LG LM-3061H2L/M User manual

Multi Type Room Air Conditioner
SERVICE MANUAL
MODEL: LM-3061H2L/M
LM-3061B2L
LM-3061C2L/M

Functions...................................................................................................................................... 3
Product Specifications................................................................................................................ 5
Dimensions....................................................................................................................................7
Refrigeration Cycle Diagram....................................................................................................... 9
Wiring Diagram .......................................................................................................................... 10
Operation Details ....................................................................................................................... 11
Display Function........................................................................................................................ 17
Self-diagnosis Function ............................................................................................................ 17
Installation.................................................................................................................................. 18
Disassembly of the parts(Indoor unit) ..................................................................................... 37
2-way, 3-way Valve ..................................................................................................................... 39
Cycle Troubleshooting Guide ....................................................................................................43
Electronic Parts Troubleshooting Guide.................................................................................. 44
Electronic Control Device ......................................................................................................... 51
Schematic Diagram.................................................................................................................... 53
Exploded View and Replacement Parts List............................................................................ 56
- 2 -
Contents

- 3 -
Functions
• Room temperature sensor. (THERMISTOR)
• Maintains the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 seconds at the starting.
• Restarting is inhibited for approx. 3 minutes.
• High, Med, Low, Chaos
--- Lights up in operation
--- Lights up in Sleep Mode
--- Lights up in Timer Mode
--- Lights up in Deice Mode(for Heat pump model)
--- Lights up in Compressor operation(for Cooling model)
• 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)
Health Dehumidification operation
• Both the indoor and outdoor fan
stops during deicing.
• The indoor fan stops until the
evaporator piping temperature will be
reached at 28°C.
Sleep Mode Auto Control
Natural Air Control by CHAOS Logic
Airflow Direction Control
OUT
DOOR
Deice (defrost) control (Heating)
Hot-start Control (Heating)

- 4 -
Remote Controller
JET COOL
Healthy Dehumidification Operation Mode ( )
Operation Mode Selection
(Cooling
model only) (Heating
model only)
Cooling Operation Mode ( ) Heating Operation Mode ( ) Auto Operation Mode ( )
Sleep Operation
Fan Operation Mode
Room, Temperature Display
Setting the Time or Timer
Airflow Direction Control
Operation ON/OFF
Temperature Setting
TEMPERATURE LOWHIGH
Timer Selection
ON OFF
Timer Setting
SET
Timer Cancel
CANCEL
Reset
Fan Speed Selection
(Low) (Med) (High) (CHAOS)
: (High: 39°C LOW : 11°C)
Down to 18°C
Up to 30°C
Cooling
: 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.
Down to 16°C
Up to 30°C
Heating

- 5 -
Product Specifications
28,500(7,182) 17,500(4,410)11,000(2,772)
28,500(7,182) 17,500(4,410)11,000(2,772)
4.2 2.5 1.7
1Ø, 220-240V, 50Hz
Indoor 13 9
Outdoor 58
Indoor 44 +1 38+1
Outdoor 57 +1
3,050 1,950 1,250
2,750 1,850 1,100
13 8.5 5.5
12.5 8.2 4.8
9.3 9.0 8.8
3.0 2.8 2.9
Indoor 22 13
Outdoor 80
Indoor 1,080 x 314 x 181 888 x 287 x 170
Outdoor 870 x 800 x 320
Indoor 11 9
Outdoor 83
1,400 1,080
O
L.C.D Wireless
Liquid 1/4"(6.35)
Gas 1/2"(12.7)
O
O
Operation A-Unit Only
A-Unit + B-Unit B-Unit Only
Unit
Item
Cooling Capacity
Heating Capacity
Moisture Removal ℓ/h
Power Source ø, V, Hz
Air Circulation m3/min
Noise Level dB(A)
Input W
A
E.E.R. Btu/h.w
C.O.P. -
Motor Output W
Dimensions(W x H x D) mm
Net. Weight kg
Refrigerant(R-22) g
Airflow Direction Control(Up & Down)
Remocon Type
Service Valve
Sleeping Operation
Drain Hose
Cooling
Heating
Cooling
Heating
Cooling
Heating
Runnig
Current
Btu/h(kcal/h)
1. LM-3061H2L/M, LM-3061B2L

