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Model
LWG0760ACG LWG0760ACG LWG0760BCG LWG0960ACG LWG0960BCG
Pages
29
Size
912.23 KB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
lwg0760acg-lwg0760acg-lwg0760bcg-lwg0960acg-lwg096.zip
Date

LG LWG0760ACG / LWG0760ACG / LWG0760BCG / LWG0960ACG / LWG0960BCG Service Manual ▷ View online

—11—
2.3.4 POWER CORD
1. Remove the control box. (Refer to section 2.1.3)
2. Open the control box. (Refer to section 2.3.3)
3. Disconnect the grounding screw from the control
box.
4. Disconnect the 2 receptacles.
5. Remove a screw which fastens the clip cord. 
(See Figure 10)
6. Remove the power cord. 
7. Re-install the component by referring to the above
removal procedure, above.
(Use only one ground-marked hole      for ground
connection.)
8. If the supply cord of this appliance is damaged, it
must be replaced by the special cord. (The 
special cord means the cord which has the same
specification marked on the supply cord attached at
the unit.)
2.3.5 THERMOSTAT
1. Remove the control box. (Refer to section 2.1.3)
2. Open the control box. (Refer to section 2.3.3)
3. Remove the 2 screws which fasten the thermostat.
4. Disconnect 2 leads of thermostat terminals.
5. Remove the thermostat.
6. Re-install the components by refereing to the  above
removal procedure. (See Figure 11)
2.3.6 ROTARY SWITCH
1. Remove the control box. (Refer to section 2.1.3)
2. Open the control box. (Refer to section 2.3.3)
3. Remove the 2 screws which fasten the rotary switch.
4. Disconnect all the leads of the rotary switch terminals.
5. Remove the rotary switch.
6. Re-install the components by referring to the  above
removal procedure. (See Figure 12)
2.3.7 MOTOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the evaporator. (Refer to section 2.2.1)
3. Remove the orifice. (Refer to section 2.2.1)
4. Remove the blower. (Refer to section 2.2.1)
5. Remove the fan. (Refer to section 2.2.2)
6. Remove the control box cover and housing of the
motor in the control box. (Refer to section 2.1.3)
7. Remove the 2 screws which fasten the motor from
the mount motor. (See Figure 13)
8. Remove the motor.
9. Re-install the components by referring to the
removal procedure, above.(See Figure 13)
Figure 12
Figure 11
Figure 10
Figure 13
—12—
2.4 REFRIGERATING CYCLE
2.4.1 CONDENSER
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 14)
2.4.2 EVAPORATOR
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 15)
2.4.3 CAPILLARY TUBE
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.
Figure 14
Figure 15
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.
CAUTION
—13—
— 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
16A.
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
16B.
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 
16B.
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.
NOTES
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.
CAUTION
—14—
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
COMPOUND GAUGE
EVAPORATOR
(LOW PRESSURE SIDE)
COMPRESSOR
CAPILLARY TUBE
CONDENSER
(HIGH PRESSURE SIDE)
SEE INSETS
BELOW
MANIFOLD
GAUGE
B
Figure 16A-Pulling Vacuum
Figure 16B-Charging
A
B
EXTERNAL
VACUUM PUMP
A
CHARGING
CYLINDER
LOW
HI
B
C
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