Room Air Conditioner - Appliance Factory Parts

LG RoomAir ConditionerSERVICE MANUAL

LG

CAUTION

website http://www.lgservice.com

• BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

MODELS: LA090CP LA120CP

2 Room Air Conditioner

Air Conditioner Service Manual

TABLE OF CONTENTSLG Model Name ...............................................................................................................................................3Safety Precautions..........................................................................................................................................4Dimensions .....................................................................................................................................................8

Symbols used in this Manual......................................................................................................................8Indoor Unit..................................................................................................................................................8Outdoor Unit ...............................................................................................................................................9

Installation .....................................................................................................................................................10Select the Best Location .........................................................................................................................10Piping Length and Elevation.....................................................................................................................10Preparing Work for Installation .................................................................................................................11Fixing the Indoor Unit ...............................................................................................................................12Drill a Hole in the wall...............................................................................................................................12Flaring Work.............................................................................................................................................13Connecting the Pipings ............................................................................................................................14Connecting the Cables to the Indoor Unit ................................................................................................17Connecting the Cables to the Outdoor Unit..............................................................................................18Checking the Drainage.............................................................................................................................19Forming the Piping ...................................................................................................................................19Air Purging ...............................................................................................................................................20Air Purging with Vacuum Pump................................................................................................................20Front Panel Assembly ..............................................................................................................................22Test Running ............................................................................................................................................23

Operation ......................................................................................................................................................24Function of Controls .................................................................................................................................24Display Function.......................................................................................................................................25Self-diagnosis Function............................................................................................................................25Remote Control Operations......................................................................................................................26

Disassembly ..................................................................................................................................................27Indoor Unit................................................................................................................................................27

Troubleshooting Guide .................................................................................................................................29Refrigeration Cycle Diagram ....................................................................................................................292-way, 3-way Valve ...................................................................................................................................30Cycle Parts ...............................................................................................................................................37Electronic Parts ........................................................................................................................................38

Schematic Diagram .......................................................................................................................................47Electric control Device..............................................................................................................................47Wiring Diagram.........................................................................................................................................49Components Location ..............................................................................................................................50

Product Specifications ................................................................................................................................53Exploded View ..............................................................................................................................................54

Indoor Unit...............................................................................................................................................54Outdoor Unit ............................................................................................................................................55

Replacement Parts List ................................................................................................................................56Indoor ......................................................................................................................................................56Outdoor ....................................................................................................................................................57

Service Manual 3

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: IndiaRefrigerant A: Chang-won R410A Z: Brazil

C: Chang-won R407C D: IndonesiaT: ChinaU: China R410A

X: MexicoK: Turkey R22

V: Vietnam E: Turkey R410AS: Out Sourcing H: Thailand

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

3 Cooling/Heating/Inverter A~Z C: Cooling onlyH: Heat pumpX: C/O + E/HeaterZ: H/P + E/Heater

V: AC Inverter C/ON: AC Inverter H/PQ: DC Inverter C/OW: DC Inverter H/P

4, 5 Capacity 0~9 Cooling/Heating CapacityEx. "09" →9,000 Btu/h

6 Electric Range 1~9 1: 115V/60Hz, A: 220V, 50Hz, 3PhaseA~Z 2: 220V/60Hz B: 208~230V, 60Hz, 3Phase

3: 208-230V/60Hz C: 575V, 50Hz, 3Phase5: 200-220V/50Hz D: 440~460, 60Hz, 3Phase6: 220-240V/50Hz E: 265V, 60Hz7: 110V, 50/60Hz F: 200V, 50/60Hz8: 380-415V/50Hz9: 380-415V/60Hz

7 Chassis A~Z Name of Chassis of UnitEx. LSP →SP Chassi

s8 Look A~Z Look,

Color (Artcool Model)

9 Function A~Z

10 Serial No. 1~9 LG Model Development Serial No.

* ARTCOOL COLOR

Basic ABasic+4Way BPlasma Filter CPlasma Filter+4 Way DTele+LCD ETele+LCD+Nano plasma+4Way FNano Plasma F+(A/changeove)+A/clean+Low A GNano Plasma F+(A/changeove)+A/clean+4way+Low A HTele+LED+4way IInternet JPlasma F+4Way+Oxy generator KNano Plasma F+(A/changeove)+A/clean LNano Plasma F+(A/changeove)+A/clean+4way MNano Plasma F+(A/changeove)+A/clean+PTC NNano Plasma F+(A/changeove)+Autoclean+4way+PTC PNano Plasma F+(A/changeove)+A/clean+4way+Low A+PTC QNegative ION+A/Clean R(Nano)Plasma+Negative ION+A/Clean S4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean TNano Plasma F+4Way+(A/changeove)+A/clean+Oxy generator U4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean+Oxy generator VDry Contact WWired Remocon 8

R MirrorW WhiteB BlueD WoodM MetalC Cherry

N WalnutA GoghS SisleyQ QuranK Mecca

CHASSIS LookDKLGMNDP

DivisionPanel Type(Deluxe)Fighting 'Look'(LG1)(LG2)-SEMI PANELOEM1OEM2Panel Type(Deluxe)LG3

S4/S5S6SQSRST

2003~


Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions mustbe followed. Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is

classified by the following indications.

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

This symbol indicates the possibility of death or serious injury.

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

Be sure not to do.

Be sure to follow the instruction.

Always perform grounding. Don’t use a power cord, a plugor a loose socket which isdamaged.

For installation of the product,always contact the service center ora professional installation agency.

• Otherwise, it may cause electricalshock.

• Otherwise, it may cause a fire orelectrical shock.

• Otherwise, it may cause a fire, elec-trical shock, explosion or injury.

Securely attach the electricalpart cover to the indoor unitand the service panel to theoutdoor unit.

Always install an air leakagebreaker and a dedicatedswitching board.

Do not keep or use flammablegases or combustibles nearthe air conditioner.

• If the electrical part cover of theindoor unit and the service panel ofthe outdoor unit are not attachedsecurely, it could result in a fire orelectric shock due to dust, water, etc.

• No installation may cause a fire andelectrical shock.

• Otherwise, it may cause a fire or thefailure of product.

Installation

Wax Thinner

Service Manual 5

Safety Precautions

Operation

Do not modify or extend thepower cord randomly.

Take care so that the powercord may not be pulled duringoperation.

Unplug the unit if strangesounds, smell, or smokecomes from it.



• Otherwise, it may cause electricalshock or a fire.

• Sharp edges may cause injury. • It will cause an electric shock or afire due to heat generation.


Use caution when unpackingand installing.

Do not share the outlet withother appliances.

Do not use the damagedpower cord.

Ensure that an installationframe of the outdoor unit isnot damaged due to use for along time.

Do not disassemble or repairthe product randomly.

Do not install the product at aplace that ther is concern offalling down.

• It may cause injury or an accident. • It will cause a fire or electrical shock. • Otherwise, it may result in personalinjury.


Safety Precautions

Keep the flames away. Take the power plug out if neces-sary, holding the head of the plugand do not touch it with wet hands.

Do not use the power cordnear the heating tools.

• Otherwise, it may cause a fire. • Otherwise, it may cause a fire orelectrical shock.

• Otherwise, it may cause a fire andelectrical shock.

Do not open the suction inletof the indoor/outdoor unit dur-ing operation.

Do not allow water to run intoelectrical parts.

Never touch the metal parts ofthe unit when removing the fil-ter.

• Otherwise, it may electrical shockand failure.

• Otherwise, it may cause the failure ofmachine or electrical shock.

• They are sharp and may causeinjury.

Do not step on the indoor/outdoor unit and donot put anything on it.

Do not place a heavy object on the power cord.

• It may cause an injury through dropping of the unit orfalling down.

• Otherwise, it may cause a fire or electrical shock.

When the product is submerged into water,always contact the service center.

Take care so that children may not step on theoutdoor unit.

• Otherwise, it may cause a fire or electrical shock. • Otherwise, children may be seriously injured due tofalling down.

Service Manual 7

Safety Precautions

Installation

Install the drain hose toensure that drain can besecurely done.

Install the product so that thenoise or hot wind from theoutdoor unit may not causeany damage to the neighbors.

Always inspect gas leakageafter the installation and repairof product.

• Otherwise, it may cause water leak-age.

• Otherwise, it may cause dispute withthe neighbors.

• Otherwise, it may cause the failure ofproduct.

Wax Thinner

Keep level parallel in installing the product. Avoid excessive cooling and perform ventila-tion sometimes.

• Otherwise, it may cause vibration or water leakage. • Otherwise, it may do harm to your health.

Use a soft cloth to clean. Do not use wax, thin-ner, or a strong detergent.

When gas leaks, open the window for ventila-tion before operating the unit.

• The appearance of the air conditioner may deteriorate,change color, or develop surface flaws.

