DOWNLOAD LG LWG0760AHG_AHN_AHE Service Manual ↓ Size: 2.87 MB | Pages: 60 in PDF or view online for FREE

—11—

1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the 3 screws which fasten the

brace.(Refer to section 2.2.1)

3. Remove the 3 screws which fasten the condenser

and shroud.

4. After discharging the refrigerant completely,

unbraze the interconnecting tube at the condenser
connections.

5. Remove the condenser carefully.
6. Re-install the component by referring to notes.

(See Figure 15)

1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the 2 screws which fasten the evaporator.
3. Move the evaporator sideways carefully.

(Refer to section 2.2.1)

4. After discharging the refrigerant completely,

unbraze the interconnecting tube at the evaporator
connections.

5. Remove the evaporator carefully.
6. Re-install the component by referring to notes.

(See Figure 16)

1. Remove the cabinet. (Refer to section 2.1.2)
2. After discharging the refrigerant completely,

unbraze the interconnecting tube at the capillary
tube.(See caution above)

3. Remove the capillary tube.
4. Re-install the component by referring to notes.

Discharge the refrigerant system using a
Freon

TM

Recovery System.

If there is no valve to attach the recovery 
system, install one (such as a WATCO A-1)
before venting the Freon

TM

. Leave the valve in

place after servicing the system.

—12—

— Replacement of the refrigeration cycle.

1. When replacing the refrigeration cycle, be sure to

Discharge the refrigerant system using a Freon

TM

recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the Freon

TM

. Leave the valve in place after 

servicing the system.

2. After discharging the unit completely, remove the

desired component, and unbraze the pinch-off
tubes.

3. Solder service valves into the pinch-off tube ports,

leaving the valves open.

4. Solder the pinch-off tubes with Service valves.
5. Evacuate as follows.

1) Connect the vacuum pump, as illustrated figure

17A.

2) Start the vacuum pump, slowly open manifold 

valves A and B with two full turns
counterclockwise and leave the valves open.
The vacuum pump is now pulling through valves
A and B up to valve C by means of the manifold

and entire system.

3) Operate the vacuum pump for 20 to 30 minutes, 

until 600 microns of vaccum is obtained. Close 
valves A and B, and observe vacuum gauge for 
a few minutes. A rise in pressure would 
indicate a possible leak or moisture remaining in
the system. With valves A and B closed, stop 

the vacuum pump.

4) Remove the hose from the vacuum pump and

place it on the charging cylinder. See figure
17B.
Open valve C.
Discharge the line at the manifold connection.

5) The system is now ready for final charging.

6. Recharge as follows :

1) Refrigeration cycle systems are charged from

the High-side. If the total charge cannot be put 
in the High-side, the balance will be put in the 
suction line through the access valve which you 
installed as the system was opened.

2) Connect the charging cylinder as shown in figure 

17B.
With valve C open, discharge the hose at the
manifold connection.

3) Open valve A and allow the proper charge to 

enter the system. Valve B is still closed.

4) If more charge is required, the high-side will not 

take it. Close valve A.

5) With the unit running, open valve B and add the 

balance of the charge.
a. Do not add the liquid refrigerant to the Low-

side.

b. Watch the Low-side gauge; allow pressure to 

rise to 30 lbs.

c. Turn off valve B and allow pressure to drop.
d. Repeat steps b. and c. until the balance of the 

charge is in the system.

6) When satisfied the unit is operating correctly, 

use the pinch-off tool with the unit still running 
and clamp on to the pinch-off tube. Using a tube 
cutter, cut the pinch-off tube about 2 inches from 
the pinch-off tool. Use sil-fos solder and solder 
pinch-off tube closed. Turn off the unit, allow it to 
set for a while, and then test the leakage of the 
pinch-off connection.

If high vacuum equipment is used, just crack
valves A and B for a few minutes, then open
slowly with the two full turns counterclockwise.
This will keep oil from foaming and being
drawn into the vacuum pump.

—13—

Equipment needed: Vacuum pump, Charging cylinder,  Manifold gauge, Brazing equipment. Pin-off tool capable
of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve.

A

B

COMPOUND GAUGE

EVAPORATOR
(LOW PRESSURE SIDE)

SEE INSETS
BELOW

CONDENSER
(HIGH PRESSURE SIDE)

MANIFOLD

GAUGE

COMPRESSOR

CAPILLARY TUBE

A

B

EXTERNAL
VACUUM PUMP

A

CHARGING
CYLINDER

LOW

HI

B

C

—14—

1.To prevent vibration and noise, make sure the unit

is installed securely and firmly.

2.Install the unit where the sunlight does not shine

directly on the unit.

3.The outside of the cabinet must extend outward for

at least 11" and there should be no obstacles, such
as a fence or wall, within 20" from the back of the
cabinet because it will prevent heat radiation of the
condenser.
Restriction of outside air will greatly reduce the
cooling efficiency of the air conditioner.

4.Install the unit a little slanted so the back is slightly

lower than the front (about 

1

/

2

"). This will help force

condensed water to the outside.

5.Install the unit from the bottom about 30"~60"

above the floor level.

All side louvers of the cabinet must remain
exposed to the outside of the structure.

AWNING

COOLED AIR

HEAT

RADIATION

30"~60"

ABOUT 

1

/

2

"

Over 20"

FENCE

1. Before installing the room air conditioner, please

install the knob. (If it is not fixed on the unit.)

2. Remove the screws which fasten the cabinet at

both sides and at the back.

3. Slide the unit from the cabinet by gripping the base

pan handle and pulling forward while 
bracing the cabinet.

4. Slide the air conditioner into the case.

Reinstall the 2 screws removed earlier on each side
of the case.

CAUTION: The power cord must be connected to an independent

circuit. The green wire must be grounded.

Shipping

screws