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LG LSU093CE Service Manual
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LG LSU093CE Service Manual

LG LSU093CE Service Manual

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This Owner's Manual is provided and hosted by Appliance Factory Parts.
LG LSU093CE
Owner's Manual
Shop genuine replacement parts for LG LSU093CE
Find Your LG Air Conditioner Parts - Select From 2328 Models
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Summary of Contents for LG LSU093CE

  • Page 1 This Owner's Manual is provided and hosted by Appliance Factory Parts. LG LSU093CE Owner's Manual Shop genuine replacement parts for LG LSU093CE Find Your LG Air Conditioner Parts - Select From 2328 Models -------- Manual continues below --------...
  • Page 2 website http://www.lgservice.com Room Air Conditioner SERVICE MANUAL MODELS: LAN091CNP (ASNC091F2G0) LAU091CNP (ASUC091FUG0) LAN121CNP (ASNC121F2G0) LAU121CNP (ASUC121FUG0) LAN091HNP (ASNH091F2G0) LAU091HNP (ASUH091FUG0) LAN121HNP (ASNH121F2G0) LAU121HNP (ASUH121FUG0) LA090CPI (ASNC091F2G0) LA090CPO (ASUC091FUG0) LA120CPI (ASNC091F2G0) LA120CPO (ASUC091FUG0) LA090HPI (ASNH091F2G0) LA090HPO (ASUH091FUG0) LA120HPI (ASNH121F2G0) LA120HPO (ASUH121FUG0) CAUTION •...
  • Page 3 Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions ................................3 Dimensions ..................................9 Symbols Used in this Manual .............................9 Indoor Unit ..................................9 Outdoor Unit ................................10 Product Specifications ..............................11 Installation ..................................12 Installation Parts ...............................12 Installation Tools...............................12 Installtion Map................................13 Confirm the Refrigerant ............................14 Select the best Locations............................15 Piping Length and Elevation .............................16 Preparing Work for Installation ..........................17...
  • Page 4 Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. 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 Be cautious when unpacking and For installation, always contact Do not install the product on a installing the product. the dealer or an Authorized defective installation stand. Service Center. • Sharp edges could cause injury. Be • There is risk of fire, electric shock, •...
  • Page 6 Safety Precautions Use a dedicated outlet for this Grasp the plug to remove the Do not place a heater or other appliance. cord from the outlet. Do not appliances near the power cable. touch it with wet hands. • There is risk of fire or electrical •...
  • Page 7 Safety Precautions Do not open the inlet grill of the When the product is soaked Ventilate the product from time product during operation. (Do (flooded or submerged), contact to time when operating it togeth- not touch the electrostatic filter, an Authorized Service Center. er with a stove, etc.
  • Page 8 Safety Precautions Do not install the product where Use two or more people to lift Do not install the product where the noise or hot air from the out- and transport the air conditioner. it will be exposed to sea wind door unit could damage the (salt spray) directly.
  • Page 9 Safety Precautions Always insert the filter securely. Do not insert hands or other Do not drink the water drained Clean the filter every two weeks objects through the air inlet or from the unit. or more often if necessary. outlet while the air conditioner is plugged in.
  • Page 10 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 Hanger Hole Fix Hole Pipe Hole Model...
  • Page 11 Dimensions Outdoor Unit Gas side (3-way valve) Liquid side (2-way valve) MODEL 9k, 12k Models unit 770(30.3) 540(21.3) 245(9.6) 285(11.2) 64(2.5) 518(20.4) 10(0.4) 100(3.9) 10 Room Air Conditioner...
  • Page 12 Product Specifications Product Specifications AS-C091F2G0(LA091CNP) AS-C121F2G0(LA121CNP) AS-H091F2G0(LA091HNP) AS-H121F2G0(LA121HNP) Models AS-C091F2G0(LA090CP) AS-C121F2G0(LA120CP) AS-H091F2G0(LA090HP) AS-H121F2G0(LA120HP) Cooling Capacity 2.87 3.37 2.87 3.37 (Min~Rating~Max) Btu/h 9,800 11,500 9,800 11,500 Heating Capacity 2.87 3.37 (Min~Rating~Max) Btu/h 9,800 11,500 Power Input Cooling/Heating 1,100 980/980 1,100/1,100 Running Current Cooling/Heating 9.4/9.4 10/10...
