LG AS-H096PBC0 Service Manual
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LG AS-H096PBC0 Service Manual

LG AS-H096PBC0 Service Manual

Ls-h126p*c0 series, as-h126p*c0 series, ls-c126p*c0 series, ls-h096p*c0 series, as-h096p*c0 series
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Room Air Conditioner

SERVICE MANUAL

CAUTION
-BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
-ONLY FOR AUTHORIZED SERVICE PERSONNEL.
MODEL : LS-H126P*C0
AS-H126P*C0
LS-C126P*C0
LS-H096P*C0
AS-H096P*C0

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Summary of Contents for LG AS-H096PBC0

  • Page 1: Room Air Conditioner

    WEBSITE http://biz.LGservice.com Room Air Conditioner SERVICE MANUAL CAUTION -BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. -ONLY FOR AUTHORIZED SERVICE PERSONNEL. MODEL : LS-H126P*C0 AS-H126P*C0 LS-C126P*C0 LS-H096P*C0 AS-H096P*C0...

  • Page 2: Table Of Contents

    Contents LG Model Name(2002)......................3 LG Model Name(2003~)......................4 Functions ..........................5 Product References ......................7 Dimensions ..........................8 Refrigeration Cycle Diagram ....................10 Wiring Diagram........................11 Operation Details ......................... 13 Display Function ........................19 Self-diagnosis Function....................... 19 Installation ..........................20 Operation ..........................

  • Page 3: Lg Model Name(2002)

    LG Model Name(2002) Code Type Code of Model Meaning Producing Center/ L: ChangWon R22, A: ChangWon R410A, C: ChangWon R407C Refrigerant Cooling & Heating C: Cooling Only Model H: Heat Pump Model Capacity(Btu/h) Cooling/Heating Capacity Ex. "12" 12,000Btu/h Electric Range...

  • Page 4: Lg Model Name(2003~)

    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 S: Out Sourcing...

  • Page 5: Functions

    Functions Indoor Unit Operation ON/OFF by Remote controller Sensing the Room Temperature • Room temperature sensor. (THERMISTOR) Room temperature control • Maintains the room temperature in accordance with the Setting Temp. Starting Current Control • Indoor fan is delayed for 5 sec at the starting. Time Delay Safety Control •...

  • Page 6: Remote Control

    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) Room, Temperature Checking : (Low:11°C High:39°C) Temperature Setting HIGH TEMPERATURE Down to 18°C...

  • Page 7: Product References

    Product References Model Name LS-H126P_ AS-H126P_ LS-C126P_ LS-H096P_ AS-H096P_ Item Unit 11,000 11,500 11,000 9,000 9,200 Cooling Capacity Btu/h 12,500 11,500 9,300 9,400 Heating Capacity 1.23 Moisture Removal 1,220~240,50 1,220~240,60 1,220~240,50 1,220~240,50 1,220~240,50 Power Source Ø, V, Hz 8.36 Indoor Air Circulation /min Outdoor...

  • Page 8: Dimensions

    Dimensions (1) Indoor Unit Hanger Hole Fix Hole Pipe Hole MODEL INDOOR UNIT Unit...
  • Page 9 (2) Outdoor Unit Gas side (3-way valve) Liquid side (2-way valve) MODEL All Models unit...

  • Page 10: Refrigeration Cycle Diagram

    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) VALVE CAPILLARY TUBE HEAT...

  • Page 11: Wiring Diagram

    Wiring Diagram (1) Indoor Unit 1. Heating Model AS-H096PBC0 LS-H096PBC0 AS-H096PWL1 AS-H096PDC0 LS-H096PDC0 LS-H096PBL1 AS-H096PMC0 LS-H096PMC0 LS-H096PDL1 AS-H126PBC0 LS-H126PBC0 LS-H096PML1 AS-H126PDC0 LS-H126PDC0 AS-H126PMC0 LS-H126PMC0 POWER AC ASM DC ASM POWER AC PWB ASM DC PWB ASM MOTOR STEP MOTOR MOTOR...

