Samsung AQA07C5ME, AQA09CBME, AQA12CBME, SH07AC5, SH09ACB Service Manual

ROOM AIR CONDITIONER

INDOOR UNIT

AQA07C5(6)ME
AQA09CA(B)ME
AQA12CA(B)ME
SH07AC5(6)
SH09ACA(B)
SH12ACA(B)

SERVICE

OUTDOOR UNIT

UQA07C5(6)ME
UQA09CA(B)ME
UQA12CA(B)ME
SH07AC5(6)X
SH09ACA(B)X
SH12ACA(B)X

Manual

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

1. Precautions

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
tapping 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.

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 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.

Fig. 1-3 No Kids Nearby!

O.K

Fig. 1-4 Clean the Unit

1-1Samsung Electronics

MEMO

Samsung Electronics1-2

2. Product Specifications

2-1 Table

Item

Type

Cooling KW
Dehumidifying
Heating KW
Low temp. heating Btu/h
Air volume Cooling m

Perfor-

mance

Noise Cooling dB

Energy Cooling KW/KW
Efficiency ratio Heating KW/KW
Power Ø-V-Hz
Power Cooling W
Consumption Heating W
Operating Current Cooling A

Power factor Cooling %

Power

Starting current A
Power cord Length m

Fuse capacity A
Outer Width x Height mm
dimension x Depth inch
Weight kg
Refrigerant pipe Liquid OD(mm) x L(m)

Drain hose ID(mm)x L(m)

Size

Compressor Type

Blower Type

Heat exchanger
Refrigerant control unit
Freezer oil capacity
Refrigerant to charge(R-410A)
Protection device

Cooling test condition
Heating test condition
Maximum operation Condition

Heating m

Heating dB

Heating A

Heating %

Number of core wire

Gas OD(mm) x L(m)

Motor Type

Rated output W

Motor Type

Rated output W

Model

\/h

3

/min

3

/min

AQA07C5(6)ME

SH07AC5(6)

Indoor unit Outdoor unit

Wall-mounting

2.30

0.9

2.35

-

5.4 -

5.5 ­35 50
35 50

2.80

3.18

1-220/240-50

820
740

3.7

3.3

97.3

97.3

14.5

-­250V 10/16A

3.15 -

790x245x165 660x494x235

31.10x9.65x6.50

Cross-fan Propeller

Resin Steel

2Row 12Step 1Row 20Step

25.98x19.57x9.25

7.7 27.5
ø6.35 x 5
ø9.52 x 5

ø17 x 2

- Rotary

--

- 849

15 25

Capillary tube

280
560

-

RAC12126

-9622
Indoor unit : DB27˚C WB19˚C Outdoor unit : DB35˚C WB24˚C
Indoor unit : DB20˚C WB15˚C Outdoor unit : DB 7˚C WB 6˚C
Indoor unit : DB32˚C WB23˚C Outdoor unit : DB43˚C WB26˚C

AQA09CA(B)ME

SH09ACA(B)

Indoor unit Outdoor unit

Wall-mounting

2.80

1.1

2.90

-

6.6 -

7.0 ­38 51
38 51

2.83

3.09

1-220/240-50

990
940

4.5

4.2

97.0

97.0

23.0

-­250V 10/16A

3.15 -

790x245x165 740x525x230

31.10x9.65x6.50

Cross-fan Propeller

Resin Steel

2Row 12Step 1Row 24Step

29.1x20.7x9.1

7.7 28.0
ø6.35 x 5
ø9.52 x 5

ø17 x 2

- Rotary

--

- 1010

15 25

Capillary tube

280
650

-

RAC12131

-9622

AQA12CA(B)ME

SH12ACA(B)

Indoor unit Outdoor unit

Wall-mounting

3.50

1.5

3.80

-

8.0 -

8.5 ­41 53
41 53

2.92

2.81

1-220/240-50

1200
1350

5.4

6.0

97.0

97.0

27.0

-­250V 10/16A

3.15 -

790x245x165 740x525x230

31.10x9.65x6.50 29.1x20.7x9.1

7.7 34.5
ø6.35 x 5
ø9.52 x 5

ø17 x 2

- Rotary

--

- 1300

Cross-fan Propeller

Resin Steel

15 25

2Row 12Step 2Row 24Step

Capillary tube

500
970

-

RAC12128

-9622

2-1Samsung Electronics

2-2 Dimensions

245

165

790

2-2-1 Indoor Unit

Air out

(Front view)

