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Table of Contents
Related Manuals for LG AS-H076PB
Summary of Contents for LG AS-H076PB
- Page 1 LG Room Air Conditioner SERVICE MANUAL MODELS: AS-H076PB/D/M/WL1 AS-H096PB/D/M/WL1 A-12AH series CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
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Page 2: Table Of Contents
Air Conditioner Service Manual TABLE OF CONTENTS LG Model Name ...............................3 Safety Precautions............................4 Dimensions ..............................8 Symbols used in this Manual........................8 Indoor Unit..............................8 Outdoor Unit...............................9 Product Specifications ..........................11 Installation ..............................12 Select the Best Location .........................12 Piping Length and Elevation........................12 Preparing Work for Installation .........................13 Fixing the Indoor Unit ..........................14... -
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: 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 Ensure that an installation Do not disassemble or repair Do not install the product at a frame of the outdoor unit is the product randomly. place that ther is concern of not damaged due to use for a falling down.
- Page 6 Safety Precautions Keep the flames away. Take the power plug out if neces- Do not use the power cord sary, holding the head of the plug near the heating tools. and do not touch it with wet hands. • Otherwise, it may cause a fire. •...
- Page 7 Safety Precautions I Installation Install the drain hose to Install the product so that the Always inspect gas leakage ensure that drain can be noise or hot wind from the after the installation and repair securely done. outdoor unit may not cause of product.
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Page 8: 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 may cause harm to the air conditioner. This symbol indicates special notes. NOTICE Indoor Unit Hanger Hole Fix Hole Pipe Hole Model... -
Page 9: Outdoor Unit
Dimensions Outdoor Unit Gas side (3-way valve) Liquid side (2-way valve) MODEL AS-H076PB/D/M/WL1 unit Service Manual 9... - Page 10 Dimensions Gas side (3-way valve) Liquid side (2-way valve) MODEL AS-H096PB/D/M/WL1, AS-H126PB/D/M/WL1 unit 10 Room Air Conditioner...
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Page 11: Product Specifications
Product Specifications Product Specifications Table-1 Model Name A-12AH series AS-H076PB/D/M/WL1 AS-H096PB/D/M/W/L1 Item Unit 7500 9200 12000 Cooling Capacity Btu/h 7700 9400 12200 Heating Capacity Moisture Removal 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz Power Source Ø, V, Hz... -
Page 12: Installation
Installation Installation Selection of the Best Location Indoor unit More than 60cm • Do not have any heat or steam near the unit. • Select a place where there are no obstacles in More than 10cm More than 10cm front of the unit. •... -
Page 13: Preparing Work For Installation
Installation Preparing Work for Installation Open front panel 1. Push the front panel backward and lift it up to remove the two screws. 2. As soon as you lift the both lower parts of panel front, you can hear the sound from panel front. At this moment panel front is separated 3. -
Page 14: Fixing The Indoor Unit
Installation Fixing the Indoor Unit 1. Attach an Installation guide map on the 6. 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 2. -
Page 15: Flaring Work
Installation Flaring Work Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure. Cutting the pipes and the cable. 1. Use the piping kit accessory or the pipes purchased Copper locally. -
Page 16: Connecting The Pipings
Installation Check Smooth all round 1. Compare the flared work with the figure by. Inside is shiny without scratches 2. If a flared section is defective, cut it off and do flaring = Improper flaring = work again. Inclined Surface Cracked Uneven damaged thickness... - Page 17 Installation Connecting the pipings with the indoor unit and drain hose with drain pipe 1. Align the center of the pipings and sufficiently tighten the flare nut by hand. Indoor unit tubing Flare nut Pipes 2. Tighten the flare nut with a wrench. Outside diameter Torque Open-end wrench (fixed)
- Page 18 Installation Outdoor Align the center of the pipings and sufficiently tighten the flare nut by hand. Finally, tighten the flare nut with torque wrench until the wrench clicks. Outdoor unit • When tightening the flare nut with torque wrench, Gas side piping (Bigger diameter) ensure the direction for tightening follows the arrow on the wrench.
