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LG LWHD1800HR Service Manual

LG LWHD1800HR Manual

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LG LWHD1800HR | Service Manual - Page 1
website http://www.lgservice.com LG LG Room Air Conditioner SERVICE MANUAL MODEL: LWHD1800HR, LWHD2400HR LWHD1807HR, LWHD2400HRY7 CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
LG LWHD1800HR | Service Manual - Page 2
Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions...3 Dimensions...5 Product Specifications ...6 Installation ...8 How to Install the Unit ...8 How to use the Reversible Inlet grille ...8 Window Requirements ...9 Installation Kits Contents (some models including installation kit
LG LWHD1800HR | Service Manual - Page 3
. Be sure not to do. Be sure to follow the instruction. s Installation WARNING Do not use damaged power cord plugs, or a loose socket. Always use the power plug and socket with the ground terminal. • There is risk of fire or electric shock. • There is risk of electric shock. Service Manual 3
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(customer). • There is risk of fire, electric shock, explosion, or injury. Be cautious when unpacking and installing the product. Do not store or use flammable gas or combustibles near the air conditioner. • Sharp edges could cause injury. Be especially careful of the case edges and the fins on
LG LWHD1800HR | Service Manual - Page 5
that could cause harm to the air conditioner. NOTICE This symbol indicates special notes. Outside Dimensions Dimensions D W H Dimension W H D Model mm(inch) mm(inch) mm(inch) LWHD1800HR 660 (26) 428 (16 27/32) 675 (26 9/16) LWHD2400HR 660 (26) 428 (16 27/32) 770 (30 5/16) Service Manual 5
LG LWHD1800HR | Service Manual - Page 6
Specifications ITEMS MODELS LWHD1800HR (CORD-CONNECTED TYPE) DRAIN SYSTEM DRAIN PIPE OR SPLASHED BY FAN SLINGER NET WEIGHT OUTSIDE DIMENSION (lbs/kg) (inch) 123/56 26 X 16 27/32 X 26 9/16 on the produst since this specification may be changed for improving performance. 6 Room Air Conditioner
LG LWHD1800HR | Service Manual - Page 7
Specifications ITEMS MODELS PLUG(CORD-CONNECTED TYPE) DRAIN SYSTEM DRAIN PIPE OR SPLASHED BY FAN SLINGER NET WEIGHT OUTSIDE DIMENSION (lbs/kg) (inch) 123/56 26 X 16 27/32 X 26 9/16 on the produst since this specification may be changed for improving performance. 7 Room Air Conditioner
LG LWHD1800HR | Service Manual - Page 8
front grille. 5. Insert the filter and attach the front grille to the cabinet. B. IF YOU WANT TO PULL OUT THE FILTER DOWNWARD; THE GRILLE IS ALREADY DESIGNED FOR THAT WAY. 30-60" Installation 1/4 Bubble Level AWNING FENCE HEAT RADIATION About 1/2" Over 20" b (a) (b) (c) Service Manual 8
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be less than 1 1/4". Installation Kits Contents (some models including installation kit) Top retainer bar guide(2) Window locking bracket Sill bracket(2) Support bracket(2) Right frame curtain Type A (14) Type B (7) Type C (5) Type D (2) Carriage Bolt (2) Lock Nut (4) 9 Room Air Conditioner
LG LWHD1800HR | Service Manual - Page 10
Suggested tool Requirements Installation SCREWDRIVER(+, -), RULER, KNIFE, HAMMER, guides. Foam-PE Figure 3 Top retainer bar Top retainer bar Foam-PE 8. Fasten the curtains to the unit with 10 screws (Type A) at both sides. Screw (Type A) Figure 4 Frame guide Screw(Type A) Service Manual
LG LWHD1800HR | Service Manual - Page 11
Figure 6 Support Bracket Lock nut Machine screw (Type D) and lock nut Outer edge of window sill Screw(Type B) Sill bracket Top retainer bar Figure 7 Window stool Front angle Window sash Top retainer bar Foam-PE Cabinet Frame curtain Foam-PE Figure 8 Sash track 11 Room Air Conditioner Figure
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.34) 11. Lift the inlet grille and secure it with a screw (Type A) through the front grille. (See Fig. 14) 12. Window installation of room air conditioner is now completed. Figure 14 Figure 15 Installation Screw(Type C) Power Cord Screw (Type A) Foam-Strip Window locking bracket Service Manual 12
LG LWHD1800HR | Service Manual - Page 13
. To turn the air conditioner OFF, push the button again. This button takes priority over any other buttons. 2. OPERATION MODE SELECTION BUTTON Everytime you push this button, it will toggle COOL, FAN and HEAT. 3. ON/OFF TIMER BUTTON Everytime you push this button, timer is set as follows.(1Hour
LG LWHD1800HR | Service Manual - Page 14
set to off and disconnected the power cord. Mechanical parts 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. 16) 5. Re-install Re-install the
LG LWHD1800HR | Service Manual - Page 15
