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LG
Room Air Conditioner
SERVICE MANUAL
MODELS: ASNW096F1G0
ASNW096FE/V/GG0
ASNW126F1G0
ASNW126FE/V/GG0
ASUW126FUGO
ASNW126F2G0(A12AW2-NF6)
ASUW126FUGO(A12AWU-UF6)
website http://www.lgservice.com
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
LG
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Table of Contents
Troubleshooting
Related Manuals for LG ASNW096F1G0
Summary of Contents for LG ASNW096F1G0
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Page 1: Room Air Conditioner
Room Air Conditioner SERVICE MANUAL MODELS: ASNW096F1G0 ASNW096FE/V/GG0 ASNW126F1G0 ASNW126FE/V/GG0 ASUW126FUGO ASNW126F2G0(A12AW2-NF6) ASUW126FUGO(A12AWU-UF6) 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 .............................10 Installation............................12 Flaring work and connection of piping..................15 Checking the drainage and forming the pipings .................18 Air purging ............................19 Test running ............................22 Functions............................23 Operation............................27 Disassembly............................40 Troubleshooting Guide ........................42 Schematic Diagram ........................62... -
Page 3: Lg Model Name
LG Model Name LG Model Name 2006 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... -
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 Be cautious when unpacking For installation, always con- Do not install the product on a and installing the product. tact the dealer or an defective installation stand. Authorized Service Center. • Sharp edges could cause injury. • There is risk of fire, electric •...
- Page 6 Safety Precautions Use a dedicated outlet for this Grasp the plug to remove the Do not place a heater or other appliance. cord from the outlet. Do not appliances near the power touch it with wet hands. cable. • There is risk of fire or electrical •...
- Page 7 Safety Precautions Do not open the inlet grill of When the product is soaked Ventilate the product from the product during operation. (flooded or submerged), con- time to time when operating it (Do not touch the electrostatic tact an Authorized Service together with a stove, etc.
- Page 8 Safety Precautions Do not install the product Use two or more people to lift Do not install the product where the noise or hot air and transport the air condi- where it will be exposed to from the outdoor unit could tioner.
- Page 9 Safety Precautions Always insert the filter secure- Do not insert hands or other Do not drink the water drained ly. Clean the filter every two objects through the air inlet or from the unit. weeks or more often if neces- outlet while the air conditioner sary.
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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. NOTICE This symbol indicates special notes. Indoor Unit Hanger Hole Fix Hole Pipe Hole Model... -
Page 11: Outdoor Unit
Dimensions Outdoor Unit Gas side (3-way valve) Liquid side (2-way valve) MODEL OUTDOOR unit Service Manual 11... -
Page 12: Installation
Installation Installation Selection of the Best Location Indoor unit Rooftop Installations: • Do not have any heat or steam near the unit. • If the outdoor unit is installed on a roof structure, be sure to level the unit. Ensure the roof struc- •... -
Page 13: Preparing Work For Installation
Installation Preparing Work for Installation Open panel front 1. Pull the upper part of the front panel. 2. Lift up the panel. 3. To detach the front panel, remove the two screws at the lower part. 4. Detach the front panel from the body. 5. -
Page 14: Fixing Indoor Unit
Installation Fixing Indoor Unit 1. Attach an Installation guide map on the 2. Look at suited horizon by horizontal desired surface. meter on the horizontal setting line, and fix lightly the map by adhesive tape. INSTALLATION GUIDE MAP Horizontality T I O 3. -
Page 15: Flaring Work And Connection Of Piping
Flaring work and connection of piping Flaring work and connection of piping Flaring work • Carry out flaring work using flaring tool as shown below. Outside diameter Flaring work inch Main cause for refrigerant leakage is due to defect in the Ø6.35 0~0.5 flaring work. -
Page 16: Good Case
Flaring work and connection of piping Wrap the insulation material around the con- necting portion. •Overlap the connection pipe insulation material and the indoor unit pipe insulation material. Bind them together with vinyl tape so that there is no gap. Loop Plastic bands Insulation material Gas side piping... -
Page 17: Bad Case
Flaring work and connection of piping Bad case Outdoor unit • Following bending type from left to right may cause Gas side piping damage to the turbing. (Bigger diameter) Liquid side piping (Smaller diameter) Torque wrench Connection of the pipes-Outdoor Align the center of the pipings and sufficiently tighten the flare nut by hand. -
Page 18: Checking The Drainage And Forming The Pipings
