Goldstar Hblg2400r, Hblg2350e, Hblg1800r, Wg2400r, Wg1800r Service Manual

Room Air Conditioner

SVC MANUAL(Exploded View)

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

Internal Use Only

http://biz.lgservice.com

MODEL :

LWM1836TAS, LWM1836QCG, LWN2131QAG, Y5USC24-6R, WG2400R, LWN2432QAS, LWN2433TCS, WG1800R, M1804R, Y5USC18-6R, LWM1836QAS, HBLG1800R, HBLG2400R, M2403R, LWC243NSMM0, LWC243NSMM2, HBLG2350E

CONTENTS

1. PREFACE

1.1 SAFETY PRECAUTIONS................................................................................................................................3

1.2 INSULATION RESISTANCE TEST.................................................................................................................3

1.3 SPECIFICATIONS...........................................................................................................................................3

1.4 FEATURES .....................................................................................................................................................4

1.5 CONTROL LOCATIONS .................................................................................................................................4

DISASSEMBLY INSTRUCTIONS

2.1 MECHANICAL PARTS....................................................................................................................................5

2.1.1 FRONT GRILLE .....................................................................................................................................5

2.1.2 CABINET................................................................................................................................................5

2.1.3 CONTROL BOX .....................................................................................................................................5

2.2 AIR HANDLING PARTS..................................................................................................................................6

2.2.1 COVER (AT THE TOP) ..........................................................................................................................6

2.2.2 BLOWER................................................................................................................................................6

2.2.3 FAN ........................................................................................................................................................6

2.2.4 SHROUD................................................................................................................................................7

2.3 ELECTRICAL PARTS .....................................................................................................................................7

2.3.1 MOTOR ..................................................................................................................................................7

2.3.2 COMPRESSOR .....................................................................................................................................7

2.3.3 CAPACITOR ..........................................................................................................................................7

2.3.4 POWER CORD ......................................................................................................................................8

2.3.5 THERMISTOR........................................................................................................................................8

2.3.6 SYNCHRONOUS MOTOR.....................................................................................................................8

2.4 REFRIGERATION CYCLE..............................................................................................................................9

2.4.1 CONDENSER ........................................................................................................................................9

2.4.2 EVAPORATOR ......................................................................................................................................9

2.4.3 CAPILLARY TUBE .................................................................................................................................9

INSTALLATION

3.1 HOW TO INSTALL THE UNIT.......................................................................................................................12

3.2

HOW TO USE THE REVERSIBLE INLET GRILLE

3.3 WINDOW REQUIREMENTS.........................................................................................................................13

3.4 INSTALLATION KITS CONTENTS ...............................................................................................................13

3.5 SUGGESTED TOOL REQUIREMENTS .......................................................................................................14

3.6 CABINET INSTALLATION ............................................................................................................................15

TROUBLESHOOTING GUIDE

4.1 OUTSIDE DIMENSIONS...............................................................................................................................17

4.2 PIPING SYSTEM...........................................................................................................................................17

4.3 TROUBLESHOOTING GUIDE ......................................................................................................................18

..................................................................................................................

5. SCHEMATIC DIAGRAM

5.1 CIRCUIT DIAGRAM ......................................................................................................................................27

5.2 ELECTRONIC CONTROL DEVICE ..............................................................................................................28

5.3

COMPONENTS LOCATION(FOR MAIN P.C.B ASM

5.4

COMPONENTS LOCATION(FOR DISPLAY P.C.B ASM)

) .......................................................................................................29

.......................................................................................................29

6. EXPLODED VIEW..................................................................................................................................30

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LGE Internal Use Only

1. PREFACE

This service manual provides various service information, including the mechanical and electrical parts, etc. This room air conditioner was manufactured and assembled under a strict quality control system. The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.

