Related Manuals for LG LA140CE
Summary of Contents for LG LA140CE
-
Page 1: Service Manual
LG Room Air Conditioner SERVICE MANUAL MODELS: LA140CE CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL. -
Page 2: Table Of Contents
Air Conditioner Service Manual TABLE OF CONTENTS LG Model Name ...............................3 Safety Precautions............................4 Dimensions ..............................8 Symbols used in this Manual........................8 Indoor Unit..............................9 Outdoor Unit...............................9 Product Specifications ..........................10 Installation ..............................11 Select the Best Location .........................11 Piping Length and Elevation........................11 Fixing Installation Plate ..........................12 Drill a Hole in the wall..........................12... -
Page 3: Lg Model Name
LG Model Name 2003 Code Type Code of Model Meaning Producing Center, L: Chang-won R22 N: India Refrigerant A: Chang-won R410A Z: Brazil C: Chang-won R407C D: Indonesia T: China M: Mexico K: Turkey R22 V: Vietnam E: Turkey R410A... -
Page 4: Safety Precautions
Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. I Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. This symbol indicates the possibility of death or serious injury. - Page 5 Safety Precautions Always install an air leakage Do not keep or use flammable Ensure that an installation frame breaker and a dedicated switch- gases or combustibles near the of the outdoor unit is not dam- ing board. air conditioner. aged due to use for a long time. •...
- Page 6 Safety Precautions Take the power plug out if neces- Do not use the power cord near Do not open the suction inlet of the indoor/outdoor unit during sary, holding the head of the the heating tools. plug and do not touch it with wet operation.
- Page 7 Safety Precautions I Installation Install the drain hose to ensure that drain can be Install the product so that the noise or hot wind securely done. from the outdoor unit may not cause any damage to the neighbors. • Otherwise, it may cause water leakage. •...
-
Page 8: Dimensions
Dimensions Dimensions Symbols used in this Manual This symbol alerts you to the risk of electric shock. This symbol alerts you to hazards that may cause harm to the air conditioner. This symbol indicates special notes. NOTICE Indoor Unit Installation plate MODEL 14K Btu Series Unit... -
Page 9: Outdoor Unit
Dimensions Outdoor Unit Gas side (3-way valve) Liquid side (2-way valve) MODEL 14K Btu Series unit Service Manual 9... -
Page 10: Product Specifications
Product Specifications Product Specifications Table-1 Model Name LA140CE Item Unit 14000 Cooling Capacity Btu/h Heating Capacity Moisture Removal 1Ø, 115V, 60Hz Power Source Ø, V, Hz Indoor Air Circulation /min Outdoor Indoor Noise Level dB (A)±3 Outdoor 1400 Cooling Input... -
Page 11: Installation
Installation Installation Select the best Location Indoor unit 1. Do not have any heat or steam near the unit. More than 2. Select a place where there are no obstacles in front of the unit. 5cm(1.96") More than 10cm(3.9") 3. Make sure that condensation drainage can be conveniently rout- ed away. -
Page 12: Fixing Installation Plate
Installation Fixing Installation Plate The wall you select should be strong and solid Installation Plate enough to prevent vibration 1. Mount the installation plate on the wall with type "A" screws. If mounting the unit on a concrete wall, use anchor bolts. •... -
Page 13: Flaring Work
Installation Flaring Work Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure. Cutting the pipes and the cable. 1. Use the piping kit accessory or the pipes purchased Copper locally. -
Page 14: Connecting The Piping
Installation Check Smooth all round 1. Compare the flared work with the figure by. Inside is shiny without scratches 2. If a flared section is defective, cut it off and do flaring = Improper flaring = work again. Inclined Surface Cracked Uneven damaged thickness... - Page 15 Installation 4. Indoor unit installation Hook the indoor unit onto the upper portion of the installation plate.(Engage the two hooks of the rear Connecting cable top of the indoor unit with the upper edge of the installation plate.) Ensure that the hooks are properly seated on the installation plate by moving it left and Drain hose right.
- Page 16 Installation For left rear piping 1. Route the indoor tubing and the drain hose to the required piping hole position. 2. Insert the piping, drain hose, and the connecting Connecting cable cable into the piping hole. 3. Insert the connecting cable into the indoor unit. Drain pipe •...
- Page 17 Installation Wrap the insulation material around the connecting Plastic bands Insulation material portion. 1. Overlap the connection pipe heat insulation and the indoor unit pipe heat insulation material. Bind them together with vinyl tape so that there may be no gap. 2.