Checking the drainage and forming the pipings Checking the drainage and forming the pipings Checking the drainage Form the piping To check the drainage. Form the piping by wrapping the connecting portion of the indoor unit with insulation mate- • Pour a glass of water on the evaporator. rial and secure it with two kinds of vinyl tapes. -
Page 19: Air Purging
Air purging Air Purging Air purging • Do a leak test of all joints of the tubing(both indoor and out- door) and both gas and liquid side service valves. Air and moisture remaining in the refrigerant system have Bubbles indicate a leak. Be sure to wipe off the soap with a undesirable effects as indicated below. -
Page 20: Finishing The Job
Air purging Soap water method Liquid 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 counter- clockwise approximately 90°, wait for about 2~3 sec, and Gas side close it. -
Page 21: Panel Front Assembly
Air purging Panel Front Assembly 1. First, Check the side cover assembly exactly, and fix the power cord in the bottom groove of cover side left. 2. Assemble connecting lead wire with controller, fix the upper part of panel front, and match the lower part of panel front. -
Page 22: Test Running
Test running Test Running 1. Check that all tubing and wiring have been properly Intake temperature Discharge air 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. -
Page 23: Functions
Functions Functions Indoor Unit Cooling Mode Operation Healty dehumidification Mode Operation Heating Mode Operation Jet Cool Mode Operation Jet Heat Mode Operation Energy Saving Cooling Mode Operation Operation ON/OFF by Remote controller Sensing the Room Temperature • Room temperature sensor. (Thermistor) •... - Page 24 Functions Sleep Mode Auto Control • The fan is switched to S-low(Cooling), low(Heating) speed. • The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours. Natural Air Control by CHAOS Logic • The fan is switched to intermittent or irregular operation •...
- Page 25 Functions Outdoor Unit Power Relay Control • If power is on, it will operate to chage capacitor on controller and power relay will operate after about 2~5sec. Active Power Filter Control(PSC) • The active power filter is designed to correct power factor(cos θ) and to regulate DC link voltage. •...
- Page 26 Functions Remote Control Operation ON/OFF Operation Mode Selection Cooling Operation Mode.( Auto Operation Mode.( (Cooling (Heating Healthy Dehumidification Operation Mode.( Heating Operation Mode.( model only) model only) Fan Speed Selection (Low) (Med) (High) (CHAOS) Room, Temperature Display : (High:39°C Low:11°C) Temperature Setting Down to 18°C Down to 16°C...
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Page 27: Operation
Operation Operation Function of Controls • 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) Timer Indicator •... -
Page 28: Cooling Mode Operation
Operation Cooling mode operation • Operating frequency of compressor depend on the difference of the temperature. (= intake air Temp.- Compressor off Temp. • Compressor off temp.= setting temp. -0.5°C on temp. = setting temp. +0.5°C • If compressor operates at some operating frequency, the operating frequency of compressor cannot be changed within 30 seconds. -
Page 29: Heating Mode Operation
Operation Heating mode operation • Operating frequency of compressor depend on the difference of the temperature ( = desired temp. – indoor temp. ) • Compressor off temp. = setting temp. + 4 °C on temp. = setting temp. + 2 °C •... -
Page 30: Swing Mode
Operation Jet heat mode operation • While in cooling mode or Fuzzy operation, the Jet Heat key cannot be input. When it is input while in the Heating mode operation (dehumidification), the Jet Heat mode is operated. • In the Jet Heat mode, the indoor fan is operated super-high speed for 60 min. at Heating mode operation. •... -
Page 31: Sleep Timer Operation
Operation Sleep timer operation • When the sleep time is reached after [1,2,3,4,5,6,7hr] is input by the remote control during the operation, the operation of the appliance stops. • When the appliance is on pause, the sleep timer mode cannot be input. 1. -
Page 32: Forced Operation
Operation Auto restarting operation • When the power is restarted 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: Power Relay Control
Operation Power relay control • Power relay turns on 1 second later after the power is input to the outdoor unit. ➔ ➔ • Control sequence : power on PTC operating power relay on Protection from total current control I CT1 control •... -
Page 34: Portection From Overheating Of Power Module
Operation Portection from overheating of power module • If the temperature of the heat sink TH. reaches over Toff, the Compressor stop instantly. • It will be limited the compressor operating frequency according to the heat sink TH.(refer to below FIG.) •... - Page 35 Operation Defrosting control • While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing, reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit. • Defrosting control is available 40 minutes later since heating cycle started and the difference of the pipe tem- perature of outdoor unit reaches above option 1.