- 6 -
28,500(7,182) 17,500(4,410)11,000(2,772)
4.2 2.5 1.7
1Ø, 220-240V, 50Hz
Indoor 13.0 9.0
Outdoor 58
Indoor 44 +1 38+1
Outdoor 57 +1
3,050 1,950 1,250
13.0 8.5 5.5
9.3 9.0 8.8
Indoor 22 13
Outdoor 80
Indoor 1,080 x 314 x 181 888 x 287 x 170
Outdoor 870 x 800 x 320
Indoor 11.0 9.0
Outdoor 67
1,400 950
O
L.C.D Wireless
Liquid 1/4"(6.35)
Gas 1/2"(12.7)
O
O
Operation A-Unit Only
A-Unit + B-Unit B-Unit Only
Unit
Item
Cooling Capacity Btu/h(kcal/h)
Moisture Removal ℓ/h
Power Source ø, V, Hz
Air Circulation m3/min
Noise Level dB(A)
Input W
Running Current A
E.E.R. Btu/h.w
Motor Output W
Dimensions(W x H x D) mm
Net. Weight kg
Refrigerant(R-22)(at 7.5m)
g
Airflow Direction Control(Up & Down)
Remocon Type
Service Valve
Sleeping Operation
Drain Hose
2. LM-3061C2L/M

1. Indoor Unit
- 7 -
Dimensions
D
H
W
Installation plate
Tubing hole cover
W
H
Tubing hole cover
Tubing hole cover
Installation plate
D
W mm 1,080 888
H mm 314 287
D mm 181 170
18k 12k
MODEL
DIM
( 18k ) ( 12k )

- 8 -
W
L5L6 L7 L8
L3
H
D
L1
L2
L4
L9
Gas side
3-way valve
Liquid side
2-way valve
L10L10L10
2. Outdoor Unit
W mm 870
H mm 800
D mm 320
L1 mm 370
L2 mm 25
L3 mm 775
L4 mm 25
L5 mm 546
L6 mm 160
L7 mm 160
L8 mm 64
L9 mm 76.5
L10 mm 50
LM-3061H2L/M, LM-3061B2L, LM-3061C2L/M
MODEL
DIM

- 9 -
Refrigeration Cycle Diagram
Indoor Unit Outdoor Unit
Heat
Exchanger
B-Unit
4- WAY
Valve-B Heat
Exchanger
Comp-B
2- WAY
Valve
3- WAY
Valve
Heat
Exchanger
A-Unit
4- WAY
Valve-A
Comp-A
2- WAY
Valve
3- WAY
Valve
Pipe Size (Diameter : inch)
Max.
piping length
(m)
Max.
piping elevation
(m)
Gas Liquid
1/2" 1/4" 10~15 5~7
ex) Capillary
Cooling & Deice
Heating
A-UNIT B-UNIT
CAPILLARY TUBE
LIQUID SIDE
2-WAY VALVE
GAS SIDE
3-WAY VALVE
HEAT
EXCHANGER
(EVAPORATOR)
HEAT
EXCHANGER
(CONDENSER)
COMPRESSOR
B
COMPRESSOR
A
1. LM-3061H2L/M, LM-3061B2L(Cooling & Heating Model)
2. LM-3061C2L/M(Cooling Model)

