LG Electronics LAN181CNW, LAU181CNW, LA180CPI, LA180CPO

68 Room Air Conditioner

Schematic Diagram

Outdoor Unit

Contents

Main LG Room Air Conditioner SERVICE MANUAL LG TABLE OF CONTENTS Service Manual 3 Details of 2006 LG Model Name 12 Details of 2006 LG Model Name 345678910 - Safety Precautions Installation Operation Page Installation Operation Disuse 10 Room Air Conditioner Functions Functions Indoor Unit Service Manual 11 Functions Remote Control 12 Room Air Conditioner Product References Product References Dimensions 14 Room Air Conditioner Dimensions Outdoor Unit Gas side 3-way valve Liquid side 2-way valve Service Manual 15 Refrigeration Cycle Diagram INDOOR UNIT Refrigeration Cycle Diagram Cooling Only Models Page Service Manual 17 DISPLAY Cooling Mode Operation Healthy Dehumidification Mode Operation Details MAIN UNIT FUNCTION 18 Room Air Conditioner Heating Mode Operation Defrost Control Service Manual 19 Fuzzy Operation (C/O Model) Fuzzy Operation (H/P Model) 20 Room Air Conditioner Airflow Speed Selection On-Timer Operation Page Page Service Manual 23 Display Function 1. Heating Model 2. Cooling Model Display Function Self-diagnosis Function Introduction Symbols used in this Manual Features Installation Read carefully, and then follow step by step. Installation Parts Installation Tools Installation Map NOTICE Confirm The Refrigerant 28 Room Air Conditioner Installation Installation of indoor, Outdoor unit 1) Select the best location 2) Piping length and elevation Service Manual 29 Installation 3) Preparing work for Installation 30 Room Air Conditioner Installation 4) How to fix installation plate A B 5) Preparing work for installation Flaring Work and Connection of Piping 2) Connection of piping Indoor Page CAUTION 34 Room Air Conditioner Installation Connecting The Cable Between Indoor Unit and Outdoor Unit 1) Connection of the cable Service Manual 35 Installation 2) Connection method of the connecting cable(Example) Page Service Manual 37 Installation 2) Form the piping Checking the Drainage and forming the pipings 1) Checking the drainage 38 Room Air Conditioner Installation CAUTION 3) Connect the cable to the indoor unit Service Manual 39 Installation Air Purging 1) Air purging 2) Air purging with vacuum pump 40 Room Air Conditioner Installation Soap water method Panel Front Assembly 42 Room Air Conditioner Installation Test Running PUMP DOWN Service Manual 43 Operation Operation Mode Operation Remote Control Operations 44 Room Air Conditioner Disassembly of the parts (Indoor unit) Disassembly of the parts (Indoor unit) Service Manual 45 Disassembly of the parts (Indoor unit) 2-way, 3-way Valve Service Manual 47 2-way, 3-way Valve 1. Air purging Procedure Caution 2. Pumping down Service Manual 49 2-way, 3-way Valve 1) Re-air purging Procedure 50 Room Air Conditioner 2-way, 3-way Valve 2) Balance refrigerant of the 2-way, 3-way valves Procedure Service Manual 51 2-way, 3-way Valve 3. Evacuation Procedure Use vacuum pump equipped with check value applied to be prevented from flowing backward. 4. Gas Charging This unit is charged with R-410A. Pay attention not to charge R-22. Service Manual 53 2-way, 3-way Valve (According to Indoor & Outdoor Temperature) Operating Suction Pressure (For R410A) Cycle Troubleshooting Guide 54 Room Air Conditioner 1. Trouble analysis Service Manual 55 56 Room Air Conditioner 3. The product is not operate with the remote controller. Service Manual 57 4. Compressor/Outdoor Fan are unable to drive. 58 Room Air Conditioner 5. When Indoor Fan does not operate. Service Manual 59 6. When Vertical Louver does not operate. Page Service Manual 61 8. The phenomena in case of connecting error INDOOR UNIT 62 Room Air Conditioner OUTDOOR UNIT Service Manual 63 9. Voltage of Connectors according to Indoor Fan Speed Electronic Control Device Page Page Service Manual 67 Schematic Diagram receiver CN-LR2(WH) Schematic Diagram Page Exploded View and Replacement Parts List 70 Room Air Conditioner Parts List(indoor) 2. Outdoor unit(18K) 72 Room Air Conditioner Parts List(outdoor)