• Otherwise, it may cause explosion, and a fire.

Operation


Dimensions

Dimensions

Pipe Hole Fix Hole

Hanger Hole

H

W D

W mm 570

H mm 568

D mm 137

Model

DimensionINDOOR UNIT

Indoor Unit

This symbol alerts you to the risk of electric shock.

This symbol alerts you to hazards that may cause harm to theair conditioner.

This symbol indicates special notes.NOTICE

Symbols used in this Manual

Service Manual 9

W L2

L3

L1 D

H

L4

L5Gas side

(3-way valve)

Liquid side(2-way valve)

MODEL9K, 12K Models

DIM unit

W mm 770

H mm 540

D mm 245

L1 mm 285

L2 mm 64

L3 mm 518

L4 mm 10

L5 mm 100

Dimensions


Installation

Installation

Indoor unit• Do not have any heat or steam near the unit.

• Select a place where there are no obstacles infront of the unit.

• Make sure that condensation drainage can be con-veniently routed away.Do not install near a doorway.

• Ensure that the space around the left and right ofthe unit is more than 50cm. The unit should beinstalled as high on the wall as possible, allowing aminimum of 10cm from ceiling.

• Use a stud finder to locate studs to prevent unnec-essary damage to the wall.

Outdoor unit• If an awning is built over the unit to prevent direct

sunlight or rain exposure, make sure that heatradiation from the condenser is not restricted.

• Ensure that the space around the back and sidesis more than 10cm. The front of the unit shouldhave more than 70cm of space.

• Do not place animals and plants in the path of thewarm air.

• Take the air conditioner weight into account andselect a place where noise and vibration are mini-mum.

• Select a place so that the warm air and noise fromthe air conditioner do not disturb neighbors.

More than 10cm

More than 50cm

More than 2m

Morethan 50cm

More than 10cm More than 10cm

More than 60cm

More than 60cm

More than 70cm

CAUTION: Install the indoor unit on the wallwhere the height from the floor is more than 2meter.

CAUTION:

• Capacity is based on standard length and maximumallowance length is on the basis of reliability.

• Oil trap should be installed every 5~7 meters.

If the piping length is more than 5m

Outdoor unit

Indoor unit

A

B Outdoor unit

Indoor unit

A

B

AOil trap

Outdoor unit

Indoor unitB

I

Selection of the Best Location

Piping Length and Elevation

5k~14k3/8"(Ø9.52) 1/4"(Ø6.35) 4 or 7.5 7 15 20

1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5 7 15 20

1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5 15 30 20

18k~28k 5/8"(Ø15.88) 1/4"(Ø6.35) 4 or 7.5 15 30 20

5/8"(Ø15.88) 3/8"(Ø9.52) 4 or 7.5 15 30 30

30k~38k5/8"(Ø15.88) 3/8"(Ø9.52) 7.5 15 30 30

3/4"(Ø19.05) 3/8"(Ø9.52) 7.5 15 30 50

Pipe SizeCapacity(Btu/h) GAS LIQUID

Max. LengthA (m)

AdditionalRefrigerant

(g/m)

Max.Elevation

B (m)

StandardLength

(m)

Service Manual 11

Remove pipe cover and side cover1. Remove two screws(for fixing pipe cover)2. Pull up the side cover of desired connecting direction,

and then side cover is separated.3. Pick the pipe hole of the side cover.

CAUTION: After removing the pipehole, cut the burr for safety.

When making pipe path through rearwall, you don’t need to pick the pipe hole.

Drain hose junction1. Remove the rubber stopple in the desired drain direc-

tion.

2. Insert drain hose into the handle of drain pan, andjoin drain hose and connecting hose according to thefigure by.

NOTICE

Open front panel1. Push the front panel backward and lift it up to remove the two screws.

2. As soon as you lift the both lower parts of panel front, you can hear the sound from panel front. At this momentpanel front is separated

3. After pulling down this panel a bit, separate connecting wire from the product.

Installation

Panel Front Connector

Pipe hole

Side cover

rubber cap

Only thedesired direction

Connectingpart

Adhesive

Drainhose

Preparing Work for Installation


Installation

Fixing the Indoor Unit

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

Drill a Hole in the Wall

5-7m

m

(0.2

~0.

3")

Indoor

WALL

Outdoor

Plastic anchors

INSTALLATION GUIDE MAP

10mmINSTALLATION GU

INSTAIIATION GUIDE MAP

Plastic anchors



Hanger hole(Rear side of the product)

2. Make a hole with a diameter of 6mm and depth of 30-35mm by piercing a screw point.

3. Drive the fore plastic anchors into drilled points.

4. Hang the hole of product at the upper screws, and remove the map. (Falling attention)

5. Check the fixed product with light power.

1. Attach an Installation guide map on the desired surface.

6. Look at suited horizon by horizontal meter on the horizontal setting line, and fix lightly the map by adhesive tape.

7. Drill the pierted part as a diameter of 50mm for connecting piping. (In case of piercing rear surface)

8. First, Drive the two points of the upper parts by screws. (Leave 10mm for hanging the product)

9. Drive the lower parts after facing the hole of product with plastic anchors, and fix completely the upper screws.

10. In case of nothing wrong, connect the pipe and the wire. (Refer to installation manual)

Horizontality


Service Manual 13

Installation

Flaring Work

Cutting the pipes and the cable.1. Use the piping kit accessory or the pipes purchased

locally.

2. Measure the distance between the indoor and the out-door unit.

3. Cut the pipes a little longer than measured distance.

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

Removing burrs1. Completely remove all burrs from the cut cross section of

pipe/tube.

2. Put the end of the copper tube/pipe in a downward direc-tion as you remove burrs in order to avoid dropping burrsinto the tubing.

Putting nut on• Remove flare nuts attached to indoor and outdoor unit,

then put them on pipe/tube having completed burrremoval.(not possible to put them on after flaring work)

Flaring work1. Firmly hold copper pipe in a die in the dimension shown

in the table below.

2. Carry out flaring work with the flaring tool.

Copperpipe 90° Slanted Uneven Rough

Pipe

Reamer

Point down

Flare nut

Copper tube

mm inch mmØ6.35 1/4 0~0.5Ø9.52 3/8 0~0.5Ø12.7 1/2 0~0.5Ø15.88 5/8 0~1.0Ø19.05 3/4 1.0~1.3

Outside diameter A

Bar

Copper pipe

Clamp handleRed arrow mark

Cone

Yoke

Handle

Bar"A"

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


Installation

Check1. Compare the flared work with the figure by.

2. If a flared section is defective, cut it off and do flaringwork again.

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

If the drain hose is routed inside the room, insulate the hose with an insulationmaterial* so that dripping from "sweating"(condensation) will not damage furnitureor floors.*Foamed polyethylene or equivalent is recommended.

NOTICE

Route the indoor tubing and the drain hose in thedirection of rear left or right

Tape the tubing, drain hose and the connectingcable. Be sure that the drain hose is located at thelowest side of the bundle. Locating at the upperside can cause drain pan to overflow inside the unit.

Inclined

Inside is shiny without scratches

Smooth all round

Even lengthall round

Surfacedamaged

Cracked Uneventhickness

= Improper flaring =

Connecting the Pipings

Drain hose

Connectingcable

Gas side piping

Liquid side pipingDrain hose

Loop

Service Manual 15

Connecting the pipings with the indoor unitand drain hose with drain pipe1. Align the center of the pipings and sufficiently tighten

the flare nut by hand.

2. Tighten the flare nut with a wrench.

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

Wrap the insulation material around theconnecting portion.1. Overlap the connection pipe insulation material and

the indoor unit pipe insulation material. Bind themtogether with vinyl tape so that there may be no gap.

2. Wrap the area which accommodates the rear pipinghousing section with vinyl tape.

3. Bundle the piping and drain hose together by wrap-ping them with vinyl tape over the range within whichthey fit into the rear piping housing section.

Installation

Wrap with vinyl tape

Drain hose

Pipe

Vinyl tape(wide)

Indoor unit tubing Flare nut Pipes

Wrench

Indoor unit tubing

Connection pipe

Flare nut

Open-end wrench (fixed)mm inch kg.mØ6.35 1/4 1.8Ø9.52 3/8 4.2Ø12.7 1/2 5.5Ø15.88 5/8 6.6Ø19.05 3/4 6.6

Outside diameter Torque

Vinyl tapeAdhesive

Drain hose

Indoor unit drain hose

(narrow)

Plastic bands Insulation material

Vinyl tape(narrow)

Connectionpipe

Connecting cable

Vinyl tape(wide)

Wrap with vinyl tape

Indoor unit pipe

Pipe


Installation

OutdoorAlign the center of the pipings and sufficiently tightenthe flare nut by hand.

