LG AS-W096ERH0 Svc Manual

Universal air conditioner

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Service manual (70 pages)

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Page 1 Internal Use Only http://biz.lgservice.com Universal Air Conditioner SVC MANUAL(Exploded View) MODEL : AS-W096ERH0 AS-W096EBH0 AS-W096EVH0 AS-W126ERH0 AS-W126EBH0 AS-W126EVH0 CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.
Page 2: Table Of Contents
Air purging ............................22 Test running ............................24 Functions............................25 Operation............................28 Disassembly............................41 Troubleshooting Guide ........................44 Schematic Diagram ........................64 Product Specifications ........................69 Exploded View ..........................70 - 2 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 3: Lg Model Name
LG Model De velopment Serial No. * ARTCOOL COLOR Walnut Mirror White Gogh Sisley Blue Wood Quran Mecca Metal Cherry - 3 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 4 4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean+Oxy generator Dry contact Wire remocon Serial No. LG Model De velopment Serial No. * ARTCOOL COLOR Mirror Blue Silver - 4 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 5: Safety Precautions
Do not modify or extend the power cord. securely. • There is risk of fire of electric shock. • No grounding may cause electric shock. - 5 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 6 • If the base collapses, the air conditioner could fall product. with it, causing property damage, product failure, and personal injury. - 6 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 7 • There is risk of fire, failure of the product, or electric • There is risk of fire or failure of product. shock. - 7 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 8 Use two or more people to lift and transport the air conditioner. • To avoid vibration or water leakage. • Avoid personal injury. 90˚ - 8 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 9 • There is risk of personal injury and failure of product. • There are sharp and moving parts that could cause personal injury. - 9 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 10: Dimensions
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 9k, 12k Btu Series Dimension - 10 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 11: Outdoor Unit
Dimensions Outdoor Unit Gas side (3-way valve) Liquid side (2-way valve) MODEL 9k, 12k Btu Series unit - 11 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 12: Installation
More than 30cm More than 30cm • Oil trap should be installed every 5~7 meters. More More than 70cm than 60cm - 12 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 13: How To Fix Installation Plate
Distance (mm) CHASSIS (Grade) 7k, 9k, 12k, 14k 18k, 24k Adhesive Connecting Only the part desired direction Drain hose - 13 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 14: Flaring Work And Connection Of Piping
Yoke ing and drain hose, especially power Cone cord and connecting cable. Copper pipe Clamp handle Red arrow mark - 14 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 15: For Right Rear Piping
Press the lower left and right sides of the unit against the Pipe installation plate until the hooks engage into their slots(click- ing sound). Vinyl tape(narrow) - 15 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 16: For Left Rear Piping
• Insert the spacer etc. between the indoor unit and the installation plate and separate the bottom of the indoor unit from the wall. Indoor unit Spacer Installation plate - 16 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 18: Connection Of The Pipes-Outdoor
5/8" 6.3~8.2 Ø19.05 3/4" 9.9~12.1 Outdoor unit Gas side piping (Bigger diameter) Liquid side piping (Smaller diameter) Torque wrench - 18 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 19: Connecting The Cable Between Indoor Unit And Outdoor Unit
(Type "B" approved by HAR or SAA). Grade NORMAL CROSS 9k~14k -SECTIONAL AREA 0.75 Cable Type(B) H07RN-F H07RN-F H07RN-F H07RN-F - 19 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 20 9) The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an air gap contact separation of at least 3mm in each active(phase) conductors. - 20 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 21: Checking The Drainage And Forming The Pipings
Tip of drain hose Less than dipped in water Trap 50mm gap Water Water Water Waving leakage leakage leakage Ditch - 21 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 22: Air Purging
Usually, the cylinder is standing position) used in a vertical standing position. - 22 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 23 This completes air purging with a vacuum pump. The air conditioner is now ready to test run. Vacuum pump - 23 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 24: Test Running