-
Page 18: Good Case
Installation CAUTION: Installation Information For left piping. Follow the instruction below. Good case • Press on the upper side of clamp and unfold the tub- ing to downward slowly. Bad case • Following bending type from right to left may cause damage to the tubing. -
Page 19: Connecting The Cables
Installation Connecting the Cables 1. Remove the cover control from the unit by loosening Wiring Diagram the 3 screws. Connecting cable(Low voltage) b 2. Dismount caps on the conduit panel. Indoor Unit Outdoor Unit Terminal Terminal 3. Temporarily mount the conduit tubes on the conduit (4P) (6P) panel. -
Page 20: Connection Method Of The Connecting Cable(Example)
Installation Connection method of the connecting cable(Example) 1. Dismount two-caps on the conduit panel. 2. Make a hole appropriate for the passage of connection cable through on cap by tool. (for low voltage line) 3. Pass the connecting cable through the hole. 4. -
Page 21: Connect The Cable To The Indoor Unit
Installation CAUTION: Provide a circuit breaker between power source and the unit as shown below. Main power source Circuit Breaker Conditioner Use a circuit breaker or time delay fuse. Connect the cable to the indoor unit 1. Connect the wires to the terminals on the control board individually according to the outdoor unit con- nection. -
Page 22: Checking The Drainage
Installation Checking the Drainage To check the drainage. 1. Pour a glass of water on the evaporator. Connecting area drain hose 2. Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit. -
Page 23: Forming The Piping
Installation Forming the Piping Form the piping by wrapping the connect- Seal small openings ing portion of the indoor unit with insula- around pipings with a tion material and secure it with two kinds gum type sealer. of vinyl tapes. Taping •... -
Page 24: Air Purging
Installation Air Purging Air purging The air and moisture remaining in the refrigerant system have undesirable effects as indicated below. 1. Pressure in the system rises. 2. Operating current rises. 3. Cooling(or heating) efficiency drops. 4. Moisture in the refrigerant circuit may freeze and block capillary tubing. 5. -
Page 25: Finishing The Job
Installation Soap water method 1. Remove the caps from the 2-way and 3-way valves. Liquid side 2. Remove the service-port cap from the 3-way valve. 3. To open the 2-way valve turn the valve stem counterclock- wise approximately 90°, wait for about 2~3 sec, and close it. 4. -
Page 26: Test Running
Installation Test Running 1. Check that all tubing and wiring are properly connected. 2. Check that the gas and liquid side service valves are fully open. Prepare remote controller 1. Remove the battery cover by pulling it according to the arrow direction. 2. -
Page 27: Pump Down
Installation If the actual pressure is higher than shown, the system is most likely over-charged, and charge should be NOTICE removed. If the actual pressure are lower than shown, the system is most likely undercharged, and charge should be added. PUMP DOWN This is performed when the unit is relocated or the refrigerant circuit is serviced. -
Page 28: Operation
Operation Operation Function of Controls DISPLAY 1) C/O Model (high quality LCD remote controller supplied) Operation Indicator • On while in appliance operation, off while in appliance pause Timer Indicator • On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled. Comp. -
Page 29: Defrost Control
Operation I Healthy Dehumidification Mode • When the dehumidification operation input by the remote controller is received, the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature. 26°C ≤ Intake Air Temp =>... - Page 30 Operation 26°C ≤ Intake Air Temp => 25°C 24°C ≤ Intake Air Temp<26°C => Intake Air Temp+1°C 22°C ≤ Intake Air Temp<24°C => Intake Air Temp+0.5°C 18°C ≤ Intake Air Temp<22°C => Intake Air Temp Intake Air Temp<18°C => 18°C •...
- Page 31 Operation • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. 26°C ≤ Intake Air Temp => 25°C 24°C ≤ Intake Air Temp<26°C => Intake Air Temp+1°C 22°C ≤...
-
Page 32: Sleep Timer Operation
Operation I Off-Timer <=> On-Timer Operation • When the set time is reached after the on/off time is input by the remote controller, the on/off-timer operation is carried out according to the set time. I Sleep Timer Operation • When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote controller while in appliance operation, the operation of the appliance stops. -
Page 33: Forced Operation
Operation - Operation Mode/Setting Temp/Selected Airflow Speed - Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour) I Forced Operation • Operation procedures when the remote control can't be used. • The operation will be started if the power button is pressed. •... -
Page 34: Display Function
Operation Display Function 1. Heating Model 2. Cooling Model Operation Indicator Operation Indicator • Cooling, Soft Dry, Fan, Heating • Cooling, Soft Dry, Fan Sleep Timer Indicator Sleep Timer Indicator • Sleep Mode • Sleep Mode Timer Indicator Timer Indicator •... -
Page 35: Remote Control Operations
Operation Remote Control Operations The controls will look like the following. 1. START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again. Controls 2. OPERATION MODE SELECTION BUTTON Signal transmitter Used to select the operation mode. 3. -
Page 36: Disassembly
Disassembly Disassembly Indoor Unit WARNING: Disconnect the unit from power supply before making any checks. Be sure the power switch is set to "OFF" To remove the Grille from the Chassis. • Hold up Inlet Grille Horizentally. • To remove the Grille, pull the lower left and right side of the grille toward you (slightly tilted) and lift it straight upward. - Page 37 Disassembly 2. To remove the Control Box. • Remove securing screws. • Pull the control box out from the chassis careful- 3. To remove the Discharge Grille. • Unhook the discharge grille and pull the dis- charge grille out from the chassis carefully. 4.
