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Air Conditioner
LG Electronics
- page 51
Models:
LA090HPO
LA120CPI
LA120CPO
LA120HPI
LA120HPO
1
51
76
76
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76 pages, 13.01 Mb
Service Manual
51
Schematic Diagram
DISPLAY P
.W
.B. ASM
•
P/No.: 6871A20921A (PCB ASSEMBLY)
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
Service Manual 11
Product Specifications
AS-H121F2G0(LA120HP)
AS-H091F2G0(LA090HP) AS-H121F2G0(LA121HNP)
Product Specifications
Models
AS-C091F2G0(LA091CNP) AS-C091F2G0(LA090CP) AS-C121F2G0(LA121CNP)
Installation
Installation Parts
Installation Tools
Read carefully, and then follow step by step.
Installation Map
NOTICE
Confirm The Refrigerant
Service Manual 15
Indoor unit
19.6"(50cm)
Select the best Location
More than 7.9"(20cm)
More than 19.6"(50cm) More than 4.9ft(1.5m)
Rooftop Installations
16 Room Air Conditioner
Piping Length and Elevation
Preparing Work for Installation
Fixing Indoor Unit
INSTALLATION GU
Drill a Hole in the Wall
Service Manual 19
Flaring work and connection of piping
Flaring Work
Cutting the pipes and the cable.
Removing burrs
Putting nut on
Connecting the Piping
Service Manual 21
Connecting the piping with the indoor unit and drain hose with drain pipe
Wrap the insulation material around the connecting portion.
Page
Connection of Piping -Outdoor
Outdoor unit
24 Room Air Conditioner
Connecting the cable between indoor unit and outdoor unit
Connecting the Cables
NOTICE
Service Manual 25
Connection method of the connecting cable(Example)
How to connect wiring to the terminals
CAUTION
Service Manual 27
Checking the drainage and forming the pipings
Checking the drainage and forming the pipings
Checking the Drainage
To check the drainage.
Drain piping
Forming the Piping
AIR PURGING
Air Purging
30 Room Air Conditioner
Air purgingd Soap water method
Evacuation
Finishing the job
Service Manual 31
Charging
Example:
Important:
Confirm the refrigerant R-410A. Use manifold gauge and hose for R-410A.
Panel Front Assembly
Service Manual 33
Test running
TEST RUNNING
Test Running
Prepare remote controller
Settlement of outdoor unit
Evaluation of the performance
Page
How to replace picture & photograph
Service Manual 35
How to replace picture & photograph
1. Turn off power and then open
3. Push and close the top part of
Operation
Functions
Indoor Unit
Service Manual 37
Operation
The function of main control
3. Cooling Operation Mode
< Cooling Mode >
< Heating Mode >
1. Time delay Safety Control
38 Room Air Conditioner
Operation
. Auto Operation (Electronic control mode)
Service Manual 39
Operation
5. Healthy Dehumidification
40 Room Air Conditioner
Operation 6. Heating Operation Mode(only Heating Model)
Service Manual 41
Operation
7. Cooling or Heating Mode with Sleep Mode Auto Control
9. Auto restart
Service Manual 43
Operation
Display Function
Self-diagnosis Function
Signal Receptor
Operation Indication Lamps
44 Room Air Conditioner
Remote Control Operations
Disassembly
Indoor Unit
46 Room Air Conditioner
Disassembly
Service Manual 47
Schematic Diagram
Schematic Diagram
Heat Pump/Cooling Only Series(Indoor Unit)
Page
Page
Page
Page
Page
Page
Troubleshooting Guide
Refrigeration Cycle Diagram
(2) Cooling & Heating Models
INDOOR UNIT OUTDOOR UNIT
(1) Cooling Only Models
Piping Length and Elevation
Pumping Down
3-way Valve
Service Manual 57
Troubleshooting Guide 1) Re-air purging
Procedure
58 Room Air Conditioner
Troubleshooting Guide 2) Balance refrigerant of the 3-way valve
Procedure
Service Manual 59
Troubleshooting Guide
2. Evacuation
Procedure
3. Gas Charging
CAUTION
Service Manual 61
Troubleshooting Guide
(According to Indoor & Outdoor Temperature)
Additional gas charging
Operating Suction Pressure (For R410A)
62 Room Air Conditioner
Troubleshooting Guide
Cycle Parts
Trouble analysis
NOTICE
Service Manual 63
Troubleshooting Guide
Electronic Parts (9k model)
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.
Service Manual 69
Troubleshooting Guide
The phenomena in case of connecting error
INDOOR UNIT
70 Room Air Conditioner
Troubleshooting Guide OUTDOOR UNIT
Voltage of Connectors according to Indoor Fan Speed
72 Room Air Conditioner
Exploded View
Exploded View
Indoor Unit
Service Manual 73
Exploded View
2. Outdoor Unit
74 Room Air Conditioner
Replacement Parts List
Replacement Parts List
Parts List(Indoor)
Service Manual 75
Replacement Parts List
Parts List(Outdoor)
