LG LSC091PMA User manual

SERVICE MANUAL
Room Air Conditioner
MODEL : LSC091PMA
LSC121PMA

Contents
Details of 2003 LG Model Name............................................................................................ 3
Functions................................................................................................................................4
Product References .............................................................................................................. 6
Dimensions............................................................................................................................. 7
Refrigeration Cycle Diagram................................................................................................. 9
Wiring Diagram..................................................................................................................... 10
Operation Details ................................................................................................................. 11
Display Function .................................................................................................................. 17
Self-diagnosis Function....................................................................................................... 17
Installation ............................................................................................................................ 18
Operation .............................................................................................................................. 33
Disassembly of the parts (Indoor Unit).............................................................................. 33
2-way, 3-way Valve................................................................................................................ 35
Cycle Troubleshooting Guide.............................................................................................. 42
Electronic Control Device.................................................................................................... 52
Schematic Diagram.............................................................................................................. 55
Exploded View and Replacement Parts List...................................................................... 57
-2-

Details of 2003 LG Model Name
-3-
12
Code Type Code of Model Meaning
1 Producing Center/ A~Z L: ChangWon R22, A: ChangWon R410A, C: ChangWon
R407C
Refrigerant
2 Type of Air conditioner A~Z S: Split Type Air conditioner
3 Cooling/Heating A~Z C: C/O, H: H/P, X: C/O + E/H, Z: H/P + E/H
4,5 Capacity(Btu/h) 1~9 Cooling/Heating Capacity
Ex. "09" ➔9,000Btu/h
6 Electric Range 1~9 Electric Standard
1 ➔115V/60Hz 6 ➔220~240V/50Hz
2 ➔ 220V/60Hz 7 ➔110V, 50/60Hz
3 ➔208~230V/60Hz 8 ➔380~415V/50Hz
5 ➔200~220V/50Hz 9 ➔380~415V/60Hz
7 Chassis A~Z Name of tool of unit
8 Color A~Z R: Mirror B: Blue N: Walut
W: White M: Metal C: Cherry
9 Function A~Z
10 Serial No. 0~9
-
Basic A
Basic + 4Way B
Plasma Filter C
Plasma Filter + 4Way D
Tele + LED + 4Way E
Tele + LCD + Plasma F + 4Way F
Tele Multi + LCD + Plasma F + 4Way G
Low A + Plasma F H
Low A + Plasma F + 4Way J
Plasma F + 4Way + Oxygen Generator K
A/change + Plasma F L
A/change + Plasma F + 4Way M
345678910

Functions
• Room temperature sensor. (THERMISTOR)
• Maintains the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 sec at the starting.
• Restarting is inhibited for approx. 3 minutes.
• High, Med, Low, CHAOS
• Intermittent operation of fan at low speed.
• The fan is switched to low(Cooling), med(Heating) speed.
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
• The fan is switched to intermittent or irregular operation
• The fan speed is automatically switched from high to low speed.
• The louver can be set at the desired position or swing
up and down automatically.
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Time Delay Safety Control
Indoor Fan Speed Control
Operation indication Lamps (LED)
Soft Dry Operation Mode
• Both the indoor and outdoor fan stops dur-
ing defrosting.
• The indoor fan stops until the
evaporator pipe temperature will be reached
at 28°C.
Sleep Mode Auto Control
Natural Air Control by CHAOS Logic
Airflow Direction Control
-4-
Defrost(Deice) control (Heating)
Hot-start Control (Heating)
Signal Receptor
Receives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.)
Operation Indication Lamps
On/Off : Lights up during the system operation.
Sleep Mode : Lights up during Sleep Mode Auto operation.
Timer : Lights up during Timer operation.
Defrost Mode : Lights up during Defrost Mode or
Hot Start operation.(Heat pump model only)
Outdoor unit operation : Lights up during outdoor unit operation.
(Cooling model only)
OUT
DOOR

