Goldstar Wr-1820 Service Manual

Internal Use Only

http://biz.lgservice.com

Room Air Conditioner

SVC MANUAL(General)

MODEL : R1402 / R1802 / R1801H / WR-1820 LWN2120BCP LWM1822BCG

CAUTION

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

CONTENTS

1. PREFACE

1.1 SAFETY PRECAUTIONS ...............................2

1.2 INSULATION RESISTANCE TEST.................2

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

1.4 FEATURES .....................................................5

1.5 CONTROL LOCATIONS.................................5

DISASSEMBLY INSTRUCTIONS

2.1 MECHANICAL PARTS....................................7

2.1.1 FRONT GRILLE .....................................7

2.1.2 CABINET................................................7

2.1.3 CONTROL BOX .....................................7

2.2 AIR HANDLING PARTS..................................8

2.2.1 COVER (AT THE TOP)..........................8

2.2.2 BLOWER................................................8

2.2.3 FAN ........................................................9

2.2.4 SHROUD................................................9

2.3 ELECTRICAL PARTS .....................................9

2.3.1 MOTOR..................................................9

2.3.2 COMPRESSOR .....................................9

2.3.3 CAPACITOR ........................................10

2.3.4 POWER CORD ....................................10

2.3.5 THERMOSTAT ....................................10

2.3.6 ROTARY SWITCH ...............................11

2.3.7 SYNCHRONOUS MOTOR ..................11

2.4 REFRIGERATION CYCLE............................12

2.4.1 CONDENSER ......................................12

2.4.2 EVAPORATOR ....................................12

2.4.3 CAPILLARY TUBE...............................12

INSTALLATION

3.1 HOW TO INSTALL THE UNIT ......................15

3.2

HOW TO USE THE REVERSIBLE INLET GRILLE

3.3 WINDOW REQUIREMENTS.........................16

3.4 INSTALLATION KITS CONTENTS...............16

3.5 SUGGESTED TOOL REQUIREMENTS.......17

3.5.1 PREPARATION OF CHASSIS.............17

3.6 CABINET INSTALLATION ............................18

TROUBLESHOOTING GUIDE

4.1 OUTSIDE DIMENSIONS...............................20

4.2 PIPING SYSTEM ..........................................20

4.3 TROUBLESHOOTING GUIDE......................21

.......

5. SCHEMATIC DIAGRAM

5.1 CIRCUIT DIAGRAM......................................26

6. EXPLODED VIEW..................................29

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 the unit, set the ROTARY SWITCH or POWER SWITCH 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 the unit, make an insulation resistance test to protect the customer from being exposed to shock hazards.

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 & 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 the positions (except OFF or O) of the ROTARY SWITCH.

4. The value should be over 1MΩ.

- 2 -

LGE Internal Use Only

1.3 SPECIFICATIONS

1.3.1 FOR R1402/R1802

MODELS

R1402 R1802 WR-1820

LWM1822BCG

LWN2120BCP

ITEMS

POWER SUPPLY

1Ø, 115V, 60Hz

1Ø, 208/230V, 60Hz

1Ø, 220V, 60Hz

COOLING CAPACITY (Btu/h) 14,000 17,500/ 18,000 18,000 24,000

INPUT (W) 1,380 1,800/ 1,850 2,090 2,440

RUNNING CURRENT (A) 12.0 9.0/ 8.3 9.8 11.5

REFRIGERANT (R-22) CHARGE(g)

OPERATING TEMPERATURE

INDOOR (°C) 26.7(DB) 19.4(WB)

OUTDOOR (°C) 35(DB) 23.9(WB)

680(24.0 OZ) 800(28.2 OZ) 710(25.0 OZ) 630(22.2 OZ) 700(24.7 OZ)

EVAPORATOR 3 ROW 15 STACKS

CONDENSER

2 ROW 19 STACKS, L-BENDED TYPE

FAN, INDOOR BLOWER

FAN, OUTDOOR PROPELLER TYPE FAN WITH SLINGER-RING

FAN SPEEDS, FAN/COOLING 2/3

FAN MOTOR 6 POLES

REMARK

LOUVEREDFIN TYPE

OPERATION CONTROL ROTARY SWITCH

ROOM TEMP. CONTROL THERMOSTAT

VERTICAL LOUVER(RIGHT & LEFT)

