Room Air Conditioner SVC MANUAL(Exploded ... - Jordans Manuals

Internal Use Only 

http://biz.lgservice.com 

Room Air Conditioner 

SVC MANUAL(Exploded View) 

MODEL : AS-W306MMH0 

AS-W306MMH1 

CAUTION 

Before Servicing the unit, read the safety precautions in General SVC manual. 

Only for authorized service personnel.

Air Conditioner Service Manual 

TABLE OF CONTENTS 

LG Model Name.................................................................................................................................3 

Safety Precautions ...........................................................................................................................5 

Dimensions .....................................................................................................................................10 

Product Specifications ..................................................................................................................12 

Installation.......................................................................................................................................14 

Flaring work and connection of piping.........................................................................................16 

Connecting the cable between indoor unit and outdoor unit.....................................................23 

Checking the drainage and forming the pipings .........................................................................25 

Air purging ......................................................................................................................................27 

Test running ....................................................................................................................................29 

Functions.........................................................................................................................................30 

Operation.........................................................................................................................................33 

Disassembly....................................................................................................................................40 

Schematic Diagram ........................................................................................................................44 

Troubleshooting Guide ..................................................................................................................48 

Exploded View ................................................................................................................................76 

Copyright ©2008 LG Electronics. Inc. All right reserved. 

Only for training and service purposes 

- 2 - 

LGE Internal Use Only

2003 

LG Model Name 

LG Model Name 

1 2 - 3 4 5 6 7 8 9 10 

Code Type Code of Model Meaning 

1 Producing Center, A~Z L: Chang-won R22 N: India 

Refrigerant A: Chang-won R410A Z: Brazil 

C: Chang-won R407C D: Indonesia 

T: China M: Mexico 

K: Turkey R22 V: Vietnam 

E: Turkey R410A S: Out Sourcing 

H: Thailand 

2 Product Type A~Z S: Split Type Air Conditioner 

3 Cooling/Heating/Inverter A~Z C: Cooling only 

H: Heat pump 

X: C/O + E/Heater 

Z: H/P + E/Heater 

V: AC Inverter C/O 

N: AC Inverter H/P 

Q: DC Inverter C/O 

W: DC Inverter H/P 

4, 5 Capacity 0~9 Cooling/Heating Capacity 

Ex. "09" → 9,000 Btu/h 

6 Electric Range 1~9 1: 115V/60Hz, A: 220V, 50Hz, 3Phase 

A~Z 2: 220V/60Hz B: 208~230V, 60Hz, 3Phase 

3: 208-230V/60Hz C: 575V, 50Hz, 3Phase 

5: 200-220V/50Hz D: 440~460, 60Hz, 3Phase 

6: 220-240V/50Hz E: 265V, 60Hz 

7: 110V, 50/60Hz F: 200V, 50/60Hz 

8: 380-415V/50Hz 

9: 380-415V/60Hz 

7 Chassis A~Z Name of Chassis of Unit 

Ex. LSP → SP Chassis 

8 Look A~Z Look, 

Color (Artcool Model) 

9 Function A~Z Basic 

Basic+4Way 

Plasma Filter 

Plasma Filter+4 Way 

Tele+LCD 

Tele+LCD+Nano plasma+4Way 

Nano Plasma F+(A/changeove)+A/clean+Low A 

Nano Plasma F+(A/changeove)+A/clean+4way+Low A 

Tele+LED+4way 

Internet 

Plasma F+4Way+Oxy generator 

Nano Plasma F+(A/changeove)+A/clean 

Nano Plasma F+(A/changeove)+A/clean+4way 

Nano Plasma F+(A/changeove)+A/clean+PTC 

Nano Plasma F+(A/changeove)+Autoclean+4way+PTC 

Nano Plasma F+(A/changeove)+A/clean+4way+Low A+PTC 

Negative ION+A/Clean 

(Nano)Plasma+Negative ION+A/Clean 

4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean 

Nano Plasma F+4Way+(A/changeove)+A/clean+ 

10 Serial No. 0~9 LG Model Development Serial No. 

* ARTCOOL COLOR 

R 

Mirror 

W 

White 

B 

Blue 

D 

Wood 

M 

Metal 

C 

Cherry 

A 

B 

C 

D 

E 

F 

G 

H 

I 

J 

K 

L 

M 

N 

P 

Q 

R 

S 

T 

U 



- 3 - 


LG Model Name 

2004~ 

1 2 - 3 4 5 6 7 8 9 10 

Code Type Code of Model Meaning 

1 Producing Center, A~Z L Chang_won R22 

Refrigerant 

A Chang_won R410A 

C Chang_won R407C 

T China 

K Turkey R22 

E Turkey R410A 

H Thailand 

N India 

Z Brazil 

D Indonesia 

X Mexico 

V Vietnam 

S Out sourcing 

2 Product Type A~Z S: Split Type Air Conditioner 

3 Cooling/Heating/Inverter A~Z C: Cooling only 

H: Heat pump 

X: C/O + E/Heater 

Z: H/P + E/Heater 

V: AC Inverter C/O 

N: AC Inverter H/P 

Q: DC Inverter C/O 

W: DC Inverter H/P 

4, 5 Capacity 0~9 Cooling/Heating Capacity 

Ex. "09" → 9,000 Btu/h 

6 Electric Range 1~9 1: 115V/60Hz, A: 220V, 50Hz, 3Phase 

A~Z 2: 220V/60Hz B: 208~230V, 60Hz, 3Phase 

3: 208-230V/60Hz C: 575V, 50Hz, 3Phase 

5: 200-220V/50Hz D: 440~460, 60Hz, 3Phase 

6: 220-240V/50Hz E: 265V, 60Hz 

7: 110V, 50/60Hz F: 200V, 50/60Hz 

8: 380-415V/50Hz 

9: 380-415V/60Hz 

7 Chassis A~Z Name of Chassis of Unit 

Ex. LSP → SP Chassis 

8 Look A~Z Look, 

Color (Artcool Model) 

CHASSIS 

S4/S5 

S6 

SQ 

SR 

ST 

Look 

D 

K 

L 

G 

M 

N 

D 

P 

Division 

Panel Type(Deluxe) 

Fighting 'Look' 

(LG1) 

(LG2)-SEMI PANEL 

OEM1 

OEM2 

Panel Type(Deluxe) 

LG3 

9 Function A~Z 

Basic 

A 

Basic+4Way 

B 

Plasma Filter 

C 

Plasma Filter+4 Way 

D 

Tele+LCD 

E 

Tele+LCD+Nano plasma+4Way 

F 

NBF F+(A/changeove)+A/clean+Low A 

G 

NBF F+(A/changeove)+A/clean+4way+Low A 

H 

Tele+LED+4way 

I 

Internet 

J 

Plasma F+4Way+Oxy generator 

K 

NBF F+(A/changeove)+A/clean 

L 

NBF F+(A/changeove)+A/clean+4way 

M 

NBF F+(A/changeove)+A/clean+PTC 

N 

NBF F+(A/changeove)+Autoclean+4way+PTC 

P 

NBF F+(A/changeove)+A/clean+4way+Low A+PTC 

Q 

(Nano)Plasma+ION+A/Clean 

S 

4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean T 

Nano Plasma F+4Way+(A/changeove)+A/clean+Oxy generator 

U 

4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean+Oxy generator V 

Dry contact 

W 

Wire remocon 8 

10 Serial No. 0~9 LG Model Development Serial No. 

* ARTCOOL COLOR 

R 

Mirror 

W 

White 

B 

Blue 

D 

Wood 

M 

Metal 

C 

Cherry 



- 4 - 


Safety Precautions 


To prevent injury to the user or other people and property damage, the following instructions must 

be followed. 

■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is 

classified by the following indications. 

This symbol indicates the possibility of death or serious injury. 

This symbol indicates the possibility of injury or damage to properties only. 

■ Meanings of symbols used in this manual are as shown below. 

Be sure not to do. 

Be sure to follow the instruction. 

■ Installation 

Do not use damaged power cords, plugs, or a 

loose socket. 

• There is risk of fire of electric shock. 

Always use the power plug and socket with the 

ground terminal. 

• There is risk of electric shock. 

Install the panel and the cover of control box 

securely. 

Do not modify or extend the power cord. 

• There is risk of fire of electric shock. 

• No grounding may cause electric shock. 



- 5 - 



For re-installation of the installed product, 

always contact a dealer or an authorized service 

center. 

• There is risk of fire, electric shock, explosion, or 

injury. 

Do not install, remove, or re-install the unit by 

yourself. 

• There is risk of fire, electric shock, explosion, or 

injury. 

Be cautious when unpacking and installing the 

product. 

• Sharp edges could cause injury. Be especially careful 

of the case edges and the fins on the condenser 

and evaporator. 

For installation, always contact the dealer or 

an Authorized service center 

• There is risk of fire, electric shock, explosion, or injury. 

Do not install the product on a defective installation 

stand. 

• It may cause injury, accident, or damage to the 

product. 

Be sure the installation area does not 

deteriorate with age. 

• If the base collapses, the air conditioner could fall 

with it, causing property damage, product failure, 

and personal injury. 



- 6 - 



■ Operation 

Do not turn the air-conditioner ON or OFF by 

plugging or unplugging the power plug. 

• There is risk of fire or electrical shock. 

Use a dedicated outlet for this appliance. 


Grasp the plug to remove the cord from the 

outlet. Do not touch it with wet hands. 


Do not place a heater or other appliances near 

the power cable. 

• There is risk of fire and electric shock. 

Do not allow water to run into electrical parts. 

• There is risk of fire, failure of the product, or electric 

shock. 

Do not store or use flammable gas or combustibles 

near the air conditioner. 

• There is risk of fire or failure of product. 

Wax 

Thinner 



- 7 - 



Unplug the unit if strange sounds, odors, or 

smoke comes from it. 

• There is risk of electric shock or fire. 

Be cautious that water could not enter the 

product. 

• There is risk of fire, electric shock, or product damage. 

■ Installation 

Always check for gas (refrigerant) leakage after 

installation or repair of product. 

• Low refrigerant levels may cause failure of product. 

Install the drain hose to ensure that water is 

drained away properly. 

• A bad connection may cause water leakage. 

Keep level even when installing the product. 

• To avoid vibration or water leakage. 

Use two or more people to lift and transport 

the air conditioner. 

• Avoid personal injury. 

90˚ 



- 8 - 



■ Operation 

Use a soft cloth to clean. Do not use harsh 

detergents, solvents, etc. 

• There is risk of fire, electric shock, or damage to the 

plastic parts of the product. 

Do not touch the metal parts of the product 

when removing the air filter. They are very 

sharp! 

• There is risk of personal injury. 

Wax 

Do not step on or put anyting on the product. 