-5-
Healthy Dehumidification Operation Mode. ( )
Remote Control
Operation ON/OFF
Reset
Operation Mode Selection
Temperature Setting
Timer Selection
Timer Setting
JET COOL
Timer Cancel
Sleep Operation
Airflow Direction Control
(Cooling
model only) (Heating
model only)
TEMPERATURE LOW HIGH
Cooling Operation Mode.( ) Heating Operation Mode.( ) Auto Operation Mode.( )
Air Circulation
Horizontal Airflow Direction Control Button(Optional)
Room, Temperature Checking
Setting the Time or Timer
Fan Speed Selection
(Low) (Med) (High)
ON OFF
CANCEL
SET
2nd F
: (Low:11°C High:39°C)
: OFF, ON, OFF ON
: Cancel Sleep Mode, Timer ON or Timer OFF
: 1, 2, 3, 4, 5, 6, 7, Off Timer
: Fan Operates without cooling or heating.
Cooling Down to 18°C
Up to 30°CHeating Down to 16°C Up to 30°C

-6-
Product References
NOTE: Please refer to Label Quality on the product since this specification may be changed for improving
performance
Items Unit
LSC091PMA LSC121PMA
Power Supply ø, V, Hz 1, 115V, 60 1, 115, 60
Cooling Capacity BTU/h 9,000 12,000
Input W 940 1,290
Running Current A 8.5 11.7
COMP. Locked Rotor AMP. A 46 58
E.E.R BTU/hW 9.6 9.3
Air Circulation m3/min(cfm) 7.1(250) 8.8(330)
Moisture Removal l/h(pts/hr) 1.2(2.6) 1.4(3)
Noise Level Indoor, High dB(A)±3 39 43
(Sound Med dB(A)±3 34 37
Pressure, 1m) Low dB(A)±3 30 34
Outdoor, Max dB(A)±3 46 46
Features Temperature Control Thermistor Thermistor
Air Deflection 4-way 4-way
Steps, Fan/Cool 3/4 3/4
Airflow Direction Control(up&down) Auto Auto
Airflow Direction Control(left&right) Manual Manual
Remocon Type Wireless LCD Wireless LCD
Setting Temperature Range, Cooling Mode 64~86°F 64~86°F
Temperature Increment 2°F 2°F
Auto Operation(electronic control) Yes Yes
Self Diagnosis Yes Yes
Timer 24hr, On/Off 24hr, On/Off
Sleep Operation Yes Yes
Healthy Dehumidification Mode Yes Yes
Restart Delay minutes 3 3
Refrigerant(R-22) Charge g(oz) 740(26.1) 630(22.2)
Power cord AWG #: P*mm214:3*2.5 14:3*2.5
Fuse or breaker Capacity A 15A 20A
Connecting Cable AWG #: P*mm216:4*0.75 18:4*0.75
Connecting Tube Liquid Side mm(in) 6.35(1/4) 6.35(1/4)
(ø. Socket Flare) Gas Side mm(in) 12.7(1/2) 12.7(1/2)
Length, std m(ft) 7.62(25) 7.62(25)
Additional Drain Hose(Outer Dia.) mm(in) 19(6/8) 19(6/8)
Dimensions Indoor mm 570*568*137 570*568*137
(WxHxD) in 22.4*22.3*5.4 22.4*22.3*5.4
Outdoor mm 770*540*245 770*540*245
in 30.3*21.3*9.6 30.3*21.3*9.6
Net Weight Indoor kg(lbs) 7(15.4) 7(15.4)
Outdoor kg(lbs) 33(72.8) 33(72.8)

-7-
Pipe Hole Fix Hole
Hanger Hole
H
WD
MODEL
DIM Unit
W mm(inch) 570(22.4)
H mm(inch) 568(22.3)
D mm(inch) 137(5.4)
INDOOR UNIT
Dimensions
(1) Indoor Unit (9K, 12K)

-8-
(2) Outdoor Unit (9K, 12K)
WL2
L3
L1
D
H
L4
L5
Gas side
(3-way valve)
Liquid side
(2-way valve)
MODEL All Models
DIM unit
W mm(inch) 770(30.3)
H mm(inch) 540(21.3)
D mm(inch) 245(9.6)
L1 mm(inch) 287(11.3)
L2 mm(inch) 64(2.5)
L3 mm(inch) 518(20.4)
L4 mm(inch) 10(0.4)
L5 mm(inch) 100(3.9)

