LG LA180CP Schematic

SERVICE MANUAL

Room Air Conditioner

MODELS : LA180CP

Contents

Details of 2005 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 .............................................................................................................................. 32

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 2005 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

-4-

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 dur­ing 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

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)

Operation indication lamps

-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°C

Heating

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

LA180CP

Power Supply ø, V, Hz 1, 208/230, 60
Cooling Capacity BTU/h 18,000/18,000
Input W 1,900/1,900
Running Current A 9.0/9.0
COMP. Locked Rotor AMP. A 47
E.E.R BTU/hW 9.5/9.5
Air Circulation m3/min(cfm) 11.9(420)
Moisture Removal l/h(pts/hr) 2.5(5.3)
Noise Level Indoor, High dB(A)±3 45
(Sound Med dB(A)±3 42

Pressure, 1m) Low dB(A)±3 39

Outdoor, Max dB(A)±3 53

Features Temperature Control Thermistor

Air Deflection 4-way
Steps, Fan/Cool 3/4
Airflow Direction Control(up&down) Auto
Airflow Direction Control(left&right) Manual
Remocon Type Wireless LCD
Setting Temperature Range, Cooling Mode 64~86°F
Temperature Increment 2°F
Auto Operation(electronic control) Yes
Self Diagnosis Yes
Timer 24hr, On/Off
Sleep Operation Yes
Healthy Dehumidification Mode Yes

Restart Delay minutes 3
Refrigerant(R-22) Charge g(oz) 1,280(45.2)
Power cord AWG #: P*mm

2

14:3*2.5
Fuse or breaker Capacity A 20
Connecting Cable AWG #: P*mm

2

18:4*0.75
Connecting Tube Liquid Side mm(in) 6.35(1/4)
(ø. Socket Flare) Gas Side mm(in) 15.88(5/8)

Length, std m(ft) 7.5(24.6)
Additional Drain Hose(Outer Dia.) mm(in) 19(6/8)
Dimensions Indoor mm 928*522*147
(WxHxD) in 36.5*20.6*5.8

Outdoor mm 870*655*320

in 34.3*25.812.6

Net Weight Indoor kg(lbs) 16(35.3)

Outdoor kg(lbs) 58(127.9)

-7-

522

928

147

Pipe Hole Fix Hole

MODEL

DIM Unit

W mm(inch) 928(36.5)

H mm(inch) 522(20.6)
D mm(inch) 147(5.8)

Indoor Unit

Dimensions

(1) Indoor Unit

-8-

W

L6 L5 L7 L8

D

L1

L2

L9L10

L3L4

H

Gas side
3-way valve

Liquid side
3-way valve

(2) Outdoor Unit (18K)

MODEL

OUTDOOR UNIT

DIM

W mm(inch) 870(34.3)

H mm(inch) 655(25.8)

D mm(inch) 320(12.6)
L1 mm(inch) 370(14.6)
L2 mm(inch) 25(1.0)
L3 mm(inch) 630(24.8)
L4 mm(inch) 25(1.0)
L5 mm(inch) 546(21.5)
L6 mm(inch) 162(6.4)
L7 mm(inch) 162(6.4)
L8 mm(inch) 54(2.1)
L9 mm(inch) 74.5(2.9)

L10 mm(inch) 79(3.1)

Refrigeration Cycle Diagram

-9-

For installation over rated, *a proper quantity of refrigerant should be added for each meter.

Ex) 18K: When installed at a distance of 30m, 450g of

refrigerant should be added.
(30-7.5) x 20g = 450g

INDOOR UNIT

HEAT
EXCHANGER
(EVAPORATOR)

HEAT
EXCHANGER
(CONDENSER)

COMPRESSOR

GAS SIDE

CAPILLARY TUBE

LIQUID SIDE

OUTDOOR UNIT

• Cooling Only Models

MODEL

18K

(Cooling Only)

Pipe size(Diameter:ø) Piping length Elevation

Gas Liquid Rated Max Rated Max

5/8" 1/4" 7.5m(24.6ft) 30m(98.4ft) 5m(16ft) 7m(23ft)

a proper quantity of refrigerant

18K 20g

Wiring Diagram

-10-

(1) Indoor Unit

(2) Outdoor Unit (

18K)

18K (Cooling Only 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

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• While in compressor off, the indoor f an 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 oper­ates 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 con­trol 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 tem­perature.

-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 star t 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 tem­perature 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°C 22°C 23°C 24°C

-17-

Display Function

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

Installation

1. Installation of indoor, Outdoor unit

-18-

Read completely , then f ollo w 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 con­veniently 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 unnec­essary 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 radia­tion 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 mini­mum.

■ 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 loca­tion. Consult local codes regarding rooftop mount­ing.

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")

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

18K 5/8" 1/4"

7.5 15 30
20

(24.6ft)

(49.2ft) (98.4ft)

Pipe Size

Capacity

(Btu/h)

GAS LIQUID

Max.

length

A

(m)

Additional

Refrigerant

(g/m)

Max.

Elevation

B

(m)

Standard

Length

(m)

-19-

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 con­necting wire with product.

Pipe hole

Side cover

Panel F ront

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 direc­tion.

■ As the following picture, Insert drain hose in the
handle of drain pan, and join drain hose and con­necting 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-

4) How to fix installation plate

The wall you select should be strong and solid enough
to prevent vibration

Mount the installation plate on the wall with
type "A" screws. If mounting the unit on a concrete
wall, use anchor bolts.

■ Mount the installation plate horizontally by aligning
the centerline using a level.

5) Preparing work for installation

1. Drill a hole in the wall

• Drill the piping hole with a ø50mm hole core drill.
Drill the piping hole at either the right or the left with
the hole slightly slanted to the outdoor side.

Installation Plate

240mm

(19.4")

240mm

(19.4")

60mm

(2.4")

60mm

(2.4")

Type "A" screw

Ø 70mm

(2.8")

Ø 70mm

(2.8")

5-7mm

(0.2~0.3")

Indoor

WALL

Outdoor

Measure the wall and mark the centerline. It is also
important to use caution concerning the location of
the installation plate-routing of the wiring to power
outlets is through the walls typically. Drilling the hole
through the wall for piping connections must be
done safely.

B

A

-21-

2. Flaring Work and Connection of Piping

1) Flaring work

Main cause for refrigerant leakage is due to defect in
the flaring work. Carry out correct flaring work using the
following procedure.

1. Cut the pipes and the cable.

•

Use the piping kit accessory or pipes purchased 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 pipe length.

2. Burr removal

• Completely remove all burrs from the cut cross sec­tion of pipe/tube.

• Put the end of the copper tube/pipe in a downward
direction as you remove burrs in order to avoid drop­ping burrs into the tubing.

3. Putting nut on

• Remove flare nuts attached to indoor and outdoor
unit, then put them on pipe/tube having completed
burr removal.
(not possible to put them on after flaring work)

4. Flaring work

• Firmly hold copper pipe in a die in the dimension
shown in the table above.

• Carry out flaring work using flaring tool as shown
below.

5. Check

• Compare the flared work with figure below.

• If flare is noted to be defective, cut off the flared sec­tion and re-flare it.

2) Connection of piping Indoor

• Preparing the indoor unit's piping and drain hose for
installation through the wall.

1. Route the indoor tubing and the drain hose in the
direction of rear left or right.

Copper

pipe

90°

Slanted Uneven Rough

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Inclined

Inside is shiny without scratches

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Pipe

Reamer

Point down

Flare nut

Copper tube

mm inch mm
Ø6.35 1/4 0~0.5
Ø9.52 3/8 0~0.5
Ø12.7 1/2 0~0.5

Ø15.88 5/8 0~1.0

Outside diameter A

Drain hose

-22-

2.

Tape the tubing, drain hose, and the connecting
cable. Be sure that the drain hose is located at the
lowest side of the bundle. Locating at the upper side
can cause drain pan to overflow inside the unit.

NOTE: If the drain hose is routed inside the room,

insulate the hose with an insulation material* so that
dripping from "sweating"(condensation) will not damage
furniture or floors.
*Foamed polyethylene or equivalent is recommended.

3. Indoor unit installation

• Hook the indoor unit onto the upper portion of the
installation plate.(Engage the two hooks of the rear
top of the indoor unit with the upper edge of the instal­lation plate.) Ensure that the hooks are properly seat­ed on the installation plate by moving it left and right.

