Samsung AQ18A1QE/B User manual

SERVICE Manual
CONTENTSAIR CONDITIONER
1. Precautions
2.ProductSpecifications
3. OperatingInstructions and
Installation
4.Disassembly and Reassembly
5. Troubleshooting
5. Exploded Views andParts List
6. BlockDiagrams
7. PCBDiagrams
8. Wiring Diagrams
9. SchematicDiagrams
ROOM AIR CONDITIONER
INDOOR
AQT24A1QE/B
AQT24B1QE/B
AQ18A1QE/B
AQ18B1QE/B
SH24ZV
SH18ZV
INDOOR
AQT24A2QE/B
AQT24B2QE/B
AQ18A2QE/B
AQ18B2QE/B

1. Warning: Prior to repair, disconnect the
power cord from the circuit breaker.
2. Use proper parts: Use only exact replace-
ment 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 equip-
ment 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 resis-
tance between the power cord and the
ground terminal. The resistance must be
greater than 30 megohms.
7. Make sure that the grounds are adequate.
8. Make sure that the installation conditions
are satisfactory. Relocate the unit if neces-
sary.
9. Keep children away from the unit while it is
being repaired.
10. Be sure to clean the unit and its surround-
ing area.
Samsung Electronics 1-1
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

Samsung Electronics 2-1
2. Product Specifications
2-1 Table
Model
Item
Power Sourse
UNIT
Capacity
Air circulation (High) m3/min
Moisture removal (High) Liters/h
Available voltage range V
Running amperes A
Power input kw
Power factor %
Energy efficiency ratio BTU/wh
Compressor locked rotor amperes A
Controls/Temperature control
Control unit
Timer
Fan speed Indoor/Outdoor
Airflow direction (indoor) Horizontal
Vertical
Comperssor
Refrigerant/Amount charged at rating g
Refrigerant control
(Sound pressure) Indoor Hi/Me/Lc dB-A
Outdoor-Hi dB-A
Refrigerant tubing connections
Max. allowable tubing length at shippint m
Refrigerant tube diameter Narrow tube (in.)
Wide tube (in.)
Refrigerant tube kit/Accessories
Unit dimensions Height mm
Width mm
Depth mm
Package dimensions Height mm
Width mm
Depth mm
Weight Net kg
Shipping kg
AQT24A1(B1)QE / AQT24A2(B2)QE/SH24ZV
Cool Heat
220-240V~, 50Hz
BTU KW BTU KW
24,000BTU/h 6.80KW 24,000BTU/h 6.90KW
14.0 14.0 14.5 14.5
3.0
198 ~ 264
12.5 12.5 13.0 13.0
2.6 2.6 2.7 2.65
