LG LS-J0761CL Manuale utente

SERVICE MANUAL

Room Air Conditioner

MODEL : LS-J0761CL / CM / CN / CD / CS

LS-J0761HL / HM / HN / HD / HS

LS-J0962CL / CM / CN / CD / CS

LS-J0962HL / HM / HN / HD / HS

LS-J0963CL / CM / CN / CD / CS

LS-J0821CL / CM / CN / CD / CS

Contents

Functions.................................................................................................................................3

Product Specifications (Cooling Only)..................................................................................5

Product Specification (Cooling & Heating)...........................................................................6

Dimensions..............................................................................................................................7

Refrigeration Cycle Diagram................................................................................................10

Wiring Diagram......................................................................................................................11

Operation Details ..................................................................................................................13

Display Function ...................................................................................................................20

Self-diagnosis Function........................................................................................................20

Installation .............................................................................................................................21

Operation ...............................................................................................................................37

Disassembly of the parts (Indoor Unit)...............................................................................39

2-way, 3-way Valve.................................................................................................................42

Cycle Troubleshooting Guide...............................................................................................49

Electronic Parts Troubleshooting Guide.............................................................................50

Electronic Control Device.....................................................................................................57

Schematic Diagram...............................................................................................................59

Exploded View & Replacement Parts List...........................................................................61

-2-

Functions

• Room temperature sensor. (THERMISTOR)

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

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

• Restarting is inhibited for approx. 3 minutes.

• High, Med, Low, CHAOS

--- Lights up in operation

--- Lights up in Sleep Mode

--- Lights up in Timer Mode

--- Lights up in Defrost Mode (for Heating Model)

OUTDOOR --- Lights up in compressor operation (for Cooling Model)

• Intermittent operation of fan at low speed.

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

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

• The fan is switched to intermittent or irregular operation

•

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

• The louver can be set at the desired position or swing

up and down automatically.

Indoor Unit

Operation ON/OFF by Remote controller

Sensing the Room Temperature

Room temperature control

Starting Current Control

Time Delay Safety Control

Indoor Fan Speed Control

Operation indication Lamps (LED)

Soft Dry Operation Mode

ƒU Both the indoor and outdoor fan

stops during defrosting.

ƒU The indoor fan stops until the

evaporator pipe temperature will be

reached at 28°C.

Sleep Mode Auto Control

Natural Air Control by CHAOS Logic

Airflow Direction Control

-3-

Defrost(Deice) control (Heating)

Hot-start Control (Heating)

-4-

Soft Dry Operation Mode.( )

Remote Controller

Operation ON/OFF

Reset

Operation Mode Selection

Temperature Setting

Timer Selection

Timer Setting

JET COOL

Timer Cancel

Sleep Operation

Airflow Direction Control

(Cooling

model only) (Heating

model only)

TEMPERATURE LOWHIGH

Cooling Operation Mode.( ) Heating Operation Mode.( )

Auto Operation Mode.( )

Fan Operation Mode

Room, Temperature Display

Setting the Time or Timer

ON OFF

SET

CANCEL

Fan Speed Selection

(Low) (Med) (High) (CHAOS)

: (High: 39°C LOW : 11°C)

Down to 18°C

Up to 30°C

Cooling

: OFF, ON, OFF ON

: Cancel Sleep Mode, Timer ON or Timer OFF

: 1, 2, 3, 4, 5, 6, 7, Off Timer

: Fan Operates without cooling or heating.

Down to 16°C

Up to 30°C

Heating

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

Self-diagnosis Function

■Thermistor Error Indicator

• When the indoor pipe sensor or the room temperature sensor is open or is shorted, the error is indicated.

• To indicate the error, the operation LED (or the cooling LED) flashed at 3 sec interval.

• When the error is cleared, the LED stops flashing, the operation (or cooling) LED is on.

• While in appliance pause, the error is not indicated.

Operation Indicator

Timer Indicator

Sleep Timer Indicator

Defrost Indicator

-20-

Operation Indicator

Timer Indicator

Sleep Timer Indicator

Compressor on Indicator OUT

DOOR

Installation

1. Installation of indoor, Outdoor unit

-21-

More than 2.3 m

More than 5 cm

More than

5 cm More than

5 cm

More than 10 cm More than 10 cm

More than 70 cm

1) Selection of the best location

1. Indoor unit

2. Outdoor unit

• There should not be any heat source or steam

near the unit.

• There should not be any obstacles to prevent the

air circulation.

• A place where air circulation in the room will be

good.

• A place where drainage can be easily obtained.

• A place where noise prevention is taken into con-

sideration.

• Do not install the unit near the door way.

• Ensure the spaces indicated by arrows from the

wall, ceiling, fence or other obstacles.

• If an awning is built over the unit to prevent

direct sunlight or rain exposure, be careful

that heat radiation from the condenser is not

restricted.

