DOWNLOAD LG LS-R126ABL / LS-R126ARL Service Manual ↓ Size: 6.89 MB | Pages: 127 in PDF or view online for FREE

-32-

1. Check that all tubing and wiring have been properly

connected.

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

fully open.

1. Remove the battery cover 

by pulling it according to the
arrow direction.

2. Insert new batteries making 

sure that the (+) and (–) of 
battery are installed correctly.

3. Reattach the cover by

pushing it back into position.

NOTE:
• Use 2 AAA(1.5volt) batteries. Do not use recharge-

able batteries.

• Remove the batteries from the remote control if the

system is not going to be used for a long time.

• 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 conveyed

to the hose, secure the unit with an anti-vibration
bushing.

Operate unit for 15~20 minutes, then check the system
refrigerant charge:
1. Measure the pressure of the gas side service valve.
2. Measure the temperature of the intake and discharge

of air.

3. Ensure the difference between the intake tempera-

ture and the discharge is more than 8°C(46°F) (Cool-
ing) or (Heating).

4. For reference; the gas side pressure of optimum con-

dition is as below.(Cooling)

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

system is most likely over-charged, and charge
should be removed. If the actual pressure are
lower than shown, the system is most likely
undercharged, and charge should be added.

The air conditioner is now ready for use.

Bolt

Tubing connection

Discharge 

temperature

Discharge air

Intake temperature

R-22

35°C (95°F)

4~5kg/cm

2

G(56.8~71.0 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.

This is performed when the unit is to be relocated
or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the
outdoor 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

cooling 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.

-21-

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

type A screws. If mounting the unit on a concrete
wall, use anchor bolts.
• Mount the installation plate horizontally by aligning

the centerline using a level.

• 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.

• Open the Front Grille.
• Pass Telephone Control Cord Wire through the hole

which the power cord goes through.

• Connect Telephone Control Cord Wire to the phone

jack of telephone PCB of Control Box.

• Fix Telephone Control Cord Wire inside Control box

so as not to disconnect.

• Close the Front Grille.

Installation Plate

Type "A" screw

5-7mm

(3/16"~5/16")

Indoor

WALL

Outdoor

Answering telephone / Normal telephone

(Not packed in the box)

Adaptor

(Not packed in 

the box)

Telephone Control

Cord Wire

(Packed in the box)

Phone
Conductor

Installation plate

Ø70mm

C

D

B

A

Ø70mm

Ø70mm

C

E

A

B

D

Installation plate

Installation plate

A

B

C

D

SJ

90

20

80

20

SL, SK

45

40

80

20

SQ

75

12

80

12

SR

0

40

20

40

ST

105

0

210

0

CHASSIS

(Grade)

Distance (mm)

A

B

C

D

E

SM

180

115

-

115

50

SN

180

115

195

115

-

CHASSIS

(Grade)

Distance (mm)

-22-

Main cause for refrigerant leakage is due to defect in
the flaring work. Carry out correct flaring work using the
following 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 

distance.

• 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-
ping burrs into the tubing.

• Remove flare nuts attached to indoor and outdoor

unit, then put them on pipe/tube having completed
burr removal.
(not possible to put them on after flaring work)

• 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.

5. Check
• Compare the flared work with figure below.
• If flare is noted to be defective, cut off the flared sec-

tion and re-flare it.

Copper

pipe

90

°

Slanted   Uneven  Rough

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Inclined

Inside is shiny without scratches

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Pipe

Reamer

Point down

Flare nut

Copper tube

mm

inch

mm

Ø6.35

1/4

0~0.5

Ø9.52

3.8

0~0.5

Ø12.7

1/2

0~0.5

Ø15.88

5/8

0~1.0

Ø19.05

3/4

1.0~1.3

Outside diameter

-23-

• 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.

• Do not connect the cable to the indoor unit.
• Make a small loop with the cable for easy 

connection later.

NOTE: If the drain hose is routed inside the room, 
insulate the hose with an insulation material* so that
dripping from "sweating"(condensation) will not damage
furniture or floors.
*Foamed polyethylene or equivalent is recommended.

• 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 instal-
lation plate.) Ensure that the hooks are properly seat-
ed on the installation plate by moving it left and right.

• Align the center of the pipes and sufficiently tighten

the flare nut by hand.

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.

Tubing holder

Connecting 
cable

Loop

Gas side
piping

Liquid side
piping

Drain hose

Drain hose

Connecting

cable

Indoor unit tubing

Flare nut

Pipes

Drain hose