(outdoor units) 

• There is risk of personal injury and failure of product. 

Do not insert hands or other objects through 

the air inlet or outlet while the air conditioner 

is plugged in. 

• There are sharp and moving parts that could cause 

personal injury. 



- 9 - 


Dimensions 

Dimensions 

Symbols Used in this Manual 

This symbol alerts you to the risk of electric shock. 

This symbol alerts you to hazards that could cause harm to the 

air conditioner. 

NOTICE 

This symbol indicates special notes. 

Indoor Unit 

H 

W 

D 

Installation Plate 

Model 

30k Btu Series 

Dimension 

W mm(inch) 1,259(49.6) 

H mm(inch) 349(13.7) 

D mm(inch) 205(8.1) 



- 10 - 


L4 L3 

H 

L2 

D 

L1 

Dimensions 

Outdoor Unit 

W 

D 

W 

H 

L6 

L5 

L7 

MODEL 

DIM 

unit 

30k Btu Series 

W mm 870 

H mm 1,060 

D mm 320 

L1 mm 360 

L2 mm 20 

L3 mm 1,040 

L4 mm 20 

L5 mm 550 

L6 mm 160 

L7 mm 165 



- 11 - 


Product Specifications 


Table-1 

Item 

MIN 

Model Name 

Unit 

W 

kcal/h.(W) 

Btu/h. 

W 

Cooling Capacity Type kcal/h.(W) 

Btu/h. 

W 

Max 

MIN 

kcal/h.(W) 

Btu/h. 

W 

kcal/h.(W) 

Btu/h. 

W 

Heating Capacity Type kcal/h.(W) 

Btu/h. 

W 

Max 

kcal/h.(W) 

Btu/h. 

IN:20°C,Out: -10°C(Heater ON) Btu/h. 

IN:20°C,Out: -10°C(Heater OFF) Btu/h. 

Power Input Cooling W 

Heating 

W 

Heating(-10°C,Heater ON) W 

Heating(-10°C,Heater OFF) W 

Running Current Cooling A 

Heating 

A 

Heating(-10°C,Heater ON) A 

Heating(-10°C,Heater OFF) A 

Starting Current Cooling A 

Heating 

A 

Cooling 

kcal/hW 

EER 

Btu/h.W 

Heating 

kcal/hW 

Btu/h.W 

COP Cooling W/W 

Heating 

W/W 

Power Supply 

Ø,V,Hz 

Power Factor % 

Air Circulation Indoor,Max m 3 /min(CFM) 

Outdoor,Max 

m 3 /min(CFM) 

Moisture Removal 

l/h.(pts/h.) 

Noise Level Indoor,High dB(A)±3 

(Sound Med. dB(A)±3 

Pressure,1m) Low dB(A)±3 

Outdoor,Max 

dB(A)±3 

Refrigerant(R410A)Charge 

Power Cord AWG#:P*mm 2 

Connecting Cable AWG#:P*mm 2 

Connecting Tube Liquid Side mm(in) 

(Ø. Socket Flare) Gas Side mm(in) 

Length,std 

m(in) 

Drain Hose (O.D , I.D) mm(in) 

Indoor 

mm 

Dimension 

inch 

(W*H*D) Outdoor mm 

inch 

Net Weight Indoor kg(lbs) 

Outdoor 

kg(lbs) 

AS-W306MMH0 

3,016 

2,594 

10,294 

8,000 

6,879 

27,297 

9,350 

8,041 

31,910 

2,670 

2,296 

9,113 

9,500 

8,169 

32,415 

10,223 

8,792 

34,890 

- 

- 

2,800 

3,710 

- 

- 

12.5 

16.3 

- 

- 

12.5 

16.3 

2.46 

9.75 

2.20 

8.73 

2.86 

2.56 

1,220-240,50 

97 

21(742) 

58(2,048) 

3.156.62) 

48 

46 

43 

54 

2,440 

12:3*2.5 

18:4*0.75 

6.35(1/4) 

15.88(5/8) 

7.5(295) 

32.5, 30(1.27, 1.18) 

1,259*205*349 

49.5*6.8*13.7 

870*1,038*320 

34.2*40.8*12.5 

20(44.1) 

80(176.4) 



- 12 - 



Table-2 

Buyer Models 

Item 

Unit 

Cooling Capacity Min W 

kcal/h 

Btu/h 

Rating 

W 

kcal/h 

Btu/h 

Max 

W 

kcal/h 

Btu/h 

Heating Capacity Min W 

kcal/h 

Btu/h 

Rating 

W 

kcal/h 

Btu/h 

Max 

W 

kcal/h 

Btu/h 

Power Input Cooling W 

Heating 

W 

Running Current Cooling A 

Heating 

A 

Starting Current Cooling A 

Heating 

A 

EER 

W/W 

Btu/h.W 

COP 

W/W 

Power Supply 

Ø,V,Hz 

Air Circulation Indoor,Max m 3 /min (l/s) 

Outdoor,Max 

m 3 /min (l/s) 

Moisture Removal 

l/h (pts/h) 

Noise Level Indoor,High dB(A)±3 

(Sound Low dB(A)±3 

Pressure,1m) Outdoor,Max dB(A)±3 

Refrigerant (R410A) Charge 

g (oz) 

Power Cord P*mm 2 

Connecting Cable P*mm 2 

Connecting Tube Liquid Side mm (in) 

(Ø. Socket Flare) Gas Side mm (in) 

Length,std 

m (in) 

Dimension Indoor mm 

(W*H*D) 

in. 

Outdoor 

mm 

in. 

Net Weight Indoor kg (lbs) 

Outdoor 

kg (lbs) 

Energy Labeling Capacity Cooling 

Heating 

Energy Consumption Cooling 

Heating 

Star Rating 

Cooling 

Heating 

Tool (IN/OUT) 

AS-W306MMH1 

3,016 

2,594 

10,294 

7,510 

6,457 

25,624 

9,350 

8,041 

31,910 

2,670 

2,296 

9,113 

9,500 

8,168 

32,414 

10,223 

8,792 

34,890 

2,840 

4,140 

12.5 

17.6 

12.5 

17.6 

2.64 

9.02 

2.29 

1,220-240,50 

21.0 (350) 

58 (966) 

3.1 (6.6) 

48 

43 

54 

2,100 (74.1) 

3*2.5 

4*0.75 

6.35(1/4) 

15.88((5/8) 

7.5(295) 

1259*205*349 

49.5*6.8*13.7 

1,038*870*320 

34.2*40.8*12.5 

20 (44.1) 

80 (176.4) 

7.51 

9.50 

2.84 

4.14 

2.5 

1.0 

SM+UE2 



- 13 - 


A 

Installation 

Installation 

Selection of the Best Location 

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 30cm. The unit should be 

installed as high on the wall as possible, allowing 

a minimum of 12cm from ceiling. 

■ Use a stud finder to locate studs to prevent 

unnecessary damage to the wall. 

More than 

30cm 

More than 2.3m 

More than 12cm 

More than 

30cm 



30k 



More 

than 60cm 

■ 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. 

If the outdoor unit is installed on root structures or walls, 

this may result in excessive noise and vibration, and 

maybe also classed as non serviceable installation. 

Piping Length and Elevation 

Pipe Size Standard Max. Max. Additional 

Capacity 

Install the indoor unit on the wall where the height 

Length Elevation length Refrigerant 

(Btu/h) GAS LIQUID (m) B (m) A (m) (g/m) 

from the floors more than 2.3 meters. 

A minimum pipe run of 7.5 meters is required to minimise 

vibration & excessive noise. 30k 5/8" 1/4" 7.5 15 30 35 

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. The front of the unit should have 

more than 70cm 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. 

Indoor unit 

Outdoor unit 

Oil trap 

Indoor unit 

B 

In case more than 5m 

A 

Outdoor unit 

B 

• 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. 



- 14 - 


Installation 

How to Fix Installation Plate 

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

vibration 

1. Mount the installation plate on the wall with four 

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. 

Drill a Hole in the Wall 

■ Drill the piping hole with a ø70mm hole core drill. 

Drill the piping hole at either the right or the left 

with the hole slightly slanted to the outdoor side. 

Indoor 

WALL 

Outdoor 

Installation Plate 

5-7mm 

(0.2~0.3") 

Type "A" screw 

2. 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. 

Left rear piping 

Right rear piping 

115mm 

50mm 

180mm 

ø70mm 

30k 



- 15 - 


Flaring work and connection of piping 


Flaring work 

Main cause for gas leakage is due to defect in flaring 

work. Carry out correct flaring work in the following 

procedure. 

Cut the pipes and the cable. 

■ Use the piping kit accessory or the pipes 

purchased locally. 

■ Measure the distance between the indoor and the 

outdoor unit. 

■ Cut the pipes a little longer than measured 

distance. 

■ Cut the cable 1.5m longer than the pipe length. 

Copper 

pipe 90° Slanted Uneven Rough 

Flaring work 

■ Carry out flaring work using flaring tool as shown 

below. 

Outside diameter 

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 

ø19.05 3/4 1.0 ~ 1.3 

Firmly hold copper pipe in a die in the dimension 

shown in the table above. 

A 

Burrs 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. 

Bar 

"A" 

Bar 

Copper pipe 

Clamp handle 

Handle 

Yoke 

Cone 

Red arrow mark 

Pipe 

Reamer 

Check 

Point down 

■ Compare the flared work with figure below. 

■ If flare is noted to be defective, cut off the flared 

section and do flaring work again. 

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) 

Flare nut 

Smooth all round 

Inside is shiny without scratches 

= Improper flaring = 

Copper tube 

Even length 

all round 

Inclined 

Surface 

damaged 

Cracked Uneven 

thickness 



- 16 - 



Connection of piping -- Indoor 

1. Remove the 2 screws of right side panel. 

Right side panel 

When install, make sure that 

the remaining parts must be 

removed clearly so as not to 

damage the piping and drain 

hose, especially power cord 

and connecting cable. 

2. Remove the front right side panel by the arrow. 

■ The connector can be disconnected by pulling it 

while pressing the connector's hook. 

■ Remove the 1 screw for fixing lower panel. 

For left rear piping 

1. Route the indoor tubing and the drain hose in the 

direction of rear left. 

Main PCB 

Drain hose 

Lower panel 

3. Remove the lower panel by the arrow. 

■ Take care not to scratch the wall and mat to 

drop. 

2. Insert the connecting cable into the indoor unit 

from the outdoor unit through the piping hole. 

■ Do not connect the cable to the indoor unit. 

■ Make a small loop with the cable for easy 

connection later. 

Lower panel 

Press the lower left and right sides of the unit against the 

installation plate until the hooks engage into their slots(clicking 

sound). 



- 17 - 



3. 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. 