3854A20023B
INDOOR WIRING DIAGRAM
CN-DISP1
CN-U/D
FUSE
AC250V/T2A
CN-TH
SSR
SH-CAPA.
BR
YL
OR
BK
CN-POWER CN-FAN
ZNR
THERMISTOR
FORCED
OPERATION
AUTO
RESTART
REMOTE
CONTROL
STEP
MOTOR
MOTOR
MAIN PCB
ASM
DISPLAY PCB ASM
TO OUTDOOR UNIT
PILLAR
TERMINAL
BR
BL YL
1(L)2(N)
3
OUTDOOR WIRING DIAGRAM
3854AP3911J
MAIN PCB ASSY
TO INDOOR UNIT
A-UNIT B-UNIT MAIN
POWER
TERMINAL
BLOCK
CN-TRANS
BK BK
BR BL
BL YL
BK BK
BK
BK
BK
BK
OR
HCF
YL
BK
BK
"A"
COMP
BL
BK
RD
RD
SR
CC
RBR
BK
YL
S
BK
BK T/B2
T/B1
T/B3
GN/YL
MOTOR
BK
7
433113 21
531 3 1
BK
WH
WH BK GN/YL
GN/YL
WH
CN-COM
CN-TH1 CN-TH2
CN-POWER
CN-SV
RY9 RY3
RY2
RY1
RY10
CN-FANCN-COMP
CAPA.
CAPA.
FUSE T3.15A
THERMISTOR
THERMISTOR
TRANS-
FORMER
OLP
"B"
COMP
1(L) 1(L)2(N) 1(L) 2(N)2(N) 33
A 4-WAY B 4-WAY
OPTION
3854A20023D
INDOOR WIRING DIAGRAM
CN-DISP1
CN-U/D
FUSE
AC250V/T2A
CN-TH1
SSR
SH-CAPA.
BR
YL
OR
BK
CN-TAB1
ZNR
CN-MOTOR
THERMISTOR
FORCED
OPERATION
AUTO
RESTART
REMOTE
CONTROL
STEP
MOTOR
MOTOR
MAIN PCB
ASM
DISPLAY PCB ASM
TO OUTDOOR UNIT
PILLAR
TERMINAL
BR
BL YL
GN/YL
1(L)2(N)
3
RY-COMP.
4
3
BK
RD
R
C
BR
RD
WH
A-UNIT
TO INDOOR UNIT
OUTDOOR WIRING DIAGRAM
3854A20023Q
B-UNIT MAIN POWER
1(L) 2(N) 3 3 2(N) 1(L) 1(L) 2(N)
BK RD BL
BL
BL
RD POWER
RELAY
OR
OR
MOTOR YLBK
O.L.P
T/B 3
T/B 4
T/B 1 T/B 2
C
R
FCH
SWH
BL
BR
BK
COMP
"B"
CAPACITOR
NO
NC C
3
6
1
7
8
BK
WH
BK
BK
TERMINAL
BLOCK
GN/YL
GN/YL
S
COMP
"A"
YL
CAPACITOR
- 10 -
Wiring Diagram
1. LM-3061H2L/M, LM-3061B2L
Indoor Unit Outdoor Unit
2. LM-3061C2L/M
Indoor Unit Outdoor Unit

1. MAIN UNIT FUNCTION
• DISPLAY
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 controller. While in com-
pressor not running, operating with the low airflow speed regardless of the setting.
■ Healthy Dehumidification Mode
•When the dehumidification operation input by the remote controller 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 Air Temp < 26°C => Intake Air Temp-1°C
18°C ≤Intake Air Temp < 24°C => Intake Air Temp-0.5°C
Intake Air Temp < 18°=> 18°C
•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°C 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 26°C , when above 28°C,
it operates with the low or setting airflow speed (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.
- 11 -
Operation Details

■ Defrost Control
•Defrost operation is controlled by timer and sensing temperature of outdoor pipe.
•The first defrost starts only when the outdoor pipe temperature falls below -6°C after 60 minutes passed from
starting of heating operation and more than 10 minutes operation of compressor.
•Defrost ends after 12 minutes passed from starting of defrost operation or after the outdoor fan operates within
max. 2 minutes 30 seconds when the outdoor pipe temperature rises over 12°C even if before 12 minutes.
•The second defrost starts only when the outdoor pipe temperature falls below -6°C after 60 minutes passed from
ending of the first defrost and more than 10 minutes operation of compressor.
■ Fuzzy Operation
•When any of operation mode is not selected like the moment of the power on 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 com-
pressor 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.
- 12 -

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 com-
pressor 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 controller.
■ On-Timer Operation
•When the set time is reached after the time is input by the remote controller, 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.
- 13 -

■ Off-Timer Operation
•When the set time is reached after the time is input by the remote controller, 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 controller, 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 controller while in
appliance 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 upper/lower vane automatically operates 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.
■ Chaos Natural Wind Mode
•When the Chaos Natural Wind mode is selected and then operated, the high, medium, or low speed of the
airflow mode is operated for 2~15 sec randomly by the Chaos Simulation.”
■ Jet Cool Mode Operation
•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 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.
•When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then
operated in order that the air outflow could reach further.
- 14 -

