Related Manuals for LG LS300CE
Summary of Contents for LG LS300CE
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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 : LS300CE... -
Page 2: Table Of Contents
Contents Details of LG Model Name (2004) ..................3 Functions ..........................4 Product Specifications ......................6 Dimensions ..........................7 Refrigeration Cycle Diagram ....................9 Pipe Length and the Elevation .....................10 Wiring Diagram ........................11 Operation Details ........................13 Display Function ........................20 Self-diagnosis Function ......................20 Installation ..........................21 Operation ..........................37 Disassembly of the parts (Indoor Unit) ................39... -
Page 3: Details Of Lg Model Name (2004)
Details of LG Model Name(2004) 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: 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 seconds at the starting. Time Delay Safety Control •... -
Page 5: Remote Controller
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:39°C Low:11°C) Temperature Setting HIGH TEMPERATURE Down to 18°C... -
Page 6: Product Specifications
Product Specifications(Cooling Only) Items Unit LS300CE Power Supply ø, V, Hz 1, 208/230, 60 Cooling Capacity BTU/h 27,000/28,000 Input 3,450/3,600 Running Current 16.5/16.0 COMP. Locked Rotor AMP. A: 68. B: 29 E.E.R BTU/hW 7.79/7.81 Air Circulation /min(cfm) 21(740) Moisture Removal l/h(pts/hr) 3.7(7.8) -
Page 7: Dimensions
Dimensions (1) Indoor Unit Tubing hole cover Tubing hole cover Installation plate Model 30K SERIES Dimension 1,259(49.6) mm(inch) 349(13.7) mm(inch) 205(8.1) mm(inch) - 7 -... - Page 8 (2) 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)
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Page 9: Refrigeration Cycle Diagram
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 HEAT... -
Page 10: Pipe Length And The Elevation
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) CAUTION... -
Page 11: Wiring Diagram
Wiring Diagram (1) Indoor Unit (Cooling Only Models, & Heating Models) WIRING DIAGRAM CN-MOTOR TRIAC MOTOR SH-CAPA. THERMISTOR STEP MOTOR (UP/DOWN) H.V.B ASM CN-POWER STEP MOTOR (L/R) FUSE AC250V/T2A Negative ion LIMITS S/W STEP MOTOR (L/R) OPTION PILLAR CN-DISP 3(L1) 4(L2) TERMINAL DISPLAY PCB ASM TO OUTDOOR UNIT... - Page 12 (2) Outdoor Unit • Cooling Only Models WIRING DIAGRAM CN-CON CN-POWER 4(L2) PIPE-IN 3(L1) TEMP-IN FUSE(250V,3A) GN/YL 2(L2) 1(L1) MAIN PCB ASM COIL EXPANSION CN-COMP CN-FAN CAPACITOR(A) CAPACITOR(B) YL BR Comp(B) Comp(A) 3854A20153W • Heating Models WIRING DIAGRAM REVERSING VALVE CN-POWER CN-CON 4(L2)
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Page 13: Operation Details
Operation Details (1) 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 14 . 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 15 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 16 5. Healthy Dehumidification • When the dehumidification operation input by the remote control 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 25°C 24°C ≤...
- Page 17 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 18 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 19: Forced 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 20: Display Function
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 21: Installation
Installation 2. Outdoor unit Read completely, then follow step by step. If an awning is built over the unit to prevent direct sunlight or 1. Installation of Indoor, rain exposure, make sure that heat radiation from the con- Outdoor unit denser is not restricted. - Page 22 3) How to fix installation plate 4) 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.
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Page 23: Flaring Work And Connection Of Piping
2. Flaring Work and Connection of Piping 1) Flaring work 4. Flaring work Carry out flaring work using flaring tool as shown Main cause for gas leakage is due to defect in flar- below. ing work. Carry out correct flaring work in the follow- ing procedure. - Page 24 2) Connection of piping-Indoor CAUTION When install, make sure that the 1. Remove the 2 screws of right side panel. 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 25 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. Be sure that the drain hose is located at the hose to drain pipe.
- Page 26 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. together with vinyl tape so that there is no gap.
- Page 27 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 plate.) Ensure that the hooks are properly seated...
- Page 28 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 29: Outdoor Unit
3) Connection of the drain hose 4) Connection of piping-Outdoor The drain hose can be connected at two different positions. Use the most convenient position and, if 1. Align the center of the pipings and sufficiently tighten the flare nut by hand. necessary, exchange the position of the drain pan, rubber cap and the drain hose. - Page 30 3. Connecting the cable between indoor unit and outdoor unit 1) Connect the cable to the indoor unit by CAUTION connecting the wires to the terminals on the control board individually according to The power supply cord connected to the outdoor the outdoor unit connection.
- Page 31 2) Connect the cable to the outdoor unit Outdoor Unit 1. Remove the control cover from the unit by loosen- Terminal block ing the screw. Connect the wires to the terminals on the control board individually. Over 5mm 2. Secure the cable onto the control board with the cord clamp.
- Page 32 1) 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 33 2) Form the piping 3. In cases where the Outdoor unit is installed above the Indoor unit perform the following. 1. Form the piping by wrapping the connecting por- Tape the piping and connecting cable from down tion of the indoor unit with insulation material and to up.
