Table of Contents
Related Manuals for LG LS-H186TNA2
Summary of Contents for LG LS-H186TNA2
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Page 1: Room Air Conditioner
Room Air Conditioner SERVICE MANUAL MODELS: LS-H186TNA2 LS-H186TGD3 LS-H246TNB0 LS-C246TLB3 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..............................8 Outdoor Unit...............................9 Product Specifications ..........................12 Installation ..............................13 Selection of the Best Location........................13 Piping Length and Elevation........................13 How to Fix Installation Plate ........................14 Drill a Hole in the Wall ..........................14... -
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 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 For installation, always con- Do not install the product on a Be sure the installation area tact the dealer or an defective installation stand. does not deteriorate with age. Authorized Service Center. • There is risk of fire, electric shock, •...
- Page 6 Safety Precautions Do not place a heater or other Do not allow water to run into Do not store of use flammable appliances near the power electric part. gas or combustibles near the cable. air conditioner. • There is risk of fire, failure of the •...
- Page 7 Safety Precautions I Operation Use two or more people to lift Use a soft cloth to clean. Do Do not touch the metal parts of and transport the air condi- not use harsh detergents, sol- the product when removing the tioner vents, etc.
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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 could cause harm to the air conditioner. NOTICE This symbol indicates special notes. Indoor Unit Installation plate Model ALL MODELS Dimension... -
Page 9: Outdoor Unit
Dimensions Outdoor Unit Liquid side 2-way valve Gas side 3-way valve MODEL LS-H186TNA2 unit 543.6 11.4 72.5 86.4 Service Manual 9... - Page 10 Dimensions Outdoor Unit Gas side Liquid side MODEL LS-C246TLB3/LS-H246TNB0 610.4 206.6 74.5 639.4 145.6 10 Room Air Conditioner...
- Page 11 Dimensions Outdoor Unit Liquid side 2-way valve Gas side 3-way valve MODEL LS-H186TGD3 unit 74.5 Service Manual 11...
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Page 12: Product Specifications
Product Specifications Product Specifications Model Name LS-H186TNA2 LS-H186TGD3 LS-H246TNB0 LS-C246TLB3 Item Unit Cooling Capacity 18000 18000 24000 24000 Btu/h Heating Capacity 18000 19000 Moisture Removal 2.88 2.88 Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz... -
Page 13: Installation
Installation Installation Selection of the Best Location Indoor unit More than 60cm • Do not have any heat or steam near the unit. • Select a place where there are no obstacles in More than 10cm More than 10cm front of the unit. •... -
Page 14: How To Fix Installation Plate
Installation How to Fix Installation Plate Drill a Hole in the Wall The wall you select should be strong and solid • Drill the piping hole with a ø70mm hole core drill. enough to prevent vibration Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side. -
Page 15: Flaring Work
Installation Flaring Work Main cause for refrigerant leakage is due to defect in Flaring work the flaring work. Carry out correct flaring work using the • Firmly hold copper pipe in a die in the dimension following procedure. shown in the table above. Cut the pipes and the cable. -
Page 16: Connection Of Piping Indoor
Installation Connection of Piping Indoor • Preparing the indoor unit's piping and drain hose 3. Tape the tubing, drain hose, and the connecting for installation through the wall. cable. Be sure that the drain hose is located at the lowest side of the bundle. Locating at the •... - Page 17 Installation • Tighten the flare nut with a wrench. • Wrap the area which accommodates the rear pip- ing housing section with vinyl tape. Open-end wrench (fixed) Indoor Connection unit pipe pipe Flare nut Vinyl tape Wrap with vinyl tape (wide) Wrench Connection pipe...
- Page 18 Installation 3. Insert the connecting cable into the indoor unit. Outside diameter Torque kg . m • Don't connect the cable to the indoor unit. inch Ø6.35 • Make a small loop with the cable for easy connec- tion later. Ø9.52 Ø12.7 Ø15.88...