  • Page 13 Installation Installation Read carefully, and then follow step by step. Installation Parts Installation guide map Type "A" screw and plastic anchor Remote control holder Type "B" screw Installation Tools Figure Name Figure Name Screw driver Ohmmeter Electric drill Hexagonal wrench Measuring tape, Knife Ammeter Hole core drill...
  • Page 14 Installation Installation Map Installation parts you should purchase. NOTICE More than More than More than 3.9"(10cm) 3.9"(10cm) 7.9"(20cm) More than 19.6"(50cm) (Left and right Sleeve are identical) Bushing-Sleeve Putty(Gum Type Sealer) Bend the pipe as close as possible on the wall but be careful so that it may not break.
  • Page 15 Installation Confirm The Refrigerant 1. Check the quality label on the indoor and outdoor unit. 2. Make certain that the refrigerant is R-410A. NOTICE THIS PRODUCT CONTAINS R-410A REFRIGERANT 1) Different compressor oil - R-410A(Polyol ester) / R-22(Mineral). - Do not mix the existing mineral oil. - Do not apply used pipe, tools and gauges covered with the existing mineral oil.
  • Page 16 Installation Select the best Location Indoor unit 1. Do not have any heat or steam near the unit. 2. Select a place where there are no obstacles in front of the unit. More than More than 7.9"(20cm) 3. Make sure that condensation drainage can be conve- 19.6"(50cm) niently routed away.
  • Page 17 Installation Piping Length and Elevation Standard Max. Max. Additional Pipe Size Capacity Length Elevation length Refrigerant (Btu/h) Suction Evap m(ft) m(ft) m(ft) g/m(oz/ft) 9k, 12k Ø12.7mm(1/2") Ø6.35mm(1/4") 7.5(25) 7.5(25) 15(49) 20(0.22) Indoor unit Outdoor unit Outdoor unit Oil trap Indoor unit Outdoor unit Indoor unit If piping length is more than 16.4ft(5m)
  • Page 18 Installation Preparing Work for Installation Open panel front 1. Pull the upper part of the front panel. 2. Lift up the panel. 3. To detach the front panel, remove the two screws at the lower part. 4. Detach the front panel from the body. 5.
  • Page 19 Installation Fixing Indoor Unit 1. Attach an Installation guide map on the 2. 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 3.
  • Page 20 Flaring work and connection of piping Flaring work and connection of piping 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.
  • Page 21 Flaring work and connection of piping Check 1. Compare the flared work with the figure by. Smooth all round Inside is shiny without scratches 2. If a flared section is defective, cut it off and do flaring work again. = Improper flaring = Inclined Surface Cracked Uneven...
  • Page 22 Flaring work and connection of piping Connecting the piping 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 Pipings 2.
  • Page 23 Flaring work and connection of piping CAUTION: Installation Information For right piping. Follow the instruction below. Good case • Press on the upper side of clamp and unfold the tubing to downward slowly. Bad case • Following bending type from left to right may cause damage to the turbing. 22 Room Air Conditioner...
  • Page 24 Flaring work and connection of piping Connection of Piping -Outdoor Put a couple drops of refrigerant oil on the face of the flare before assembling taking care not to add any contaminants. Align the center of the pipings and sufficiently tighten the flare nut by hand.
  • Page 25 Connecting the cable between indoor unit and outdoor unit Connecting the cable between indoor unit and outdoor unit Connecting the Cables 1. Remove the cover control from the unit by loosening Wiring Diagram the screw. Connecting cable(Low voltage) b 2. Dismount caps on the conduit panel. Indoor Unit Outdoor Unit Terminal...
  • Page 26 Connecting the cable between indoor unit and outdoor unit Connection method of the connecting cable(Example) 1. Dismount two-caps on the conduit panel. 2. Make a hole appropriate for the passage of connec- tion cable through on cap by tool. (for low voltage line) Terminal 3.
  • Page 27 Connecting the cable between indoor unit and outdoor unit CAUTION After the confirmation of the above conditions, prepare the wiring as follows: 1) Never fail to have an individual power circuit specifically for the air conditioner. As for the method of wiring, be guided by the circuit diagram posted on the inside of control cover.
