Lg Ld50el Service Manual
Dehumidifier
SERVICE MANUAL
MODELS: DH300E/DH304
LD40/DH400M/GD40E
DH404E/DH400E/LD40E
DH504EL/LD50EL
LD65EL
http://biz.LGservice.com
CAUTION
- BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
- ONLY FOR AUTHORIZED SERVICE.
—2—
1. PREFACE
1.1 SAFETY PRECAUTIONS...........................................................................................................................3
1.2 FEATURES AND DIMENSIONS ................................................................................................................3
1.2.1 FEATURES........................................................................................................................................3
1.2.2 DIMENSIONS....................................................................................................................................3
1.3 MODEL NAMES .........................................................................................................................................4
1.4 SPECIFICATIONS......................................................................................................................................4
1.5 CONTROL TYPE........................................................................................................................................5
1.5.1 MECHANICAL TYPE.........................................................................................................................5
1.5.2 ELECTRONIC TYPE.........................................................................................................................5
1.6 HOW TO OPERATE DEHUMIDIFIER........................................................................................................6
1.6.1 HOW DOES THE DEHUMIDIFIER WORK? .....................................................................................6
1.6.2 LOCATION FOR THE DEHUMIDIFIER.............................................................................................6
1.6.3 MICRO SWITCH................................................................................................................................6
1.6.4 AUTO DEFROST...............................................................................................................................6
1.6.5 HUMIDITY CONTROLLER................................................................................................................7
1.6.6 DRYER .............................................................................................................................................7
2. CIRCUIT DIAGRAM............................................................................................................................8
3.
DISASSEMBLY INSTRUCTIONS
3.1 MECHANICAL PARTS .............................................................................................................................13
3.1.1 BUCKET AND AIR FILTER.............................................................................................................13
3.1.2 FRONT CASE AND TOP COVER...................................................................................................13
3.1.3 CABINET AND CONTROL BOX .....................................................................................................13
3.2 CONTROL PARTS ..................................................................................................................................14
3.2.1 POWER CORD ASSEMBLY...........................................................................................................14
3.2.2 SENSOR ASSEMBLY.....................................................................................................................14
3.2.3 PWB(PCB) ASSEMBLY, MAIN .......................................................................................................14
3.2.4 CAPACITOR....................................................................................................................................14
3.2.5 MICRO SWITCH ASSEMBLY.........................................................................................................14
3.2.6 COIL ASSEMBLY, SOLENOID .......................................................................................................15
3.2.7 CONTROL PANEL ..........................................................................................................................15
3.2.8 FAN AND MOTOR...........................................................................................................................16
3.2.9 DRAIN PAN.....................................................................................................................................16
3.3 REFRIGERATING CYCLE .......................................................................................................................17
3.3.1 CONDENSER, EVAPORATOR AND CAPILLARY TUBE...............................................................17
3.3.2 PTC OR OVERLOAD PROTECTOR (OLP) FOR RECIPROCATING COMPRESSOR .................17
3.3.3 ROTARY COMPRESSOR ..............................................................................................................17
3.4 HOW TO REPLACE REFRIGERATION SYSTEM...................................................................................18
4. TROUBLESHOOTING GUIDE...................................................................................................20
5. EXPLODED VIEWS..........................................................................................................................22
6. REPLACEMENT PARTS LIST...................................................................................................28
CONTENTS
—3—
1. PREFACE
This Service Manual provides various service information, including the mechanical and electrical parts.
This dehumidifier was manufactured and assembled under the strict quality control procedures.
The refrigerant is charged at the factory. Be sure to read the safety precaution prior to servicing the unit.
1.1 SAFETY PRECAUTIONS
• Disconnect the power supply before servicing or replacing any component.
• Do not cut off the grounding prong or alter the plug in any manner.
1.2 FEATURES AND DIMENSIONS
1.2.1 FEATURES
• Quiet operation
• High efficiency
• Adjustable humidistat
• Automatic defrost
• Automatic shut-off
• Bucket-full indicator light
• Easy roll casters
• Removable & large capacity bucket.
• Washable air filter
• Two-speed fan
• Drain hose connection.
• Low temperature operation (DH504EL/LD50EL/LD65EL)
1.2.2 DIMENSIONS (mm/in)
Figure 1
385 (15
5
/
32
)
FAN
SPEED
TIMER
High
Low
Continuous On.