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

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

mm inch kg.mØ6.35 1/4 1.8Ø9.52 3/8 4.2Ø12.7 1/2 5.5Ø15.88 5/8 6.6Ø19.05 3/4 6.6

Outside diameter Torque

Outdoor unit Gas side piping(Bigger diameter)

Liquid sidepiping(Smallerdiameter)

Torque wrench

Service Manual 17

Installation

• Connect the cables to the indoor unit by connecting the wires to the terminals on the control boarddividually according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and theterminal No. are the same as those of the indoor unit.)

• Before connecting the cables to the terminal block, remove the cables in the holder of the control cover anddo it.

Connecting the Cables to the Indoor Unit.

CAUTION: • The above circuit diagram is subject to change without notice. • The earth wire should be longer than the common wires.• When installing, refer to the circuit diagram behind the panel front of the indoor unit.• Connect the wires firmly so that they may not be pulled out easily.• Connect the wires according to color codes, referring to the wiring diagram.

CAUTION: If a power plug is notused, provide a circuit breakerbetween power source and the unitas shown by.

CAUTION: The power cord connected to the "A" unit should be selected according tothe following specifications(Type "B" approved by HAR or SAA).

The power connecting cable connecting the indoor and outdoor unit should be selectedaccording to the following specifications (Type "B" approved by HAR or SAA).

Air Conditioner

Main power source

Circuit BreakerUse a circuit breakeor time delay fuse.

5k~9k 12k 14k~18k 24k~28k 30k, 32k 36k, 38k

0.75 1.0 1.5 2.5 2.5 5.5

Unit(A) Indoor Indoor Indoor Indoor Outdoor Outdoor

Cable Type(B) H05VV-F H05VV-F H05VV-F H05VV-F H05RN-F H05RN-F

NORMAL CROSS-SECTIONAL AREA

Grade

(mm2)

5k~12K 14k~18k 24k~28k

1.0 1.5 2.5

Cable Type(B) H07RN-F H07RN-F H07RN-F

NORMALCROSS

-SECTIONALAREA

Grade

(mm2)NORMALCROSS-SECTIONALAREA 0.75mm2

30k, 32k 36k, 38k

0.75 0.75

Cable Type(B) H07RN-F H07RN-F

NORMAL CROSS-SECTIONAL AREA

Grade

(mm2)


Installation

1. Remove the control cover from the unit by loos-ening the screw.Connect the wires to the terminals on the controlboard individually.

2. Secure the cable onto the control board with thecord clamp.

3. Refix the control cover to the original positionwith the screw.

4. Use a recognized circuit breaker "A" between the power source and the unit. A disconnecting device to adequately disconnectall supply lines must be fitted.

Terminal block

Over 5mm

Cover control

Connecting cable

Connecting cable

CAUTION: After the confirmation of the above conditions, prepare the wiring asfollows:

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 vibrationsto which the unit is subjected during the course of transportation. Check them and make sure that they areall 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 17)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 func-tion of the overload.

9) The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an airgap contact separation of at least 3mm in each active(phase) conductors.

Outdoor Unit

5K~14K 18K 24k~28K 30k,32K 36k,38k

15 20 30 30 40

CircuitBreaker

(A)

Grade

Connecting the Cables to the Outdoor Unit

Service Manual 19

Installation

Checking the Drainage Forming the Piping1. Checking the drainage.

• Pour a glass of water on the evaporator.

• Ensure the water flows through the drain hose ofthe indoor unit without any leakage and goes outthe drain exit.

2. Drain piping• The drain hose should point downward for easy

drain flow.

• Do not make drain piping like the following.

1. Form the piping by wrapping the connectingportion of the indoor unit with insulation materi-al 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 abovethe ground. Secure the drain hose appropriately.

2. In cases where the outdoor unit is installedbelow 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 wallusing saddle or equivalent.

3. In cases where the Outdoor unit is installedabove 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 equiva-lent.

Taping

Drainhose

Pipings

Connectingcable

Trap is required to prevent waterfrom entering into electrical parts.

Seal small openingsaround pipings with agum type sealer.

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

Trap

Trap

Downward slope

Do not raiseAccumulateddrain water

Tip of drain hose dipped in water

Air

WavingWaterleakage

Waterleakage Ditch

Less than 50mm gap

Waterleakage


Installation

CAUTION: To avoid nitrogen entering therefrigerant system in a liquid state, the top of

the cylinder must be higher than its bottom when youpressurize the system. Usually, the cylinder is usedin a vertical standing position.

Air and moisture remaining in the refrigerant systemhave 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 andblock capillary tubing.

• Water may lead to corrosion of parts in the refrig-eration system.

Therefore, the refrigerant system must be leak test-ed and evacuated to remove any noncondensablesand moisture from the system.

1. Preparation• Check that each tube(both liquid and gas side

tubes) between the indoor and outdoor units havebeen properly connected and all wiring for the testrun has been completed. Remove the servicevalve caps from both the gas and the liquid side onthe outdoor unit. Note that both the liquid and thegas side service valves on the outdoor unit arekept closed at this stage.

2. Leak test• Connect the manifold valve(with pressure gauges)

and dry nitrogen gas cylinder to this service portwith charge hoses.

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

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

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

Lo Hi

Indoor unit

Outdoor unit

Manifold valve

Charge hose

Nitrogen gascylinder(in verticalstanding position)

Pressure gauge

CAUTION: Be sure to use a manifold valvefor air purging. If it is not available, use a stop

valve for this purpose. The "Hi" knob of the manifoldvalve must always be kept close.

Air Purging

Air Purging with Vacuum Pump

Service Manual 21

Installation

3. Evacuation• Connect the charge hose end described in the pre-

ceding steps to the vacuum pump to evacuate thetubing and indoor unit.Confirm the "Lo" knob of the manifold valve isopen. Then, run the vacuum pump.The operation time for evacuation varies with tub-ing length and capacity of the pump. The followingtable shows the time required for evacuation.

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

4. Finishing the job• With a service valve wrench, turn the valve stem of

liquid side valve counter-clockwise to fully openthe valve.

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

• Loosen the charge hose connected to the gas sideservice port slightly to release the pressure, thenremove the hose.

• Replace the flare nut and its bonnet on the gasside service port and fasten the flare nut securelywith an adjustable wrench. This process is veryimportant to prevent leakage from the system.

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

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

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

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

terclockwise approximately 90°, wait for about 2~3sec, and close it.

(4) Apply a soap water or a liquid neutral detergent onthe indoor unit connection or outdoor unit connec-tions by a soft brush to check for leakage of theconnecting points of the piping.

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

Soap water method

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

10 min. or more 15 min. or more

If tubing length is less than 10m (33 ft)

if tubing length is longer than 10m(33 ft)

Gas side

Liquid side

Cap

Hexagonal wrench

3-way valve(Close)

3-way valve(Close)

2-way valve(Open)

2-way valve(Open)

Indoor unit

Outdoor unit

Lo Hi

Manifold valve

Vacuum pump

Pressure gauge

Open Close


Installation

1. First, Check the side cover assembly exactly,and fix the power cord in the bottom groove ofcover side left.

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

3. Screw up the front panel, and suspend the hookof the front panel in the groove.

Panel FrontConnector

Front Panel Assembly

Service Manual 23

Test Running

1. Check that all tubing and wiring have been properlyconnected.

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

Prepare remote controller

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

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

3. Reattach the cover bypushing it back into position.

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

• Remove the batteries from the remotecontrol if the system is not going to beused for a long time.

Settlement of outdoor unit• Anchor the outdoor unit with a bolt and

nut(ø10mm) tightly and horizontally on a concreteor rigid mount.

• When installing on the wall, roof or rooftop, anchorthe mounting base securely with a nail or wireassuming the influence of wind and earthquake.

• In the case when the vibration of the unit is con-veyed to the hose, secure the unit with an anti-vibration bushing.

Evaluation of the performance

Operate unit for 15~20 minutes, then check the systemrefrigerant 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 tempera-

ture and the discharge is more than 8°C(46°F)(Cooling) or (Heating).

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

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

The air conditioner is now ready for use.

NOTICE

NOTICE

Bolt

Tubing connection

Discharge temperature

Discharge airIntake temperature

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

R-410A 35°C (95°F) 8.5~9.5kg/cm2G(120~135 P.S.I.G.)

Outside ambientTEMP.Refrigerant The pressure of the gas side

service valve.

This is performed when the unit is to be relocatedor the refrigerant circuit is serviced.Pump Down means collecting all refrigerant in theoutdoor unit without loss in refrigerant gas.

CAUTION:Be sure to perform Pump Down procedure with theunit cooling mode.

Pump Down Procedure1. 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 refrigerantgas.

3. Close the liquid side service valve(all the way in).4. Turn on the unit's operating switch and start the

cooling operation.5. When the low-pressure gauge reading becomes 1

to 0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close thegas side valve stem and then quickly turn off theunit. At that time, Pump Down has been completedand all refrigerant gas will have been collected inthe outdoor unit.

