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Model
LB-D1861HL_CL LB-D2461HL_CL LB-F3061HL LB-F3661HL_CL LB-F3681HL_CL LB-F4261HL LB-E4881HL_CL LB-E6081HL_CL
Pages
62
Size
1.69 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
lb-d1861hl-cl-lb-d2461hl-cl-lb-f3061hl-lb-f3661hl-.zip
Date

LG LB-D1861HL_CL / LB-D2461HL_CL / LB-F3061HL / LB-F3661HL_CL / LB-F3681HL_CL / LB-F4261HL / LB-E4881HL_CL / LB-E6081HL_CL Service Manual ▷ View online

–33–
CAUTION
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power specialized for the air conditioner. As for the method of wiring,
be guided by the circuit diagram pasted on the inside of control box cover.
2) Provide a circuit breaker switch between power source and the unit.
3) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from
vibrations to which the unit is subjected during the course of transportation. Check them and
make sure that they are all tightly fastened. (If they are loose, it could give rise to burn-out of the
wires.)
4) Specification of power source
5) Confirm that electrical capacity is sufficient.
6) Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage marked
on the name plate.
7) Confirm that the cable thickness is as specified in the power sources specification.
(Particularly note the relation between cable length and thickness.)
8) Never fail to equip a leakage breaker where it is wet or moist.
9) The following troubles would be caused by voltage drop-down.
• Vibration of a magnetic switch, damage on the contact point there of, fuse breaking, disturbance to the
normal function of a overload protection device.
• Proper starting power is not given to the compressor.
Teach the customer the operation and maintenance procedures, using the operation manual (air filter cleaning,
temperature control, etc.).
HAND OVER
2) Connection of power supply
1. Connect the power supply cord to the independent power supply.
• Circuit breaker is required.
2. Operate the unit for fifteen minutes or more.
3) Evaluation of the performance
1. Measure the temperature of the intake and discharge air.
2. Ensure the difference between the intake temperature and the discharge one is more than 8°C (Cooling) or
reversely (Heating).
–34–
Optional Operation
1) Two Thermistor System
(1) Open the rear cover of the wired remote-controller to set the mode.
(2) Select one of three selectable modes as follows.
• Position 1:
The room temperature is controlled by the thermistor of the main body.
• Position 2:
The room themperature is controlled by the thermistor of the wired remote-controller, control the   
temperature according to the position of wired remote-controller.
• Position 3:
The room temperature is controlled by lower temperature between the temperature of main body and of
remote-controller sensor. 
(3) Move the slide switch to set position.
(4) Close the rear cover and check if it works normally.
TH
R14H
SW TH
REMO
MAIN
2TH
OP7
R18H
R17H
OP6
LO
STAND
SW
HIGH
HI
R03S
C070
R04S
R02S
R01S
OP3
OP2
OP1
R19H
R11H
R13H
R12H
OP5R16H
OP4
R15H
CO1H
REMO
Room Temp. sensor
2TH
MAIN
Position 2
Position 1
Position 3
Slide switch for 2 Thermistor
• Select the position after counselling with a customer.
• In case of cooling mode, room temperature is controlled by the main body sensor.
• To control the room temperature by a wired remote controller, install controller(room temp. sensor) to sense
the temperature more accurately. 
• Maunfactured in the position 1.
CAUTION
–35–
2) Group Control(Optional Wiring)
• You can use a group control operation after connecting the brown and yellow wire of each  air-conditioner.
• Remove the resistor "OP 7" in remote controller.
• It operates maximum 16 Units by only one Wired Remote Controller,
and each Unit starts sequentially to prevent overcurrent.
Wiring design
Features
• Use Only One Wired Remote Controller with several air conditioners(max. 16 Units)
• Random starting to prevent overcurrent.
Operation unit
ZONE
1 2 3 4
Humidify
JET
AUTO
AUTO SWING
OPERATION
FAN SPEED
Program set
SUB FUNCTION
SET TEMP
Room Temp
HI
MED
LO
Heater
Defrost
Filter
Preheat
Out door
Time
Timer
On
Set no. Time
Off
01
03
05
07
09
11
13
15
17
19
21
23
Indoor Unit 1
Terminal(Local Supply)
Block
Terminal(Local Supply)
Block
Terminal(Local Supply)
Block
Main PCB
#1
Main PCB
#2
Main PCB
#16
Wired Remote Controller
Slide Switch
OP7
Remote
Controller
PCB
Indoor Unit 2
Main PCB
Indoor Unit 16
Connector
RED(12V)
YL(SIGNAL)
BR(GND)
RED(12V)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
Connecting Cable(Local Supply)
Connector
Connector
....
....
• Be careful not to exchange the color of wires.
• The maximum length of connecting wire should be below 200m(25
) on connecting each units.
• Use a wire more than 0.5mm
2
CAUTION
Cycle
1. Installation (Connecting the piping between indoor and outdoor unit)
–36–
• Installation
(1) Connect the piping between the indoor and
outdoor unit firmly.
–  Incorrect connection may cause the leakage and
incomplete vacuuming.
(2) Attach the charging hose (manifold gage) to the
service port.
–  Charging hose is necessary to check the pressure
and to inject R22 for leakage test.
–  The valve of charging hose must be closed before
being connected.
(3) Inject the 100~300g R22 through the charging hose
opening the valve.
(4) Check the joint part using a gas detector or soapy
water for leakage.
–  On checking, the service valve of main service port
must be closed, this test is only for checking whether
pipe connection is ok or not.
(5) If there is no leakage, discharge R22 in piping
completely into tank for retrieving.
–  Complete discharge is needed for vacuuming.
–  If leakage is found, please fasten the joint more
tightly.
(6) After closing the valve of charging hose,
disconnect the tank and connect the vacuum pump
to charging hose and open the valve again for
vacuuming.
(7) Turn on the vacuum pump until the pressure drops
below 0kg/cm
2
.
(8) After vacuuming, disconnect the vacuum pump and
open the spindle of service port (liquid-side)
slightly for 30 sec and then open the spindle of
(gas side) with hexagonal wrench.
(9) Open the liquid side completely first and then the
gas side fully in order.
Lo
Purge the air
Outdoor unit
Indoor unit
Liquid side
Gas side
Gas cylinder
R22
Page of 62
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