SAMSUNG AM18A1E2 Service Manual

ROOM AIR CONDITIONER

INDOOR UNIT
AM18A1(B1)E09
AM18A1(B1)B09
AM19A1(B1)E07
AM19A1(B1)B12

SERVICE

OUTDOOR UNIT
UM18A1(B1)E2
UM18A1(B1)B2
UM19A1(B1)E2

Manual

CONTENTSAIR CONDITIONER

1. Pre c a u t i o n s

2. Product Specifications

3. Operating Instructions and

I n s t a l l a t i o n

4. Disassembly and Reassembly

5. Tro u b l e s h o o t i n g

6. Exploded Views and Parts List

7. Block Diagrams

8. PCB Diagrams

9. Wiring Diagrams

10. Schematic Diagrams

© Samsung Electronics Co., Ltd. DEC. 1998.

Printed in Korea.
Code No. DB81-10176A(2)

1. Precautions

1 . Warning: Prior to re p a i r, disconnect the

power cord from the circuit bre a k e r.

2 . Use proper parts: Use only exact re p l a c e m e n t

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 re p a i r, check the power

c o rd 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 re a s s e m b l y,

check the insulation resistance. Pro c e d u re :
Prior to applying power, measure the re s i s­tance between the power cord and the gro u n d
terminal. The resistance must be greater than
30 megohms.

Fig. 1-1 Avoid Dangerous Contact

Fig. 1-2 No Tapping and No Extension Cords

7 . Make sure that the grounds are adequate.

8 . Make sure that the installation conditions are

s a t i s f a c t o r y. Relocate the unit if necessary.

9 . Keep children away from the unit while it is

being re p a i re d .

1 0 . Be sure to clean the unit and its surro u n d i n g

a re a .

Fig. 1-3 No Kids Nearby!

Fig. 1-4 Clean the Unit

Samsung Electronics

1-1

M E M O

1-2

Samsung Electronics

2. Product Specifications

2-1 Table

Model AM18A1(B1)E2 AM18A1(B1)B2 AM19A1(B1)E2

INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
Item AM18A1(B1)E09 UM18A1(B1)E2 AM18A1(B1)B09 UM18A1(B1)B2 AM19A1(B1)E07 AM19A1(B1)E12 UM19A1(B1)E2
Type - Wall-Mounting Multi Split Wall-Mounting Multi Split

Cooling BTU/h 9,000 18,000(9,000x2) 9,000 18,000(9,000x2) 7,000 12,000 19,000 (7,000+12,000)
Dehumiditying I/h 1.6 - 1.6 - 1.2 1.9 -

Perfor­mance

Power

Size

Air volume Cooling m3/min 7.0 - 7.0 - 6.0 8.3 ­Noise Cooling dB 35 54 35 54 33 38 54
Power V-Hz 1-220-240V~, 50Hz 1-220V~, 60Hz 1-220V~, 50Hz
Power consumption
Operating current Cooling A 3.7 7.4(3.7x2) 4.0 8.0(4.0x2) 3.1 5.3 8.0
Power factor Cooling % 97.9 97.7 96.0 96.0 94.0
Starting current A 30 30

Power cord(Option)
Fuse capacity A 3.15 - 3.15 - 3.15 3.15 3.15 / 5

Outer
dimension

Weight kg 9.6 53 9.6 53

Refrigerant pipe
Drain hose ID(mm) x L(m) ø17 x 2,000 ø17x2,000

Comp­ressor

Blower

Heat exchanger 2Row 12Step 2Row 24Step 2Row 12Step 2Row 24Step 2Row 12Step 2Row 12Step 2Row 24Step
Refrigerant control unit A,B-UNIT ; Capillary Tube A,B-UNIT ; Capillary Tube.
Freezer oil capacity cc - 280 - 280 280 360 ­Refrigerant to change (R-22) g - 800x2 - 790x2 700 850 700 + 850
Protection device ­Standard Conditions ISO R5151 Standard ARI Standard ISO R5151 Standard

Cooling W 870 1,740(870x2) 860x2 1,720(860x2) 720 1,230 1,820

- HO7RNF 2.5 - H07RNF2.5 - - H07RNF2.5
HO5RNF (5G 1mm2) HO5RNF (5G 1mm2) H05RNF (5G 1mm2)