The pressure of the gas side Refrigerant TEMP. service valve. R-22 35°C (95°F) 4~5kg/cm G(56.8~71.0 P.S.I.G.) R-410A 35°C (95°F) 8.5~9.5kg/cm G(120~135 P.S.I.G.) Power button - 24 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 25: Functions
--- Lights up in Preheat Mode (for Heating Model) --- Lights up in Plasma Air Clean Mode --- Lights up in during Energy-Saving Cooling Mode Operation - 25 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 26 Hot-start Control (Heating) • The indoor fan stops until the evaporator pipe temperature will be reached at 34°C. Heater (Optional) - 26 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 27 (Heating Mode) of outdoor temp. below 24°C (Cooling Mode) of outdoor temp. Discharge Pipe Temp. Control Low Ambient Comp. Torque Control Over Heating Protection (Comp.) - 27 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 28: Operation
➔ compressor, outdoor fan is turned on according to the condition of the room temperature. Indoor pipe temp. Comp. free 6˚C 7˚C Comp. Step 4 3˚C Comp. Step 2 0˚C Comp. off - 28 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 29: Cooling Mode Operation
• When intake air temperature reaches bolow the temp of setting –1.0°C, compressor operate step1~step3 and indoor fan speed repeatly operate low or stop. - 29 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 30: Heating Mode Operation
• When the Jet Cool key is input, the upper/lower vane is reset to those of the initial cooling mode and then operated in order that the air outflow could reach further. - 30 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 31 Basic pattern(1) Basic pattern(2) Basic pattern(3) Basic pattern(4) Basic pattern(5) Basic pattern(6) Basic pattern(7) Basic pattern(8) Basic pattern(9) Basic pattern(10) Basic pattern(11) Basic pattern(12) - 31 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 32: Sleep Timer Operation
Heating ON temp. (Setting temp. +2˚C) 1.0°C down 1.0°C down Heating OFF temp. (Setting temp. +4°C) Sleep time ( hr ) - 32 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 33: Forced Operation
- Indoor pan: Strong wind - COMP frequency: Step 5 - COMP compulsorily operates for about 18 minutes irrespective of indoor temperature. - 33 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 34: Power Relay Control
• If it’s 5 times within 1 hour in case of the temperature of outdoor pipe TH is over 65°C while the compressor is operating, the appliance turns off and display ERROR CODE 6. - 34 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 35: Portection From Overheating Of Power Module
T3 °C AS-W126ERH0/BH0/VH0 T2 °C T1 °C -13 °C COMP Freq. Free Fc-1 Fc-2 Fc-2 Fc-1 Free Fh min - 35 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 36 Setting Speed Speed Indoor Hi Speed Setting Speed Indoor Super low speed Start ° low speed Pre-Heat Deice STEP - 36 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 37: Auto Cleaning
Outdoor pipe temp. Outdoor fan On/Off control ° 0°C outdoor fan On/Off control °… Outdoor temp. - 0°C Time(Min.) - 37 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 38 - When selecting existing heat Logic : Flickering numbers of LED; 2 times 3) Setting is selectable regardless of operation status (on/off) - 38 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 39 Normal operation is done if re-operating the unit after Comp Off for 2min. - 39 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 40: Remote Control Operations
In some models this button has a 2nd function of LED luminosi- ty control. 18. LED LUMINOSITY (OPTIONAL) Used to adjust LCD luminosity. - 40 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 41: Disassembly
1. Before removing the control box, be sure to take out the wire screwed at the other end. Earth Conductor - 41 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 42 2EA in the Eva Holder, at the right 1EA). • When repair, do not damage the Caution label. - 42 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 43 Cross-flow fan • Remove the left end of the cross-flow fan from the self-aligning bearing. - 43 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 44: Troubleshooting Guide
3-WAY VALVE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE REVERSING 3-WAY VALVE ACCUMU VALVE LATOR COOLING COMPRESSOR HEATING - 44 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 45 Open Pressure check (with charging cylinder) Open Open (Servicing) Open Gas releasing (with charging cylinder) Open Open (Servicing) - 45 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 46 (5) Use torque wrench to tighten the service port a gas cylinder. nut to a torque of 1.8kg.cm. - 46 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 47: Pumping Down