Refrigeration Cycle Diagram
-9-
For installation over rated, *a proper quantity of refrigerant should be added for each meter.
Ex) 9K: When installed at a distance of 15m, 148g of
refrigerant should be added.
(15-7.62) x 20g = 148g
INDOOR UNIT
HEAT
EXCHANGER
(EVAPORATOR) HEAT
EXCHANGER
(CONDENSER)
COMPRESSOR
GAS SIDE
CAPILLARY TUBE
LIQUID SIDE
OUTDOOR UNIT
• Cooling Only Models
MODEL
9K, 12K
(Cooling Only)
Pipe size(Diameter:ø) Piping length Elevation
Gas Liquid Rated Max Rated Max
1/2" 1/4" 7.62m(25ft) 15m(50ft) 5m(16ft) 7m(23ft)
a proper quantity of refrigerant
9K, 12K 20g

Wiring Diagram
-10-
BL
BL
BK
BK
FUSE
3.15A
FUSE
2.5A
ZNR
CN-DC/DC
RY-COMP
34
MAIN P.C.B
YL
MOTOR
RD
BL
BR
BL
RD
BR
BL
TERMINAL
BLOCK
TO INDOOR UNIT
POWER
INPUT
3854A30077ZOUTDOOR WIRING DIAGRAM
RD BR BK BL
G
H
F
C
CAPACITOR
CN-TRANS
TRANSFORMER
T/B 1
CN - POWER
BR
BR YL
O.L.P
COMP.
S
RC
(N)(
L)
(1) Indoor Unit
(2) Outdoor Unit (
9K, 12K)
9K, 12K (Cooling Only Models, Cooling & Heating Models)

Operation Details
1. MAIN UNIT FUNCTION
•DISPLAY
1) C/O Model
Operation Indicator
•ON while in appliance operation, OFF while in appliance pause.
•Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)
Sleep Timer Indicator
•ON while in sleep timer mode, OFF when sleep timer cancel or appliance operation pause.
Timer Indicator
•ON while in timer mode (on/off), OFF when timer mode is completed or canceled.
Comp. Running Incidator
•While in appliance operation, ON while in outdoor unit compressor running, OFF while in compressor off.
2) H/P Model
Operation Indicator
•ON while in appliance operation, OFF while in appliance pause.
•Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)
Sleep Timer Indicator
•ON while in sleep timer mode, OFF when sleep timer cancel or appliance operation pause.
Timer Indicator
•ON while in timer mode (on/off), OFF when timer mode is completed or canceled.
Defrost Indicator
•OFF except when hot start during heating mode operation or while in defrost control.
■Cooling Mode Operation
•When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan
stop.
•When it reaches 0.5°C above the setting temp, they start to operate again.
Compressor ON Temp ➲ Setting Temp+0.5°C
Compressor OFF Temp ➲Setting Temp-0.5°C
•While in compressor running, operating with the airflow speed set by the remote control. While in compressor
not running, operating with the low airflow speed regardless of the setting.
■Healthy Dehumidification Mode
•When the dehumidification operation input by the remote control is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.
26°C ≤Intake Air Temp ➲ 25°C
24°C ≤Intake Intake Air Temp<26°C➲ Intake Air Temp-1°C
18°C ≤Intake Intake Air Temp<24°C➲ Intake Air Temp-0.5°C
Intake Air Temp<18°C➲ 18°C
-11-

•While in compressor off, the indoor fan repeats low airflow speed and pause.
•While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidifica-
tion operation and 4-min compressor off repeat.
Compressor ON Temp. ➲Setting Temp+0.5°C
Compressor OFF Temp. ➲Setting Temp-0.5°C
•In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
■Heating Mode Operation
•When the intake air temp reaches +3°…above the setting temp, the compressor is turned off. When below
the setting temp, the compressor is turned on.
Compressor ON Temp. ➲Setting Temp.
Compressor OFF Temp. ➲Setting Temp.+3°C
•While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C, when above 28°C , it
operates with the low or setting airflow speed. When the indoor pipe temp is between 20°C and 28°C, it oper-
ates with Super-Low(while in sleep mode, with the medium airflow speed).
•While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C, when above 35°C , it
operates with the low airflow speed.
•If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the
outdoor fan is turned on/off according to the indoor pipe temp.
•While in defrost control, both of the indoor and outdoor fans are turned off.
■Defrost Control
•While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing,
reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.
•After 40 min heating mode operation, at 4 min interval, whether to carry out defrost control or not and the time
of defrost control are determined according to the following conditions.
1) While in heating mode operation, the maximum of the indoor pipe temperature is measured and it is com-
pared with the present indoor pipe temperature to get the difference of the indoor pipe temperatures (=the
maximum temperature of indoor pipe ? the present temperature of indoor pipe), according to which, whether
to carry out defrost control or not is determined.
2) According to the need of defrost control shown above and the elapsed time of heating mode operation at that
moment, the defrost control time is determined.
3) When the determined time of defrost control is below 7 min, heating mode operation continues without carry-
ing out defrost control. According to the procedure stated above, the determination is made again. When the
defrost control time is 7 min or longer, defrost control is then carried out.
•While in defrost control, the minimum temp of the indoor pipe is measured and it is compared with the present
temp of the indoor pipe to get the difference of the indoor pipe temperatures (=the present temperature of the
indoor pipe ? the minimum temperature of the indoor pipe). When the difference is 5°C or higher, defrost con-
trol is completed and heating mode operation is carried out.
•While in defrost control, if the defrost time determined before the start of defrost control is completed, defrost
control stops and heating mode operation is carried out regardless of the above condition.
•When the indoor pipe temp is 42°C or above, defrost control is not carried out even if the condition is one of
the defrost conditions above.
•While in defrost control, the compressor is on and the indoor fan, the outdoor fan, and the 4 way valve are off.
-12-

