Samsung AS18WJWB, AS18WJWD, AS18WJWE, AST18WJWB, AST18WJWE Service Manual

ROOM AIR CONDITIONER

INDOOR UNIT

AS18WJWB
AS18WJWD
AS18WJWE
AST18WJWB
AST18WJWE
AS24W6WB
AS24W6WE
AST24W6WB
AST24W6WE
SC18ZWJ
SC24ZW6

SERVICE

OUTDOOR UNIT

US18WJWB
US18WJWD
US18WJWE
UST18WJWB
UST18WJWE
US24W6WB
US24W6WE
UST24W6WB
UST24W6WE
SC18ZWJX
SC24ZW6X

Manual

CONTENTSAIR CONDITIONER

1. Product Specifications

2. Operating Instructions & Installation

3. Disassembly and Reassembly

4. Refrigerating Cycle Diagram

5. Set Up the Model Option

6. Troubleshooting

7. Exploded Views and Parts List

8. Block Diagram

9. Wiring Diagram

1. Product Specifications

1-1 Table

Item

Type

Cooling

BTU/h

Dehumidifying \/h

Air Volume Cooling m3/min

Perfor­mance

Noise Cooling dB

Energy Efficiency

BTU/Wh

BTU/Wh

Power ø-V-Hz

Power Consumption kW

Operating Current A

Power

Power Factor Cooling %

Starting Current A

Length m

Power Cord Number of Core Wire

Capacity A

Outer Dimension

Width x Height
x Depth

Weight kg

Refrigerant Pipe

Liquid mm x L(m)

Gas mm x L(m)

Drain Hose D x L(mm)

Size

Compressor

Type

Motor

Type

Rated Output

Oil Type

Type

Blower

Motor

Type

Rated Output W

Heat Exchanger

Refrigerant Control unit

Freezer Oil Capacity cc

Refrigerant to Change(R22) g

Protection Device(OLP)

Cooling Test Condition

Maximum Operation Condition

Model

kcal/h

mm

inch

AS18WJWB

AST18WJWB

AS24W6WB

AST24W6WB

Indoor unit Outdoor unit Indoor unit Outdoor unit

Wall-mounted Wall-mounted

(1)

(2)

4,000 5,050

18,000 24,000

1.9 2.7

13.5 25 14.4 45

45/43/41 58/58 46/44/42 61/61

(1)

(2)

7.05 7.03

9.47 9.60

1-220-60 1-220-60

2.25

1.9

10.1

8.8

(1)

(2)

(1)

(2)

2.85

2.5

13.2

11. 5

(1)

(2)

(1)

(2)

98.0 98.0

47 65

--

--

--

1,065 x 298 x 218 790 x 548 x 285 1,065 x 298 x 218 880 x 638 x 310

41.9 x 11.7 x 8.6 31.1 x 21.6 x 11.2 41.9 x 11.7 x 8.6 34.6 x 25.1 x 12.2

13 39 13 64

ø6.35 x 5 ø6.35 x 5

ø12.7 x 5 ø15.88 x 5

ø18 x 2,000 ø18 x 2,000

Rotary Rotary

Induction Motor(PSC) Induction Motor(PSC)

1,950 2,670

SUNISO-4GSD SUNISO-4GSD

Cross flow Propeller Cross flow Propeller

steel steel steel steel

15 50 15 50

2R0W 16STEP 2ROW 24STEP 2R0W 16STEP 2ROW 28STEP

CAPILLARY TUBE CAPILLARY TUBE

600 800

1,200 1,400

MRA12068-12007 Internal

(1)

INDOOR UNIT : DB29˚C WB19˚C OUTDOOR UNIT : DB46˚C WB24˚C

(2)

INDOOR UNIT : DB27˚C WB19˚C OUTDOOR UNIT : DB35˚C WB24˚C

(2)

INDOOR UNIT : DB32˚C WB23˚C OUTDOOR UNIT : DB54˚C WB24˚C

1Samsung Electronics

Table( cont.)

Item

Type

Cooling

Dehumidifying \/h

Air Volume Cooling m

Perfor-

mance

Noise Cooling dB

Energy Efficiency Cooling

Power ø-V-Hz

Power Consumption Cooling kW

Operating Current Cooling A

Power Factor Cooling %

Power

Starting Current A

Length m

Power Cord Number of Core Wire

Capacity A

Outer Dimension

Weight kg

Refrigerant Pipe

Drain Hose D x L(mm)

Size

Compressor

Oil Type

Blower

Heat Exchanger

Refrigerant Control unit

Freezer Oil Capacity cc

Refrigerant to Change(R22) g

Protection Device(OLP)

Cooling Test Condition

Maximum Operation Condition

Type

Motor

Type

Motor

Width x Height

x Depth

Liquid mm x L(m)

Gas mm x L(m)

Type

Rated Output

Type

Rated Output W

BTU/Wh

Model

kW

BTU/h

3

/min

W/W

mm

inch

AS18WJWD

Indoor unit Outdoor unit

Wall-mounted

5.1

18,000

1.9

13.5 25

45/43/41 58/58

2.76

9.73

1-200/220-50

1.85

8.8

94

42

-

-

-

1,065 x 298 x 218 790 x 548 x 285

41.9 x 11.7 x 8.6 31.1 x 21.6 x 11.2

13 39

ø6.35 x 5

ø12.7 x 5

ø18 x 2,000

Rotary

Induction Motor(PSC)

1,895

SUNISO-4GSD

Cross flow Propeller

steel steel

15 50

2R0W 16STEP 2ROW 24STEP

CAPILLARY TUBE

600

1,200

Internal

NDOOR UNIT : DB27˚C WB19˚C OUTDOOR UNIT : DB35˚C WB24˚C

NDOOR UNIT : DB32˚C WB23˚C OUTDOOR UNIT : DB54˚C WB24˚C

Samsung Electronics2

Table( cont.)

Item

Type

Cooling

Dehumidifying \/h

Air Volume Cooling m

Perfor­mance

Noise Cooling dB

Energy Efficiency Cooling

Power ø-V-Hz

Power Consumption Cooling kW

Operating Current Cooling A

Power Factor Cooling %

Starting Current A

Power

Power Cord

Outer Dimension

Weight kg

Refrigerant Pipe

Drain Hose D x L(mm)

Type

Compressor

Size

Oil Type

Blower

Heat Exchanger

Refrigerant Control unit

Freezer Oil Capacity cc

Refrigerant to Change(R22) g

Protection Device(OLP)

Cooling Test Condition

Maximum Operation Condition

Motor

Type

Motor

Length m

Number of Core Wire

Capacity A

Width x Height

x Depth

Liquid mm x L(m)

Gas mm x L(m)

Type

Rated Output

Type

Rated Output W

BTU/Wh

Model

kW

BTU/h

3

/min

W/W

mm

inch

AS18WJWE

AST18WJWE

SC18ZWJ

Indoor unit Outdoor unit Indoor unit Outdoor unit

Wall-mounted Wall-mounted

5.1 6.8

18,000 24,000

1.9 2.7

13.5 25 14.4 45

45/43/41 58/58 46/44/42 61/61

2.62 2.72

9.23 9.60

1-220/240-50 1-220/240-50

1.95 2.5

9.5 12

97 91.4

40 82

--

--

--

1,065 x 298 x 218 790 x 548 x 285 1,065 x 298 x 218 880 x 638 x 310

41.9 x 11.7 x 8.6 31.1 x 21.6 x 11.2 41.9 x 11.7 x 8.6 34.6 x 25.1 x 12.2

13 39 13 64

ø6.35 x 5 ø6.35 x 5

ø12.7 x 5 ø15.88 x 5

ø18 x 2,000 ø18 x 2,000

Rotary Rotary

Induction Motor(PSC) Induction Motor(PSC)

2,120 2,740

SUNISO-4GSD SUNISO-4GSD

Cross flow Propeller Cross flow Propeller

steel steel steel steel

15 50 15 50

2R0W 16STEP 2ROW 24STEP 2R0W 16STEP 2ROW 28STEP

CAPILLARY TUBE CAPILLARY TUBE

600 900

1,100 1,450

Internal Internal

NDOOR UNIT : DB27˚C WB19˚C OUTDOOR UNIT : DB35˚C WB24˚C

NDOOR UNIT : DB32˚C WB23˚C OUTDOOR UNIT : DB54˚C WB24˚C

AS24W6WE

AST24W6WE

SC24ZW6

3Samsung Electronics

1-2 Pressure Graph

DB32.4 / WB24.0
DB30.6 / WB22.5
DB27.0 / WB19.0
DB24.0 / WB17.0
DB21.0 / WB15.0

Indoor Temp.( C)

Low pressure(kg/cm G)

10

8

6

4

2

0

25.0 35.0 45.0 55.0

Low Pressure Distribution(Cooling mode)

Outdoor Temp.(DB C)

DB32.4 / WB24.0
DB30.6 / WB22.5
DB27.0 / WB19.0
DB24.0 / WB17.0
DB21.0 / WB15.0

Indoor Temp.( C)

Low pressure(kg/cm G)

10

8

6

4

2

0

25.0 35.0 45.0 55.0

Low Pressure Distribution(Cooling mode)

Outdoor Temp.(DB C)

■ 18K BTU

■ 24K BTU

Samsung Electronics4

2. Operating Instructions & Installation

2-1 The Feature of Key in remote control

FUNCTIONBUTTONNo

1

(UP)

On/Off button.
Press the button to stop or run the air conditioner.

