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LG AS-W306MMH0 Svc Manual
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LG AS-W306MMH0 Svc Manual

LG AS-W306MMH0 Svc Manual

Room air conditioner
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Room Air Conditioner

SVC MANUAL(Exploded View)
MODEL : AS-W306MMH0
AS-W306MMH1
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.

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Summary of Contents for LG AS-W306MMH0

  • Page 1: Room Air Conditioner

    Internal Use Only http://biz.lgservice.com Room Air Conditioner SVC MANUAL(Exploded View) MODEL : AS-W306MMH0 AS-W306MMH1 CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

  • Page 2: Table Of Contents

    Checking the drainage and forming the pipings .................25 Air purging ............................27 Test running ............................29 Functions............................30 Operation............................33 Disassembly............................40 Schematic Diagram ........................44 Troubleshooting Guide ........................48 Exploded View ..........................76 - 2 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Lg Model Name

    Nano Plasma F+4Way+(A/changeove)+A/clean+ Serial No. LG Model De velopment Serial No. * ARTCOOL COLOR Mirror White Blue Wood Metal Cherry - 3 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 4 Wire remocon Serial No. LG Model De velopment Serial No. * ARTCOOL COLOR Mirror White Blue Wood Metal Cherry - 4 - Copyright ©2008 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 ©2008 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 ©2008 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 ©2008 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 ©2008 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 ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 10: Dimensions

    This symbol indicates special notes. Indoor Unit Installation Plate Model 30k Btu Series Dimension mm(inch) 1,259(49.6) mm(inch) 349(13.7) mm(inch) 205(8.1) - 10 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 11: Outdoor Unit

    Dimensions Outdoor Unit MODEL 30k Btu Series unit 1,060 1,040 - 11 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: Product Specifications

    32.5, 30(1.27, 1.18) Indoor 1,259*205*349 Dimension inch 49.5*6.8*13.7 (W*H*D) Outdoor 870*1,038*320 inch 34.2*40.8*12.5 Net Weight Indoor kg(lbs) 20(44.1) Outdoor kg(lbs) 80(176.4) - 12 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 Energy Labeling Capacity Cooling 9.50 Heating 2.84 Energy Consumption Cooling 4.14 Heating Star Rating Cooling Heating SM+UE2 Tool (IN/OUT) - 13 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 14: Installation

    • Capacity is based on standard length and maximum allowance length is on the basis of reliability. • Oil trap should be installed every 5~7 meters. - 14 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: How To Fix Installation Plate

    Drilling the hole through the wall for piping con- nections must be done safely. Left rear piping Right rear piping ø 70mm 50mm 180mm - 15 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Flaring Work And Connection Of Piping

    (not possible to put them on after flaring work) = Improper flaring = Flare nut Copper tube Inclined Surface Cracked Uneven damaged thickness Even length all round - 16 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 Press the lower left and right sides of the unit against the installation plate until the hooks engage into their slots(click- ing sound). - 17 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 Setting line Indoor unit drain hose Vinyl tape(narrow) Adhesive Three upper hooks Indoor unit Installation plate Three lower hooks - 18 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 Wrap with vinyl tape Pipe Vinyl tape(wide) Drain hose - 19 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 Flare nut Vinyl tape(narrow) Connection pipe Torque wrench Connecting cable Indoor unit tubing Pipe Size[Torque] Capacity (Btu/h) LIQUID 5/8"[6.6kg.m] 3/8"[4.2kg.m] - 20 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 I Refix the front right side panel to the original position with the two screws. Right side panel - 21 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 22: Connection Of The Drain Hose

    Capacity (Btu/h) LIQUID 5/8"[6.6kg.m] 3/8"[4.2kg.m Outdoor unit Gas side piping (Bigger diameter) Liquid side piping (Smaller diameter) Torque wrench - 22 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 23: Connecting The Cable Between Indoor Unit And Outdoor Unit

    If a power plug is not to be used, provide a circuit breaker between power source and the unit as shown below. Main power source Conditioner - 23 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 24: Connect The Cable To The Outdoor Unit