-13-
■ Fuzzy Operation (C/O Model)
•According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting
temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.
Compressor ON Temp ➲Setting Temp + 0.5°C
Compressor OFF Temp ➲Setting Temp + 0.5°C
•At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C ≤Intake Air Temp ➲25°C
24°C ≤Intake Air Temp < 26°C ➲Intake Air Temp + 1°C
22°C ≤Intake Air Temp < 24°C ➲Intake Air Temp + 0.5°C
18°C ≤Intake Air Temp < 22°C ➲Intake Air Temp
Intake Air Temp<18°C➲ 18°C
•When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
•While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the
temperature.
■Fuzzy Operation (H/P Model)
•When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since
the operation off, the operation mode is selected.
•When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only
the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air
temp at that moment as follows.
24°C ≤Inatake Air Temp ➲Fuzzy Operation for Cooling
21°C ≤Inatake Air Temp<24°C➲Fuzzy Operation for Dehumidification
Inatake Air Temp<21°C ➲Fuzzy Operation for Heating
•If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10
sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.
1) Fuzzy Operation for Cooling
•According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below
the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor
is turned on.
Compressor ON Temp ➲Setting Temp +0.5°C
Compressor OFF Temp ➲Setting Temp + 0.5°C
•At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C≤Intake Air Temp ➲25°C
24°C≤Intake Air Temp<26°C ➲Intake Air Temp + 1°C
22°C≤Intake Air Temp<24°C ➲Intake Air Temp + 0.5°C
18°C≤Intake Air Temp<22°C ➲Intake Air Temp
Intake Air Temp<18°C ➲18°C
•When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
•While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the tem-
perature.

-14-
2) Fuzzy Operation for Dehumidification
•According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below
the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor
is turned on.
Compressor ON Temp ➲Setting Temp + 0.5°C
Compressor OFF Temp ➲Setting Temp+0.5°C
•At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C ≤Intake Air Temp ➲25°C
24°C ≤Intake Air Temp<26°C ➲Intake Air Temp+1°C
22°C ≤Intake Air Temp<24°C ➲ Intake Air Temp+0.5°C
18°C ≤Intake Air Temp<22°C ➲Intake Air Temp
Intake Air Temp<18°C ➲18°C
•When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
•While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in
dehumidification operation.
3) Fuzzy Operation for Heating
•According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C or more above
the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.
Compressor ON Temp ➲Setting Temp
Compressor OFF Temp ➲Setting Temp + 3°C
•At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
20°C≤Intake Air Temp ➲Intake Air Temp + 0.5°C
Intake Air Temp<20°C ➲20°C
•When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
•While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to the
intake air temperature and the setting temperature.
■ Airflow Speed Selection
•The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input of the airflow
speed selection key on the remote control.
■On-Timer Operation
•When the set time is reached after the time is input by the remote control, the appliance starts to operate.
•The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.
•If the appliance is operating at the time set by the timer, the operation continues.