PUMP DOWN


Operation

DISPLAY1) C/O Model (high quality LCD remote controller supplied)Operation Indicator

• On while in appliance operation, off while in appliance pause

Timer Indicator• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled.

Comp. Running Indicator• While in appliance operation, on while in outdoor unit compressor running, off while in compressor off

Plasma Indicator• On while in plasma mode, off while plasma mode is canceled.

Auto restart Indicator• On while auto restart mode, off while auto restart mode is canceled.

Auto restart• In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate

procedures automatically to the previous operating conditions.If your want to use this operation, press the Auto Restart Button.

Power(Forced Operation)• Operation starts, when this button is pressed and stops when you press the button again.

2) H/P Model (high quality LCD remote controller supplied)Operation Indicator

• On while in appliance operation, off while in appliance pause

Timer Indicator• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled

Defrost Indicator• Off except when hot start during heating mode operation or while in defrost control.

Plasma Indicator• On while in plasma mode, off while plasma mode is canceled.

Auto restart Indicator• On while auto restart mode, off while auto restart mode is canceled.

Auto restart• In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate

procedures automatically to the previous operating conditions.If your want to use this operation, press the Auto Restart Button.

Power(Forced Operation)• Operation starts, when this button is pressed and stops when you press the button again.

Cooling Mode Operation• When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan stop.

• When it reaches 0.5°C above the setting temp, they start to operate again.

Compressor ON Temp=> Setting Temp+0.5°C

Compressor OFF Temp => Setting Temp-0.5°C

• While in compressor running, operating with the airflow speed set by the remote controller. While in compressornot running, operating with the low airflow speed regardless of the setting.

Function of Controls

Operation

Service Manual 25

Operation

Display Function

1. Heating Model 2. Cooling Model

• Cooling, Soft Dry, Fan, Heating • Cooling, Soft Dry, Fan

• Sleep Mode • Sleep Mode

• Timer Mode • Timer Mode

• Hot-start, Defrost

• PLASMA Mode • PLASMA Mode

Operation Indicator

Timer Indicator

Sleep Timer Indicator

Defrost Indicator

PLASMA Indicator

Operation Indicator

Timer Indicator

Sleep Timer Indicator

Outdoor Unit Operation

PLASMA Indicator

Self-diagnosis Function

3sec 3sec 3sec

(once)

ErrorCode

1

Error Display LED(Indoor body operation LED)

Error contents

• Indoor room temperaturethermistor open/short

• Indoor pipe temperaturethermistor open/short.

• Indoor Thermistor assembly check

SVC check point


Remote Control Operations

ON OFF

CANCEL

SET

1

3

5

4

9

10

12

14

16

72

813

15

11

6

Cooling Operation

Auto Operation or Auto Changeover

Healthy Dehumidification Operation

Flip-up door(opened)

Heating Operation

Signal transmitter

• Cooling Model( ), Heat Pump Model( )

17

AUTO CLEAN

The controls will look like the following.

Operation Mode

1. START/STOP BUTTONOperation starts when this button is pressed andstops when the button is pressed again.

2. OPERATION MODE SELECTION BUTTONUsed to select the operation mode.

3. ROOM TEMPERATURE SETTING BUTTONSUsed to select the room temperature.

4. INDOOR FAN SPEED SELECTORUsed to select fan speed in four stepslow, medium, high and CHAOS.

5. JET COOL/HEATING(OPTIONAL)Used to start or stop the speed cooling. (Speed cooling/heating operates at super high fan speed in cooling/heating mode.)

6. CHAOS SWING BUTTONUsed to stop or start louver movement and set thedesired up/down airflow direction.

7. ON/OFF TIMER BUTTONSUsed to set the time of starting and stopping opera-tion.

8. TIME SETTING BUTTONSUsed to adjust the time.

9. TIMER SET/CANCEL BUTTONUsed to set the timer when the desired time isobtained and to cancel the Timer operation.

10. SLEEP MODE AUTO BUTTONUsed to set Sleep Mode Auto operation.

11. AIR CIRCULATION BUTTONUsed to circulate the room air without cooling orheating.

12. ROOM TEMPERATURE CHECKING BUTTONUsed to check the room temperature.

13. NANO PLASMA(OPTIONAL)Used to start or stop the plasma-purification function.

14. HORIZONTAL AIRFLOW DIRECTION CONTROLBUTTON (OPTIONAL)Used to set the desired horizontal airflow direction.

15. RESET BUTTONUsed prior to resetting time or after replacing bat-teries.

16. 2nd F ButtonUsed prior to using modes printed in blue at thebottom of buttons.

17. AUTO CLEAN(OPTIONAL)Used to set Auto Clean mode.

Operation

Controls

Service Manual 27

Disassembly

DisassemblyIndoor Unit

WARNING: Disconnect the unit frompower supply before making anychecks. Be sure the power switch is setto "OFF"

1. To remove the Grille from the Chassis. - Pull the grille bottom, the remove 2 securing screws.- Lift the both lower parts of panel front.- After pull down this panel a bit, separate connecting

wire with product.

2. To remove the Control Box.- Before removing the control box, be sure to

disconnect the wires from PWB.- Pull the cover control out from the control box

and disconnect other wires.- Remove securing screws.- Pull the control box out from the chassis carefully.

Step Motor Connectors

Sensor Connector

Comp Connector

4Way/Fan Connector

MotorConnectorPower Connector

Power ConnectorComp Connector

Panel Front Connector


Disassembly

3. To remove the Evaporator.- Remove 4 screws securing the evaporator.- Pull the evaporator out from the chassis carefully.

4. Before removing the Turbo Fan.- Remove the securing screws from the chassis.- Pull the pipe cover, top cover and the air guide.

5. To remove the Motor.- Remove the securing bolt from the motor shaft.- Pull the fan out from the motor shaft.- Remove 4 screws securing motor mount from the

chassis and lift up the motor mount and the bracket.

Top Cover

Pipe Cover

Air Guide

Turbo Fan

Bracket

Bolt Motor Mount

Service Manual 29

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

Ex) 9K: When installed at a distance of 15m, 148g of refrigerant should be added.(15-7.62) x 20g = 148g

INDOOR UNIT

HEATEXCHANGER(EVAPORATOR) HEAT

EXCHANGER(CONDENSER)

COMPRESSORGAS SIDE

CAPILLARY TUBELIQUID SIDE

OUTDOOR UNIT

• Cooling Only Models

MODEL

9K, 12K(Cooling Only)

Pipe size(Diameter:ø) Piping length Elevation

Gas Liquid Rated Max Rated Max

1/2" 1/4" 7.62m(25ft) 15m(50ft) 5m(16ft) 7m(23ft)

a proper quantity of refrigerant

9K, 12K 20g

Troubleshooting Guide

Troubleshooting GuideRefrigeration Cycle Diagram


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

Shaft position Shaft position Service port

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

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

vacumm pump)

Open Open Closed(with valve cap) (with valve cap) (with cap)

Closed Open Open(clockwise) (counter-clockwise) (connected manifold

gauge)

Open Open Open(with charging

cylinder)

Open Open Open(with charging

cylinder)

Open Open

Open Open

Works

Shipping

Air purging(Installation)

Operation

Pumping down(Transfering)

Evacuation(Servicing)

Gas charging(Servicing)

Pressure check(Servicing)

Gas releasing(Servicing)

1.

2.

3.

4.

5.

6.

Valve cap

Open positionClosed position

Pin

Serviceport

Serviceport cap

To outdoor unit

Flare nut

To piping connection

To outdoor unit

Hexagonal wrench (4mm)

Open positionClosed position

To piping connection

Flare nut

Open(with charging cylinder)

Open(with charging cylinder)

2-way, 3-way Valve


Service Manual 31

1. Air purging

Required tools : hexagonal wrench, adjustablewrench, torque wrenches, wrench tohold the joints, and gas leak detec-tor.

The additional gas for air purging has been chargedin the outdoor unit.However, if the flare connections have not be done

correctly and there gas leaks, a gas cylinder and thecharge set will be needed.

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

• Procedure

(1) Recheck the piping connections.

(2) Open the valve stem of the 2-way valve coun-terclockwise approximately 90°, wait 10 sec-onds, 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 serviceport.

– Using the hexagonal wrench to press the valvecore pin, discharge for three seconds and thenwait for one minute. Repeat this three times.

(5) Use torque wrench to tighten the service portnut to a torque of 1.8kg.cm.

(6) Set the 3-way valve to the back seat.

(7) Mount the valve stem nuts to the 2-way and 3-way valves.

