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LG AS-H0966KA2 Service Manual
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LG AS-H0966KA2 Service Manual

LG AS-H0966KA2 Service Manual

Room air conditioner
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LG
Room Air Conditioner

SERVICE MANUAL

MODELS: AS-H0966KA2 (F09AHJ)
AS-H126RKA2 (F12AHJ)
AS-H186TKA2 (F18AHJ)
AS-H246TKA2 (F24AHJ)
website http://biz.LGservice.com
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
LG

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Summary of Contents for LG AS-H0966KA2

  • Page 1: Service Manual

    Room Air Conditioner SERVICE MANUAL MODELS: AS-H0966KA2 (F09AHJ) AS-H126RKA2 (F12AHJ) AS-H186TKA2 (F18AHJ) AS-H246TKA2 (F24AHJ) 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............................5 Dimensions..............................10 Symbols Used in this Manual ........................10 Indoor Unit..............................10 Outdoor Unit.............................11 Product Specifications ..........................14 Installation ..............................15 Selection of the Best Location........................15 Piping Length and Elevation........................15 How to Fix Installation Plate ........................16 Drill a Hole in the Wall ..........................16...

  • 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 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...

  • 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 Safety Precautions 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 Safety Precautions 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 •...

  • 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 Installation plate Model 9K Btu Series 12K Btu Series...

  • Page 11: Outdoor Unit

    Dimensions Dimensions Outdoor Unit Gas side (3-way valve) Liquid side (2-way valve) MODEL 9K Btu Series 12K Btu Series unit Service Manual 11...
  • Page 12 Dimensions Outdoor Unit Gas side (3-way valve) Liquid side (2-way valve) MODEL 18K But Series 12 Room Air Conditioner...
  • Page 13 Dimensions Outdoor Unit Gas side Liquid side MODEL 24K Btu Series 74.5 Service Manual 13...

  • Page 14: Product Specifications

    Product Specifications Product Specifications Table-1 Model Name AS-H0966KA2 AS-H126RKA2 AS-H186TKA2 AS-H246TKA2 (F09AHJ) (F12AHJ) (F18AHJ) (F24AHJ) Item Unit 2.48 3.52 5.28 6.74 Cooling Capacity 2.56 3.52 5.28 6.74 Heating Capacity Moisture Removal 1Ø,220-240V,50Hz 1Ø,220-240V,50Hz 1Ø,220-240V,50Hz 1Ø,220-240V,50Hz Power Source Ø, V, Hz 5.8/6.6...

  • Page 15: 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 structure and •...

  • Page 16: 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 17: 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 18: Indoor Unit Installation

    Flaring work and connection of piping Connecting the pipings to the indoor unit and For right rear piping drain hose to drain pipe. Route the indoor tubing and the drain hose in the direction of • Align the center of the pipes and sufficiently tighten rear right.

  • Page 19: For Left Rear Piping

    Flaring work and connection of piping • Bundle the piping and drain hose together by wrapping Connecting the pipings to the indoor unit and them with vinyl tape for enough to cover where they fit into the drain hose to drain pipe. the rear piping housing section.
  • Page 20 Flaring work and connection of piping • Wrap the area which accommodates the rear piping hous- Indoor unit installation ing section with vinyl tape. • Remove the spacer. Indoor Connection • Ensure that the hooks are properly seated on the installa- unit piping pipe tion plate by moving it left and right.

  • Page 21: Connection Of The Pipes-Outdoor

    Flaring work and connection of piping Connection of the pipes-Outdoor • Bad case Align the center of the pipings and sufficiently • Following bending type from right to left could cause tighten the flare nut by hand. problem of pipe damage. Finally, tighten the flare nut with torque wrench until the wrench clicks.

  • Page 22: Connecting The Cable Between Indoor Unit And Outdoor Unit

    Connecting the cable between indoor unit and outdoor unit Connecting the cable between indoor unit and outdoor unit 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 individually according to the outdoor unit connection.

  • Page 23: Connect The Cable To The Outdoor Unit

    Connecting the cable between indoor unit and outdoor unit Connect the cable to the outdoor unit Outdoor Unit Remove the control cover from the unit by Terminal block loosening the screw. Connect the wires to the terminals on the con- Over 5mm trol board individually.

  • Page 24: 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 remove the front panel from the indoor unit. Form the piping by wrapping the connecting portion of the indoor unit with insulation mate- •...

  • Page 25: Air Purging

    Air purgingd 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 26 Air purgingd Soap water method (1) Remove the caps from the 2-way and 3-way valves. Gas side (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 close it.

  • Page 27: Test Running

    Test running TEST RUNNING 1. Check that all tubing and wiring have been properly con- NOTE: If the actual pressure is higher than shown, the system is nected. most likely over-charged, and charge should be removed. If the actual pressure are lower than shown, the system is 2.

  • Page 28: 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) Comp. Running Incidator •...

  • Page 29: Defrost Control

    Operation • While in compressor off, the indoor fan repeats low airflow speed and pause. • While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification operation and 4-min compressor off repeat. ➲ Setting Temp+0.5°C Compressor ON Temp.

  • Page 30: Sleep Timer Operation

    Operation I Airflow Speed Selection • The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input of the airflow speed selection key on the remote control. 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 control while in appli- ance operation, the operation of the appliance stops.

  • Page 31: Test Operation

    Operation I Test operation • During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room tem- perature and resets in 18±1 minutes. • During test operation, if remote controller signal is received, the unit operates as remote controller sets. If you want to use this operation, open the front panel upward and Press the power button let it be pressed for about 3 seconds.

