SAMSUNG AS18A1UE Service Manual

ROOM AIR CONDITIONER

AS180UE

AS181UE

AS18A1UD

AS18A1UE

AS-2408BR

SERVICE Manual

AIR CONDITIONER

CONTENTS

1. Precautions

2. Product Specifications

3. Operating Instructions and

Installation

4. Disassembly and Reassembly

5. Troubleshooting

6. Exploded Views and Parts List

7. Block Diagrams

8. PCB Diagrams

9. Wiring Diagrams

10. Schematic Diagrams

©Samsung Electronics Co., Ltd. FEB. 1999. Printed in Korea.

Code No. DB81-10161A(3)

1. Precautions

1)Remove power cable from power outlet.

Remove power cable from an outlet prior to disassembly for repair.

When the power cable is removed wait for at least 1 minute and measure the voltage between the + and - terminal of the large capacity electrolyti capacitor using a tester. Make sure that the voltage is less than DC 10V, then starts repairing.

2)Warning about electrical shock

If you cannot avoid checking the circuits with power not disconnected pay special attention not to touch live parts to avoid electric shock.

3)Use proper parts

Use genuine parts of a model if parts need to be replaced. (It is recommended that parts are replaced rather than repaired, to avoid electrical contact. Customers should refrain from repairing parts themselves as this can be extremely dangerous.)

4)Use proper tools

Use proper tools for repair and be familiarized with handling test equipment.

Using worn out tools may result in problems such as intermittent contact, etc.

5)Lead wire or power cable damaged

Check if lead wire or power cord is damaged prior to repair, and replace if damaged.

6)Avoid tapping a power cord

Tapping a power cable or using an extension cord from a power outlet is dangerous and should be avoided. It may result is malfunctioning or fire.

7)Checking insulation

Be sure to check insulation resistance when assembly is completed. (Check insulation resistance between the power

cord plug and ground terminal using an ohm meter and check if it is greater than 30MΩ prior to applying the power.)

8)Check grounding

Check grounding status and fix it if not sufficient.

9)Check installation condition

Check installation condition and fix insufficient conditions. If it is still not satisfactory find another area for installation.

10)Child care

It is recommended to have children stay away the units when the repair is being done to avoid accidents.

dangerous

inter connection

Cleaning

Brilliantly

Clean the unit and the area arount it.

Let the customer know that the unit has been repaired.

Samsung Electronics

1-1

M E M O

1-2	Samsung Electronics

2. Product Specifications

2-1 AS180UE/AS181UE/AS18A1UE/AS18A1UD/AS-2408BR

Model

AS180UE/AS181UE/AS18A1UE

AS18A1UD

AS-2408BR

Item

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

Type

Wall-mounting

Cooling

BTU/h

17,500(*17,000)

17,000 (5,000W)

22,000

Dehumiditying

l/h

1.6

2.8

Perfor-

Low temp. heating

BTU/h

mance

Air volume

Cooling

m3/min

13.8

14.3

Noise

Cooling

Energy efficiency ratio

Cooling

BTU/h.W

9.7(*9.4)

9.2

10.5

Power

V-Hz

1-220 / 240-50

1-200 / 220-50

1-220-60

Power

Power Consumption

Cooling

1800

1850

2100

Operating Current

Cooling

8.0

9.3

10.0

Electri-

cal

Power factor

Cooling

93.8 (at 240V)

90.9 (at 220V)

95.4

Chara-

Starting current

cteris-

Power cable

Length

6.2

tics

Number of core wire

3G x 2.5mm2/Area

3G, AWG14

Fuse capacity

3.15

Outer

Width x Height

1050x298x180

787x620x320

1050x298x180

787x620x320

1050x298x180

787x620x320

dimension

x Depth

inch

41.34x11.73x7.09

30.98x24.4x12.6

41.34x11.73x7.09

30.98x24.4x12.6

41.34x11.73x7.09

30.98x24.4x12.6

Weight

Coolant pipe

Liquid

OD(mm) x L(m)

ø6.35 x 5

Coolant

OD(mm) x L(m)