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Page 19: Connecting The Cables To The Indoor Unit
Installation Connecting the Cables to the Indoor Unit. • Connect the cables to the indoor unit by connecting the wires to the terminals on the control board dividually according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the terminal No. -
Page 20: Connecting The Cables To The Outdoor Unit
Installation Connecting the Cables to the Outdoor Unit 1. Remove the control cover from the unit by loos- Outdoor Unit ening the screw. Connect the wires to the terminals on the control Terminal block board individually. 2. Secure the cable onto the control board with the Over 5mm cord clamp. -
Page 21: Checking The Drainage
Installation Checking the Drainage Forming the Piping 1. Checking the drainage. 1. Form the piping by wrapping the connecting portion of the indoor unit with insulation materi- • Pour a glass of water on the evaporator. al and secure it with two kinds of vinyl tapes. •... -
Page 22: Air Purging
Installation Air Purging Air and moisture remaining in the refrigerant system • Do a leak test of all joints of the tubing(both indoor have undesirable effects as indicated below. and outdoor) and both gas and liquid side service valves. • Pressure in the system rises. Bubbles indicate a leak. - Page 23 Installation 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 3-way valve sec, and close it.
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Page 24: Front Panel Assembly
Installation Front Panel 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 the front panel, and match the lower part of the front panel. -
Page 25: Test Running
Test Running Intake temperature 1. Check that all tubing and wiring have been properly 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 Discharge arrow direction. -
Page 26: Operation
Operation Operation Function of Controls DISPLAY 1) C/O Model (high quality LCD remote controller supplied) Operation Indicator • On while in appliance operation, off while in appliance pause Timer Indicator • On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled. Comp. -
Page 27: Heating Mode Operation
Operation I Healthy Dehumidification Mode • When the dehumidification operation input by the remote controller is received, the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature. 26°C ≤ Intake Air Temp =>... - Page 28 Operation 26°C ≤ Intake Air Temp => 25°C 24°C ≤ Intake Air Temp<26°C => Intake Air Temp+1°C 22°C ≤ Intake Air Temp<24°C => Intake Air Temp+0.5°C 18°C ≤ Intake Air Temp<22°C => Intake Air Temp Intake Air Temp<18°C => 18°C •...
- Page 29 Operation • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. 26°C ≤ Intake Air Temp => 25°C 24°C ≤ Intake Air Temp<26°C => Intake Air Temp+1°C 22°C ≤...
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Page 30: Sleep Timer Operation
Operation I Off-Timer <=> On-Timer Operation • When the set time is reached after the on/off time is input by the remote controller, the on/off-timer operation is carried out according to the set time. 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 controller while in appliance operation, the operation of the appliance stops. -
Page 31: Forced Operation
Operation - Operation Mode/Setting Temp/Selected Airflow Speed - Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour) I Forced Operation • Operation procedures when the remote control can't be used. • The operation will be started if the power button is pressed. •... - Page 32 Operation I Air Cleaner Operation • When an air cleaner function is selected during Air Conditioner operation - Plasma air cleaner function will be operated while in any operation mode with selecting the function. - The function is to be stopped while it is operating with selecting the function. •...
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Page 33: Display Function
Operation 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 •... -
Page 34: Self-Diagnosis Function
Operation Self-diagnosis Function Error Error Display LED Error contents SVC check point Code (Indoor body operation LED) • Indoor room temperature (once) thermistor open/short • Indoor Thermistor • Indoor pipe temperature assembly check 3sec 3sec 3sec thermistor open/short. 34 Room Air Conditioner... -
Page 35: Remote Control Operations
Operation Remote Control Operations The controls will look like the following. 1. START/STOP BUTTON Operation starts when this button is pressed and Controls stops when the button is pressed again. 2. OPERATION MODE SELECTION BUTTON Used to select the operation mode. 3. -
Page 36: 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. 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 37 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. - Remove the securing screws from the chassis. Air Guide Top Cover - Pull the pipe cover, top cover and the air guide.