- Page 38 Disassembly • Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporator toward you until the tab is clear of the slot. 5. To remove the Motor Cover • Remove 2 securing screw. •...
-
Page 39: Schematic Diagram
Schematic Diagram Schematic Diagram Electric Control Device 1. Indoor Unit BZ FREQ Service Manual 39... - Page 40 Schematic Diagram 2. Outdoor Unit 40 Room Air Conditioner...
-
Page 41: Wiring Diagram
Schematic Diagram Wiring Diagram Indoor Unit Outdoor Unit Service Manual 41... -
Page 42: Components Location
Schematic Diagram Components Location MAIN P.W.B ASSEMBLY (Indoor) • PWB ASSY SVC PART LIST OPTIONAL FUNCTION MODEL P/No. OR1H OR2H OR3H OR4H OR5H OR6H 14K Cooling Model 6871A20535A 5.1K 200K OPEN OPEN OPEN OJ1H, OJ2H: OPEN 42 Room Air Conditioner... - Page 43 MAIN P.W.B ASSEMBLY (Outdoor) • PWB ASSY SVC PART LIST OPTIONAL FUNCTION MODEL P/No. OR4H OR5H OR6H OR7H OR 8H FUSE RY-FAN CN-TH HEATER 4WAY 4WAY 125V 14K Cooling Model 6871A10036N 3.15A Service Manual 43...
- Page 44 Schematic Diagram DISPLAY ASSEMBLY – 6871A20462 TOP VIEW BOTTOM VIEW SUB P.W.B ASSEMBLY 44 Room Air Conditioner...
- Page 45 Schematic Diagram • VOLTAGE OF CONNECTORS ACCORDING TO INDOOR FAN SPEED Input Power INDOOR POWER TRANS MOTOR INDOOR PWB ASSY CN-DC/DC 2 3 4 5 6 CN-POWER CN-TRANS 1 2 3 4 BL BK BR RD Connecting wires between Indoor and Outdoor Indoor Outdoor...
-
Page 46: Troubleshooting Guide
Troubleshooting Guide Troubleshooting Guide Refrigeration Cycle Diagram (1) Cooling Only Models INDOOR UNIT OUTDOOR UNIT LIQUID SIDE CAPILLARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE COMPRESSOR (2) Cooling & Heating Models INDOOR UNIT OUTDOOR UNIT CHECK VALVE LIQUID SIDE (Heating Model only) 3-WAY VALVE CAPILLARY TUBE... -
Page 47: 2-Way, 3-Way Valve
Troubleshooting Guide 2-way, 3-way Valve 2-way Valve (Liquid Side) 3-way Valve (Gas Side) Valve cap Hexagonal wrench (4mm) Open position Flare nut Flare nut Closed position Open position Closed position piping piping Service Service connection connection port cap port To outdoor unit To outdoor unit Works Shaft position... -
Page 48: Pumping Down
Troubleshooting Guide Pumping Down Liquid side Indoor unit Outdoor unit Open 2-Way valve Gas side Closed 3-Way valve CLOSE CLOSE Purge the air • Procedure (6) Operate the air conditioner at the cooling (1) Confirm that both the 2-way and 3-way valves cycle and stop it when the gauge indicates are set to the open position. - Page 49 Troubleshooting Guide Balance Refrigerant of the 3-way Valve (Gas leakage) Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open OPEN CLOSE • Procedure (1) Confirm that both the 2-way and 3-way valves (3) Open the valve (Lo side) on the charge set and are set to the back seat.
- Page 50 Troubleshooting Guide Evacuation (All amount of refrigerant leaked) Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open Vacuum pump OPEN CLOSE • Procedure (1) Connect the vacuum pump to the center hose (3) Close the valve (Lo side) on the charge set, of charge set center hose turn off the vacuum pump, and confirm that the gauge needle does not move (approxima-...