  • Page 12: Cooling Model

    BLOCK TERMINAL 1 ( L ) 2 ( N ) BLOCK GN/YL TO INDOOR UNIT TO INDOOR UNIT OUTDOOR WIRING DIAGRAM OUTDOOR WIRING DIAGRAM 3854A20051W 3854A30077B AS-H096PBC0 AS-H096PDC0 GN/YL COMP AS-H096PMC0 MOTOR C S R AS-H096PWL1 CAPACITOR LS-H096PBC0 LS-H096PBL1 RD BL YL...

  • Page 13: Operation Details

    Operation Details 1. MAIN UNIT FUNCTION • 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) Sleep Timer Indicator •...
  • Page 14 • 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 dehumidifica- tion operation and 4-min compressor off repeat. Compressor ON Temp. Setting Temp+0.5°C Compressor OFF Temp.
  • Page 15 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 Setting Temp + 0.5°C Compressor OFF Temp...
  • Page 16 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.
  • Page 17 Off-Timer Operation • When the set time is reached after the time is input by the remote control, the appliance stops operating. • The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached. •...

  • Page 18: Forced Operation

    Jet Cool Mode Operation (H/P Model) • While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the other mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated. •...

  • Page 19: Display Function

    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 • Timer Mode •...

  • Page 20: Installation

    Installation 1. Installation of indoor, Outdoor unit 1) Selection of the best location More than 60cm 1. Indoor unit More than 10cm More than 10cm • Do not have any heat or steam near the unit. • Select a place where there are no obstacles in front of the unit.
  • Page 21 3) Preparing work for Installation 2. Cover pipe and cover side remove • Remove two screws(for fixing cover pipe) The wall you select should be strong and solid enough • Pull up the cover side of desired connecting direc- to prevent vibration tion, then cover side is separated.

  • Page 22: Fixing Indoor Unit

    4) Sticking the installation guide map and fixing Indoor unit 1. Put an Installation Guide Map on the desired 7. Drill the piercing part for connecting pipe as surface. diameter 50mm. (In case of piercing rear surface) INSTALLATION GUIDE MAP Refer to No.

  • Page 23: Flaring Work And Connection Of Piping

    2. Flaring Work and Connection of Piping 1) Flaring work 4. Flaring work • Firmly hold copper pipe in a die in the dimension Main cause for refrigerant leakage is due to defect in shown in the table above. the flaring work. Carry out correct flaring work using the following procedure.
  • Page 24 2) Connection of piping Indoor • Tighten the flare nut with a wrench. • Preparing the indoor unit's piping and drain hose for installation through the wall. Open-end wrench (fixed) 1. Route the indoor tubing and the drain hose in the direction of rear left or right.
  • Page 25 • Wrap the area which accommodates the rear piping 2. Finally, tighten the flare nut with torque wrench housing section with vinyl tape. until the wrench clicks. • When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on Indoor Connection the wrench.

  • Page 26: Connecting The Cable Between Indoor Unit And Outdoor Unit

    3. Connecting The Cable Between Indoor Unit and Outdoor Unit 1) 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 27 2) Connect the cable to the outdoor unit Outdoor Unit 1. Remove the control cover from the unit by loos- Terminal block ening the screw. Connect the wires to the terminals on the control Over 5mm board individually. 2. Secure the cable onto the control board with the Connecting cable cord clamp.

  • Page 28: Checking The Drainage And Forming The Pipings

    4. checking the Drainage and forming the pipings 1) Checking the drainage • If you want to connect an additional drain hose, the end of the drain outlet should be routed above the 1. To check the drainage. ground. Secure the drain hose appropriately. •...
  • Page 29 5. Air Purging 1) Air purging • Do a leak test of all joints of the tubing(both indoor and outdoor) and both gas and liquid side service valves. Air and moisture remaining in the refrigerant system Bubbles indicate a leak. Be sure to wipe off the soap have undesirable effects as indicated below.
  • Page 30 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.

  • Page 31: Panel Front Assembly

    6. Panel Front Assembly 1. First, Check the side cover assembly exactly, Fix power cord in the bottom groove of cover side left. 2. Assemble connecting lead wire with controller and first fix the upper part of panel front, then match the lower part of panel front Panel Front Connector...