ø12.7 x 5

ø15.8 x 5

Product

Drain hose

ID(mm)x L(m)

ø17 x 2

Compressor

Type

Rotary

Motor

Type

Rated input

1855

2157

Blower

Type

Cross-fan

Propeller

Cross-fan

Propeller

Cross-fan

Propeller

Motor

Type

Resin

Steel

Resin

Steel

Resin

Steel

Rated input

Heat exchanger

2Row 12Step

2Row 24Step

2Row 12Step

2Row 24Step

2Row 12Step

2Row 24Step

Coolant control unit

CAPILLARY TUBE

Freezer oil capacity

600

Coolant to charge(R-22)

1,580

1,180

1,650

Cooling test Condition

INDOOR UNIT

: DB 27°C

WB19°C

INDOORUNIT : DB 27°C WB19.5°C

OUTDOOR UNIT

: DB35°C

WB24°C

OUTDOORUNIT :DB35°C WB24°C

Maximum operation Condition

INDOOR UNIT

: DB 32°C

WB23°C

INDOORUNIT :DB 32°C WB22.5°C

OUTDOOR UNIT

: DB 43°C

WB26°C

OUTDOORUNIT : DB 43°C WB25.5°C

“*” : Tailand Only

Samsung Electronics

2-1

2-2 Dimensions

2-2-1 Indoor Unit

unit : mm

(Remote control unit) (Front view)

Air
in
	1050	63
Air out	180	63	21
			21

		(Installation plate)
		outer edge of
(Rear view)	250	indoor unit	145
	250		145

	260	200	100
2-2-1 Outdoor Unit
(Front view)		(Rear view)
582	340
787
2-2		Samsung Electronics

3. Operating Instructions and Installation

3-1 Operating Instructions

3-1-1 Name & Function of Key in remote controller

NAMED OF KEY

FUNCTION OF KEY

ON/OFF

Use this button to start and stop air conditioner.

ONE SHOT KEY

MODE

Each time you press this button,

ONE SHOT KEY

MODE is changed in the following order.

"AUTO"

"COOL"

"DRY"

"FAN"

CONTINUOUS KEY

TURBO

Use this button to provide heavy duty cooling

ONE SHOT KEY

for 30 minutes.

MILD

Use this button to provide pleasant cooling

ONE SHOT KEY

for 3 hours.

Q. TIMER

Set up the reserve or cancel the timer on and timer off quickly.

ONE SHOT KEY

CONTINUOUS KEY

FAN SPEED

Each time you press this button,

ONE SHOT KEY

FAN SPEED is changed in the following order.

"AUTO"

(L)"

" (ME)"

(HI)"

NATURAL

CONTINUOUS KEY

SET

Adjusts air flow vertically.

ONE SHOT KEY

Each time you press this button,

SWING

BLADE-H rotates by 8° (Changable range 50°).

CONTINUOUS KEY

AUTO

Each time you press this button,

ONE SHOT KEY

BLADE-H rotates within 35° and stop.

TIME

Without regard to ON/OFF condition in remote controller,

ONE SHOT KEY

use this button to set current time.

Adjust the current time using

TIME

button.

(Data can be transmitted after setting up the time)

TIMER/CANCEL

Use this button to reserve or cancel the timer on and timer off.

ONE SHOT KEY

TIMER

Set up the time that operation start.

ONE SHOT KEY

OFF

Set up the time that operation stop.

If the

TIME button is pressed once, the time increase by one

ONE SHOT KEY

(UP)

minute during the time set mode, and ten minutes during the

TIME

timer set mode.

CONTINUOUS KEY

If the TIME

button is pressed once, the time decrease by one

ONE SHOT KEY

(DOWN)

minute during the time set mode, and ten minutes during the

timer set mode.

CONTINUOUS KEY

(UP)

If the

button is pressed once,

the setting temperature is increased by 1°C.

ONE SHOT KEY

TEMP

(DOWN)

If the

button is pressed once,

CONTINUOUS KEY

the setting temperature is decreased by 1°C.

SLEEP

Use this button for sleep operation.