5. Connecting the pipings to the indoor unit and drain 

hose to drain pipe. 

■ Align the center of the pipings and sufficiently 

tighten the flare nut by hand. 

Indoor unit tubing Flare nut Pipings 

■ Tighten the flare nut with a wrench. 

Loop 

Indoor unit tubing 

Connecting 

cable 

Drain hose 

Gas side 

piping 

Liquid side 

piping 

Connection pipe 

Flare nut 

Torque wrench 

NOTICE 

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. 

Spanner (fixed) 

Capacity 

Pipe Size[Torque] 

(Btu/h) GAS LIQUID 

30k 5/8"[6.6kg.m] 3/8"[4.2kg.m] 

4. Indoor unit installation 

■ Hook the indoor unit onto the upper portion of the 

installation plate.(Engage the three hooks of the 

rear top and rear lower of the indoor unit with the 

upper edge and lower edge of the installation 

plate.) Ensure that the hooks are properly seated 

on the installation plate by moving it left and right. 

Installation plate 

Setting line 

■ When extending the drain hose at the indoor unit, 

install the drain pipe. 

Drain pipe 

Indoor unit drain hose 

Adhesive 

Vinyl tape(narrow) 

Indoor unit 

Three upper 

hooks 

Installation 

plate 

Three lower 

hooks 



- 18 - 



6. 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. 

For right rear piping 

1. Route the indoor tubing and the drain hose to the 

required piping hole position. 

Plastic bands 

Insulation material 

Drain hose 

■ Wrap the area which accommodates the rear piping 

housing section with vinyl tape. 

2. Insert the piping, drain hose and the connecting 

cable into the piping hole. 

Connection 

pipe 

Vinyl tape 

(wide) 

Wrap with vinyl tape 

Indoor 

unit pipe 

Connecting cable 

Drain pipe 



Pipe 

3. Insert the connecting cable into the indoor unit. 

■ Don't connect the cable to the indoor unit. 

■ Make a small loop with the cable for easy 

connection later. 

■ Bundle the piping and drain hose together by 

wrapping them with vinyl tape over the range within 

which they fit into the rear piping housing section. 

4. Tape the drain hose and the connecting cable. 

• Connecting cable 


Pipe 

Drain hose 

Vinyl tape(wide) 



- 19 - 



5. Indoor unit installation 

■ Hook the indoor unit onto the upper portion of the 

installation plate.(Engage the three hooks of the 

rear top and rear lower of the indoor unit with the 

upper edge and lower edge of the installation 

plate.) Ensure that the hooks are properly seated 

on the installation plate by moving it left and right. 

■ When extending the drain hose at the indoor unit, 

install the drain pipe. 

Drain hose 

Installation plate 

Setting line 

Vinyl tape 

Adhesive 

Indoor unit drain hose 

(narrow) 

Indoor unit 

Three upper 

hooks 

Installation 

plate 

Three lower 

hooks 

7. Wrap the insulation material around the connecting 

portion. 

■ Overlap the connection pipe heat insulation and the 

indoor unit pipe heat insulation material. Bind them 

together with vinyl tape so that there is no gap. 

Plastic bands 

Insulation material 

6. Connecting the pipings to the indoor unit and the 

drain hose to drain pipe. 

■ Align the center of the pipings and sufficiently 


■ Wrap the area which accommodates the rear 

piping housing section with vinyl tape. 

Indoor unit tubing Flare nut Pipings 

■ Tighten the flare nut with a wrench. 

Connection 

pipe 

Vinyl tape 

(wide) 


Indoor 

unit piping 

Spanner (fixed) 

Torque wrench 

Flare nut 

Connection pipe 


Pipe 


Indoor unit tubing 

Capacity 



30k 5/8"[6.6kg.m] 3/8"[4.2kg.m] 



- 20 - 



■ Bundle the piping and drain hose together by 

wrapping them with cloth tape over the range 

within which they fit into the rear piping housing 

section. 

9. Reinstall the parts to the original position. 

■ Refix the lower panel to the original position. 

Drain hose 

Pipe 


Wrap with 

vinyl tape(wide) Lower panel 

■ Connect display conductor. 

8. Reroute the pipings and the drain hose across the 

back of the chassis. 

Main PCB 

Piping for 

passage through 

piping hole 

■ Refix the front right side panel to the original 

position with the two screws. 




- 21 - 



Connection of the drain hose 

■ The drain hose can be connected at two different 

positions. Use the most convenient position and, if 

necessary, exchange the position of the drain 

pan, rubber cap and the drain hose. 

➊ Drain pan 

➋ Rubber cap 

➌ Drain hose 

➍ Exchange if necessary 

■ Remove the drain hose. 

■ Securely insert both the rubber plug and drain 

hose into the drain outlets. 

Be sure the rubber the cap is securely fastened 

so that there is no leakage. 

2 

1 

4 

3 

Connection of piping-Outdoor 

1. Align the center of the pipings and sufficiently 


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. 

Capacity 



30k 5/8"[6.6kg.m] 3/8"[4.2kg.m 

Outdoor unit 

Gas side piping 

(Bigger diameter) 

Liquid side 

piping 

(Smaller 

diameter) 

Torque wrench 



- 22 - 


Connect the cable to the Indoor unit. 

Connecting the cable between indoor unit and outdoor unit 


■ Connect the cable to the indoor unit by connecting 

the wires to the terminals on the control 

board individually according to the outdoor unit 

connection.(Ensure that the color of the wires of the 

outdoor unit and the terminal No. are the same as 

those of the indoor unit.) 

The power cord connected to the outdoor unit 

should be complied with the following 

specifications (Rubber insulation, type H05RN-F 

approved by HAR or SAA). 

Terminals on the indoor unit 1(L) 2(N) 3 

Color of Wires 

BROWN BLUE G/Y 

RED 

8.5mm 

GN/YL 

NORMAL 

CROSS-SECTIONAL 

AREA 2.5mm 2 

Color of Wires 

Terminals on the outdoor unit 

1(L) 2(N) 

BROWN BLUE G/Y 

RED 

1(L) 2(N) 3 

30k 

20mm 

POWER INPUT 

The connecting cable connected to the indoor 

and outdoor unit should be complied with the 

following specifications (Rubber insulation, type 

H07RN-F approved by HAR or SAA). 

If a power plug is not to be used, 

provide a circuit breaker between 

power source and the unit as 

shown below. 

7.5mm 

GN/YL 

20mm 

NORMAL 

CROSS-SECTIONAL 

AREA 0.75mm 2 

Main power source 

Air 

Conditioner 



- 23 - 



Connect the cable to the outdoor unit 

1. Remove the control cover from the unit by loosening 

the screw. 

Connect the wires to the terminals on the control 

board individually. 

2. Secure the cable onto the control board with the 

cord clamp. 

3. Refix the control cover to the original position with 

the screw. 

4. Use a recognized circuit breaker 30A (30k, 32k), 

35A (36k, 38k) between the power source and the 

unit. A disconnecting device to adequately disconnect 

all supply lines must be fitted. 

Main terminal board 

Control terminal board 

Cover control 

After the confirmation of the above conditions, prepare the wiring as follows: 

1) Never fail to have an individual power circuit specifically for the air conditioner. As for the method 

of wiring, be guided by the circuit diagram posted on the inside of control cover. 

2) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from 

vibrations to which the unit is subjected during the course of transportation. Check them and make 

sure that they are all tightly fastened. (If they are loose, it could cause burn-out of the wires.) 

3) Specification of power source. 

4) Confirm that electrical capacity is sufficient. 

5) See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on 

the name plate. 

6) Confirm that the cable thickness is as specified in the power source specification. 

(Particularly note the relation between cable length and thickness. (Refer to page 32)) 

7) Always install an earth leakage circuit breaker in a wet or moist area. 

8) The following would be caused by voltage drop. 

• Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of the normal 

function of the overload. 

9) The means for disconnection from a power supply shall be incorporated in the fixed wiring and have 

an air gap contact separation of at least 3mm in each active(phase) conductors. 



- 24 - 


Checking the drainage and forming the pipings 


Checking the drainage 

1. Remove the right side panel. 


4. To check the drainage. 

■ Pour a glass of water on the drain pan. 

■ Ensure the water flows through the drain hose of 

the indoor unit without any leakage and goes out 

the drain exit. 

2. Remove the lower panel by the arrow. 

Lower panel 

3. Remove the left side panel. 

(Remove the two screws.) 

5. Drain piping 

■ The drain hose should point downward for easy 

drain flow. 

Downward slope 

■ Do not make drain piping. 

Do not raise 

Accumulated 

drain water 

Air 

Left side panel 

Water 

leakage 

Water 

leakage 

Waving 

Tip of drain hose 

dipped in water 

Less than 

50mm gap 

Water 

leakage 

Ditch 



- 25 - 



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. 

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 

Seal a small opening 

around the pipings 

with gum type sealer. 

Trap 

Drain hose 

Taping 

Pipings 

Connecting 

cable 

Power supply 

cord 

Trap is required to prevent water from entering 

into electrical parts. 



- 26 - 


Air purging 

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. 

■ 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. 

Indoor unit 

Air purging with vacuum pump 

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. 

Leak test 

■ Connect the manifold valve(with pressure gauges) 

and dry nitrogen gas cylinder to this service port 

with charge hoses. 

Pressure 

gauge 

Manifold valve 

Lo 

Outdoor unit 

Hi 

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. 

Charge hose 

■ 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. 

Nitrogen gas 

cylinder(in vertical 

standing position) 



- 27 - 



Soap water method 

(1) Remove the caps from the gas side and liquid side valves. 

(2) Remove the service-port cap from the gas side valve. 

(3) To open the gas side valve turn the valve stem counterclockwise 

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 connections by a 

soft brush to check for leakage of the connecting points of 

the piping. 

(5) If bubbles come out, the pipes have leakage. 

3-way valve 

(Close) 

3-way valve 

(Open) 

Gas side 

Liquid side 

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. 

Indoor unit 

Hexagonal wrench 

Cap 

Required time for evacuation 

when 30 gal/h vacuum pump is used 

If tubing length is less If tubing length is longer 

than 10m (33 ft). than 10m (33 ft). 

10 min. or more 15 min. or more 

■ When the desired vacuum is reached, close the 

"Lo" knob of the manifold valve and stop the 

vacuum pump. 

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 counterclockwise 

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. 

Pressure 

gauge 

Manifold valve 

Open 

Lo 

Outdoor unit 

Hi 

Close 

Vacuum pump 



- 28 - 


Test running 

Test Running 

1. Check that all tubing and wiring have been properly 

connected. 

2. Check that the gas and liquid side service valves 

are fully open. 

Prepare remote control 

Remove the battery cover 

by pulling it according to the 

arrow direction. 

