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LG LWHD7000HR Service Manual

Room air conditioner
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LG Room
Air Conditioner

SERVICE MANUAL

MODEL: LWHD7000HR, LWHD1200HR
website http://www.lgservice.com
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
LG

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  Summary of Contents for LG LWHD7000HR

  • Page 1: Service Manual

    LG Room Air Conditioner SERVICE MANUAL MODEL: LWHD7000HR, LWHD1200HR CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
  • Page 2: Table Of Contents

    Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions............................3 Dimensions ..............................5 Symbils Used in this Manual ........................5 Outside Dimensions ...........................5 Product Specifications ..........................6 Installation ...............................7 Select the Best Location ...........................7 Installation Check ............................7 How to Secure the Drain Pipe(When using drain pipe)................7 How to Install(Models without Installation Kit) ....................8 How to Install(Models with Installation Kit) ....................9 Suggested Tool Requirements .........................11...
  • Page 3: Safety Precautions

    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. WARNING This symbol indicates the possibility of death or serious injury.
  • Page 4 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.
  • Page 5: Dimensions

    This symbol alerts you to hazards that could cause harm to the air conditioner. This symbol indicates special notes. NOTICE Outside Dimensions On/Off On/Off Fan Cool Heat TIMER ENERGY MODE SAVER Model LWHD7000HR LWHD1200HR Dimension mm(inch) 470(18 600(23 mm(inch) 353(13 380(14 mm(inch) 525(22 567(22 Service Manual 5...
  • Page 6: Product Specifications

    Specfications Product Specifications MODELS LWHD7000HR LWHD1200HR ITEMS 1Ø,115V, 60Hz 1Ø, 208/230V, 60Hz POWER SUPPLY COOLING CAPACITY (Btu/h) 7,000 11,500/12,000 INPUT 1,170/1,220 5.5/5.8 RUNNING CURRENT E.E.R (BTU/W.h) HEATING CAPACITY (Btu/h) 3850 9,200/11,200 INPUT 1260 2,900/3,500 11.0 14.0/15.3 RUNNING CURRENT INDOOR(°C) 26.7 (DB)* 19.4 (WB)** COOLING OUTDOOR(°C)
  • Page 7: Installation

    Installation Installation 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 sunlight does not shine directly FENCE on the unit. AWNING 3.The outside of the cabinet must extend outward for at COOLED AIR least 12"...
  • Page 8: How To Install(Models Without Installation Kit)

    Installation How to Install(Models without Installation Kit) 1. Remove the screws that fasten the cabinet Shipping screws at both sides and at the back. On/O On/O Cool TIM ER ENE RGY Heat SAV ER 2. Slide the unit from the cabinet by gripping MO DE the base pan handle and pulling forward while bracing the cabinet.
  • Page 9: How To Install(Models With Installation Kit)

    Installation How to Install(Models with Installaion Kit) When Using Gasket LWHD1200HR RIGHT SIDE HORIZONTAL LINE 1. WINDOW (WIDTH-A, HEIGHT-B) 4. DETAILS 5.1 x 30 ROUND HEAD WOOD SCREWS 2. GASKET 3. WALL 625mm 392mm 280mm 30mm 0~25mm OVER 420mm 5~10mm -5~5mm ") ")
  • Page 10 Installation LWHD7000HR RIGHT SIDE On/Off On/Off Fan Cool Heat TIMER ENERGY SAVER MODE HORIZONTAL LINE 1. WINDOW (WIDTH-A, HEIGHT-B) 4. DETAILS 5.1 x 30 ROUND HEAD WOOD SCREWS 2. GASKET 3. WALL 495mm 366mm 250mm 30mm 0~25mm OVER 420mm 12mm...
  • Page 11: Suggested Tool Requirements

    Installation Suggested Tool Requirements SCREWDRIVER (+, -), RULER, KNIFE, HAMMER, PENCIL, LEVEL Shipping screws Preparation of Chassis 1. Remove the screws that fasten the cabinet at both sides and at the back. 2. Slide the unit out from the cabinet by gripping the On/Of On/Of Cool...
  • Page 12 Installation 3. Loosely assemble the sill support using the parts INDOOR OUTDOOR Figure Sill Support Bolt Figure 4 4. Select the position that will place the sill support near the outer most point on sill (See Figure Frame Guide Screw(Type A) Be careful when you install the cabinet NOTICE (Frame Guides...
  • Page 13 Installation 10. Slide the unit into the cabinet.(See Fig. 8) CAUTION: For security purpose, reinstall screws (Type A) at the cabinet's sides. Power cord On/Off On/Off Cool TIMER ENER SAVE Heat MODE Screw(Type A) Figure 8 Screw(Type A) 11. Cut the Foam-Strip to the proper length and insert between the upper and lower window sash.
  • Page 14: Operation