86.7 86.7 86.5 84.9
9.2 - 8.9 -
82
Microprocessor / I.C Thermostat
Wireless remote control
Q-Timer / 24-Hour ON or OFF
3 Steps and Turbo / 1 Step
Manual
Auto
Reciprocating(Tecumseh)
R22 / 1,600g
Capillary tube
45 / 43 / 41
58
Flare type
10
6.35(1/4”)
15.88(5/8”)
Optional / Hanger-plate
AQT24A1(B1)QB / AQT24A2(B2)QB
Cool Heat
220V~, 60Hz
BTU KW BTU KW
24,000BTU/h - 24,000BTU/h -
14.0 - 14.5 -
3.0
187 ~ 253
13.0 - 13.5 -
2.6 - 2.7 -
90.9 - 90.9 -
9.2 - 8.9 -
73
Microprocessor / I.C Thermostat
Wireless remote control
Q-Timer / 24-Hour ON or OFF
3 Steps and Turbo / 1 Step
Manual
Auto
Reciprocating(Tecumseh)
R22 / 1,600g
Capillary tube
45 / 43 / 41
58
Flare type
10
6.35(1/4”)
15.88(5/8”)
Optional / Hanger-plate
AQ18A1(B1)QB / AQ18A2(B2)QB
Cool Heat
220V~, 60Hz
BTU KW BTU KW
18,000BTU/h - 20,000BTU/h -
13.5 - 14.0 -
2.5
187 ~ 253
8.5 - 9.0 -
1.85 - 1.95 -
98.9 - 98.5 -
9.7 - 10.3 -
35
Microprocessor / I.C Thermostat
Wireless remote control
Q-Timer / 24-Hour ON or OFF
3 Steps and Turbo / 1 Step
Manual
Auto
Rotary(SAMSUNG)
R22 / 1,550g
Capillary tube
45 / 42 / 39
55
Flare type
10
6.35(1/4”)
12.70(1/2”)
Optional / Hanger-plate
AQ18A1(B1)QE / AQ18A2(B2)QE/SH18ZV
Cool Heat
220-240V~, 50Hz
BTU KW BTU KW
18,000BTU/h 5.10KW 20,000BTU/h 5.60KW
13.5 13.5 14.0 14.0
2.5
198 ~ 264
8.3 8.3 8.5 8.5
1.85 1.80 1.95 1.85
92.9 90.4 95.6 90.7
9.7 - 10.3 -
35
Microprocessor / I.C Thermostat
Wireless remote control
Q-Timer / 24-Hour ON or OFF
3 Steps and Turbo / 1 Step
Manual
Auto
Rotary(SAMSUNG)
R22 / 1,550g
Capillary tube
45 / 42 / 39
55
Flare type
10
6.35(1/4”)
12.70(1/2”)
Optional / Hanger-plate
Perfor-
mance
Electrical
Rating
Features
Dimensions
&
Weight
Indoor unit Outdoor Indoor unit Outdoor Indoor unit Outdoor Indoor unit Outdoor
275
1080
204
372
1153
272
13
16
638
880
310
851
1023
413
63.0
67.0
275
1080
204
372
1153
272
13
16
638
880
310
851
1023
413
63.0
67.0
275
1080
204
372
1153
272
13
16
620
787
320
680
926
451
46.0
50.0
275
1080
204
372
1153
272
13
16
620
787
320
680
926
451
46.0
50.0
Remarks : Rating Conditions are :
Indoor air temperature ISO(50Hz) : 27˚C DB/19.0˚C WB, ISO(60Hz) : 27.0˚C DB/19.5˚C WB
Outdoor air temperature ISO : 35.0˚C DB/24.0˚C WB