4. Connecting the pipings to the indoor unit and drain
hose to drain pipe.

• Align the center of the pipes and sufficiently tighten
the flare nut by hand.

• Tighten the flare nut with a wrench.

• When extending the drain hose at the indoor unit,
install the drain pipe.

5. Wrap the insulation material around the connecting
portion.

• Overlap the connection pipe insulation material and
the indoor unit pipe insulation material. Bind them
together with vinyl tape so that there is no gap.

• Wrap the area which accommodates the rear piping
housing section with vinyl tape.

• Bundle the piping and drain hose together by wrap­ping them with vinyl tape for enough to cover where
they fit into the rear piping housing section.

Connecting
cable

Gas side piping

Liquid side piping

Drain hose

Loop

Indoor unit tubing Flare nut Pipes

Wrench

Indoor unit tubing

Open-end wrench (fixed)

Connection pipe

Flare nut

Vinyl tape(narrow)

Adhesive

Drain pipe

Indoor unit drain hose

Plastic bands

Insulation material

Vinyl tape(narrow)

Connection
pipe

Connecting cable

Vinyl tape
(wide)

Wrap with vinyl tape

Indoor
unit pipe

Pipe

Drain hose

Connecting

cable

mm inch kg.m
Ø6.35 1/4 1.8
Ø9.52 3.8 4.2
Ø12.7 1/2 5.5

Ø15.88 5/8 6.6
Ø19.05 3/4 6.6

Outside diameter Torque

Wrap with vinyl tape

Drain hose

Pipe

Vinyl tape(wide)

-23-

3) Connection of the pipes-Outdoor

1. Align the center of the pipings and sufficiently
tighten the flare nut by hand.

2. Finally, tighten the flare nut with torque wrench
until the wrench clicks.

• When tightening the flare nut with torque wrench,
ensure the direction for tightening follows the arrow on
the wrench.

Installation Information (For right piping)

• Good case

For right piping. Follow the instruction below.

■ Press on the upper side of clamp and
unfold the tubing to downward slowly.

• Bad case

■ Following bending type from left to right could cause
problem of pipe damage.

CAUTION

mm inch kg.m
Ø6.35 1/4 1.8
Ø9.52 3/8 4.2
Ø12.7 1/2 5.5

Ø15.88 5/8 6.6
Ø19.05 3/4 6.6

Outside diameter

Torque

Outdoor unit

Liquid side piping
(Smaller diameter)

Gas side
piping
(Bigger
diameter)

Torque wrench

-24-

3. Connecting The Cable Between Indoor Unit and Outdoor Unit

1

Indoor Unit Outdoor Unit

2
3
4

1
2
3
4
5
6

G

To
branch
circuit

Ground

Power supply

a

L1

*

L2

Connecting cable(Low voltage)

b

Terminal

(4P)

Terminal

(6P)

Outdoor unit

Wiring Diagram

Terminal block

Over 5mm

(2")

Cover control

Conduit panel

Connecting

cable

Power supply

cord

*

L1 is neutral for 115V models.

1) Connection of the cable

1. Remove the cover control from the unit
by loosening the 3 screws.

2. Dismount caps on the conduit panel.

3. Temporarily mount the conduit tubes on
the conduit panel.

4. Properly connect both the power supply
and low voltage lines to the
corresponding terminals on the terminal
block.

5. Ground the unit in accordance with local
codes.

6. Be sure to size each wire allowing
several inches longer than the required
length for wiring.

7. Use lock nuts to secure the conduit
tubes.

1. shows field wiring.

2. Separately wire the high and low voltage line.

3. Use heat-proof electrical wiring capable of

withstanding temperatures up to 167°F.

4. Use outdoor and waterproof connection cable
rated more than 300V for the connection between
indoor and outdoor unit.
(For example, Type SJO-WA)

• Be sure to comply with local codes while
running the wire from the indoor unit to
the outdoor unit(size of wire and wiring
method, etc).

• Every wire must be connected firmly.

• No wire should be allowed to touch

refrigerant tubing, the compressor or any
moving parts.

Connector trade size for this unit is 1/2".
Refer to "How to connect wiring to the
terminals" for instructions on connecting
depending on the wire type you are using.

WARNING

NOTE

Power Supply

Model

Power source

18K 1ø, 208/230V 14 18 20A

AWG(MIN.)

ⓐⓑ

Fuse or breaker

Capacity

NOTE

-25-

G

Terminal
block

Cap
(Remove)

Clamp cord

Lock nut

Conduit panel

Loop

Round
terminal

Screw with
special washer

Screw with
special washer

Round terminal

Terminal plate

Wire

Wire

Round terminal

Insulation

Strip 25mm(15/16")

Strip 10mm(3/8")

Solid wire

Cap(Reuse)

Taping

(for sealing)

Low voltage line

(connecting cable)

Power supply line
(1ø, 115V, 208/230V)

Hole

(for low voltage line)

Strand wire

2) Connection method of the connecting
cable(Example)

(1) Dismount two-caps on the conduit panel.
(2) Make a hole appropriate for the passage of

connection cable through on cap by tool.

(for low voltage line)
(3) Pass the connecting cable through the hole.
(4)

Properly connect the cable on the terminal block.
(5) Fix the connection cable with clamp cord

provided on the unit not to have strain at the

terminal when the connection cable is pulled

outside up to a 35 pound weight.
(6) Wind the vinyl tape round the connecting cable

for sealing between the surface of the

connection cable and cap.
(7) Mount the taped part of cable on the cap.
(8) Finally, mount the holed cap with the

wound cable on the conduit panel.

When connecting each power wire to the
corresponding terminal, follow instructions "How to
connect wiring to the terminals" and fasten the wire
tightly with the fixing screw of the terminal plate.

How to connect wiring to the terminals

■ For solid core wiring (or F-cable)
(1) Cut the wire end with a wire cutter of wire-

cutting pliers, then strip the insulation to expose

the solid wire about 25mm(15/16")
(2) Using a screwdriver, remove the terminal

screw(s) on the terminal plate.
(3) Using pliers, bend the solid wire to from a loop

suitable for the terminal screw.
(4) Shape the loop wire properly, place it on the

terminal plater and tighten securely with the

terminal screw using a screwdriver.

■ For strand wiring
(1) Cut the wire end with a wire cutter or wire-

cutting pliers, then strip the insulation to expose

the strand wiring about 10mm(3/8").
(2) Using a screwdriver, remove the terminal

screw(s) on the terminal plate.
(3) Using a round terminal fastener or pliers,

securely clamp each stripped wire end with a

round terminal.
(4) Position the round terminal wire, and replace

and tighten the terminal screw using a

screwdriver.

Loose wiring may cause the terminal to
overheat or result in unit malfunction. A fire
hazard may also exist. Therefore, be sure all
wiring is tightly connected.

WARNING

-26-

4. checking the Drainage and forming the pipings

2) Form the piping

1. Form the piping by wrapping the connecting por­tion of the indoor unit with insulation material and
secure it with two kinds of vinyl tapes.

■ If you want to connect an additional drain hose, the
end of the drain outlet should be routed above the
ground. Secure the drain hose appropriately.

2. In cases where the outdoor unit is installed below
the indoor unit perform the following.

■ Tape the piping, drain hose and connecting cable
from down to up.

■ Secure the tapped piping along the exterior wall
using saddle or equivalent.

Taping

Drain hose

Pipings

Connecting cable

Trap is required to prevent water
from entering into electrical parts.

Seal small openings
around pipings with a
gum type sealer.

3. In cases where the Outdoor unit is installed above
the Indoor unit perform the following.

■ Tape the piping and connecting cable from down to
up.

■ Secure the taped piping along the exterior wall.
Form a trap to prevent water entering the room.

■ Fix the piping onto the wall by saddle or equivalent.

Seal a small opening
around the pipings
with gum type sealer.

Trap

Trap

1) Checking the drainage

1. To check the drainage.

■ Pour a glass of water on the evaporator.

■ Ensure the water flows through the drain hose of the

indoor unit without any leakage and goes out the
drain exit.

2. Drain piping

■ The drain hose should point downward for easy
drain flow.

■ Do not make drain piping.