-
Page 51: Gas Charging
Troubleshooting Guide Gas Charging (After Evacuation) Liquid side Indoor unit Open Outdoor unit 3-Way valve Gas side Open 3-Way valve Check valve Charging cylinder OPEN CLOSE • Procedure (1) Connect the charge hose to the charging This is different from previous procedures. cylinder. -
Page 52: Cycle Parts
Troubleshooting Guide Cycle Parts Trouble analysis 1. Check temperature difference between intake and discharge air and operating current. Temp. difference : approx. 0°C • All amount of refrigerant leaked Current : less than 80% of out. Check refrigeration cycle. rated current Temp. -
Page 53: Electronic Parts
Troubleshooting Guide Electronic Parts Product does not operate at all. (* Refer to Electronic Control Device drawing and Schematic diagram.) Turn off Main Power (After 10 seconds) Turn on Main Power Does "beeping" sound is made from the Indoor Unit? Primarily, the operating condition of Micom is OK. - Page 54 Troubleshooting Guide The product does not operate with the remote controller. Turn on Main Power While the compressor has been stopped, the compressor does not operate owing to the delaying function for 3 minutes after stopped. When the compressor stopped Indoor Fan is driven by a low speed. At this point the wind speed is not controlled by the remote controller.
-
Page 55: Compressor/Outdoor Fan Are Unable To Drive
Troubleshooting Guide Compressor/Outdoor Fan are unable to drive. Turn on Main Power Operate "Cooling Mode( )" by setting the desired temperature of the remote controller is less than one of the indoor temperature by 2°F at least. When in Fan Mode, Compressor/Outdoor Fan is stopped. Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger(EVA). -
Page 56: When Indoor Fan Does Not Operate
Troubleshooting Guide When Indoor Fan does not operate. Does the voltage of each terminals of CN-MOTOR CONNECTOR in Indoor unit corresponds to values in the Table of page 51? Does the voltage of terminal of CN-DC/DC CONNECTOR in Check connecting condition of the CN-MOTOR CON- Indoor unit corresponds to the values in the table of page 51? NECTOR Do the voltage of terminal of... - Page 57 Troubleshooting Guide When Left/Right Louvers do not operate. • Confirm that the Left/Right Vertical Louver is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when rotating the Left/Right Vertical Louver with hands Normal •...
- Page 58 Troubleshooting Guide When Inlet Grille does not operate. • Confirm that the Inlet Grille is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when moving the Inlet Grille with hands Normal • Check the connecting condition of CN-SUB Connector •...
-
Page 59: When A Comunication Error Occurs
Troubleshooting Guide When a comunication error occurs. • The operation indicator of Indoor unit blinks five times. • The red indicator of Outdoor unit blinks five times. Check the connecting wires between Indoor and Outdoor unit for the connecting error and the contacting condition. Check the installation condition of outdoor unit. - Page 60 Troubleshooting Guide The phenomena in case of connecting error INDOOR UNIT Connector Type Phenomena Condition CN-DC/DC Open and connecting error • The same as the phenomenon of Outdoor Unit. Blue Black Brown • The indoor fan does not operate. CN-MOTOR Open •...
- Page 61 Troubleshooting Guide Outdoor Unit Phenomena Connector Type Condition • All functions stop. • The operation with the remote controller, forced and OPEN test one do not operate. CN-POWER Connecting reversely • PWB pattern is damaged when applying the power. • All functions stop or the compressor does not operate. OPEN •...
-
Page 62: Exploded View & Replacement Parts List
Exploded View & Replacement Parts List Exploded View & Replacement Parts List Indoor Unit 135312 146811 152302 668713 146811 145200 668713 268712 135080 733010 267110 359011 342800 354212 131410 352150 346810 249951 35211B 146811 159901 135311 135516 62 Room Air Conditioner... - Page 63 Exploded View & Replacement Parts List Parts List(Indoor) PART No. LOCATION DESCRIPTION REMARKS LA140CE 131410 CHASSIS ASSEMBLY 3141A20007B 135080 DECORATION (TOP) 3508A20034A 135080 DECORATION (BOTTOM) 3508A20034B 135311 GRILLE ASSEMBLY, DISCHARGE 3531A10137E 135314 GRILLE ASSEMBLY, INLET MIRROR 3531A20118E BLUE 3531A20138X WHITE...
-
Page 64: Outdoor Unit
Exploded View & Replacement Parts List Outdoor unit 437210 435301 437212 554031 435511 546810 552102-2 559010 649950 552201 552111 552102-1 552116 W0CZZ 552202 567502 561410 554160 447910 550140 552203-1 430410 552203-2 64 Room Air Conditioner... - Page 65 Exploded View & Replacement Parts List Parts List(Outdoor) PART No. LOCATION DESCRIPTION REMARKS LA140CE 430410 BASE ASSEMBLY, OUTDOOR 3041A20008J 435511 COVER ASSEMBLY, CONTROL 3551AR7184R 437210 PANEL ASSEMBLY, FRONT 3721A20027B 437212 PANEL ASSEMBLY REAR 3721A20026A 447910 BARRIER ASSEMBLY, OUTDOOR 4791A30002A 546810...
- Page 66 March, 2004 P/No.: 3828A20195N Printed in Korea...