(8) Check for gas leakage. – At this time, especially check for gas leakage

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

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

If the gas leaks stop when the piping connectionsare tightened further, continue working from step (4). If the gas leaks do not stop when the connectionsare retightened, repair the location of the leak, dis-charge all of the gas through the service port, andthen recharge with the specified amount of gasfrom a gas cylinder.

Service port nut:

Be sure, using a torque wrench to tighten the service port nut (after using the service port), so that it prevents thegas leakage from the refrigeration cycle.* CAUTION : Do not leak the gas in the air during Air purging.

Liquid side

Outdoor unit

3-wayvalve

Gas side

Indoor unit

2-wayvalve

Open

Clsed



2. Pumping down

• Procedure

(1) Confirm that both the 2-way and 3-way valvesare set to the open position. – Remove the valve stem caps and confirm that

the valve stems are in the raised position. – Be sure to use a hexagonal wrench to operate

the valve stems.

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

(3) Stop operation and wait for 3 minutes, thenconnect the charge set to the service port ofthe 3-way valve.– Connect the charge hose with the push pin to

the service port.

(4) Air purging of the charge hose.– Open the low-pressure valve on the charge set

slightly to air purge from the charge hose.

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

(6) Operate the air conditioner at the coolingcycle and stop it when the gauge indicates1kg/cm2g.

(7) Immediately set the 3-way valve to the closedposition.– Do this quickly so that the gauge ends up indi-

cating 3 to 5kg/cm2g.

(8) Disconnect the charge set, and mount the 2-way and 3-way valve’s stem nuts and the ser-vice 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.

Lo

Closed

Purge the air

Outdoor unit

Indoor unit Liquid side

Gas side

CLOSE

Open2-Wayvalve

3-Wayvalve

CLOSE

Troubleshooting GuideTroubleshooting Guide

Service Manual 33

1) Re-air purging (Re-installation)

• Procedure

(1) Confirm that both the 2-way valve and the 3-way valve are set to the closed position.

(2) Connect the charge set and a gas cylinder tothe service port of the 3-way valve. – Leave the valve on the gas cylinder closed.

(3) Air purging. – Open the valves on the gas cylinder and the

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

– After purging the air, use a torque wrench totighten the flare nut on the 2-way valve.

(4) Check for gas leakage.– Check the flare connections for gas leakage.

(5) Discharge the refrigerant. – Close the valve on the gas cylinder and dis-

charge the refrigerant until the gauge indicates3 to 5 kg/cm2g.

(6) Disconnect the charge set and the gas cylin-der, and set the 2-way and 3-way valves to theopen position.– Be sure to use a hexagonal wrench to operate

the valve stems.

(7) Mount the valve stem nuts and the serviceport 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.

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

Lo

Closed

OPEN

Closed

Gas cylinder

R22

Outdoor unit


Gas side

CLOSE

2-Wayvalve

3-Wayvalve



2) Balance refrigerant of the 2-way, 3-way valves (Gas leakage)

• Procedure

(1) Confirm that both the 2-way and 3-way valvesare set to the back seat.

(2) Connect the charge set to the 3-way valve’sport. – Leave the valve on the charge set closed. – Connect the charge hose with the push pin to

the service port.

(3) Open the valve (Lo side) on the charge setand discharge the refrigerant until the gaugeindicates 0 kg/cm2G.– If there is no air in the refrigerant cycle (the

pressure when the air conditioner is not run-ning is higher than 1 kg/cm2G), discharge therefrigerant until the gauge indicates 0.5 to 1kg/cm2G. if this is the case, it will not be neces-sary to apply a evacuatin.

– Discharge the refrigerant gradually; if it is dis-charged too suddenly, the refrigeration oil willalso be discharged.

Lo

Open

Open3-Wayvalve

2-Wayvalve

Gas side

CLOSEOPEN

Outdoor unit

Liquid sideIndoor unit


Service Manual 35

3. Evacuation (All amount of refrigerant leaked)

• Procedure

(1) Connect the vacuum pump to the charge set’scenter 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 thatthe gauge needle does not move (approxima-tely 5 minutes after turning off the vacuumpump).

(4) Disconnect the charge hose from the vacuumpump. – Vacuum pump oil.

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

Lo

Open

Open

Vacuum pump

2-Wayvalve

Outdoor unit

Liquid sideIndoor unit

Gas side

3-Wayvalve

CLOSEOPEN



4. Gas Charging (After Evacuation)

• Procedure

(1) Connect the charge hose to the chargingcylinder. – Connect the charge hose which you dis-con-

nected from the vacuum pump to the valve atthe bottom of the cylinder.

– If you are using a gas cylinder, also use ascale and revers the cylinder so that the sys-tem 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 topurge the air. (Be careful of the liquid refriger-ant). The procedure is the same if using a gascylinder.

(3) Open the valve (Lo side on the charge set andcharge the system with liquid refrigerant.– If the system can not be charged with the spec-

ified amount of refrigerant, it can be chargedwith a little at a time (approximately 150g eachtime) while operating the air conditioner in thecooling cycle; however, one time is not suffi-cient, wait approximately 1 minute and thenrepeat the procedure (pumping down-pin).

(4) Immediately disconnect the charge hose fromthe 3-way valve’s service port. – Stopping partway will allow the gas to be dis-

charged.– If the system has been charged with liquid

refrigerant while operating the air conditionerturn off the air conditioner before disconnectingthe hose.

(5) Mount the valve stem nuts and the serviceport nut. – Use torque wrench to tighten the service port

nut to a torque of 1.8 kg.m.– Be sure to check for gas leakage.

\

This is different from previous procedures.Because you are charging with liquid refrigerantfrom the gas side, absolutely do not attempt tocharge with larger amounts of liquid refrigerantwhile operating the air conditioner.

Lo

Chargingcylinder

Outdoor unit


Gas side

CLOSE

Open2-Wayvalve

3-Wayvalve

OPEN

Open

Check valve

(1)


Service Manual 37

1. Trouble analysis1. Check temperature difference between intake and discharge air and operating current.

Temp. Difference

Operating Current

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

rated current

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

rated current

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

rated current

Temp. difference :over 8°C(14°F)

All amount of refrigerant leaked out.Check refrigeration cycle.

Refrigerant leakage Clog of refrigeration cycleDefective compressor

Excessive amount of refrigerant

Normal

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

2. Check temperature and pressure of refrigeration cycle.

Notice:1. The suction pressure is usually 4.5~5.0 kg/cm2G at normal condition.2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with

putty.

Suction pressure(Compared with the

normal value)

Temperature(Compared with the

normal value)Cause of Trouble Description

Higher

HighDefective compressorDefective 4-way reversing valve

Excessive amount of refrigerantHigh pressure does not quicklyrise at the beginning of operation.

Current is low.

Normal

Lower HigherInsufficient amount of refrigerant(Leakage) Clogging

Current is low.

Current is low.


Cycle Parts


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

Turn off Main Power

Turn on Main Power

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

Primarily, the operating condition of Micom is OK.Check the voltage of power(About AC 208V/AC230V, 60Hz)

• Main power's voltage• Voltage applied to the unit• Connecting method of Indoor/Outdoor connecting

cable• Check PWB Ass'y(Outdoor unit)

- Fuse- Pattern damage- Varistor(ZNRI)

Check the connection housing for contacting

• Connector related to CN-POWER• Connector related to CN-FAN• Connector contacting of Outdoor Fan/Compressor• Display PWB Ass'y Check• Connector related to CN-DC/DC

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

PCB Board Operation Check

Items

• Power Transformer(Outdoor unit)- Input Voltage- Output Voltage

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

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

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

• Replace Trans

• Replace IC2

• Replace IC3

• Replace faulty parts

- About AC208V/230V±10% - Check the power voltage- About AC17±3V

• DC +12V

• DC +5V

• Voltage of Outdoor unit Micom No. 8, Voltage of Indoor unit Micom No. 43 and solderingcondition

Content Remedy

NO YES

(After 10 seconds)

Electronic Parts


Service Manual 39

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

Turn on Main Power

While the compressor has been stopped, the compressor does notoperate owing to the delaying function for 3 minutes after stopped.

Caused by other parts except the remote controllerCause by the remote controller

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

Check the contact of CN-DISP connector.

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

Check DISP PWB Ass'y- Voltage between CN DISP - : DC +5V

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 the connecting circuit between the remote controllerMICOM (No. ) - R17(2Ω) - IR LED - Q1 - R16(2.2KΩ).

Check point

• Check the connecting circuit between PIN - R75(1K)- C71(1000PF) - MICOM PIN

• Check Receiver Ass'y



4. Compressor/Outdoor Fan are unable to drive.

Turn on Main Power

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

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

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

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

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

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

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

Turn off Main Power

• Check the electrical wiring diagram of outdoor side.• Check the abnormal condition for the component of Compressor/Outdoor

Fan Motor.