Downward slope

Do not raise

Accumulated
drain water

Tip of drain hose
dipped in water

Air

Waving

Water
leakage

Water
leakage

Ditch

Less than
50mm gap

Water
leakage

-27-

CAUTION

CAUTION

Air

Conditioner

Circuit Breaker

Use a circuit
breaker or time
delay fuse.

Main power source

If a power plug is not to be used, provide a circuit breaker between power source and the
unit as shown below.

3) Connect the cable to the indoor unit

1. Connect the wires to the terminals on the
control board individually according to the
outdoor unit connection.

• Ensure that the color of the wires of outdoor unit

and the terminal No. are the same as those of
indoor unit respectively.
(Refer to Wiring diagram on page10.)

• Be sure to refer to the wiring diagram label
inside the grille and carry out the correct
field wiring.
Wrong wiring can cause the unit to misoperate
to result in a fire hazard.

• Check local electrical codes and any specified
wiring instructions or limitations.

WARNING

Connecting cable

-28-

To avoid nitrogen entering the refrigerant system in a
liquid state, the top of the cylinder must be higher than
its bottom when you pressurize the system. Usually,
the cylinder is used in a vertical standing position.

1) Air purging

Air and moisture remaining in the refrigerant system
have undesirable effects as indicated below.

• Pressure in the system rises.

• Operating current rises.

• Cooling(or heating) efficiency drops.

• Moisture in the refrigerant circuit may freeze and block
capillary tubing.

• Water may lead to corrosion of parts in the refrigera­tion system.

Therefore, the indoor unit and tubing between the
indoor and outdoor unit must be leak tested and evacu­ated to remove any noncondensables and moisture
from the system.

2) Air purging with vacuum pump

1. Preparation

• Check that each tube(both liquid and gas side tubes)
between the indoor and outdoor units have been prop­erly connected and all wiring for the test run has been
completed. Remove the service valve caps from both
the gas and the liquid side on the outdoor unit. Note
that both the liquid and the gas side service valves on
the outdoor unit are kept closed at this stage.

2. Leak test

• Connect the manifold valve(with pressure gauges)
and dry nitrogen gas cylinder to this service port with
charge hoses.

• Pressurize the system to no more than 150 P.S.I.G.
with dry nitrogen gas and close the cylinder valve
when the gauge reading reached 150 P.S.I.G. Next,
test for leaks with liquid soap.

• Do a leak test of all joints of the tubing(both indoor
and outdoor) and both gas and liquid side service
valves.
Bubbles indicate a leak. Be sure to wipe off the soap
with a clean cloth.

• After the system is found to be free of leaks, relieve
the nitrogen pressure by loosening the charge hose
connector at the nitrogen cylinder. When the system
pressure is reduced to normal, disconnect the hose
from the cylinder.

Lo Hi

Indoor unit

Outdoor unit

Manifold valve

Charge hose

Nitrogen gas
cylinder(in vertical
standing position)

Pressure
gauge

5. Air Purging

Be sure to use a manifold valve for air purging. If it is
not available, use a stop valve for this purpose. The
"Hi" knob of the manifold valve must always be kept
close.

CAUTION

CAUTION

-29-

3. Evacuation

• Connect the charge hose end described in the pre­ceding steps to the vacuum pump to evacuate the tub­ing and indoor unit.
Confirm the "Lo" knob of the manifold valve is open.
Then, run the vacuum pump.
The operation time for evacuation varies with tubing
length and capacity of the pump. The following table
shows the time required for evacuation.

• When the desired vacuum is reached, close the "Lo"
knob of the manifold valve and stop the vacuum
pump.

4. Finishing the job

• With a service valve wrench, turn the valve stem of
liquid side valve counter-clockwise to fully open the
valve.

• Turn the valve stem of gas side valve counter-clock­wise to fully open the valve.

• Loosen the charge hose connected to the gas side
service port slightly to release the pressure, then
remove the hose.

• Replace the flare nut and its bonnet on the gas side
service port and fasten the flare nut securely with an
adjustable wrench. This process is very important to
prevent leakage from the system.

• Replace the valve caps at both gas and liquid side
service valves and fasten them tight.

This completes air purging with a vacuum pump.
The air conditioner is now ready to test run.

(1) Remove the caps from the 2-way and 3-way

valves.
(2) Remove the service-port cap from the 3-way valve.
(3) To open the 2-way valve tur n the valve stem coun-

terclockwise approximately 90°, wait for about 2~3

sec, and close it.
(4) Apply a soap water or a liquid neutral detergent on

the indoor unit connection or outdoor unit connec-

tions by a soft brush to check for leakage of the

connecting points of the piping.
(5) If bubbles come out, the pipes have leakage.

Soap water method

Required time for evacuation when 30 gal/h vacuum pump is

used

10 min. or more 15 min. or more

If tubing length is less than 10m

(33 ft)

if tubing length is longer than 10m

(33 ft)

Gas side

Liquid side

Cap

Hexagonal wrench

2-way valve

(Open)

3-way valve

(Close)

Indoor unit

Pressure
gauge

Open

Outdoor unit

Manifold valve

Lo Hi

Close

Vacuum pump

-30-

1. First, Check the side cover assembly exactly, Fix
power cord in the bottom groove of cover side
left.

2. Assemble connecting lead wire with controller
and first fix the upper part of panel front, then
match the lower part of panel front

3. Drive three screws.

Panel F ront

Connector

6. Panel Front Assembly

-31-

1. Check that all tubing and wiring have been properly
connected.

2. Check that the gas and liquid side service valves are
fully open.

1. Prepare remote control

1. Remove the battery cover
by pulling it according to the
arrow direction.

2. Insert new batteries making
sure that the (+) and (–) of
battery are installed correctly.

3. Reattach the cover by

pushing it back into position.

NOTE:

• Use 2 AAA(1.5volt) batteries. Do not use recharge-

able batteries.

• Remove the batteries from the remote control if the

system is not going to be used for a long time.

2. Settlement of outdoor unit

• Anchor the outdoor unit with a bolt and nut(ø10mm)

tightly and horizontally on a concrete or rigid mount.

• When installing on the wall, roof or rooftop, anchor the

mounting base securely with a nail or wire assuming
the influence of wind and earthquake.

• In the case when the vibration of the unit is conveyed

to the hose, secure the unit with an anti-vibration
bushing.

3. Evaluation of the performance

Operate unit for 15~20 minutes, then check the system
refrigerant charge:

1. Measure the pressure of the gas side service valve.

2. Measure the temperature of the intake and discharge
of air.

3. Ensure the difference between the intake tempera­ture and the discharge is more than 8°C(46°F) (Cool­ing) or (Heating).

4. For reference; the gas side pressure of optimum con­dition is as below.(Cooling)

NOTE: If the actual pressure is higher than shown, the

system is most likely over-charged, and charge
should be removed. If the actual pressure are
lower than shown, the system is most likely
undercharged, and charge should be added.

The air conditioner is now ready for use.

Bolt

Tubing connection

Discharge air

Discharge
temperature

Intake temperature

7. Test Running

R-22 35°C (95°F) 4~5kg/cm2G(56.8~71.0 P.S.I.G.)

Outside ambient

TEMP.

Refrigerant

The pressure of the gas side

service valve.

This is performed when the unit is to be relocated
or the refrigerant circuit is serviced.

Pump Down means collecting all refrigerant in the
outdoor unit without loss in refrigerant gas.

CAUTION:

Be sure to perform Pump Down procedure with the
unit cooling mode.

Pump Down Procedure

1. Connect a low-pressure gauge manifold hose to
the charge port on the gas side service valve.

2. Open the gas side service valve halfway and purge
the air from the manifold hose using the refrigerant
gas.

3. Close the liquid side service valve(all the way in).

4. Turn on the unit's operating switch and start the
cooling operation.

5. When the low-pressure gauge reading becomes 1
to 0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close the
gas side valve stem and then quickly turn off the
unit. At that time, Pump Down has been completed
and all refrigerant gas will have been collected in
the outdoor unit.

PUMP DOWN

-32-

Operation

Name and Function-Remote Control

The remote control transmits the signals to the system.

START/STOP BUTTON

Operation starts when this button is pressed and
stops when the button is pressed again.

OPERATION MODE SELECTION BUTTON

Used to select the operation mode.