  • Page 32: Test Running

    7. 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. 1. Prepare remote control 1. Remove the battery cover by pulling it according to the arrow direction.

  • Page 33: Operation

    Operation Name and Function-Remote Control The remote control transmits the signals to the system. START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again. Signal transmitter OPERATION MODE SELECTION BUTTON Used to select the operation mode. ROOM TEMPERATURE SETTING BUTTONS Used to select the room temperature.

  • Page 34: Disassembly Of The Parts (Indoor Unit)

    Disassembly of the parts (Indoor unit) Warning : Disconnect the unit from power supply before making any checks. Be sure the power switch is set to “OFF”. 1. To remove the Grille from the Chassis. - Pull the grille bottom, the remove 2 securing screws. - Lift the both lower parts of panel front.
  • Page 35 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 Top Cover - Remove the securing screws from the chassis. - Pull the pipe cover, top cover and the air guide. Pipe Cover 5.

  • Page 36: 2-Way, 3-Way Valve

    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 37 1. Air purging Required tools : hexagonal wrench, adjustable The air in the indoor unit and in the piping must be wrench, torque wrenches, wrench to purged. If air remains in the refrigeration pipes, it will hold the joints, and gas leak affect the compressor, reduce to cooling capacity, and detector.

  • Page 38: Pumping Down

    2. 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 39 1) Re-air purging (Re-installation) Liquid side Indoor unit Closed Outdoor unit 2-Way valve Gas side Closed 3-Way valve Gas cylinder OPEN CLOSE • Procedure (6) Disconnect the charge set and the gas (1) Confirm that both the 2-way valve and the 3- cylinder, and set the 2-way and 3-way valves way valve are set to the closed position.
  • Page 40 2) Balance refrigerant of the 2-way, 3-way valves (Gas leakage) Liquid side Indoor unit Outdoor unit 2-Way valve Open Gas side 3-Way valve Open OPEN CLOSE • Procedure (3) Open the valve (Lo side) on the charge set and discharge the refrigerant until the gauge (1) Confirm that both the 2-way and 3-way valves indicates 0 kg/cm are set to the back seat.
  • Page 41 3. Evacuation (All amount of refrigerant leaked) Liquid side Indoor unit Outdoor unit 2-Way valve Open Gas side 3-Way valve Open Vacuum pump OPEN CLOSE • Procedure (4) Disconnect the charge hose from the vacuum pump. (1) Connect the vacuum pump to the charge set’s –...

  • Page 42: Gas Charging

    4. Gas Charging (After Evacuation) Liquid side Indoor unit Open Outdoor unit 2-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 43: Cycle Troubleshooting Guide

    Cycle Troubleshooting Guide 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 44: Electronic Parts Troubleshooting Guide

    Electronic Parts Troubleshooting Guide 1. 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 45 2. The product is not operate with the remote control. 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 46 3. 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 47 4. When indoor Fan does not operate. Turn off Main power Check the connection of CN-MOTOR1, 2 Check the Fan Motor (Motor resistance) (fig 1) Check the Fuse(AC250V/3.15A) - Check the soldering on AC PWB Assembly (6811A10096)/DC PWB (6871A10097). - AC PWB Assembly : check the connection CN-AC/DC - DC PWB Assembly : check the connection CN-AC/DC Turn ON Main Power Fan couln't operate for dehumidifying mode.
  • Page 48 5. When Louvers do 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-UD, LR1, LR2 Connector. •...
  • Page 49 6. 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 50 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. -50-...

  • Page 51: Electronic Control Device

    Electronic Control Device (1) MAIN P.W.B ASSEMBLY • TOP VIEW • BOTTOM VIEW -51-...
  • Page 52 (2) DISPLAY ASSEMBLY • LS-P126_SERIES (3) SUB P.W.B ASSEMBLY • LS-P126_SERIES CN-D4 PWB ASM:6871A20363 CN-D3 PWB:6870A90126A CN-D2 CN-D1 CN-CON(WH) CN-12V(WH) CN-D5 CN-SW(BL) CN-D7 CN-D6 CN-D8 -52-...