W x H x D

Liquid
GAS

Type - Rotary - Rotary Rotary Rotary Rotary
Model name - 44B092JW1E6 - 44B092IW1E5 44A070JW1E1 48A124JV1E5 44A070JW1E1 + 48A124JV1E5
Capacitor - 30µF x 420VAC - 20µF x 450VAC 25µF x 450VAC 30µF x 420VAC 20µF x 450VAC + 30µF x 420VAC

Tape(model) - - - - - - -

Motor

Rated output W - 675 - 675 675 1,210 -

Type Cross-fan Propeller Cross-fan Propeller Cross-fan Cross-fan Propeller

Type Resin Still Resin Still Resin Resin Still

Motor

Rated output W 35 35 35 35 35 35 35

mm 815x298x182 787x620x320 815x298x182 787x620x320 815x298x182 815x298x182 787x620x320

inch

OD(mm)xL(m)

32.08x11.73x7.17 30.98x24.41x12.6 32.08x11.73x7.17 30.98x24.41x12.6

ø6.35 x 5 ø6.35 x 5 ø6.35x5 ø6.35x5 -

ø9.52x5 ø9.52 x 5 ø9.52x5 ø12.7x5 -

MRA12037-12007

-

MRA12032-12008 MST24AMN-12008 MRA12030-12008 -

32.08x11.73x7.17 32.08x11.73x7.17 30.98x24.41x12.6

9.6 9.6 53

•The basic performance test is based on the piping of 5MT. (Be sure to check the installing conditions as extension of the piping
may lead to performance degradetion.)

Samsung Electronics

2-1

2-2 Dimensions

2-2-1 Indoor Unit

Air
in

Air out

2-2-1 Outdoor Unit

(Front view)

(Rear view)

815 182

(Remote control)

58

22

Installation plate

2-2

(Front view)

(Rear view)

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2-3 Refrigerating Cycle Block Diagram

INDOOR UNIT

(A) (B)

Heat
exchanger
(Evaporator)

T1

Liquid side

T2 Gas side

2-way valve

3-way valve

OUTDOOR UNIT

Capillary tube

Compressor-A

Heat
exchanger
(Condenser)

Cooling
Gas leak

check point

Refrigerating cycle temperature and pressure

STD Pressure Piping Temp.(°C) Temp. Condition (°C)

Operating Condition (kg/cm2G)

3-way valve DB WB DB WB

Standard 5.0~5.2 11 11 27 19 35 24

A or B Max over load 6.0~6.3 16 15 32 23 43 26

Cooling Low temp. 3.4~3.6 3 2 21 15 21 15

Standard 5.0~5.2 12 10 27 19 35 24

A + B Max over load 6.0~6.3 16 15 32 23 43 26

Low temp. 3.4~3.6 3 2 21 15 21 15

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T1 T2

Indoor Outdoor

2-3

M E M O

2-4

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3. Operating Instructions and Installation

3-1 Operating Instructions

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

NO

1
2

3

4
5

6

7

8

NAMED OF KEY

MODE

TURBO

OFF

(UP)

(DOWN)

FUNCTION OF KEY
On/Off Button. Use this button to start and stop air conditioner.
Temp. up button. If the button is pressed once,

the setting temperature is increased by 1°C
Temp. down button. If the button is pressed once,

the setting temperature is decreased by 1°C
Each time you press this button,

MODE is changed in the following order.

Use this button to provide heavy duty cooling & Heating for 30 minutes.
Set up the reserve or cancel the timer on and timer off quickly

Use this button for sleep operation.
(The SLEEP mode can be selected at COOL and HEAT mode.)

Adjusts air flow vertically.
Each time you press this button,

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

9

C

O

10

V
E
R

11
12
13

14

15

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T

I

M

E
R

ON TIMER
OFF TIMER

SET
CANCEL

TIME

(UP)

(DOWN)

Set up the time that operation start.
Set up the time that operation stop.

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

If the button is pressed once, the time increase by one minute
during the time set mode, and ten minutes during the timer set mode.

If the button is pressed once, the time decrease by one minute
during the time set mode, and ten minutes during the timer set mode.

Without regard to ON/OFF condition in remote controller,
use this button to set current time.
Adjust the current time using button.
(Data can be transmitted after setting up the time)

3-1

Operating Instructions and Installation

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

1. A U TO MODE : In this mode, operation
C O O L mode is selected automatically by the
room temperature of initial operation.

