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LG Electronics
LA121HPMI, LAN121CNM, LAN121CNM, LAU121CNM, LA121HPMI, LA121HPMO, LAN121HNM, LAU121HNM, LA121CPMI, LA121CPMO, LAU121CNM
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71 pages, 7.27 Mb
Service Manual
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Outdoor(12k)
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Schematic Diagram
Contents
Main
LG
Room Air Conditioner
SERVICE MANUAL
LG
Air Conditioner Service Manual
TABLE OF CONTENTS
Safety Precautions
Installation
Operation
Page
Installation
Operation
Disuse
Dimensions
NOTICE
Indoor Unit
Symbols Used in this Manual
10 Room Air Conditioner
Outdoor Unit
1. 12k
Introduction
Symbols Used In This Manual
Features
Installation
Installation Parts
Read carefully, and then follow step by step.
Installation Tools
Installation Map
NOTICE
Confirm The Refrigerant
Outdoor unit
Rooftop Installations
Indoor unit
Select the Best Location
Piping Length and Elevation
How to Mount Installation Plate
Drill a Hole In The Wall
Flaring Work
Cut the pipes and the cable.
Burrs removal
Putting nut on
Flaring work
Connecting The Piping
For left rear piping
20 Room Air Conditioner
Wrap the insulation material around the connecting portion.
For right rear piping
Route the indoor tubing and the drain hose to the required piping hole position.
Connecting the pipings to the indoor unit and drain hose to drain pipe.
Service Manual 21
Insert the connecting cable into the indoor unit.
Tape the drain hose and the connecting cable.
Connecting the pipings to the indoor unit and the drain hose to drain pipe.
Indoor unit installation
Page
Page
Outdoor unit
Connection of The Drain Hose
Connection of Piping -Outdoor
Connection of The Cable
CAUTION
Service Manual 27
Checking The Drainage
Drain piping
The drain hose should point downward for easy drain flow.
Downward slope
Avoid these situations.
Forming The Piping
Air Purging
Air purging With Vacuum Pump
Preparation
Leak test
Evacuation
Finishing the job
Service Manual 31
Charging
Important:
Test Running
Test Running
32 Room Air Conditioner
Settlement of outdoor unit
Prepare remote control
Operation
DISPLAY
Cooling Mode Operation
Healthy Dehumidification Mode
34 Room Air Conditioner
Operation
Heating Mode Operation
Defrost Control
Page
Page
Self-diagnosis Function
Service Manual 37
Operation
Display Function
1. Heating Model 2. Cooling Model
Remote Control Operations
Operation Mode
Service Manual 39
Disassembly
Disassembly
Indoor Unit
Page
Service Manual 41
Disassembly
5.To remove the Motor Cover
6.To remove the Cross-Flow Fan
Troubleshooting Guide
(1) Cooling Only Models
(2) Cooling & Heating Models
INDOOR UNIT OUTDOOR UNIT
Refrigeration Cycle Diagram
2-way, 3-way Valve
Pumping Down
Balance Refrigerant of the 3-way Valve
46 Room Air Conditioner
Troubleshooting Guide
Vacuum pump
Evacuation
Procedure
Gas Charging
48 Room Air Conditioner
Troubleshooting Guide
(According to Indoor & Outdoor Temperature)
Additional gas charging
Operating Suction Pressure (For R410A)
Service Manual 49
Troubleshooting Guide Trouble analysis
Cycle Parts
1.Check temperature difference between intake and discharge air and operating current.
50 Room Air Conditioner
Troubleshooting Guide
Electronic Parts
Product does not operate at all.
(* Refer to Electronic Control Device drawing and Schematic diagram.)
The product is not operate with the remote controller.
Compressor/Outdoor Fan are unable to drive.
When indoor Fan does not operate.
When Vertical Louver does not operate.
When a comunication error occurs.
56 Room Air Conditioner
Troubleshooting Guide
The phenomena in case of connecting error
INDOOR UNIT
Service Manual 57
Troubleshooting Guide
OUTDOOR UNIT
Page
Page
Page
Page
Page
Page
DISPLAY ASSEMBLY
LCD MODULE
Service Manual 65
Product Specifications
Product Specifications
Cooling Only
* Design and specifications subject to change without prior notice for product improvement.
66 Room Air Conditioner
Product Specifications
Cooling & Heating
Service Manual 67
Exploded View
Exploded View
Indoor Unit
68 Room Air Conditioner
Exploded View
Outdoor Unit: 12k Btu/h Seriess
Service Manual 69
Replacement Parts List
Replacement Parts List
Parts List (Indoor)
70 Room Air Conditioner
Replacement Parts List Parts List (Outdoor)