Samsung MC18AC2-09 User manual

SERVICE Manual

ROOM AIR CONDITIONER

INDOOR UNIT

MC18AC2-09

MC19AC2-07

MC19AC2-12

MC24AC2-12

OUTDOOR UNIT

MC18AC2X

MC19AC2X

MC24AC2X

CONTENTSAIR CONDITIONER

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

DB98_06187A(2)_cover 2/19/03 2:51 PM Page 3

1-1Samsung Electronics

1. Warning: Prior to repair, disconnect the power

cord from the circuit breaker.

2. Use proper parts: Use only exact replacement

parts. (Also, we recommend replacing parts

rather than repairing them.)

3. Use the proper tools: Use the proper tools and

test equipment, and know how to use them.

Using defective tools or test equipment may

cause problems later-intermittent contact, for

example.

4. Power Cord: Prior to repair, check the power

cord and replace it if necessary.

5. Avoid using an extension cord, and avoid tap-

ping into a power cord. This practice may

result in malfunction or fire.

6. After completing repairs and reassembly, check

the insulation resistance.

Procedure: Prior to applying power, measure

the resistance between the power cord and the

ground terminal. The resistance must be

greater than 30 megaohms.

7. Make sure that the grounds are adequate.

8. Make sure that the installation conditions are

satisfactory.

Relocate the unit if necessary.

9. Keep children away from the unit while it is

being repaired.

10. Be sure to clean the unit and its surrounding

area.

1. Precautions

Fig. 1-1 Avoid Dangerous Contact

Fig. 1-2 No Tapping and No Extension Cords

Fig. 1-3 No Kids Nearby!

Fig. 1-4 Clean the Unit

DB98_06187A(2)_1 2/19/03 2:50 PM Page 1-1

MEMO

Samsung Electronics1-2

DB98_06187A(2)_1 2/19/03 2:50 PM Page 1-2

2-1Samsung Electronics

2. Product Specifications

2-1 Table

Cooling BTU/h

Kcal/h

Dehumidifying \/h

Air volume m

/min

Noise dB

Power ø-V-Hz

Power Consumption W

Operating Current A

Starting Current A

Power Cord (Option)

Connection Cable (Option)

Fuse Capacity A

Outer mm

Dimension W x H x D inch

Weight kg

Refrigerant pipe Liquid

OD(mm)xL(m)

Gas

OD(mm)xL(m)

Drain hose

OD(mm)xL(m)

Type

Model name

Compressor Capacitor

Motor Type

Rated output W

Type

Blower Motor Type

Rated output W

Heat exchange

Refrigerant control unit

Freezer oil capacity cc

Refrigerant to charge(R410A)