Operation Type

Tr≥ 24.5°C+∆T Compressor ON

Cool Operation

Tr≤ 24°C+∆T Compressor OFF

∆T= -1°, -2°C, 0°C+1°C+2°C
∆T is controlled by setting temperature

up/down key of remote contro l l e r

* FAN SPEED : A U TO

2. C O O L MODE : The unit operates accord i n g
to the diff e rence between the setting and
room temperature. (18°C~30°C)

3. D RY MODE : Has 3 states, each determined
by room temperature .
The unit operates in DRY m o d e .
*Co m p ressor ON/OFF Time is contro l l e d
compulsorily(can not set up the fan speed,
always bre e z e ) .
* P rotective function : Low temperature
release. (Prevention against fre e z e )

Room Temp

4. TURBO MODE : This mode is available in
A U TO, COOL, DRY, FAN MODE.
When this button is pressed at first, the air
conditioner is operated “powerful” state for
30 minutes re g a rdless of the set tempera­t u re, 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 A U TO
mode automatically.

5 . S L E E P MODE : Sleep mode is available

only in COOL m o d e .
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 main­t a i n e d .

6. FAN SPEED : Manual (3 step), Auto (4 step)
Fan speed automatically varies depending
on both the diff e rence between setting and
the room temperature .

3-2

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Operating Instructions and Installation

7 . C O M P U L S O RY O P E R ATION :

For operating the air conditioner without
the remote contro l l e r.
* A U TO : The operating is the same func­tion that A U TO MODE in the remote con­t ro l l e r.

8 . SWING : BLADE-H is rotated vertically by

the stepping motor.

9 . Quick OFF TIMER: OFF timer (quick timer)

allows reservation or cancel the timer on
and timer off quickly
When OFF timer button is pressed at oper­ating state, LCD displays the polling state
s e q u e n t i a l l y.
The LCD also displays the time re m a i n i n g .

1 0 . 24-Hour ON/OFF Real Setting Ti m e r. : The

air conditioner is turned ON at a specified
time using .

ON TIMER

OFF TIMER : The air Conditioner is turned
OFF at a specified time using .

OFF TIMER

*ON TIMER : Only timer LED lights on.
*OFF TIMER : Both timer and operation
LED lights on.
*3 minutes delay timer.

11 . SELF Diagnosis

LED DISPLAY

o p e r-

T I M E R

a t i o n

FA N

Tu r b o

Check Point

I n t e r ruption of electric power and Power on.
Abnormal condition of the room sensor.
Abnormal condition of the indoor unit's heat exchanger sensor.

Indoor unit fan motor lock.

L E D

:

b l i n k i n g

: LED off

1 2 . 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"

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3-3

3-2 Outdoor unit controlling spec (Each load controlling condition)

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 spre a d
evenly in a ro o m .

5 . Make sure that you install the indoor unit in

an area away from TVs, audio units, cord­less phones, fluorescent lighting fixture s
and other electrical appliances (at least 1
m e t e r ) .

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
l i g h t .

(Install a separate sunblind if exposed to

d i rect 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 traff i c .

6. Make sure that you install the outdoor unit
in area easy to drain condensed water fro m
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 (15 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 con-

t rol unit in an area free from obstacles such
as curtains etc, which may block signals
f rom the remote control unit.

2. Make sure that you install the remote con­t rol unit in an area not exposed to
d i rect sunlight, and where there is no sourc e
of heat.

3. Make sure that you install the remote con­t rol unit in an area away from TVs, audio
units, cordless phones, fluorescent lighting
f i x t u res 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

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

Operating Instructions and Installation

A Indoor unit gas leak test check point

Indoor unit

Piping

1

3

2

Tape vinyl

B Drain hose installation

Cut the piping hole
sloped slightly

250mm
or more

Piping may be laid to the rear, left,
right or down.

Right

Rear

Down

A

B

Left

Rear

200mm or more

7 8 9

5 6

Remote control

Remote control holder

4

A-UNIT

B-UNIT

1
2
3
4
5

Piping (Liquid) 1/4" Clamper tube
Piping (Gas) 3/8" or 1/2" Installation plate
Installation tube Pipe-connection
Vinyl tape Screw
Putty Drain hose

6
7
8

9

10

Outdoor unit check point.

1 0

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3-5

Operating Instructions and Installation

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

(Unit : mm)

(Unit : mm)

Installation plate

280

340

Pipe hole
(ø65mm)

1. Determine the position of the pipe and drain hose hole
using the right figure and drill the hole with an inner
diameter of 65mm so that it slants slightly downwards.