ONE SHOT KEY

(The SLEEP mode can be selected at COOL mode.

Samsung Electronics

3-1

Operating Instructions and Installation

3-1-2 Main controller function.

1.AUTO MODE: In this mode, operation mode (COOL) is selected automatically by the room temperature of initial operation.

Operation Type

Cool Operation (Set Temp:24°C + T)

T= -1°, -2°C, 0°C, +1°C, +2°C

T is controlled by setting temperature up/down key of remote controller

2.COOL MODE: The unit operates according to the difference between the setting and room temperature.

The setting temperature range is 18°Cthrough 30°C.

3.DRY MODE: The unit is operated at compressor on state regardless of room temperature for an initial 30 minutes of dehumidification operation, and the indoor fan motor is automatically operated due to the temperature difference between the room temperature and set temperature.

The compressor is automatically controlled due to the temperature difference between room temperature and set temperature after operation of 30 minutes.

*Set temperature: 18°C~30°C

*Protective function: Low temperature release. (Prevention against freeze)

4.TURBO MODE: This mode is available only in AUTO, COOL mode.

When this button is pressed at first, the air conditioner is operated “powerful” state for 30 minutes regardless of the set 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.

5.MILD MODE: This mode is available only in AUTO, COOL mode.

When this button is pressed at first, the air conditioner is operated in its current state for 3 hours.

The setting temperature is automatically raised by 3°C.

When this button is pressed again or when the operating time is 3 hours, mild operation mode is canceled and returned to the previous mode.

6.SLEEP MODE: Sleep mode is available only in COOL mode.

The operation will stop after 6 hours.

*In COOL mode : The setting temperature is automatically raised by 1°C each 1hour When the temperature has been raised by total of 2°C, that temperature is maintained.

7.FAN SPEED: Manual (3 step), Auto (4 step), Natural

Fan speed automatically varies depending on both the difference between setting and the room temperature.

8.COMPULSORY OPERATION:

For operating the air conditioner without the remote controller.

The operating is the same function that AUTO MODE in the remote controller.

*Set temperature: 22°C

3-2	Samsung Electronics

9.SWING: BLADE-H is rotated vertically by the stepping motor.

*Memory louve: When ON/OFF button is pressed at stop state, the BLADE-H returns to its original location which is operating state before stop.

*Swing auto: The BLADE-H can rotate within about 35° in the original position set by the SWING SET button.

*Swing set: Press the SWING SET button, then the blade rotates vertically by 8°

The BLADE-H location is dispalyed on REMOTE CONTROL. (total 7 steps)

10.Q.TIMER: Q. timer (quick timer) allows reservation or cancel the timer on and timer off quickly.

When Q.timer button is pressed at operating state, LCD displays the polling state sequentially.

The LCD also displays the time remaining.

11.TIMER: The air conditioner is turned ON/OFF at a specified time using TIMER ON/OFF.

*Timer LED lights on.

Operating Instructions and Installation

12.SELF TEST

*Interruption of electric power and Power on.

*Abnormal condition of the room sensor.

*Indoor unit fan motor lock.

*Abnormal condition of the indoor unit's heat exchanger sensor.

13.TIME SHORTENING: If the "Time short" connector pin is shorted on the main P. C. B, the compressor's three minutes delay function is cancelled, and each operation time is shortened to one fiftieth of its original time.

14.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".

Samsung Electronics

3-3

3-2 Installation

3-2-1 Selecting Area for Installation

Select an area for installation that is suitable to the customer's needs.

3-2-1(a) Indoor Unit

1.Make sure that you install the indoor unit in an area providing good ventilation. It must not be blocked by an obstacle affecting the airflow near the air inlet and the air outlet.

2.Make sure that you install the indoor unit in an area allowing good air handling and endurance of vibration of the indoor unit.

3.Make sure that you install the indoor unit in an area where there is no source of heat or vapor nearby.

4.Make sure that you install the indoor unit in an area from which hot or cool air is spread evenly in a room.

5.Make sure that you install the indoor unit in an area away from TVs, audio units, cordless phones, fluorescent lighting fixtures and other electrical appliances (at least 1 meter).