ROOM TEMPERATURE SETTING BUTTONS

Used to select the room temperature.

INDOOR FAN SPEED SELECTOR

Used to select fan speed in four steps
low, medium, high and CHAOS.

JET COOL/HEATING

Used to start or stop the speed cooling/heating.
(speed cooling/heating operates super high fan speed
in cooling/heating mode)

CHAOS SWING BUTTON

Used to stop or start louver movement and set the
desired up/down airflow direction.

ON/OFF TIMER BUTTONS

Used to set the time of starting and stopping operation.

TIME SETTING BUTTONS

Used to adjust the time.

TIMER SET/CANCEL BUTTON

Used to set the timer when the desired time is obtained and to
cancel the Timer operation.

SLEEP MODE AUTO BUTTON

Used to set Sleep Mode Auto operation.

AIR CIRCULATION BUTTON

Used to circulate the room air without cooling or heating.

ROOM TEMPERATURE CHECKING BUTTON

Used to check the room temperature.

RESET BUTTON

Used prior to resetting time or after replacing batteries.

2nd F Button

Used prior to using modes printed in blue at the bottom of buttons.

1

2

345

678

9

10

11

12

13

14

AUTO CLEAN

ON

OFF

CANCEL

SET

1

3

5

4

9

10

14

7

2

8

13

11

6

12

Cooling Operation

Auto Operation

Healthy Dehumidification Operation

Heating Operation

•

Cooling Model( ), Heat Pump Model( )

Flip-up door
(opened)

Signal transmitter

Operation Mode

-33-

Disassembly of the parts (Indoor unit)

Warning :

Disconnect the unit from power supply before making
any checks.
Be sure the power switch is set to “OFF”.

1. To remove the Grille from the Chassis.

- Push mark[ ] on the grille bottom then pull it down
and remove 3 securing screws.

- Lift the both lower parts of panel front.

- After pull down this panel a bit, separate connecting
wire with product.

2. To remove the Control Box.

- Before removing the control box, be sure to
disconnect the wires from PWB.

- Pull the cover control out from the control box
and disconnect other wires.

- Remove securing screws.

- Pull the control box out from the chassis carefully.

CN-TH1CN-UDCN-DC/DC

CN-LR2

CN-LR1

CN-MOTOR 1 (LEFT)

CN-MOTOR 2 (RIGHT)

Panel Front

Connector

∆

-34-

3. To remove the Evaporator.

- Remove 1 screws securing the evaporator.

- Pull the evaporator out from the chassis carefully.

4. Before removing the Turbo Fan.

- Remove the securing screws from the chassis.

- Pull the pipe cover, top cover and the air guide.

5. To remove the Motor.

- Remove the securing bolt from the motor shaft.

- Pull the fan out from the motor shaft.

- Remove 4 screws securing motor mount from the
chassis and lift up the motor mount and the bracket.

Top Cover

Air Guide

Pipe Cover

Bolt

Motor Mount

Bracket

Turbo Fan

2-way, 3-way Valve

2-way Valve (Liquid Side) 3-way Valve (Gas Side)

Shaft position Shaft position Service port

Closed Closed Closed

(with valve cap) (with valve cap) (with cap)

Open Closed Open

(counter-clockwise) (clockwise) (push-pin or with

vacumm pump)

Open Open Closed

(with valve cap) (with valve cap) (with cap)

Closed Open Open

(clockwise) (counter-clockwise) (connected manifold

gauge)

Open Open Open

(with charging

cylinder)

Open Open Open

(with charging

cylinder)

Open Open

Open Open

Works

Shipping

Air purging
(Installation)

Operation

Pumping down
(Transfering)

Evacuation
(Servicing)

Gas charging
(Servicing)

Pressure check
(Servicing)

Gas releasing
(Servicing)

1.

2.

3.

4.

5.

6.

Valve cap

Open position
Closed position

Pin

Service
port

Service
port cap

To outdoor unit

Flare nut

To
piping
connection

To outdoor unit

Hexagonal wrench (4mm)

Open position
Closed position

To
piping
connection

Flare nut

-35-

Open

(with charging cylinder)

Open

(with charging cylinder)

1. Air purging

Required tools : hexagonal wrench, adjustable

wrench, torque wrenches, wrench to
hold the joints, and gas leak
detector.

The additional gas for air purging has been charged
in the outdoor unit.
However, if the flare connections have not be done
correctly and there gas leaks, a gas cylinder and the
charge set will be needed.

The air in the indoor unit and in the piping must be
purged. If air remains in the refrigeration pipes, it will
affect the compressor, reduce to cooling capacity, and
could lead to a malfunction.

• Procedure

(1) Recheck the piping connections.
(2) Open the valve stem of the 2-way valve

counterclockwise approximately 90°, wait 10
seconds, and then set it to closed position.

– Be sure to use a hexagonal wrench to operate

the valve stem.

(3) Check for gas leakage.

– Check the flare connections for gas leakage.

(4) Purge the air from the system.

– Set the 2-way valve to the open position and

remove the cap from the 3-way valve’s service
port.

– Using the hexagonal wrench to press the valve

core pin, discharge for three seconds and then
wait for one minute. Repeat this three times.

(5) Use torque wrench to tighten the service port

nut to a torque of 1.8kg.cm.

(6) Set the 3-way valve to the back seat.
(7) Mount the valve stem nuts to the 2-way and 3-

way valves.

(8) Check for gas leakage.

– At this time, especially check for gas leakage

from the 2-way and 3-way valve’s stem nuts,
and from the service port nut.

Caution

If gas leakage are discovered in step (3) above,
take the following mesures :

If the gas leaks stop when the piping connections
are tightened further, continue working from step (4).
If the gas leaks do not stop when the connections
are retightened, repair the location of the leak,
discharge all of the gas through the service por t,
and then recharge with the specified amount of
gas from a gas cylinder.

Service port nut:
Be sure, using a torque wrench to tighten the service port nut (after using the service port), so that it prevents the
gas leakage from the refrigeration cycle.

* CAUTION : Do not leak the gas in the air during Air purging.

Liquid side

Outdoor unit

3-way
valve

Gas side

Indoor unit

2-way
valve

Open

Clsed

-36-

2. Pumping down

• Procedure

(1) Confirm that both the 2-way and 3-way valves

are set to the open position.

– Remove the valve stem caps and confirm that

the valve stems are in the raised position.

– Be sure to use a hexagonal wrench to operate

the valve stems.

(2) Operate the unit for 10 to 15 minutes.

(3) Stop operation and wait for 3 minutes, then

connect the charge set to the service port of
the 3-way valve.

– Connect the charge hose with the push pin to

the service port.

(4) Air purging of the charge hose.

– Open the low-pressure valve on the charge set

slightly to air purge from the charge hose.

(5) Set the 2-way valve to the closed position.

(6) Operate the air conditioner at the cooling

cycle and stop it when the gauge indicates
1kg/cm2g.

(7) Immediately set the 3-way valve to the closed

position.

– Do this quickly so that the gauge ends up

indicating 3 to 5kg/cm2g.

(8) Disconnect the charge set, and mount the 2-

way and 3-way valve’s stem nuts and the
service port nut.

– Use torque wrench to tighten the service por t

nut to a torque of 1.8 kg.m.

– Be sure to check for gas leakage.

Lo

Closed

Purge the air

Outdoor unit

Indoor unit

Liquid side

Gas side

CLOSE

Open

2-Way
valve

3-Way
valve

CLOSE

-37-

1) Re-air purging

(Re-installation)

• Procedure

(1) Confirm that both the 2-way valve and the 3-

way valve are set to the closed position.

(2) Connect the charge set and a gas cylinder to

the service port of the 3-way valve.

– Leave the valve on the gas cylinder closed.

(3) Air purging.

– Open the valves on the gas cylinder and the

charge set. Purge the air by loosening the flare
nut on the 2-way valve approximately 45° for 3
seconds then closing it for 1 minute; repeat 3
times.

– After purging the air, use a torque wrench to

tighten the flare nut on the 2-way valve.

(4) Check for gas leakage.

– Check the flare connections for gas leakage.

(5) Discharge the refrigerant.

– Close the valve on the gas cylinder and

discharge the refrigerant until the gauge
indicates 3 to 5 kg/cm2g.