  • Page 28 Checking the drainage and forming the pipings Checking the drainage and forming the pipings Checking the Drainage To check the drainage. 1. Pour a glass of water on the evaporator. 2. Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit.
  • Page 29 Checking the drainage and forming the pipings Forming the Piping Form the piping by wrapping the connect- Seal small openings ing portion of the indoor unit with insula- around pipings with a tion material and secure it with two kinds gum type sealer.
  • Page 30 Air purgingd AIR PURGING Air Purging Air purging The air and moisture remaining in the refrigerant system have undesirable effects as indicated below. 1. Pressure in the system rises. 2. Operating current rises. 3. Cooling(or heating) efficiency drops. 4. Moisture in the refrigerant circuit may freeze and block capillary tubing. 5.
  • Page 31 Air purgingd Soap water method 1. Remove the caps from the 2-way and 3-way valves. Liquid side 2. Remove the service-port cap from the 3-way valve. 3. To open the 2-way valve turn the valve stem counterclock- wise approximately 90°, wait for about 2~3 sec, and close it. 4.
  • Page 32 Air purgingd Charging Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft) line set. Any time a line set is used either shorter or longer then the nominal 7.5m(25ft) line set length the refrigerant charge has to be adjusted.
  • Page 33 Air purgingd Panel Front 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 panel front, and match the lower part of panel front.
  • Page 34 Test running TEST RUNNING Test Running 1. Check that all tubing and wiring are properly 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 arrow direction.
  • Page 35 Test running If the actual pressure is higher than shown, the system is most likely over-charged, and charge should be NOTICE removed. If the actual pressure are lower than shown, the system is most likely undercharged, and charge should be added. PUMP DOWN This is performed when the unit is relocated or the refrigerant circuit is serviced.
  • Page 36 How to replace picture & photograph How to replace picture & photograph Turn off power and then open Pull out the both links of lower Push and close the top part of the upper part of front panel. part of front panel, as the front panel and then pull described in the below picture.
  • Page 37 Operation Operation 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 seconds at the starting. Time Delay Safety Control •...
  • Page 38 Operation The function of main control 1. Time delay Safety Control • 3min.; The compressor operation is delayed for 3 minutes to balance the pressure of cycle. (Protection of compressor) • 5sec.; The indoor fan is delayed for 5 seconds, when operating initially, to prevent noises occurred by the vertical louver and wind.
  • Page 39 Operation . Auto Operation (Electronic control mode) • The operation procedure is shown below. (Cooling & Heating Model) Press Start/Stop Button Select Auto Operation Mode Check the Room temperature Operation mode Indoor fan speed are decided automatically by the unit electronic control. Setting temperature Intake-air Over...
  • Page 40 Operation Auto Operation for Dehumidification(only Heating Model) • The Setting temperature will be same that of the auto operation for cooling. - Compressor ON temperature; Setting temperature +2°F - Compressor OFF temperature; Setting temperture -1°F Intake-air temp. below 68°F Over 68°F~below 70°F over 86°F Setting temp.
  • Page 41 Operation 6. Heating Operation Mode(only Heating Model) The unit will operate according to the setting conditions by the remote controller. The operation diagram is shown below. INTAKE AIR TEMP. SETTING TEMP. + 6°F (Compressor OFF) SETTING TEMP. (Compressor ON) minimum minimum minimum 1 min.
  • Page 42 Operation 7. Cooling or Heating Mode with Sleep Mode Auto Control • When selecting the Cooling( ) or the Heating( ) combined with the Sleep Mode Auto Control( ), the operation diagram is as following. Cooling Mode with the Sleep Mode •...
  • Page 43 Operation 8. Forced Operation Operation procedures when the remote control can't be used. The operation will be started if the power button is pressed. If you want to stop operation, re-press the button. ON/OFF button Cooling Heat pump Model Room Temp. ≥ 76°F(24°C) 70°F(21°C) ≤ Room Temp. < 76°F(24°C) Room Temp. < 70°F(21°C) Model Operating mode Cooling...
  • Page 44 Operation Display Function Signal Receptor Receives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.) Operation Indication Lamps On/Off : Lights up during the system operation. Self-diagnosis Function Error Error LED Error contents SVC check point Code (Indoor body operation LED) •...