6.Make sure that you install the indoor unit in an area which provides easy pipe connection with the outdoor unit, and easy drainage for condensed water.

7.Make sure that you install the indoor unit in an area which is large enough to accomodate the measurements shown in figure on the next page.

3-2-1(b) Outdoor Unit

1.Make sure that you install the outdoor unit in area not exposed to the rain or direct sun light.

(Install a separate sunblind if exposed to direct sun light.)

2.Make sure that you install the outdoor unit in area allowing good air moment, not amplifying noise or vibration, especially to avoid disturbing neighbours.

(Fix the unit firmly if it is mounted in a high place.)

3.Make sure that you install the outdoor unit in area providing good ventilation and which is not dusty. It must not be blocked by any obstacle affecting the airflow near the air inlet and the air outlet.

4.Make sure that you install the outdoor unit in area free from animals or plants.

5.Make sure that you install the outdoor unit in area not blocking the traffic.

6.Make sure that you install the outdoor unit in area easy to drain condensed water from the indoor unit.

7.Make sure that you install the outdoor unit in area which provides easy connection within the maximum allowable length of a coolant pipe (10 meters).

Note

1.Add 10 grams of refrigerant (R-22) for every 1 meter if the pipe length exceeds the standard pipe length of 5 meters.

2.Maintain a height between the indoor and outdoor units of less than 3 meters.

8.Make sure that you install the outdoor unit in an area which is large enough to accommodate the measurements

shown in figure on the next page.

3-2-1(c) Remote Control Unit

1.Make sure that you install the remote control unit in an area free from obstacles such as curtains etc, which may block signals from the remote control unit.

2.Make sure that you install the remote control unit in an area not exposed to

direct sunlight, and where there is no source of heat.

3.Make sure that you install the remote control unit in an area away from TVs, audio units, cordless phones, fluorescent lighting fixtures and other electrical appliances (at least 1 meter).

Caution :

It is harmful to the air conditioner if it is used in the following environments: greasy areas (including areas near machines), salty areas such as coast areas, areas where sulfuric gas is present such as hot spring areas. Contact your dealer for advice.

3-4	Samsung Electronics

Operating Instructions and

3-2-2 Installation diagram of indoor unit and outdoor unit

GAS LEAK TEST

Indoor unit check points

Outdoor unit check points

*Check for gas leak from the flare nut connections with leak detector.

Slope of drain hose	* Piping may be laid to the rear, left,			right or down.
Avoid up
slopes
	Right			Left
	Rear	Down	Left rear

350mm or more

250mm

minimum

Insulation of pipe connection area

*Perform gas leakage test first, and insulate the pipe connection area.

Use an insulation tube for insulation as shown in figure.

5 6

	The insulation
	tube shall be	Insulation
	properly finished	Insulation
	properly finished	tube
	not to allow	tube
	any gap.	Vinyl tape
		Vinyl tape
		(purchase locally)

Remote control

Remote control holder

Hole dimension of bolts for the outdoor unit

ø12

582

Fix firmly if installed in an area affected by typhoons.

Coolant adjustment procedure

Class	At installation		At installation
Connection	Air-purge	Coolant	Air purge	Refrigerant
pipe lengh	method	adjustment	method	quantity
5m max	Refer to the	unnecessary	Purge air	See table
5m max	Refer to the		Purge air	right.
	detailed		using	right.
	detailed		using
	air-purge		a vacuum
	procedure.		pump or an
		Add 10g of	additional	Add 10g of
		coolant	coolant	coolant
5~10m		<R-22> for	cylinder.	<R-22> for
		every 1m.		every 1m.
		(Refer to		(Refer to
		the detailed		the detailed
		coolant		coolant
		charge		charge
		procedure.)		procedure.)

		kg . cm
Coolant adjustment procedure

Outer diameter	Fixing torque	Final torque
ø6.35mm	160	200
ø12.7mm	500	550

ø15.8mm	700	750

Tighten the flare nut by hand first, and tighten firmly with a spanner

Samsung Electronics

3-5

Operating Instructions and Installation

3-2-2(a) Fixing the Installation Plate

CUTTING A HOLE

When the refrigerant piping are hooked up from the rear.