1.1 SAFETY PRECAUTIONS

1. When servicing, set the POWER of CONTROL BOARD to Off and unplug the power cord.

2. Observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

3. After servicing, make an insulation resistance test to prevent the customer's exposure to shock hazards.

1.3 SPECIFICATIONS

MODELS

ITEMS

POWER SUPPLY

COOLING CAPACITY (Btu/h)

INPUT (W)

RUNNING CURRENT (A)

REFRIGERANT CHARGE (g)

OPERATING INDOOR (°C)

TEMPERATURE OUTDOOR (°C)

FAN, INDOOR

FAN, OUTDOOR

FAN SPEEDS, FAN/COOLING

FAN MOTOR

OPERATION CONTROL

ROOM TEMP. CONTROL

AIR DIRECTION CONTROL

CONSTRUCTION

PROTECTOR COMPRESSOR

FAN MOTOR

POWER CORD

DRAIN SYSTEM

NET WEIGHT (lbs/kg)

OUTSIDE DIMENSION

(W x H x D) (mm)

(inch)

17,500/18,000 17,500 18,000 21,000 23,500/24,000 24,000 24,000 23,000 23,000/23.500

M1804R

WG1800R

HBLG1800R

1,800/1,850 1,840 1,050 2,470 2,760/2,820 2,820 2,420 2,540 2,450/2,500

9.0/8.3 8.5 8.3 10.3 13.7/12.7 12.7/12.9 11.2 11.5 12.2/11.3

LWM1836TASL

WN1836QCG

1Ø, 208/230V, 60Hz

710(25.1 OZ) 995(35.1 OZ)/980(34.6 OZ) 880(31 OZ) 985(34.7 OZ)

120/54 143/65

26 x 16

/32 x 269/16 26 x 1627/32 x 305/16

660 x 428 x 675 660 x 428 x 770

LWM1863QAS

Y5USC18-6R

1Ø, 220V, 60Hz 1Ø, 220V, 60Hz

1.2

INSULATION RESISTANCE TEST

1. Unplug the power cord and connect a jumper between 2 pins (black and white).

2. The grounding conductor (green or green and yellow) is to be open.

3. Measure the resistance value with an ohm meter between the jumpered lead and each exposed metallic part on the equipment at all Mode [except POWER OFF].

4. The value should be over 1 MΩ.

WG2400R

LWN2131QAG

BLOWER TURBO

PROPELLER TYPE FAN WITH SLINGER-RING

VERTICAL LOUVER(RIGHT & LEFT)

HORIZONTAL LOUVER(UP & DOWN)

INTERNAL OVERLOAD PROTECTOR

INTERNAL THERMAL PROTECTOR

1.6m (3 WIRE WITH GROUNDING)

ATTACHMENT PLUG(CORD-CONNECTED TYPE)

DRAIN PIPE OR SPLASHED BY FAN SLINGER

HBLG2400R

M2403R

1Ø, 208/230V, 60Hz

26.7(DB) 19.4(WB)

35(DB) 23.9(WB)

6 POLES

TOUCH PANEL

THERMISTOR

SLIDE IN-OUT CHASSIS

LWN2432QAS

Y5USC24-6R LWC243NSMM0

1Ø, 220V, 60Hz 1Ø, 208/230V, 60Hz

3/3

LWN2433TCS LWC243NSMM2 HBLG2350E

* DB:Dry Bulb NOTE : Specifications are subject to minor change without notice for further improvement.

WB:Wet Bulb

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LGE Internal Use Only

1.4 FEATURES

Part A

Part B

VENTCLOSE OPEN

5 7

Powe r

Temp

Fan Speed

Timer Mode

Energy

Saver

Auto

Swing

• Designed for cooling only.

• Powerful and quiet cooling.

• Slide-in and slide-out chassis for the simple installation and service.

• Reversible inlet grille.

1.5 CONTROL LOCATIONS

• VENTILATION

The ventilation lever must be in the CLOSE position in order to maintain the best cooling conditions. When a fresh air is necessary in the room, set the ventilation lever to the OPEN position. The damper is opened and room air is exhausted.