Samsung Electronics
2-2
2-2 Major Component specifications
Model
Part No.
Controls
Control circuit fuse
Type
Dia. and length mm
Fan motor model
Pols,rpm(at 240V)
Normal out W
Coil resistance(Ambient temp.20˚C) Ω
Safety devices Type
Operating temp. Open ˚C
Run capacitor µF x VAC
Type
Model
Rating
Coil resistance (Ambient temp. 25˚C) Ω
Coil
Rows x Steps
Fin pitch mm
Face area m2
AQT24A1(B1)QE / AQT24A2(B2)QE/ SH24ZV
PD-Q24B1Q-03
Microprocessor
250V, 3.15A
Cross-Flow
ø95/L = 842
IC-9430SKJ5A
4P,1350RPM
40W
MAIN : 160Ω
SUB : 227Ω
17AM034A5
135 ± 5°C
1.2µF X 450VAC
MSFCC20A03
DC 12V
530Ω
AL-FIN/Copper tube
2 x 15
1.2
0.315
AQT24A1(B1)QB/ AQT24A2(B2)QB
PD-Q24B1Q-03
Microprocessor
250V, 3.15A
Cross-Flow
ø95/L = 842
IC-9430SKF6A
4P, 1350 RPM
40W
MAIN : 140Ω
SUB : 280Ω
17AM034A5
135 ± 5°C
1.2µF X 450VAC
MSFCC20A03
DC 12V
530Ω
AL-FIN/Copper tube
2 x 15
1.2
0.315
AQ18A1(B1)QE/ AQ18A2(B2)QE/ SH18ZV
PD-Q24B1Q-09
Microprocessor
250V, 3.15A
Cross-Flow
ø95/L = 842
IC-9430SKJ5A
4P,1350RPM
40W
MAIN : 160Ω
SUB : 227Ω
17AM034A5
135 ± 5°C
1.2µF X 450VAC
MSFCC20A03
DC 12V
530Ω
AL-FIN/Copper tube
2 x 15
1.5
0.315
AQ18A1(B1)QB / AQ18A2(B2)QB
PD-Q24B1Q-09
Microprocessor
250V, 3.15A
Cross-Flow
ø95/L = 842
IC-9430SKF6A
4P, 1350 RPM
40W
MAIN : 140Ω
SUB : 280Ω
17AM034A5
135 ± 5°C
1.2µF X 450VAC
MSFCC20A03
DC 12V
530Ω
AL-FIN/Copper tube
2 x 15
1.5
0.315
PCB
■Indoor unit
■Outdoor unit
Fan &
Fan
Motor
S-Motor
Heat
Exch.
Model
Type
Compressor model
Normal output W
Comperssor oil kind
Comperssor oil cc
Oil Specific gravity
Coil resistance(Ambient temp.25˚C) Ω
Safety devices Type
Overloal relay
Operating temp. Open ˚C
Close ˚C
Operating amp(Ambient temp.)
Run capacitor µF x VAC
Type
Dia. and length mm
Fan motor model
Pols, rpm(at240V)
Normal output W
Coil resistance(Ambient temp.20˚C) Ω
Safety devices Type
Operating temp. Open ˚C
Close ˚C
Run capacitor µF x VAC
Coil
Rows x Steps
Fin pitch mm
Face area m2
UQT24A1(B1)QE /UQT24A2(B2)QE / XSH24ZV
Reciprocating
AWG5532EXC
2660
WITCO LP200 OR EQUIVALENT
INITIAL : 1125 REFILL : 1066
0.92
Start winding : 2.49
Run winding : 0.81
15HM2415-148
Internal Line Break
120
69
73.0 AT 2-10 SECOND
45MF X 370VAC
Propeller
ø460
OSME-716SRC
6P, 850 RPM
70W
MAIN : 58Ω- 88Ω
SUB : 85Ω- 150Ω
17AM034A5
135±5°C
3µF x 450VAC
AL-FIN / Copper tube
2 x 24
1.7
0.5376
UQT24A1(B1)QB / UQT24A2(B2)QB
Reciprocating
AWG5528EXN
2830
WITCO LP200 OR EQUIVALENT
INITIAL : 1125 REFILL : 1066
0.92
Start winding : 1.94
Run winding : 0.88
15HM2415-148
Internal Line Break
120
69
73.0 AT 2-10 SECOND
35MF X 370VAC
Propeller
ø460
OSME-716SRC
6P, 850 RPM
70W
MAIN : 58Ω- 88Ω
SUB : 85Ω- 150Ω
17AM034A5
135±5°C
3µF x 450VAC
AL-FIN / Copper tube
2 x 24
1.7
0.5376
UQ18A1(B1)QE / UQ18A2(B2)QE/ XSH18ZV
Rotary
48B180JV1E7
1885
SUNSO-4GSD-T
600
0.92
Common to main : 1.84
Common to sub : -
MRA12016-12007
External Line Break
165°C
74°C
120·°C : 10.7A 130°C : 9.4A
40µF X 450VAC
Propeller
ø405
AMASS-035AVEB
4P, 1050 RPM
35W
MAIN : 186Ω
SUB : 210Ω
17AM037A5
150±5°C
2.5µF x 450VAC
AL-FIN / Copper tube
2 x 24
1.7
0.504
UQ18A1(B1)QB / UQ18A2(B2)QB
Rotary
48B190IV2E7
1885
SUN1SO-4GSD-T
600
0.92
Common to main : -
Common to sub : -
MRA12016-12007
External Line Break
165°C
74°C
120·°C : 10.7A 130°C : 9.4A
40µF X 450VAC
Propeller
ø405
AMASS-035ZTEA
4P, 1050 RPM
35W
MAIN : 127Ω
SUB : 165Ω
17AM037A5
150±5°C
2.5µF x 450VAC
AL-FIN / Copper tube
2 x 24
1.7
0.504
Compressor
Fan &
Fan
Motor
Heat
Exch.