■ Auto Restarting Operation
•When the power is restored after a sudden power failure while in appliance operation, the mode before the
power failure is kept on the memory and the appliance automatically operates in the mode on the memory.
•The slide switch on the main unit of the appliance should be on the Auto Restarting position in order that the
Auto Restarting operation is available.
•Operation Mode that is kept on the memory
- State of Operation ON/OFF
- Operation Mode/Setting Temp/Selected Airflow Speed
- Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour)
■ Forced Operation
•To operate the appliance by force in case that the remote controller is lost, the forced operation selection
switch is on the main unit of the appliance to operate the appliance in the standard conditions.
•When the power is supplied while the slide switch is on the forced operation position, or when the slide
switch position is switched to the Auto Restarting (or test operation) position or switched from the remote
control position to the forced operation position while the power is on, the forced operation is carried out.
•When the slide switch position is switched from the forced operation position to the Auto Restarting position
or the remote control position, the forced operation is canceled and the appliance stops operating.
•The forced operation is carried out in cooling mode with the setting temperature 22°C and the high speed of
airflow.
•In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the opera-
tion condition is set according to the intake air temperature as follows.
24°C ≤Intake Air Temp => Cooling Mode Operation, 22°C, High Speed
21°C ≤Intake Air Temp < 24°C => Dehumidification Operation, 23°C, High Speed
Intake Air Temp < 21°C => Heating Mode Operation, 24°C, High Speed
•While in forced operation, the key input by the remote controller has no effect and the buzzer sounds 10
times to indicate the forced operation.
■ Test Operation Control
•To check the condition of the installation when installing the appliance, the appliance is operated at cooling
mode, high speed of airflow, compressor-on for 18 min without controlling the room temperature.
•Only when the slide switch on the main unit is switched from the remote control position to the test operation
position, test operation is carried out.
•When the slide switch position is switched to the remote control position while in test operation, the test
operation is canceled and the appliance is stopped. When switched to the forced operation position, the test
operation is canceled and the forced operation is carried out.
•While in test operation, a key can be input by the remote controller.
When a key (operation start/stop, operation mode selection, airflow speed selection, temperature control,
Jet Cool) is input by the remote controller, the test operation is canceled and the appliance is operated
according to the setting by the remote controller.
- 15 -

■ 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 controller.
■ 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 controller, the short “beep-beep-”sounds.
•When the appliance-pause key is input by the remote controller, the long “beep—” sounds.
•When a key is input by the remote controller 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.
■ Self Diagnosis Operation
Thermistor Error Indicator
•When the indoor pipe sensor or the room temperature sensor is open or is shorted, the error is indicated.
•To indicate the error, the operation LED (or the cooling LED) flashed at 3 sec interval.
•When the error is cleared, the LED stops flashing, the operation (or cooling) LED is on.
•While in appliance pause, the error is not indicated.
•Since the airflow quantity and speed are controlled by the adjustment of the vane angle using the Wind-up
effect, you can enjoy the natural and pleasant wind uniformly at any location in the room.
•Since the indoor outflow air is sucked again by the upper/lower vanes, the indoor temperature drop is mini-
mized and the pleasant humidity is maintained.
- 16 -

1. Heating Model
•Cooling, Soft Dry, Fan, Heating
•Sleep Mode
•Timer Mode
•Hot-start, Defrost
Self-diagnosis Function
■Error Indicator
•The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble.
•Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table.
•If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed.
•After error occurrence, if error is released, error LED is also released simultaneously.
•To operate again on the occurrence of error code 12, be sure to pull out power cord and then re-insert.
•Having or not of error code is different from Model.
- 17 -
Display Function
Operation Indicator
Sleep Timer Indicator
Sleep Timer Indicator
Deice Indicator
1(once)
(once)
(twice)
(twice)
(5times)
(once)
(twice)
(3times)
3sec 3sec
3sec
3sec 3sec
3sec
3sec 3sec 3sec
3sec
3sec
2
3
5
12
Error
Code Error LED
(Indoor body operation LED) Error contents SVC check point
•Indoor suction temperature
thermistor open/short.
•Indoor pipe temperature
thermistor open/short. •Indoor TH ass'y check
•Outdoor TH ass'y
check
•Resetting of remocon
operating mode
•Communication
line/circuit check
•Primarily check
refrigerant pressure
•Connecting pipe check
•Connecting cable check
•Outdoor suction temperature
thermistor open/short.
•Outdoor pipe temperature
thermistor open/short.
•Abnormal operation of multi
product.
(Simultanueous operation of
cooling and heating)
•Misconnection of connecting
cables
•Poor communication