NOTE: Before using the ventilation feature, make

the lever, as shown. First, pull down part to horizontal line with part .

Precaution: The Remote Control unit will not function

properly if strong light strikes the sensor window of the air conditioner or if there are obstacles between the Remote Control unit and the air conditioner.

• Side air-intake, side cooled-air discharge.

• Built in adjustable THERMISTOR.

• Washable one-touch filter.

• Compact size.

POWER BUTTON

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

OPERATION MODE SELECTION BUTTON

Select Cooling, or Fan or Dehumidification(Dry) mode with button. (Dry mode is not to all models.)

ON/OFF TIMER BUTTON

Set the time of starting and stopping operation. The timer is set by 1 hour.

FAN SPEED SELECTOR

Select the fan speed in three steps.

- High [F3] ➔ Low[F1] ➔ Med[F2]➔ High[F3]... .

ROOM TEMPERATURE SETTING BUTTON

Control the room temperature within a range of 60°F to 86°F by 1°F.

ENERGY SAVER

The fan stops when the compressor stops cooling. Approximately every 3 minutes the fan will turn on and check the room air to determine if cooling is needed.

AUTO SWING

Control the horizontal air direction by air swing system.

AUTO RESTART

In case the power comes on again after a power failure, the unit runs as previous setting operation. in some models)

(Available In some models)

(Available

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LGE Internal Use Only

2. DISASSEMBLY INSTRUCTIONS

— Before the following disassembly, POWER SWITCH is set to OFF and disconnected the power cord.

2.1 MECHANICAL PARTS

2.1.1 FRONT GRILLE

1. Open the inlet grille upward or downward.

2. Remove the screw which fastens the front grille.

3. Pull the front grille from the right side.

4. Remove the front grille. (See Fig. 1)

5. Re-install the component by referring to the removal procedure.

NOTE: Mark ∆ of inlet grille means opening direction.

2.1.2 CABINET

1. After disassembling the FRONT GRILLE, remove the screws which fasten the cabinet at both sides. Keep these for later use.

2. Remove the two screws which fasten the cabinet at back. (See Fig. 2)

3. Pull the base pan forward.

2.1.3 CONTROL BOX

1. Remove the front grille. (Refer to section 2.1.1)

2. Pull the base pan forward so that you can remove the 2 screws which fasten the cover control at the right side. (See Fig. 3)

3. Remove the 3 screws which fasten the control box. (See Fig. 3)

4. Discharge the capacitor by placing a 20,000 ohm resistor across the capacitor terminals.

5. Disconnect two wire housings in the control box.

6. Pull the control box forward completely.

7. Re-install the components by referring to the removal procedure. (See Fig. 3) (Refer to the circuit diagram found on page 24 in this manual and on the control box.)

Figure 1

Figure 2

Figure 3

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LGE Internal Use Only

2.2 AIR HANDLING PARTS

2.2.1 COVER (AT THE TOP)

1. Remove the front grille. (Refer to section 2.1.1)

2. Remove the cabinet. (Refer to section 2.1.2)

3. Remove 11 screws which fasten the brace and covers.

4. Remove the covers and the brace. (See Fig. 4)

5. Re-install the components by referring to the removal procedure, above.

2.2.2 BLOWER

1. Remove the cover. (Refer to section 2.2.1)

2. Remove the 3 screws which fasten the evaporator at the left side and the top side. (See Fig. 4)

3. Move the evaporator sideward carefully.

4. Remove the orifice from the air guide carefully.

5. Remove the clamp spring which is clamped to the boss of blower by hand plier. (See Fig. 5)

6. Pull the blower outward, without touching blades. (See Fig. 6)

7. Re-install the components by referring to the removal procedure, above.

Figure 4 (a) Figure 4 (b)

