LG LD301EL Dehumidifier Service Manual

CAUTION - BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. - ONLY FOR AUTHORIZED SERVICE. Website:http://www.lgservice.com Dehumidifier SERVICE MANUAL MODEL: LD301EL Internal Use Only

—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 SPECIFICATIONS ......................................................................................................................................4 1.4 CONTROL TYPE ........................................................................................................................................5 1.4.1 ELECTRONIC TYPE .........................................................................................................................5 1.5 HOW TO OPERATE DEHUMIDIFIER ........................................................................................................6 1.5.1 HOW DOES THE DEHUMIDIFIER WORK? .....................................................................................6 1.5.2 LOCATION FOR THE DEHUMIDIFIER.............................................................................................6 1.5.3 AUTO DEFROST...............................................................................................................................6 1.5.4 HUMIDITY CONTROLLER ................................................................................................................7 2. CIRCUIT DIAGRAM............................................................................................................................8 3. DISASSEMBLY INSTRUCTIONS 3.1 MECHANICAL PARTS .............................................................................................................................9 3.1.1 BUCKET AND AIR FILTER .............................................................................................................9 3.1.2 HOSE COVER AND REAR GRILLE................................................................................................9 3.1.3 CONTROL BOX COVER AND FRONT GRILLE..............................................................................9 3.2 CONTROL PARTS ..................................................................................................................................10 3.2.2 POWER CORD ASSEMBLY ...........................................................................................................10 3.2.8 SHROUD AND MOTOR...................................................................................................................12 3.2.3 PWB(PCB) ASSEMBLY, MAIN .......................................................................................................10 3.2.1 CAPACITOR ....................................................................................................................................10 3.2.5 MICRO SWITCH ASSEMBLY .........................................................................................................10 3.2.6 CONTROL PANEL ..........................................................................................................................11 3.2.7 FAN..................................................................................................................................................12 3.2.9 DRAIN PAN .....................................................................................................................................12 3.3 REFRIGERATING CYCLE .......................................................................................................................13 3.3.1 CONDENSER, EVAPORATOR AND CAPILLARY TUBE ...............................................................13 3.3.2 ROTARY COMPRESSOR ..............................................................................................................13 3.4 HOW TO REPLACE REFRIGERATION SYSTEM ...................................................................................14 4. TROUBLESHOOTING GUIDE ...................................................................................................16 5. EXPLODED VIEWS ..........................................................................................................................18 CONTENTS 3.2.4 CONTROL BOX...............................................................................................................................10

—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 bucket. • Washable air filter • Two-speed fan • Drain hose connection. • Low temperature operation 1.2.2 DIMENSIONS (mm) Figure 1 265 540 343

—4— 1.3 SPECIFICATIONS *NOTE: Specifications are subject to minor change without notice for further improvement. CAPACITY(Pints/24hrs) 30 POWER SUPPLY(Phase,V,Hz) 1Ø, 115V,60Hz INPUT(W) 420 RUNNING CURRENT(A) 4.0 ENERGY FACTOR(L/kw.h) 1.40 REFRIGERANT REFRIGERANT CHARGE, oz(g) 4.23(120) THERMISTOR OPEN 28.4˚F CLOSE 41˚F COMPRESSOR MODEL No. GS040CAA PROTECTOR OVERLOAD PROTECTOR FOR COMPRESSOR INTERNAL PROTECTOR(FUSE) CAPACITOR MOTOR ASSEMBLY,SINGLE SWITCH ASSEMBLY,MICRO 15A/250VAC OUTSIDED MENSIONS WxHxD,mm(in) 343X540X265(13 1/2 x 21 1/4 x 10 3/7) NET WEIGHT,kg(lbs) 14.1(31.1) MODELS ITEM LD301EL 45μF,270VAC Conductivity motor,37W/0.36A,Thermal cutoff:266 °FV/130°C R410A R410A Model Refrigerant Pressure 1.6 times higher than the R22 Model. After vacuum, charge Refrigerant is completed within 3 minutes. Refrigerant cycle should be sealed quickly after charging to avoid leakage. Refrigerant R410A charging equipment should be separated with other Refrigerants. Refrigerant stored in low temperatures condition, below 10°C

