Related Manuals for LG LS301HE
Summary of Contents for LG LS301HE
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Page 1: Service Manual
Room Air Conditioner SERVICE MANUAL MODELS: LS301HE LS301CE 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 Safety Precautions............................3 Dimensions..............................8 Symbols Used in this Manual ........................8 Indoor Unit..............................8 Outdoor Unit...............................9 Product Specifications ..........................10 Installation ..............................12 Piping Length and Elevation........................12 How to Fix Installation Plate ........................13 Drill a Hole in the Wall ..........................13 Flaring work and connection of piping .......................14 Flaring work..............................14 Connection of piping-Indoor ........................15... -
Page 3: Safety Precautions
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 4 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 5 Safety Precautions 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 6 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 7 Safety Precautions 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 •...
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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 could cause harm to the air conditioner. NOTICE This symbol indicates special notes. Indoor Unit Tubing hole cover Tubing hole cover Installation plate Model... -
Page 9: Outdoor Unit
Dimensions Outdoor Unit Gas side 3-way valve Liquid side 3-way valve MODEL 30k SERIES mm(in ch) 870(34.3) mm(in ch) 800(31.5) mm(in ch) 320(12.6) mm(in ch) 370(14.6) mm(in ch) 340(13.4) mm(in ch) 25(1.0) mm(in ch) 775(30.5) mm(in ch) 25(1.0) mm(in ch) 546(21.5) mm(in ch) 162(6.4) -
Page 10: Product Specifications
Product Specifications Product Specifications Cooling Only Items Unit LS301CE Power Supply ø, V, Hz 230/208,60 Cooling Capacity BTU/h 28,000/27,000 Input 3,600/3,450 Running Current 16.0/16.5 COMP. Locked Rotor AMP. E.E.R BTU/hW 7.81/7.79 Air Circulation /min(cfm) 21(740) Moisture Removal l/h(pts/hr) 3.7(7.8) Noise Level Indoor, High dB(A) (Sound... - Page 11 Product Specifications Cooling & Heating Items Unit LS301HE Power Supply ø, V, Hz 1,230/208,60 Cooling Capacity BTU/h 28,000/27,000 Heating Capacity BTU/h 29,000/28,000 Input Cooling 3,600/3,450 Heating 3,750/3,550 Running Current Cooling 16.0/16.5 Heating 16.5/17.0 COMP. Locked Cooling Rotor AMP. Heating E.E.R BTU/hW 7.78/7.82...
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Page 12: Installation
Installation Installation Installation Parts Provided 2. Outdoor unit If an awning is built over the unit to prevent direct sunlight or 1. Type "A" screw rain exposure, make sure that heat radiation from the con- 2. Installation Plate denser is not restricted. Ensure that the space around the back and sides is more than 10cm(4"). -
Page 13: 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 enough to prevent Drill the piping hole with a ø70mm (0.76") hole vibration core drill. Drill the piping hole at either the right or the left with the hole slightly slanted to the out- 1. -
Page 14: Flaring Work And Connection Of Piping
Flaring work and connection of piping Flaring work and connection of piping Flaring work Main cause for gas leakage is due to defect in flar- 4. Flaring work ing work. Carry out correct flaring work in the follow- Carry out flaring work using flaring tool as shown ing procedure. -
Page 15: Connection Of Piping-Indoor
Flaring work and connection of piping Connection of piping-Indoor CAUTION 1. Remove the 2 screws of right side panel. When install, make sure that the remaining parts must be removed clearly so as not to Right side panel damage the piping and drain hose, especially power cord and connecting cable. - Page 16 Flaring work and connection of piping 3. Tape the tubing, drain hose and the connecting 3. Tape the tubing, drain hose and the connecting 5. Connecting the pipings to the indoor unit and drain cable. Be sure that the drain hose is located at the cable.
- Page 17 Flaring work and connection of piping 6. Wrap the insulation material around the connecting For right rear piping portion. Overlap the connection pipe insulation material and 1. Route the indoor tubing and the drain hose to the the indoor unit pipe insulation material. Bind them required piping hole position.
- Page 18 Flaring work and connection of piping 5. Indoor unit installation When extending the drain hose at the indoor unit, install the drain pipe. Hook the indoor unit onto the upper portion of the installation plate.(Engage the three hooks of the rear top and rear lower of the indoor unit with the upper edge and lower edge of the installation Drain hose...
- Page 19 Flaring work and connection of piping Bundle the piping and drain hose together by 9. Reinstall the parts to the original position. wrapping them with cloth tape over the range Refix the lower panel to the original position. within which they fit into the rear piping housing section.