Protection device

Cooling test condition

Maximum operation condition

Model

Item

INDOOR UNIT

MC18AC2-09

OUTDOOR UNT

MC18AC2X

INDOOR UNIT

MC19AC2-07

INDOOR UNIT

MC19AC2-12

OUTDOOR UNIT

MC19AC2X

INDOOR UNIT

MC24AC2-12

OUTDOOR UNIT

MC24AC2X

MC18AC2 MC19AC2 MC24AC2

Power

Size

Perfor-

mance

Type

2.65

9,042

2,279

1.2

6.7

940

4.2

3.15

790x245x165

31.1x9.64x6.50

7.7

ø6.35x5

ø9.52x5

ø18.0x2

Resin

Cross-flow

2Row 12Step

5.3

18,084

4,558

1,880

8.4

880x638x310

34.65x25.1x12.2

Rotary

A:G4A097JU1EP

B:G4A097JU1EP

A:35µF 450VAC

B:35µF 450VAC

A:925,B:925

Steel

Propeller

2Row 24Step

A:280

B:280

A:RAC12131-9622

B:RAC12131-9622

2.05

6,995

1,763

0.9

830

3.7

3.15

790x245x165

31.1x9.64x6.50

7.7

ø6.35x5

ø9.52x5

ø18.0x2

Resin

Cross-flw

2Row 12Step

3.5

11,942

3,009

1.5

1,170

5.1

3.15

790x245x165

31.1x9.64x6.50

7.7

ø6.35x5

ø9.52x5

ø18.0x2

Resin

Cross-flow

2Row 12Step

5.55

18,937

4,772

2,000

8.8

880x638x310

34.65x25.1x12.2

Rotary

A:G4A080JU1EP

B:G8C124JU1EL

A:30µF 450VAC

B:35µF 450VAC

A:820, B:1060

Steel

Propeller

2Row 24Step

A:280

B:500

A:RAC12126-9622

B:RAC12128-9622

3.5

11,942

3,009

1.5

1,190

5.2

3.15

790x245x165

31.1x9.64x6.50

7.7

ø6.35x5

ø9.52x5

ø18.0x2

Resin

Cross-flow

2Row 12Step

23,884

6,018

2,380

10.4

1000x798x310

39.37x31.42x12.2

Rotary

A:G8C124JU1EL

B:G8C124JU1EL

A:35µF 450VAC

B:35µF 450VAC

A:1060, B:1060

Steel

Propeller

2Row 36Step

A:500

B:500

A:RAC12128-9622

B:RAC12128-9622

Wall-Mounting Multi Split

1-220-240V~, 50Hz

2.5 x 3core

1.0 x 4core

A/B-Unit:Capillary tube

A-Unit:500g, B-Unit:970g

Indoor unit : DB27˚C WB19˚C Outdoor unit : DB35˚C WB24˚C

Indoor unit : DB32˚C WB23˚C Outdoor unit : DB43˚C WB26˚C

Wall-Mounting Multi Split

1-220-240V~, 50Hz

2.5 x 3core

1.0 x 4core

A/B-Unit:Capillary tube

A-Unit:650g, B-Unit:650g

Wall-Mounting Multi Split

1-220-240V~, 50Hz

2.5 x 3core

1.0 x 4core

A/B-Unit:Capillary tube

A-Unit:850g, B-Unit:850g

DB98_06187A(2)_1 2/19/03 2:50 PM Page 2-1

245

165

790

Air

(Front view)

(Remote control)

Air out

Installation plate

2245

115

Samsung Electronics2-2

2-2 Dimensions

2-2-1 Indoor Unit

(Unit : mm)

DB98_06187A(2)_1 2/19/03 2:50 PM Page 2-2

2-3Samsung Electronics

Product Specifications

(Unit : mm)

2-2-2 Outdoor Unit

(Front view) (Rear view)

660

880 340

638

310

■ MC18AC2X / MC19AC2X

(Unit : mm)

(Front view) (Rear view)

660

1000 340

798

310

■ MC24AC2X

DB98_06187A(2)_1 2/19/03 2:50 PM Page 2-3

Samsung Electronics2-4

2-3 Pressure Graph

20 30

Outdoor drybulb temperature [deg C]

Low Pressure [kg/cm2G]

30.6/22.5

27/19

21.5/14.6

■MC19AC2-07

■

20 30

Outdoor drybulb temperature [deg C]

Low Pressure [kg/cm2G]

30.6/22.5

27/19

21.5/14.6

■MC18AC2-09

■

20 30

Outdoor drybulb temperature [deg C]

Low Pressure [kg/cm2G]

30.6/22.5

27/19

21.5/14.6

■MC19AC2-12 / MC24AC2-12

■

DB98_06187A(2)_1 2/19/03 2:50 PM Page 2-4

3-1Samsung Electronics

3. Operating Instructions and Installation

3-1 Operating Instructions

Each time you press this button

Mode is changed in the following order

Temp. down button. To decrease the temperature by the pressing

the temperature button.

Temp. up button. To increase the temperature by the pressing

the temperature button.

FUNCTION OF KEY

3-1-1 The Feature of Key in remote controller

: Auto Mode : Dry Mode

: Cool Mode : Fan Only

(DOWN)

Power On/Off button to start and stop airconditioner or timer set up.

