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Summary of Contents for LG LS-H126RLN1
- Page 1 LG Room Air Conditioner SERVICE MANUAL MODELS: LS-H126RLN1 LS-H096QLN1 LS-H076QLN0 CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
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Page 2: Table Of Contents
Air Conditioner Service Manual TABLE OF CONTENTS LG Model Name ...............................3 Safety Precautions............................5 Dimensions ..............................10 Symbols Used in this Manual ........................10 Indoor Unit..............................10 Outdoor Unit.............................11 Product Specifications ..........................13 Installation ..............................14 Select the Best Location .........................14 Piping Length and Elevation........................14 How to Fix Installation Plate ........................15 Drill a Hole in the Wall ..........................15... -
Page 3: Lg Model Name
LG Model Name 2002 Code Type Code of Model Meaning Type of Airconditioner LS: LG Split Type Airconditioner Chassis Name of toll of Unit Ex. LS-R ➔ S R Chassis Capacity(Btu/h) Cooling/Heating Capacity Ex. "09" ➔ 9,000Btu/h Electric Range Electric Standard 1 ➔... - Page 4 Nano Plasma F+(A/changeove)+A/clean+4way Nano Plasma F+(A/changeove)+A/clean+PTC Nano Plasma F+(A/changeove)+Autoclean+4way+PTC Nano Plasma F+(A/changeove)+A/clean+4way+Low A+PTC Negative ION+A/Clean (Nano)Plasma+Negative ION+A/Clean 4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean Nano Plasma F+4Way+(A/changeove)+A/clean+ Serial No. LG Model De velopment Serial No. * ARTCOOL COLOR Mirror White Blue Wood Metal Cherry...
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Page 5: 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 6 Safety Precautions For re-installation of the installed product, Do not install, remove, or re-install the unit by always contact a dealer or an authorized ser- yourself. vice center. • There is risk of fire, electric shock, explosion, or • There is risk of fire, electric shock, explosion, or injury.
- Page 7 Safety Precautions I Operation Do not turn the air-conditioner ON or OFF by Use a dedicated outlet for this appliance. plugging or unplugging the power plug. • There is risk of fire or electrical shock. • There is risk of fire or electrical shock. Grasp the plug to remove the cord from the Do not place a heater or other appliances near outlet.
- Page 8 Unplug the unit if strange sounds, odors, or Be cautious that water could not enter the smoke comes from it. product. • There is risk of electric shock or fire. • There is risk of fire, electric shock, or product dam- age.
- Page 9 I Operation Use a soft cloth to clean. Do not use harsh Do not touch the metal parts of the product detergents, solvents, etc. when removing the air filter. They are very sharp! • There is risk of fire, electric shock, or damage to the •...
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Page 10: 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. This symbol indicates special notes. NOTICE Indoor Unit Installation plate Model 7, 9k Btu Series 12k Btu Series... -
Page 11: Outdoor Unit
Dimensions Outdoor Unit Gas side (3-way valve) Liquid side (2-way valve) MODEL 7k Btu Series unit Service Manual 11... - Page 12 Dimensions Gas side (3-way valve) Liquid side (2-way valve) MODEL 9k, 12k Btu Series unit 12 Room Air Conditioner...
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Page 13: Product Specifications
Product Specifications Product Specifications Table-1 Model Name LS-H076QLN0 LS-H096QLN0 LS-H126RLN1 Item Unit 7,000 9,000 12,000 Cooling Capacity Btu/h 7,300 9,300 13,000 Heating Capacity Moisture Removal 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz Power Source Ø, V, Hz Indoor... -
Page 14: 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 15: 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 16: 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 17: 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 18 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 19 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 20: 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 21: 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 22: 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 23: 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 24: 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 25 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 26: 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 27: 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 Sleep Timer Indicator • ON while in sleep timer mode, OFF when sleep timer cancel or appliance operation pause. Timer Indicator •... -
Page 28: Cooling Mode Operation
Operation I Cooling Mode Operation • When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan stop. • When it reaches 0.5°C above the setting temp, they start to operate again. Compressor ON Temp=> Setting Temp+0.5°C Compressor OFF Temp =>... - Page 29 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. Compressor ON Temp =>...
- Page 30 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 31: 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 32: Test Operation Control
Operation I Auto Restarting Operation • When the power is restored after a sudden power failure while in appliance operation, the mode before the power failure is kept on the memory and the appliance automatically operates in the mode on the memory. •... - Page 33 Operation I Buzzer Sounding Operation • When the appliance-operation key is input by the remote controller, the short “beep-beep-” sounds. • When the appliance-pause key is input by the remote controller, the long “beep—” sounds. I Air Cleaner Operation • When an air cleaner function is selected during Air Conditioner operation - Plasma air cleaner function will be operated while in any operation mode with selecting the function.