Samsung Electronics 2-3
2-3 Dimensions
2-3-1 Indoor Unit
2-3-2 Outdoor Unit
2-3-2(a) 24K BTU
(Front view)
1080 204
(Remote control)
(Rear view)
(Front view) (Rear view)
660
878
58 22

Product Specifications
2-4 Samsung Electronics
2-3-3(b) 18K BTU
(Front view) (Rear view)
582
787
340

2-5
Samsung Electronics
2-4 Pressure Graph
24K BTU
18K BTU

Samsung Electronics 3-1
3. Operating Instructions and Installation
3-1 Operating Instructions
NO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
NAMED OF KEY
MODE
(UP)
(DOWN)
TURBO
OFF
ON TIMER
OFF TIMER
SET
CANCEL
(UP)
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)
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.
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.
Use this button to reserve or cancel the timer on and timer off.
Use this button to reserve the timer on.
Set up the time that operation stop.
Set up the time that operation start.
Each time you press this button,
FAN SPEED is changed in the following order.
Adjusts air flow vertically.
Use this button for sleep operation.
(The SLEEP mode can be selected at COOL and HEAT mode.)
Set up the reserve or cancel the timer on and timer off quickly
Use this button to provide heavy duty cooling & Heating for 30 minutes.
Each time you press this button,
MODE is changed in the following order.
Temp. down button. If the button is pressed once,
the setting temperature is decreased by 1°C
Temp. up button. If the button is pressed once,
the setting temperature is increased by 1°C
On/Off Button. Use this button to start and stop air conditioner.
FUNCTION OF KEY
(DOWN)
TIME
3-1-1 Name & Function of Key in remote controller
C
O
V
E
RT
I
M
E
R
: Auto Mode
: Cool Mode
: Dry Mode
: Fan Only Mode
: Heat Mode

Samsung Electronics
3-2
Operating Instructions and Installation
1. AUTO MODE : In this mode, operation
mode(COOL, HEAT) is selected automati-
cally by the room temperature of initial
operation.
∆T= -2°, -1°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 heat-
exchanger to prewarm before emitting
warm air.
*High temperature release function : The
outdoor unit for and compressor ON/OFF
control for safety operation, when the over-
heat 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 :
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 tempera-
ture, 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 main-
tained.
*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 main-
tained.
7. FAN SPEED : Manual / Auto
Fan speed automatically varies depending
on both the difference between setting and
the room temperature.
Room Temp
Tr≥21°C+∆T
21°C +∆T>Tr
Operation Type
Cool Operation (Set Temp:24°C+∆T)
Heat Operation (Set Temp : 22°C+∆T)
3-1-1 Name & Function of Key in remote controller

Samsung Electronics 3-3
8. COMPULSORY OPERATION :
For operating the air conditioner without
the remote controller.
*AUTO : The operating is the same func-
tion that AUTO MODE in the remote con-
troller.
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 press
the button, blatles location is stop.
10. 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 oper-
ating state, LCD displays the polling state
sequentially.
The LCD also displays the time remaining.
11. 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.
12. SELF Diagnosis
13. 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"
ON TIMER
OFF TIMER
Interruption of electric power and Power on.
Check Point
LED DISPLAY
oper-
ation
TIMER FAN
LED
:blinking : LED off
Turbo
Abnormal condition of the room sensor.
Indoor unit fan motor lock.
Abnormal condition of the indoor unit's heat exchanger sensor.
Operating Instructions and Installation

Samsung Electronics
3-4
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, cord-
less 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 connec-
tion 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 accomo-
date 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 (18XX:20g, 24XX:30g) 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 accom-
modate 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-
trol 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 con-
trol 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 con-
trol 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.

