SAMSUNG AQV12F2VE Service Manual

ROOM AIR CONDITIONER

INDOOR UNIT
AQV12F2VE

SERVICE

OUTDOOR UNIT
UQV12A0TE

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. PCB Diagrams

8. Wiring Diagrams

© Samsung Electronics Co., Ltd. FEB. 1999.

Printed in Korea.
Code No. DB81-00019A(1)

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-

ment parts. (Also, we recommend re p l a c i n g
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- i n t e r m i t t e n t
contact, for example.

4 . Power Cord: Prior to re p a i r, 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 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
g round terminal. The resistance must be
g reater 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

a re satisfactory. Relocate the unit if neces­s a r y.

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-

ing are 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 (Indoor)

Item (Outdoor)

Power Source ø-V-Hz

Capacity W

Btu/h

Cooling Energy efficiency ratio Btu/wh

Air flow m2/min
Moisture removal L/h

Performan
ce

Heating Energy efficiency ratio Btu/wh

Available voltage range V
Cooling Power input W

Electrical
Rating

Compre
ssor

Fan
motor

Refrigerant tube Narrow tube : Liquid mm X MT

Capillary tube Cooling mm
Refrigerant to charge (R22) gr

Dimension Indoor unit : W x H x D

Weight Indoor unit

Heating Power input W
Starting current A

Fuse capacity A X V
Power cord A X V
Cable-connector mm2X C
Type ­Model name ­Safety devices ­Indoor Model name -

Outdoor Model name -

Noise level Indoor

Outdoor

Capacity W

Air flow m3/min
Noise level Indoor

Outdoor

Running amperes A
Power factor %

Running amperes A

Power factor %

Running capacitor µF X VAC
Running capacitor µF X VAC
Wide tube : Gas mm X MT

Heating mm

Outdoor unit : W x H x D

Outdoor unit

dBA

Btu/h

dBA

Remark : Text condition

Cooling test DB27˚C / WB19˚C DB35˚C / WB24˚C
Heating test DB20˚C / - DB 7˚C / WB 6˚C

A Q V 1 2 F 2 V E
U Q V 1 2 A 0 T E

1-220/240-50

3,500 (2,580~4,100)

12,000 (8,800~14,000)

9.4 (11.3~8.4)

8.4

1.9

36~40

51

3,800 (2580~4830)

13,000 (8800~16500)

9.8 (11.9~8.2)

8.8

34~38

52

187~264

5.6 (3.7~7.1), (MAX 12A↓)
1,280 (780~1,650)

95.0 (90.0~97.0)

5.7 (3.3~8.5), (MAX 12A↓)
1,330 (740~1,980)

98.0(94.0~97.0)
12 ↓

3.15X250 / 20X250
12 X 250

1.5 X 4

Single Rotary

48V135RV1E4

204CT

AMPFS-040WTVB

1.5 X 450

AMASS-020WTVB

1.5 X 450
OD6.35 X 5
OD12.7 X 5

ID1.7 X 800
ID1.7 X 600

1,000
815x298x193
762x532x280

9.2

44.0

Indoor room Outdoor room

R e m a r k

Samsung Electronics

2-1

2-2 Dimensions

2-2-1 Indoor Unit

Air
in

Air out

(Remote control)

(Front view)

2-2-1 Outdoor Unit

(Rear view)

Installation plate

(Front view) (Rear view)

2-2

Samsung Electronics

2-3 Refrigerating Cycle Block Diagram

INDOOR UNIT

Heat
exchanger
(Evaporator)

OUTDOOR UNIT

Capillary tube

T

Liquid side

T

Gas side

2-way valve

3-way valve

Check valve

Capillary tube

Compressor

Heat
exchanger
(Condenser)

4-way valve

Cooling
Heating
Gas leak check point

Samsung Electronics

2-3

M E M O

2-4

Samsung Electronics

3. Operating Instructions and Installation

3-1 Operating Instructions

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

NO

NAMED OF KEY
1
2

3

MODE

4
5

6

7

8

TURBO

OFF

(UP)

(DOWN)

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,
FAN SPEED is changed in the following order.

FUNCTION OF KEY

: Auto Mode
: Cool Mode
: Dry Mode

: Fan Only Mode
: Heat Mode

9

C
O

10

V
E
R

11
12
13

14

15

Samsung Electronics

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
mode(COOL, HEAT) is selected automati­cally by the room temperature of initial
o p e r a t i o n .

Room Temp
Tr≥ 21°C+∆T
21°C +∆T>Tr

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

up( )/down( ) key of re m o t e
c o n t ro l l e r

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. H E AT MODE : The unit operates accord i n g
to the diff e rence between the setting and
room temperature.(16°C~30°C)
* P revention against cold wind : For about
3~5 minutes after initial operation, thermo
c o n t rol or “defrost”, 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
c o n t rol for safety operation, when the over­heat is heat exchanger of indoor unit.
* D e f rost : Deicing operation is contro l l e d
by outdoor unit's heat exchanger tempera­t u re and outdoor temperature and accumu­lating time of compressor's operation.
De-ice end by sensing of the pro c e s s i n g
time by de-ice Condition.

Cool Operation (Set Temp:24°C+∆T)

Heat Operation (Set Temp : 22°C+∆T)

Operation Type

4. D RY MODE :
The unit operates in DRY m o d e .
* P rotective function : Low temperature
release. (Prevention against fre e z e )

5. TURBO MODE : This mode is available in
A U TO, COOL, HEAT, DRY, FAN, SLEEP
M o d e .
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.