Temperature adjustment button(UP).
To increase the temperature by the pressing the temperature button.

2

(DOWN)

3

4

Temperature adjustment button(DOWN).
To decrease the temperature by the pressing the temperature button.

Mode selection button.
Each time you press this button,
Mode is changed in the following order.

Fan speed adjustment button.
Each time you press this button, FAN SPEED is changed in the following order.

Automatic(rotated : )

Low

Medium

High

Turbo(Maximum)

: Auto Mode : Dry Mode

: Cool Mode : Fan Mode

5

6

7

8

9

Flap button.
It adjusts the airflow to upward and downward.

Turbo button.
The air conditioner cools or heats the room as quickly as possible.
After 30minutes, the air conditioner is reset automatically to the previous mode.

Energy saving button.
If you wish to save energy when using your air conditioner, select the Energy saving
mode with the button.

Sleep button.
The sleep timer can be used when you are cooling or heating your room to switch the air conditioner
off automatically after a period of 6 hours.

On Timer button.
The On Timer enables you to switch on the air conditioner automatically after
a given period of time that is from 1 hour to 24 hours.
To set the operating time, press the button one or more times until the required
time display.

5Samsung Electronics

Operating Instructions & Installation

10

11

12

FUNCTIONBUTTONNo

Off Timer button.
The Off Timer enables you to switch off the air conditioner automatically after
a given period of time that is from 1 hour to 24 hours.
To set the operating time, press the button one or more times until the required
time display.

Timer Set/Cancel button.
After setting On Timer or Off Timer, press the button to set it completely.
And press the button again to cancel On Timer or Off Timer set.

Battery life indicator.
If you want to check the battery life, press the button.
The longer will remain the battery life.
If one battery life indicator remains, replace new batteries.

Samsung Electronics6

2-2 Details for Operation Property

1. AUTO MODE : In this mode, operation COOL mode is
selected automatically by the difference between the
setting and room temperature.

Operation Type Room Temp.

Cool Operation

Ts : Setting temperature.

2. COOL MODE : The unit operates according to the
difference between the setting and room temperature.
(16°C~30°C)

3. DRY MODE : Has 4 states, each determined by room
temperature.
The unit operates in DRY mode.
*Compressor ON/OFF time is controlled compulsorily

(can not set up the fan speed, always breeze).

*Protective function : Low temperature release.

(Prevention against freeze)

4. TURBO MODE : This mode is available in AUTO, COOL,
DRY, FAN MODE.
When this button is pressed at first, the air conditioner is
operated "powerful" state for 30 minutes regardless of the
setting temperature, room temperature.
When this button is pressed again, or when the operating
time is 30 minutes, turbo operation mode is canceled and
returned to the previous mode.
*But, if you press the TURBO button in DRY or FAN

mode that is changed with AUTO mode automatically.

Tr ≥ Ts+1.0°C Compressor ON

Tr ≤ Ts Compressor OFF

6. FAN SPEED : Fan speed automatically varies depending
on both the difference between setting and the room tem­perature.
Can set up the fan speed in COOL,FAN mode.

7. COMPULSORY OPERATION :
For operating the air conditioner without the remote
control.
*The operating is the same function that AUTO MODE in

the remote control.

8. FLAP : BLADE-H is rotated vertically by the stepping
motor.
*Flap Set : Press the button under the remote control

is displayed on LCD the and the blades move up and
down. If the one more time press the button, blades
location is stop.

9. SETTING THE ON/OFF TIMER. :
*ON TIMER : The On Timer enables you to switch on the

air conditioner automatically after a given period of time.
You can set the period of time from 1 hour to 24 hours.

*OFF TIMER : The Off Timer enables you to switch off

the air conditioner automatically after a given period of
time. You can set the period of time from 1 hour to 24
hours.

10. BUZZER SOUND : Whenever the On/Off button is
pressed or whenever change occurs to the condition
which is set up or select, the compulsory operation mode,
buzzer is sounded "beep".

5. SLEEP MODE : Sleep mode is available only in COOL
mode.
The operation will stop after 6 hours.
*In COOL mode : The setting temperature is automatical-

ly raised by 1°C each 1hour When the temperature has
been raised by total of 2°C, that temperature is
maintained.

7Samsung Electronics

2-3 Installation

D

A

2-3-1 Before Installation

Keep the air conditioner drain hose outlet and inlet free from its surroundings.
In case of breakdown, keep the symmetry and fix it to prevent vibration.
The pipe length shall meet the standard as far as possible.

2-3-2 Installation Procedure

■ Location

Install the product in an area to guarantee the best cooling effect, convenience of piping and electric work, and inexistence of
vibration or wind in the vicinity.

■ Wall Drilling

Drill the wall downward in a diameter of 60 to 65mm.

■ Fixing Indoor Unit & Outdoor Unit

Fix the air conditioner hard enough so that it can not fall to the ground. On the roadside, the outdoor unit shall be installed 2m
above ground and kept away from pedestrians to prevent direct exposure to hot wind.

■ Pipe Spooling & Connecting

You shall cut the pipe straightly with a pipe cutter and grind all the burrs of the cut surface.
Pipe expansion may continue until the pipe surface becomes uneven or torn apart.
Be sure to use a torque wrench to tighten pipes or flare nuts.

<Torque & Depth>

Outer Diameter(D)

6.35mm(1/4")

12.70mm(1/2")

15.88mm(5/8")

Torque

140~170

380~420

440~480

(kgf.cm)

Depth

1.3mm

2.0mm

2.2mm

(A)

■ Leak Test

Put an inert gas like nitrogen in the outdoor unit pipe and put soap bubbles or other test liquids on the pipe surface for the leak test.

■ Drain Hose Connecting

Install the drain hose downward to drain water naturally. Be sure to pour water into the hose to check if it drains well.

■ Electric & Earth Work

Electric and earth work shall meet the "Electric Facility Technology Standard" and the "Internal Wire Regulation" of the Electric
Business Laws.

■ Inspection & Trial Run

Upon completion of the tests, you shall make a trial run while you explain the main functions of the air conditioner to finish the
installation.

Samsung Electronics8

2-4 Installation Diagram of Indoor Unit and Outdoor Unit

2-4-1 Air-Purge Procedure

1) Connect each assembly pipe to the appropriate
valve on the outdoor unit and tighten the flare nut.

2) Connect the charging hose of low pressure side
of manifold gauge to the packed valve having a
service port (3/8" Packed valve) as shown at the
figure.

3) Open the valve of the low pressure side of
manifold gauge counter-clockwise.

4) Purge the air from the system using vacuum
pump for about 30 minutes.

- After that, please recheck that pressure is

stabilization.

- Close the valve of the low pressure side of

manifold gauge clockwise.

- Remove the hose of the low pressure side

of manifold gauge.

Outdoor unit

Indoor unit

A

B

Gas pipe side

Liquid pipe side

C

D

5) Set valve cork of both liquid side and gas side of
packed valve to the open position.

6) Mount the valve stem nuts to the 2-Way and
3-Way valve. And mount the service port cap to
3-Way valve.

7) Check for gas leakage.

- At this time, especially check for gas

leakage from the 3-Way valve’s stem nuts,
and from the service port cap.

A

(gas)

B

(liquid)

Valve stem

Vacuum Pump

Stem cap

9Samsung Electronics

Operating Instructions & Installation

R22

2-4-2 Refrigerant Refill(R22)

Refill an air conditioner with refrigerant when refrigerant has been leaked at installing or using.

1) Purge air(for new installation only).

2) Turn the 3-Way valve clockwise to close,

connect the pressure gauge (low pressure side)
to the service valve, and open the 3-Way valve
again.