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Page 38: Schematic Diagram
Schematic Diagram Schematic Diagram Electric Control Device • Heat Pump Model YL OR RD OR YL PK BL 38 Room Air Conditioner... -
Page 39: Wiring Diagram
Schematic Diagram Wiring Diagram Indoor Unit Outdoor Unit AS-H076PB/D/M/WL1 AS-H096PB/D/M/WL1 AS-H126PB/D/M/WL1 Service Manual 39... -
Page 40: Components Location
Schematic Diagram Components Location MAIN P.W.B ASSEMBLY (AC PART) • HEAT PUMP MODEL CN-GND1 D01D IC03D CN-MOTOR2 T/BLOCK CN-MOTOR1 CN-ACDC1 C01D D05D 1(L) Q01G C12D C11D R08D CN-COMP ZD02D SMPS R09D R05D C03D D06D 2(N) RY-COMP 250V-T3.15A Q02G 250V-T3.0A R16D 125V-T3.15A CN-OUT FUSE... - Page 41 Schematic Diagram DISPLAY ASSEMBLY – 6871A20462 TOP VIEW BOTTOM VIEW SUB P.W.B ASSEMBLY 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 Service Manual 41...
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Page 42: 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 43: 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 44: 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 45 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 46 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 47: 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 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 Troubleshooting Guide The product does 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 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).
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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-MOTOR1, 2 Check the Fan Motor Check the Fuse(AC250V/3.15A) - Check PWM signal from Micom Pin 50 - Check On/Off signal from micom pin14. - Check Voltage of CN-Motor 1, 2 (pin is about 15V) - Page 53 Troubleshooting Guide When Louvers do not operate. • Confirm that the Louver is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when rotating the Louver with hands Normal • Check the connecting condition of CN-UD, LR1, LR2 Connector. •...
- Page 54 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.
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Page 56: Exploded View
Exploded View Exploded View Indoor Unit 56 Room Air Conditioner... -
Page 57: Outdoor Unit
Exploded View Outdoor Unit (AS-H076PB/D/M/WL1) 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 (AS-H096PB/D/M/WL1, A-12AH.. 437210 437212 554031 435301 435511 546810 552102 559010 649950 552201 552111 552116 W0CZZ 552202 567502 561410 554160 447910 550140 552203-1 430410 552203-2 58 Room Air Conditioner...
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Page 59: Replacement Parts List
Replacement Parts List Replacement Parts List Indoor Unit PART No. LOCATION DESCRIPTION REMARKS A-12AH series AS-H076PB/D/M/WL1 AS-H096PB/D/M/WL1 131410 CHASSIS ASSEMBLY 3141A20004N 3141A20004D 3141A20004N 135303 GRILLE,INLET 3530A20077F 3530A20077F 3530A20077F 135311-1 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069G 3531A20069G 3531A20069G 135311-2 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A20069H 3531A20069H 3531A20069H... -
Page 60: Outdoor
Replacement Parts List Outdoor Unit PART No. LOCATION DESCRIPTION REMARKS A-12AH series AS-H076PB/D/M/WL1 AS-H096PB/D/M/WL1 430410 BASE ASSY,OUTDOOR 3041A20016A 3041A20008K 3041A20008K 435301 GRILLE,DISCHARGE 3530A20006B 3530A20006B 435511 COVER ASSEMBLY,CONTROL(OUTDOOR) 3551A30023Q 3551A30023E 3551A30023E 437210 PANEL ASSEMBLY,FRONT(OUTDOOR) 3720A10171A 3721A20027B 3721A20027B 437212 PANEL ASSY,REAR(OUTDOOR) 3720A10172A... - Page 61 Memo Service Manual 61...
- Page 62 Memo 62 Room Air Conditioner...
- Page 63 February, 2004 P/No.: 3828A20135S Printed in Korea...