  • Page 53: Schematic Diagram

    Schematic Diagram -53-...

  • Page 54: Exploded View And Replacement Parts List

    Exploded View and Replacement Parts List 1. Indoor Unit -54-...
  • Page 55 Parts List(indoor) PART No. LOCATION DESCRIPTION REMARKS AS-H096PBC0 AS-H096PDC0 AS-H096PMC0 131410 CHASSIS ASSEMBLY 3141A20004D 135303 GRILLE,INLET 3530A10071B 3530A10071C 3530A10071D 135311-1 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069G 135311-2 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069H 135311-3 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069J 135312 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A20181B 3531A20181A 3531A20181C 135314 GRILLE ASSEMBLY,INLET...
  • Page 56 Parts List(indoor) PART No. LOCATION DESCRIPTION REMARKS LS-H096PBC0 LS-H096PDC0 LS-H096PMC0 131410 CHASSIS ASSEMBLY 3141A20004D 135303 GRILLE,INLET 3530A10071B 3530A10071C 3530A10071D 135311-1 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069G 135311-2 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069H 135311-3 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069J 135312 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A20181B 3531A20181A 3531A20181C 135314 GRILLE ASSEMBLY,INLET 3531A20183B 3531A20183C 3531A20183A...
  • Page 57 Parts List(indoor) PART No. LOCATION DESCRIPTION REMARKS LS-H126PBC0 LS-H126PDC0 LS-H126PMC0 131410 CHASSIS ASSEMBLY 3141A20004D 135303 GRILLE,INLET 3530A10071B 3530A10071C 3530A10071D 135311-1 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069G 135311-2 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069H 135311-3 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069J 135312 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A20181B 3531A20181A 3531A20181C 135314 GRILLE ASSEMBLY,INLET 3531A20183B 3531A20183C 3531A20183A...
  • Page 58 Parts List(indoor) PART No. LOCATION DESCRIPTION REMARKS AS-H126PBC0 AS-H126PDC0 AS-H126PMC0 131410 CHASSIS ASSEMBLY 3141A20004D 135303 GRILLE,INLET 3530A10071B 3530A10071C 3530A10071D 135311-1 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069G 135311-2 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069H 135311-3 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069J 135312 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A20181B 3531A20181A 3531A20181C 135314 GRILLE ASSEMBLY,INLET 3531A20183B 3531A20183C 3531A20183A...
  • Page 59 PART No. LOCATION DESCRIPTION REMARKS LS-C126PBC0 LS-C126PDC0 LS-C126PMC0 131410 CHASSIS ASSEMBLY 3141A20004D 135303 GRILLE,INLET 3530A10071B 3530A10071C 3530A10071D 135311-1 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069G 135311-2 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069H 135311-3 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069J 135312 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A20181E 3531A20181D 3531A20181F 135314 GRILLE ASSEMBLY,INLET 3531A20183E 3531A20183F 3531A20183D 135500-1 COVER 3550A20123A...
  • Page 60 2. Outdoor unit(All Model) 437210 437212 554031 435511 546810 552102-2 559010 649950 552201 552111 552102-1 552116 W0CZZ 552202 561410 554160 447910 550140 552203-1 430410 552203-2 -60-...
  • Page 61 Parts List(outdoor) PART No. LOCATION DESCRIPTION REMARKS LS-H126P*C0 AS-H126P*C0 LS-C126P*C0 LS-H096P*C0 AS-H096P*C0 430410 BASE ASSY,OUTDOOR 3041A20008K 3041A20008K 3041A20008J 3041A20008K 3041A20008K 435301 GRILLE, DISCHARGE 3530A20006B 3530A20006B 3530A20006B 3530A20006B 3530A20006B 567502 O.L.P 6750U-L094A 6750A30001C 6750U-L061A 552102-1 TUBE, CAPILLARY BEND 5210A21146B 5210A21146B 5210A21146B 5210A21146B 5210A21146B 552102-2 TUBE, CAPILLARY BEND 5210A21147C 5210A21147C 5210A21147F 5211A21147C 5211A21147C 435511...
  • Page 62 January, 2005 P/No.: 3828A20135L Printed in Korea...

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