-15-
■ Off-Timer Operation
•When the set time is reached after the time is input by the remote control, the appliance stops operating.
•The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.
•If the appliance is on pause at the time set by the timer, the pause continues.
■ Off-Timer ↔On-Timer Operation
•When the set time is reached after the on/off time is input by the remote control, the on/off-timer operation is
carried out according to the set time.
■ Sleep Timer Operation
•When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote control while in appli-
ance operation, the operation of the appliance stops.
•While the appliance is on pause, the sleep timer mode cannot be input.
•While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperature
increases by 1°C. After another 30 min elapse, it increases by 1°C again.
•When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set to the
low.
•When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to
the medium.
■ Chaos Swing Mode
•By the Chaos Swing key input, the louvers vane automatically operate with the Chaos Swing or they are fixed
to the desired direction.
•While in Chaos Swing mode, the angles of cooling and heating cycle operations are different.
■ Jet Cool Mode Operation (C/O Model)
•If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates.
•In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
•In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C
•When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
•During the JET COOL function at any moment, the A/C starts to blow the cool air with side louvers closed at
extremely high speed for 30 minutes setting the room temp. automatically to 18°C.
CLOSED
OPEN
< Cooling Mode >
CLOSED
OPEN
< Heating Mode >

-16-
■ Jet Cool Mode Operation (H/P Model)
•While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the other
mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.
•In the Jet Cool mode, the indoor fan is operated at super-high speed for 60 min at cooling mode operation.
•In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C.
•When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
•During the JET HEAT function at any moment, the A/C starts to blow the hot air with side louvers closed at
extremely high speed for 60 minutes setting the room temp. automatically to 30°C.
■Forced Operation
•Operation procedures when the remote control can't be used.
•The operation will be started if the power button is pressed.
•If you want to stop operation, re-press the button.
•While in forced operation, the key input by the remote control has no effect and the buzzer sounds 10 times to
indicate the forced operation.
■Test operation
• During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room tem-
perature and resets in 18±1 minutes.
• During test operation, if remote controller signal is received, the unit operates as remote controller sets.
If you want to use this operation, open the front panel upward and Press the power button let it be pressed for
about 3 seconds.
• If you want to stop the operation, re-press the button.
■Auto restart
• In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.
■Remote Control Operation Mode
•When the remote control is selected by the slide switch on the main unit, the appliance operates according to
the input by the remote control.
■Protection of the evaporator pipe from frosting
•If the indoor pipe temp is below 0°C in 7 min. after the compressor operates without any pause while in cool-
ing cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor
evaporator pipe from frosting.
•When the indoor pipe temp is 7°C or higher after 3 min. pause of the compressor, the compressor and the
outdoor fan is turned on according to the condition of the room temperature.
■Buzzer Sounding Operation
•When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds.
•When the appliance-pause key is input by the remote control, the long "beep—" sounds.
•When a key is input by the remote control while the slide switch on the main unit of the appliance is on the
forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that the
remote control signal cannot be received.
Heat pump Model
Cooling Model Room Temp. ≥24°C21°C ≤Room Temp. < 24°C Room Temp. < 21°C
Operating mode Cooling Cooling Healthy Dehumidification Heating
Indoor FAN Speed
High High High High
Setting Temperature
22°C22°C23°C24°C

Display Function
-17-
Self-diagnosis Function
3sec 3sec 3sec
(once)
Error
Code
1
Error Display LED
(Indoor body operation LED) Error contents
•Indoor room temperature
thermistor open/short
•Indoor pipe temperature
thermistor open/short.
•Indoor Thermistor
assembly check
SVC check point
1. Heating Model 2. Cooling Model
•Cooling, Soft Dry, Fan, Heating •Cooling, Soft Dry, Fan
•Sleep Mode •Sleep Mode
•Timer Mode •Timer Mode
•Hot-start, Defrost
Operation Indicator
Timer Indicator
Sleep Timer Indicator
Defrost Indicator
Operation Indicator
Timer Indicator
Sleep Timer Indicator
Compressor on Indicator
OUTDOOR