3) Connect the tank to refill with refrigerant.

4) Set the unit to cool operation mode.

5) Check the pressure indicated by the pressure

gauge(low pressure side).

* Standard pressure is should be 4.5~5.5kg/cm

in a regular, high operation mode.

2

6) Open the refrigerant tank and fill with refrigerant

until the rated pressure is reached.

* It is recommended not to pour the refrigerant

in too quickly, but gradually while operating a
pressure valve.

Compound
gauge

For mounting
other and of
hose when
not in use

Suspension hook

High
pressure
gauge

Hand
wheel

Finger tight
fittings

Connected to
high pressure
side

Charging line

7) Stop operation of the air conditioner.

8) Close the 3-Way valve, disconnect the

pressure gauge, and open the 3-Way valve
again.

9) Close the cap of each valve.

Samsung Electronics10

Operating Instructions & Installation

2-4-3 "Pump down" Procedure

Pump down will be carried out when an evaporator is replaced or when the unit is relocated in another area.

1) Remove the caps from the 2-Way valve and the
3-Way valve.

2) Turn the 3-Way valve clockwise to close and
connect a pressure gauge (low pressure side)
to the service valve, and open the 3-Way valve
again.

3) Set the unit to cool operation mode.
(Check if the compressor is operating.)

3-Way Valve

2-Way Valve

4) Turn the 2-Way valve clockwise to close.

5) When the pressure gauge indicates "0" turn the
3-Way valve clockwise to close.

6) Stop operation of the air conditioner.

7) Close the cap of each valve.

Relocation of the air conditioner

• Refer to this procedure when the unit is relocated.

• Carry out the pump down procedure (refer to the details of 'pump down').

• Remove the power cord.

• Disconnect the assembly cable from the indoor and outdoor units.

• Remove the flare nut connecting the indoor unit and the pipe.

• At this time, cover the pipe of the indoor unit and the other pipe using a cap or vinyl plug to avoid foreign

material entering.

• Disconnect the pipe connected to the outdoor unit.
At this time, cover the valve of the outdoor unit and the other pipe using a cap or vinyl plug to avoid foreign
material entering.

• Make sure you do not bend the connection pipes in the middle and store together with the cables.

• Move the indoor and outdoor units to a new location.

• Remove the mounting plate for the indoor unit and move it to a new location.

11Samsung Electronics

3. Disassembly and Reassembly

Stop operation of the air conditioner and remove the power cord before repairing the unit.

3-1 Indoor Unit

No Parts Procedure Remark

1 Front Grille

1) Stop the air conditioner operation and
shut off the main power.

2) Open the Front Grille by pulling right and
left sides of the hook.

3) Loosen 1 of the right screw and detach
the Terminal Cover.

4) Detach the thermistor from the Front
Grille.

5) Loosen 3 fixing screws of Front Grille.

Samsung Electronics12

Disassembly and Reassembly

No Parts Procedure Remark

6) Unlock 3 hooks to fix Panel Front and
Tray Drain.

7) Unlock 3 hooks to fix Panel Front and
Back-Body.

2

3

Control-In

(Main PCB)

Tray Drain

1) Take all the connector of PCB upper side
out. (Inclusion Power Cord)

2) Detach the outdoor unit connection wire
from the Terminal Block.

3) Loosen 4 fixing screws of Ass'y Control-In.

1) Pull Tray Drain out from the Back Body.

13Samsung Electronics

Disassembly and Reassembly

No Parts Procedure Remark

4

5

Heat Exchanger

Fan Motor

&

Cross Fan

1) Loosen 2 fixing earth screws of right side.

2) Detach the Connection Pipe.

3) Detach the Holder Pipe at the rear side.

4) Loosen the 4 fixing screws of right and left
side.

5) Lifting the Heat Exchanger up a little to
push the up side for separation from the
indoor unit.

1) Loosen the fixing screw.

2) Detach the Fan Motor from the Fan.

3) Detach the Fan From the left Holder
Bearing.

Samsung Electronics14

3-2 Outdoor Unit

■ 18K BTU

No Parts Procedure Remark

1 Common Work

1) Loosen the fixing screw of the
Cover Control.

2) Loosen the fixing screws on right and left,
back Cabinet-Side edge and a fixing screw
on the Cabinet-Front lower to detach the
Cabinet-Front.

3) Loosen the fixing screws of the
Ass'y-Control Out.

4) Loosen the fixing screws of the
Cabinet-Side RH.

5) Loosen the fixing screws of the
Cabinet-Side LF.

15Samsung Electronics

Disassembly and Reassembly

No Parts Procedure Remark

2

3

4

Fan & Motor

Heat Exchanger

Compressor

1) Detach the Nut Flange.(Turn counterclock­wise because the screw is right-handed)

2) Detach the Fan.

3) Loosen 4 fixing screws to detach
the Motor.

1) Loosen 3 fixing screws of the Bar Steel.

2) Loosen 2 fixing screws on both sides.

3) Disassemble the pipe in both inlet and
outlet with welding torch.

4) Detach the Heat Exchanger.

1) Loosen the Terminal Cover nut to open the
Terminal Cover.

2) Disassemble the cloth sound felt.

3) Disassemble the pipe in both inlet and
outlet of the Compressor with welding
torch.

4) Loosen the 3 bolts at the bottom.

5) Detach the Compressor.

Samsung Electronics16

■ 24K BTU

No Parts Procedure Remark

Disassembly and Reassembly

1 Common Work

1) Loosen the fixing screw of the Cover
Control.

2) Loosen the fixing screws of the
Cabinet-Upper.

3) Loosen the fixing screws of the
Cabinet-Side RH.

4) Loosen the fixing screws of the
Cabinet-Side LF.

5) Loosen the fixing screws of the
Ass'y Control Out.

17Samsung Electronics

Disassembly and Reassembly

No Parts Procedure Remark

2

3

4

Fan & Motor

Heat Exchanger

Compressor

1) Remove the Nut Flange (Turn to the
clockwise).

2) Detach the Fan.

3) Loosen 4 fixing screws to detach the
Motor.

1) Loosen 2 fixing screws on both side.

2) Disassemble the pipe in both inlet and
outlet with welding torch.

3) Detach the Heat Exchanger.

1) Loosen the Terminal Cover to open the
Terminal Cover.

2) Disassemble the Cloth Sound Felt.

3) Disassemble the pipe in both inlet and
outlet of the Compressor with welding
torch.

4) Loosen 3 bolts at the bottom.

5) Detach the Compressor.

Samsung Electronics18

4. Refrigerating Cycle Diagram

Indoor Unit

Outdoor Unit

Heat
Exchanger
(Evaporator)

Gas side

3-Way valve

2-Way valve

Liquid side

Capillary tube

Cooling

Gas leak check point

Cross fan

Heat
Exchanger
(Condenser)

Propeller fan

Compressor

T

1

T

2

19Samsung Electronics

4-1 Refrigerant Cycle Characteristic

Cooling Capacity(Btu/h)

30,000

20,000

10,000

25.0 35.0 45.0 55.0

Cooling Capacity Distribution

Outdoor Temp.(DB C)

DB32.4 / WB24.0
DB30.6 / WB22.5
DB27.0 / WB19.0
DB24.0 / WB17.0
DB21.0 / WB15.0

Indoor Temp.( C)

4-1-1 Capacity Distributions

Capacity Distributions according to indoor and outdoor temperature variation.

■ COOLING MODE

- Indoor Temp. Variation : 21.0˚C ~ 32.4˚C

- Outdoor Temp. Variation : 25.0˚C ~ 55.0˚C

■ 18K BTU

Cooling Capacity Distribution

30,000

Indoor Temp.( C)

DB32.4 / WB24.0
DB30.6 / WB22.5
DB27.0 / WB19.0
DB24.0 / WB17.0

20,000

DB21.0 / WB15.0

Cooling Capacity(Btu/h)

10,000

25.0 35.0 45.0 55.0

Outdoor Temp.(DB C)

■ 24K BTU

Samsung Electronics20

4-1-2 Power Consumption Distributions

Power Consumption Distributions according to indoor and outdoor temperature variation.