• There should not be any animals or plants

which could be affected by hot air dis-

charged.

• Ensure the correct distance is left from the

wall, ceiling, fence, or other obstacles as indi-

cated in the diagram.

Install the indoor unit on the wall where the height

from the floor is more than 2.3 meters.

CAUTION

-22-

5-7mm

Indoor Outdoor

WALL

Right rear piping

Installation plate

Marking-off line

Thread

Weight

Type "A" screw

Left rear piping

ø70mm

80mm

50mm

40mm

ø70mm

80mm

50mm

40mm

2) Indoor Unit Installation

The mounting wall should be strong and solid enough

to protect it from the vibration.

1.Mount the installation plate on the wall with four

Type "A" screws.

(if mounting the unit on the concrete wall, consider

using anchor bolts.)

• Always mount the Installation plate horizontally by

aligning the marking-off line by means of the

thread and a level.

2. Drill the piping hole with 70mm dia. holecore

drill.

• Line according to the arrows marked on lower the

left and the right side of the Installation Plate.

The meeting point of the extended line is the cen-

ter of the hole.

• Drill the Piping hole at either the right or the left

and the hole should be slightly slanted to the out-

door side.

The lower left and right side of Installation

Plate

-23-

2. Piping and Drainage of Indoor Unit

1) Preparation of Piping

1. Cut the pipes and the cable.

• Use the accessory piping kit or the pipes pur-

chased locally.

• Measure the distance between the indoor and the

outdoor unit.

• Cut the pipes a little longer than measured dis-

tance.

• Cut the cable 1.5m longer than the length of the

pipe.

2. Remove burrs.

• Remove burrs from cut edges of pipes.

• Turn the pipe end toward down to avoid the metal

powder entering the pipe.

Caution:

If burrs are not removed, they may cause a gas leak-

age.

3. Flaring the pipes.

• Insert the flare nuts, mounted on the connection

ports of both indoor and outdoor unit, onto the

copper pipes. (When the flare nuts are removed

from the indoor unit.) Some gas may leak, as

some gas is charged to prevent the inside of the

pipe from rusting.

• Fit the copper pipe end into the Bar of flare tool

about 0~1.0mm higher.

(See illustration)

• Flare the pipe ends.

4. Tape the flaring portion to protect it from the

dust or damages.

90 Slanted Rough

Pipe cutter

Pipe

Reamer

Point down

"A"

Bar

Clamp handle Red arrow mark

Cone

Yoke

Handle

Copper pipe

Inclined Cracked Uneven

thickness

Surface

damaged

= Improper flaring =

When properly flared, the internal surface of the flare will

evenly shine and be of even thickness.

After the flare part comes into contact with the connec-

tors, carefully check the flare finish.

"A"; ø15.88 mm (5/8") ¡0~1.0 mm

ø12.7 mm (1/2") ¡0~0.5 mm

ø9.52 mm (3/8") ¡0~0.5 mm

ø6.35 mm (1/4") ¡0~0.5 mm

-24-

Installation plate

Pull







Drain hose

Indoor Outdoor

Connecting cable

Connecting

piping

Drain pipe

Indoor unit tubing Flare nut

Spanner Torque wrench

Plastic bands

Drain hose

Adhesive

Drain pipe

Insulation material

Pipings

Connection of Pipings

1. Remove the installation plate

• Pull the two '∆' marked portion of bottom of the

chassis and pull the installation plate out of chas-

sis.

2. Route the drain hose and the indoor tubing.

For right rear piping

3. Insert the piping, the connecting cables and the

drain pipe through the piping hole on the wall.

4. Connect the piping and the indoor tubing, and

drain hose and drain pipe.

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

• Wrap the insulation material around the connect-

ing portion.

• Glue up the connection portion of drain hose and

drain pipe.

Pipe Size Torque

Liquid Side (1/4") 1.8kg.m

Gas Side (3/8") 4.2kg.m

Gas Side (1/2") 5.5kg.m

-25-

Taping

Conecting

cable Gas side

piping

Drain hose Liquid side

piping

Connecting

cable

Drain hose

Press the lower left and right side of the unit against

the Installation Plate until the hooks engage with their

slots (sound click).

5. Bend the tubing as shown in the figure and bind

the piping, the connecting cables and the drain

hose altogether.

• Make a small loop for easy connection later.

6. Wrap the tubing, the drain hose and the con-

necting cable with tape.

7. Indoor unit installation

• Hook the indoor unit onto the upper portion of the

installation plate. (Engage the two hooks of the

rear top of the indoor unit with the upper edge of

the installation plate.)

Ensure the hooks are properly seated on the

installation plate by moving it in left and right.

CAUTION

Take care to arrange the piping, drain hose and

cables as the feature 7 page for inserting it into the

indoor unit and mount the indoor unit on the instal-

lation plate.

CAUTION

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.

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