Check Relay(RY - COMP) for driving compressor.

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

• Check the circuit related to the relay(Outdoor unit).Check point COMP ON COMP OFF

Between Micom(No.DC5V DC0V

15) and GNDBetween IC8(No. 16) Below DC 1V

About DC12Vand GND IC0M(No.16) (app)


Service Manual 41

5. When Indoor Fan does not operate.

Check connecting condition of the CN-MOTOR CON-NECTOR

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

Do the voltage of terminal ofCN-DC/DC CONNECTOR inOutdoor unit corresponds to thevalues in the table of page 51?

Check the patterns and theconditions of outdoor unitPWB Assy's.

Check the connecting condi-tion and disconnection ofconnecting wires betweenIndoor and Outdoor unit.

Check the pattern and thecondition of Indoor unit PWBAss'y.

Check the interference of Indoor Fan.

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

Check the motor of Indoor Fan

Indoor Fan may be stopped in the Soft Dry Mode(change to the Cooling Operation Mode).

Indoor Fan is to be stopped when Indoor pipe(coil) termperature is lower than 79°F.

(At that times, Defrost indicator is turned on)

NO YES



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

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

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

Check the operating circuit of the Vertical Louver

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

• Confirm that there is a soldering short at following terminals.- Between 62 , 61 , 60 and 59 of MICOM- Between 57 , 56 , 55 and 54 of MICOM- Between 51 , 50 , 49 and 48 of MICOM- Between 1 , 2 , 3 , 4 and 5 of CN-U/D, CN-L/R

If there are no problems after above checks

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

6. When Vertical Louver does not operate.


Service Manual 43

• The operation indicator of Indoor unit blinks five times.• The red indicator of Outdoor unit blinks five times.

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

Check the installation condition of outdoor unit.

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

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

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

Check the PWB assembly of Indoor and Outdoor unit.

Caution: If the connecting wires of Indoor and Outdoor unit are not connected within 2 minutes after the powerof Outdoor unit is applied, a communication error will occur. Therefore, the power should be appliedafter connecting them.

7. When a comunication error occurs.



8. The phenomena in case of connecting error

INDOOR UNIT

Connector Type Condition

Open and connecting error

Open

Open

Open

Open

Short between terminals( and ) of ROOM-TH.

Short between terminals( and ) of PIPE-TH.

Short between terminals

• The same as the phenomenon of Outdoor Unit.

• The up/down vane does not operate.

• The up/down vane does not smoothly operate.

• It does not operate with a remote controller.

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

• The compressor operates continuously regardlessof the setting temperature and the variation of roomtemperature.

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

• Continuous operation

• The operation indicator blinks once.

• The compressor and the outdoor fan stop.• The indoor fan speed is low.

• The indoor fan does not operate.• The operation indicator of Indoor unit blinks 8 times.

CN-DC/DC

CN-MOTOR

CN-UD

CN-D1/D2

CN-TH

BlueBlackBrownRed

Phenomena

On for 0.5 second

Off for 3 seconds


Service Manual 45

OUTDOOR UNIT

Connector Type Condition

OPEN

• PWB pattern is damaged when applying the power.Connecting reversely

Connecting reversely

OPEN

OPEN

OPEN

OPEN

Connecting error( )

Connecting error( )

Connecting error( )

Connecting error( )

Connecting error( )

Connecting error( )

• All functions stop.• The operation with the remote controller, forced and

test one do not operate.

• All functions stop.• The operation with the remote controller, forced and

test one do not operate.

• The Indoor Fan does not operate.

• The signal of remote controller is inputted, but the product does not operate.

• The RED indicator of outdoor unit and the operation indicator of indoor one blinks 5 times after 2 minuteswith applying the power.

• No power for Indoor unit.• The signal input of the remote controller and opera-

tion of product is impossible.• The thermal protector of the Power Trans operates

when let it alone for long time.

• The signal of the remote controller is inputted.• The fuse and Q61 in the Outdoor unit are damaged

when the indoor fan is operated.

• No power for Indoor unit.• The signal input of the remote controller and opera-

tion of product is impossible.• The RED indicator of the Outdoor unit blinks 5 times

after 2 minutes with applying the power.

• All functions stop.• The operation with the remote controller, forced and test

one do not operate.

• The only signal of remote controller operation/stop isinputted, but the product does not operate.

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

• The beep sound, such as "beep, beep, beep, beep,beep", occurs periodically in Indoor unit.

• The signal input of a remote controller and operation ofproduct is impossible.

• The RED indicator blinks 5 times after 2 minutes withapplying the power.

• All functions stop or the compressor does not operate.• The operation with the remote controller, forced and test

one do not operate.

• All functions stop.• The operation with the remote controller, forced and test

one do not operate.

CN-POWER

RY-COMPterminal

CN-TRANS

CN-FAN

The connectingwire of CN-DC/DC, andIndoor and

Outdoor Unit

BlueBlackBrownRed

Phenomena



9. Voltage of Connectors according to Indoor Fan Speed

43211

1

4 3

12

34

23

45

62

IND

OO

RFA

NM

OTO

R

IND

OO

R P

WB

ASSY

Con

nect

ing

wire

sbe

twee

n In

door

and

Out

door

Indo

orC

onne

ctin

g Te

rmin

alO

utdo

orC

onne

ctin

g Te

rmin

al

Inpu

t Pow

er

POW

ERTR

ANS

CN

-PO

WER

CN

-TR

ANS

CN

-DC

/DC

RY-

CO

MP

BK

BLBK

BRR

D

BKBL

BL BK BR RD

+-

S-H

iH

iM

edLo

wO

ffS

-Hi

Hi

Med

Low

Off

S-H

iH

iM

edLo

wO

ffS

-Hi

Hi

Med

Low

Off

12

28.6

25.6

22.2

20.0

0.0

35.7

30.7

25.1

21.2

0.0

32.0

27.8

24.1

21.2

0.0

35.7

33.3

29.4

24.2

0.0

32

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

42

0~5

0~5

0~5

0~5

5.0

0~5

0~5

0~5

0~5

5.0

0~5

0~5

0~5

0~5

5.0

0~5

0~5

0~5

0~5

5.0

12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

32

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

42

28.6

25.6

22.2

20.0

0.0

35.7

30.7

25.1

21.2

0.0

32.0

27.8

24.1

21.2

0.0

35.7

33.3

29.4

24.2

0.0

12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

0~12

32

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

17.0

42

29.0

25.9

22.4

20.2

0.0

36.0

30.9

25.3

21.3

0.0

32.3

28.1

24.4

21.3

0.0

36.0

33.7

29.6

24.4

0.0

24K

OU

TDO

OR

CN

-D

C/D

C

IND

OO

RC

N-

DC

/DC

IND

OO

RC

N-

MO

TOR

No.

of p

ins

MO

DELS

CONN

ELTO

RS

9K12

K18

K

DC

Vol

tage

(±10

%)

DC

Vol

tage

(±10

%)

DC

Vol

tage

(±10

%)

DC

Vol

tage

(±10

%)


Service Manual 47

OU

TD

OO

R

6417

Digit2 10

LED

2

LED

4

LED

3

LED

1

DE

FR

OS

T

ON

/OF

F

TIM

ER

SLE

EP

6(d)

Digit1 c5

d

e

8(c)

7(e)

b

g

f

a

9(b)

1(g)

3(a)

4(f)

41216

15 14 13 81011 9 67 5 23 1

45

2722

2019

1821

2524

2326

37

3230

2928

31.

33 34 3536

4139

38

40 4342

44

5459

6162

6360

5657

5855

4952

5153

50

4746

48

HV

B A

SS

Y2 31

2 31

CN

-HV

B(B

L)

21 1

2

Vdd0

VssO

R28H

20K

R27H

20K

DIS

PLA

Y

44

ST

EP

PIN

G M

OT

OR

ST

EP

PIN

G M

OT

ORK

EY

TE

ST

Vcc

RE

CE

IVE

R

Vout

GN

D

DC

5V

25V0.01C

04LC

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AIN 14

881013

9

10

9

7 6 5

7 6 5

14 8810

10

99

13

667

7

55 CN

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114 3 2

4 3 2

11CN

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3

22

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55

RDYLBL PK OR

443

322

BL PK YL

332

211

OR RD

55

receiver10 49 6 5 3 2 1

CN

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CN

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89 7 56 4 3

C02L

10V220 5V

R12H

10K50V

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LED

scan

1516

14

21 3

digit 1

digit 2

ec d

CN

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CN

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H)