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Page 34: Air Purging
4. AIR PURGING Do a leak test of all joints of the tubing(both indoor and outdoor) and both gas and liquid side service valves. 1) Air purging Bubbles indicate a leak. Be sure to wipe off the Air and moisture remaining in the refrigerant system soap with a clean cloth. - Page 35 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 36: Test Running
5. TEST RUNNING 3. Ensure the difference between the intake temper- ature and the discharge is more than 8°C 1. Check that all tubing and wiring have been prop- (Cooling) or reversely (Heating). erly connected. 2. Check that the gas and liquid side service valves Intake temperature are fully open. -
Page 37: Operation
Operation (1) Name and Function-Remote Control (Cooling Models) Remote Controller Signal transmitter. Transmits the signals to the room air conditioner. ON/OFF TIMER BUTTONS Signal transmitter Used to set the time of starting and stopping operation. TIME SETTING BUTTONS Used to adjust the time. TIMER SET/CANCEL BUTTONS Used to set the timer when the desired time is obtained and to cancel the Timer operation. - Page 38 (2) Name and Function-Remote Control (Heat Pump Models) Remote Controller Signal transmitter. Transmits the signals to the room air conditioner. ON/OFF TIMER BUTTONS Signal transmitter Used to set the time of starting and stopping operation. TIME SETTING BUTTONS Used to adjust the time. TIMER SET/CANCEL BUTTONS Used to set the timer when the desired time is obtained and to cancel the Timer operation.
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Page 39: Disassembly Of The Parts (Indoor Unit)
Disassembly of the parts (Indoor unit) Warning : Right side panel 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. Remove the 2 screws of right side panel. Remove the front right side panel by the arrow. - Page 40 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 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 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: 3-Way Valve
3-way Valve 1. Pump down Liquid side Indoor unit Outdoor unit Open 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 44 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 45 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 46 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 47: Gas Charging
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 48: 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 49: 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 50 2. 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 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 tempera- ture of Heat Exchanger(EVA).
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Page 52: When Indoor Fan Does Not Operate
4. 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 2, 15) •... - Page 53 5. 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 Check the connector of intake and pipe sensor(thermistors) • Check the related circuit of R02H(12.1K), R04H(6.2K), R03H(1.0K), Micom(No. 3, 4). • Check the indoor room temperature is disconnected or not (about 10KΩ/at 25°C). • Check the indoor pipe temperature is disconnected or not (about 5KΩ/at 25°C).
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Page 55: Electronic Control Device
Electronic Control Device (1) INDOOR UNIT P.W.B. ASSEMBLY P/No.: 6871A10153 (PCB ASSEMBLY, MAIN) - 55 -... - Page 56 (2) OUTDOOR UNIT P.W.B. ASSEMBLY TOP VIEW BOTTOM VIEW - 56 -...
- Page 57 (3) DISPLAY P.W.B. ASM - 57 -...
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Page 58: Schematic Diagram
Schematic Diagram (1) Indoor Unit - 58 -... - Page 59 (2) Outdoor Unit R02F R03F R04F R05F R06F - 59 -...
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Page 60: Exploded View And Replacement Parts List
Exploded View and Replacement Parts List 1. Indoor Unit 733010 342801 131410 352390-1 359011-1 342800 135311 359011-2 346810 146811-2 352390-2 354210 135301 35211B 268714 352150 146811-1 159901 263230 135313 W0CZZ 249951 267110 152302 135314 152313 135312 135315 152302 268712 - 60 -... - Page 61 Parts List(Indoor) PART NO. LOCATION DESCRIPTION LS300CE 131410 CHASSIS ASSEMBLY 3141A10001D 135311 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A10056L 135312 GRILLE ASSEMBLY,FRONT(SINGLE) 3531A10250M 135313 GRILLE ASSEMBLY,INLET 3531A10060M 135314 GRILLE,INLET 3530A20087A 135315 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A10058V 146811-1 MOTOR ASSEMBLY,STEP 4681AR2727B 146811-2 MOTOR ASSEMBLY,STEP 4681AP2632H 147582 LOUVER,VERTICAL...
- Page 62 2. Outdoor Unit 435512 137213-1 137213-2 437210 554031 552111 435511 549610 552201 435301 W0CZZ-1 W0CZZ-2 546810 263230 668711 559010 649950 552116 552202 447910 561410 552203-2 554160-1 566000 552203-1 554160-2 567502 430410 550140-1 550140-2 - 62 -...
- Page 63 Parts List(Outdoor) PART NO. LOCATION DESCRIPTION LS300CE 137213-1 PANEL ASSEMBLY,SIDE 1A00202F 137213-2 PANEL ASSEMBLY,SIDE 3A02284U 263230 THERMISTOR ASSEMBLY 6323A20002L 430410 BASE ASSY,OUTDOOR 3041AP2741L 435301 GRILLE,DISCHARGE 3530A20007J 435511 COVER ASSY,CONTROL(OUTDOOR) 3551AR7184T 435512 COVER ASSEMBLY,TOP(OUTDOOR) 3H03266H 437210 PANEL ASSY,FRONT SUB 2A01041M 447910...
- Page 64 May, 2004 P/No.: 3828A20390R Printed in Korea...