(6) Disconnect the charge set and the gas

cylinder, and set the 2-way and 3-way valves
to the open position.

– Be sure to use a hexagonal wrench to operate

the valve stems.

(7) Mount the valve stem nuts and the service

port nut.

– Use torque wrench to tighten the service por t

nut to a torque of 1.8 kg.m.

– Be sure to check for gas leakage.

* CAUTION:

Do not leak the gas in the air during Air
Purging.

Lo

Closed

OPEN

Closed

Gas cylinder

R22

Outdoor unit

Indoor unit

Liquid side

Gas side

CLOSE

2-Way
valve

3-Way
valve

-38-

2) Balance refrigerant of the 2-way, 3-way valves

(Gas leakage)

• Procedure

(1) Confirm that both the 2-way and 3-way valves

are set to the back seat.

(2) Connect the charge set to the 3-way valve’s

port.

– Leave the valve on the charge set closed.
– Connect the charge hose with the push pin to

the service port.

(3) Open the valve (Lo side) on the charge set

and discharge the refrigerant until the gauge
indicates 0 kg/cm2G.

– If there is no air in the refrigerant cycle (the

pressure when the air conditioner is not
running is higher than 1 kg/cm2G), discharge
the refrigerant until the gauge indicates 0.5 to 1
kg/cm2G. if this is the case, it will not be
necessary to apply a evacuatin.

– Discharge the refrigerant gradually; if it is

discharged too suddenly, the refrigeration oil
will also be discharged.

Lo

Open

Open

3-Way
valve

2-Way
valve

Gas side

CLOSEOPEN

Outdoor unit

Liquid side

Indoor unit

-39-

3. Evacuation

(All amount of refrigerant leaked)

• Procedure

(1) Connect the vacuum pump to the charge set’s

center hose

(2) Evacuation for approximately one hour.

– Confirm that the gauge needle has moved

toward -76 cmHg (vacuum of 4 mmHg or less).

(3) Close the valve (Lo side) on the charge set,

turn off the vacuum pump, and confirm that
the gauge needle does not move (approxima­tely 5 minutes after turning off the vacuum
pump).

(4) Disconnect the charge hose from the vacuum

pump.

– Vacuum pump oil.

If the vacuum pump oil becomes dirty or
depleted, replenish as needed.

Lo

Open

Open

Vacuum pump

2-Way
valve

Outdoor unit

Liquid side

Indoor unit

Gas side

3-Way
valve

CLOSE

OPEN

-40-

4. Gas Charging

(After Evacuation)

• Procedure

(1) Connect the charge hose to the charging

cylinder.

– Connect the charge hose which you dis-

connected from the vacuum pump to the valve
at the bottom of the cylinder.

– If you are using a gas cylinder, also use a scale

and revers the cylinder so that the system can
be charged with liquid.

(2) Purge the air from the charge hose.

– Open the valve at the bottom of the cylinder

and press the check valve on the charge set to
purge the air. (Be careful of the liquid
refrigerant). The procedure is the same if
using a gas cylinder.

(3) Open the valve (Lo side on the charge set and

charge the system with liquid refrigerant.

– If the system can not be charged with the

specified amount of refrigerant, it can be
charged with a little at a time (approximately
150g each time) while operating the air
conditioner in the cooling cycle; however, one
time is not sufficient, wait approximately 1
minute and then repeat the procedure
(pumping down-pin).

(4) Immediately disconnect the charge hose from

the 3-way valve’s service port.

– Stopping partway will allow the gas to be

discharged.

– If the system has been charged with liquid

refrigerant while operating the air conditioner
turn off the air conditioner before disconnecting
the hose.

(5) Mount the valve stem nuts and the service

port nut.

– Use torque wrench to tighten the service port

nut to a torque of 1.8 kg.m.

– Be sure to check for gas leakage.

\

This is different from previous procedures.
Because you are charging with liquid refrigerant
from the gas side, absolutely do not attempt to
charge with larger amounts of liquid refrigerant
while operating the air conditioner.

-41-

Indoor unit

Liquid side

Gas side

Check valve

Charging
cylinder

Lo

(1)

OPEN

CLOSE

Open

Outdoor unit

2-Way
valve

Open

3-Way
valve

1. Trouble analysis

1. Check temperature difference between intake and discharge air and operating current.

Temp. Difference

Operating Current

Temp. difference :approx. 0°F
Current :less than 80% of

rated current

Temp. difference :approx. 8°C(14°F)
Current :less than 80% of

rated current

Temp. difference :less than 8°C(14°F)
Current :less than 80% of

rated current

Temp. difference :over 8°C(14°F)

All amount of refrigerant leaked out.
Check refrigeration cycle.

Refrigerant leakage
Clog of refrigeration cycle
Defective compressor

Excessive amount of refrigerant

Normal

Notice:

Temperature difference between intake and discharge air depends on room air humidity. When the room air
humidity is relatively higher, temperature difference is smaller. When the room air humidity is relatively lower
temperature difference is larger.

2. Check temperature and pressure of refrigeration cycle.

Notice:

1. The suction pressure is usually 4.5~5.0 kg/cm

2

G at normal condition.

2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with
putty.

- 42 -

Cycle Troubleshooting Guide

Suction pressure

(Compared with the

normal value)

Temperature

(Compared with the

normal value)

Cause of Trouble Description

Higher

High

Defective compressor
Defective 4-way reversing valve

Excessive amount of refrigerant

High pressure does not quickly
rise at the beginning of operation.

Current is low.

Normal

Lower Higher

Insufficient amount of
refrigerant(Leakage)
Clogging

Current is low.
Current is low.

- 43 -- 43 -

2. Product does not operate at all.
(* Refer to Electronic Control Device drawing and Schematic diagram.)

Turn off Main Power

Turn on Main Power

Does "beeping" sound is made from the Indoor Unit?

Primarily, the operating condition of Micom is OK.

Check the voltage of po wer(About A C 208V/A C230V, 60Hz)

• Main power's voltage

• Voltage applied to the unit

• Connecting method of Indoor/Outdoor connecting

cable

• Check PWB Ass'y(Outdoor unit)

- Fuse

- Pattern damage

- Varistor(ZNRI)

Check the connection housing for contacting

• Connector related to CN-POWER

• Connector related to CN-FAN

• Connector contacting of Outdoor Fan/Compressor

• Display PWB Ass'y Check

• Connector related to CN-DC/DC

Check each load(Indoor/Outdoor Fan Motor,
Compressor, Stepping Motor) and contacting
condition of related connector(including connecting
cable of Indoor/Outdoor Unit)

PCB Board Operation Check

Items

• Power Transformer
(Outdoor unit)

- Input Voltage

- Output Voltage

• IC2(7812) Output
(Indoor/Outdoor unit)

• IC3(7805) Output
(Indoor/Outdoor unit)

• IC4(KIA7036, Reset IC)
OSC01B(4MHz)
(Indoor/Outdoor unit)

• Replace Trans

• Replace IC2

• Replace IC3

• Replace faulty parts

- About AC208V/230V±10% - Check the power voltage

- About AC17±3V

• DC +12V

• DC +5V

• Voltage of Outdoor unit Micom No. 8,

Voltage of Indoor unit Micom No. 43 and soldering
condition

Content Remedy

NO

YES

(After 10 seconds)

- 44 -

3. The product is not operate with the remote controller.

Turn on Main Power

While the compressor has been stopped, the compressor does not

operate owing to the delaying function for 3 minutes after stopped.

Caused by other parts except the remote controller

Cause by the remote controller

When the mark( ) is displayed in LCD screen, replace
battery .

Check the contact of CN-D1/D2 connector.

When the compressor stopped Indoor Fan is driven by a low speed.
At this point the wind speed is not controlled by the remote controller.
(When operated in the Sleeping Mode, the wind speed is set to the
low speed by force.)

Check DISP PWB Ass'y

- Voltage between CN-D2 - : DC +5V

When the detect switch(double k e y) inside the remote
controller door is fault, it is impossible to oper ate
temperature regulating( / ) and wind speed selecting.

Check the connecting circuit between the remote controller
MICOM (No. ) - R17(2Ω) - IR LED - Q1 - R16(2.2K Ω).