  • Page 32: Display Function

    Operation Display Function 1. Heating Model 2. Cooling Model Operation Indicator Operation Indicator • Cooling, Soft Dry, Fan, Heating • Cooling, Soft Dry, Fan Compressor on Indicator Deicer Indicator DOOR • Hot-start, Deice Self-diagnosis Function Error Error Display LED Error contents SVC check point Code (Indoor body operation LED)

  • Page 33: Remote Control Operations

    Operation Remote Control Operations The remote control transmits the signals to the system. Service Manual 33...

  • Page 34: 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 35 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 36 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 37: Schematic Diagram

    Schematic Diagram Schematic Diagram Electric Control Device • Heat Pump Model(LED TYPE) Service Manual 37...

  • Page 38: Wiring Diagram

    Schematic Diagram Wiring Diagram Indoor Unit Models: AS-H0966KA2 (F09AHJ), AS-H126RKA2 (F12AHJ), AS-H186TKA2 (F18AHJ), AS-H246TKA2 (F24AHJ) Outdoor Unit Models: AS-H0966KA2 Models: AS-H186TKA2 Models: AS-H246TKA2 (F09AHJ), (F18AHJ) (F24AHJ) AS-H126RKA2 (F12AHJ) OPTION BR(OR) CAPACITOR START COMP. CAPACITOR GN/YL BK(RD) MOTOR RY-S/CAPA T/B3 REVERSING...

  • Page 39: Components Location

    Schematic Diagram Components Location MAIN P.W.B ASSEMBLY • TOP VIEW CN-DISP1 250V/T2A CN-U/D FUSE RY-COMP CN-TH1 C02H C12L CN-4WAY CN-N1 C01H CN-N2 NF01J C09D R03D C01J ZNR01J R04F C02J C07D C01F RY-FAN RY-4WAY R11L IC01L C11L ZNR01F R01L R03L C08D C01A R02J D01L...
  • Page 40 Schematic Diagram DISPLAY ASSEMBLY – 6871A20575 40 Room Air Conditioner...

  • Page 41: 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 42: 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 43: 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 44 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 45 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-...

  • Page 46: 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 47 Troubleshooting Guide Additional gas charging (Gas leakage) • When refrigerant is insufficient by leakage, recharge the unit with the refrigerant up to normal operating suc- tion pressure. • Use the graph or the equation below to get operating suction pressure according to indoor and outdoor tem- perature.

  • Page 48: 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 49: 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 50: The Product Is Not Operate With The Remote Controller

    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 51: Compressor/Outdoor Fan Are Unable To Drive

    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).

  • Page 52: 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 53: When Vertical Louver Does Not Operate

    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 54: When Heating Does Not Operate

    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 55 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.

  • Page 56: Exploded View

    Exploded View Exploded View Indoor Unit 135312 152302 131410 733010 359011 342800 354210 147581 268712 346810 35211B 135516 352150 135311 146811 267110 249951 56 Room Air Conditioner...
  • Page 57 Exploded View Outdoor Unit: 9K,18K Btu/h Models 437210 437212 554031 435301 435511 546810 552102-2 559010 649950 552201 552111 552116 552102-1 W0CZZ 552202 567502 561410 554160 447910 550140 552203-1 430410 552203-2 Service Manual 57...
  • Page 58 Exploded View Outdoor Unit: 12k Btu/h Models 437210 435301 237205 437212 237204 435511 554031 546810 552111 559010 552201 552102-1 567502 W0CZZ 554160 447911 552202 649950 550140 552203-1 561410 552116 430410 552203-2 58 Room Air Conditioner...
  • Page 59 Exploded View Outdoor Unit: 24K Btu/h Model 554032 437212 552102-2 435512 552201 552111 552102-1 649950 W0CZZ 435511 559010 W0CZZ-2 668713 546810 552202 552116 553000 567502 447910 435301 554160 552203-2 550140 430410 552203-1 437210 Service Manual 59...

  • Page 60: Replacement Parts List

    Replacement Parts List Replacement Parts List Parts List (Indoor) Part No. LOCATION DESCRIPTION REMARKS ASNH0966KA2 ASNH126RKA2 ASNH186TKA2 ASNH246TKA2 (F09AHJ-N65) (F12AHJ-NR5) (F18AHJ-NT5) (F24AHJ-NT5) 131410 CHASSIS ASSEMBLY 3141A20017A 3141A20024A 3141A20028A 3141A20028A 135311 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A10301A 3531A10314A 3531A10325A 3531A10325A 135312 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A20249A 3531A10315B 3531A20272D 3531A20272D 135516 COVER ASSEMBLY,MOTOR...
  • Page 61 Replacement Parts List Parts List (Outdoor) Part No. LOCATION DESCRIPTION REMARKS ASUH0966KA2 ASUH126RKA2 ASUH186TKA2 ASUH246TKA2 (F09AHJ-U65) (F12AHJ-UR5) (F18AHJ-UT5) (F24AHJ-UT5) 430410 BASE ASSEMBLY,OUTDOOR 3040A20079A 3041A20072D 3041A10027A 3041A30003H 435511 COVER ASSY,CONTROL(OUTDOOR) 3551A30115D 3551A30136A 3551A30079N 3551A30007X 437210 PANEL ASSEMBLY,FRONT(OUTDOOR) 3720A20258A 3721A10153B 3721A20260A 3721A20005H 237204 PANEL SIDE 3720A29001A 237205 PANEL SIDE...
  • Page 62 July, 2005 P/No.: 3828A20462S Printed in Korea...

This manual is also suitable for:

As-h126rka2As-h246tka2As-h186tka2F09ahjF12ahjF18ahj as-h246tka2 (f24ahj)

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