Figure 5

2.2.3 FAN

1. Remove the cabinet. (Refer to section 2.1.2)

2. Remove the brace and shroud cover. (Refer to section 2.2.1)

3. Remove the 5 screws which fasten the condenser.

4. Move the condenser sideways carefully.

5. Remove the clamp which secures the fan.

6. Remove the fan. (See Fig. 7)

7. Re-install the components by referring to the removal procedure, above.

Figure 6

Figure 7 (a) Figure 7 (b)

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LGE Internal Use Only

2.2.4 SHROUD

1. Remove the fan. (Refer to section 2.2.3)

2. Remove the 2 screws which fasten the shroud.

3. Remove the shroud. (See Fig. 8)

4. Re-install the component by referring to the removal procedure, above.

2.3 ELECTRICAL PARTS

2.3.1 MOTOR

1. Remove the cabinet. (Refer to section 2.1.2)

2. Remove the cover control and disconnect a wire housing in control box. (Refer to section 2.1.3)

3. Remove the blower. (Refer to section 2.2.2)

4. Remove the fan. (Refer to section 2.2.3)

5. Remove the 4 screws which fasten the motor. (See Fig. 9)

6. Remove the motor.

7. Re-install the components by referring to the removal procedure, above.

2.3.2 COMPRESSOR

1. Remove the cabinet. (Refer to section 2.1.2)

2. Discharge the refrigerant by using a Refrigerant Recovery System.

3. Disconnect the 3 leads from the compressor.

4. After purging the unit completely, unbraze the suction and discharge tubes at the compressor connections.

5. Remove the 3 nuts and the 3 washers which fasten the compressor. (See Fig. 10)

6. Remove the compressor.

7. Re-instill the components by referring to the removal procedure, above.

Figure 8 (a) Figure 8 (b)

Figure 9

2.3.3 CAPACITOR

1. Remove the control box. (Refer to section 2.1.3)

2. Remove the screw which fasten the display panel.

3. Disconnect the 2 leads from the rocker switch and remove the panel.

4. Remove a screw and unfold the control box. (See Fig. 11)

5. Remove the screw and the clamp which fastens the capacitor. (See Fig. 11)

6. Disconnect all the leads of capacitor terminals.

7. Re-install the components by referring to the removal procedure, above.

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Figure 10

Figure 11

LGE Internal Use Only

2.3.4 POWER CORD

1. Remove the control box. (Refer to section 2.1.3)

2. Unfold the control box. (Refer to section 2.3.3)

3. Disconnect the grounding screw from the control box.

4. Disconnect 2 receptacles.

5. Remove a screw which fastens the clip cord.

6. Pull the power cord. (See Fig. 12)

7. Re-install the component by referring to the removal procedure, above. (Use only one ground-marked hole for ground connection.)

8. If the supply cord of this appliance is damaged, it must be replaced by the special cord. (The special cord means the cord which has the same specification marked on the supply cord fitted to the unit.)

2.3.5 THERMISTOR

1. Remove the control box. (Refer to section 2.1.3)

2. Unfold the control box. (Refer to section 2.3.3)

3. Disconnect the thermistor terminals from main P.W.B assembly.

4. Remove the thermistor.

5. Re-install the components by referring to the removal procedure above. (See Figure 13)

Figure 12

2.3.6 SYNCHRONOUS MOTOR

1. Remove the control box. (Refer to section 2.1.3)

2. Unfold the control box. (Refer to section 2.3.3)

3. Remove the crankshaft.

4. Disconnect all the leads of the synchronous motor.

5. Remove the 2 screws which fasten the synchronous motor. (See Fig. 14)

6. Re-install the components by referring to the removal procedure, above.

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Figure 13

Figure 14

LGE Internal Use Only

2.4 REFRIGERATION CYCLE

CAUTION

Discharge the refrigerant system using Freon Recovery System. If there is no valve to attach the recovery system, install one (such as a WATCO A-1) before

venting the Freon after servicing the system.