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Page 19: Connection Of The Pipes-Outdoor
Installation • Bundle the piping and drain hose together by Press the lower left and right sides of the unit against the wrapping them with cloth tape over the range with- installation plate until the hooks engage into their in which they fit into the rear piping housing sec- slots(clicking sound). -
Page 20: Connect The Cable To The Indoor Unit
Installation Connect the Cable to the Indoor Unit. • Connect the cable to the indoor unit by connecting the wires to the terminals on the control board in dividually according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the terminal No. -
Page 21: Connect The Cable To The Outdoor Unit
Installation Connect the Cable to the Outdoor Unit Outdoor Unit Terminal block 1. Remove the control cover from the unit by loos- ening the screw. Over 5mm Connect the wires to the terminals on the control board individually. Connecting cable 2. -
Page 22: Checking The Drainage
Installation Checking the Drainage Form the Piping 1. To remove the front panel from the indoor unit. 1. Form the piping by wrapping the connecting portion of the indoor unit with insulation materi- • Set the air direction louvers up-and-down to the al and secure it with two kinds of vinyl tapes. -
Page 23: Air Purging
Installation Air Purging Air and moisture remaining in the refrigerant system • Do a leak test of all joints of the tubing(both indoor have undesirable effects as indicated below. and outdoor) and both gas and liquid side service valves. • Pressure in the system rises. Bubbles indicate a leak. - Page 24 Installation Soap water method Gas side (1) Remove the caps from the 2-way and 3-way valves. (2) Remove the service-port cap from the 3-way valve. (3) To open the 2-way valve turn the valve stem coun- Liquid side terclockwise approximately 90°, wait for about 2~3 3-way valve sec, and close it.
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Page 25: Test Running
Installation Test Running 1. Check that all tubing and wiring have been properly Intake temperature connected. Discharge air 2. Check that the gas and liquid side service valves are fully open. Prepare remote control 1. Remove the battery cover Discharge by pulling it according to the temperature arrow direction. -
Page 26: Main Unit Function
Operation Operation Main Unit Function DISPLAY 1) C/O Model Operation Indicator • ON while in appliance operation, OFF while in appliance pause. • Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on) Sleep Timer Indicator •... -
Page 27: Heating Mode Operation
Operation I Healthy Dehumidification Mode • When the dehumidification operation input by the remote control 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 28 Operation I Fuzzy Operation (C/O Model) • According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on. ➲...
- Page 29 Operation 2) Fuzzy Operation for Dehumidification • According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.
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Page 30: Sleep Timer Operation
Operation I Off-Timer Operation • When the set time is reached after the time is input by the remote control, the appliance stops operating. • The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached. •... -
Page 31: Forced Operation
Operation I Jet Cool Mode Operation (C/O Model) • If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates. • In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation. •... - Page 32 Operation I Remote Control Operation Mode • When the remote control is selected by the slide switch on the main unit, the appliance operates according to the input by the remote control. I Protection of the evaporator pipe from frosting •...
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Page 33: 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 34: Remote Control Operations
Operation Remote Control Operations Name and Function-Remote Control The remote control transmits the signals to the system. START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again. Remote Control OPERATION MODE SELECTION BUTTON Used to select the operation mode. - Page 35 Operation Name and Function-Remote Control The remote control transmits the signals to the system. START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again. Remote Control OPERATION MODE SELECTION BUTTON Used to select the operation mode. Signal transmitter ROOM TEMPERATURE SETTING BUTTONS Used to select the room temperature.
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Page 36: Disassembly
Disassembly Disassembly Indoor Unit Disconnect the unit from power supply before mak- ing any checks. Be sure the power switch is set to “OFF”. To remove the Grille from the Chassis. • Set the up-and-down air discharge louver to open position (horizontally) by finger pressure. - Page 37 Disassembly 2. To remove the Control Box. • Remove securing screws. • Pull the control box out from the chassis carefully. Caution label 3. To remove the Discharge Grille. • Unhook the discharge grille and pull the discharge 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. •...
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Page 39: Schematic Diagram
Schematic Diagram Schematic Diagram Electric Control Device Service Manual 39... -
Page 40: Cooling Model
Schematic Diagram Cooling Model LED TYPE 40 Room Air Conditioner... - Page 41 Schematic Diagram HVB TYPE(PLASMA) Service Manual 41...
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Page 42: Heat Pump Model
Schematic Diagram Heat Pump Model LED TYPE 42 Room Air Conditioner... - Page 43 Schematic Diagram HVB TYPE Service Manual 43...
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Page 44: Wiring Diagram
Schematic Diagram Wiring Diagram Indoor Unit (Heat pump only) Indoor Unit (Cooling only) LS-H186TNA2/LS-H186TGD3/LS-H246TNB0 LS-C246TLB3 AC PWB ASM. DC PWB ASM. TRIAC AC PWB ASM. DC PWB ASM. THERMISTOR GN/YL MOTOR TRIAC THERMISTOR STEP GN/YL MOTOR MOTOR CN-MOTOR STEP MOTOR... -
Page 45: Components Location
Schematic Diagram Components Location MAIN P.W.B ASSEMBLY (AC PART) • COOLING MODEL • HEAT PUMP MODEL MAIN P.W.B ASSEMBLY (DC PART) • TOP VIEW • BOTTOM VIEW Service Manual 45... - Page 46 Schematic Diagram DISPLAY ASSEMBLY – 6871A20390 • TOP VIEW • BOTTOM VIEW – 6871A20227 • TOP VIEW • BOTTOM VIEW 46 Room Air Conditioner...