Operating Instructions and Installation
3-5
Samsung Electronics
3-2-2 Installation diagram of indoor unit and outdoor unit
AIndoor unit gas leak test check point
Tape vinyl
Piping
Indoor unit
BDrain hose installation
Cut the piping hole
sloped slightly
Piping (Liquid) 1/4" Clamper tube
Installation plate
Installation tube Pipe-connection
Vinyl tape Screw
Putty Drain hose
Piping may be laid to the rear, left,
right or down .
Right
Rear Down
125mm
ormore
125mmor more
Rear
Left
3
2
5 6
4
10
1
2
3
4
5
6
7
8
9
10
1
Remote control
Remote control holder
18K BTU Piping(Gas) 1/2”
24K BTU Piping(Gas) 5/8”

Operating Instructions and Installation
3-6 Samsung Electronics
3-2-2(a) Fixing the Installation Plate
3-2-2(b) Purging the Unit
Installation plate
512
(Unit : mm)
415
227288
(Unit : mm)
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 appro-
priate 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.
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 oppo-
site.
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.

Operating Instructions and
3-7
Samsung Electronics
3-2-2(c) Connecting the Assembly Cable.
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 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.
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.
Indoor
unit
Outdoor
unit
The indoor unit is powered from the outdoor 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 15
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 to 5.
• 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 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.
The hose must
NOT slope upw
ards.
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

Operating Instructions and Installation
3-8 Samsung Electronics
3-2-2(e) Outdoor unit installation
AUXILIARY POWER S/W
INSTALLATION OF DRAIN LINE
WIRING CONNECTION
AuxiliarypowerS/Wshouldbeinstallednearindoorunitso
thateachaccessispossible.Main/Outdoorunitpower
cordsareconnectedtoupper/lowerterminalofauxiliarypowerS/W.
Indoorunitconnectorwireshouldbeconnectedtobothindoorunit
connectorandoutdoorunitterminalboardasshowninthe
figurebelow.
Inheatinganddeiceoperation,condensedwatermaybegenerated.
Installdrainlineasfollowingprocedure.
1.Insertthedrainplugintobasehole
2.Andthenconnectdrainhosetodrainplug.
distributind
board
Auxiliary
power S/W
EARTH WIRE
EARTH WIRE
(POWER CABLE)
INDOOR OUTDOOR
(ASSEMBLY CABLE)
Hole Drain plug
Base
Drain Hose

Operating Instructions and Installation
3-9
Samsung Electronics
3-2-2(f) Flare Modification
Flare modification procedure
1) Cut the pipe using a pipe cutter.
• Tools used
2) Remove burrs at the tip of the pipe cut.
Caution : Burrs not removed may result in
leakage of gas.
3) Insert a flare nut into the pipe and
modifty flare.
* Unproper flaring
Outer diameter A(mm)
ø6.35mm 1.3
ø9.52mm 1.8
ø12.7mm 2.0
ø15.8mm 2.2
Oblique Raughness Burr
Pipe
Reamer
Inclined Surface
damaged Cracked Uneven thickness
DA

Operating Instructions and Installation
3-10 Samsung Electronics
3-2-2(g) Air-Purge Procedure
• Use the refrigerant of the outdoor unit to purge air inside indoor unit and pipe.
not
leaking
1. Remove the caps from the 2-way valve(B)
and the 3-way valve(A).
3Check refrigerant leakage of each joint parts
(A, B, C & D in right figure)
6. Open the 2-way valve and 3-way valve
completely
4. Open the 2-way valve again.
7. Close the cap of each valve.
8. Check each valve for leakage.
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.
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.
2 Turn the 2-way valve cock approx. 45°
counterclockwise to open it. Close it
about 10 seconds later. Valve stem
Stopper
Valve stem
Indoor Unit
Outdoor Unit
Liquid pipe side
2-way valve 3-way valve
Gas pipe side