■ COOLING MODE

- Indoor Temp. Variation : 21.0˚C ~ 32.4˚C

- Outdoor Temp. Variation : 25.0˚C ~ 55.0˚C

■ 18K BTU

Power consumption Distribution(Cooling mode)

4,000

Refrigerating Cycle Diagram

■ 24K BTU

3,500

3,000

2,500

2,000

Indoor Temp.( C)

DB32.4 / WB24.0
DB30.6 / WB22.5
DB27.0 / WB19.0
DB24.0 / WB17.0
DB21.0 / WB15.0

Power consumption(W)

1,500

1,000

25.0 35.0 45.0 55.0

Power consumption Distribution(Cooling mode)

4,000

3,500

Outdoor Temp.(DB C)

3,000

2,500

2,000

Power consumption(W)

1,500

1,000

25.0 35.0 45.0 55.0

Outdoor Temp.(DB C)

Indoor Temp.( C)

DB32.4 / WB24.0
DB30.6 / WB22.5
DB27.0 / WB19.0
DB24.0 / WB17.0
DB21.0 / WB15.0

21Samsung Electronics

5. Set Up the Model Option

5-1 Setting Option Setup Method

ex) Option No. : (AST18WJWE)

Step 1 : Enter the Option Setup mode.

st

1

nd

2

rd

3

Step 2 : Enter the Option Setup mode and select your option according to the following procedure.

Take out the batteries of remote control.

Press the temperature button simultaneously and
insert the battery again.

Make sure the remocon display shown as .

3

1,4 2,5

Feature Display

1

Setting Option SEG1.

Push the button to set the display panel to .

Every time you push the button, the display panel reads

. . .

2

Setting Option SEG2.

Push the button to set the display panel to .

Every time you push the button, the display panel reads

. . .

3

Change it into the set display of Option SEG3 and SEG4

with the button.

4

Setting Option SEG3.

Push the button to set the display panel to .

Every time you push the button, the display panel reads

. . .

5

Setting Option SEG4.

Push the button to set the display panel to .

Every time you push the button, the display panel reads

. . .

repeatedly.

repeatedly.

repeatedly.

repeatedly.

Samsung Electronics22

Feature Display

6,9

7,10 8,11

12

13 14

6

Change it into the set display of Option SEG5 and SEG6

with the button.

7

Setting Option SEG5.

Push the button to set the display panel to .

Every time you push the button, the display panel reads

. . .

8

Setting Option SEG6.

Push the button to set the display panel to .

Every time you push the button, the display panel reads

. . .

9

Change it into the set display of Option SEG7 and SEG8

with the button.

Set Up the Model Option

repeatedly.

repeatedly.

10

Setting Option SEG7.

Push the button to set the display panel to .

Every time you push the button, the display panel reads

. . .

11

Setting Option SEG8.

Push the button to set the display panel to .

Every time you push the button, the display panel reads

. . .

12

Change it into the set display of Option SEG9 and SEG10

with the button.

13

Setting Option SEG9.

Push the button to set the display panel to .

Every time you push the button, the display panel reads

. . .

14

Setting Option SEG10.

Push the button to set the display panel to .

Every time you push the button, the display panel reads

. . .

repeatedly.

repeatedly.

repeatedly.

repeatedly.

23Samsung Electronics

Set Up the Model Option

Step 3 : Upon completion of the selection, check you made right selections.

Whenever you press the button, the set Option will be displayed.

Step 4 : Pressing the ON/OFF button ( )

When pressing the operation ON/OFF key with the direction of remote control for unit, the sound "Ding" is heard and the
OPERATION LED lamp is flickering at the same time, then the input of option is completed. (If the "ding" sound isn't heard,
try again pressing the ON/OFF button.)

Step 5 : Unit operation test-run

First, Remove the battery from the remote control.
Second, Re-insert the battery into the remote control.
Third, Press ON/OFF ( ) key with the direction of remote control for set.

• Error Mode

st

1

If all lamps of indoor unit are flickering, Plug out, plug in power plug again and press ON/OFF key to retry.

nd

2

If the unit is not working properly or all lamps are continuously flickering after setting the option code, see if the
correct option code is set up for its model.

Samsung Electronics24

5-2 Table of the option Code

Model

AS18WJWB

AS18WJWE
AST18WJWB
AST18WJWE

SC18ZWJ

AS18WJWD

AS24W6WB

AS24W6WE
AST24W6WB
AST24W6WE

SC24ZW6

Option Code

SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10

600005022E

6000050340

60000A0351

25Samsung Electronics

6. Troubleshooting

Check the basic items first to judge if the problem was caused by breakdown or misuse. If none of the basic items are related to the
problem, please scrutinize the machine according to the 'Breakdown Diagnosis by Symptoms' method.

6-1 Basic Breakdown Diagnosis Items

1. The input voltage should be rating voltage ±10% range.
The airconditioner may not operate properly if the voltage is out of this range.

2. Is the link cable linking the indoor unit and the outdoor unit linked properly?
The indoor unit and the outdoor unit shall be linked by 5 cables.
Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables.
Otherwise the airconditioner may not operate properly.

3. When a problem occurs due to the contents illustrated in the table below it is a symptom not related to the malfunction of the
airconditioner.

No

1

The OPERATION indication LED(GREEN) blinks when a
power plug of the indoor unit is plugged in for the first time.

2

In a COOL operation mode, the compressor does not
operate at a room temperature higher than the setting
temperature that the INDOOR FAN should operate.
In a HEAT operation mode, the compressor does not operate
at a room temperature lower than the setting temperature
that indoor fan should operate.

Fan speed setting is not allowed in DRY( ) mode.

3

Compressor stops operation intermittently in DRY( )

4

mode.

Compressor of the outdoor unit is operating although it is

5

turned off in a HEAT mode.

6

Timer LED(GREEN) of the indoor unit lights up and the
air conditioner does not operate.

The compressor and indoor fan stop intermittently in

7

HEAT mode.

Operation of air conditioner Explanation

It indicates power is on. The LED stops blinking if the opera­tion ON/OFF button on the remote control unit is pushed.

In happens after a delay of 3 minutes when the compressor
is reoperated. The same phenomenon occurs when a power
is on.
As a phenomenon that the compressor is reoperated after a
delay of 3 minutes, the indoor fan is adjusted automatically
with reference to a temperature of the air blew.

The speed of the indoor fan is set to LL in DRY mode.
Fan speed is selected automatically in AUTO mode.

Compressor operation is controlled automatically in DRY
mode depending on the room temperature and humidity.

When the unit is turned off while de-ice is activated,
the compressor continues operation for up to 9 minutes
(maximum) until the deice is completed.

Timer is being activated and the unit is in ready mode.
The unit operates normally if the timer operation is cancelled.

The compressor and indoor fan stop intermittently if room
temperature exceeds a setting temperature in order to protect
the compressor from overheated air in a HEAT mode.

8

Indoor fan and outdoor fan stop operation intermittently
in a HEAT mode.

The compressor stops intermittently in a COOL mode or

9

DRY mode, and fan speed of the indoor unit decreases.

The compressor operates in a reverse cycle to remove
exterior ice in a HEAT mode, and indoor fan and outdoor fan
do not operate intermittently for within 20% of the total heater
operation

The compressor stops intermittently or the fan speed of the
indoor unit decreases to prevent inside/outside air frozen
depending on the inside/outside air temperature.

Samsung Electronics26

6-2 Trouble check in the initial status

6-2-1 Diagnosis and marking of the part in trouble.

Please check the air conditioner operation status and write the check result in the chart in the room.

LAMP

Description

Indoor unit room temperature sensor error
(open or short)

Indoor unit heat exchanger temperature sensor error
(open or short)

Indoor fan motor mal function

EEPROM error

Option error
(option wasn't set up or option data error)

OPERATION TIMER TURBO

: Lamp off

6-2-2 Operation with abnormal motion

No Abnormal condition Inspection Initial Diagnosis

1

No response from
the remote control
operation signal.

2

Unable to operate the
outdoor unit

• Plug out and plug in 5 seconds later.

• Press the TURBO button with the

remote control.

• In 3 minutes, check the voltage
between the indoor unit terminal
block N1 and 1.

Able to operate the
remote control.

Unable to operate
the remote control.

AC200V ~ AC240V

No power source
displayed.

OK

Press the button in the indoor unit.

• If it operates, the remote control and
indoor unit receiver are in trouble.

• If not, the indoor unit is in trouble.

Problem with the outdoor unit or PCB

Problem with the relay (RY71) or PCB

: Lamp flickering

27Samsung Electronics

6-3 Breakdown diagnosis by symptoms

6-3-1 No Power (completely dead)-Initial diagnosis

1. Checklist :

1) Is input voltage normal?

2) Is AC power linked correctly?