6 . S L E E P 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 main­t a i n e d .
*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 main­t a i n e d .

7. FAN SPEED : Manual / Auto
Fan speed automatically varies depending
on both the diff e rence between setting and
the room temperature .

3-2

Samsung Electronics

8 . 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.

9 . SWING : BLADE-H is rotated vertically by

the stepping motor.
*Swing Set / Auto : Press the button
under the remote control is displayed on
LCD the , and the blades move up and
down, about 43°. If the one more time pre s s
the button, blatles location is stop.

1 0 . 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 .

11 . 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.

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"

1 3 . SELF Diagnosis

The indoor unit observes operation of the
a i r- c o n d i t i o n e r, and displays the results of
self diagnosis on display pannel.

Operating Instructions and Installation

E rror mode

O p e r a -

t i o n

X X X X X X

X X X X X

X X X X X

X X X X

X X X X X

X X X X

X X X X

(Lamp status)

R e s e rv a -

D e f ro s t

X X X X X

X X X X

X X X X

: Lamp flickeringX: Lamp off

t i o n

Power

m o n i t o r

L A M P

O N

F a n Tu r b o

Operation off
Power re s e t
Trouble of indoor temperature

sensor (open/short )
Te m p e r a t u re sensor trouble of

the indoor heat exchanger
( o p e n / s h o rt )

Stuck of the indoor fan motor
( t rouble of ro t a t i o n )

Trouble of outdoor unit tempera­t u re sensor

- Discharge temperature sensor

- OLP temperature sensor of
COMP top

- Defrost temperature sensor

- Outdoor temperature sensor
Communication trouble between

the indoor and outdoor units
(Misconnection or circuit tro u b l e
of the indoor and outdoor units)

A b n o rmal increase of the opera­tion curre n t

O c c u rring of the inverter circ u i t
instantaneous over curre n t .

A b n o rmal increase of the COMP.
Top and discharge gas tempera­t u re .

Refrigerant Refill operation (test
o p e r a t i o n )

1 4 . A U TO RESTA RT : The air conditioner starts

immediately without control of re m o t e
c o n t roller when plugged.
It’s the case that the A u t o - restart fanction
w o r k s .
* Auto restart function is the convenient

function where the operation state is mem­orized in the Memory IC during the black­out and the operation restarts when the
power comes back.

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 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(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 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

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

Right

Rear

160mm
or more

5

6

Down

7 8 9

Rear

100mm or more

Left

1
2
3

4
5

Samsung Electronics

4

10

Piping (Liquid) 1/4" Clamper tube

9K BTU Piping(Gas)3/8”
12K BTU Piping(Gas)1/2”

Installation tube Pipe-connection
Vinyl tape Screw
Putty Drain hose

6

7
8

9

10

Remote control

Remote control holder

Installation plate

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
m e t re s .

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

Indoor unit

Earth

terminal

Earth

terminal

Outdoor unit

L : Brown
N : Sky blue
C : Black
E : Yellow/ Green

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 C, N, L, E.

• Each wire is labelled with the corresponding terminal number.

5 . Firmly fix the ass’y cable with clamp wire holder.
6 . Pass the other end of the cable through the 65mm hole in the wall.

7 . Replace the connector cover, carefully tightening the scre w.
8 . Close the front grille.

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

3-7

Operating Instructions and

3-2-2(e) Outdoor unit installation

Wiring connection

1. Remove the Handle-Cabi RH.

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

3. Fasten the terminal to the hole marked

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

5. Assemble the Handle-Cabi RH.

Installing and Connecting the Outdoor Unit Drain Hose

When using the air conditioner in the heating mode, ice may accumu -

Drain hole

late. During de-icing, the condensed water must be drained off safely.
C o n s e q u e n t l y, you must install a drain hose on the outdoor unit, fol ­lowing 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 E n s u re that the drained water runs off correctly and safely.

3-8

Samsung Electronics

3-2-2(f) Flare Modification

• Tools used

Flare modification procedure

Operating Instructions and Installation

1 ) Cut the pipe using a pipe cutter.

Oblique Raughness Burr

3 ) Insert a flare nut into the pipe and

modifty flare .

2 ) Remove burrs at the tip of the pipe cut.

Caution : Burrs not removed may result in

leakage of gas.

Pipe

Reamer

D

A

Outer diameter A(mm)

ø6.35mm 1.3
ø9.52mm 1.8
ø12.7mm 2.0

* Unproper flaring

Samsung Electronics

Inclined Surface

damaged

Cracked Uneven

thickness

3-9

Operating Instructions and Installation

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

• Use the refrigerant of the outdoor unit to purge air inside indoor unit and pipe.

1. Remove the caps from the 2-way valve(B)
and the 3-way valve(A).

2. Turn the 2-way valve cock approx. 45°
counterclockwise to open it. Close it
about 10 seconds later.

Valve stem

3. Check refrigerant leakage of each joint parts
(A, B, C & D in right figure)

Valve stem

Stopper

not

Leaking

leaking

If leaking, tighten the flare nut one more time.
If continues to leak, although the pipe fixing
area has been tightened again,
repair the leaking area.

4. Open the 2-way valve again.

5. Open the service valve cap of the 3-way
valve and press the needle valve to
discharge gas for 3 seconds and leave it
for about 1 minute.
Repeat the above procedure for 3 times
to purge air.

6. Open the 2-way valve and 3-way valve

completely

Indoor Unit

Liquid pipe side

2-way valve 3-way valve

Gas pipe side

7. Close the cap of each valve.

8. Check each valve for leakage.

3-10

Outdoor Unit

Samsung Electronics