4Hr. On/Off
2Hr. On/Off
HUMIDITY
CONTROL
BUCKET
FULL
POWER
AUTO RESTART
HUMIDITY
SETTING
340 (13
3
/
8
)
540 (21
1
/
4
)
ENERGY STAR
—4—
1.4 SPECIFICATIONS
1.3 MODEL NAMES
MODEL NAME
CAPACITY (Pints/24hrs) 30 40 50 65
MECHANICAL TYPE
ELECTRONIC TYPE
CONTROL
PANEL
DH304, DH300M DH400M,LD40 - -
DH300E GD40E,DH404E DH504EL LD65EL
DH400E,LD40E LD50EL
*NOTE:Specifications are subject to minor change without notice for further improvement.
DH304, DH300M
DH300E
LD65EL*
POWER SUPPLY(Phase,V,Hz)
INPUT(W) 480 580 630 830
RUNNING CURRENT(A) 5.9 5.7 5.7 8.4
ENERGY FACTOR(L/kw.h) 1.23 1.36 1.56 1.54
REFRIGERANT R134a
REFRIGERANT CHARGE, oz(g) 5.29(150) 4.94(140) 7.23(205) 8.82(250)
OPEN
CLOSE
SOLENOID VALVE*
Using Temp/Humid.:-4~122°F(-20~50°C)/95%RH
Rating:7W/90mA
COMPRESSOR MODEL No. LX86HAQG QS075CBA QA084CBC QA114CBD
P6R8MC
WORKING TIME:0.3~1.3sec
RETURN TIME:65sec
AMPERE 10A
VOLTAGE 200V
PROTECTOR
CAPACITOR - 40µF, 270VAC 35µF, 270VAC 35µF, 270VAC
MOTOR ASSEMBLY,SINGLE Shaded pole motor, 72W/1.4A, Thermal cutoff:266°F/130°C
Shaded pole motor, 91W/1.8A,
Thermal cutoff:266°F/130°C
SWITCH ASSEMBLY,MICRO
OUTSIDED MENSIONS
WxHxD,mm(in)
NET WEIGHT,kg(lbs) 23.1(51) 17.7(39) 20.4(45) 22.2(49)
OVERLOAD PROTECTOR FOR COMPRESSOR
INTERNAL PROTECTOR(FUSE)FOR MOTOR
1Ø, 115V,60Hz
R22
33.8°F(1±0.5°C)
50°F(10±0.5°C)
-
15A/250VAC
385X540X340(15 5/32 x 21 1/4 x 13 3/8)
P.T.C
ASSEMBLY
TYPE
-
TIME
MAXIMUM
MODELS
ITEMS
THERMISTOR
DH400M, LD40
GD40E, DH404E
DH400E, LD40E
DH504EL*
LD50EL*
—5—
Humidity Control
• When you first use the dehumidifier, turn the humidity
control to 5 or 6. If you still have moisture, turn the
humidity control to a higher setting.
MAX is the highest setting.
• When excess moisture and dampness odors are
gone, adjust the control to a lower setting. Use the
dehumidifier as long as excess moisture is present.
Fan Speed
• The fan control adjusts the fan speed.
Set the fan control to HIGH for maximum moisture
removal. When the humidity has been reduced and
quiet operation is preferred, set the fan control to
LOW.
Bucket Full Indicator
• This light glows when the water bucket is full and needs
to be emptied.
Power
• Operation starts when this button is pressed and stops
when the button is pressed again.
Auto Shut-Off
• This light glows when the bucket is full, or when
the bucket is removed or not placed in the proper
position. In these cases the Water Level Control
Switch shuts off the dehumidifier.
• When the light glows, check the bucket condition.
Fan Speed
• This controls the speed of the airflow.
• High: Fan speed is set to high.
• Low: Fan speed is set to low.
• When Fan Speed button is pressed, the fan speed
mode is changed.
Timer
• Press this button to select type of operation.
• Select continuous On for uninterrupted operation.
• Select either 2 or 4 hr. On/Off for cycled operation:
The unit will operate for 2 or 4 hours, and then shut
off completely for 2 or 4 hours.
The cycle repeats until you change the setting.
• When Timer button is pressed, the Timer indicator
lights shift as follow from 2hr.On/Off to 4hr.On/Off.
Auto Restart
•
Once power is restored after a power outage, the unit
returns to its previous operation setting after a 2 minute
delay.
