DOWNLOAD LG LS-J0762Y / S07LHN Service Manual ↓ Size: 6.28 MB | Pages: 101 in PDF or view online for FREE

-37-

1. Check that all tubing and wiring have been properly

connected.

2. Check that the gas and liquid side service valves are

fully open.

Remove the battery cover 
by pulling it according to the

arrow direction.

Insert new batteries making 
sure that the (+) and (–) of 
battery are installed correctly.

Reattach the cover by

pushing it back into position.

Anchor the outdoor unit with a bolt and nut(ø10mm)
tightly and horizontally on a concrete or rigid mount.
When installing on the wall, roof or rooftop, anchor
the mounting base securely with a nail or wire
assuming the influence of wind and earthquake.
In the case when the vibration of the unit is con-
veyed to the hose, secure the unit with an anti-
vibration rubber.

Operate unit for 15~20 minutes, then check the system
refrigerant charge:

NOTE: If the actual pressure are higher than shown, the

system is most likely over-charged, and charge
should be removed. If the actual pressure are low-
er than shown, the system is most likely under-
charged, and charge should be added. 
The air conditioner is now ready for use.

Bolt

Tubing connection

This is performed when the unit is to be relocated
or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the out-
door unit without loss in refrigerant gas.

CAUTION:
Be sure to perform Pump Down procedure with the
unit cooling mode.

Pump Down Procedure
1. Connect a low-pressure gauge manifold hose to the

charge port on the gas side service valve.

2. Open the gas side service valve halfway and purge the

air from the manifold hose using the refrigerant gas.

3. Close the liquid side service valve(all the way in).
4. Turn on the unit's operating switch and start the cool-

ing operation.

5. When the low-pressure gauge reading becomes 1 to

0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close the gas
side valve stem and then quickly turn off the unit. At
that time, Pump Down has been completed and all
refrigerant gas will have been collected in the outdoor
unit.

Discharge 
temperature

Discharge air

Intake temperature

R-22

35°C (95°F)

4.5~5.5kg/cm

2

G(63.9~78.1 P.S.I.G.)

R-410A

35°C (95°F)

8.5~9.5kg/cm

2

G(120~135 P.S.I.G.)

Outside ambient

TEMP.

Refrigerant

The pressure of the gas side 

service valve.

-26-

The wall you select should be strong and solid enough to
prevent vibration

■

Mount the installation plate horizontally by aligning
the centerline using a level.

Installation Plate

Type "A" screw

Installation plate

Ø70mm

C

D

B

A

Ø70mm

A

B

C

D

7k, 9k

50

20

80

20

12k, 18k

45

40

80

20

CHASSIS

(Grade)

Distance (mm)

■

Drill the piping hole with a ø70mm hole core drill.
Drill the piping hole at either the right or the left with
the hole slightly slanted to the outdoor side.

5-7mm

(3/16"~5/16")

Indoor

WALL

Outdoor

-27-

Main cause for gas leakage is due to defect in flaring
Main cause for refrigerant leakage is due to defect in the
flaring work. Carry out correct flaring work using the fol-
lowing procedure.

■

Use the piping kit accessory or pipes purchased
locally.

■

Measure the distance between the indoor and the
outdoor unit.

■

Cut the pipes a little longer than the measured dis-
tance.

■

Cut the cable 1.5m longer than the pipe length.

■

Completely remove all burrs from the cut cross sec-
tion of pipe/tube.

■

Put the end of the copper tube/pipe in a downward
direction as you remove burrs in order to avoid drop-

■

Remove flare nuts attached to indoor and outdoor
unit, then put them on pipe/tube having completed
burr removal.

■

Firmly hold copper pipe in a die in the dimension
shown in the table above.

■

Carry out flaring work using flaring tool as shown
below.

Flare nut

Copper tube

Copper

pipe

90

°

Slanted   Uneven  Rough

Pipe

Reamer

Point down

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

mm

inch

mm

Ø6.35

1/4

0~0.5

Ø9.52

3/8

0~0.5

Ø12.7

1/2

0~0.5

Outside diameter

A

■

Compare the flared work with figure below.

■

If flare is noted to be defective, cut off the flared sec-
tion and re-flare it.

Inclined

Inside is shiny without scratches

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

-28-

■

Preparing the indoor unit's piping and drain hose for
installation through the wall.

■

Remove the plastic tubing retainer(see illustration
below) and pull the tubing and drain hose away from
chassis.

■

Replace the plastic tubing holder in the original posi-
tion.(Optional)

■

Do not connect the cable to the indoor unit.

■

Make a small loop with the cable for easy connec-
tion later.

■

Hook the indoor unit onto the upper portion of the
installation plate.(Engage the two hooks of the rear
top of the indoor unit with the upper edge of the
installation plate.) Ensure that the hooks are proper-
ly seated on the installation plate by moving it left
and right.

■

Align the center of the pipes and sufficiently tighten
the flare nut by hand.

NOTE: If the drain hose is routed inside the room, insu-

late the hose with an insulation material* so that
dripping from "sweating"(condensation) will not
damage furniture or floors.
*Foamed polyethylene or equivalent is recom-

mended.

Tubing holder

Drain hose

Connecting 
cable

Loop

Gas side
piping

Liquid side
piping

Drain hose

1

2

Drain hose

Connecting

cable

Indoor unit tubing

Flare nut

Pipes

When install, make sure that the
remaining parts must be removed
clearly so as not to damage the
piping and drain hose, especially
power cord and connecting cable.