6. Remove the Heater Cover.(See Fig. 20) 7. Remove the orifice from the air guide carefully. (See Fig. 21) 8. Remove the clamp which secures the blower with install the components by referring to the removal procedure, above. Figure 20 Figure 21 Disassembly 15 Room Air Conditioner Figure 22
LG LWHD1800HR | Service Manual - Page 16
shroud. (See Fig. 24) 4. Re-install the component by referring to the removal procedure, above. Electrical parts 8. Motor 1. Remove the cabinet. ( recovery system, install one (such as a watco a-1) before venting the FreonTM . Leave the valve in place after servicing the system. 26 Service Manual 16
LG LWHD1800HR | Service Manual - Page 17
the special cord. (The special cord means the cord which has the same specification marked on the supply cord fitted to the unit.) Figure 28 12. THERMISTOR thermistor. 5. Re-install the components by referring to the removal procedure above. (See Figure 30) 17 Room Air Conditioner Figure 29 Disassembly
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section 10) 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. 30) 6. Re-install the components by referring to the removal procedure, above. Figure 30 Service Manual 18
LG LWHD1800HR | Service Manual - Page 19
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. 16. CONDENSER 1. capillary tube. 4. Remove the capillary tube. 5. Re-install the components by referring to notes. Figure 32 19 Room Air Conditioner
LG LWHD1800HR | Service Manual - Page 20
High-side, the balance will be put in the suction line through the access valve which you installed as the system was opened. 2) Connect the charging cylinder as shown in Fig. 35B. off the unit, allow it to set for a while, and then test the leakage of the pinch-off connection. Service Manual 20
LG LWHD1800HR | Service Manual - Page 21
Tools to remove components, Service valve. CONDENSER (HIGH PRESSURE SIDE) COMPOUND GAUGE MANIFOLD GAUGE B A CAPILLARY TUBE SEE INSETS BELOW EVAPORATOR (LOW PRESSURE SIDE) COMPRESSOR A B EXTERNAL VACUUM PUMP Figure 31A-Pulling Vacuum 21 Room Air Conditioner LOW HI B A CHARGING CYLINDER
LG LWHD1800HR | Service Manual - Page 22
Schematic Diagram Wiring Diagram s ELECTRIC HEATING MODEL Schematic Diagram Service Manual 22
LG LWHD1800HR | Service Manual - Page 23
Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER COIL FAN MOTOR CAPILLARY TUBE COMPRESSOR LOW PRESSURE VAPOR ROOM AIR HEAT LOAD CONDENSER COILS VAPOR INLET HOT DISCHARGED AIR LIQUID PRESSURE DROP 23 Room Air Conditioner MOTOR OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH
LG LWHD1800HR | Service Manual - Page 24
Troubleshooting Guide Troubleshooting Guide In general, possible trouble is classified in two kinds. The one is called Starting Failure which is caused from an electrical defect, and the other is ineffective Air of inlet & outlet air ; 44~50°F(7~10°C) Replacement of compressor. Service Manual 24
LG LWHD1800HR | Service Manual - Page 25
Troubleshooting Guide Fails to Start Check of power source. Check of control switch setting. Compressor only fails to start. Drop motor insulation ( ) Replacement of compressor (Motor damaged) 25 Room Air Conditioner Regular but fails to start. Replacement of compressor (locking of rotor,
LG LWHD1800HR | Service Manual - Page 26
Troubleshooting Guide Room Air Conditioner Voltage Limits NAME PLATE RATING 208~230±10% 115±10% MINIMUM 187V 104V MAXIMUM 253V 126V COMPLAINT Fan correct. Check for continuity, refer to the wiring diagram for terminal identification. Replace the switch if circuit is open. Service Manual 26
LG LWHD1800HR | Service Manual - Page 27
servicing.) Compressor Overload Voltage Overload Fan motor Condenser air flow restriction Condenser fins (damaged) Capacitor Wiring Refrigerating system Air filter the set screw or clamp. If loose or missing, correct. If the blower or fan is hitting air guide, rearrange the air handling parts.
LG LWHD1800HR | Service Manual - Page 28
135314 159830 264110 567480 268711-1 137215 238310 268711-2 554160 249950 W0CZZ 550140 552102 352115-2 352113 352115-1 352111 146812 35211A 753010 147581-2 147581-1 267110 135510 753000 Service Manual 28
LG LWHD1800HR | Service Manual - Page 29
147582 LOUVER, VERTICAL 148000 BRACE 149980 SHROUD 159830 FILTER(MECH), A/C 238310 ESCUTCHEON 249950 CONTROL BOX SINGLE 35211A TUBE ASSEMBLY, SUCTION SINGLE 749750 AIR GUIDE ASSEMBLY 354210 EVAPORATOR ASSEMBLY, FIRST 359012 FAN 29 Room Air Conditioner PART NO. LWHD1800HR LWHD2400HR 3041A30002Y
LG LWHD1800HR | Service Manual - Page 30
ASSEMBLY,SYNC LOUVER,HORIZONTAL LOUVER,HORIZONTAL LOUVER,VERTICAL BRACE SHROUD FILTER(MECH),A/C ESCUTCHEON CONTROLBOXA SSEMBLY,SINGLE POWERCORD ASSEMBLY THERMISTOR ASSEMBLY PWB 731273 INSTALL PART ASSEMBLY,SINGLE 749740 135515 GUIDE COVER ASSEMBLY,TOP(INDOOR) 30 Room Air Conditioner PART NO(
LG LWHD1800HR | Service Manual - Page 31
P/No.: 3828A20841B March, 2007 Printed in China