Check point

• Check the connecting circuit between PIN - R75(1K)

- C71(1000PF) - MICOM PIN

• Check Receiver Ass'y

- 45 -

4. Compressor/Outdoor Fan are unable to drive.

Turn on Main Power

Operate "Cooling Mode( )" by setting the desired temperature of the
remote controller is less than one of the indoor temperature by 2°F at least.

When in Fan Mode, Compressor/Outdoor Fan is stopped.

Check the sensor for indoor temperature is attached as close as to be
effected by the temperature of Heat Exchanger(EVA).

When the sensor circuit for indoor temperature and connector are in bad
connection or are not engaged, Compressor/Outdoor Fan is stopped.

• Check the related circuit of R02(12.1K), R04(6.2K), Micom (No.27)
(Indoor unit).

• Check the indoor temper ature sensor is disconnected or not(About 10kΩ/ at 25°C).

When the temperature around Outdoor PWB Ass'y is above 163°F the
compressor is stop and only Outdoor Fan is operating.

Turn off Main Power

• Check the electrical wiring diagram of outdoor side.

• Check the abnormal condition for the component of Compressor/Outdoor

Fan Motor.

Check Relay(RY - COMP) for driving compressor.

• When the power(About AC200V) is applied to the connecting wire terminal
support transferred to compressor, PWB Ass'y is normal.

• Check the circuit related to the relay(Outdoor unit).

Check point COMP ON COMP OFF

Between Micom(No.

DC5V DC0V

15) and GND

Between IC8(No. 16)

Below DC 1V

About DC12V

and GND IC0M(No.16)

(app)

- 46 -

5. When Indoor Fan does not operate.

Check connecting condition of the CN-MOTOR
CONNECTOR

Does the voltage of terminal of CN-DC/DC CONNECTOR in
Indoor unit corresponds to the values in the table of page 51?

Do the voltage of terminal of
CN-DC/DC CONNECTOR in
Outdoor unit corresponds to the
values in the table of page 51?

Check the patterns and the
conditions of outdoor unit
PWB Assy's.

Check the connecting
condition and disconnection
of connecting wires between
Indoor and Outdoor unit.

Check the pattern and the
condition of Indoor unit PWB
Ass'y.

Check the interference of Indoor Fan.

Does the voltage of each terminals of CN-MOTOR CONNECTOR in
Indoor unit corresponds to values in the Table of page 51?

Check the motor of Indoor Fan

Indoor Fan ma y be stopped in the Soft Dry Mode(change to the Cooling Operation Mode).
Indoor Fan is to be stopped when Indoor pipe(coil) termperature is lo wer than 79°F.
(At that times, Defrost indicator is turned on)

NO

YES

- 47 -

• Confirm that the Vertical Louver is normally geared with the shaft of
Stepping Motor.

• If the regular torque is detected when rotating the Vertical Louver with
hands Normal

• Check the connecting condition of CN-U/D, CN-L/R Connector

• Check the soldering condition(on PWB) of CN-U/D, CN-L/R Connector

Check the operating circuit of the Vertical Louver

• Confirm that there is DC +12V between pin (RED) of CN-U/D, CN-L/R
and GND.

• Confirm that there is a soldering short at following terminals.

- Between 62 , 61 , 60 and 59 of MICOM

- Between 57 , 56 , 55 and 54 of MICOM

- Between

51 ,

50 , 49 and 48 of MICOM

- Between

1 , 2 , 3 , 4 and 5 of CN-U/D, CN-L/R

If there are no problems after above checks

• Confirm the assembly conditions that are catching and interfering parts in
the rotation radial of the Vertical Louver

6. When Vertical Louver does not operate.

- 48 -

• The operation indicator of Indoor unit blinks five times.

• The red indicator of Outdoor unit blinks five times.

Check the connecting wires between Indoor and Outdoor unit for the
connecting error and the contacting condition.

Check the installation condition of outdoor unit.

Check for the communication error and the operating condition of product
after also operating with the remote controller, then taking above 2 minutes.

Apply the power again after about 10 seconds by the power of Outdoor unit
is off.

Check for the communication error and the operating condition of product
after also operating with the remote controller, then taking above 2 minutes.

Check the PWB assembly of Indoor and Outdoor unit.

Caution: If the connecting wires of Indoor and Outdoor unit are not connected within 2 minutes after the power

of Outdoor unit is applied, a communication error will occur. Therefore, the power should be applied
after connecting them.

7. When a comunication error occurs.

- 49 -

8. The phenomena in case of connecting error
INDOOR UNIT

Connector Type

Condition

Open and connecting error

Open

Open

Open

Open

Short between terminals

( and ) of ROOM-TH.

Short between terminals

( and ) of PIPE-TH.

Short between terminals

• The same as the phenomenon of Outdoor Unit.

• The up/down vane does not operate.

• The up/down vane does not smoothly operate.

• It does not operate with a remote controller.

• The operation indicator blinks once

(on for 0.5 second, off for 3 seconds).

• The compressor operates continuously regardless
of the setting temperature and the variation of room
temperature.

• The operation indicator blinks once
(on for 0.5 second, off for 3 seconds)

• Continuous operation

• The operation indicator blinks once.

• The compressor and the outdoor fan stop.

• The indoor fan speed is low.

• The indoor fan does not operate.

• The operation indicator of Indoor unit blinks 8 times.

CN-DC/DC

CN-MOTOR

CN-UD

CN-D1/D2

CN-TH

Blue
Black
Brown
Red

Phenomena

On for 0.5 second

Off for 3 seconds

- 50 -

OUTDOOR UNIT

Connector Type

Condition

OPEN

• PWB pattern is damaged when applying the power .

Connecting reversely

Connecting reversely

OPEN

OPEN

OPEN

OPEN

Connecting error

( )

Connecting error

( )

Connecting error

( )

Connecting error

( )

Connecting error

( )

Connecting error

( )

• All functions stop.

• The operation with the remote controller, forced and

test one do not operate.

• All functions stop.

• The operation with the remote controller, forced and

test one do not operate.

• The Indoor Fan does not operate.

• The signal of remote controller is inputted, but the

product does not operate.

• The RED indicator of outdoor unit and the operation

indicator of indoor one blinks 5 times after 2 minutes
with applying the power .

• No power for Indoor unit.

• The signal input of the remote controller and

operation of product is impossible.

• The thermal protector of the Power Trans operates
when let it alone for long time.

• The signal of the remote controller is inputted.

• The fuse and Q61 in the Outdoor unit are damaged

when the indoor fan is operated.

• No power for Indoor unit.

• The signal input of the remote controller and

operation of product is impossible.

• The RED indicator of the Outdoor unit blinks 5 times
after 2 minutes with applying the power.

• All functions stop.

• The operation with the remote controller , f orced and test

one do not operate.

• The only signal of remote controller operation/stop is

inputted, but the product does not operate.

• The RED indicator of outdoor unit blinks 5 times after 2

minutes with applying the power .

• The beep sound, such as "beep, beep, beep, beep,

beep", occurs periodically in Indoor unit.

• The signal input of a remote controller and operation of

product is impossible.

• The RED indicator blinks 5 times after 2 minutes with

applying the power .

• All functions stop or the compressor does not operate.

• The operation with the remote controller , f orced and test

one do not operate.

• All functions stop .

• The operation with the remote controller , f orced and test

one do not operate.

CN-POWER

RY-COMP

terminal

CN-TRANS

CN-FAN

The connecting

wire of CN-

DC/DC, and

Indoor and

Outdoor Unit

Blue
Black
Brown
Red

Phenomena

9. Voltage of Connectors according to Indoor Fan Speed

- 51 -

4

3

2

1

1 1

4

3

1 2 3 4

2 3 4 5 62

INDOOR

FAN

MOTOR

INDOOR PWB ASSY

Connecting wires

between Indoor

and Outdoor

Indoor

Connecting Terminal

Outdoor

Connecting Terminal

Input Power

POWER

TRANS

CN-POWER CN-TRANS

CN-DC/DC

RY-COMP

BK

BL BK BR RD

BK BL

BL

BK

BR

RD

+-

12

32

42

12

32

42

12

32

42

OUTDOO

R CN-DC/DC

INDOOR

CN-DC/DC

INDOOR

CN-MOTOR

No. of pins

MODELS

CONNELTORS

S-Hi Hi Med Low Off

32.0 27.8 24.1 21.2 0.0

5.0 5.0 5.0 5.0 5.0

0~5 0~5 0~5 0~5 5.0

0~12 0~12 0~12 0~12 0~12

17.0 17.0 17.0 17.0 17.0

32.0 27.8 24.1 21.2 0.0

0~12 0~12 0~12 0~12 0~12

17.0 17.0 17.0 17.0 17.0

32.3 28.1 24.4 21.3 0.0

18K

DC Voltage(±10%)

(1) MAIN PWB ASSY(Indoor Unit)

• PWB ASSY SVC PART LIST

- 52 -

Electronic Control Device

1 18K Cooling Model 6871A20387F 39K SHORT OPEN OPEN OPEN OPEN\

NO MODEL P/No.