    2Hours 3Hours 4Hours 5Hours 6Hours 7Hours 8Hours 9Hours 10Hours LWHD7000HR 11Hours 12Hours Cancel) 4. FAN SPEED SELECTOR Everytime you push this button, it is set as follows. (Hi[ Low[ ]..) 5. ROOM TEMPERATURE SETTING BUTTON This button can automatically control the temperature of...
  • Page 15: Disassembly

    Disassembly Disassembly — Before the following disassembly, CONTROL BOX set to OFF and disconnect the power cord. Mechanical Parts 1. Front Grille 1. Open the lnlet grille upward . 2. Remove the screw that fastens the front grille. 3. Pull the front grille from the right side. 4.
  • Page 16: Air Handling Parts

    Disassembly Air Handling Parts 4. Air Guide and Turbo Fan 1. Remove the front grille. (Refer to section 1) 2. Remove the cabinet. (Refer to section 2) 3. Remove the control box. (Refer to section 3) 4. Remove the 4 screws that fasten the brace. 5.
  • Page 17: Electrical Parts

    Disassembly 6. Shroud 1. Remove the fan. (Refer to section 5) 2. Remove the screw that fastens the shroud. 3. Remove the shroud. (See Figure 21) 4. Re-install the component by referring to the removal procedure, above. Figure 21 Electrical Parts 7.
  • Page 18 Disassembly 9. Capacitor 1. Remove the control box. (Refer to section 3) 2. Remove the knobs and the screw that fasten control panel from control box. 3. Remove the screw that located in the front. 4. Open the bottom side of control box. 5.
  • Page 19: Refrigerating Cycle

    Disassembly 13. Motor 1. Remove the cabinet. (Refer to section 2) 2. Remove the evaporator. (Refer to section 4) 3. Remove the orifice. (Refer to section 4) 4. Remove the blower. (Refer to section 4) 5. Remove the fan. (Refer to section 5) 6.
  • Page 20: Capillary Tube

    Disassembly 16. Capillary Tube 3. Remove the capillary tube. 1. Remove the cabinet. (Refer to section 2) 4. Re-install the component by referring to notes. 2. After discharging the refrigerant completely, unbraze the interconnecting tube at the capil- lary tube.(See caution above) NOTICE —...
  • Page 21 Disassembly Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pin-off tool capable of making a leak-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve. Figure 31B-Charging Figure 31A-Pulling Vacuum Service Manual 21...
  • Page 22: Schematic Diagram

    Schematic Diagram Schematic Diagram Wiring Diagram ELECTRIC HEATING MODEL 22 Room Air Conditioner...
  • Page 23: Troubleshooting Guide

    Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER COIL CAPILLARY TUBE MOTOR COMPRESSOR BLOWER EVAPORATOR COIL Figure 32 is a brief description of the important components 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. ROOM AIR CONITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS...
  • Page 24: Troubleshooting Guide

    Troubleshooting Guide 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. Unit runs but poor cooling.
  • Page 25 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. Compressor only fails to Fan only fails to start. start. Improper wiring.
  • Page 26: Room Air Conditioner Voltage Limits

    Troubleshooting Guide Room Air Conditioner Voltage Limits NAME PLATE RATING MINIMUM MAXIMUM 208~230±10% 187V 253V 115±10% 104V 126V COMPLAINT CAUSE REMEDY Fan motor will not run. No power Check voltage at outlet. Correct if necessary. Power supply cord Check voltage to rotary switch. If none, check power supply cord.
  • Page 27 Troubleshooting Guide COMPLAINT CAUSE REMEDY Thermostat Compressor will not run, Check the position of knob If not at the coldest set- but fan motor runs. ting, advance the knob to this setting and restart unit. Check continuity of the thermostat. Replace ther- mostat if circuit is open.
  • Page 28: Exploded View

    Exploded View Exploded View 559010 359012 753000 753010 147582 135303 552206 W52106-1 W52106-2 249950 W0CZZ 263230 552101 352111 267110 268712 135500 238310 /O ff /O ff TI M 264110 237200 268714 28 Room Air Conditioner...
  • Page 29: Replacement Parts List

    Replacement Parts List Replacement Parts List PART NO. LOCATION REMARK DESCRIPTION LWHD7000HR LWHD1200HR 130410 BASE ASSEMBLY, SINGLE 3041A30005V 3041AR1524T 130910 CABINET ASSEMBLY, SINGLE 3091A10069B 3091A10032Z 135312 GRILLE ASSEMBLY, FRONT(SINGLE) 3531A10128C 3531A20136E 135313 GRILLE ASSEMBLY, INLET 3530A10027A 3530AR1634A 135500 COVER 3550A20115A...
  • Page 30 May, 2006 P/No.: 3828A20841A Printed in Korea...

This manual is also suitable for:

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