LG LWHD8008R Service Manual

LG LWHD8008R Manual

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  • LG LWHD8008R | Service Manual - Page 1
    website http://www.lgappliances.com LG LG Room Air Conditioner SERVICE MANUAL MODELS: LWHD8008R CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
  • LG LWHD8008R | Service Manual - Page 2
    ...3 1.2 SPECIFICATIONS ...3 1.3 LOCATIONS OF CONTROLS ...4 1.4 SAFETY PRECAUTIONS ...4 1.5 INSULATION RESISTANCE TEST ...4 2. DISASSEMBLY INSTRUCTIONS 5 2.1 MECHANICAL PARTS ...5 2.1.1 FRONT GRILLE ...5 2.1.2 CABINET...5 2.1.3 CONTROL BOARD ...5 2.2 AIR HANDLING PARTS ...6 2.2.1 AIR GUIDE UPPER
  • LG LWHD8008R | Service Manual - Page 3
    to servicing the unit. 1.1 FEATURES • DESIGNED FOR COOLING ONLY • POWERFUL AND INCREDIBLE COOLING • TOP-DOWN CHASSIS FOR THE SIMPLE INSTALLATION AND SERVICE • BUILT-IN ADJUSTABLE THERMOSTAT • WASHABLE ONE-TOUCH FILTER • COMPACT SIZE 1.2 SPECIFICATIONS ITEMS MODELS COOLING CAPACITY (BTU/h) POWER
  • LG LWHD8008R | Service Manual - Page 4
    to servicing the unit. 1.1 FEATURES • DESIGNED FOR COOLING ONLY • POWERFUL AND INCREDIBLE COOLING • TOP-DOWN CHASSIS FOR THE SIMPLE INSTALLATION AND SERVICE • BUILT-IN ADJUSTABLE THERMOSTAT • WASHABLE ONE-TOUCH FILTER • COMPACT SIZE 1.2 SPECIFICATIONS ITEMS MODELS COOLING CAPACITY (BTU/h) POWER
  • LG LWHD8008R | Service Manual - Page 5
    switching the air conditioner from Cool to Off or Fan, wait at least 3 minutes before switching it back to Cool. 1.4 SAFETY PRECAUTIONS 1. When servicing, set the ROTARY SWITCH to Off and unplug the power cord. 2. Observe the original lead dress. If a short circuit is found, replace all parts which
  • LG LWHD8008R | Service Manual - Page 6
    2.1.2) 4. Remove 2 screws that secure the control board to base pan and air guide. (See Figure 4) 5. Pull the control board toward yourself. NOTE : Controls, wires, and capacitor are now accessible for servicing. Discharge the capacitor before servicing. See step 2.3.3 on page 8 for procedures
  • LG LWHD8008R | Service Manual - Page 7
    4. Remove the control board. (Refer to Section 2.1.3) 5. Remove 2 screws that secure the air guide upper to air guide lower. (See Figure 6) 6. Lift air guide upper upward. 7. Re-install by referring to the procedures above. Figure 6 2.2.2 ORIFICE, TURBO FAN AND FAN 1. Disconnect the unit from the
  • LG LWHD8008R | Service Manual - Page 8
    Re-install by referring to the procedures above. Figure 10 2.2.4 AIR GUIDE 1. Disconnect the unit from air guide to the base pan. (See Figure 11) 9. Push the air guide backward and lift it upward. (See Figure 11) 10. Re-install by referring to the procedures above. Figure 11 2.3 ELECTRICAL PARTS
  • LG LWHD8008R | Service Manual - Page 9
    Section 2.1.2) 2. Remove the control board. (Refer to Section 2.1.3) 3. Discharge the capacitor by placing a 20 KΩ resistor across the capacitor terminals. 4. Remove the screw which fastens the capacitor clamp. 5. Remove all the leads of capacitor terminals. 6. Re-install the components by referring
  • LG LWHD8008R | Service Manual - Page 10
    . 8. Pull the power cord. 9. Re-install by referring to procedures above. Figure 18 2.4 REFRIGERANT CYCLE 2.4.1 CONDENSER 1. Remove the cabinet. (Refer to Section 2.1.2) 2. Discharge the refrigerant by using a refrigerant recovery system. 3. Remove the air guide. (Refer to Section 2.2.1) 4. Remove
  • LG LWHD8008R | Service Manual - Page 11
    air guide upper. (Refer to Section 2.2.1) 4. After discharging the refrigerant completely, unbraze the interconnecting tube of the capillary tube. 5. Remove the capillary tube. 6. Re-install in figure 21A. 6-2. Start the vacuum pump. tube closed. Turn off the unit, allow setting for a while and then
  • LG LWHD8008R | Service Manual - Page 12
    equipment, pinch-off tool capable of making a vapor proof seal, leak detector, tubing cutter, hand tools to remove components and service valve. COMPOUND GAUGE MANIFOLD GAUGE B A CONDENSER (HIGH PRESSURE SIDE) COMPRESSOR SEE INSETS BELOW EVAPORATOR (LOW PRESSURE SIDE) CAPILLARY TUBE LO
  • LG LWHD8008R | Service Manual - Page 13
    This air conditioner is designed with a button-down chassis so it can be easily installed in a window. 3.1 SELECT THE BEST LOCATION 1. To prevent vibration and noise, make sure the unit is installed securely and firmly. 2. Install the unit where the sun does not shine directly on the unit. 3. The
  • LG LWHD8008R | Service Manual - Page 14