3) Is input voltage of DC regulator IC KA7805 (IC02) normal? (11VDC-12.5VDC)

4) Is output voltage of DC regulator IC KA7805 (IC02) normal? (4.5VDC-5.5VDC)

2. Troubleshooting procedure

Unplug the power cord and plug it after 5 seconds

Press the Power Button on

the remote control unit to operate the air

conditioner

does not operate

◆ Check the indoor unit control board

Check whether two wires

of power cord are connected correctly to the

terminal block and control board.

Yes

Check whether the fuse

on the control board is normal.

F701: 3.15[A]/250[V]

Yes

operate

No

No

◆ Check the display board

Reconnect wires correctly

Replace fuse

Check the output of
SMPS on the control board.
Input power: AC230±15%[V]

IC02 Input: DC12[V]
IC02 output: DC5[V]

Yes

◆ Check the setting temperature

No

Replace the control board

Samsung Electronics28

6-3-2 When the Indoor Unit Fan Does Not Operate. (Initial Diagnosis)

1. Checklist :

1) Is the indoor unit fan motor properly connected with the connector (CN72)?

2) Is the AC voltage correct?

3) Is HALL IC in indoor fan motor properly connected with the connector (CN44)?

4) Is the running capacitor (CR71) properly connected with PCB board?

2. Troubleshooting procedure

After unplugging out the power cord should

be reconnected within 5 seconds.

Yes

Troubleshooting

Does the OPERATION lamp blink?

Yes

Does the Solid State Relay(SS71) work properly?

Test rod location

+

SS71- SS71- 12V

Is the supply voltage of the fan motor sufficient?

Test rod location

PCB CN72 Condition

pin #3 and #5 Fan operate

-

Yes

Yes

Normal
Voltage

Normal
Voltage

About AC

180V

No

No

No

Motor Fan-Capacitor is out of order

Micom is

out of order.

PCB is

out of order.

Check as in the procedure

"No power parts"

Micom

should be replaced

PCB should be

replaced.

Replace Motor

Fan-Capacitor

Fan motor

is out of order.

Fan motor

should be replaced.

29Samsung Electronics

Troubleshooting

6-3-3 When the Outdoor Unit Does Not Operate. (Initial Diagnosis)

1. Checklist :

1) Is input voltage normal?

2) Is the set temperature of the remote control higher than room temperature in COOL mode?

3) Is the set temperature of the remote control lower than room temperature in HEAT mode?

4) Is the POWER IN connector (CN71) linked correctly?

5) Is the outdoor unit properly connected with the TERMINAL BLOCK connector(N1, L1, 1, 2, 3, 4)?

2. Troubleshooting procedure

After unplugging out the power cord should be

reconnected within 5 seconds.

Does the OPERATION lamp blink

Yes

Does the timer lamp blink during operation?

No

#

Is the power relay RY71 operated by adjusting

the room temperature?

Test rod location

+ Condition-

IC04 Pin No.38 RY71 ONGND DC4.8V

Yes

Is rating voltage ±10% range applied relay between

Terminal block No. N1 and No. 1

Yes

Normal
Voltage

Yes

No

No

No

!

Power relay is

Check as in the procedure

"No Power parts"

Room temperature sensor is

out of order

@

Micom is

out of order.

out of order

PCB should be checked.

Outdoor unit is out of order.

PCB should be checked.

Power relay should be

replaced.

!

Yes

Is the room sensor normal register?

10°C20°C

12.09kΩ17.96kΩ 8.3kΩ

No

@

30°C

#

Samsung Electronics30

6-3-4 When the UP/DOWN Louver Motor Does Not Operate. (Initial Diagnosis)

1. Checklist :

1) Is input voltage normal?

2) Is the UP/DOWN louver motor properly connected with the connector (CN61)?

2. Troubleshooting procedure

Troubleshooting

Remove power cord and plug in again in approx.

5 seconds.

Does the OPERATION lamp blink?

Yes

Does operation start when

swing button of the remote control unit

pushed?

No

Voltage at pin #57~#60

of micom (IC04) change?

(Squarewave)

Yes

Voltage at pin #13 ~ #16 of

IC06(ULN2003A) change?

(Squarewave)

No

Yes

No

No

Check as in the procedure

"No Power parts".

Normal

Micom (IC04) is faulty.

Driver IC06/08 (ULN2003A) is faulty.

Yes

UP/DOWN louver motor is faulty.

31Samsung Electronics

Troubleshooting

6-3-5 In the HEAT mode, When there is no warm air current. Check this fist;

1) Is the set temperature of Remote Control lower than room temperature in Heat mode?

2) Is the Indoor PCB properly connected with the CN71 connector?

After training on, the heating operation

should start in 5 minutes.

No

Is the number #38 of Micom (IC04)

DC5.0V?

Yes

Is the number checking

#13 of IC05 (ULN2003A) LOW?

Yes

Is the voltage between

CN71 #1 and CN71 #5 rating voltage

±10% range

Yes

Abnormal 4-Way valve of Outdoor Unit.

or connecting Cable

4-Way valve should be replaced

or connecting Cable Check.

No

No

No

No

Abnormal Micom

Abnormal Micom

Abnormal IC05

Abnormal RY73

PCB should be replaced.

Samsung Electronics32

6-3-6 Room temperature sensor failure

Description

Indoor unit room temperature sensor error(open or short)

Troubleshooting

LAMP

OPERATION TIMER TURBO

Detach the assembly sensor from the

ASS'Y PCB CN43 connector and measure

the sensor resistance with an ohmmeter (tester).

Is the sensor resistance value

10KΩ ±3% at the room temperature

of 25˚C?

Yes

Connect the sensor to CN43,

supply power, and measure the voltage of

#1 and #2 of the CN43 connector.

Below 0.5V?

No

Yes

: Lamp off

ASS'Y Sensor Replace

SENSOR Resistance Value : 20˚C-12.09kΩ

SENSOR Resistance Value : 30˚C-8.31kΩ
SENSOR Resistance Value : 35˚C-6.94kΩ
SENSOR Resistance Value : 40˚C-5.83kΩ

Poor ASS'Y PCB Replace

: Lamp flickering

No

Over 4.9V?

No

MICOM Error or Connector(CN43) check

Yes

Poor ASS'Y PCB Replace

33Samsung Electronics

Troubleshooting

6-3-7 Room Pipe sensor failure

Description

Indoor unit heat exchanger temperature sensor error
(open or short)

LAMP

OPERATION TIMER TURBO

: Lamp off

: Lamp flickering

1. Check the assembly condition of the sensor connector(CN43) on the indoor unit Main PCB and if not assembled, reassemble the
connector accurately.

2. Detach the room pipe sensor connector(CN43) and check the resistance between connector 3 and 4.

Temperature(˚C)

15

20

25

Resistance Value(Kohm)

14.68

12.09

10

Temperature(˚C)

30

35

40

Resistance Value(Kohm)

8.31

6.94

5.83

Others

The data tolerance

is ±3%.

If the above data is not met, replace the room pipe sensor.

3. Assemble the room pipe sensor to PCB, plug in, and check the voltage of connector 3 and 4. If the resistance is below 0.5V or
over 4.9V, replace the indoor Main PCB. (short or disconnected in the PCB board)

6-3-8 When the remote control is not receiving.

1. Check if the connector was normally assembled.

2. Put the set in operation and check the voltage of No. 3(+) and No. 2(-) of the main PCB CN91 while operating the
remote control. When the voltage descends below 3V, the assembly module PCB is normal and the main PCB is poor.
Then replace the main PCB.

3. Replace the assembly display PCB because the module PCB is poor if the voltage between No. 2~3 of CN91
maintains 5V after the remote control starts operation.

Samsung Electronics34

6-4 PCB Inspection Method

6-4-1 Pre-inspection Notices

1. Check if you pulled out the AC power plug when you eliminate the PCB or front panel.

2. Don't hold the PCB side not impose excessive force on it to eliminate the PCB.

3. Don't pull the lead wire but hold the whole housing to connect or disconnect a connector to the PCB.

6-4-2 Inspection Procedure

1. Check connector connection and peeling of PCB or bronze coating pattern when you think the PCB is broken.

2. The PCB is composed of the 3 parts.

● Main PCB Part : MICOM and surrounding circuit, relay, room fan motor driving circuit and control circuit, sensor driving circuit,

power circuit of DC12V and DC5V, and buzzer driving circuit.

● Display part : LED lamp

● Switch part : Switch

6-4-3 Detailed Inspection Procedure

No Procedure Inspection Method Cause

1

Plug out and pull the PCB
out of the electronic box.
Check the PCB fuse.

Supply power.

