LG Universal System Air Conditioner User manual

LG
Universal System
Air Conditioner
SERVICE MANUAL
LG
CAUTION
website http://www.lgservice.com
e-mail http://www.lgeservice.com/techsup.html
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

2Universal System Air Conditioner
TABLE OF CONTENTS
Safety Precautions...................................................................................................3
I. Indoor Units
Introduction..............................................................................................................8
Ceiling Cassette 4-way..........................................................................................10
Ceiling & Floor.......................................................................................................31
Ceiling concealed Duct..........................................................................................45
II. Outdoor Units
Introduction............................................................................................................67
MPS Inverter Single A(AUUW-B, AUUW-O/R410A)..............................................69
III. Troubleshooting Guide
Self-diagnosis Function.........................................................................................96
Cycle Troubleshooting Guide.................................................................................97
Electronic Parts Troubleshooting...........................................................................98
General Information.............................................................................................103
IV. Electronic Control Device
Ceiling Cassette Type..........................................................................................120
Ceiling Duct Type.................................................................................................121
Ceiling & Floor.....................................................................................................123
V. Schematic Diagram
Ceiling Cassette Type..........................................................................................126
Ceiling Duct Type.................................................................................................127
Ceiling & Floor.....................................................................................................128
V. Functional Description
Ceiling Cassette Type..........................................................................................130
Ceiling Duct Type.................................................................................................132
Ceiling & Floor.....................................................................................................135
Outdoor Units ......................................................................................................138
VII. Explode View and Replacement Parts List
Indoor Units.........................................................................................................151
Outdoor Units ......................................................................................................169
Panel Assembly, Front.........................................................................................179

Safety Precautions
Service Manual 3
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.
■Meanings of symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
■Installation
Be sure not to do.
Be sure to follow the instruction.
Do not use a defective or under-
rated circuit breaker. Use this
appliance on a dedicated circuit.
• There is risk of fire or electric
shock.
Always ground the product.
• There is risk of fire or electric
shock.
Install the panel and the cover
of control box securely.
• There is risk of fire or electric
shock.
Always install a dedicated cir-
cuit and breaker.
• Improper wiring or installation may
cause fire or electric shock
Use the correctly rated break-
er or fuse.
• There is risk of fire or electric
shock.
Do not modify or extend the
power cable.
• There is risk of fire or electric
shock.

Safety Precautions
4Universal System Air Conditioner
■Operational
Do not install, remove, or re-
install the unit by yourself
(customer).
• There is risk of fire, electric shock,
explosion, or injury.
Be cautious when unpacking
and installing the product.
• Sharp edges could cause injury.
Be especially careful of the case
edges and the fins on the con-
denser and evaporator.
For installation, always con-
tact the dealer or an
Authorized Service Center.
• There is risk of fire, electric shock,
explosion, or injury.
Do not install the product on a
defective installation stand.
• It may cause injury, accident, or
damage to the product.
Be sure the installation area
does not deteriorate with age.
• If the base collapses, the air condi-
tioner could fall with it, causing
property damage, product failure,
and personal injury.
Do not let the air conditioner
run for a long time when the
humidity is very high and a
door or a window is left open.
• Moisture may condense and wet or
damage furniture.
Do not touch(operate) the
product with wet hands.
• There is risk of fire or electrical
shock.
Do not place a heater or other
appliances near the power
cable.
• There is risk of fire or electric
shock.
Do not let electric parts of the
product get wet.
• There is risk of fire, failure of the
product, or electric shock.

Safety Precautions
Service Manual 5
■Installation
Do not open the inlet grill of the product during
operation. (Do not touch the electrostatic filter,
if the unit is so equipped.)
• There is risk of physical injury, electric shock, or prod-
uct failure.
Be cautious that water could not enter the
product.
• There is risk of fire, electric shock, or product damage.
Always check for gas (refrigerant) leakage after
installation or repair of product.
• Low refrigerant levels may cause failure of product.
Install the drain hose to ensure that water is
drained away properly.
• A bad connection may cause water leakage.
Do not store or use flammable gas or com-
bustibles near the product.
• There is risk of fire or failure of product.
If strange sounds, or small or smoke comes
from product. Turn the breaker off or discon-
nect the power supply cable.
• There is risk of electric shock or fire.
Gasolin