Installation plate

Pipe hole (ø65mm)

Determine the pipe hole position for installation and drill the pipe hole (65mm inner diameter) so that it slants slightly downward.

MOUNTING THE INSTALLATION PLATE

When the installation plate is directly mounted on the wall.

250mm	145mm
350mm	250mm
Installation plate	Weight
260mm Indoor unit	200mm 100mm
Pipe hole
(ø65mm)

Mounting at the window frame.

Screw wood

Wood pillar

1.Install the installation plate horizontally on structural members (studs, etc.) in the wall.

2.To mount the installation plate on a concrete wall with anchor bolts, utilize the anchor bolt holes as illustrated in the left figure.

3.When the anchor bolts are already driven in the wall, also utilize the anchor bolts holes to secure the installation plate. (If an anchor bolt is too long, adjust the projecting length to 20mm or less.)

1.As the left Fig.

Fix the wood pillar at the wood frame and install installation plate with screw tap.

2.Fix the wood pillar with enough strength to bear the weight of the indoor unit.

3-6	Samsung Electronics

Assembly cable

3-2-2(b) Wiring connection(Indoor unit)

1.Open the Grille and remove the screw securing the cover.

2.AS-18**: Pass the assembly cable through the rear of the indoor unit and connect the assembly cable to terminals 1~3.

*Each wire is labelled with the corresponding terminal number. AS-24**: Firmly connet the cable connector with connector.(6pin, 4-cable)

3.Assembly every parts by contrary order to disassembly.

Operating Instructions and Installation

AS-24**

Conneitor

AS-18**

Indoor unit

Outdoor

unit

Screw

3-2-2(c) Piping and drain hose installation

1. Fix the drain hose right the refrigerant piping.	Piping

2.Be careful not to form a slack of the drain hose.

3.Do not allow the piping to jut out from the back of the indoor unit.

4.Insulate both of the refrigerant pipings so that dewing and troubles may not happen.

5. Be careful in bending the pipes. The bending radius must be 100mm or larger.

Tape

Drain hose

A.Right-hand connection with piping

1.Cut out the knock-out piece from the rightside of the rear body with a knife, etc. Smooth the cut edges.

2.Cut out the Holder-pipe slit part.

3.Support the above section to be bent with your hand and bend the pipes there.

B.Left-hand connection with piping		C.Under-side connection with piping
1. Cut out the knock-out piece from the	1.	Cut out the knock-out piece from the
leftside of the rear body with a knife,		underside of the rear body with a knife,
etc. Smooth the cut edges.		etc. Smooth the cut edges.
	2. Cut out the Holder-pipe on its slit part.

Set the drain hose in the inner part of the

indoor unit and the assembly cable in lower part of it. Wind tape round them.

C B

Piping

Assembly cable

Installation plate

Drain hose

Samsung Electronics

3-7

Hook here

Operating Instructions and Installation

3-2-2(d) Indoor unit installation

1. Pass the pipes through the hole in the wall and hook the indoor unit to the installation plate at the upper and lower hooks.

2.Move the indoor unit to the right and left to make sure that the unit is securely hooked on to the installation plate.

DRAINAGE

1.Run the drain hose sloped downward.

2.Do not install the drain hose as illustrated below.

				Ditch
Do not form	Do not put the	Do not wave	Keep a distance	Do not put the
a rise	drain hose end	the hose	at least 5cm	drain hose end
	into water		or more	in the ditch

3.Put water in the drain pan and make sure that the water is drained outdoor.

4.When connecting the extension drain hose, insulate the inside part of the extension drain hose with shield.

3-2-2(e) Wiring connection(outdoor unit)

AUXILIARY POWER S/W

Auxiliary power S/W should be installed near indoor unit so that each access is possible.

Main/Outdoor unit power cords are connected to upper/lower terminal of auxiliary power S/W.

distributind board

Auxiliary power S/W

WIRING CONNECTION

Indoor unit connector wire should be connected to both indoor unit connector (terminal board) and outdoor unit terminal board as shown in the figure below.