2

If the operating lamp
twinkles at this time,
the above 1)~3) have
no relation.

3

Press the ON/OFF button
and operate TURBO
mode.
But, exclude the
RESERVE operation.

Press the ON/OFF button.

4

1. FAN Speed [High]

2. Continuous Operation

1) Is the fuse disconnected? (F701)

Checking the power voltage.

1) Is the DB71input voltage AC200V~AC240V?

2) Is the voltage between both terminals of the
C102 on the 2
±0.5V?

3) Is the voltage between both terminals of OUT
and GND of IC02(KA78L05) DC5V ±0.5V?

Checking the power voltage.

1) Check the voltage of the relay(RY71) coil(IC05 PIN
#11 and GND : 0V, PIN#6 and GND : 5V) during
operation(3 minutes after TURBO operation).

2) Check the voltage of both terminals of
terminal block 1 and N1 after 3 minute
operation.: AC220V

1) Is the voltage over AC180V being imposed
on terminal #3 and #5 of the fan motor
connector(CN72)?

nd

side of the transformer AC12V

• Overcurrent

• Indoor Fan Motor Short

• AC Part Pattern Short of the MAIN PCB

• Power Cord is fault, Fuse open. Wrong

Power Cable Wiring, AC Part is faulty.

• Switching Trans or Power Circuit is faulty

• Power Circuit is faulty, Load Short

• Relay(RY71) Coil Disconnection, IC05 is

faulty

• Relay(RY71) Contact is faulty

• Fan Motor of the indoor is faulty

2) The fan motor of the indoor unit doesn't run.

3) The power voltage between terminal #3 and #5
of the connector(CN72) is 0V.

• Fan Motor Connector(CN72) is faulty

• ASS'Y Main PCB is faulty

• Connection is faulty

35Samsung Electronics

Troubleshooting

70

60

50

40

30

20

10

0

-10

-9

510152025303540

6-4-4 Temperature Sensor Feature Conversion Table(Room Temperature Sensor); 103AT

Temperature

[˚C]

70
69
68
67
66
65
64
63
62
61
60

59
58
57
56
55
54
53
52
51
50

Sensor Resistance

[Kohm]

2.229

2.296

2.365

2.437

2.512

2.589

2.669

2.752

2.838

2.928

3.021

3.116

3.216

3.319

3.426

3.537

3.652

3.772

3.897

4.026

4.161

Temperature

[˚C]

49
48
47
46
45
44
43
42
41
40

39
38
37
36
35
34
33
32
31
30

Sensor Resistance

[Kohm]

4.300

4.444

4.594

4.749

4.912

5.080

5.256

5.439

5.630

5.828

6.033

6.246

6.468

6.699

6.941

7.192

7.455

7.729

8.015

8.313

Temperature

[˚C]

29
28
27
26
25
24
23
22
21
20

19
18
17
16
15
14
13
12
11
10

Sensor Resistance

[Kohm]

8.622

8.944

9.281

9.632
10

10.380

10.780

11.200

11.630

12.090

12.560

13.060

13.570

14.120

14.680

15.280

15.900

16.550

17.240

17.960

Temperature

[˚C]

9
8
7
6
5
4
3
2
1
0

-1

-2

-3

-4

-5

-6

-7

-8

-9

Sensor Resistance

[Kohm]

18.700

19.480

20.290

21.150

22.050

22.990

23.900

25.030

26.130

27.280

28.470

29.720

31.040

32.430

33.890

35.430

37.050

38.760

40.560

Temperature Sensor Characteristic Curve

Temperature

(˚C)

At the temperature of 25˚C(10KΩ)

Resistance Value (Kohm)

Samsung Electronics36

6-5 Main Part Inspection Method

Breakdown Inspection MethodPart

Room Temperature Sensor

Room Fan Motor

Outdoor Fan Motor

Measure resistance with a tester

Normal At the normal temperature 37kΩ~ 8.3kΩ(-7˚C~+30˚C)

Abnormal ∞, 0Ω

Measure the resistance between terminals of the connector (CN72) with a tester.

Normal At the normal temperature (10˚C ~ 30˚C)

Abnormal ∞, 0Ω

Measure the resistance between motor wires with a tester.

Normal At the normal temperature (10˚C ~ 30˚C)

. . .

Open or Short

Compare terminal Resistance Remark

Yellow, Blue 404.4Ω ± 10% Main

Yellow, Red 340Ω ± 10% Sub

. . .

Open or Short

Compare terminal Resistance Remark

Yellow, Red 360Ω ± 10% Main

Black, Yellow 328Ω ± 10% Sub

*Refer to Table 6-4-4.

Stepping Motor

Abnormal ∞, 0Ω

Measure the resistance between the red wire and each terminal wire with a tester.

Normal About 300Ω at the normal temperature (20˚C ~ 30˚C)

Abnormal ∞, 0Ω

. . .

Open or Short

. . .

Open or Short

37Samsung Electronics

1

14

6

1-2

1-1

16

2-3

2-2

3-7

17

10

4

9

7

2-1

2

5-1

5-4

5-2

5

3

8

5-3

3-4

3-6

3-8

3-1

3-2

3-5

3-3

11

13

15

12

7. Exploded Views and Parts List

7-1 Indoor Unit

You can search for the updated part code
number through the ITSELF.