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Page 47: 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 48: 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 49 Troubleshooting Guide Air purging Required tools : hexagonal wrench, adjustable wrench, The air in the indoor unit and in the piping must be torque wrenches, wrench to hold the purged. If air remains in the refrigeration pipes, it will joints, and gas leak detector. affect the compressor, reduce to cooling capacity, and could lead to a malfunction.
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Page 50: 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 51 Troubleshooting Guide Re-air Purging (Re-installation) Liquid side Indoor unit Closed Outdoor unit 3-Way valve Gas side Closed 3-Way valve Gas cylinder OPEN CLOSE • Procedure (6) Disconnect the charge set and the gas cylin- (1) Confirm that both the liquid side valve and the der, and set the Liquid side and Gas side gas side valve are set to the closed position.
- Page 52 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 53 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-...
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Page 54: 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 55: 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 56: 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 57 Troubleshooting Guide The product is 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 58 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 1°C at least. When in Air Circulation 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).
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Page 59: When Indoor Fan Does Not Operate
Troubleshooting Guide When indoor Fan does not operate. Turn off Main power Check the connection of CN-MOTOR Check the Fan Motor Check the Fuse(AC250V/T2A) Check the related circuit of indoor Fan Motor. • The pin NO 63 of Micom, and the part for driving TRIAC(the input and output signal of IC01M, PIN NO 7, 10) •... - Page 60 Troubleshooting Guide When Vertical Louver does not operate. • Confirm that the Vertical Louver is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when rotating the Vertical Louver with hands Normal • Check the connecting condition of CN-U/D Connector •...
- Page 61 Troubleshooting Guide When Heating does not operate Turn ON Main Power Operate “Heating Mode( )” by setting the desired temperature of the remote control is higher than one of the indoor temperature by 2°C at least. In heating Mode, the indoor fan operates in case the pipe temperature is higher than 28°C.
- Page 62 Troubleshooting Guide Turn off Main Power • Check the electrical wiring diagram of outdoor side. • Check the abnormal condition for the component of Compressor/Outdoor Fan Motor, 4 way. • Check the "open" or "short" of connecting wires between indoor and outdoor.
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Page 63: Exploded View
Exploded View Exploded View Indoor Unit 135312 267110-1 152313 135314 267110-1 152302 135511 733010 131410 359011 342800 159830 135311 159901-1 159901-2 668713 268712 354212 249951 35211B 346810 135516 268714-2 352150 146811-1 146811-2 264110 268714-1 266090 W6640 263230 Service Manual 63... - Page 64 Exploded View Outdoor Unit (LS-H186TNA2 / LS-H186TGD3) 554032 437212 552102-2 435512 552201 552111 552102-1 649950 W0CZZ-1 435511 559010 W0CZZ-2 668713 546810 552202 552116 553000 567502 447910 435301 554160 552203-2 550140 430410 552203-1 437210 64 Room Air Conditioner...
- Page 65 Exploded View Outdoor Unit (LS-C246TLB3/LS-H246TNB0) 554032 437212 552102 649950 W0CZZ-1 435511 559010 437210 W0CZZ-2 668713 546810 552202 552116 553000 567502 447910 554160 552203-2 550140 435301 430410 552203-1 Service Manual 65...
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Page 66: Replacement Parts List
Replacement Parts List Replacement Parts List Indoor Unit PART NO. LOCATION DESCRIPTION REMARKS LS-H186TNA2 LS-H186TGD3 LS-H246TNB0 LS-C246TLB3 131410 CHASSIS ASSEMBLY 3141A10002A 3141A10002A 3141A10002A 3141A10002A 135311 GRILLE ASSEMBLY, DISCHARGE(INDOOR) 3531A10231H 3531A10116C 3531A10231G 3531A10231G 135312 GRILLE ASSEMBLY, FRONT(INDOOR) 3531A20180G 3531A21022J 3531A20180G 3531A20108R... - Page 67 Replacement Parts List Outdoor Unit PART NO. LOCATION DESCRIPTION REMARKS LS-H186TNA2 LS-H186TGD3 LS-H246TNB0 LS-C246TLB3 430410 BASE ASSEMBLY, WELD[OUTDOOR] 3041A10054B 3041A20022G 3041A10027A 3041A10027A 435511 COVER ASSEMBLY, CONTROL(OUTDOOR) 3551A20030D 3551A30007X 3551A30079K 3551A30129G 437210 PANEL ASSEMBLY, FRONT(OUTDOOR) 2H02674V 3721A20005H 3721A20113A 3721A20113A 437212 PANEL ASSEMBLY, REAR...
- Page 68 September, 2004 P/No.: 3828A20173N Printed in Korea...