OPTIONAL FUNCTION

OR1H OR2H OR3H OR4H OR5H OR6H

OJ1H, OJ2H, : SHORT

• TOP VIEW

• BOTTOM VIEW

1 18K Cooling Model 6871A10036T 91K 20K OPEN OPEN 3K X X X X X X

- 53 -

(2) MAIN PWB ASSY(Outdoor Unit)

• PWB ASSY SVC PART LIST

NO MODEL P/No.

OPTIONAL FUNCTION

OR4H OR5H OR6H OR7H OR 8H FUSE

RY -

HEATER

RY-4WA Y

RY -FAN

CN-

4WAY

CN­FAN

CN-TH

250V

3.15A

(3) DISPLAY PWB ASSEMBLY

• TOP VIEW

- 54 -

CN-CON(WH)

CN-CON(WH)

CN-D7

CN-D8

1

CN-D6

1

1

CN-D5

CN-D5

CN-D6

1

1

1

1

CN-D8

1

1

1

1

CN-D7

1

1

CN-D4

1

CN-D3

CN-D1

1

CN-D3

CN-D1

1

CN-D2

CN-D2

1

1

CN-D4

1

CN-12V(WH)

CN-SW(BL)

CN-12V(WH)

CN-SW(BL)

1

1

1

1

C01V

PWB ASM:6871A20363

PWB:6870A90126A

PWB ASM:6871A20363

PWB:6870A90126A

C02V

C01V

C02V

• BOTTOM VIEW

(4) SUB P.W.B ASSEMBLY

1. Indoor Unit

- 55 -

Schematic Diagram

OUTDOOR

48

46

47

44

42

43

40

38

39

41

36

35

34

33

37

45

15

1

2

2

1

23

18

16

17

19
20

21
22

28

24
25
26
27

29
30

31.
32

SLEEP

TIMER

ON/OFF

DEFROST

LED1

LED3

LED4

LED2

58

7

11

13

14

12

10

9

8

63

3

5

6

4

1

2

64

62
61
60
59

53

57
56
55
54

51

52

50
49

1

CN-HVB(BL)

3

2

HVB ASSY

132

12V

R93 10K

RXE250

POLY SW1

CN-MOTOR1(WH)

AVret

AVdd1
AVss

HVB PIN2

HVB

HVB PIN1

receiver

220

10V

IC01D

IC02D

103

C06D

7805

470uF

25V

C05D

+

O

50V

I

104

C04D

470uF

25V

O

C03D

+

7812

CN-12V(WH)

CN-CON(WH)

1111

C03L

3223
3

2

2

3

C04L

25V

RECEIVER

DISPLAY

Vcc

0.01

DC 5V

TEST

KEY

GND

Vout

1111

33

22

33

22

88 8 8

DC5V

L3

DC12V

10

13

12

11

CN-D1

7

8910

456

CN-D1(WH)

10

121311

11

12

1313

12

11

1010

10

777

10988

9

10

8

9

6544

5

6

5

6

4

DC12V

2200uF

35V

C01D

50V

C02D

104

I

+

MOTOR1

FG1

FAN

INDOOR

4321

4321

RXD

FG2

TXD

10K

R96

10K

R97

DC 5V

R95

2

-

+

10K

3

8

KA393

IC9-1

1

4

DC12V

R27H 20K

R28H 20K

12V

5V

5V

220

10V

C02L

10K

R12H

OJ01H

OJ02H

FG1

5

103

C13H

R11H

1K

50V

C03M

103

5V

678

DC 5V

R81A 1K

103

C81A

103

C91

4.7K

R92 10K

KA393

IC9-2

R90 1K

7

R91

6

5

+

-

R81 1K

103

C81

4

Q

SCD

321

FG

5V

S-Hi

OR6H

Hi

OR5H

Med

OR4H

103

C01M

2
2

STEPPING MOTOR

CN-D3

44

5

6

7

567

2

3

2

3

11

4

5

7

6

4

5

7

6

2

3

1

2

3

1

YL

2

3

PK BL

1

2

3

1

1

BL

4

OR

RD

5

1

4

5

STEPPING MOTOR

5

RD

OR

3

YL

PK

4

5

3

4

44 44

CN-D2

123

9

8

7

6

5

CN-D2(WH)

3211

2

3

123

999

5

6

7

8

5

6

7

8

6

5

7

8

3

2

1

SUB PCB ASM

CN-D1(WH)

1

2

3

1

2

3

1

2

3

12V

103

IC02M

KID65004AF

KID65004AF

IC01M

8

9

5V

R01G 220

R04G 220

R03G 220

R02G 220

R07G 220

R06G 220

R05G 220

5V

13

14

16

15

4

3

1

2

10

11

12

7

6

5

6

11

HVB

15

2

16

1

14

12

13

3

5

4

12V

9

10

8

7

0IMCRNE002M

uPD780023AGC

VssO

Vdd0

C02M

bdc

efg

a

Vss1

RESET

AVdd

X2X1INT1

INTO

CN-UD(BL)

1

1

YL

4

5

BL PK

5
4

3
2

OR
RD

3
2

STEPPING MOTOR

5V

CN-TH1(WH)

1

~

+

MOTOR2

CN-MOTOR2(YL)

2

INDOOR

24

FAN

3

FG2

43

1

1

63V

C07D

100uF

C01A

25V

0.01

104,50V

750

~

POLY SW2

RXE250

C92

1/4W

DC12V

R99

CN-DC/DC(BL)

33

44

1

2

1

2

R21H~R26H

R26H

F1

OR1HOR2H

Low

OR3H

F2

R22H

R24H

R25H

R23H

R21H

E2 1K

E3 1K

12.1K 1%

5V

214

3

214

3

R05H

10K

KIA7036P

KSC7536

5V

R02H

1%

1%

R04H

6.2K

12.1K

R02A 20K

3

5V

2

3.6V

1

IC01A

324

HVB PIN2

HVB PIN1

ROOM-TH

PIPE-TH

3

1

2

4

5

421

3

312

4

5

CN-LR1(WH)

CN-LR2(WH)

