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

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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

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

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

BTU/h

/min

W/W

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

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

BTU/h

/min

W/W

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

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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)

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)

25.0 35.0 45.0 55.0

Low Pressure Distribution(Cooling mode)

Outdoor Temp.(DB C)

■ 18K BTU

■ 24K BTU

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2. Operating Instructions & Installation

2-1 The Feature of Key in remote control

FUNCTIONBUTTONNo

(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.

(DOWN)

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

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

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.

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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.

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2-3 Installation

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.

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.

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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

Gas pipe side

Liquid pipe side

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.

(gas)

(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.

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.

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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.

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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.

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

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.

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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.

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Disassembly and Reassembly

No Parts Procedure Remark

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.

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■ 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.

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