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Page 36: Auto Cleaning
Operation Auto Cleaning • Function used to perform the Self Cleaning to prevent the Unit from Fungus and Bad Odors. • Used after the Shut Down of Cooling Operation to Clean the Evaporator and keep it as fresh for the Next operation. •... - Page 37 Operation Preheat • This is operation to preheat the compressor by conducting current through motor coils of the compressor for pre- venting phenomena that liquid refrigerants are income due to difference between temperature of the outside pipe and temperature of the compressor as outdoor temperature becomes low. •...
- Page 38 Operation 10sec Tact S/W Buzzer sound Operation LED Flickering 4 times 0.25sec (1time) When selecting additional heat Logic 1.5sec 1.5sec 1.5sec 0.25*3 sec (2times) When selecting existing heat Logic 1.5sec 1.5sec 1.5 sec Indoor fan lock detection (BLDC) • Function of operation off for preventing overload when the indoor fan stops in the operating condition of the outdoor unit.
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Page 39: Remote Control Operations
Operation Remote Control Operations The controls will look like the following. 1. START/STOP BUTTON Used to turn off/on the unit. 2. OPERATION MODE SELECTION BUTTON Signal transmitter Used to select the operation mode. 3. ROOM TEMPERATURE SETTING BUTTONS Used to select the room temperature. 4. -
Page 40: 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" 1. Open panel front • Pull the upper part of the front panel. • Lift up the panel. •... - Page 41 Disassembly 3. To remove the Evaporator. - Remove 4 screws securing the evaporator. - Pull the evaporator out from the chassis carefully. 4. Before removing the Turbo Fan. Air Guide - Remove the securing screws from the chassis. - Pull the drain pan, top cover and the air guide. Top Cover 5.
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Page 42: Troubleshooting Guide
Troubleshooting Guide Troubleshooting Guide Refrigeration Cycle Diagram (1) Model Capillary Tube INDOOR UNIT OUTDOOR UNIT LIQUID SIDE 3-WAY VALVE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE REVERSING 3-WAY VALVE ACCUMU VALVE LATOR COOLING COMPRESSOR HEATING (2) Model Adopted Electrion Expansion Valve INDOOR UNIT OUTDOOR UNIT LIQUID SIDE... - Page 43 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 44 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 45: Pumping Down
Troubleshooting Guide Pumping Down Liquid side Indoor unit Open Outdoor unit 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 46: Re-Air Purging
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 47 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 48 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 49: Gas Charging
Troubleshooting Guide Gas Charging (After Evacuation) Liquid side Indoor unit Outdoor unit Open 3-Way valve Gas side Open 3-Way valve Check valve Charging cylinder OPEN CLOSE • Procedure This is different from previous procedures. (1) Connect the charge hose to the charging Because you are charging with liquid refrigerant cylinder. -
Page 50: 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 51: Self Diagnosis Function
Troubleshooting Guide Self diagnosis Function Indoor Error Display Cause of Error Error Indicator Operation Code Indoor Outdoor 1 time 1time 1time 1time 1time • Indoor Temp. sensor error - Sensor open or short 3 sec 3 sec 3 sec 3 sec 2 times 2 times 2 times... - Page 52 Troubleshooting Guide 1. Error indicator of air conditioner 1) Indoor : Operating LED / Outdoor : LED01M(Red) on the outdoor PCB 2) 2 more errors occur at same time - Air conditioner Off condition : Display the error code of product off cause - Air conditioner On condition : Display the prior Error Code 2.