  • Page 45 Operation Remote Control Operations The controls will look like the following. 1. START/STOP BUTTON Controls Operation starts when this button is pressed and stops when the button is pressed again. 2. OPERATION MODE SELECTION BUTTON Signal transmitter Used to select the operation mode. 3.
  • Page 46 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 47 Disassembly 3. To remove the Evaporator. - Remove hole tubing holde. - Remove 2 screws securing the evaporator. - Pull the evaporator out from the chassis carefully. Air Guide 4. Before removing the Turbo Fan. - Remove the securing screws from the chassis. Top Cover - Pull the pipe, top cover and the air guide.
  • Page 48 Schematic Diagram Schematic Diagram Heat Pump/Cooling Only Series(Indoor Unit) Service Manual 47...
  • Page 49 Schematic Diagram Heat Pump Series/ Cooling Only Series (Outdoor Unit) 48 Room Air Conditioner...
  • Page 50 Schematic Diagram INDOOR UNIT P.W.B. ASSEMBLY • P/No.: 6871A20999A (PCB ASSEMBLY, MAIN) Top View Bottom View Service Manual 49...
  • Page 51 Schematic Diagram OUTDOOR UNIT P.W.B. ASSEMBLY • P/No.: 6871A20901C (PCB ASSEMBLY, MAIN) Top View Bottom View 50 Room Air Conditioner...
  • Page 52 Schematic Diagram DISPLAY P.W.B. ASM • P/No.: 6871A20921A (PCB ASSEMBLY) Service Manual 51...
  • Page 53 Schematic Diagram Wiring Diagram (1) Indoor Unit (Cooling Only Models, & Heating Models) 52 Room Air Conditioner...
  • Page 54 Schematic Diagram (2) Outdoor Unit(Cooling Only Models, & Heating Models) Service Manual 53...
  • Page 55 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 CAPILLARY TUBE HEAT HEAT...
  • Page 56 Troubleshooting Guide Piping Length and Elevation Standard Max. Max. Additional Pipe Size Capacity Length Elevation length Refrigerant (Btu/h) Suction Evap m(ft) m(ft) m(ft) g/m(oz/ft) 9k, 12k Ø12.7mm(1/2") Ø6.35mm(1/4") 7.5(25) 7.5(25) 15(49) 20(0.22) Indoor unit Outdoor unit Outdoor unit Oil trap Indoor unit Outdoor unit Indoor unit...
  • Page 57 Troubleshooting Guide 3-way Valve Pumping Down Liquid side Indoor unit Open Outdoor unit 3-Way valve Gas side Closed 3-Way valve CLOSE CLOSE Purge the air • Procedure (6) Operate the air conditioner in cooling mode (1) Confirm that both liquid side and gas side and stop it when the gauge indicates valves are set to the open position.
  • Page 58 Troubleshooting Guide 1) Re-air purging (Re-installation) Liquid side Indoor unit Closed Outdoor unit 3-Way valve Gas side Closed 3-Way valve Gas cylinder Refrigerant OPEN CLOSE • Procedure (6) Disconnect the charge set and the gas cylin- (1) Confirm that both the liquid side valve and the der, and set the Liquid side and Gas side gas side valve are set to the closed position.
  • Page 59 Troubleshooting Guide 2) 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 liquid side and gas side (3) Open the valve (Lo side) on the charge set and valves are set to the back seat.
  • Page 60 Troubleshooting Guide 2. 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 61 Troubleshooting Guide 3. 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 62 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 63 Troubleshooting Guide Cycle Parts Trouble analysis 1. Check temperature difference between intake and discharge air and operating current. Temp. difference : approx. 0˚F(0°C) • All amount of refrigerant leaked Current : less than 80% of out. Check refrigeration cycle. rated current Temp.
  • Page 64 Troubleshooting Guide Electronic Parts (9k model) Product does not operate at all. (* Refer to Electronic Control Device drawing and Schematic diagram.) Turn off Main Power (After 20 seconds) Turn on Main Power Does "beeping" sound is made from the Indoor Unit? Primarily, the operating condition of Micom is OK.