Operating Instructions and Installation
3-11
Samsung Electronics
3-2-2(h) Refrigerant Refill
• Refill an air-conditioner with refrigerant when refrigerant has been leaked at installing or using
1. Purge air(for new installation only).
3. Connect the tank to refill with Refrigerant
4. Set the unit to cool operation mode.
7. Stop operation of the air conditioner.
9. Close the cap of each valve.
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.
5. Check the pressure indicated by the
pressure gauge(low pressure side).
* Standard pressure is should be
4.5~5.5kg/cm2in a reqular, high operation
mode.
6. Open the refrigerant tank and fill with refrig-
erant until the rated pressure is reached.
* It is recommended not to pour the
refrigerant in too quickly, but gradually
while operating a pressure valve.
8. Close the 3-way valve, disconnect the
pressure gauge, and open the 3-way
valve again.
Suspension hook
High
pressure
gauge
Hand
wheel
Finger tight
fittings
Connected to
high pressure
side
Charging
line
For mounting
other and of
hose when
not in use
Compound
gauge

Operating Instructions and Installation
3-12 Samsung Electronics
3-2-2(i) Refrigerant Adjustment
3-2-2(j) Flare unt fixing torque
Class At installation At service
Outter diameter
ø 6.35 mm
(Liquid Side)
ø 9.52 mm
(Gas Side)
ø 12.7 mm
(Gas Side)
ø 15.8 mm
(Gas Side)
160
300
500
700
200
350
550
750
Fixing Torque Final Torque
Torque (kg-cm)
Connection
Pipe Length
5m Max.
5~10m
Air-Purge
Method
Refer to the
detailed Air-Purge
Procedure
Refrigerant
Adjustment
Unnecessary
Add “A” of refrigerant
(R-22) for every 1m.
Air-Purge
Method
Purge air using a
vaccum pump
or an additional
refrigerant cylinder.
Refrigerant
Quantity
refer to
specification sheet
Add “A” of refrigerant
(R-22) for every 1m.
MODEL
24K BTU
18K BTU
“A”
30g
20g

Samsung Electronics 3-13
3-2-2(k) "Pump down" Procedure
•Pump down' shall be carried out when an evaporator is replaced or when the unit is relocated in
another area.
1. Remove the caps from the 2-way valve
and the 3-way valve.
3. Set the unit to cool operation mode.
(Check if the compressor is operating.)
5When the pressure gauge indicates "0"
turn the 3-way valve clockwise to close.
4. Turn the 2-way valve clockwise to close.
6. Stop operation of the air conditioner.
7. Close the cap of each valve.
2 Turn the 3-way valve clockwise to close
and connect a pressure gauge(low
pressure side) to the service valve, and
open the 3-way valve again.
Relocation of the air conditioner
•Refer to this procedure when the unit is
relocated.
1. Carry out the pump down procedure (refer
to the details of 'pump down').
2. Remove the power cord.
3. Disconnect the assembly cable from the
indoor and outdoor units.
4. Remove the flare nut connecting the indoor
unit and the pipe.
At this time, cover the pipe of the indoor
unit and the other pipe using a cap or vinyl
plug to avoid foreign material entering.
5. Disconnect the pipe connected to the outdoor
unit.
At this time, cover the valve of the outdoor
unit and the other pipe using a cap or vinyl
plug to avoid foreign material entering.
6. Make sure you do not bend the connection
pipes in the middle and store together with
the cables.
7. Move the indoor and outdoor units to a new
locatioon.
8. Remove the mounting plate for the indoor
unit and move it to a new location.
2-Way Valve
3-Way Valve
Operating Instructions and Installation