C01L

680pF

PKM13EPP-4002

CST-8.00MTW

5V

1M

R01B

TXD

RXD

OSC01B

50V

5.1K

R01L

1K

R01E

BZ01E

R02E 20

5V

receiver

1K

R02L

8

7

4

5

6

9

12

11

10

13

IC03M

KID65004AF

1

2

3

16

15

14

12V

L / R 2

STEP MOTOR

4

5

RD

312

BL PK

OR

YL

L / R 1

STEP MOTOR

OR

5

4

RD

YL

PK

4

3BL1

OR

STEPPING MOTOR

4

1

BLPK

3

2

YL

4

1

3

2

STEPPING MOTOR

3

PK

5

RD

BL

1

2

4

YL

OR

RD

5

3

5

1

2

4

5

CN-D8

CN-D5

CN-D6

CN-D7

2. Outdoor Unit

- 56 -

3

2

1

IC9

IC10

5

TLP521-1BL

TLP521-1BL

CN-DC/DC

4

2

3

1

470uF

20V

C05

4

2

3

1

8

2

3

220

VR71

R75

23.2K

1%

2K

100uF

25V

C73
+

4

R74

5.1K

8

7

29.4K

20K

34K

1.06K

102

1

-

+

-

D92

C92

50V

1N4148

8

104

IC7

5.23K 13K3K

3

+

14

9

HCP6068

56

R95

D91

1N4148

3

4

2

1

2

1

3

4

2.7K

R92

DC 5V

DC 5V

DC 5V

ZD81

5.1V

R91

1K

6.8K

1%

R82

R81

XXX

1%

NTC1

DKS-80-13

ZNR1

INR14D471K

35V

2200uF

+

103

C06

470uF

25V

C03

+

104

C02

50V

103

C04

C01

+

C66

63V

2SD2220

680uF

IC3

7805

100K

R68

5V

O

I

10K

R64

Q62

C67

100V

473K

+

R67

I

1.5K

7812

IC2

O

12V

103K

100V

C60

4 9

17V

102J,100V

C69C68

821K,1KV

C65

2

3

7

ST2

8

4

4

POWER TRANS

9 1

356 4

7

56 34

1

3

CN-TRANS

1

S1VB60

BD01

C62

1KV

222K

R65

D61 ERB44-08

30,1W

Q61

2SK2671

ZD61

12V

R66

200

101K

1KV

C63

68K

3W

R63

R62

1/2W

560K

100uF

+

C61

450V

AC230V/60Hz

FUSE

250V/3.15A

150-F06M

COIL1

CN-POWER

11

G4A-1A

RY-COMP

WXE-334K

N/FILTER1

33

RY-FAN,4WAY,HEATER

RY-4WAY,G5N-1A

RY-HEATER

RY-FAN

G5N-1A

COIL2

LS404060

CN-4WAY

CN-FAN

3

4

3

4

11

3

1

3

1

GMS81C1408SK(HYUNDDAI:8K)

TMR20V/RB7

SRDYIN/SRDYOUT/RC3

AN0/Aref/RB0

PWM0/COMP0/RB4

PWM1/COMP1/RB5

R97 1K

RY-HEATER

RY-COMP

RY-FAN

R96 620

RY-4WAY

10

6

100V

102J

C72

R73

13K

1%

1

6.04K

22

51.1K

2

-

4

5

-

+

L61

L62

FMX12S

L63

L64

D62

11

ST1

2

100Uf

R72

11K

1%

C71
+

25V

10.2K

1%

LED92

7

21.5K

39.2K

35.7K

+

11

4.3K

13

103

C91

R94

180

R93

390

1K

R90

LED91

DC12V

KRA102M

DC 5V

R71

Q71

13

9 9

8

15

16

2

1

12

13

14

11

4

3

5

6

MICOM

14

IC01M

KID65004APKID65004AP

11

12

10

EC1/RB6

8

9

6

7

INTO/RB2

INT1/RB3

BUZ/RB2

12.1K

R27

1%

OR7

OR8

1%

XXX XXX

1%

R28

12.1K

1%

OR5

OR4 OR6

XXX

1%

XXX

1% 1%

XXX

12.1K

R25

R24

12.1K

1%

12.1K

1% 1%

R26

DC 5V

TH1

1K

R32H

R31H

12.1K

2

453

AN7/RA7

Vdd

AN6/RA6

AN5/RA5

1

AN4/RA4

DC 5V

+

R02A

10K

16

BD61

U4SBA60

RC4/SCK

RC5/SIN

15

21

171918

20

23

22

Xout

RC6/SOUT

RD2

Xin

RD0/INT2

RESET

Vss

R01B 1M

R01A

C01A

103

1K

50V

CST-4.00MTW

OSC01B

7036P

R03A

100

C02A

10uF

IC4

DC 5V

252426

28

27

RD1/INT3

RA0/EC0

RA1/AN1

RA2/AN2

RA3/AN3

10K

C11H

103

R11H

10K

KEY

TEST

R12H

DC 5V

-57-

Exploded View and Replacement Parts List

1. Indoor Unit

249951

268714

147582

135311-1

146811-1

135500-3

146811-1

352380-2

352380-1

131410

147582

135311-2

263230

135500-2

135311-3

147581

354210

352150

35211B

349490

330870

135500-1

267110

152302

346810-1

359012-1

346810-2

359012-2

146811-1

135316

352116

352115

268712

135313

159830

-58-

Parts List(indoor)

131410 CHASSIS ASSEMBLY 3141A20008F R
135311-1 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20124E R
135311-2 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20124F R
135311-3 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20125D R

135316 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A10334J R
135500-1 COVER 3550A20060A R
135500-2 COVER 3550A20120B R
135500-3 COVER 3550A20121B R
146811-1 MOTOR ASSEMBLY,STEP 4681A20055A R

147581 LOUVER,HORIZONTAL 4758A20033A R

147582 LOUVER,VERTICAL 4758A20034A R

152302 FILTER(MECH),A/C 5230A10011A R

249951 CONTROL BOX ASSEMBLY,INDOOR 4995A20291T R

263230 THERMISTOR ASSEMBLY 6323A20004N R

267110 REMOTE CONTROLLER ASSEMBLY 6711A20083R R

268712 PWB(PCB) ASSEMBLY,DISPLAY 6871A20462D R
268714-2 PWB(PCB) ASSEMBLY,MAIN 6871A20387F R

330870 DRAIN PAN ASSEMBLY 3087A20013B R

346810 MOTOR ASSEMBLY,INDOOR 4681A20047C R

346810 MOTOR ASSEMBLY,INDOOR 4681A20047D R

349490 ORIFICE ASSEMBLY 4949A20002A R

352115 TUBE ASSEMBLY,EVAPORATOR IN 5211A20302E R

352116 TUBE ASSEMBLY,EVAPORATOR OUT 5211A20301F R

35211B TUBE ASSEMBLY,TUBING 5211AR7066M R

352150 HOSE ASSY,DRAIN 5251AR1222R R
352380-1 AIR GUIDE 5238A10009A R
352380-2 AIR GUIDE 5238A10010A R

354210 EVAPORATOR ASSEMBLY,FIRST 5421A20104C R
359012-1 FAN,TURBO 5900A00004A R
359012-2 FAN,TURBO 5900A00005A R

135313 GRILLE ASSEMBLY, INLET 3531A10270T R

LOCATION

No.

DESCRIPTION

PART No.

REMARKS

LA180CP

NOTE) *Please ensure GCSC since these parts may be changed depending upon the buyer's request.

(GCSC WEBSITE http://biz.LGservice.com)

2. Outdoor unit(18K)

-59-

649950

554160

567502

447910

550140

552203-1

552203-2

435512

437210

559010

546810

668711

552111

W0CZZ

554031

261704

437212

435511

430410

435301

-60-

Parts List(outdoor)

NOTE) *Please ensure GCSC since these parts may be changed depending upon the buyer's request.

(GCSC WEBSITE http://biz.LGservice.com)

261704 TRANSFORMER, POWER 6171AQ3198F 1

430410 BASE ASSY, WELD(OUTDOOR) 3041A30003F 1 R

435301 GRILLE, DISCHARGE 3530A20007B 1 R

435511 COVER ASSY, CONTROL(OUTDOOR) 3551AR7184T 1 R

435512 COVER ASSY, TOP(OUTDOOR) 3H03266J 1 R

437210 PANEL ASSY, FRONT(OUTDOOR) 3721A20005H 1 R

437212 PANEL ASSY, REAR 3720AP0003D 1 R

447910 BARRIER, OUTDOOR 1A00199G 1 R

546810 MOTOR ASSY, OUTDOOR 4681A20013M 1 R

550140 ISOLATOR, COMP 4H00982E 3 R

552111 TUBE ASSY, CAPILLARY 5425AR3847L 1 R
552203-1 VALVE, SERVICE 2A00392N 1 R
552203-2 VALVE, SERVICE 2H02479F 1 R

554031 CONDENSER ASSY, BENT 5403A20022B 1 R

554160 COMPRESSOR SET 2520UMLK1KA 1 R

559010 FAN ASSY, PROPELLER 1A00195B 1 R

567502 O.L.P 6750U-L025A 1 R

649950 CONTROL BOX ASSY, OUTDOOR 4781AR1528V 1 R

668711 PWB(PCB) ASSY, MAIN(OUTDOOR) 6871A10036T 1 R

W0CZZ CAPACITOR, DRAWING 6120AR2194B 1 R

LOCATION

No.

DESCRIPTION

PART No.

REMARKSQ'TY

LA180CP

MEMO

-61-

MEMO

-62-

P/No.: 3828A20065W

May, 2005

Printed in Korea