    adhesive backed) TYPE F: 2EA (GUIDE PANEL) 3.2.2 BEFORE INSTALLATION 1. Insert the guide panels into the guides of the air conditioner. Fasten the curtains to the unit with screws (TYPE A) as shown Figure. 25. 2. Cut the adhesive-backed seal strip (TYPE D) to the window width. Remove the backing
  • LG LWHD8008R | Service Manual - Page 15
    3. INSTALL THE AIR CONDITIONER IN THE WINDOW a. Carefully lift the air conditioner and slide it into the open window. Make sure the bottom guide of the air conditioner drops into the notches of the L bracket. See Figure. 28. IMPORTANT : When the air conditioner drops into the L bracket, the air
  • LG LWHD8008R | Service Manual - Page 16
    installed through the top and bottom of the guide panels, and save for reinstallation later. Close the guide panels. Keeping a firm grip on the air conditioner, raise the sash, and carefully tilt the air conditioner backward, draining any condensate water. Lift the air conditioner from the window
  • LG LWHD8008R | Service Manual - Page 17
    in the cooling cycle. ROOM AIR CONDITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS COOLED AIR COMPLETE LIQUID BOIL OFF POINT SUCTION LINE COOL LOW PRESSURE VAPOR ROOM AIR HEAT LOAD CONDENSER COILS VAPOR INLET HOT DISCHARGED AIR OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH LIQUID
  • LG LWHD8008R | Service Manual - Page 18
    4.3 TROUBLESHOOTING GUIDE In general, possible trouble is classified in two kinds. The one is called Starting Failure which is caused by an electrical defect. The other is Ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application. Unit is running but
  • LG LWHD8008R | Service Manual - Page 19
    Check of power source. Check of control switch setting. Fails to Start Compressor fails only to start. Drop of power voltage. Defect of compressor capacitor. Capacitor check. Replacement. Improper thermostat setting Loose terminal connection Improper wiring Irregular motor resistance (Ω)
  • LG LWHD8008R | Service Manual - Page 20
    ROOM AIR CONDITIONER VOLTAGE LIMITS NAME PLATE RATING MINIMUM 115V ± 10% 103.5V MAXIMUM 126.5V COMPLAINT Fan motor will not run. Fan motor runs. CAUSE No power Power supply cord Rotary switch Wire disconnected or connection loose Capacitor (Discharge capacitor before testing.) Will not rotate
  • LG LWHD8008R | Service Manual - Page 21
    of knob. If not at the coldest setting, advance the knob to this setting and restart the unit. Check the continuity of the thermostat. Replace the thermostat if the circuit is open. Capacitor (discharge capacitor before servicing.) Check the capacitor. Replace if not within ±10% of manufacturer
  • LG LWHD8008R | Service Manual - Page 22
    COMPLAINT Compressor cycles on overload. CAUSE Fan motor Condenser air flow restriction Insufficient cooling Excessive noise Condenser fins (damaged) Capacitor Wiring Refrigeration system Air filter Unit undersized Blower or fan Copper tubing REMEDY If not running, determine the cause. Replace
  • LG LWHD8008R | Service Manual - Page 23
    2 H BK BK 3 4 L RD RD 4 5 6 M BL BL MOTOR 2 7 8 OR(BR) YL CAPACITOR YL F OR(BR) C 6 R BK BK 3 COMP. S RD RD H BR C BR BL BL OLP 7 COMPRESSOR 4 ROTARY SWITCH 5 THERMOSTAT 6 CAPACITOR 7 OVERLOAD PROTECTOR PART NO. 2H00677P 4681A10016C 2520UCAA003 2H00154H 2H01109H
  • LG LWHD8008R | Service Manual - Page 24
    6. EXPLODED VIEW 749740 130910 267110 554030 559011 149980 W48602 349480 147582-1 152302 731273 135312 145200 147582-2 352390-1 359012 W48602 135301 354210 135313 346811 352390-2 130410 264110 W0CZZ 249940 237200 249950 268711-2 238310 268711-1 263230 550140 -23- 567502
  • LG LWHD8008R | Service Manual - Page 25
    5040AR4195A DAMPER,COMPRESSOR 5403A20009N CONDENSER ASSEMBLY,FIRST 2520UABC2JA COMPRESSOR SET,KOREA 5901A20011B FAN ASSEMBLY,AXIAL 6750U-L050A OVERLOAD PROTECT 3127A20074A INSTALL PART ASSEMBLY,SINGLE 5210AR3196C 0CZZA20005B GUIDE CAPACITOR,FILM，BOX 3H02932B CLAMP,SPRING REMARK
  • LG LWHD8008R | Service Manual - Page 26
    ,VERITCAL SHROUD FILTER ASSY,A/C ESCUTCHEON REMOTE CONTROLLER PWB(PCB) ASSEMBLY,DISPLAY PWB(PCB) ASSEMBLY,MAIN THERMISTOR ASSEMBLY MOTOR ASSEMBLY,SINGLE ORIFICE TUBE ASSEMBLY,SUCTION SINGLE TUBE ASSEMBLY,DISCHARGER SINGLE TUBE ASSEMBLY,EVAPORATOR IN AIR GUIDE ASSEMBLY LOWER AIR GUIDE ASSEMBLY UPPER
  • LG LWHD8008R | Service Manual - Page 27
    January, 2008 Printed in China
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LG
Room
Air Conditioner
SERVICE MANUAL
LG
MODELS:
LWHD8008R
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.