DOWNLOAD LG LWM1560BHE / LWM1861BHE / LWM1861BHG / LWN1862BHG / LWN2262BHG Service Manual ↓ Size: 2.32 MB | Pages: 67 in PDF or view online for FREE

—13—

1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the brace and the shroud cover.

(Refer to section 2.2.1)

3. Remove 6 screws which fasten the condenser.
4. After discharging the refrigerant completely,

unbraze the interconnecting tube at the condenser
connections.

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

(See figure 17)

1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the top cover and the brace. 

(Refer to section 2.2.1)

3. Discharge the refrigerant completely.
4. Remove the 3 screws which fasten the evaporator

at the left side and the top side.

5. Move the evaporator sideward carefully and then

unbraze the interconnecting tube at the evaporator
connectors.

6. Remove the evaporator.
7. Re-install the components by referring to notes.

(See figure 18)

1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the brace. (Refer to section 2.2.1)
3. After discharging the refrigerant completely,

unbraze the interconnecting tube at the capillary
tube.

4. Remove the capillary tube.
5. Re-install the components by referring to notes.

Discharge the refrigerant system using 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.

—14—

— 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 unbrace 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

19A.

2) Start the vacuum pump, slowly open manifold 

valves A and B with two full turns
counterclockwise and leave the valves closed.
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 vacuum 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
19B.
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 

19B.
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.

—15—

Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pinch-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

—16—

675 (770)

660

428 

CAPILLARY  TUBE

COMPRESSOR

BLOWER

EVAPORATOR  COIL

CONDENSER  COIL

FAN

MOTOR

:  COOLING CYCLE
:  HEATING CYCLE

Following is a brief description of the important components and their functions in the refrigeration system.
Refer to figure 20 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle.

MOTOR

COMPRESSOR

OIL

(LIQUID REFRIGERANT)

CAPILLARY TUBE 

OUTSIDE COOLING
AIR FOR REFRIGERANT
PASS THROUGH

SUCTION LIME
COOL LOW PRESSURE VAPOR

COOLED
AIR

COMPLETE LIQUID
BOIL OFF POINT

LIQUID
PRESSURE
DROP

ROOM AIR HEAT LOAD

VAPOR INLET

HOT
DISCHARGED
AIR

LIQUID OUTLET

HIGH PRESSURE VAPOR

LIQUID PEFRIGERANT

LOW PRESSURE VAPOR

ROOM AIR CONDITIONER

EVAPORATOR COILS

CONDENSER COILS

CYCLE OF REFRIGERATION