Insert new batteries making 

sure that the (+) and (–) of 

battery are installed correctly. 

Reattach the cover by 

pushing it back into position. 

NOTICE 

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

batteries. 

• Remove the batteries from the remote control if the 

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

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 rubber. 

Bolt 

Evaluation of the performance 

Tubing connection 

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 

(Cooling) or reversely (Heating). 

Discharge air 

Outside ambient TEMP 

35°C(95°F) 

The pressure of the gas side service valve 

NOTE: If the actual pressure are 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. 

PUMP DOWN 

Intake temperature 

Discharge 

temperature 

4. For reference; the gas side pressure of optimum 

condition is as below.(Cooling) 

4~5kg/cm 2 G(56.8~71.0 P.S.I.G.) 

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/cm 2 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. 



- 29 - 


Functions 

Functions 

Indoor Unit 

Cooling Mode Operation 

Healthy dehumidification Mode Operation 

Heating Mode Operation 

Jet Cool Mode Operation 

Jet Heat Mode Operation (Optional) 

Operation ON/OFF by Remote controller 

Sensing the Room Temperature 

• Room temperature sensor. (Thermistor) 

• Pipe temperature sensor. (Thermistor) 

Room Temperature Control 

• Maintain the room temperature in accordance with the Setting Temp. 

Starting the Current Control 

• Indoor fan is delayed for 5 sec at the starting. 

Time Delay Safety Control 

• Restarting is for approx. 3 minutes. 

Indoor Fan Speed Control 

• Super High, High, Med, Low 

Operation indication Lamps (LED) 

On/Off : Lights up during the system operation. 

Timer or : Lights up during Timer operation or 

Sleep Mode Sleep mode. 

Defrost Mode : Lights up during Defrost Mode or Hot 

Start operation. (Heat pump model only) 

Outdoor unit : Lights up during outdoor unit operation. 

operation (Cooling model only) 

Plasma Mode : Lights up during plasma-purification 

operation.(option) 

Auto Restart Mode : Lights up during if Restart Button 

is pressed. 

Auto Restart Button : In failure of electric power, if the 

button is pressed the unit runs as 

previous setting operation when 

power returns. 

Forced Operation Button : Operation starts, when this button 

is pressed and stops when you 

press the button again. 



- 30 - 


Functions 

Sleep Mode Auto Control 

• The fan is switched to low(Cooling), low(Heating) speed. 

• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours. 

Natural Air Control by New CHAOS Logic 

• The fan is switched to intermittent or irregular operation 

• The fan speed is automatically switched from high to low speed. 

Airflow Direction Control 

• The louver can be set at the desired position or swing up and down automatically. 

Auto Changeover 

Horizontal airflow Direction Control(Optional) 

Auto Clean(Optional) 

Plasma 

• The function will be operated while in any operation mode with selecting the function. 

• The function is to be stopped while it isoperating with selecting the function. 

Defrost(Deice) Control (Heating) 

• Both the indoor and outdoor fan stops during defrosting. 

Hot-start Control (Heating) 

• The indoor fan stops until the evaporator pipe temperature will be reached at 34°C. 



- 31 - 


Functions 

Function of Outdoor Unit 

Outdoor Unit 

Two Comp algorithm 

• Inverter Comp is first priority and then Constant Comp is turning on responding to load condtion. 

Operating Frequency 

• Inverter Frequency varies considering condition such as room temp,outdoor temp, operating room 

number,Temp gap between room temp and set temp and so on. 

LEV Control 

• LEV pulse is modulated to keep constant superheat or subcooling. 

Out door Fan Control 

• Outdoor fan operates at High/Low or Off to respond to the load condition. 

R/Valve Control 

• Convert R/Valve to change cooling to heating, heating to cooling. 

Comp Pre-Heat Logic 

• Checking outdoor temp, D-Pipe temp,Heat Sink Temp, operate compressor at low frequency upto 

5min to preheat oil. 

Defrost Function 

• After 35 min heating operation, check the defrost condition and if outdoor pipe temp is below -6°C and 

released from deice operation in case outdoor pipe temp is over 15°C or 7 min cooing mode. 

• To deice outdoor heat exchanger in low temp condtion, convert operating mode from heating to 

cooling, in this case, indoor and outdoor fan is off. 

Oil Return System 

• In heating operation, every 3 hours, changes from heating to cooling for 5 min to return the oil in piping 

to compressor. 

IPM Over Heat Protection 

• To protect IPM overheat, down comp Hz. 

Comp Overload Protection 

• To protect comp from being overload, down comp Hz. 

Low Pressure Protection 

• If cylce pressure is low (around 0.3kgf/cm2), turn off comp and outdoor fan. 



- 32 - 


Operation 

Operation 

Function of Controls 

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) 

Timer/Sleep Timer Indicator 

• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause 

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 compressor is 

off fan operates at low speed regardless of the setting. 

Healthy Dehumidification Mode Operation 

• 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

Operation 

Auto restarting operation 

• When the power is restarted 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. 

• 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 

- Chaos Swing 

Defrosting 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. 

• Defrosting control is available 50 minutes later since heating cycle started and the pipe temperature of outdoor 

unit reaches below -6°C. 

Operating 

Freq. of 

Comp. 

Minimum Time 

of Heating 

Setting Freq. 

Main Deice time 

Setting 

Freq. 

Fh 

min 

Fh 

min 

Fh 

min 

EEV 

Open step 

Setting 

Starting step 

4-Way 

ON 

ON 

Outdoor 

FAN 

Indoor 

FAN 

Setting 

Speed 

Setting 

Speed 

OFF 

OFF 

Hi Speed 

Hot 

Start 

Setting 

Speed 

Hot 

Starting 

Pre-Heat 

LED 

OFF 

ON 

OFF 

Deice STEP 

0 1 2 3 4 5 6 



- 34 - 


Operation 

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 compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C, when above 27°C , it 

operates with the low or setting speed. When the indoor pipe temp is between 20°C and 27°C, it operates with 

Super-Low(while in sleep mode, with the medium airflow speed). 

• While 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. 

• While in defrost control, the indoor is outdoor fans are turned off. 

Defrost Control(Heating) 

• 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 35 minutes passed from 

starting of heating operation and more than 4 minutes operation of compressor. 

• Defrost ends after 12 minutes passed from starting of defrost operation when the outdoor pipe temperature 

rises over 15°C even before 12 minutes. 

• The second defrost starts only when the outdoor pipe temperature falls below -6°C after 35 minutes passed 

from ending of the first defrost and more than 4 minutes operation of compressor. 

Auto Changeover 

• The air conditioner changes the operation 

mode automatically to keep indoor temperature. 

• When room temperature vary over ±2°C with 

respect to setting temperature, air conditioner 

keeps the room temperature in ±2°C with 

respect to setting temperature by auto 

change mode. 

+2°C 

+1°C 

+0.5°C 

Set Temp. 

-0.5°C 

-1°C 

-2°C 

Outdoor temp. 

Indoor temp. 

Outdoor 

temp. 

30°C 

20°C 

Auto 

Change 

Mode. 

COOLING 

HEATING 

10°C 



- 35 - 


Operation 

Airflow Speed Selection 

• The airflow speed of the indoor fan is set to high, medium, low, or power (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. 

While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature. 

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 is input by the remote control 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. 



- 36 - 


Operation 

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. 

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. 

Forced Operation 

• To operate the appliance by force in case that the remote control 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. 

• In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the operation 

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

Operation 

Display Function 

Signal Receptor 

Receives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.) 

Operation Indication Lamps 

On/Off 

Timer or Sleep Mode 

Defrost Mode 

: Lights up during the system operation. 

: Lights up during Timer operation or Sleep 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) 

Plasma Mode 

: Lights up during plasma-purification operation.(option) 

Auto Restart Mode : Lights up during if Restart Button is pressed. 

Auto Restart Button : In failure of electric power, if the button is pressed the unit runs as previous 

setting operation when power returns. 

Forced Operation Button : Operation starts, when this button is pressed and stops when you press the 

button again. 

Self-diagnosis Function 

Error 

Code 

Error LED 

(Indoor body operation LED) 

Error contents 

SVC check point 

1 

(once) 

3sec 3sec 3sec 

• Indoor room temperature 

thermistor open/short 

• Indoor pipe temperature 

thermistor open/short. 

• Indoor TH assy check 

2 

(twice) 

3sec 

3sec 

• Outdoor pipe temperature 

thermistor open/short. 

• Outdoor TH assy check 

5 

(5times) 

3sec 

• Poor communication. 

• Communication line/circuit 

check 



- 38 - 


Operation 

Remote Control Operations 

The controls will look like the following. 

5 

6 

4 

2 

7 

11 

8 

13 

15 

ON 

OFF 

Operation Mode 

CANCEL 

SET 

AUTO CLEAN 

Cooling Operation 

Auto Operation or Auto Changeover 

Healthy Dehumidification Operation 

Heating Operation 

Signal transmitter 

1 

3 

10 

9 

12 

14 

16 

Flip-up door 

(opened) 

• Cooling Model( ), Heat Pump Model( ) 

17 

1. START/STOP BUTTON 

Operation starts when this button is pressed and 

stops when the button is pressed again. 

2. OPERATION MODE SELECTION BUTTON 

Used to select the operation mode. 

3. ROOM TEMPERATURE SETTING BUTTONS 

Used to select the room temperature. 

4. INDOOR FAN SPEED SELECTOR 

Used to select fan speed in four steps 

low, medium, high and CHAOS. 

5. JET COOL/JET HEAT (OPTIONAL) 

Used to start or stop the speed cooling/heating. 

(speed cooling/heating operates super high fan speed in 

cooling/heating mode.) 

6. CHAOS SWING BUTTON 

Used to stop or start louver movement and set 

the desired up/down airflow direction. 

7. ON/OFF TIMER BUTTONS 

Used to set the time of starting and stopping operation. 

8. TIME SETTING BUTTONS 

Used to adjust the time. 

9. TIMER SET/CANCEL BUTTON 

Used to set the timer when the desired time is obtained 

and to cancel the Timer operation. 

10. SLEEP MODE AUTO BUTTON 

Used to set Sleep Mode Auto operation. 

11. AIR CIRCULATION BUTTON 

Used to circulate the room air without cooling or heating. 

12. ROOM TEMPERATURE CHECKING BUTTON 

Used to check the room temperature. 

13. PLASMA(OPTIONAL) 

Used to start or stop the plasma function. 

14. HORIZONTAL AIRFLOW DIRECTION CONTROL 

BUTTON (OPTIONAL) 

Used to set the desired horizontal airflow direction. 

15. RESET BUTTON 

Used prior to resetting time. 

16. 2ND F BUTTON 

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

buttons. 