—5— 5. Bucket Full Indicator • This light glows when the water bucket is full and needs to be emptied. 1. Power • Operation starts when this button is pressed and stops when the button is pressed again. 3.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. 4.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. 6. 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. 2. 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. Figure 3 1.4 CONTROL TYPE 1.4.1 Electronic type Bucket Full 2 hr. on/off 4 hr. on/off High Low 6 5 3 4 1 2

—6— 1.5.1 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. 1.5.2 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. 1.5 HOW TO OPERATE DEHUMIDIFIER 1.5.3 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 LD301EL model will continuously cycle up to a temperature of 42°F(6°C) . Fan Side View Condenser Evaporator Motor Compressor Rear Grille Bucket Dry Air Out Humid Air In 12" 12" Figure 4 Figure 5

—7— 1.5.4 HUMIDITY CONTROLLER 1.5.4Electronic 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. Figure 7 Bucket Full 2 hr. on/off 4 hr. on/off High Low

—8 — • MODEL : LD301EL CN-DISP RY-COMP CN-MOTOR CN-N ETH 2. CIRCUIT DIA GRAM WIRING DIAGRAM MEZ61926910 MAIN PCB CN-MOTOR CN-AC1 RY-COMP O L - Y R I H - Y R FUSE 250V T3.15A POWER SMPS P S I D - N C HUMIDITY SENSOR THERMISTOR BUCKET S/W 4 3 BR BL RD WH(BL) (N) BK(BR) (L) L B BK(HI) RD(LOW) OR(COM) MOTOR R C S O.L.P COMP. GN/YL GN/YL R O T I C A P A C C H YL F YL GN/YL DISPLAY P.C.B BK ETH

3.1 MECHANICAL PARTS 3.1.1 BUCKET AND AIR FILTER 1. Press the power button off. 2. Disconnect the power supply. 3. Remove the bucket. (See Figure 9) 4. Pull out the air filter. (See Figure 10) 3.1.2 HOSE COVER AND REAR GRILLE 2. Remove 10 screws which fasten the rear grille. 3. Pull the rear grille backward .(See Figure 12) 3.1.3. CONTROL BOX COVER AND FRONT GRILLE 1. Remove the Rear Grille according to the procedure above. 2. Remove 2 screws that fasten Control box cover. (See Figure 13) 3. Remove cover on Control box. —9— 3. DISASSEMBLY INSTRUCTIONS Figure 9 Figure 10 Figure 11 Figure 12 1. Remove the hose cover and hose cap. (See Figure 11) Figure 13 4. Remove 4 screws that secure the front grille. 6. Remove two hooks out of shroud and then pull the front grille forward. (See Figure 14-1,14-2) Figure 14-1 Figure 14-2 5. Disconnect the leads between diplay PCB and other parts. Cap Cover hook

3.2 CONTROL PARTS 3.2.2 POWER CORD ASSEMBLY 1. After remove the cover and the capacitor, remove the screw that holds the ground wire in power cord Assy. 2. Disconnect the remaining leads of the power cord from the PWB(PCB) ASSEMBLY, MAIN, then remove it from the control box.(See Figure 16) 3.2.4 PWB(PCB) ASSEMBLY, MAIN 1.Disconnect all leads of the motor and the compressor from PWB(PCB) ASSEMBLY, MAIN. 1. Remove the screw which fastens the PWB(PCB) ASSEMBLY, MAIN and pull it out after unhooking from 2 rectangular holes of the control box (lower). (See Figure 18) 3.2.5 MICRO SWITCH ASSEMBLY 1. After remove the control box according to the the procedure above. —10— Figure 17 Figure 16 Figure 19 Figure 15 3.2.1 CAPACITOR 1. Remove the screw that fastens the capacitor. (See Figure 15) 3.2.3 CONTROL BOX Figure 18 2. Remove two screws which fasten the control box and then pull the control box out of the product. (See Figure 17) Power cord bushing screw 2. Remove the screws and pull out the micro switch from the drain pan. (See Figure 19) 2. Remove capacitor from the control box and then disconnect all leads from it.

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LG LD301EL Dehumidifier Service Manual

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