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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: Self-Diagnosis Function
Operation Self-diagnosis Function Error Error Display LED Error contents SVC check point Code (Indoor body operation LED) • Indoor room temperature (once) thermistor open/short • Indoor Thermistor • Indoor pipe temperature assembly check 3sec 3sec 3sec thermistor open/short. (twice) • Outdoor pipe temperature •... -
Page 36: Remote Control Operations
Operation Remote Control Operations The remote control transmits the signals to the system. 1. START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again. Remote Control 2. OPERATION MODE SELECTION BUTTON Used to select the operation mode. Signal transmitter 3. -
Page 37: 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. • Set the up-and-down air discharge louver to open position (horizontally) by finger pressure. - Page 38 Disassembly 2. To remove the Control Box. • Remove securing screws. Caution label • Pull the control box out from the chassis carefully. 3. To remove the Discharge Grille. • Unhook the discharge grille and pull the discharge grille out from the chassis carefully. 4.
- Page 39 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 40 Disassembly 7. To Remove the heater • After removing the evaporator, remove screws and terminals on the control box. CAUTION: • The high temperature on the heater's surface can make injury. • Be sure to check heater surface is not hot before disassembilng! 40 Room Air Conditioner...
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Page 41: Schematic Diagram
Schematic Diagram Schematic Diagram Electric Control Device • Heat Pump Model(LED TYPE) Service Manual 41... - Page 42 Schematic Diagram HVB TYPE(PLASMA) 42 Room Air Conditioner...
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Page 43: Wiring Diagram
RY-4WAY RY-FAN DISPLAY PWB ASM. BK(BR) TO OUTDOOR UNIT PTC CONTROL PWB ASSY HEATER P/No : 3854A20238X Outdoor Unit LS-H076QLN0 LS-H096QLN1 LS-H126RLN1 CAPACITOR COMP MOTOR COMP C S R CAPACITOR GN/YL BR RD BL RD BL YL BK(RD) MOTOR BK ( RD ) -
Page 44: Components Location
Schematic Diagram Components Location MAIN P.W.B ASSEMBLY (AC PART) • HEAT PUMP MODEL MAIN P.W.B ASSEMBLY (DC PART) • TOP VIEW • BOTTOM VIEW 44 Room Air Conditioner... - Page 45 Schematic Diagram DISPLAY ASSEMBLY – 6871A20227 TOP VIEW BOTTOM VIEW Service Manual 45...
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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: Pipe Length And The Elevation
Troubleshooting Guide Pipe Length and the Elevation Pipe Size Standard Max. Max. Additional Capacity Length Elevation Length Refrigerant (Btu/h) LIQUID B (m) A (m) (g/m) 3/8"(Ø9.52) 1/4"(Ø6.35) 4 or 7.5 7k~14k 1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5 1/2"(Ø12.7) 1/4"(Ø6.35) 4 or 7.5 18k~28k 5/8"(Ø15.88) 1/4"(Ø6.35) -
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 152313 135314 267110 152302 135511 131410 733010 668713 753010 342800 359011 159830 135311 354210 159901 668713 268712 249951 35211B 346810 135516 268714-2 352150 146811 264110 268714-1 266090 W0CZZ W6640 263230 Service Manual 63... -
Page 64: Outdoor Unit
Exploded View Outdoor Unit 437210 437212 554031 435301 435511 546810 552102 559010 649950 552201 552111 552116 W0CZZ 552202 567502 561410 554160 447910 550140 552203-1 430410 552203-2 64 Room Air Conditioner... -
Page 65: Replacement Parts List
Replacement Parts List Replacement Parts List Indoor Unit PART No. LOCATION DESCRIPTION REMARKS LS-H076QLN0 LS-H096QLN1 LS-H126RLN1 131410 CHASSIS ASSEMBLY 3141A20006A 3141A20006A 3141A20005L 135311 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A10127R 3531A10127R 3531A10234M 135312 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A20187K 3531A20187K 3531A10208R 135314 GRILLE ASSEMBLY,INLET SUB 3531A20100C 3531A20100C... -
Page 66: Outdoor
Replacement Parts List Outdoor Unit PART No. LOCATION DESCRIPTION REMARKS LS-H076QLN0 LS-H096QLN1 LS-H126RLN1 435301 GRILLE,DISCHARGE 3530A00008A 3530A10059D 3530A20006G 430410 BASE ASSY,WELD[OUTDOOR] 3041AR2415K 3041A20016A 3041A20008K 435511 COVER ASSEMBLY,CONTROL(OUTDOOR) 4994AR3492B 3551A30023Q 3551A30023D 437210 GRILLE ASSEMBLY,FRONT(OUTDOOR) 3531AR2512R 437212 PANEL ASSEMBLY,REAR(OUTDOOR) 3530AR0058C 3720A10172A 3721A20027L... - Page 67 June, 2004 P/No.: 3828A20400K Printed in Korea...
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