2 1

5V

R02G

220

R03G

220

R04G

220

R01G

220

IC01M

KID

65004AF

12 11

13 10

5 64 7

9

8

agb f

KID

65004AF

IC02M

12V

680pF

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R01L

C01L

5.1K

F2

OJ02H

5V

OR

2HO

R3H

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6HO

R5H

OR

4HM

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Hi

Low

AVss

AVdd1

AV

ret

AV

dd

RE

SE

T

X1

X2

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O

Vss1

INT

1

R23H

OR

1HF

1

R25H

R24H

R26H

R21H

~R

26H12.1K

1%

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R21H

5V

5V

CS

T-8.00M

TW

OS

C01B

uPD

780023AG

C

0IMC

RN

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CN

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(BL)

12

34

5

R01E1K

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RO

OM

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EP

MO

TO

R

6.2K12.1K

R05H

10K

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211

R02H

R04H

5V

5V

receiver

CN

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1(WH

)

3 4

3 4

CN

-LR2(W

H)

L / R 2

ST

EP

MO

TO

R

RD

12V

RD YLOR PK

1

BL

CN

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H)

BL

34 45

OR PKYL

L / R 1

ST

EP

PIN

G M

OT

OR

RD

PK

BL

YL

OR

SU

B P

CB

AS

M

5V

HV

B

7812

1111

11125V

10

9 8 7 6 5 4 3 2 1

8910 12345677 6 5 4 3 210

9 8 1

9 8 7 6 5 4 3 2 1

9 8 7 6 5 4 3 2 1123456789

HV

B P

IN1

1011121313

12 11

10

5 4 2 13

5 4 2 133 1245

51

24

3

14 13 12

14 13 12

11

E3 1K

E2 1K

C02M

103

C01M

103C

03M103

CN

-D1(W

H)

CN

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N(W

H)

CN

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10111213

101113

12

33

22

112

2

33

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C01A

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C7536

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R01B1M

HV

B P

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HV

B P

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HV

B

HV

B P

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5V

DC

5V

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DC

12V+

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7805

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+

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7812

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+

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10K

R96

10K

DC

5V

324

IC9-1

KA

393

DC

12V

81

R95

10K

63V100uFC

07D

CN

-MO

TO

R1(W

H)

MO

TO

R1

IND

OO

RF

AN

34

34

11

22

+

104,50V

CN

-DC

/DC

(BL)

PO

LY S

W1

RX

E250

~3 24

3 24

1/4W

C92

11

DC

5V

R90 1K

C91

103

5

IC9-2

KA

393

-

R92 10K

4.7KR

917+

6

R93 10K

2 31 4

DC

12V

2 31

R99

750

4

C03L

L3

10V220

RX

D

TX

D

TX

D

RX

D

FG

C81

103

R81 1K

FG

1

FG

1 EE

PR

OM

21516

1 710

13 11

1214

4 653

9

8

13 143

15 16

2 1

KID

65004AF

IC03M

10 116

125 4

98 7

12V

42

3FA

NIN

DO

OR

MO

TO

R2

1

42

31 R

XE

250

~ PO

LY S

W2

FG

2

DC

12V

CN

-MO

TO

R2(W

H)

R81A

1KF

G2

C81A

103

Schematic Diagram

Schematic DiagramElectric Control Device

Schematic Diagram

Electric Control Device

Indoor Unit


Outdoor Unit

3

21

IC9

IC10

5

TLP

521-

1BL

TLP

521-

1BL

CN

-DC

/DC 42 31

470u

F20

V

C05

42 31

82 3

220

VR

71R

75

23.2

K

1%2K

100u

F25

V

C73

+

4 R74

5.1K

87

29.4

K

20K

34K

1.06

K

102

1

-+

-

D92

C92

50V

1N41

48

8

104

IC7

5.23

K13

K3K

3 +14

9

HC

P60

68

56R95

D91

1N41

48

34

21

21

34

2.7K

R92

DC

5V

DC

5V

DC

5V

ZD

815.

1V

R91

1K

6.8K

1%R82

R81

X

XX

1%

NT

C1

DK

S-8

0-13

ZN

R1

INR

14D

471K

35V

2200

uF

+

103

C06

470u

F25

V

C03

+

104

C02

50V

103

C04

C01

+

C66

63V

2SD

2220

680u

F

IC3

7805

100K

R68

5V

OI

10K

R64

Q62

C67

100V

473K

+

R67 I1.5K

7812

IC2

O

12V

103K

100V

C60

49

17V

102J

,100

VC

69C

68

821K

,1K

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65

2 37

ST

2

84

4

PO

WE

R T

RA

NS

91

35

64

7

56

34

1

3

CN

-TR

AN

S

1

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01

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D

61 E

RB

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71

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6112

V

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200

101K

1KV

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68K

3WR63

R62

1/2W

560K

100u

F

+C

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AC

230V

/60H

zF

US

E25

0V/3

.15A

150-

F06

MC

OIL

1

CN

-PO

WE

R

11

G4A

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RY

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MP

WX

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1

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RY

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TE

R

RY

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CN

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CN

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11

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YU

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)

TM

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SR

DY

IN/S

RD

YO

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/RC

3

AN

0/A

ref/R

B0

PW

M0/

CO

MP

0/R

B4

PW

M1/

CO

MP

1/R

B5

R97

1K

RY

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AT

ER

RY

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MP

RY

-FA

N

R96

620

RY

-4W

AY

10

6

100V

102J

C72

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13K

1%

16.04

K

22

51.1

K

2-

45

-+

L61

L62

FM

X12

SL6

3L6

4

D62

11

ST

1

2

100U

fR

7211

K1%

C71

+

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10.2

K1%

LED

92

7

21.5

K

39.2

K

35.7

K

+11

4.3K

13

103

C91

R94

180

R93

390

1KR90

LED

91

DC

12V

KR

A10

2M

DC

5V

R71

Q71

139

9

8

15 16

2 1

12 13 1411

4 356

MIC

OM

14

IC01

MK

ID65

004A

PK

ID65

004A

P

11 1210

EC

1/R

B6

8 96 7

INT

O/R

B2

INT

1/R

B3

BU

Z/R

B2

12.1

KR

27 1%

OR

7O

R8

1%X

XX

XX

X1%

R28

12.1

K 1%

OR

5O

R4

OR

6X

XX

1%X

XX

1%1%

XX

X

12.1

KR

25R

2412

.1K 1%

12.1

K1%

1%

R26

DC

5V

TH

11KR

32H

R31

H12

.1K

2 4 53

AN

7/R

A7

Vdd

AN

6/R

A6

AN

5/R

A5

1A

N4/

RA

4

DC

5V

+R02

A10

K

16

BD

61U

4SB

A60

RC

4/S

CK

RC

5/S

IN

1521 1719 182023 22

Xou

t

RC

6/S

OU

T

RD

2

Xin

RD

0/IN

T2

RE

SE

T

Vss

R01

B 1

M

R01

A

C01

A10

3

1K

50V

CS

T-4

.00M

TW

OS

C01

B7036

P

R03

A10

0 C02

A10

uF

IC4DC

5V

25 242628 27

RD

1/IN

T3

RA

0/E

C0

RA

1/A

N1

RA

2/A

N2

RA

3/A

N3

10K

C11

H10

3R11

H10

K

KE

YT

ES

T

R12

H

DC

5V

Schematic Diagram

Service Manual 49

BLBL

BK

BKFUSE3.15A

FUSE2.5A

ZNR

CN-DC/DC

RY-COMP

3 4

MAIN P.C.BYL

MOTOR

RD

BL

BR

BL

RD

BR

BL

TERMINALBLOCK

TO INDOOR UNIT

POWERINPUT

3854A30077ZOUTDOOR WIRING DIAGRAM

RD BR BK BL

G

H

F

C

CA

PA

CIT

OR

CN

-TR

AN

S

TR

AN

SF

OR

ME

RT/B 1

CN-POWER

BRBR YL

O.L.PCOMP.SR C

(N) (L)

Indoor Unit

Outdoor Unit (9K, 12K)

9K, 12K (Cooling Only Models, Cooling & Heating Models)

Schematic Diagram

Wiring Diagram


MAIN PWB ASSY(Indoor Unit)

• PWB ASSY SVC PART LIST

1 12K Cooling Model 6871A20387G OPEN 15K OPEN OPEN OPEN OPEN

2 9K Cooling Model 6871A20387G OPEN 15K OPEN OPEN OPEN OPEN

NO MODEL P/No.OPTIONAL FUNCTION

OR1H OR2H OR3H OR4H OR5H OR6H

OJ1H : Short

OJ2H, OJ3H, OJ4H : OPEN

• TOP VIEW

• BOTTOM VIEW

Electric Control DeviceComponents Location

Schematic Diagram

Service Manual 51

1 12K Cooling Model 6871A10036S 27K 10K 39K 56K 39K X X X X X X

2 9K Cooling Model 6871A10036R 5.1K 12K 56K 56K OPEN X X X X X X

MAIN PWB ASSY(Outdoor Unit)