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Page 53: Electronic Parts
Troubleshooting Guide Electronic Parts ❇ Refer to electronic contorol device drawing & schematic diagram. The Product doesn’t operate at all. Trouble 1 Turn off the main power and wait to 10 seconds Turn on the main power again. Does "Beeping" sound is made from the indoor unit? •... - Page 54 Troubleshooting Guide Product doesn't operate with the remote controller. Trouble 2 Turn on main power. While the compressor has been stopped, the compressor does not operate owing to the delaying function for 2 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.
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Page 55: Troubleshooting For Error Code
Troubleshooting Guide Troubleshooting for error code Error code Description Cause of error • Indoor TH. (sensor) is short or open Indoor TH. is short or • Indoor TH. (sensor) is not connected to the indoor pcb assembly • Damage or defect on the sensing circuit of indoor pcb assembly. open (R01H, R02H, R03H, R04H, C01H, C02H) Check flow... - Page 56 Troubleshooting Guide • 9K / 12K Error code Description Cause of error • Heat-sink TH. is damaged(short or open). Heat-sink Temp. is over 95°C • Heat-sink Temp. is over 95°C Heat-sink TH. • Damage or defect on the sensing circuit of outdoor pcb assembly. is open or short (R01H, R02H, C01H) Check flow...
- Page 57 Troubleshooting Guide Error code Description Cause of error • Wrong or missing wiring between indoor and outdoor unit cable • Defect of communication components in indoor pcb assembly • Defect of communication components in outdoor pcb assembly Communication Error • Defect of power supply components in outdoor pcb assembly •...
- Page 58 Troubleshooting Guide Cause of error Error code Description Cause of error • Supplied power is not normal • Comp Connector (CN-U,V,W) is disconnected or inserted to wrong position DC Peak Error • Compressor is damaged (coil short) ➔ replace compressor •...
- Page 59 Troubleshooting Guide Error code Description Cause of error • Supplied power is not normal Over current Error • Indoor/outdoor fan is locked • Too much refrigerant (CT2) • Defect in current sensing circuit in outdoor pcb assembly Check flow Supplied voltage to Does indoor / outdoor fan work Outdoor pcb is about Refrigerant pressure is right ?
- Page 60 Troubleshooting Guide Error code Description Cause of error • Indoor fan is locked or separated Indoor fan is locked • Fan connector is not connected to indoor pcb assembly (BLDC fan model only) • Defective in DC-fan driving circuit Check flow Indoor fan is rotating ? (1) Indoor fan is rotating ? (2) DC–fan driving circuit is right ?
- Page 61 Troubleshooting Guide Error code Description Cause of error • D_pipe TH. is short or open D-Pipe TH. is short or • D_pipe TH. is not connected to the outdoor pcb assembly open • Damage or defect on the sensing circuit of outdoor pcb assembly Check flow D_PIPE TH.
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Page 62: Schematic Diagram
Schematic Diagram Schematic Diagram Wiring Diagram Indoor Unit Models: ASNW096F1E/V/GG0, ASNW126F1E/V/GG0, ASNW126F2G0(A12AW2-NF6) 62 Room Air Conditioner... - Page 63 Schematic Diagram Outdoor Unit Models: ASUW096FUG0, ASUW126FUG0, ASUW126FUG0(A12AWU-UF6) Service Manual 63...
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Page 64: Components Location
Schematic Diagram Components Location INDOOR MAIN P.W.B ASSEMBLY (AC PART) • TOP VIEW • BOTTOM VIEW 64 Room Air Conditioner... - Page 65 Schematic Diagram INDOOR MAIN P.W.B ASSEMBLY (DC PART) • TOP VIEW CN-L/R2(WH) CN_D2 CN-LEV CN-U/D(BL) CN-L/R1(WH) CN-HVB C03L BZ01E Q01C LED1 C02L TRANS01 Y U04Y U02Y U03Y EEPROM CN-ACDC2 IC01A C02A PCB ASM : 6871A20920 CN_COM • BOTTOM VIEW Service Manual 65...