17. AUTO CLEAN (OPTIONAL) 

Used to set Auto Clean mode. 



- 39 - 


Disassembly 

Disassembly 

Indoor Unit 

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. 

➊ Remove the 2 screws of right side panel. 

➋ Remove the right side panel by the arrow. 

■ The connector can be disconnected by pulling it 

while pressing the connector's hook. 

■ Remove the 1 screw for fixing low panel. 

Main PCB 

Lower panel 

➌ Remove the lower panel by the arrow. 

■ Take care not to scratch the wall and mat to 

drop. 

Lower panel 

➍ Remove the left side panel. 

(Remove the 2 screws.) 

Left side panel 



- 40 - 


Disassembly 

➎ Remove the grille from the chassis. 

• Remove the 4 securing screws.(30k) 

• To remove the Grille, pull the lower left and right side 

of the grille toward you (slightly tilted) and lift it 

straight upward. 

➏ Separate the black lead wire from the white connector. 

BLACK 

WHITE 

2. To remove the sensor, housing connector, earth 

conductor and step motor conductor with sensor 

holder, Motor, Evaporator and P.C.B. 

Motor 

Conductor 

Earth 

Conductor 

Power 

Conductor 

Sensor 

Conductor 

Step Motor 

Conductor 



- 41 - 


Disassembly 

3. To remove the Control Box. 

• Remove the 5 securing screws. 

• Pull the control box out from the chassis 

carefully. 

Screw 

4. To remove the Discharge Grille. 

• Remove the 3 securing screw. 

• Pressing the right side of the discharge grille 

downward slightly, unhook the discharge grille. 

• Pull the discharge grille out from the chassis 

carefully. 

Screw 

5. To remove the Evaporator. 

• Remove 3 screws securing the evaporator(at the 

left 2EA, at the right 1EA). 

• Remove 2 screw securing the evaporator clamp. 

Screw 

Screw 

• Unhook the tab on the right inside of the chassis 

at the same time, slightly pull the evaporator 

toward you until the tab is clear of the slot. 



- 42 - 


Disassembly 

6. To remove the Fan motor 

• Loosen the screw securing the cross-flow fan to 

the fan motor (do not remove). 

Fan motor 

Screw 

• Loosen the screw securing the mount motor. 

Screw 

Mount motor 

• Separate the fan motor from the cross-flow fan. 

• Take care not to drop the motor. 

Fan motor 

7. To remove the Cross-Flow Fan 

• Loosen the screw securing the holder bearing. 

• Lift up the cross-flow fan. 

Holder bearing 

Screw 



- 43 - 


Schematic Diagram 


Wiring Diagram 

Indoor Unit 

Models: 30k Heat Pump Model 

Outdoor Unit 

Models: 30k Heat Pump Model 



- 44 - 


55 

10 


Components Location 

Main P.W.B Assembly 

30k Indoor 

• TOP VIEW 

C01N 

CN-L/R2 

CN-L/R1 

CN-U/D 

CN-12V 

CN-ION 

J10 

R01G 

R02G 

CN-DISP 

R05G 

R04G 

R03G 

CN-TH2 

R07H 

R08H 

R09H 

C03H 

JW06 

C01A 

R08N 

R07N 

R06N 

R04K 

EEPROM 

R02L 

R03A 

R02A 

Q01K 

J21 

J22 

D02D 

R06K 

R01A 

JW04 

C01X 

R03N 

R04F 

C02F 

JW05 

R05N 

R04N 

R01E 

R02E 

R02D 

R01D 

R01B 

C01L 

30 

25 

20 

JW03 

R10H 

OR02H 

C04H 

OR01H 

R05H 

C01K 

C02D 

R06D 

R06H 

JW02 

R03H 

C02H 

R04H 

C01H 

R07D 

R07K 

R03D 

JW01 

R02N 

R01N 

C01F 

33 

R11N 

R12N 

R13N 

R14N 

50 

R09N 

R10N 

R01K 

R02K 

R04D 

C03D 

1 

R11H 

R01H 

R02H 

1 16 

C10D 

16 

1 16 

ZD02D 

CN-TH1 

R05G 

R04G 

R03G 

R02G 

R01G 

R15N 

R16N 

60 

5 

R01L 

R03F 

CN-TH2 

45 

40 

35 

C02L 

CN-MOTOR 

ZNR01N 

FUSE 250V/T2A 

CN-POW 

12V 

J07 

J06 

J08 

J09 

CN-HVB(BL) 

CN-TH1 

P 

C05D 

J11 

IC02D 

ZD02D 

J12 

J13 

J14 

D01K 

N/F01N 

IC03D 

R04D 

IC04D 

J15 

R03K 

ZD01K 

R02K 

R01K 

R05K 

CY2 

C02N 

CY1 

WCN-NOISE 

ZNR01F 

S-TRANS 

SSR 

7 4 

C01D 

R05D 

C07D 

C08D 

5V 

J05 

J04 

PWB:6870A90203A 

ASSM:6871A20509 

J17 

J16 

J18 

BD01D 

3 

1 

D04D 

Q01D 

J02 

J01 

OR1H OR2H 

L1 

IC01K 

IC02K 

R01D 

R02D 

D01D 

NTC 

ZD01D 

BZ01E 

IC01A 

OSC01B 

J19 

IC01D 

D03D 

J22 

GND 

J21 

J03 

C01A 

J20 

EEPROM 

• BOTTOM VIEW 

CN-L/R1 

CN-L/R2 

CN-12V 

CN-DISP 

CN-U/D 

CN-ION 

R 

C02L 

J10 

CN-HVB(BL) 

J08 

12V 

CN-POW 

C01N 

ZNR01N 

FUSE 

C05D 

P 

CN-MOTOR 

J09 

J06 

J07 

C04D 

J11 

J14 

J13 

IC01G 

J12 

IC01M 

IC02M 

IC02D 

D01K 

J15 

J18 

J16 

R01F 

R02F 

J17 

16 

1 

RXD 

J05 

5V 

J04 

IC04D 

C08D 

C09D 

C07D 

R05D 

IC03D 

S-TRANS 

SSR 

ZNR01F 

C01D 

N/F01N 

C02N 

CY1 

WCN-NOISE 

BD01D 

CY2 

R05K 

ZD01K R03K 

J01 

J02 

D04D 

OSC01B 

MICOM 

Q01D 

BZ01E 

L1 

C06D 

D01D 

ZD01D 

IC02K 

IC01K 

J19 

J20 

IC01A 

D03D 

NTC 

IC01D 

J03 

TXD 



- 45 - 


- 46 - 



LGE Internal Use Only 

30k Outdoor 

• BOTTOM VIEW 

• TOP VIEW 


CN_ADDR3 

R20K 

R01B 

C07K 

C06K 

15 

C05M 

R11M 

R04P 

R12P 

R11P 

C15Z 

C16Z 

R09P 

C03P 

R03P 

R02P 

R07P 

R05P 

C01P 

R01P 

C02P 

R16Z 

R17Z 

D03Z 

C12Z 

R20Z 

C13Z 

C11Z 

R19Z 

R18Z 

R10Z 

R12Z 

C06Z 

13 

14 

C14Z 

8 

9 

10 

11 

12 

6 

7 

C03Z 

C05Z 

R07Z 

R11Z C17Z 

1 

2 

3 

4 

5 

R21P 

7 

6 

V 

U 

V 

U 

28 

13 

12 

9 

8 

Nv 27 

Nw 

Nu 

25 

24 

26 

1 

3 

5 

SPM2 

CN_LEV5 

C07M 

C07D 

C03D 

IC04D 

IC01P 

C05P 

R13P 

CN_LEV1 

R10P 

R08P 

R06P 

R14P 

C04P 

CN_LEV3 

CN_LEV4 

C08M 

C09M 

IC07M 

CN_LEV2 

C11M 

D01D 

C04D 

C01D 

SMPS 

C02D 

C06D 

C10K 

C09K 

C08K 

C10M 

R16T 

IC09M 

IC08M 

C04M 

IC05M 

R10M 

IC04M 

C03M 

R09M 

L01D 

R15P 

R17P 

R16P 

R13T 

Q01T 

R11T 

R02T 

CN_CENTRAL 

CN_LEV6 

C06M 

R12T 

D07K 

D08K 

CN_JIG_PC 

R06T 

R05T 

L03D 

C01A 

CN_WRITER 

R01T 

R01A 

C03A 

C01L 

R09Z 

R10T 

C14K 

C12K C11K 

R17T 

R09T 

R06Z 

C15K 

C01T 

C13K 

R05Z 

R20P 

R19P 

R02Z 

R01Z 

C08P 

C07P 

C01Z 

R03Z 

CN_FLASH 

R04Z 

CN_TH2 

R24K 

R25K 

R21K 

C03H 

C02H 

R34K 

R36K 

R37K 

R35K 

IC01A 

R06F 

R11H 

R07F 

R03H 

R02H 

R02A 

R18P 

C06P 

R10H 

CN-COIL2 

C04S 

D01Z 

C08Z 

C07Z 

R13Z 

R15Z 

C10Z 

17 

16 

R14Z 

R08Z 

C04Z 

C02Z 

18 

19 

22 

23 

C09Z 

20 

21 

SPM2 

W 

P 

W 

D02Z 

R05S 

IC01S 

D01S 

IC02S 

C09S 

R03S 

R07S 

R06S 

C07S 

C09S 

R02S 

R01S 

C05S 

C19Z 

BD02S 

R05J 

R04S 

BD01S 

IGBT 

C10J 

Q03F 

ADDR_S/W 

Q01F 

R01F 

L02D 

C08D 

C05D 

R02D 

C01S 

C10D 

R08M 

R07M 

R06M 

C02M 

R05M 

R09K 

R08K 

R15T 

R04M 

R03M 

R02M 

C02F 

R02F 

Q02F 

R03F 

Q04F 

ZD01F 

IC06M 

R05F 

R04F 

R01M 

C01M 

CN_MOTOR 

C03S 

R01Y 

C02S 

LED02G 

IC02M 

C01F 

R02Y 

C05T 

R08T 

R07T 

C03T 

R21T 

C18Z 

C02C 

R07C 

JIG 

C12H 

C10H 

C07H 

R14T 

C01V 

C02T 

R08H 

C08S 

EEPROM 

R07H 

C11H 

C09H 

C08H 

IC02A 

1 

OSC01B 

R03A 

R02L 

R01L 

C17K 

C16K 

C02A 

CN_TH4 

C06H 

R18K 

R07K 

C05H 

R38K 

CN_TH1 

C04H 

C01H 

R19K 

R39K 

R40K 

R09H 

CN_ADDR2 

CN_TH3 

R23K 

R04H 

R22K 

CN_ADDR1 

R03Y 

D01Y 

C01Y 

R14H R06H 

R03N 

C02N 

R13H 

R12H 

R01H 

C09D 

C03F 

R18T 

R05H 

R01C 

BD01C 

R04C 

R03C 

R02C 

D01C 

C01C 

RY_C/COMP 

R02G 

R01G 

R16H 

Q01C 

R15H 

R04T 

SW1 

OR1 

IC01M 

LED01G 

R02N 

R01N 

BD01N 

D01N 

C06T 

R41K 

D01V 

R08V 

R06C 

R05C 

IC01V 

D02N 

D02C 

C03C 

R07V 

R11K 

R06K 

R20T 

R22T 

C01N 

CN_JIG_S 

R10K 

CN_HEATER 

RY_P/ICE 

CN_HOT GAS CN_4WAY 

RY_FAN(B)_L 

CN_FAN(B) CN_FAN(A) 

