASKET 3 WALL 4 DETAILS 5 1 x 30 ROUND HEAD WOOD SCREWS A B C D E F G H J K 495mm 366mm 250mm 30mm 0 25mm OVER 420mm 12mm 32mm 5 10mm 0 5mm 191 2 147 16 10 11 16 0 1 OVER 1617 32 1 2 11 4 3 16 3 8 0 3 16 1 2 3 4 8 13 10 7 6 5 9 12 11 B INSTALLATION KITS CONTENTS 22 to 36 Stool Interior wall 181 2 min Without frame curtai...

Page 14: ...per guide onto the top of the cabinet with 3 type A screws 6 Insert the frame guides into the bottom of the cabinet 7 Insert the Frame Curtain into the upper guide and frame guides 8 Fasten the curtains to the unit with 4 Type A screws CABINET INSTALLATION 1 Open the window Mark a line on center of the window stool or desired air conditioner location Carefully place the cabinet on the window stool...

Page 15: ... 5 Attach the sill support to the cabinet track hole in relation to the selected position using 2 Type A screws in each support See Figure 23 6 The cabinet should be installed with a very slight tilt about 1 2 downward toward the outside See Figure 24 Adjust the bolt and the nut of sill support for balancing the cabinet 7 Attach the cabinet to the window stool by driving the screws Type B Length s...

Page 16: ...and the lower window sash See Figure 27 12 Attach the window locking bracket with a type C screw See Figure 28 13 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 Figure 29 14 Lift the inlet grille and secure it with a type A screw through the front grille See Figure 30 15 Window in...

Page 17: ...te the inlet grille 180 degrees and insert the hooks into the lower holes of front grille Then insert the filter See Figure 32 33 2 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 Figue 34 3 Lift the inlet grille and secure it with a type A screw through the front grille See Figure...

Page 18: ... 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 REFRIGERANT LOW PRESSURE VAPOR ROOM AIR CONITIONER EVAPORATOR COILS CONDENSER COILS CYCLE OF REFRIGERATI...

Page 19: ...r coil heat exchanger the fan operation Check gas leakage Repair gas leak Replacement of unit if the unit is beyond repair Satisfactory operation with temperature difference of inlet outlet air 44 50 F 7 10 C Check heat load increase Clean condenser Not on separate circuit Check inside gas pressure Adjusting of refrigerant charged Malfunction of compressor Replacement of compressor Check cold air ...

Page 20: ...pacitor Irregular motor resistance Irregular motor insulation 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 Capacitor check Replacement Compressor only fails t...

Page 21: ...shorted open or damaged 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 Check voltage If not within limits call an electrician Test...

Page 22: ...ace the switch if circuit is open Check the position of knob If not at the coldest setting advance the knob to this setting and restart unit Check continuity of the thermostat Replace thermostat if circuit is open Check the capacitor Replace if not within 10 of manufacturers rating Replace if shorted open or damaged Check the compressor for open circuit or ground If open or grounded replace the co...

Page 23: ...en the fins or replace the coil Test capacitor Check the terminals If loose repair or replace Check the system for a restriction If restricted clean of replace Close if open Determine if the unit is properly sized for the area to be cooled Check the set screw or clamp If loose or missing correct If the blower or fan is hitting air guide rearrange the air handling parts Remove the cabinet carefully...

Page 24: ...8020 R 8000AY3 PART NO 2H00677P 2H00598E 4681A20027B 4681A20073A 6120AR2359V 2H01109L 6750A30001A N 5416A20013B 5416A20014B POWER CORD ROTARY SWITCH FAN MOTOR CAPACITOR THERMOSTAT OVERLOAD PROTECTOR COMPRESSOR 1 2 3 4 5 6 7 1 1 1 1 1 1 1 S S S S S S S LOCATION NO DESCRIPTION RE MARKS Q TY PERSET 1 3 6 4 2 7 5 MOTOR COMP P T C BR YL S Service Parts N Non Service Parts ...

Page 25: ... 25 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 5 2 ELECTRONIC CONTROL DEVICE ...

Page 26: ...26 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 5 3 COMPONENTS LOCATION OF MAIN P C B ASM 5 4 COMPONENTS LOCATION OF DISPLAY P C B ASM ...

Page 27: ...or training and service purposes LGE Internal Use Only 147582 731273 354210 135312 352111 135313 152302 359012 349001 130910 346811 349600 352390 559011 349480 352115 35211A 554030 567502 554160 352113 550140 130410 147581 269300 266003 W0CZZ 135500 264110 137215 266002 249950 149410 146812 ...

Page 28: ...ice purposes LGE Internal Use Only 6 EXPLODED VIEW LWG0810ACP 147582 731273 354210 135312 352111 135313 152302 359012 349001 130910 346811 349600 352390 559011 349480 352115 35211A 554030 567502 554160 352113 550140 130410 269300 266003 W0CZZ 135500 264110 137215 249950 149410 147581 ...

Page 29: ...P NO 3828A20247A March 2008 ...

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