- Page 66 Schematic Diagram DISPLAY ASSEMBLY • TOP VIEW PCB ASM:6871A20921 C01A VOUT PWB:6870A90729 A CN-DISP R01A PWB ASSEMBLY SUB • TOP VIEW CN-D4 PWB ASM:6871A20363 CN-D3 PWB:6870A90126B CN-D2 CN-D1 CN-CON(WH) CN-12V(WH) CN-D5 CN-SW(BL) CN-D7 CN-D6 CN-D8 66 Room Air Conditioner...
- Page 67 Schematic Diagram Outdoor Unit • TOP VIEW PCB : 6870A90055Q_1(050106) CN-PUMP CN-4WAY Assy : 6871A10135 CN-FAN1/PUMP 2005.01.06 C01M C03S C01S RY-PUMP RY-PWR C07J C05J C06J R01N R02S NF02J R02N C01N PSC_Module D02N C03F C02S D02K CN-D_PIPE CN-TH1 C19Z C08S R10K C08Z ZD01K ZD02K...
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Page 68: Product Specifications
Product Specifications Product Specifications Model Name AS-W126F1/E/V/GG0 AS-W096F1/E/V/GG0 AS-W126F2G0(A12AW) Item Unit 1,118 1,118 kcal/h.(W) 1,300 1,300 Btu/h. 4,436 4,436 2,321 3,009 Cooling Capacity Type kcal/h.(W) 2,700 3,500 Btu/h. 9,212 11,942 3,009 3,439 kcal/h.(W) 3,500 4,000 Btu/h. 11,942 13,648 1,118 1,118 kcal/h.(W) 1,300 1,300... -
Page 69: Exploded View
Exploded View Exploded View Indoor Unit 135316 268711-4 146811-2 152302 135080 145200-2 145200-1 268711 249951 135515 268711-2 264110 354210 268711-3 267110 131410 266090 567480 35211B 352150 135500-2 159830 330870 346810 349600 146811-1 147581 135500-1 352380 359012 Service Manual 69... - Page 70 Exploded View Outdoor Unit Model:ASUW096FUG0, ASUW126FUG0, ASUW126FUG0(A12AWU-UF6) 437211 263230-1 437212 554031 435301 435511-1 549610 546810 559010 435511-2 55211G 661400 649950 567480-2 447910 552202 561410 268711-2 552116 554160 261704 550140 552203-1 430410 552203-2 70 Room Air Conditioner...
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Page 71: Replacement Parts List
Replacement Parts List Replacement Parts List Indoor Unit PART No. LOCATION DESCRIPTION REMARKS ASNW096F(1/2/E/V/G)G0 ASNW126F(1/2/E/V/G)G0 131410 Chassis Assembly 3141A20037C 3141A20037C 146811-1 Motor Assembly,DC,Stepping 4681A20055A 4681A20055A LOUVER 147581 Louver,Horizontal 4758A20098A 4758A20098A 346810 Motor Assembly,DC 4681A20091A 4681A20091A 349600 Bracket,Motor 4960A20016A 4960A20016A 359012 Fan,Turbo 5900A20063A 5900A20063A... - Page 72 Replacement Parts List Outdoor Unit PART No. LOCATION DESCRIPTION REMARKS ASUW096FUG0 ASUW126FUG0 552116 Tube Assembly,Reverse 5211A24134B 5211A24134B 552202 Valve,Reverse 5220AR3228D 5220AR3228D 435511-2 Cover 4994A20108A 4994A20108A REAR PANEL 263230-1 Thermistor Assembly 6323A20001B 6323A20001B OUTDOOR TEMP. 649950 Case Assembly,Control(Outdoor) 4995A20520N 4995A20520M 268711-5 PCB Assembly,Main 6871A10135N 6871A10135M OUTDOOR PCB...
- Page 73 November, 2006 P/No.: 3828A20926A Printed in Korea...