CN-COIL1 

RY_FAN(A)_H 

RY_FAN(A)_L 

RY_HEATER 

RY_HOT GAS 

RY_FAN(B)_H 

RY_4WAY 

CN_P/ICE 

TRANS1 

RY_OIL/S 

C09J 

R01V 

CT 

R06V 

R05V 

R04V 

R03V 

R02V 

CN_OIL/S 

CN_PRESS 

IC09K 

R28K 

D04K 

D03K 

D05K 

D06K 

CN_COM1 

CN_COM 

C01J 

FUSE 

R29K 

IC10K 

IC12K 

R14K 

R17K 

R16K 

R15K 

R30K 

R31K 

R32K 

R33K 

C03J C02J 

CN_CP(N) 

N 

L 

CN_CP(L) 

CN_GND1 

R01J 

R03J 

R02J 

J60 

ZD03K 

R26K 

R02K 

IC04K 

IC03K 

ZD06K 

R27K 

ZD07K 

ZD08K 

IC07K IC08K IC05K IC06K 

J59 

NF01J 

J57 

J56 

J55 

J54 

J53 

J58 

R04K 

J51 

J33 

J52 

C01K 

D01K 

C02K 

ZD05K 

R12K 

R01K 

IC11K 

R05K 

ZD02K 

ZD01K 

D02K 

R13K 

ZD04K 

IC01K IC02K 

ZNR02J ZNR01J 

R04J 

C06J C05J 

NTC01K 

R03K 

C04J 

J34 

SURGE 

CN_GND2 

PTC 

C07J 

RY_PWR 

J29 

J27 

NF02J 

J30 

J28 

J32 

J31 

J22 

J21 

J23 

J25 

J24 

C08J 

J26 

WCN_GND3 

C08K 

R35K 

(DISP_C) 

CN_TH4 

IC04K 

ASM:6871A20679 

C16Z 

R03P 

R02P 

R01P 

D03Z 

C12Z 

10 

13 

R17Z 

R16Z 

1 

5 

V 

U 

7 

28(NW) 

29(U) 

30(V) 

9 

8 

(BL) 

(RD) 

27(NV) 

R21P 

24 

25 

26(NU) 

5 

6 

13 

12 

1 

3 

R13Z 

D01Z 

22 

R15Z 

C10Z 

18 

20 

15 

W 

R04P 

31(W) 

32(P) 

(YL) 

R14Z 

D02Z 

D07K 

D08K 

R13P 

CN_LEV1 

R11P 

R12P 

R14P 

IC04D 

C03D 

CN_LEV4 

CN_LEV2 

Q01T 

CN_CENTRAL 

CN_LEV6 

2004.10.24. lab2 

CN_JIG_PC 

CN_LEV5 

C04D 

D01D 

C07D 

C06D 

SMPS 

PWB:6870A90154A 

CN_LEV3 

C01D 

C02D 

L01D 

ASM:6871A10117 

CN_MOTOR 

ADDR_S/W 

L02D 

C08D 

C05D 

R02D 

C10D 

C02F 

R08M 

R07M 

R06M 

R05M 

R04M 

R03M 

R02M 

R01M 

ZD01F 

R04F 

(AIR/PIPE) 

CN_TH2 

IC10K 

L03D 

C01A 

CN_FLASH 

R17P 

R16P 

C02H 

IC12K 

R34K 

R36K 

R37K 

CN_ADDR3 

IC01A 

R15P 

CN_WRITER 

EEPROM 

JIG 

C02C 

R07C 

OSC01B 

C06H 

IC03K 

C01Y 

C05H 

R03Y 

D01Y 

SUC/DISP_A 

(H/SINK) 

CN_TH1 

C01H 

IC08K 

CN_ADDR2 

C04H 

IC07K 

(SUC/DISP_I) 

CN_TH3 

IC05K 

IC06K 

CN_ADDR1 

C03H 

IC09K 

R06F 

C06S 

R02S 

R01S 

IC01S 

IC02S 

R05S 

D01S 

R03S 

C08Z 

C09S 

C19Z 

R05J 

IGBT 

R04S 

+ 

C04S 

~ 

~ 

- 

+ 

C10J 

BD01S 

BD02S 

CN_P/ICE 

CN_4WAY CN_HOT GAS CN_HEATER 

CN_FAN(A) 

RY_P/ICE 

RY_C/FAN 

R01Y 

C01S 

4 

C01F 

R02Y 

CN_HEATER2 

RY_FAN(B)_L 

CN-COIL1 

RY_FAN(A)_L 

RY_FAN(A)_H 

CN-COIL2 

CN_C/COMP2 

RY_HEATER 

RY_4WAY 

C02S 

RY_C/COMP2 

RY_HOT GAS 

C03S 

RY_HEATER2 

RY_FAN(B)_H 

BD01C 

R01C 

R04C 

R03C 

R02C 

D01C 

C01C 

3 

SW1 

Q01C 

NOMAL 

LONG 

PIPE LENGTH 

LED02G 

LED01G 

DISP_B 

R02N 

R01N 

BD01N 

R08V 

R06C 

IC01V 

D02N 

D02C 

D01N 

C03C 

CN_CT/SUB 

CN_TH5/D3 

IC11K 

R05C 

+ 

- 

CN_JIG_S 

C01N 

IC01K IC02K 

TRANS1 

CN_C/FAN 

3 

RY_C/COMP 

RY_OIL/S 4 

C09J 

CT 

R06V 

R05V 

R04V 

R03V 

R02V 

D01V 

R01V 

1 

7 

CN_FAN(B) 

CN_OIL/S 

CN_PRESS 

D04K 

D03K 

D05K 

D06K 

CN_CP(N) 

CN_CP(L) 

C01J 

FUSE 

WCN_GND3 

C08K 

CN_COM 

CN_COM1 

20A 

15A 

(BL) 

WCN_P(N) 

L 

(BR) 

WCN_P(L) 

J59 

C03J 

R14K 

R17K 

R16K 

R15K 

R29K 

R31K 

R30K 

R32K 

R33K 

C02J 

NF01J 

ZD03K 

R02K 

R26K 

ZD06K 

R27K 

ZD07K 

ZD08K 

R28K 

R04K 

J57 

J56 

J55 

J54 

J53 

J52 

J51 

J33 

J58 

N 

(BK) 

CN_GND1 

R01J 

J60 

J34 

C07J 

J27 

ZD01K 

C02K 

ZD05K 

D01K 

ZD04K 

R13K 

R12K 

R01K 

ZNR02J 

ZNR01J 

R04J 

NTC01K 

R03K 

RY_PWR 

4 

3 

R05K 

ZD02K 

C01K 

D02K 

J25 

J24 

J23 

J22 

J21 

J31 

C06J 

C05J 

J29 

J28 

J32 

J30 

(BK) 

CN_GND2 

SURGE 

C04J 

R02J 

R03J 

J26 

PTC 

C08J 

NF02J 

+ 

- 

- +


DISPLAY ASSEMBLY 



- 47 - 


Troubleshooting Guide 


Refrigeration Cycle Diagram 

Solenoid 

Valve(1) 

Solenoid 

Valve(2) 

Field Piping 

Gas 

Field Piping 

Liquid 

Refrigerant Flow 

Cooling 

Heating 

Accumulator 

LEV 

Check 

Valve(2) 

Constant 

Compressor 

Low Pressure 

S/W 

Drier 

Reversing 

Valve 

Check 

Valve(1) 

Oil 

Seperator 

Th2 

Th1 

Inverter 

Compressor 

Th3 

OUTDOOR UNIT 

Heat 

Exchanger 



- 48 - 



2-way, 3-way Valve 

2-way Valve (Liquid Side) 

3-way Valve (Gas Side) 

Flare nut 

To 

piping 

connection 

To outdoor unit 

Hexagonal wrench (4mm) 

Open position 

Closed position 

Flare nut 

To 

piping 

connection 

Valve cap 

Open position 

Closed position 

Service 

port cap 

To outdoor unit 

Pin 

Service 

port 

1. 

2. 

3. 

4. 

5. 

6. 

Works 

Shipping 


(Installation) 

Operation 

Pumping down 

(Transfering) 

Evacuation 

(Servicing) 

Gas charging 

(Servicing) 

Pressure check 

(Servicing) 

Gas releasing 

(Servicing) 

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 

Open 

(with charging cylinder) 

Open 

(with charging cylinder) 



- 49 - 




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. 

Indoor unit 

Liquid side 

Open 

2-way 

valve 

Outdoor unit 

Gas side 

3-way 

valve 

Clsed 

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. 

• 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. 


– 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 port, and 

then recharge with the specified amount of gas from 

a gas cylinder. 



- 50 - 



Pumping Down 

Indoor unit 

Liquid side 

2-Way 

valve 

Open 

Outdoor unit 

Gas side 

3-Way 

valve 

Closed 

CLOSE 

Purge the air 

Lo 

CLOSE 

• 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. 


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. 

(6) Operate the air conditioner at the cooling 

cycle and stop it when the gauge indicates 

1kg/cm 2 g. 

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

position. 

– Do this quickly so that the gauge ends up indicating 

3 to 5kg/cm 2 g. 

(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 port 

nut to a torque of 1.8 kg.m. 

– Be sure to check for gas leakage. 

(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. 



- 51 - 



Re-air Purging 

(Re-installation) 

Indoor unit 

Liquid side 

3-Way 

valve 

Closed 

Outdoor unit 

Gas cylinder 

Gas side 

3-Way 

valve 

Closed 

R22 

OPEN 

Lo 

CLOSE 

• Procedure 

(1) Confirm that both the liquid side valve and the 

gas side valve are set to the closed position. 

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

the service port of the Gas side 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 liquid side 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 liquid side valve. 

(6) Disconnect the charge set and the gas cylinder, 

and set the Liquid side and Gas side 

valves to the open position. 


the valve stems. 

(7) Mount the valve stem nuts and the service 

port nut. 