AIR DIRECTION CONTROL

HORIZONTAL LOUVER(UP & DOWN)

CONSTRUCTION SLIDE IN-OUT CHASSIS

COMPRESSOR

PROTECTOR

EXTERNAL

OVERLOAD

INTERNAL OVERLOAD PROTECTOR

PROTECTOR

FAN MOTOR INTERNAL THERMAL PROTECTOR

1.6m (3 WIRE WITH GROUNDING)

1.8m (3 WIRE WITH GROUNDING)

POWER CORD

1.8m

(3WIRE WITH

GROUNDING)

ATTACHMENT PLUG(CORD-CONNECTED TYPE)

DRAIN SYSTEM DRAIN PIPE OR SPLASHED BY FAN SLINGER

NET WEIGHT (lbs/kg) 117/53 120/54

OUTSIDE DIMENSION (inch) 26 x 16

/32

x 26

/16

(W x H x D) (mm) 660 x 428 x 675

- 3 -

LGE Internal Use Only

1.3.2 FOR R1801H

MODELS

ITEMS

POWER SUPPLY

CAPACITY (Btu/h)

COOLING

HEATING

OPERATING TEMPERATURE

REFRIGERANT (R-22) CHARGE(g)

EVAPORATOR

CONDENSER

INPUT (W)

RUNNING CURRENT

E.E.R. (Btu/W.h)

CAPACITY (Btu/h)

INPUT (W)

RUNNING CURRENT

COOLING

HEATING

INDOOR (°C)

OUTDOOR (°C)

INDOOR (°C)

OUTDOOR (°C)

(A)

R1801H

1Ø, 208/ 230V, 60Hz

17,500/ 18,000

1,940/ 2,000

9.6/ 9.0

9.0

9,800/ 12,000

3,100/ 3,670

15.0/ 16.0

26.7 (DB) 19.4 (WB)

35 (DB) 23.9 (WB)

21.1 (DB) 15.6 (WB)

8.3 (DB) 6.1 (WB)

740 (26.1 OZ)

3 ROW 15 STACKS

2 ROW 19 STACKS, L-BENDED TYPE

REMARK

LOUVEREDFIN TYPE

FAN, INDOOR

FAN, OUTDOOR

FAN SPEEDS (FAN/COOLING/HEATING)

FAN MOTOR

OPERATION CONTROL

ROOM TEMP. CONTROL

AIR DIRECTION CONTROL

CONSTRUCTION

ELECTRIC HEATER

COMPRESSOR

PROTECTOR

POWER CORD

DRAIN SYSTEM

NET WEIGHT (lbs/kg)

FAN MOTOR

ELECTRIC HEATER

BLOWER

PROPELLER TYPE FAN WITH SLINGER-RING

1/ 2/ 2

6 POLES

ROTARY SWITCH

THERMOSTAT

VERTICAL LOUVER (RIGHT & LEFT)

HORIZONTAL LOUVER (UP & DOWN)

SLIDE IN-OUT CHASSIS

3.5 KW, 230V

INTERNAL OVERLOAD PROTECTOR

INTERANL THERMAL PROTECTOR

FUSE LINK, BIMETAL THERMOSTAT

1.6m (3 WIRE WITH GROUDING)

ATTACHMENT PLUG (CORD-CONNECTED TYPE)

DRAIN PIPE OR SPLASHED BY FAN SLINGER

123/ 56

OUTSIDE DIMENSION (inch)

(W x H x D) (mm)

- 4 -

26 x 1627/32 x 269/16

660 x 428 x 675

LGE Internal Use Only

1.4 FEATURES

Med Fan

Off

Low Fan

High Cool

Med Cool

Low Cool

Operation

Thermostat

Off On

Auto Swing

Part A

Part B

VENTCLOSE OPEN

• 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

1.5.1 COOLING ONLY MODEL

• 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 A to horizontal line with part B .