- 18 -
Installation
Front
Right Rear right
Rear left
Down right
Left
More than 5 cm
More than eye-level
More than
5 cm
More than
5 cm
More than 10 cm More than 10 cm
More than 70 cm
A
B
Indoor unit
Outdoor unit
1) Selection of the best location
1. Indoor unit
•There should not be any heat source or steam
near the unit.
•There should not be any obstacles to prevent
the air circulation.
•A place where air circulation in the room will be
good.
•A place where drainage can be easily obtained.
•A place where noise prevention is taken into
consideration.
•Do not install the unit near the door way.
•Ensure the spaces indicated by arrows from
the wall, ceiling, fence, or other obstacles.
2. Outdoor unit
•If an awning is built over the unit to prevent
direct sunlight or rain exposure, be careful that
heat radiation from the condenser is not
restricted.
•There should not be any animals or plants
which could be affected by hot air discharged.
•Ensure the spaces indicated by arrows from
the wall, ceiling, fence, or other obstacles.
3. Piping length and the elevation
Pipe Size
GAS LIQUID
Max. piping
length
A (m)
Max.
Elevation
B (m)
1/2" 1/4" 10~15 5~7
(1) Installation of Indoor, Outdoor unit

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2) Indoor Unit Installation
The mounting wall should be strong and solid
enough to protect it from the vibration.
1. Mount the installation plate on the wall with
four Type "A" screws.
(If mounting the unit on the concrete wall, consid-
er using anchor bolts.)
•Always mount the Installation plate horizontally
by aligning the marking-off line by means of the
thread and a level.
2. Drill the piping hole with 70mm dia. holecore
drill.
•Line according to the arrows marked on lower
the left and the rght side of the Installation Plate.
The meeting point of the extended line is the
center of the hole.
•Drill the piping hole at either the right or the left
and the hole should be slightly slant to the out-
door side.
Type "A" screw
Installation Plate
marking-off line
Thread
Weight
ø70mm ø70mm
5~7mm
A
A
A
A
The lower left and the right side of
Installation Plate
12k, 18k BTU
Left rear piping Right rear piping
Indoor Outdoor
Wall

- 20 -
1) Preparation of pipings
1. Cut the pipes and the cable.
•Use the accessory piping kit or the pipes pur-
chased locally.
•Measure the distance between the indoor and
the outdoor unit.
•Cut the pipes a little longer than the measured
distance.
•Cut the cable 1.5m longer than the length of the
pipe.
2. Remove burrs.
•Remove burrs from cut edges of pipes.
•Turn the pipe end toward down to avoid the
metal powder entering the pipe.
Caution:
If burrs are not removed, they may cause a gas
leakage.
3. Flaring the pipes.
•Insert the flare nuts, mounted on the connection
ports of both indoor and outdoor unit, onto the
copper pipes. Some refrgerant gas may leak,
when the flare nuts are removed from the indoor
unit, as some gas is charged to prevent the
inside of the pipe from rusting.
•Fit the copper pipe end into the Bar of flare tool
about 0~0.5mm higher. (See illustration)
•Flare the pipe ends.
4. Tape the flaring portion to protect it from the
dust or damages.
90
"A"
When properly flared, the internal surface flare will
evenly shine and be of even thickness.
Since the flare part comes into contact with the connec-
tors, carefully check the flare finish.
Pipe cutter
Slanted Rough
Pipe
Point down
Reamer
Bar
Bar
Copper pipe Clamp handle Red arrow mark
Handle
Yoke
Cone
"
A"; ø12.7 mm (1/2")
→ 0~0.5 mm
ø9.52 mm (3/8")
→ 0~0.5 mm
ø6.35 mm (1/4")
→ 0~0.5 mm
= Improper flaring =
Inclined Surface
damaged Cracked Uneven
thickness
(2) Piping and Drainage of Indoor Unit