AS-18**

EARTH WIRE

(POWER CABLE)

(ASSEMBLY CABLE)

EARTH WIRE

AS-24**
		EARTH WIRE
	(ASSEMBLY CABLE)
	(POWER CABLE)	EARTH WIRE
		EARTH WIRE
<Indoor unit>	<Outdoor unit>

3-8	Samsung Electronics

Operating Instructions and Installation

3-2-2(f) Grounding

(The Parts for this work are optional.)

•A grounding terminal can be found on the outdoor unit as illustrated.

1. When an existing grounding terminal is avilable. (Grounding wire of ø1.6mm or larger<solid wire>or

2mm2 or larger <standard wire>)

Terminal used exclusively for grounding.

Grounding resistance ; Less than 100 ohms

(existing grounding electrode)

2. Use of a grounding electrode.

• Specifications of grounding electrode.

Carbon plastic	Steel core
PVC-Insulated(2mm2x3.5m), green	Terminal, M4

No.

JOB

EXPLANATION

PRECAUTIONS

Determine the

• Suitable location

•

Avoid sandy or gravelly soil as its grounding

grounding position.

a) Place that is always dank.

resistance is high.

b) Hard soil rather than loose sandy soil.

•

The grounding wire for the telephone line cannot

be used for the grounding of the air conditioner.

• Unsuitable location

•

When the grounding electrode is to be installed

a) Where there are underground structures or

under a place with heavy traffic, its wire must be

facilites such as gas pipes, water pipes,

connected firmly with the utmost care.

telephone lines, underground cables, etc.

b) A place 2m or less from the lightning arrester

grounding electrode and its cable.

Drive the grounding

a) Dig a hole to the size illustrated,

electrode into position.

and drive in the grounding electrode.

b) Cover the top of the grounding

electrode with excavated soil.

Put the grounding

a) If the grounding wire is too short, connect an

•

The grounding wire should be a green

wire in order.

extention lead to it. Solder the joint and

insulated wire of ø1.6mm or 2mm 2 or larger.

wrap it with tape.

•

The soldered joint should not be buried

b) Fasten the grounding wire with staples.

underground.

Check the

a) After grounding work, measure the grounding

workmanship,

resistance with a grounding resistance tester.

and provide

corrective

b) If the resistance is above a specified level,

measures if

drive the grounding electrode in deeper

necessary.

or increase the number of grounding

electrodes.

Connect the

Secure the grounding wire to the

grounding

grounding terminal of the air conditioner

wire to the air

conditioner.

Samsung Electronics

3-9

Operating Instructions and Installation

3-2-2(g) Flare modification

• Tools used

Clamp handle

Tightening

knob

Bar

Yoke

Cutting wheel

Roller	Cone

• Flare modification procedure

1) Cut the pipe using a pipe cutter.		2) Remove burrs at the tip of the pipe cut.
		Caution : Burrs not removed may result
		in leakage of gas.
Oblique Raughness	Burr	Pipe
		Reamer
		Point
		down

3) Insert a flare nut into the pipe and modifty flare.

D
A	Outer diameter	A(mm)
	Outer diameter	A(mm)
	ø6.35mm	1.3
	ø12.7mm	2.0
	ø15.8mm	2.2
• Unproper flaring

Inclined	Surface	Cracked	Uneven
	damaged		thickness

3-10	Samsung Electronics

3-2-2(h) Air-Purge Procedure

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

2Connect the charging hose of low pressure side of manifold gauge to the packed valve having a service port (3/8” or 1/2” Packed valve) as shown at the figure.

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

4.Purge the air from the system using vacuum pump for about 10 minutes.

-Close the valve of the low pressure side of manifold gauge clockwise.

-Remove the hose of the low pressure side of manifold gauge.

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.

Operating Instructions and Installation

Outdoor unit	Indoor unit
Outdoor unit
	Gas pipe side
	Liquid pipe side

Vacuum Pump

B	A
(liquid)	(gas)

Valve stem

Stem cap

Samsung Electronics

3-11

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