• THERMOSTAT

Thermostat will automatically control the temperature of the room. Select the higher number for the lower temperature of the room. The temperature is selected by positioning the knob to the desired position.

The 5 or 6 position is a normal setting for average conditions.

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

• Built in adjustable THERMOSTAT.

• Washable one-touch filter.

• Compact size.

• OPERATION

OFF : Turns the air conditioner off. MED FAN : Permits the

medium

fan speed operation

without cooling.

LOW FAN : Permits the low fan speed operation

without cooling.

HIGH COOL: Permits cooling with the high fan speed

operation.

MED COOL : Permits cooling with the medium fan

speed operation.

LOW COOL: Permits cooling with the low fan speed

operation.

• AUTO SWING

ON : Air swing is operated while OPERATION knob

is set to the COOL position.

OFF :Stops the operation of air swing.

- 5 -

LGE Internal Use Only

1.5.2 COOLING AND HEATING MODEL

Thermostat

Operation

Wait Three Minutes

Before Restarting

CoolerWarmer

Off

Auto Swing

Off On

Fan Fan

Low Heat Low Cool

High CoolHigh Heat

• CAUTION

When the air conditioner has been performing its cooling operation and is turned off or set to the fan position, wait at least 3 minutes before resetting to the cooling operation again.

• THERMOSTAT

Turn the thermostat control to the desired setting. The centrol position is a normal setting for average conditions. You can change this setting, if necessary, in accordance with your temperature preference.

The thermostat automatically controls cooling or heating, but the fan runs continuously whenever the air conditioner is in operation. If the room is too warm, turn the thermostat control clockwise. If the room is too cool, turn the themostat control anticlockwise.

• OPERATION

OFF ( ) :Turns the air conditioner off. FAN ( ) : Permits the low fan speed

operation without cooling (heating).

LOW COOL ( ) : Permits cooling with the low fan

speed operation.

HIGH COOL( ) : Permits cooling with the high fan

speed operation.

LOW HEAT ( ) : Permits heating with the low fan

speed operation.

HIGH HEAT ( ) : Permits heating with the high fan

speed operation.

• AUTO SWING

ON : Starts the operation of air swing.

OFF : Stops the operation of air swing.

• Before you turn the unit off, please press the Auto Swing switch to off.

A slight heat odor may come from the unit when first switching to HEAT after the cooling season is over. This odor, caused by fine dust particles on the heater, will disappear quickly.

- 6 -

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.

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 26~28 in this manual and on the control box.)

Figure 1

Figure 2

Figure 3

- 7 -

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 2 terminals carefully (See Fig. 5, at Electric Heater Model)

5. Remove the 3 screws which fasten the Heater Cover. (See Fig. 5, at Electric Heater Model)

6. Remove the Heater Cover. (See Fig. 5, at Electric Heater Model)

7. Remove the orifice from the air guide carefully. (See Fig. 6, No orifice at Electric Heater Model.)

8. Remove the clamp which secures the blower with plier. (See Fig. 6)

9. Remove the blower with plier or your hand without touching blades. (See Fig. 7)

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

Figure 4

Figure 5

Figure 6

- 8 -

Figure 7

LGE Internal Use Only

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. 8)

7. Re-install the components by referring to the

removal procedure, above.

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. 9)

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. 10)

6. Remove the motor.

7. Re-install the components by referring to the

removal procedure, above.

Figure 8

Figure 9

2.3.2 COMPRESSOR

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

2. 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 servicing the system.

3. Disconnect the 3 leads from the compressor.

4. After purging the unit completely, unbrace the

suction and discharge tubes at the compressor connections.

5. Remove the 3 nuts and the 3 washers which

fasten the compressor.

6. Remove the compressor. (See Fig. 11)

7. Re-instill the components by referring to the

removal procedure, above.

. Leave the valve in place after

Figure 10

Figure 11

- 9 -

LGE Internal Use Only

+ 21 hidden pages