The fan runs immediately when the power is restored.
Figure 2
Figure 3
Humidity Control
• This button controls the humidity in the room.
• Press button to raise the humidity setting.
• Press button to lower the humidity setting.
• The humidity setting can be set to a permanent "On"
setting or to a specific humidity setting between 35% and
70% in 5% increments.
• "On" setting: Dehumidifier runs continuously regardless
of humidity condition.
• 35% - 70% setting: Dehumidifier runs on and off
according to surrounding humidity conditions.
1.5 CONTROL TYPE
1.5.1 Mechanical type
1.5.2 Electronic type
5
6
4
3
2
Auto
Shut-Off
1
Off
Humidity Control
Constantly On.
4hr. On/Off
2hr. On/Off
TIMER
FAN
SPEED
High
Low
7
9
Max
HUMIDITY
SETTING
8
Fan Speed
HUMIDITY
CONTROL
High
Low
BUCKET
FULL
AUTO RESTART
POWER
—6—
1.6.1 HOW DOES THE DEHUMIDIFIER WORK?
Moist, humid air is drawn over a cold refrigerated
dehumidifying coil. Moisture in the air condenses on this
coil and drains into a bucket (or through the bucket into a
hose and drain).
Dry, clean air is drawn over the condenser where it is
actually heated several degrees and discharged out the
rear grill into the room. (See Figure 4)
■ It is normal for the surrounding air to become
slightly warmer as the dehumidifier operates.
This warming effect further reduces the relative humidity
of the surrounding air.
1.6.2 LOCATION FOR THE DEHUMIDIFIER
Allow at least 12 inches of space on all sides of the
unit for good air circulation. (See Figure 5)
■ The dehumidifier must be operated in an enclosed
area to be most effective.
■ Close all doors, windows and other outside
openings to the room.
Place the dehumidifier in a location that does not
restrict air flow into the front grille or out the rear grille.
The operation of dehumidifier in a basement will have
little or no effect in drying an adjacent enclosed
storage area, such as a closet, unless there is
adequate circulation of air in and out of the area.
Fan
Side View
Condenser
Evaporator
Motor
Compressor
Rear Grille
Bucket
Dry
Air Out
Humid
Air In
12"
12"
Figure 4
Figure 5
1.6 HOW TO OPERATE DEHUMIDIFIER
1.6.3 MICRO SWITCH
The micro switch assembly, which is located on the drain pan of inside unit, automatically shuts off the dehumidifier when the
bucket is full (note, the Auto Shut Off lights, to indicate bucket must be emptied). The bucket replaces in its place, the unit again
turns itself on.
1.6.4 AUTO DEFROST
When frost builds up on the cooling coils, the unit will automatically cycle off until the frost disappears. The fan continues to run.
NOTE: The unit will not operate satisfactorily if the room temperature is below 65˚F(18˚C). If the dehumidifier is
operated in low temperature conditions frost can form in the evaporator coil and the unit will cycle ON/OFF
repeatedly. In this case, please check your room temperature conditions and stop the unit.
NOTE:
The low temperature operation feature in the DH504EL, DH50EL and DH65EL models will continuously cycle up to
a temperature of 42°F(6°C).
—7—
1.6.5 HUMIDITY CONTROLLER
1.6.5.1 Mechanical Type
The humidity control can be set anywhere between Off and
Max for normal operation.
If you need more dehumidification, turn the Humidity Control
toward Max. If you need less dehumidification, turn the
Humidity Control toward Off.
The relative humidity range is from 20% to 80%. (See
Figure 6)
Turn the Humidity Control to Off to stop the unit manually.
1.6.5.2 Electronic Type
The humidity control can be set 'on' or 35%-70%
RH(Relative Humidity) for normal operation. (See Figure 7)
If you need drier air, press the Humidity Control button.
If you need moister air, press the Humidity Control
button.
Press the Power button to stop the unit manually.
1.6.6 DRYER (DH304, DH300M, DH300E)
Dryer is used to prevent capillary blockage from moisture in
the refrigerant system and H/E, condenser and evaporator.
Also, dryer is used to remove corrosion of the components.
NOTE: When dryer is replaced, proper injection to
capillary is needed. On opening the dryer, it
should be welded instantly. The oxidization of
dryer inside and all tubes inside after welding
can be prevented.