• PWB ASSY SVC PART LIST

NO MODEL P/No.OPTIONAL FUNCTION

OR4H OR5H OR6H OR7H OR 8H FUSE RY-HEATER

RY-4WAY RY-FAN CN-

4WAYCN-FAN CN-TH

125V3.15A

Schematic Diagram


DISPLAY PWB ASSEMBLY

SUB P.W.B ASSEMBLY

CN-CON(WH)

CN-CON(WH)

CN-D7

CN-D8

1CN-D6

1

1

CN-D5CN-D5

CN-D6

1

1

1

1

CN-D8

1

1

1

1

CN-D7

11

CN-D4

1

CN-D3

CN-D1

1CN-D3

CN-D1

1

CN-D2

CN-D2

11

CN-D4

1

CN-12V(WH)

CN-SW(BL)

CN-12V(WH)

CN-SW(BL)

11

1 1

C01

V

PWB ASM:6871A20363

PWB:6870A90126A

PWB ASM:6871A20363

PWB:6870A90126A

C02

V

C01V

C02V

Schematic Diagram

– 6871A20462TOP VIEW

BOTTOM VIEW

Service Manual 53

NOTE: Please refer to Label Quality on the product since this specification may be changed for improving performance

Items Unit LA090CP LA120CPPower Supply ø, V, Hz 1, 115V, 60 1, 115, 60Cooling Capacity BTU/h 9,000 12,000Input W 940 1,290Running Current A 8.5 11.7COMP. Locked Rotor AMP. A 46E.E.R BTU/hW 9.6 9.3Air Circulation m3/min(cfm) 7.1(250) 8.8(330)Moisture Removal l/h(pts/hr) 1.2(2.6) 1.4(3)Noise Level Indoor, High dB(A)±3 39 43(Sound Med dB(A)±3 34 37Pressure, 1m) Low dB(A)±3 30 34

Outdoor, Max dB(A)±3 46 46Features Temperature Control Thermistor Thermistor

Air Deflection 4-way 4-waySteps, Fan/Cool 3/4 3/4Airflow Direction Control(up&down) Auto AutoAirflow Direction Control(left&right) Manual ManualRemocon Type Wireless LCD Wireless LCDSetting Temperature Range, Cooling Mode 64~86°F 64~86°FTemperature Increment 2°F 2°FAuto Operation(electronic control) Yes YesSelf Diagnosis Yes YesTimer 24hr, On/Off 24hr, On/OffSleep Operation Yes YesHealthy Dehumidification Mode Yes YesRestart Delay minutes 3 3

Refrigerant(R-22) Charge g(oz) 740(26.1) 630(22.2)Power cord AWG #: P*mm2 14:3*2.5 14:3*2.5Fuse or breaker Capacity A 15A 20AConnecting Cable AWG #: P*mm2 16:4*0.75 18:4*0.75Connecting Tube Liquid Side mm(in) 6.35(1/4) 6.35(1/4)(ø. Socket Flare) Gas Side mm(in) 12.7(1/2) 12.7(1/2)

Length, std m(ft) 7.62(25) 7.62(25)Additional Drain Hose(Outer Dia.) mm(in) 19(6/8) 19(6/8)Dimensions Indoor mm 570*568*137 570*568*137(WxHxD) in 22.4*22.3*5.4 22.4*22.3*5.4

Outdoor mm 770*540*245 770*540*245in 30.3*21.3*9.6 30.3*21.3*9.6

Net Weight Indoor kg(lbs) 8.5(18.7) 8.5(18.7)Outdoor kg(lbs) 33(72.8) 33(72.8)

Product Specifications

Product Specifications


Exploded View

Exploded View

3590

12

1355

15

2671

10

3496

00

1355

00-2

1468

11-1

1475

81

3308

70

1468

11-1

3468

10

1355

00-1

1468

11-1

1314

1035

2380

3521

50

3521

1B 2632

30

1475

81

1523

02

1353

13

2687

12

2687

17

1353

16

3542

10

1468

11-2

1475

81

3521

16

3521

15

2499

51

2687

14

1598

30

Indoor Unit

Service Manual 55

Exploded View

Outdoor unit

5501

40

5541

60

5675

02

5521

1143

7210

5590

10

5468

10

5540

31

2617

04 W0C

ZZ

4304

10

5522

03-2

5522

03-1

4372

12

6499

50

6687

11


Replacement Parts List

Replacement Parts ListIndoor Unit

131410 CHASSIS ASSEMBLY 3141A20030C 3141A20030C R135313 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A20277V 3531A20277V R135316 GRILLE ASSEMBLY,INLET 3531A20278A 3531A20278A R

135500-1 COVER 3550A20123C 3550A20123C R135500-2 COVER 3550A20124B 3550A20124B R135500-3 COVER 3550A20060A 3550A20060A -135515 COVER ASSEMBLY,TOP(INDOOR) 3551A20031F 3551A20031F R146811 MOTOR ASSEMBLY,STEP 4681A20055A 4681A20055A R147581 LOUVER,HORIZONTAL 4758A20014B 4758A20014B R152302 FILTER(MECH),A/C 5230A20032A 5230A20032A R159830 AIR CLEANER ASSEMBLY 5983A20007T 5983A20007T R249951 CONTROL BOX ASSEMBLY,INDOOR 4995A20291R 4995A20291R R263230 THERMISTOR ASSEMBLY 6323A20004N 6323A20004N R267110 REMOTE CONTROLLER ASSEMBLY 6711A20083R 6711A20083R R268712 PWB(PCB) ASSEMBLY,DISPLAY 6871A20462B 6871A20462B R268714 PWB(PCB) ASSEMBLY,MAIN 6871A20387G 6871A20387G R330870 DRAIN PAN ASSEMBLY 3087A30004A 3087A30004A R346810 MOTOR ASSEMBLY,INDOOR 4681A20047E 4681A20047E R349600 MOUNT,MOTOR 4960A20016A 4960A20016A R35211B TUBE ASSEMBLY,TUBING 5211AR7066D 5211AR7066D R352150 HOSE ASSEMBLY,DRAIN 5251AR1222R 5251AR1222R R352380 AIR GUIDE 5238A20034A 5238A20034A R354210 EVAPORATOR ASSEMBLY,FIRST 5421A20072A 5421A20072A R359012 FAN,TURBO 5900A00003A 5900A00003A R268714 PWB(PCB) ASSEMBLY,SUB 6871A20363F 6871A20363F R

DESCRIPTIONLOCATION

No.REMARKS

PART No.

LA090CP LA120CP

NOTE) *Please ensure GCSC since these parts may be changed depending upon the buyer's request.(GCSC WEBSITE http://[email protected])

Service Manual 57

Outdoor Unit

NOTE) *Please ensure GCSC since these parts may be changed depending upon the buyer's request.(GCSC WEBSITE http://biz.LGservice.com)

Replacement Parts List

261704 TRANSFORMER,POWER 6171AQ3198G 6171AQ3198G R

430410 BASE ASSEMBLY,OUTDOOR 3041A20008J 3041A20008J R

435301 GRILLE,DISCHARGE 3530A20006G 3530A20006G R

435511 COVER ASSY,CONTROL(OUTDOOR) 3551AR7184R 3551AR7184R R

437210 PANEL ASSEMBLY,FRONT(OUTDOOR) 3721A20027T 3721A20027T R

437212 PANEL ASSEMBLY,REAR(OUTDOOR) 3721A20026K 3721A20026K R

447910 BARRIER ASSEMBLY,OUTDOOR 4791A30002F 4791A30002F R

546810 MOTOR ASSEMBLY,OUTDOOR 4681A20004R 4681A20004R R

550140 ISOLATOR,COMP 4H00982E 4H00982E R

552111 TUBE ASSEMBLY,CAPILLARY 5211A20133X 5211A20095J R

552203-1 VALVE,SERVICE 5220A20005B 5220A20005B R

552203-2 VALVE,SERVICE 2H01890L 5220A20003B R

554031 CONDENSER ASSEMBLY,BENT 5403A20026D 5403A20019B R

554160 COMPRESSOR SET 2520UKAC2HA 2520UKWC2HA R

559010 FAN ASSEMBLY,PROPELLER 5901A10055A 5901A10055A R

567502 O.L.P 6750U-L031A 6750U-L029A R

649950 CONTROL BOX ASSEMBLY,OUTDOOR 4995A10038H 4995A10038J R

668711 PWB(PCB) ASSEMBLY,MAIN(OUTDOOR) 6871A10036R 6871A10036S R

W0CZZ CAPACITOR,DRAWING 6120AR2194F 0CZZA20001N R

DESCRIPTIONLOCATION

No.REMARKS

PART No.

LA090CP LA120CP

P/No.: 3828A20135Z Printed in Korea

Room Air Conditioner - Appliance Factory Parts

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Transcript of Room Air Conditioner - Appliance Factory Parts