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Page 20: Connection Of The Drain Hose
Flaring work and connection of piping Connection of the drain hose Connection of piping-Outdoor The drain hose can be connected at two different 1. Align the center of the pipings and sufficiently tighten the flare nut by hand. positions. Use the most convenient position and, if necessary, exchange the position of the drain pan, rubber cap and the drain hose. -
Page 21: 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 22: 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 1. Remove the control cover from the unit by loosen- ing the screw. Connect the wires to the terminals on the control Terminal block board individually. -
Page 23: Checking The Drainage And Forming The Pipings
Checking the drainage and forming the pipings Checking the drainage and forming the pipings Checking the drainage 1. Remove the right side panel. 4. To check the drainage. Pour a glass of water on the drain pan. Ensure the water flows through the drain hose of Right side panel the indoor unit without any leakage and goes out the drain exit. -
Page 24: Form The Piping
Checking the drainage and forming the pipings Form the piping 1. Form the piping by wrapping the connecting por- 3. In cases where the Outdoor unit is installed above tion of the indoor unit with insulation material and the Indoor unit perform the following. secure it with two kinds of vinyl tapes. -
Page 25: Air Purging
Air purgingd AIR PURGING 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 Air and moisture remaining in the refrigerant system valves. have undesirable effects as indicated below. Bubbles indicate a leak. - Page 26 Air purgingd Soap water method Gas side (1) Remove the caps from the gas side and liquid side valves. (2) Remove the service-port cap from the gas side valve. (3) To open the gas side valve turn the valve stem counter- clockwise approximately 90°, wait for about 2~3 sec, and close it.
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Page 27: Test Running
Test running TEST RUNNING 1. Check that all tubing and wiring have been prop- 3. Ensure the difference between the intake temper- erly connected. ature and the discharge is more than 46˚F(8°C) 2. Check that the gas and liquid side service valves (Cooling) or reversely (Heating). -
Page 28: Operation
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 29: Remote Controller
Operation Remote Controller 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) (CHAOS) Room, Temperature Display : (High:98°F(39˚C) Low:54°F(12˚C)) Temperature Setting HIGH TEMPERATURE... -
Page 30: The Function Of Main Control
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 31 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 32 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 33 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 34 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 •...
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Page 35: Forced Operation
Operation 8. Forced Operation To operate the appliance by force in case that the remote controller is lost, the forced operation button is on the main unit of the appliance to operate the appliance in the standard conditions. • Press the forced operation button, the forced operation is carried out. •... -
Page 36: Display Function
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. Timer or Sleep Mode : Lights up during Timer operation or Sleep mode. Defrost Mode : Lights up during Defrost Mode or Hot Start operation. -
Page 37: Name And Function-Remote Control (Cooling Models)
Operation Name and Function-Remote Control (Cooling Models) Remote Controller Signal transmitter. ON/OFF TIMER BUTTONS Used to set the time of starting and stopping operation. Transmits the signals to the room air conditioner. TIME SETTING BUTTONS Used to adjust the time. TIMER SET/CANCEL BUTTONS Signal transmitter Used to set the timer when the desired time is obtained... -
Page 38: Name And Function-Remote Control (Heat Pump Models)
Operation Name and Function-Remote Control (Heat Pump Models) Remote Controller ON/OFF TIMER BUTTONS Used to set the time of starting and stopping operation. Signal transmitter. Transmits the signals TIME SETTING BUTTONS to the room air conditioner. Used to adjust the time. TIMER SET/CANCEL BUTTONS Signal transmitter Used to set the timer when the desired time is obtained... -
Page 39: Disassembly
Disassembly Disassembly Indoor Unit Right side panel Disconnect the unit from power supply before mak- ing any checks. Be sure the power switch is set to “OFF”. 1. To remove the Grille from the Chassis. Remove the 2 screws of right side panel. Remove the front right side panel by the arrow. - Page 40 Disassembly Remove the grille from the chassis. • Remove the 4 securing screws.(30K, 32K) • Remove the 5 securing screws.(36K, 38K) • To remove the Grille, pull the lower left and right side of the grille toward you (slightly tilted) and lift it straight upward.
- Page 41 Disassembly 3. To remove the Control Box. Screw • Remove the 5 securing screws. • Pull the control box out from the chassis carefully. 4. To remove the Discharge Grille. • Remove the 3 securing screw. • Pressing the right side of the discharge grille downward slightly, unhook the discharge grille.
- Page 42 Disassembly 6. To remove the Fan motor • Loosen the screw securing the cross-flow fan to the fan motor (do not remove). Fan motor Screw • Loosen the screw securing the mount motor. Screw Mount motor • Separate the fan motor from the cross-flow fan. •...