. Leave the valve in place

2.4.1 CONDENSER

1. Remove the cabinet. (Refer to section 2.1.2)

2. Remove the brace and the shroud cover. (Refer to section 2.2.1)

3. Remove the 5 screws which fasten the condenser.

4. After discharging the refrigerant completely, unbraze the interconnecting tube at the condenser connections.

5. Remove the condenser.

6. Re-install the components by referring to notes. (See Fig. 15)

2.4.2 EVAPORATOR

1. Remove the cabinet. (Refer to section 2.1.2)

2. Remove the top cover and the brace. (Refer to section 2.2.1)

3. Discharge the refrigerant completely.

4. Remove the 3 screws which fasten the evaporator at the left side and the top side.

5. Move the evaporator sideward carefully and then unbraze the interconnecting tube at the evaporator connectors.

6. Remove the evaporator.

7. Re-install the components by referring to notes. (See Fig. 16)

Figure 15 (a)

Figure 15 (b)

2.4.3 CAPILLARY TUBE

1. Remove the cabinet. (Refer to section 2.1.2)

2. Remove the brace. (Refer to section 2.2.1)

3. After discharging the refrigerant completely, unbraze the interconnecting tube at the capillary tube.

4. Remove the capillary tube.

5. Re-install the components by referring to notes.

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Figure 16

LGE Internal Use Only

NOTES

— Replacement of the refrigeration cycle.

1. When replacing the refrigeration cycle, be sure to discharge the refrigerant system using a Freon

recovery System. If there is no valve to attach the recovery system, install one (such as a WATCO A-1) before venting the FreonTM. Leave the valve in place after servicing the system.

2. After discharging the unit completely, remove the desired component, and unbrace the pinch-off tubes.

3. Solder service valves into the pinch-off tube ports, leaving the valves open.

4. Solder the pinch-off tubes with Service valves.

5. Evacuate as follows.

1) Connect the vacuum pump, as illustrated Fig.

17A.

2) Start the vacuum pump, slowly open manifold

valves A and B with two full turns counterclockwise and leave the valves closed. The vacuum pump is now pulling through valves A and B up to valve C by means of the manifold

and entire system.

CAUTION

If high vacuum equipment is used, just crack valves A and B for a few minutes, then open slowly with the two full turns counterclockwise. This will keep oil from foaming and being drawn into the vacuum pump.

3) Operate the vacuum pump for 20 to 30 minutes,

until 600 microns of vacuum is obtained. Close valves A and B, and observe vacuum gauge for a few minutes. A rise in pressure would indicate a possible leak or moisture remaining in the system. With valves A and B closed, stop

the vacuum pump.

4) Remove the hose from the vacuum pump and

place it on the charging cylinder. See Fig. 17B. Open valve C. Discharge the line at the manifold connection.

5) The system is now ready for final charging.

6. Recharge as follows :

1) Refrigeration cycle systems are charged from the High-side. If the total charge cannot be put in the High-side, the balance will be put in the suction line through the access valve which you installed as the system was opened.

Connect the charging cylinder as shown in Fig. 17B. With valve C open, discharge the hose at the manifold connection.

3) Open valve A and allow the proper charge to enter the system. Valve B is still closed.

4) If more charge is required, the high-side will not take it. Close valve A.

5) With the unit running, open valve B and add the balance of the charge.

a. Do not add the liquid refrigerant to the Low-

side.

b. Watch the Low-side gauge; allow pressure to

rise to 30 lbs. c. Turn off valve B and allow pressure to drop. d. Repeat steps B and C until the balance of the

charge is in the system.

6) When satisfied the unit is operating correctly, use the pinch-off tool with the unit still running and clamp on to the pinch-off tube. Using a tube cutter, cut the pinch-off tube about 2 inches from the pinch-off tool. Use sil-fos solder and solder pinch-off tube closed. Turn off the unit, allow it to set for a while, and then test the leakage of the pinch-off connection.

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LGE Internal Use Only

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