    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. - 24 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 25: Checking The Drainage And Forming The Pipings

    Left side panel Tip of drain hose Less than dipped in water 50mm gap Water leakage Ditch - 25 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 26: Form The Piping

    Drain hose Taping Pipings Connecting cable Power supply cord Trap is required to prevent water from entering into electrical parts. - 26 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 27: Air Purging

    Nitrogen gas when the gauge reading reached 150 P.S.I.G. cylinder(in vertical Next, test for leaks with liquid soap. standing position) - 27 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 28: Finishing The Job

    This completes air purging with a vacuum pump. The air conditioner is now ready to test run. Vacuum pump - 28 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 29: Test Running

    2. Measure the temperature of the intake and dis- unit. charge of air. - 29 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 30: Functions

    (Cooling model only) is pressed and stops when you Plasma Mode : Lights up during plasma-purification press the button again. operation.(option) - 30 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 • Both the indoor and outdoor fan stops during defrosting. Hot-start Control (Heating) • The indoor fan stops until the evaporator pipe temperature will be reached at 34°C. - 31 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 32: Function Of Outdoor Unit

    • To protect comp from being overload, down comp Hz. Low Pressure Protection • If cylce pressure is low (around 0.3kgf/cm2), turn off comp and outdoor fan. - 32 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 33: Operation

    ➲ Setting Temp-0.5°C Compressor OFF Temp. • In 10-min dehumidification operation, the indoor fan operates with the low airflow speed. - 33 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 Setting Open step 4-Way Setting Setting Speed Speed Outdoor Hi Speed Setting Speed Indoor Start Starting Pre-Heat Deice STEP - 34 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 35: Auto Changeover

    Set Temp. change mode. - 0.5°C 20°C - 1°C - 2°C 10°C Auto Change COOLING HEATING Mode. - 35 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 36: Sleep Timer Operation

    • While in Chaos Swing mode, the angles of cooling and heating cycle operations are different. - 36 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 37: Forced Operation

    • When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds. • When the appliance-pause key is input by the remote control, the long "beep—" sounds. - 37 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 38: Display Function

    • Outdoor pipe temperature • Outdoor TH assy check thermistor open/short. 3sec 3sec (5times) • Communication line/circuit • Poor communication. check 3sec - 38 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 39: Remote Control Operations

    Used prior to using modes printed in blue at the bottom of buttons. 17. AUTO CLEAN (OPTIONAL) Used to set Auto Clean mode. - 39 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 40: Disassembly

    I Take care not to scratch the wall and mat to drop. Lower panel ™ Remove the left side panel. (Remove the 2 screws.) Left side panel - 40 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 Motor holder, Motor, Evaporator and P.C.B. Conductor Power Earth Conductor Conductor Sensor Conductor Step Motor Conductor - 41 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 42 • 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. - 42 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43 7. To remove the Cross-Flow Fan • Loosen the screw securing the holder bearing. • Lift up the cross-flow fan. Holder bearing Screw - 43 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 44: Schematic Diagram

    Schematic Diagram Schematic Diagram Wiring Diagram Indoor Unit Models: 30k Heat Pump Model Outdoor Unit Models: 30k Heat Pump Model - 44 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 45: Components Location

    I C 0 1 D I C 0 1 A D 0 3 D J 2 0 T X D J 0 3 - 45 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 46 N T C 0 1 K A D D R _ S / W S P M 2 C08K WCN_GND3 - 46 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 47 Schematic Diagram DISPLAY ASSEMBLY - 47 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 48: Troubleshooting Guide

    Troubleshooting Guide Troubleshooting Guide Refrigeration Cycle Diagram - 48 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 Open Pressure check (with charging cylinder) Open Open (Servicing) Open Gas releasing (with charging cylinder) Open Open (Servicing) - 49 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50 (5) Use torque wrench to tighten the service port a gas cylinder. nut to a torque of 1.8kg.cm. - 50 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 51: 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. - 51 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 52: Re-Air Purging