URL : http://itself.sec.samsung.co.kr

Samsung Electronics38

Exploded Views and Parts List

■

Parts List

Q'TY

No. Code No. Description Specification

1 DB94-00615A ASS'Y BACK BODY ASS'Y 1 1 1 1

1-1 DB61-01974A BODY BACK HIPS 1 1 1 1

1-2 DB69-01039A CUSHION-BACK BODY FO-PS 1 1 1 1

2 DB96-03913A ASS'Y CYCLE IN ASS'Y 1 1 1 1

2-1 DB63-01065A COVER-BEARING ABS 1 1 1 1

2-2 DB60-00192A SPACER-EVAP LOW PVC 1 1 1 1

2-3 DB96-03754D ASS'Y EVAP 1.5 SLIT 2x16 1 1 1 1

3 DB94-00616B ASS'Y TRAY DRAIN ASS'Y 1 1 1 1

3-1 DB63-01071A TRAY-DRAIN HIPS 1 1 1 1

3-2 DB61-01975B BLADE-H ABS 1 1 1 1

3-3 DB61-01976A BLADE-V PP 2 2 2 2

3-4 DB63-01066A TRAY-STABILIZER HIPS 1 1 1 1

3-5 DB69-01024A INSU TRAY RH FO-PS 1 1 1 1

3-6 DB73-00180A RUBBER-CAP DRAIN GUM-EPM 1 1 1 1

3-7 DB31-00285A MOTOR-STEP MSFCC20A01 1 1 1 1

3-8 DB94-00458B ASS'Y DRAIN-HOSE ASS'Y 1 1 1 1

4 DB93-02830H ASS'Y CONTROL IN ASS'Y - 1 1 1

DB93-02830B ASS'Y CONTROL IN ASS'Y 1 - - -

5 DB92-00632E ASS'Y PANEL FRONT ASS'Y - - 1 -

DB92-00632F ASS'Y PANEL FRONT ASS'Y 1 1 - -

DB92-00632C ASS'Y PANEL FRONT ASS'Y - - - 1

5-1 DB64-01184B PANEL FRONT ABS 1 1 1 1

5-2 DB64-01182B GRILLE-INLET ABS 1 1 1 1

5-3 DB93-02867B ASSY DISPLAY ASS'Y 1 1 1 1

5-4 DB63-01186A GUARD-AIR FILTER PP - - 1 -

DB63-01186C GUARD-AIR FILTER PP 1 1 - 1

6 DB70-00505A PLATE-HANGER SGCC-P 1 1 1 1

7 DB61-01981A HOLDER-PIPE HIPS 1 1 1 1

8 DB63-01063A COVER-CONTROL HIPS 1 1 1 1

9 DB93-02532G ASSY REMOCON ASS'Y - - 1 -

DB93-02532A ASSY REMOCON ASS'Y 1 1 - 1

10 DB96-03817A ASS'Y EVAP-SUPPORT ASS'Y 1 1 1 1

11 DB31-00267A MOTOR FAN YFK 40 4C 1 1 1 1

12 DB94-00456B ASS'Y-CROSS FAN ASS'Y 1 1 1 1

13 DB97-02075A ASS'Y-BOLT SPECIAL M5xL6 1 1 1 1

14 DB73-00181A RUBBER-BEARING RUBBER 1 1 1 1

15 DB94-40007A ASS'Y BEARING-MOTOR ASS'Y 1 1 1 1

16 DB61-01977A BRACKET-EVAP SGCC-M 1 1 1 1

17 DB93-01638D POWER CORD 250V,20A 1 - 1 1

DB93-01638E POWER CORD 250V,20A - 1 - -

AS18WJWB
AS18WJWE

AS18WJWD

AST18WJW✳

SC18ZWJ

39Samsung Electronics

Exploded Views and Parts List

■

Parts List

No. Code No. Description Specification

1 DB94-00615A ASS'Y BACK BODY ASS'Y 1 1 1

1-1 DB61-01974A BODY BACK HIPS 1 1 1

1-2 DB69-01039A CUSHION-BACK BODY FO-PS 1 1 1

2 DB96-03809A ASS'Y CYCLE IN ASS'Y 1 1 1

2-1 DB63-01065A COVER-BEARING ABS 1 1 1

2-2 DB60-00192A SPACER-EVAP LOW PVC 1 1 1

2-3 DB96-03754C ASS'Y EVAP 1.3 SLIT 2x16 1 1 1

3 DB94-00616B ASS'Y TRAY DRAIN ASS'Y 1 1 1

3-1 DB63-01071A TRAY-DRAIN HIPS 1 1 1

3-2 DB61-01975B BLADE-H ABS 1 1 1

3-3 DB61-01976A BLADE-V PP 2 2 2

3-4 DB63-01066A TRAY-STABILIZER HIPS 1 1 1

3-5 DB69-01024A INSU TRAY RH FO-PS 1 1 1

3-6 DB73-00180A RUBBER-CAP DRAIN GUM-EPM 1 1 1

3-7 DB31-00285A MOTOR-STEP MSFCC20A01 1 1 1

3-8 DB94-00458B ASS'Y DRAIN-HOSE ASS'Y 1 1 1

4 DB93-02830D ASS'Y CONTROL IN ASS'Y 1 1 1

5 DB92-00632E ASS'Y PANEL FRONT ASS'Y - 1 -

DB92-00632F ASS'Y PANEL FRONT ASS'Y 1 - -

DB92-00632C ASS'Y PANEL FRONT ASS'Y - - 1

5-1 DB64-01184B PANEL FRONT ABS 1 1 1

5-2 DB64-01182B GRILLE-INLET ABS 1 1 1

5-3 DB93-02867B ASSY DISPLAY ASS'Y 1 1 1

5-4 DB63-01186A GUARD-AIR FILTER PP - 1 -

DB63-01186C GUARD-AIR FILTER PP 1 - 1

6 DB70-00505A PLATE-HANGER SGCC-P 1 1 1

7 DB61-01981A HOLDER-PIPE HIPS 1 1 1

8 DB63-01063A COVER-CONTROL HIPS 1 1 1

9 DB93-02532G ASSY REMOCON ASS'Y - 1 -

DB93-02532A ASSY REMOCON ASS'Y 1 - 1

10 DB96-03817A ASS'Y EVAP-SUPPORT ASS'Y 1 1 1

11 DB31-00267A MOTOR FAN YFK 40 4C 1 1 1

12 DB94-00456B ASS'Y-CROSS FAN ASS'Y 1 1 1

13 DB97-02075A ASS'Y-BOLT SPECIAL M5xL6 1 1 1

14 DB73-00181A RUBBER-BEARING RUBBER 1 1 1

15 DB94-40007A ASS'Y BEARING-MOTOR ASS'Y 1 1 1

16 DB61-01977A BRACKET-EVAP SGCC-M 1 1 1

17 DB93-01638D POWER CORD 250V,20A - - -

DB93-01638E POWER CORD 250V,20A - - -

AS24W6W✳ AST24W6W✳

SC24ZW6

Q'TY

Samsung Electronics40

MEMO

41Samsung Electronics

7-2 Outdoor Unit

3-1

3-2

16

21

10

5

8

18

11

12

13

6

3

1

7

15

17

4

9

2

19

20

14

14-2

14-3

14-1

■ 18K BTU

Samsung Electronics42

■

Parts List

Exploded Views and Parts List

No. Code No. Description Specification

Q'TY

US18WJWB UST18WJWB US18WJWD

1 DB90-01711A ASS'Y-CABI FRONT ASS'Y 1 1 1

2 DB63-00847A GUARD FAN HIPS 1 1 1

3 DB90-01713A ASS'Y-CABI SIDE LF ASS'Y 1 1 1

3-1 DB64-00982A CABINET-SIDE LF SECC-P 1 1 1

3-2 DB64-00992A HANDLE-LF PP 1 1 1

4 DB90-01712A ASS'Y-CABI SIDE RH ASS'Y 1 1 1

5 DB63-01172A COVER-CONTROL ABS V0 1 1 1

6 DB90-01681A ASS'Y BASE OUT ASS'Y - - 1

DB90-01681B ASS'Y BASE OUT ASS'Y 1 1 -

7 DB61-02068A BRACKET-VALVE SECC-P 1 1 1

8 DB94-00638A ASS'Y PARTITION ASS'Y 1 1 1

9 DB61-01644A BRACKET MOTOR SGCC-M 1 1 1

10 DB97-02225B ASS'Y SUPPORT-PLATE B/M ASS'Y 1 1 1

11 DB31-00265E MOTOR FAN YDK95-45-4-1 - - 1

DB31-00265F MOTOR FAN YDK95-45-6-1 1 1 -

12 DB67-00238A FAN-PROPELLER AS+GF20% 1 1 1

13 DB60-30020A NUT-FLANGE M6 1 1 1

14 DB93-02966A ASS'Y CONTROL OUT ASS'Y - - 1

DB93-02966B ASS'Y CONTROL OUT ASS'Y - 1 -

DB93-02967B ASS'Y CONTROL OUT ASS'Y 1 - -

14-1 2301-001370 C-FILM 2.5uF/450VAC 1 1 1

14-2 2501-001240 C-OIL 50uF/450VAC - - 1

2501-001239 C-OIL 45uF/450VAC 1 1 -

14-3 DB65-00167A TERMINAL BLOCK 2P - 1 1

DB65-00164C TERMINAL BLOCK 8P 1 - -

15 48D190IT1EH-SS ROTARY COMPRESSOR ASS'Y 1 1 -

48B180MT3EH-SS ROTARY COMPRESSOR ASS'Y - - 1

16 DB96-03964A ASS'Y COND ASS'Y 1 1 1

17 DB62-03032A INSULATION-SOUND FELT 1 1 1

18 DB96-04356B ASS'Y TUBE CAPILLARY ASS'Y 1 1 1

19 DB96-04350A ASS'Y TUBE DISCHARGE ASS'Y - - 1

DB96-04350B ASS'Y TUBE DISCHARGE ASS'Y 1 1 -

20 DB96-04349A ASS'Y TUBE SUCTION ASS'Y 1 1 1

21 DB71-00093A BAR-STEEL HSWR 1 1 1

43Samsung Electronics

Exploded Views and Parts List

■

Parts List

Q'TY

No. Code No. Description Specification

1 DB90-01711A ASS'Y-CABI FRONT ASS'Y 1 1

2 DB63-00847A GUARD FAN HIPS 1 1

3 DB90-01713A ASS'Y-CABI SIDE LF ASS'Y 1 1

3-1 DB64-00982A CABINET-SIDE LF SECC-P 1 1