– Open the low-pressure valve on the charge set slightly to air purge from the charge hose. (5) Set the 2-way valve to the closed position. - 47 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 48: Re-Air Purging
– Close the valve on the gas cylinder and dis- charge the refrigerant until the gauge indicates 3 to 5 kg/cm - 48 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 49 – Discharge the refrigerant gradually; if it is dis- charged too suddenly, the refrigeration oil will also be discharged. - 49 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 50 (4) Disconnect the charge hose from the vacuum pump. – Vacuum pump oil. If the vacuum pump oil becomes dirty or depleted, replenish as needed. - 50 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 51: Gas Charging
1 minute and then repeat the procedure (pumping down-pin). - 51 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 52: Cycle Parts
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. - 52 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 53: Self Diagnosis Function
1time 4 times 1time 4 times • Comp Phase Current Error (180 Driver Comp Control 3 sec Model Only) - 53 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 54 • Check the condition of connectors • The condition of P.C.B pattern. • The condition of P.C.B pattern. • The electronic components. - 54 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 55: Electronic Parts
4) Replace P.C.B Ass'y 5) IC01A(KIA7036) 5) The voltage of micom pin 19 5) Replace P.C.B Ass'y : DC4.5V↑ - 55 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 56 : DC +5V Check point • Check the connecting circuit between MICOM PIN and CN-DISP1 PIN • Check receiver ass'y - 56 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 57: Troubleshooting For Error Code
(air : about 10k Ω at 25 °C, outdoor pcb assembly R03H ~ R06H, C02H, C03H pipe : about 5k Ω at 25 °C) - 57 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 58 - Connect to CN-TH2 in - Measure resistance of TH. outdoor PCB assembly R01H, R02H, C01H (about 10k Ω at 25 °C) - 58 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 59 Check IC01K, IC02K,D01K~D03K, Install ground connection from outdoor ZD01K~ZD03K, R01K~R10K, unit. (In case power outlet has no earth port) C01K~C04K - 59 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 60 Assembling state of R01P ~ R21P & IC01P Assembling state of screw between INV-IC & Heat-sink DC 15V output of Power module. - 60 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 61 (refer marking on pcb and component) - Spec of R01N (1kΩ), R02N (1.65kΩ) is correct - Direction of diode (D01N, D02N) is right - 61 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 62 (Soldering state & Direction) - remove obstacles in connected to outdoor pcb - R01F~R05F, C01F~C03F, outdoor unit assembly (CN-FAN2) Q01F~Q04F, ZD01F - 62 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 63 - Check soldering state of - Measure resistance of TH. in outdoor pcb assembly R07H, R08H, C04H (about 200kΩ at 25°C.) - 63 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 64: Schematic Diagram
Schematic Diagram Schematic Diagram Wiring Diagram Indoor Unit Models: AS-W096ERH0/BH0/VH0 , AS-W126ERH0/BH0/VH0 - 64 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 65 Schematic Diagram Outdoor Unit Models: AS-W096ERH0/BH0/VH0 , AS-W126ERH0/BH0/VH0 - 65 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 66: Components Location
Schematic Diagram Components Location Indoor Unit Models: AS-W096ERH0/BH0/VH0 , AS-W126ERH0/BH0/VH0 • TOP VIEW • BOTTOM VIEW - 66 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 67 C08B R01D D03K IC01P IC02M C08J C16Z C09J C02J C01J C05H C02D C01D CN-D/A WCN-NOISE2 CN-LEV BL/WH WCN-NOISE3 BR/BK - 67 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 68 – 6871A00088A ASSM: 6871A00088 R01L CN_RECEIVER RECEIVER PWB: 6870A90719A C01R <COMPONENT SIDE> – 6871A20259D LCD MODULE – 6306A90009A White wire - 68 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 69: Product Specifications
35.2*11.1*6.5 35.2*11.1*6.5 (W*H*D) Outdoor 770*540*245 770*540*245 inch 30.3*21.3*9.6 30.3*21.3*9.6 Net Weight Indoor kg(lbs) 10.5(23.1) 10.5(23.1) Outdoor kg(lbs) 38(83.8) 38(83.8) - 69 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 70: Exploded View
733010 131410 359011 159830 342800 267110 354210 346810 135516 266090 352150 264110 35211B 268711C 146811B 263230B 135311 249951 147581 - 70 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 71 349600 552200 546810 559010 649950 55211G 263230D 661400 447910 552202 268711F 561410 552116 554160 261704 550140 552203A 430410 552203B - 71 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 72 P/No.: 3828A20462X JAN, 2008...

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As-w096ebh0 As-w126evh0 As-w096evh0 As-w126erh0 As-w126ebh0