Installation
1. Installation of indoor, Outdoor unit
-18-
9K 1/2" 1/4" 7.5 7 15 20
(24.6ft) (23ft) (50ft)
12K 1/2" 1/4" 7.5 7 15 20
(24.6ft) (23ft) (50ft)
Read completely, then follow step by step.
1) Select the best location
1. Indoor unit
■Do not have any heat or steam near the unit.
■Select a place where there are no obstacles in front
of the unit.
■Make sure that condensation drainage can be con-
veniently routed away.
■Do not install near a doorway.
■Ensure that the space around the left and right of
the unit is more than 50cm(19.7”). The unit should
be installed as high on the wall as possible, allowing
a minimum of 10cm(3.9”) from ceiling.
■Use a stud finder to locate studs to prevent unnec-
essary damage to the wall.
2. Outdoor unit
■If an awning is built over the unit to prevent direct
sunlight or rain exposure, make sure that heat radia-
tion from the condenser is not restricted.
■Ensure that the space around the back and sides is
more than 10cm(3.9”).
The front of the unit should have more than
70cm(27.5”) of space.
■Do not place animals and plants in the path of the
warm air.
■Take the air conditioner weight into account and
select a place where noise and vibration are mini-
mum.
■Select a place so that the warm air and noise from
the air conditioner do not disturb neighbors.
■Rooftop Installations:
If the outdoor unit is installed on a roof structure, be
sure to level the unit. Ensure the roof structure and
anchoring method are adequate for the unit loca-
tion. Consult local codes regarding rooftop mount-
ing.
2) Piping length and elevation
More than 10cm(3.9")
More than 50cm(19.7")
More than 2m(6.6ft) More than 50cm(19.7")
More than 10cm(3.9") More than 10cm(3.9")
More
than 60cm(24")
More than 60cm(24")
More than 70cm(28")
Pipe Size
Capacity
(Btu/h)
GAS LIQUID
Max.
length
A (m)
Additional
Refrigerant
(g/m)
Max.
Elevation
B(m)
Standard
Length
(m)
In case more than 5m(16.4ft)
•Capacity is based on standard length and maximum allowance
length is on the basis of reliability.
•Oil trap should be installed every 5~7 meters(16.4~23ft).
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
A
Oil trap
Outdoor unit
Indoor unit
B
CAUTION
Install the indoor unit on the wall where the height from the floors
more than 2m(6.6ft).
CAUTION

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1. Open panel front
■First,Pull the grille bottom, then remove screws(2
pieces), and close grille bottom again.
■The moment of lifting the both lower parts of panel
front, you can hear sound this panel came out, In
this time panel front is separated
■After pull down this panel a bit, and separate con-
necting wire with product.
Pipe hole
Panel Front
Connector
2. Cover pipe and cover side remove
■Remove two screws(for fixing cover pipe)
■Pull up the cover side of desired connecting direc-
tion, then cover side is separated.
■In case connecting direction is left or right, path
through the hole of cover side.
When connecting pipe path through rear wall, don’t
remove the hole.
3. Drain hose junction
■Remove the rubber stopple of desired drain direc-
tion.
■As the following picture, Insert drain hose in the
handle of drain pan, and join drain hose and con-
necting hose.
rubber cap
Only one
desiring direction
Connecting
part
Adhesive
Drain
hose
3) Preparing work for Installation
After removing the pipe hole, cut the burr for safety.
CAUTION

-20-
Plastic anchors
INSTALLATION GUIDE MAP
10mm(0.39")
INSTALLATION GU
INSTAIIATIONGUIDEMAP
1. Put an Installation Guide Map on the desired
surface.
2. Make a hole with diameter of 6mm(0.24") and
depth of 30-35mm(1.18"~1.38") when piercing
a screw point.
3. Drive the fore plastic anchors into drilled
points.
4. Hang the hole of product at the upper screws.
(In this time, Remove the map)
(Falling attention)
5. Check the fixed product with light power.
6. Look at suited horizon by horizontal meter on
the horizontal setting line, and Fix lightly
the map by adhesive tape.
7. Drill the piercing part for connecting pipe as
diameter 50mm(1.97").
(In case of piercing rear surface)
Refer to No. 5 on this page when making a hole in the wall.
8. First, Drive the two points of the upper parts
by screws.
(Leave 10mm(0.39") for hanging product)
9. Drive the lower parts after facing the hole of
product with plastic anchors, and fix
completely the upper screws.
In case of nothing wrong in the matter, connect
the pipe and the wire.
(Installation manual reference)
Horizontality
INSTALLATION GUIDE MAP
Plastic anchors
INSTALLATIONGUIDEMAP
INSTALLATION GUIDE MAP
Hanger hole
(Rear side of
product)
5) Preparing work for installation
1. Drill a hole in the wall
■Drill the piping hole with a Ø50mm(1.97”) hole core
drill. Drill the piping hole at either the right or the left
with the hole slightly slanted to the outdoor side.
5-7mm
(0.2~0.3")
Indoor WALL Outdoor
4) Sticking the installation guide map and fixing Indoor unit