3-2 DB64-00992A HANDLE-LF PP 1 1

4 DB90-01712A ASS'Y-CABI SIDE RH ASS'Y 1 1

5 DB63-01172A COVER-CONTROL ABS V0 1 1

6 DB90-01681A ASS'Y BASE OUT ASS'Y 1 1

7 DB61-02068A BRACKET-VALVE SECC-P 1 1

8 DB94-00638A ASS'Y PARTITION ASS'Y 1 1

9 DB61-01644A BRACKET MOTOR SGCC-M 1 1

10 DB97-02225B ASS'Y SUPPORT-PLATE B/M ASS'Y 1 1

11 DB31-00265E MOTOR FAN YDK95-45-4-1 1 1

12 DB67-00238A FAN-PROPELLER AS+GF20% 1 1

13 DB60-30020A NUT-FLANGE M6 1 1

14 DB93-02966A ASS'Y CONTROL OUT ASS'Y - 1

DB93-02967A ASS'Y CONTROL OUT ASS'Y 1 -

14-1 2301-001370 C-FILM 2.5uF/450VAC 1 1

14-2 2501-001240 C-OIL 50uF/450VAC 1 1

14-3 DB65-00167A TERMINAL BLOCK 2P - 1

DB65-00164C TERMINAL BLOCK 8P 1 -

15 48B200JT1EH-SS ROTARY COMPRESSOR ASS'Y 1 1

16 DB96-03964A ASS'Y COND ASS'Y 1 1

17 DB62-03032A INSULATION-SOUND FELT 1 1

18 DB96-04356A ASS'Y TUBE CAPILLARY ASS'Y 1 1

19 DB96-04350A ASS'Y TUBE DISCHARGE ASS'Y 1 1

20 DB96-04349A ASS'Y TUBE SUCTION ASS'Y 1 1

21 DB71-00093A BAR-STEEL HSWR 1 1

US18WJWE

SC18ZWJX

UST18WJWE

Samsung Electronics44

MEMO

45Samsung Electronics

Exploded Views and Parts List

3

2

1

11

7

17

8

16-1

16-2

16-3

16

16-4

18

19

10

9

4

5

6

15

14

12

13

■ 24K BTU

Samsung Electronics46

Exploded Views and Parts List

■

Parts List

Q'TY

No. Code No. Description Specification

1 DB90-01146C ASS'Y-CABI FRONT ASS'Y 1 1

2 DB90-00970J ASS'Y BASE OUT-PART ASS'Y 1 1

3 DB67-00142A FAN-PROPELLER AS+GF20% 1 1

4 DB60-30020A NUT-FLANGE M6 1 1

5 DB31-00264D MOTOR FAN YDK95-60-4-1 1 -

DB31-00264C MOTOR FAN YDK95-60-6-1 - 1

6 DB61-00686A BRACKET MOTOR SGCC-M 1 1

7 DB94-00649A ASS'Y PARTITION ASS'Y 1 1

8 DB96-04353A ASS'Y COND ASS'Y 1 1

9 DB90-40176B ASS'Y COVER-CONTROL ASS'Y 1 1

10 DB90-01651A ASS'Y-CABI SIDE RH ASS'Y 1 1

11 DB90-10616G ASS'Y CABI-UP ASS'Y 1 1

12 55B260JT1EM-SS ROTARY COMPRESSOR ROTARY 1 -

55A260IT1EM-SS ROTARY COMPRESSOR ROTARY - 1

13 DB96-04351A ASS'Y TUBE SUCTION ASS'Y 1 1

14 DB96-04352A ASS'Y TUBE DISCHARGE ASS'Y 1 -

DB96-04352B ASS'Y TUBE DISCHARGE ASS'Y - 1

15 DB96-04357A ASS'Y TUBE CAPILLARY ASS'Y 1 -

DB96-04357C ASS'Y TUBE CAPILLARY ASS'Y - 1

16 DB93-03238A ASS'Y CONTROL OUT ASS'Y 1 -

DB93-03238D ASS'Y CONTROL OUT ASS'Y - 1

16-1 3501-000305 RELAY EL200/240A1-F 1 1

16-2 2501-001239 C-OIL 45uF/450VAC 1 -

2501-001240 C-OIL 50uF/450VAC - 1

16-3 DB65-00164B TERMINAL BLOCK 8P 1 1

16-4 2301-001379 C-FILM 4uF/450VAC 1 1

17 DB72-00630C INSULATION-SOUND FELT 1 1

18 DB90-01351A ASS'Y CABINET-LF ASS'Y 1 1

19 DB71-00088A BAR-STEEL MSWR 1 1

US24W6WE

UST24W6WE

SC24ZW6X

US24W6WB

UST24W6WB

47Samsung Electronics

DB93-02829B

DB93-02925A DB93-02924B

7-3 Ass'y-Control In

N1 NATURAL

L1 LIVE

1 COMPRESSOR

2 FAN HIGH

3 FAN LOW

■

Parts List

No.

1

2

3

4

5

6

7

8

9

10

11

12

DB61-01979A

DB93-02829B

DB93-02925A

DB93-02924B

DB93-02788B

DB93-02788D

DB93-02793A

DB70-00507A

DB61-01980A

6001-000929

6001-001054

DB39-00147A

DB32-00020D

DB63-00851A

DB73-00242B

DescriptionCode No. Q'TY Remark

CASE-CONTROL IN

ASS'Y-TERMINAL BLOCK

ASS'Y-TERMINAL BLOCK

ASS'Y-TERMINAL BLOCK

ASS'Y-MAIN PCB

ASS'Y-MAIN PCB

ASS'Y-S/W & DISPLAY PCB

PLATE-TERMINAL LOW

HOLDER-WIRE CLAMP

SCREW-MACHINE

SCREW-MACHINE

C/W STEP MOTOR UP/DOWN

ASS'Y-THERMISTOR

COVER LAMP

RUBBER-BAND

Specification

ABS(V0)

ASS'Y

ASS'Y

ASS'Y

ASS'Y

ASS'Y

ASS'Y

SGCC-M, T1.2

ABS

PH M3xL22

TH M4xL10

ASS'Y

4P(103AT)

ABS(V0)

RUBBER

1

1

1

1

1

1

1

1

1

1

3

1

1

1

1

24K BTU

AST18WJW✳

AS18WJW✳ / SC18ZWJ

24K BTU

18K BTU

S/N

S/N

Samsung Electronics48

8. Block Diagram

HEAT EXCHANGER SENSOR

ROOM TEMPERATURE SENSOR

INFRARED SIGNAL

REMOTE CONTROL

POWER ON/OFF

MODE
(AUTO, COOL, DRY,
FAN, HEAT(*))

TURBO OPERATION

CONTROLLER

• BLADE CONTROL

• INDOOR FAN MOTOR CONTROL

• COMPRESSOR CONTROL

• TEMPERATURE CONTROL

• TIMER

RESET
CIRCUIT

OSCILLATION
CIRCUIT

• COMPRESSOR CONTROL
SIGNAL

• STEPPING MOTOR
CONTROL SIGNAL

• BUZZER CONTROL SIGNAL

• OUTDOOR FAN MOTOR

CONTROL SIGNAL

• 4-WAY VALVE CONTROL
SIGNAL(*)

• BUZZER CONTROL

• OUTDOOR FAN MOTOR CONTROL

• 4-WAY VALVE CONTROL(*)

IC-MCU

TRIGGER

SIGNAL

SSR

DISPLAY PART

OPERATION

TIMER

TURBO

ZERO

VOLTAGE

DETECT

INDOOR FAN MOTOR

1HR TIMER

FAN SPEED SELECT

(H/M/L)

FLAP

ON, OFF TIMER

SELECT

TEMPERATURE

SELECT

SLEEP SELECT

ENERGY SAVING

BATTERY CHECK

• COMPRESSOR DRIVE

• OUTDOOR FAN MOTOR

DRIVE

• STEPPING MOTOR DRIVE

• BUZZER DRIVE

• 4-WAY VALVE DRIVE(*)

DC5V

VOLTAGE REGULATOR

DC12V

SMPS POWER BLOCK

AC INPUT

COMPRESSOR

OUTDOOR FAN MOTOR

4-WAY VALVE(*)

BUZZER

STEPPING MOTOR

: BLADE UP/DOWN

✳ (*)marks : In case of heat pump model.

49Samsung Electronics

9. Wiring Diagram

9-1 Indoor Unit

■ AST18WJWB/ AST18WJWE

Code No : DB98-20816A

This Document can not be used without Samsung's authorization.

Samsung Electronics50

Indoor Unit(cont.)

■ AS18WJW✳ / SC18ZWJ

Code No : DB98-20815A

This Document can not be used without Samsung's authorization.

51Samsung Electronics

Wiring Diagram

■ 24K BTU

Code No : DB98-20813A

This Document can not be used without Samsung's authorization.

Samsung Electronics52

9-2 Outdoor Unit

■ UST18WJWB/ UST18WJWE

MARK NAME

FM FAN MOTOR

■ US18WJW✳ / SC18ZWJX

MARK NAME

FM FAN MOTOR

Code No : DB98-20936A

Code No : DB98-21316A

This Document can not be used without Samsung's authorization.

53Samsung Electronics

Wiring Diagram

■ 24K BTU

MARK NAME

FM FAN MOTOR

Code No : DB98-20929A

This Document can not be used without Samsung's authorization.

Samsung Electronics54

MEMO

55Samsung Electronics

MEMO

Samsung Electronics56

ELECTRONICS

This Service Manual is a property of Samsung Electronics Co., Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law.

© Samsung Electronics Co., Ltd. Jan. 2005.

Printed in Korea.
Code No. DB98-21180A(1)