DOWNLOAD LG LB-F4280HL / LB-F4280CL Service Manual ↓ Size: 916.15 KB | Pages: 42 in PDF or view online for FREE

Model
LB-F4280HL LB-F4280CL
Pages
42
Size
916.15 KB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
lb-f4280hl-lb-f4280cl.zip
Date

LG LB-F4280HL / LB-F4280CL Service Manual ▷ View online

Installation of Unit
Install the unit above the ceiling correctly.
• Apply a joint-canvas between the unit and duct to
absorb unnecessary vibration.
• Apply a filter Accessory at air return hole.
• Install the unit leaning to a drainage hole side as
a figure for easy water drainage.
• A place where the unit will be leveled and that
can support the weight of the unit.
• A place where the unit can withstand its vibration.
• A place where service can be easily performed.
–16–
Drainage hole
M10 Nut
M10 SP. washer 
M10 washer 
X 4
X 4
(Local
supply)
X 4
M10 Nut
M10 SP. washer 
M10 washer 
X 4
X 4
(Local
supply)
X 4
A
B
C
1-3mm
D
(G)
H
I
E
F
CASE 1
POSITION OF SUSPENSION BOLT
CASE 2
POSITION OF CONSOLE BOLT
A
B
C
D
E
F
(G) H
I
42K BTU
1242 1180 492 54
600
30
87 830 186
(Unit:mm)
Dimension
Capacity
2. Ceiling dimensions and hanging bolt location
3. The Indoor Unit Installation
• Select and mark the position for fixing bolts.
• Drill the hole for set anchor on the face of ceiling.
• Insert the set anchor and washer onto the sus-
pension bolts for locking the suspension bolts on
the ceiling.
• Mount the suspension bolts to the set anchor
firmly.
• Secure the installation plates onto the suspen-
sion bolts (adjust level roughly) using nuts, wash-
ers and spring washers.
–17–
1 Set anchor
Old building
New building
2 Plate washer
3 Spring washer
4 Nut
5 Suspension
   bolts
Tighten the nut and bolt to prevent unit falling.
CAUTION
• Local supply
➀ 
Set anchor
Plate washer 
- M10
Spring washer
- M10
Nut 
- W3/8 or M10
Suspension bolt
- W3/8 or M10
–18–
• Fix the under plate on the wall
• Separate the under plate from Remote control box.
• Fix the cord clamps on the wall by
Ø 3 tapping screws (accessory).
• Fix the remote control cord.
Remote control 
box body
Cord clamp
(accessory)
Lever carefully 
the box open 
using a screw 
driver, etc.
Front case
The lower part
Face of wall
Under plate
Screw (accessory)
4. Remote Controller Installation
• Although the room temperature sensor is in the indoor unit, the remote control box should be
installed in such places away from direct sunlight and high humidity.
Installation of the remote control box
• Select places that are not splashed with water.
• Select control position after receiving customer approval.
• The room temperature sensor of the thermostat for temperature control is built in the indoor unit.
• This remote controller equipped with liquid crystal display. If this position is higher or lower, display is difficult
to see.(The standard height is 1.2 ~ 1.5m high)
Routing of the remote control cord
• Keep the remote control cord away from the refrigerant piping and the drain piping.
• To protect the remote control cord from electrical noise, place the cord at least 5cm away from other power
cables (audio equipment, television set, etc.)
• If the remote control cord is secured to a wall, provide a trap at the top of the cord to prevent water droplets
from running.
REMOTE CONTROL BOX INSTALLATION
DISASSEMBLING
ELECTRICAL WIRING
 
Wire and make sure that teminal
numbers are matched on unit side and
remote controller side.
The maximum length of the cord is 100m.
If the length of the cord exceeds 50m,
use a wire size greater than 0.5mm
2
.
Remote controller
 Yellow, Red, Brown  
(Main board)
CN REMO
1) Connecting cables to the Indoor Unit 
Connect the wires to the terminals on the control board individually according to the outdoor unit connection.
• Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of indoor unit
respectively.
42K BTU
• Cooling and Heating Type
• Cooling only Type
2) Clamping of cables
1) Arrange 2 power cables on the control panel.
2) First, fasten the steel clamp with a screw to the inner boss of control panel.
3) For the cooling model, fix the other side of the clamp with a screw strongly.
For the heat pump model, put the 0.75mm
2
cable(thinner cable) on the clamp and tighten it with a plastic
clamp to the other boss of the control panel.
4) In Australia, the length of power supply cord measured from the entry of the power supply cord to the middle
of live pin on the power plug should be over 1.8m.
The power cord connected to the outdoor unit should be
complied with the following specifications (Rubber
insulation, type H05RN-F approved by HAR or SAA).
The connecting cable connected to the indoor and outdoor
unit should be complied with the following specifications
(Rubber insulation, type H05RN-F approved by HAR or SAA).
CAUTION
20mm
GN/YL
NORMAL
CROSS-SECTIONAL
AREA 2.5mm
2
NORMAL
CROSS-SECTIONAL
AREA 0.75mm
2
20mm
GN/YL
–19–
MAIN POWER INPUT
Terminals on the indoor unit
1
2
4
5
3
Terminals on the outdoor unit
1
2
4
5
3
Terminals on the indoor unit
1
2
4
5
3
Terminals on the outdoor unit
1
2
4
5
3
R
S
N
T
5. Connecting Cables between Indoor Unit and Outdoor Unit
If the supply cord is damaged, it must be replaced by a special cord or assembly availible from the 
manufacturer of its service agent.
Make sure that the screws of the terminal are free from looseness.
WARNING
Page of 42
Display

Click on the first or last page to see other LB-F4280HL / LB-F4280CL service manuals if exist.