CAUTION: Do not leak the gas in the air 

during Air Purging. 


– 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/cm 2 g. 



- 52 - 



Balance Refrigerant of the 3-way Valve 

(Gas leakage) 

Indoor unit 

Liquid side 

3-Way 

valve 

Open 

Outdoor unit 

Gas side 

3-Way 

valve 

Open 

OPEN 

Lo 

CLOSE 

• 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 to the service port. 

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

discharge the refrigerant until the gauge indicates 

0 kg/cm 2 G. 

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

pressure when the air conditioner is not running 

is higher than 1 kg/cm 2 G), discharge the refrigerant 

until the gauge indicates 0.5 to 1 

kg/cm 2 G. 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. 



- 53 - 



Evacuation 

(All amount of refrigerant leaked) 

Indoor unit 

Liquid side 

3-Way 

valve 

Open 

Outdoor unit 

Gas side 

3-Way 

valve 

Open 

Vacuum pump 

OPEN 

Lo 

CLOSE 

• Procedure 

(1) Connect the vacuum pump to the center hose 

of charge set 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. 



- 54 - 



Gas Charging 

(After Evacuation) 

Indoor unit 

Liquid side 

3-Way 

valve 

Open 

Outdoor unit 

Gas side 

Charging 

cylinder 

Check valve 

3-Way 

valve 

Open 

Lo 

(1) 

OPEN 

CLOSE 

• 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 reverse 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). 

\ 

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. 

(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. 






- 55 - 



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, be sure to turn off the power and then turn on. 

• Having or not of error code is different from Model. 

Indoor Error 

Error code Description INV TPS 

LED 1 

(Red) 

LED 2 

(Green) 

Indoor 

Status 

00 No Error ON 

01 Indoor Room themistor error 1time OFF 

02 Indoor in-piping sensor error 2times OFF 

05 Communcation error between in and out 5times OFF 

06 Indoor Out-Piping sensor error 6times OFF 

Outdoor Error 

Error Code Description INV TPS 

LED 1 

(Red) 

LED 2 

(Green) 

Indoor 

Status 

21 DC Peak (IPM Fault) 2times 1time OFF 

22 CT 2(Max CT) 2times 2times OFF 

23 DC Link Low Volt. 2times 3times OFF 

24 L_P/Heater Sink 2times 4times OFF 

25 Low voltage / Over voltage 2times 5times OFF 

26 DC Comp Position Error 2times 6times OFF 

27 PSC Fault Error 2times 7times OFF 

28 DC Link High Volt 2times 8times OFF 

32 D-Pipe High (INV) 3times 2times OFF 

33 D-Pipe High (Normal) 3times 3times OFF 

40 CT Sensor (Open/Short) 4times O OFF 

41 INV. D-PipeTh Error(Open/Short) 4times 1time OFF 

44 Outdoor air Th Error(Open/Short) 4times 4times OFF 

45 Cond. Pipe Th Error(Open/Short) 4times 5times OFF 

46 Suction Pipe Error(Open/Short) 4times 6times OFF 

47 Const D-pipe Th Error(Open/Short) 4times 7times OFF 

51 Capacity over 5times 1time OFF 

53 Signal error (Indoor ↔ Outdoor) 5times 3times OFF 

60 EEPROM Check Sum Error 6times O OFF 

61 Cond. Pipe High 6times 1time OFF 

62 Heatsink High 6times 2times OFF 

63 Cond. Pipe Low 6times 3times OFF 

65 Heatsoml Th error (Open/Short) 6times 5times OFF 



- 56 - 



Cycle Troubleshooting Guide 

Trouble analysis 

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

Temp. Difference 

Operating Current 

Temp. difference : approx. 0°C 

Current 

: less than 80% of 

rated current 

Temp. difference : approx. 8°C 

Current 

: less than 80% of 

rated current 

Temp. difference : less than 8°C 

Current 

: near the rated 

current 

All amount of refrigerant leaked out. 

Check refrigeration cycle. 

Refrigerant leakage 

Clog of refrigeration cycle 

Defective compressor 

Excessive amount of refrigerant 

Temp. difference : over 8°C 

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. 

Suction pressure Temperature 

(Compared with (Compared with Cause of Trouble Description 

the normal value) the normal value) 

High Defective compressor Current is low. 

Higher 

Normal Excessive amount of High pressure does not quickly 

refrigerant 

rise at the beginning of operation. 

Insufficient amount of 

Lower Higher refrigerant(Leakage) 

Clogging 

Current is low. 

NOTICE 

1. The suction pressure is usually 4.5~6.0 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. 



- 57 - 



Electronic Parts Troubleshooting Guide 

1. AS-W306MMH0 

❇ Refer to electronic contorol device drawing & schematic diagram. 

Trouble 1 

The Product doesn’t operate at all. 

Turn off the main power and wait until LED on outdoor PCB is off. 

Turn on the main power again. 

Does "Beeping" sound is made from the indoor unit? 

NO 

Check the voltage of power(AC220V/AC240V, 50Hz). 

• The voltage of main power. 

• The voltage applied to the unit. 

• The connecting method of Indoor/Outdoor connecting cable (each color) 

• The P.W.B. Ass'y 

(Fuse, Noise Filter, Power Transformer, IC04D, etc.) 

YES 

• Primarily, the operating condition 

of Micom is O.K. 

• Check CN-DISP 

The operation check of the P.C.B. Ass'y 

Procedure 

1) The input voltage of power transformer. 

2) The output voltage of power 

transformer. 

3) IC04D(7805) 

4) IC01A(KIA7036) 

Specification 

1) AC230V ± 30V 

: Check the rated voltage 

2) 14V ± 3V 

3) DC5V 

4) The voltage of micom pin 21 

: DC4.5V↑ 

Remedy 

1) Replace 

power transfomer. 

2) Replace 

power transfomer. 

3) Replace IC04D. 

4) Replace IC01A. 



- 58 - 



Trouble 2 

Product doesn't 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. 

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 as force.) 

Caused by the remote controller. 

Caused by other parts except 

the remote controller 

When the mark ( ) is displayed in LCD 

screen, replace battery. 

Check the contact of CN-DISP 1 connector 

When the detect switch (double key) inside the 

remote controller door is fault, it is impossible to 

operate temperature regulating(▲ / ▼) and wind 

speed selecting. 

Check DISP PWB Ass'y 

-Voltage between CN1 ➀ - ➆ : DC +5V 

Check the Display PWB Ass'y 

• Check receiver ass'y 



- 59 - 



Trouble 3 

When indoor Fan does not operate. 

Turn off main power. 

Check the connection of CN-MOTOR. 

Check the Fan Motor. 

Check the Fuse(AC250V, T2A). 

Check the related circuit of indoor Fan Motor. 

• The pin No. 42 of micom and the part for driving SSR.(IC01M) 

• Check the related pattern. 

• Check the SSR. 

- SSR Open: Indoor Fan Motor never operate. 

- SSR short: Indoor Fan Motor always operates in case of ON or OFF. 

Turn on the main power 

Check the SSR high speed operation by remote control. 

(the Indoor Fan Motor is connected) 

The voltage of Pin No 1(orange) and 3(black) of CN-FAN. 

About AC 160V over 

About AC 50V over 

SSR is not damaged 

Check SSR 



- 60 - 



Trouble 4 

When the louver does not operate. 

• 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 or CN-L/R1 Connector 

• Check the soldering condition(on PCB) of CN-L/R1 or CN0L/R Connector 

Check the operating circuit of the vertical louver 

• Confirm that there is DC +12V between pin ➀ of CN-U/D, CN-L/R1 and GND. 

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

- Between 33 , 34 , 35 and 36 of MICOM - Between 37 , 38 , 39 and 40 of MICOM 

- Between 4 , 5 , 6 and 7 of IC02M - Between 1 , 2 and 3 of IC02M 

If there are no problems after above checks. 

• Confirm the assembly condition that are catching and interfering parts in the link of the 

vertical louver 



- 61 - 



General Information 

■ Error Indicator (Indoor) 

• The function is to self-diagnosis air conditioner and express the troubles if there is any trouble. 

• Error mark is displayed on display window of indoor units and wired-remote controller, and LED of outdoor unit 

control board. 

• If more than two troubles occur simultaneously, lower number of error code is first displayed. 

• After error occurs, if error is released, error LED is also released simultaneously. 

1 digit 

10 digit 

■ Indoor Error 

Error 

code 

01 

Contents 

Air sensor (open/short) 

Case of error 

Open / Short 

Indoor 

Status 

Off 

02 

Inlet pipe sensor 

Open / Short 

Off 

05 

Communication(Indoor ↔ Outdoor) 

Communication Poorly 

Off 

06 

Outlet pipe sensor 

Open / Short 

Off 



- 62 - 



■ Error Indicator (Outdoor) 

Outdoor Error 

Ex) Error 21 (DC Peack) 

LED01G 

(RED) 

LED02G 

(GREEN) 

2 Times 

2 Times 

2 Times 

1 Sec. 

1 Sec. 1 Sec. 

1 Time 1 Time 1 Time 

2 Sec. 2 Sec. 

Error 

code 

Contents 

LED01G 

(Red) 

LED02G 

(Green) 

Case of error 

Outdoor 

Status 

21 

IPM Fault (Compressor Over current) 

2 times 

1 time 

Compressor malfunction,IPM Fault 

Off 

22 

CT 2(Max. Current) 

2 times 

2 times 

Current is 14A 

Off 

23 

DC Link Low Volt. 

2 times 

3 times 

DC Link volt. Is 140V 

Off 

24 

Low / High press 

2 times 

4 times 

Low / High press switch OPEN 

Off 

25 

AC Low / AC High Volt. 

2 times 

5 times 

Abnormal AC volt. Input. 

Off 

26 

DC Compressor Position 

2 times 

6 times 

Off 

27 

PSC Fault 

2 times 

7 times 

Off 

28 

DC Link High Volt 

2 times 

8 times 

Off 

Off 

32 

Discharge Pipe Temp. High (INV) 

3 times 

2 times 

Off 

Off 

33 

Discharge Pipe Temp. High (Cons.) 