2. If you are fixing the indoor unit to a… Then follow Steps…

Wall 3.

Window frame 4 to 6.

3. Fix the installation plate to the wall in a manner appro­priate to the weight of the indoor unit.

If you are mounting the plate on a concrete wall with
anchor bolts, the anchor bolts must not project by more
than 20mm.

4. Determine the positions of the wooden uprights to be
attached to the window frame.

3-2-2(b) Purging the Unit

5. Attach the wooden uprights to the window frame in a
manner appropriate to the weight of the indoor unit.

6. Using tapped screws, attach the installation plate to the
wooden uprights, as illustrated in the last figure oppo­site.

On delivery, the indoor unit is loaded with an inert gas.
All this gas must therefore be purged before connecting the
assembly piping. To purge the inert gas, proceed as fol ­lows.

Unscrew the caps at the end of each pipe.

Result : All inert gas escapes from the indoor unit.

• To prevent dirt or foreign objects from getting into

the pipes during installation, do NOT remove the
caps completely until you are ready to connect the
piping.

3-6

Samsung Electronics

3-2-2(c) Connecting the Assembly Cable.

The outdoor unit is powered from the indoor unit via the assembly
cable. If the outdoor unit is more than five metres away from the
indoor unit, the cable must first be extended to a maximum of
ten metre s .

1 . Extend the assembly cable if necessary.
2 . Open the front grille by pulling on the tabs on the lower right and

left sides of the indoor unit.
3 . Remove the screw securing the connector cover.
4 . Pass the assembly cable through the rear of the indoor unit and

connect the assembly cable to terminals 1 to 5.

• Each wire is labelled with the corresponding terminal number.
5 . Pass the other end of the cable through the 65mm hole in the wall.
6 . Replace the connector cover, carefully tightening the scre w.
7 . Close the front grille.
8 . For further details on how to plug the other end of the assembly

cable into the outdoor unit, refer to page 3-10.

Operating Instructions and Installation

3-2-2(d) Installing and Connecting the Indoor Unit Drain Hose

C a re must be taken when installing the drain hose for the indoor unit to ensure that any condensa ­tion water is correctly drained outside.l When passing the drain hose through the 65mm hole drilled
in the wall, check that none of the following situations occur.

The hose must
NOT slope upw
ards.

To install the drain hose, proceed as follows.

1. If necessary, connect the 2-metre extension to the drain hose.
2 . If you are using the extension, insulate the inside part of the extension drain hose with a shield.

3. Pass the drain hose under the refrigerant piping, taking care to keep the drain hose tight.

4. Pass the drain hose through the hole in the wall, making sure that it is sloping downwards, as
shown in the illustrations above.

The end of the drain
hose must NOT be
placed in water.

Do NOT bend the
hose in different
directions.

Keep a clearance of at
least 5cm between the
end of the hose and the
ground.

Do NOT place the end
of the drain hose in a
hollow.

Shield

Drain hose Extension drain hose

Samsung Electronics

The hose will be fixed permanently into position once
the whole installation has been tested for gas leaks;
refer to page 16 for further details.

3-7

Operating Instructions and Installation

3-2-2(e) Outdoor unit installation

GAS LEAK TEST

Indoor unit check point

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

WIRING CONNECTION

Two electric cables must be connected to the outdoor unit:

• The assembly cable connecting the indoor unit to the outdoor unit.

• The power cable connecting the auxiliary circuit breaker to the outdoor unit.

1 Remove the terminal board cover on the side of the outdoor unit.

Outdoor unit check point

Outdoor unit

2 Connect the assembly cable to terminals 1 to 5 and connect the power cable to therminals A to B.

Each wire is labelled with the corresponding terminal number.
E n s u re that the wire number of the indoor unit and the terminal number of the out­door unit.

3 Connect the earthing wires to the earth terminals.

Refer to the page opposite for further details on how to check that earthing is cor­re c t .

4 Replace the terminal board cover, carefully tightening the screw.
5 connect the power cable to the auxiliary circuit breaker.

Indoor unit

FAN

4

3

COMP

2

(N)

Earth
terminal

Earth
terminal

1

(L)

3

COMP

FAN

4

1(L) 2(N)

Terminal Block

Circuit Breaker
(Main Power supply cable)

Earth
terminal

Earth
terminal

Assembly cable

Earth
terminal

3-8

Indoor unit

A-unit

B-unit

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