Dryer
HUMIDITY
CONTROL
HUMIDITY
SETTING
42% R.H
40%
7(30%)
6(35%)4(50%)
3(60%)
2(70%)
1(80%)
5(42%)
8(25%)
9(20%)
Max.Off
DEAD DIAL
Figure 6
Figure 7
Figure 8
—8—
2. CIRCUIT DIAGRAM
• MODEL : DH304, DH300M
Q'TY
PER SET
1
1
1
1
1
1
1
1
1
1
1
RE-
MARKS
S
S
S
S
S
S
S
S
S
S
S
1
2
3
4
5
6
7
8
9
10
11
DESCRIPTION
POWER CORD ASSEMBLY
SWITCH, ROCKER
MOTOR ASSEMBLY
PTC ASSEMBLY
RE-COMPRESSOR, SET
OLP
PWB(PCB) ASSEMBLY, DISPLAY
SENSOR ASSEMBLY
SWITCH ASSEMBLY, ROTARY
SWITCH ASSEMBLY, MICRO
PWB(PCB) ASSEMBLY, MAIN
DH304, DH300M
6411A20001Z
6600FX5001G
4681A20040J
6748C-0003D
2521C-A8626
6750C-0009E
6871A20289B
6877A30013L
6601A30001B
6600A30003C
6871A10142A
PART NO.
NO.
S: SERVICE PARTS A: ALTERNATE PARTS N: NOT SERVICE PARTS
—9—
• MODEL : DH300E
S: SERVICE PARTS A: ALTERNATE PARTS N: NOT SERVICE PARTS
Q'TY
PER SET
1
1
1
1
1
1
1
1
1
RE-
MARKS
S
S
S
S
S
S
S
S
S
1
2
3
4
5
6
7
8
9
DESCRIPTION
POWER CORD ASSEMBLY
MOTOR ASSEMBLY
PTC. ASSEMBLY
RE-COMPRESSOR, SET
OLP
PWB(PCB) ASSEMBLY, DISPLAY
SENSOR ASSEMBLY
SWITCH ASSEMBLY, MICRO
PWB(PCB) ASSEMBLY, MAIN
DH300E
6411A20001Z
4681A20040J
6748C-0003D
2521C-A8626
6750C-0009E
6871A20482A
6877A30013L
6600A30003C
6871A10141A
PART NO.
NO.
—10—
• MODEL : DH400M/LD40
Q'TY
PER SET
1
1
1
1
1
1
1
1
1
1
1
RE-
MARKS
S
S
S
S
S
S
S
S
S
S
S
1
2
3
4
5
6
7
8
9
10
11
DESCRIPTION
POWER CORD ASSEMBLY
SWITCH, ROCKER
MOTOR ASSEMBLY
CAPACITOR
COMPRESSOR (ROTARY), SET
OLP (ASSEMBLY)
PWB(PCB) ASSEMBLY, DISPLAY
SENSOR ASSEMBLY
SWITCH ASSEMBLY, ROTARY
SWITCH ASSEMBLY, MICRO
PWB(PCB) ASSEMBLY, MAIN
DH400M/LD40
6411A20001Z
6600FX5001G
4681A20040J
0CZZA20005N
2520UCAS003
6750U-L103A
6871A20289B
6877A30013M
6601A30001C
6600A30003C
6871A10142A
PART NO.
S: SERVICE PARTS A: ALTERNATE PARTS N: NOT SERVICE PARTS
NO.
—11—
• MODEL : GD40E/DH404E/DH400E/LD40E
Q'TY
PER SET
1
1
1
1
1
1
1
1
1
RE-
MARKS
S
S
S
S
S
S
S
S
S
1
2
3
4
5
6
7
8
9
DESCRIPTION
POWER CORD ASSEMBLY
MOTOR ASSEMBLY
CAPACITOR
COMPRESSOR,SET
OLP
PWB(PCB) ASSEMBLY,DISPLAY
SENSOR ASSEMBLY
SWITCH ASSEMBLY,MICRO
PWB(PCB) ASSEMBLY,MAIN
GD40E/DH404E/DH400E
LD40E
6411A20001Z
4681A20040J
0CZZA20005N
2520UCAS003
6750U-L013A
6871A20482A
6877A30013M
6600A30003C
6871A10141A
PART NO.
S: SERVICE PARTS A: ALTERNATE PARTS N: NOT SERVICE PARTS
NO.
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