3 times 

3 times 

Off 

Off 



- 63 - 



■ Error Indicator (Outdoor) 

Outdoor Error 

Error 

code 

Contents 

LED01G 

(Red) 

LED02G 

(Green) 

Case of error 

Outdoor 

Status 

40 

CT Circuit 

4 times 

CT Circuit malfunction 

Off 

41 

D-pipe sensor INV. (open/ short) 

4 times 

1 time 

Open / Short 

Off 

44 

Air sensor (open/ short) 

4 times 

4 times 

Open / Short 

Off 

45 

Cond. Pipe sensor (open/ short) 

4 times 

5 times 

Open / Short 

Off 

46 

Suction pipe sensor (open/ short) 

4 times 

6 times 

Open / Short 

Off 

47 

D-pipe sensor Cons. (open/ short) 

4 times 

7 times 

Open / Short 

Off 

51 

Over capacity 

5 times 

1 times 

Over combination 

Off 

53 

Communication (Indoor 

Outdoor) 

5 times 

3 times 

Communication Poorly 

Off 

60 

EEPROM check sum 

6 times 

Check sum mismatching 

Off 

61 

Cond. Pipe sensor temp. high 

6 times 

1 time 

Cond. Temp. high 

Off 

62 

Heat sink sensor temp. high 

6 times 

2 times 

Heat sink temp. high 

Off 

65 

Heat sink sensor (open/ short) 

6 times 

5 times 

Open / Short 

Off 



- 64 - 



1) Troubleshooting CH01, CH02, CH06 

Display 

code 

Title Cause of error Check point & Normal condition 

01 

Indoor air sensor 

• Open / Short 

• Soldered poorly 

• Internal circuit error 

Normal resistor : 10KΩ/ at 25°C (Unplugged) 

Normal voltage : 2.5Vdc / at 25°C (plugged) 

02 

Indoor inlet pipe sensor 






06 

Indoor outlet pipe sensor 






10kΩ 

2.5Vdc 

Ω 

V 

Check the resistance 

Check the voltage 

Check Point 

1. Unplug the sensor on Indoor unit PCB. 

2. Estimate the resistance of each sensor. 

3. If the resistance of the sensor is 10KΩ/ 5KΩ at 25°C, then sensor is normal. 

4. If the resistance of the sensor is 0 KΩ or ∞, then sensor is abnormal. → Change the sensor. 

5. Plug the sensor on Indoor unit PCB and Power ON. 

6. Estimate the voltage of each sensor. 

7. If the voltage of the sensor is 2.5Vdc at 25°C, then sensor is normal. 

8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. → Repair or Change the PCB. 



- 65 - 



2) Troubleshooting CH05, CH53 

Display 

code 

04 

/ 

53 


Communication 

(Indoor → Outdoor) 

• Communication poorly 

• Power input AC 230V. (Outdoor, Indoor) 

• The connector for transmission is disconnected. 

• The connecting wires are misconnected. 

• The GND1,2, 3 is not connected at main GND. 

• The communication line is shorted at GND. 

• Transmission circuit of outdoor PCB is abnormal. 

• Transmission circuit of indoor PCB is abnormal. 

Check Point 

1. Check the input power AC230V. (Outdoor, Indoor unit) 

2. Check the communication wires are correctly connected. 

→ Adjust the connection of wire 

→ Confirm the wire of “Live”, “Neutral” 

3. Check the resistance between communication line and 

GND. (Normal : Over 2MΩ) 

4. Check the connector for communication is correctly 

connected. 

5. Check the connection of GND1, GND2, GND3 and main 

GND. 

6. If one indoor unit is operated normally, outdoor PCB is no 

problem. 

→ Check the another indoor unit. 

* CH05 is displayed at indoor unit, CH53 is displayed at outdoor 

unit. 



- 66 - 



3) Troubleshooting CH21 

Display 

code 

21 DC Peak 


• Instant over current 

• Over Rated current 

• Poor insulation of IPM 

• An instant over current in the U,V,W phase 

- Comp lock 

- The abnormal connection of U,V,W 

• Over load condition 

- Overcharging of refrigerant 

- Pipe length. 

• Poor insulation of compressor 

Comp 

U 

Resistance(Ω) at 20°C 

V 

W 

Ω 

Terminal 

U-V 

V-W 

W-U 

Inverter 

comp. 

0.64 

0.64 

0.64 

Constant 

comp. 

0.8 

0.8 

0.8 

Comp 

Copper 

pipe 

Ω 

Resistance(Ω) at 20°C 

Terminal 

U-GND 

V-GND 

W-GND 

Inverter 

comp. 

2MΩ 

2MΩ 

2MΩ 

Constant 

comp. 

2MΩ 

2MΩ 

2MΩ 

Check Point 

1. Check the wire connection. (U,V,W) 

2. Check the load condition. (Refrigerant, Pipe length, …) → Adjust the load condition 

3. Check the electricity leakage of the compressor. → Normal : Over 2MΩ. 

4. Check the resistance of compressor. → Normal : 0.65Ω(INV), 0.8Ω(Cons.) → No difference at each terminal. 

5. Check the insulation from water at IPM part. → Check the trace of water. 

6. Check the IPM circuit. 



- 67 - 



4) Troubleshooting CH22 

Display 

code 

21 


Max. C/T 

Over current (13A ) 

Malfunction of compressor 

Blocking of pipe 

Low voltage input 

Refrigerant, pipe length, blocked, … 

22 

C/T 

Internal circuit 

Initial current error 

Malfunction of current detection circuit. 

(Open / Short) 

The voltage of “C01N” Is 4.0Vdc(25A) . 

V 

Check Point 

1. Check the power source. 

2. Check the fan operation is right. 

3. Check the current. 

+ - 

+ - 

- 

+ 

4. Check the install condition. 

5. Check the internal circuit. (C/T, Diode, Resistor) 



- 68 - 




Display 

code 


23 

DC Link 

Low voltage. 

• DC link volt. is 

140Vdc . 

• Check the power source. 

• Check the components. 

28 

DC Link 

High voltage 

• DC link volt. is 

420Vdc . 



Check Point 


2. Check the components 

(B/Diode, Reactor, PSC Parts ) 

V 



- 69 - 




Display 

code 


24 

Press S/W Open 

• Low / High press 

S/W open. 

• Check the connection of “CN_Press”. 


25 

Input voltage 

• Abnormal Input voltage 

(140Vac , 300Vac . 



TRANS1 

50Hz, DC12V 

CN PRESS 

CN TRNAS1 

Check Point 

• CH 24 

1. Check the connection of “CN_PRESS” 

2. Check the install condition for over load. 

3. Check the SVC V/V open. 

4. Check the leakage of refrigerant. 

• CH 25 



(Trans1, B/Diode, Diode, Resistance) 



- 70 - 




Display 

code 


26 

DC Compressor 

Position 

• Compressor 

position detect error 

• Check the connection of comp wire “U,V,W” 

• Malfunction of compressor 

• Check the component of “IPM”, detection parts. 

27 

PSC Fault 

• Over current at “IGBT” 

• Check the component of “IGBT” . 


E 

C 

B 

C 

B 

E 

Check Point 

• CH 26 

1. Check the connection of “U,V,W” 

2. Check the insulation of IPM part. 

3. Check the compressor. (same with CH21) 

• CH 27 

1. Check the component of “IGBT” 


(IGBT, R04S, NF1, BD02S) 



- 71 - 




Display 

code 

32 


D-pipe (Inverter) 

temp. high 

(105°C ) 

• Discharge sensor 

(Inverter) temp. high 

• Check the discharge pipe sensor for INV. 

• Check the install condition for over load. 

• Check the leakage of refrigerant. 

• Check the SVC V/V open. 

33 

D-pipe (Constant) 

temp. high 

(105°C ) 

• Discharge sensor 

(Cons.) temp. high 

• Check the discharge pipe sensor for Cons. 

• Check the install condition for over load. 

• Check the leakage of refrigerant. 

• Check the SVC V/V open. 

D-Pipe temp. 

Toff(105) °C 

T2(95) °C 

T1(90) °C 

COMP Frequency 

(Hz) 

Normal 

Normal 

OFF 

LEV Openness 

(Pulse) 

Normal 

Normal 

OFF Control 

Check Point 

• CH 32 




• CH 33 




4. Check the constant compressor. (same with CH21) 



- 72 - 



9) Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65 

Display 

code 


41 

D-pipe sensor (Inverter) 




• Normal resistor : 200KΩ / at 25°C (Unplugged) 

• Normal voltage : 4.5Vdc / at 25°C (plugged) 

44 

Air sensor 






45 

Condenser Pipe sensor 






46 

Suction Pipe sensor 






47 

D-pipe sensor (Constant) 






65 

Heat sink sensor 






Ω 

Check Point 

1. Estimate the resistance of each sensor.(Unplugged) 

2. Estimate the voltage of each sensor.(Plugged) 

3. If the resistance of the sensor is 0 kΩ or ∞, then sensor is abnormal. 

If the voltage of the sensor is 0 V or 5Vdc, then sensor is abnormal. 



- 73 - 




Display 

code 


51 

Over capacity 

• Over capacity 

Combination 

• Check the indoor unit capacity. 

• Check the combination table. 

60 

EEPROM 

Check sum 

• Check sum error 

• Check the PCB ASM P/No. 

• Check the poor soldering. 

Model Gross max. capacity Max. single indoor unit capacity 

ASUW306MMH0 

ASUW306MMH1 

30k 

30k 

Check Point 

• CH 51 

1. Check the indoor unit capacity. 

• CH 60 

1. Check the insertion condition of EEPROM. 

2. Check the poor soldering 



- 74 - 




Display 

code 


61 

Condenser 

pipe sensor 

temp. high 

• Condenser pipe sensor 

detected high 

temp.(65°C) 

• Check the load condition. 

• Check the sensor of Condenser pipe sensor. 

62 

Heat sink sensor 

temp. high 

• Heat sink sensor 

detected high 

temp.(85°C) 

• Check the fan is locked. 

• Check the sensor of heat sink. 

Heat Sink temp. 

Toff °C 

T2 °C 

T1 °C 

COMP Frequency 

(Hz) 

Normal 

Normal 

OFF 

Normal 

Check Point 

• CH 61 


(Refrigerant, Pipe length, Blocked, …) 

• CH 62 

1. Check the fan is locked. 

2. Check the Outdoor temp. is very high. 



- 75 - 


Exploded View 


Indoor Unit: AS-W306MMH0, AS-W306MMH1 

342800A 

131410 

733010 

359011A 

159830 

135311 

342800B 

146811B 

354210 

359011B 

346810 

35211B 

352150 

268711B 

266090 

147581 

146811A 

263230A 

135313 

249951 

W0CZZA 

267110 

152302 

135314 

152313 

135316 

135315 

268711A 

152302 



- 76 - 



Outdoor Unit: AS-W306MMH0, AS-W306MMH1 

349480 

435301 

566000 

552116 

435512 

558511 

548490 

552204 

559010 

437210 

552111 

546810A 

546810B 

447910 

430410 

349600 

649950 

554160A 

550140 

554031 

268711F 

549810 

137213A 

554160B 

552203B 

552203A 

435300 

137213B 

435511 

263230B 

263230C 

263230D 



- 77 - 


P/NO : 3828A20347G July, 2008

Room Air Conditioner SVC MANUAL(Exploded ... - Jordans Manuals

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