Air
in

(Rear view)

(Remote control)

115

2245

Installation plate

Samsung Electronics2-2

2-2-2 Outdoor Unit

230

506

270

525

740

57

20

11

UQA12CA(B)ME
SH12ACA(B)X
UQA09CA(B)ME
SH09ACA(B)X

Operating Instructions and Installation

UQA07C5(6)ME
SH07AC5(6)X

235

249

497

492

660 50

11

20

2-3Samsung Electronics

2-3 Pressure Graph

11

10

9

8

7

20 30

Outdoor drybulb temperature [deg C]

Low Pressure [kg/cm

2

G]

40

30.6/22.5

27/19

21.5/14.6

10

9

8

7

3

20 30

Outdoor drybulb temperature [deg C]

Low Pressure [kg/cm

2

G]

40

30.6/22.5

27/19

21.5/14.6

10

9

8

7

6

20 30

Outdoor drybulb temperature [deg C]

Low Pressure [kg/cm

2

G]

40

30.6/22.5

27/19

21.5/14.6

■ AQA07C5(6)ME

■ SH07AC5(6)

■ AQA09CA(B)ME

■ SH09ACA(B)

■ AQA12CA(B)ME

■ SH12ACA(B)

Samsung Electronics2-4

3. Operating Instructions and Installation

3-1 Operating Instructions

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

NO

NAMED OF KEY

1

(UP)

2

(DOWN)

3

4

5

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

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

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

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

Press until the appearance. the air condition cools or heats
the room as quickly as possible. after 30minutes, the air,
the airconditioner is reset automatically to the previous mode.

Press until the appearance. the sleep timer can be used when
you are cooling or heating your room to switch the air conditioner off
automatically after a perriod of six hours.

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

FUNCTION OF KEY

: Auto Mode : Fan Only
: Cool Mode : Heat Mode
: Dry Mode

6

7

8

9

Adjust air flow vertically.

The ON Timer enables you to switch onthe air conditioner automatically
after a given period of time that is from 30 minutes to 24 hours.
To cancel, press the (Set/Cancel) button.

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, 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.

3-1Samsung Electronics

Operating Instructions and Installation

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

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

Room Temp
Tr≥ 21°C+∆T
21°C +∆T>Tr

Cool Operation (Set Temp: 24˚C+∆T)

Heat Operation (Set Temp : 22°C+∆T)

Operation Type

∆T= -1°C, -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. (18°C~30°C)

3. HEAT MODE : The unit operates according
to the difference between the setting and
room temperature.(16°C~30°C)
*Prevention against cold wind : For about
3~5 minutes after initial operation, thermo
control or “de-ice”, the indoor fan will
either not operate or operate very slowly,
then switch to the selected fan speed. This
period is to allow the indoor unit's heat­exchanger to prewarm before emitting
warm air.
*High temperature release function : The
outdoor unit for and compressor ON/OFF
control for safety operation, when the over­heat is heat exchanger of indoor unit.
*De-ice : Deicing operation is controlled by
indoor unit's heat exchanger temperature
and accumulating time of compressor's
operation.
De-ice end by sensing of the processing
time by de-ice Condition.

4. 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)

5. TURBO MODE : This mode is available in
AUTO, COOL, HEAT, 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 press the TURBO button in DRY
or FAN mode that is changed with AUTO
mode automatically.

6. SLEEP MODE : Sleep mode is available
only in COOL or HEAT 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.
*In HEAT mode : The setting temperature
is automatically droped by 1°C each 1hour.
When the temperature has been droped by
total of 2°C, that temperature is main­tained.

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

Samsung Electronics3-2

Operating Instructions and Installation

8. 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 func-tion is changed as follow.

STD ➝ NATURE ➝ POWER ➝ SAVING ➝
SILENCE ➝ POWER OFF
❊ STD(standard)( ) : General operation

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

quitely
Each mode has Auto, Cool, Heat and SLEEP
operation designed in advance.

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

11. SELF Diagnosis

LED DISPLAY

SILENCE

Check Point

Indoor unit room temperature sensor
error(open or short)

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)

LED

:

blinking

: LED off

TIMER STD NATURE POWER SAVING

12. 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".

10. 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.

3-3Samsung Electronics

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.

(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 20 grams of refrigerant (R410A) 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.

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.

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.

3-2-1(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).