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Page 43: Schematic Diagram
Schematic Diagram Schematic Diagram Heat Pump/Cooling Only Series(Indoor Unit) Service Manual 43... -
Page 44: Heat Pump Series (Outdoor Unit)
Schematic Diagram Heat Pump Series (Outdoor Unit) R02F R03F R04F R05F R06F 222*2 330uF 330nF 561*2 44 Room Air Conditioner... -
Page 45: Indoor Unit P.w.b. Assembly
Schematic Diagram INDOOR UNIT P.W.B. ASSEMBLY • P/No.: 6871A20558 (PCB ASSEMBLY, MAIN) TOP VIEW CN_MOTOR POLY_SW JP09 CN_HVB CN_TH2 CN_TH1 CN_U/D CN_L/R1 CN_L/R2 JP26 CN_DISP C07C BZ01E CN_12V CN_CON JP15 C02L JP17 CN_SW2 CN_COMM JP01 C02N PWB:6870A90224A OSC01B ASM:6871A20558 C13M IC10 C01C JP25... -
Page 46: Outdoor Unit P.w.b. Assembly
Schematic Diagram OUTDOOR UNIT P.W.B. ASSEMBLY TOP VIEW PWB : 6870A90250A ASM : 6871A10184 BOTTOM VIEW T A B - N Z N R 0 1 J F U S E C 0 3 J R Y _ C O M P ( A ) Z N R 0 3 J Z N R 0 2 J J 2 0... -
Page 47: Display P.w.b. Asm
Schematic Diagram DISPLAY P.W.B. ASM Model: LS301CE, LS301HE Service Manual 47... -
Page 48: Wiring Diagram
Schematic Diagram Wiring Diagram (1) Indoor Unit (Cooling Only Models, & Heating Models) 48 Room Air Conditioner... - Page 49 Schematic Diagram (2) Outdoor Unit • Cooling Only Models • Heating Models Service Manual 49...
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Page 50: Troubleshooting Guide
Troubleshooting Guide Troubleshooting Guide Refrigeration Cycle Diagram (1) Cooling Only Models INDOOR UNIT OUTDOOR UNIT Evaporator Line CAPILLARY TUBE HEAT HEAT EXCHANGER EXCHANGER (EVAPORATOR) (CONDENSER) Suction Line COMPRESSOR (2) Cooling & Heating Models INDOOR UNIT OUTDOOR UNIT CHECK VALVE Evaporator Line (Heating Model only) 3-WAY VALVE CAPILLARY TUBE... -
Page 51: Pipe Length And The Elevation
Troubleshooting Guide Pipe length and the elevation Pipe Size Standard Max. Max. Additional Capacity Length Elevation Length Refrigerant (Btu/h) LIQUID m(ft) B m(ft) A m(ft) g/m(oz/ft) 5/8" 3/8" 7.5(25) 15(50) 30(100) 30(0.32) (50Hz, 60Hz) Outdoor unit Outdoor unit Oil trap Indoor unit Indoor unit In case more than 5m (16.4ft) -
Page 52: 3-Way Valve
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 53 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 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 54 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 55 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-...
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Page 56: Gas Charging
Troubleshooting Guide 3. Gas Charging (After Evacuation) Liquid side Indoor unit Outdoor unit Open 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 57: Cycle Parts
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 58: 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 59: 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 60: 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 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 61: When Indoor Fan Does Not Operate
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 53 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 53 NECTOR Do the voltage of terminal of... -
Page 62: 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-UP/DOWN Connector •... -
Page 63: When A Comunication Error Occurs
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 64 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 65 Troubleshooting Guide OUTDOOR UNIT Connector Type Phenomena Condition • 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 66 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 MODELS No.
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Page 67: Exploded View
Exploded View Exploded View Indoor Unit 733010 342801 131410 352390-1 359011-1 342800 135311 359011-2 346810 352390-2 354210 35211B 268711-3 352150 146811 147581 567480 135313 249951 267110 135314 152313 135316 135315 Option Part 152302 268711-1 Service Manual 67... - Page 68 Exploded View 2. Outdoor Unit 435512 137213-1 137213-2 437210 554031 552111 435511 349600 435301 W0CZZ-1 W0CZZ-2 546810 567480-1 268711-3 559010 649950 Part for H/P Models 447910 552203-1 554160-1 552203-2 554160-2 567502 430410 550140-1 550140-2 68 Room Air Conditioner...
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Page 69: Replacement Parts List
Replacement Parts List Replacement Parts List Parts List(Indoor) PART NO. LOCATION DESCRIPTION REMARKS LS301CE LS301HE 131410 CHASSIS ASSEMBLY 3141A10001D 3141A10001D 135311 GRILLE ASSEMBLY, DISCHARGE(INDOOR) 3531A10056L 3531A10056L 135312 GRILLE ASSEMBLY, FRONT(INDOOR) 3531A10058B 3531A10058B 135313 GRILLE ASSEMBLY, INLET 3531A10060R 3531A10060R 135314 GRILLE, INLET... -
Page 70: 70 Room Air Conditioner
Replacement Parts List Parts List(Outdoor) PART NO. LOCATION DESCRIPTION REMARKS LS301CE LS301HE 137213-1 PANEL ASSEMBLY, SIDE 1A00202F 1A00202F 137213-2 PANEL ASSY, SIDE 1A00202C 1A00202C 263230 THERMISTOR ASSEMBLY 6323A20002L 6323A20002L 430410 BASE ASSY, OUTDOOR 3041AP2741L 3041AP2741L 435301 GRILLE, DISCHARGE 3530A20007J 3530A20007J... - Page 71 October, 2006 P/No.: 3828A20390S Printed in Korea...
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