    – Close the valve on the gas cylinder and dis- charge the refrigerant until the gauge indicates 3 to 5 kg/cm - 52 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 – Discharge the refrigerant gradually; if it is dis- charged too suddenly, the refrigeration oil will also be discharged. - 53 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 54 (4) Disconnect the charge hose from the vacuum pump. – Vacuum pump oil. If the vacuum pump oil becomes dirty or depleted, replenish as needed. - 54 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 55: Gas Charging

    1 minute and then repeat the procedure (pumping down-pin). - 55 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 56 Cond. Pipe High 6times 1time Heatsink High 6times 2times Cond. Pipe Low 6times 3times Heatsoml Th error (Open/Short) 6times 5times - 56 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 57: Cycle Troubleshooting Guide

    2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. - 57 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 58: Electronic Parts Troubleshooting Guide

    3) Replace IC04D. 3) IC04D(7805) 4) The voltage of micom pin 21 4) Replace IC01A. 4) IC01A(KIA7036) : DC4.5V↑ - 58 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 59 -Voltage between CN1 ➀ - ➆ : DC +5V operate temperature regulating(L / M) and wind speed selecting. Check the Display PWB Ass'y • Check receiver ass'y - 59 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 60 The voltage of Pin No 1(orange) and 3(black) of CN-FAN. About AC 160V over About AC 50V over SSR is not damaged Check SSR - 60 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 61 If there are no problems after above checks. • Confirm the assembly condition that are catching and interfering parts in the link of the vertical louver - 61 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 62: General Information

    Open / Short Inlet pipe sensor Open / Short Communication(Indoor ↔ Outdoor) Communication Poorly Outlet pipe sensor Open / Short - 62 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 63 8 times Discharge Pipe Temp. High (INV) 3 times 2 times Discharge Pipe Temp. High (Cons.) 3 times 3 times - 63 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 64 6 times 2 times Heat sink temp. high Heat sink sensor (open/ short) 6 times 5 times Open / Short - 64 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 65 8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. ¡ Repair or Change the PCB. - 65 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 66 ¡ Check the another indoor unit. * CH05 is displayed at indoor unit, CH53 is displayed at out- door unit. - 66 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 67 5. Check the insulation from water at IPM part. ¡ Check the trace of water. 6. Check the IPM circuit. - 67 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 68 2. Check the fan operation is right. 3. Check the current. 4. Check the install condition. 5. Check the internal circuit. (C/T, Diode, Resistor) - 68 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 69 • Check the components. Check Point 1. Check the power source. 2. Check the components (B/Diode, Reactor, PSC Parts ) - 69 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 70 2. Check the install condition for over load. (Trans1, B/Diode, Diode, Resistance) 3. Check the SVC V/V open. 4. Check the leakage of refrigerant. - 70 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 71 2. Check the components 2. Check the insulation of IPM part. (IGBT, R04S, NF1, BD02S) 3. Check the compressor. (same with CH21) - 71 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 72 3. Check the leakage of refrigerant. 3. Check the leakage of refrigerant. 4. Check the constant compressor. (same with CH21) - 72 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 73 3. If the resistance of the sensor is 0 kΩ or ∞, then sensor is abnormal. Ω If the voltage of the sensor is 0 V or 5Vdc, then sensor is abnormal. - 73 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 74 • CH 51 1. Check the insertion condition of EEPROM. 1. Check the indoor unit capacity. 2. Check the poor soldering - 74 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 75 1. Check the install condition for over load. (Refrigerant, Pipe length, Blocked, …) 2. Check the Outdoor temp. is very high. - 75 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 76: Exploded View

    146811B 35211B 352150 268711B 266090 146811A 147581 263230A 135313 W0CZZA 249951 267110 152302 135314 152313 268711A 135316 135315 152302 - 76 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 77 Exploded View Outdoor Unit: AS-W306MMH0, AS-W306MMH1 - 77 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 78 July, 2008 P/NO : 3828A20347G...

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