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
2.
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
3.
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
4.
TROUBLESHOOTING GUIDE
4.1 OUTSIDE DIMENSIONS...............................20
4.2 PIPING SYSTEM ..........................................20
4.3 TROUBLESHOOTING GUIDE......................21
.......
15
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.
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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.
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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
27
/32
x 26
9
/16
(W x H x D) (mm) 660 x 428 x 675
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 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)
(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)
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 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
6
7
8
9
5
1
2
3
4
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.
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 5 -
LGE Internal Use Only
1.5.2 COOLING AND HEATING MODEL
o
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.
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 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
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 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
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 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.
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TM
. Leave the valve in place after
TM
Figure 10
Figure 11
- 9 -
LGE Internal Use Only
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