Safety Precautions
6Universal System Air Conditioner
Keep level even when installing the product.
• To avoid vibration or water leakage.
Use two or more people to lift and transport
the product.
• Avoid personal injury.
Use a soft cloth to clean. Do not use harsh
detergents, solvents, etc.
• There is risk of fire, electric shock, or damage to the
plastic parts of the product.
Do not touch the metal parts of the product
when removing the air filter. They are very
sharp!
• There is risk of personal injury.
Do not step on or put anyting on the product.
(outdoor units)
• There is risk of personal injury and failure of product.
Do not insert hands or other objects through
the air inlet or outlet while the product is oper-
ated.
• There are sharp and moving parts that could cause
personal injury.
90˚
Wax
Thinner
■Operational

I. Indoor Units
Introduction.......................................................................................................8
Ceiling Cassette 4-way...................................................................................10
Ceiling & Floor................................................................................................31
Ceiling Concealed Duct..................................................................................45
Service Manual 7

• Models List
Type Refrigerant Chassis
name 18,000 (5.3) 24,000 (7.0) 30,000 (8.8) 36,000 (10.6)
TE
TF
TD
Ceiling
&
Floor
R410A VB
BH
BG
12,000
(3.5)
BR
48,000
(14.1) 60,000 (17.6)
VE
1Ø, 220-240V,
50Hz
Model name
Nominal capacity [Btu/h(kW)] Power
Supply
R410A
Ceiling
Cassette
4-Way
Ceiling
Concealed
Duct
Indoor unit
R410A
ATNH126ELFB
[UT12 NEB] ATNH186ELFB
[UT18 NEB]
AVNH186BLAB
[UV18 NBB] AVNH246BLAB [UV24 NBB] AVNH306BLAB [UV30 NBB]
ABNH306GLAB
[UB30 NGB] ABNH366GLAB [UB36 NGB]
ATNH246FLFB
[UT24 NFB] ATNH306FLFB [UT30 NFB] ATNH366DLFB
[UT36 NDB] ATNH486DLFB [UT48 NDB] ATNH606DLFB
[UT60 NDB]
ABNH486RLAB
[UB48 NRB] ABNH606RLAB
[UB60 NRB]
--
--
-
-
--
-- -
-- -
-
AVNH126ELAB
[UV12 NEB] ---
-
---
---
-
--
--
---
ABNH186HLAB
[UB18 NHB] ABNH246HLAB [UB24 NHB]
----
--
8Universal System Air Conditioner
Introduction
Introduction

• Model Number Nomenclature
Indoorunit
Decoration panel(For Ceiling Cassette Models)
A T N H 1 8 6 E L FB
Serial Number
Functions
A :Basic B : Low Ambient
C : Plasma Filter E : Elevation Grille
F : Elevation Grille + Plasma Filter
H : Plasma Filter + Low Ambient
L : Nano Plasma M : Nano Plasma + Elevation Grille
Look
L : Basic
Chassis Name
Electrical Ratings
6:1Ø,220V~240V,50Hz 8:3Ø,380V~415V,50Hz
Nominal CoolingCapacity in Btu/h
Ex) 18 -> 18,000 Btu/h, 48 -> 48,000 Btu/h
Model Type
C : Cooling Only H : HeatPump
Indicates that this is a indoor unit for R410A
ATN : Ceiling cassette type indoor unit
ABN : Ceiling concealed duct type indoor unit
AVN : Convertible type indoor unit
P T - H EC
Functions
A : Basic C : Plasma Air Purifier
E : Elevation Grille F : Elevation Grille + Plasma Air Purifier
Indoor Unit Chassis
D : D Chassis E : E Chassis F : F Chassis
Model Type
C : Cooling Only H : Heat Pump
Decoration Panel of Ceiling Cassette Type Indoor Unit
Service Manual 9
Introduction

10 Universal System Air Conditioner
Ceiling Cassette 4-way
Contents
1. Features & Benefits ..............................................................................11
2. List of Functions....................................................................................15
3. Specifications........................................................................................16
4. Dimensional Drawings ..........................................................................18
5. Wiring Diagrams ...................................................................................21
6. Piping Diagrams....................................................................................22
7. Operating Instructions...........................................................................23
8. Installation.............................................................................................25
9. Accessories ..........................................................................................30
Ceiling Cassette 4-way
(R410A·Indoor Units)
ATNH-EL/FL/DL
Ceiling Cassette 4-way