Samsung Electronics3-4

Cut the piping hole
sloped slightly

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

2

3

1

Tape vinyl

B Drain hose installation

Cut the piping hole
sloped slightly

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

Right

Rear

250mm
or more

5

6

8

Down

70mm or more

7

Rear

200mm or more

Left

“H” metere
s maximum

Remote control

Remote control holder

4

Model L H
**7**

9

**9**

**12**

1
2
3
4
5

Piping (Liquid) 1/4" Clamper tube

7K/9K BTU
12K BTU

Piping(Gas)3/8”
Installation tube Screw
Vinyl tape Drain hose

6
7
8

9

Putty

Installation plate

15 7
15 7
15 7

3-5Samsung Electronics

Operating Instructions and Installation

60

30

252

275

14090

410~730

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

(Unit : mm)

(Unit : mm)

Installation plate

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 fol­lows.

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.

N1 1 2

N1 1 2 3

NL

3

E231

N1

E

2

31

1

N1N1

N1

Indoor unit

Outdoor unit

Earth terminal

Earth terminal

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
metres.

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(N1) to 3.

• Each wire is labelled with the corresponding terminal number.

5. Firmly fix the ass’y cable with clamp wire holdet.

6. Pass the other end of the cable through the 65mm hole in the wall.

7. Replace the connector cover, carefully tightening the screw.

8. Close the front grille.

9. For further details on how to plug the other end of the assembly
cable into the outdoor unit, refer to page 3-8.

Operating Instructions and Installation

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

Care must be taken when installing the drain hose for the indoor unit to ensure that any condensa­tion 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.

5cm
less

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.

Drain hose Extension drain hose

Shield

The hose will be fixed permanently into position once
the whole installation has been tested for gas leaks;

3-7Samsung Electronics

Operating Instructions and Installation

3-2-2(e) Outdoor unit installation

Wiring connection

1. Remove the cover-E parts.

2. Firmly connect the cable connector in the terminal block.

3. Fasten the M4 ring terminal to the hole marked

4. Firmly fix the ass'y cable with clamp wire holder.

5. Assemble the cover-E parts.

6. To prevent the entry of water, form a trap of the ass'y cable as illustrated in the installation
diagram of indoor and outdoor unit.

Ass’y cover valve (RO Hand cabi, RH)

N1 1 2 3

Installing and Connecting the Outdoor Unit Drain Hose

Drain hole

When using the air conditioner in the heating, ice may accumulate.
Duting de-icing, the condensed water must be drained off safely.
Consequently, you must install a drain hose on the outdoor unit,
following the instructions below.

1. Insert the drain plug into the drain hole on the underside of the
outdoor unit.

2. Connect the drain hose to the drain plug.

3. Ensure that the drained water runs off correctly and safely.

Samsung Electronics3-8

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

Operating Instructions and Installation

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.

B

(liquid)

A

(gas)

Vacuum Pump

Valve stem

Stem cap

3-9Samsung Electronics

Operating Instructions and Installation

3-2-2(g) Refrigerant Refill

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

1. Vacuum system with pump (for new
installation, leakage).

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.

Suspension hook

3. Connect the tank to refill with Refrigerant

4. Set the unit to Low pressure checking mode.

* Press the ON/OFF switch for 5 seconds.
* All lamps blink on the indoor unit.

5. Check the pressure indicated by the
pressure gauge(low pressure side).

* Refer to Low pressure graph.

6. Open the refrigerant tank and fill with refrig­erant until the rated pressure is reached.

* It is recommended not to pour the refriger-

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

Compound
gauge

For mounting
other end of
hose when
not in use

Finger tight
fittings

Connected to
high pressure
side

R410A

High
pressure
gauge

Hand
wheel

Vacuum

pump

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 Electronics3-10

3-2-2(h) Refrigerant Adjustment

Operating Instructions and Installation

Class For installation

Connection

Pipe Length

5m Max.

5~10m

Air-Purge
Method

Refer to the
detailed Air-Purge
Procedure

3-2-2(i) Flare nut fixing torque

Outer diameter

ø 6.35 (Liquid Side)

ø 9.52 (Gas Side)
ø 12.7 (Gas Side)

Refrigerant
Adjustment

Unnecessary
Add 20g of refrigerant

R410A(Add as liquid
state) for every 1m.

Fixing Torque Final Torque

160
300
500

Air-Purge
Method

Purge air using a
vaccum pump

Torque (kg-cm)

For service

Refrigerant
Quantity

refer to
specification sheet

Add 20g of refrigerant
R410A(Add as liquid
state) for every 1m.

200
350
550

3-11Samsung Electronics