NAMED OF KEY

(UP)

Adjust air flow vertically.

Press until the appearance. The sleep timer can be used when

you are cooling your room to switch the air conditioner off

automatically after a period of six hours.

The Off Timer enables you to switch off the air conditioner automatically

after a given period of time that is from 30 minutes to 24 hours.

To cancel the Off Time, press the (Set/Cancel) button.

The ON Timer enables you to switch on the air conditioner automatically

after a given period of time that is from 30 minutes to 24 hours.

To cancel the On Time, press the (Set/Cancel) button.

To select the 5 way function with the remote control, press the 5 way

button one or more times until the desired mode is selected.

Each time you press the 5 way button.

Each 5 way indicator on the indoor unit comes on in order.

Each time you press this button,

FAN SPEED is changed in the following order.

Press until the appearance. The air condition cools

the room as quickly as possible. After 30minutes, the air,

the airconditioner is reset automatically to the previous mode.

DB98_06187A(2)_1 2/19/03 2:50 PM Page 2-5

Operating Instructions and Installation

Samsung Electronics3-2

1. AUTO MODE : In this mode, operation

COOL mode is selected automatically by

the room temperature of initial operation.

∆T= -1°C, -2°C, 0°C+1°C+2°C

∆T is controlled by setting temperature

up/down key of remote controller

* FAN SPEED : AUTO

2. COOL MODE : The unit operates

according to the difference between the

setting and room temperature.

(18°C~30°C)

3. DRY MODE : Has 3 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 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.

*But, if you pressed the TURBO button in

DRY or FAN mode that is changed with

AUTO mode automatically.

5. SLEEP MODE : Sleep mode is available

only in COOL mode.

The operation will stop after 6 hours.

*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.

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

Fan speed automatically varies depending

on both the difference between setting and

the room temperature.

7. COMPULSORY OPERATION :

For operating the air conditioner without

the remote controller.

*AUTO : The operating is the same

function that AUTO MODE in the remote

controller. And each time you press the

button the 5WAY function is changed as

follow. STD ➝ NATURE ➝ POWER ➝

SAVING ➝ SILENCE ➝ POWER OFF

❊ STD(standard)( ) : General opera-

tion Mode

❊ NATURE( ) : The unit is operated

according to health

pattern control

❊ POWER( ) : The unit is operated in

powerful state

❊ SAVING( ) : The unit is operated in

power saving state

❊ SILENCE( ) : The unit is operated

quietly

Each mode has Auto, Cool and SLEEP

operation designed in advance.

Operation Type

Cool Operation

Room Temp

Tr≥25°C+∆T

Tr<24°C+∆T

Compressor ON

Compressor OFF

3-1-2 Name & Function of Key in remote controller

DB98_06187A(2)_1 2/19/03 2:50 PM Page 2-6

3-3Samsung Electronics

Operating Instructions and Installation

8. SWING : BLADE-H is rotated vertically by

the stepping motor.

*Memory louver : When ON/OFF button

is pressed at stop state, the BLADE-H

returns to its original location which is

operating state before stop

*Swing 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. 24-Hour ON/OFF Real Setting Timer. :

The air conditioner is turned ON at a

specified time using .

OFF TIMER : The air Conditioner is

turned OFF at a specified time using .

*ON TIMER : Only timer LED lights on.

*OFF TIMER : Both timer and operation

LED lights on.

10. SELF Diagnosis

11. 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".

Indoor unit room temperature sensor

error(open or short)

Check Point

LED DISPLAY

TIMER

NATURE

STD

POWER SAVING SILENCE

: LED blinking : LED off

Indoor unit heat exchanger temperature

sensor error(open or short)

Indoor fan mal function

EEPROM error

Option error(option wasn’t set up or

option data error)

DB98_06187A(2)_1 2/19/03 2:50 PM Page 2-7

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