  • Page 65 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 66 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 2°F at least. When in Fan 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 67 Troubleshooting Guide When indoor Fan does not operate. Does the voltage of each terminals of CN-MOTOR CONNECTOR in Indoor unit corresponds to values in the Table of page 72 Does the voltage of terminal of CN-DC/DC CONNECTOR in Check connecting condition of the CN-MOTOR CON- Indoor unit corresponds to the values in the table of page 72 NECTOR Do the voltage of terminal of...
  • Page 68 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-UP/DOWN Connector •...
  • Page 69 Troubleshooting Guide When a comunication error occurs. • The operation indicator of Indoor unit blinks five times. • The red indicator of Outdoor unit blinks five times. Check the connecting wires between Indoor and Outdoor unit for the connecting error and the contacting condition. Check the installation condition of outdoor unit.
  • Page 70 Troubleshooting Guide The phenomena in case of connecting error INDOOR UNIT Connector Type Phenomena Condition CN-DC/DC Open and connecting error • The same as the phenomenon of Outdoor Unit. Blue Black Brown • The indoor fan does not operate. CN-MOTOR Open •...
  • Page 71 Troubleshooting Guide OUTDOOR UNIT Connector Type Condition Phenomena • All functions stop. • The operation with the remote controller, forced and OPEN test one do not operate. CN-POWER Connecting reversely • PWB pattern is damaged when applying the power. • All functions stop or the compressor does not operate. OPEN •...
  • Page 72 Troubleshooting Guide Voltage of Connectors according to Indoor Fan Speed Input Power INDOOR MOTOR INDOOR PWB ASSY TAB-N RY-COMP-A RY-COMP-B Connecting wires CN-DC/DC between Indoor and Outdoor 1 2 3 4 5 Indoor Outdoor Connecting Terminal Connecting Terminal CN-DC/DC BL BK BR RD No.
  • Page 73 Exploded View Exploded View Indoor Unit 135316 268711-4 146811-2 152302 135080 145200 268711-1 249951 135515 268711-3 354210 267110 131410 INLET AIR EVA MIDDLE 146811-1 266090 567480-1 35211B 352150 135500-2 159830 330870 346810 349600 146811-1 147581 135500-1 352380 359012 NOTE) Please ensure GCSC since the replacement parts may be changed demending upon the buyer's request. Please check the correct parts in View RPL(Replacement Part List)on GCSC.
  • Page 74 Exploded View 2. Outdoor Unit 437212 554031 567480-4 435511 549610 546810 559010 649950 552113 552116 W0CZZ 552202 561410 268711-6 567480-6 566000 SUCTION 567502 554160 447910 437211 550140 552203-2 430410 435301 552203-1 NOTE) Please ensure GCSC since the replacement parts may be changed demending upon the buyer's request. Please check the correct parts in View RPL(Replacement Part List)on GCSC.
  • Page 75 Replacement Parts List Replacement Parts List Parts List(Indoor) PART No. LOCATION DESCRIPTION REMARKS LAN091CNP LAN091HNP LAN121CNP LAN121HNP LA090CPI LA090HPI LA120CPI LA120HPI (ASNC091F2G0) (ASNH091F2G0) (ASNC121F2G0) (ASNH121F2G0) 131410 Chassis Assembly 3141A20037C 3141A20037C 3141A20037C 3141A20037C 146811-1 Motor Assembly,DC,Stepping 4681A20055A 4681A20055A 4681A20055A 4681A20055A Discharge 147581 Louver,Horizontal 4758A20098A...
  • Page 76 Replacement Parts List Parts List(Outdoor) PART No. LOCATION DESCRIPTION REMARKS LAU091CNP LAU091HNP LAU121CNP LAU121HNP LA090CPO LA090HPO LA120CPO LA120HPO (ASUC091FUG0) (ASUH091FUG0) (ASUC121FUG0) (ASUH121FUG0) 430410 Base Assembly,Outdoor 3041A20008K 3041A20008K 3041A20008K 3041A20008K 552203-1 Valve,Service 5220A20006A 5220A20006A 5220A20006A 5220A20006A Gas Pipe 552203-2 Valve,Service 5220A20005B 5220A20005B 5220A20005B 5220A20005B...
  • Page 77 December, 2006 P/No.: 3828A20926C Printed in Korea...

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