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LG LS-E0960CL Service Manual
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LG LS-E0960CL Service Manual

Room air conditioner
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Room Air Conditioner

SERVICE MANUAL

MODEL : LS-E0960CL/CM/CD
LS-E0960HL/HM/HD
LS-F1260CL/CM/CD
LS-F1260HL/HM/HD

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Summary of Contents for LG LS-E0960CL

  • Page 1: Room Air Conditioner

    Room Air Conditioner SERVICE MANUAL MODEL : LS-E0960CL/CM/CD LS-E0960HL/HM/HD LS-F1260CL/CM/CD LS-F1260HL/HM/HD...

  • Page 2: Table Of Contents

    Contents Functions ..........................3 Product Specifications (Cooling Only) .................. 5 Product Specification (Cooling & Heating) ................6 Dimensions ..........................7 Refrigeration Cycle Diagram ....................10 Wiring Diagram ........................11 Operation Details ........................13 Display Function ........................21 Self-diagnosis Function ......................21 Installation ..........................

  • Page 3: 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 Restarting is inhibited for approx.

  • Page 4: Remote Controller

    Remote Controller Operation ON/OFF Operation Mode Selection Cooling Operation Mode ( Auto Operation Mode Soft Dry Operation Mode ( Heating Operation Mode ( (Cooling model only) (Heating model only) Fan Speed Selection (Low) (Med) (High) (CHAOS) Room, Temperature Display : High: 39°C LOW : 11°C Temperature Setting HIGH...

  • Page 5: Product Specifications (Cooling Only)

    Product Specifications (Cooling Only) SPEC. AT 240V Model Name 9K Btu 12K Btu Cooling Only Cooling Only Item Unit Cooling Capacity Btu/h 8,700 12,000 Moisture Removal Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz Indoor Air Circulation /min Outdoor Indoor Noise Level dB (A) 1 Outdoor...

  • Page 6: Product Specification (Cooling & Heating)

    Product Specifications (Cooling & Heating) SPEC. AT 240V Model Name 9K Btu 12K Btu Cooling & Heating Cooling & Heating Item Unit Cooling Capacity 8,500 12,000 Btu/h Heating Capacity 9,300 12,500 Moisture Removal Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz Indoor Air Circulation /min...

  • Page 7: Dimensions

    Dimensions (1) Indoor Unit ( 9K, 12K ) Tubing hole cover Installation plate Installation plate ( 9K ) ( 12K ) Left rear piping Right rear piping Left rear piping Right rear piping 80mm Center Center 50mm ( 9K ) ø70mm ø70mm ø70mm...
  • Page 8 (2) Outdoor Unit ( 9K, 12K) Gas side (3-way valve) Liquid side (2-way valve) MODEL 9K Btu Cooling & Heat Pump 12K Btu Cooling Only unit...
  • Page 9 (3) Outdoor Unit(12K Heat Pump) Liquid side 2-way valve Gas side 3-way valve MODEL 12K Btu Heat Pump unit 543.6 11.4 72.5 86.4...

  • Page 10: Refrigeration Cycle Diagram

    Refrigeration Cycle Diagram INDOOR UNIT OUTDOOR UNIT CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILLARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE REVERSING 3-WAY VALVE ACCUMU VALVE LATOR (Heating Model Only) COOLING COMPRESSOR HEATING MAX. Pipe size(Diameter:Ø) MODEL Piping length Elevation...

  • Page 11: Wiring Diagram

    Wiring Diagram (1) 9K, 12K, Btu Cooling Only 1. Indoor Unit 2. Outdoor Unit POWER COMP. MOTOR MOTOR THERMISTOR BL BL SH-CAPA STEP MOTOR UP/DOWN CAPACITOR RY-COMP STEP GN/YL SUPPORT MOTOR VALVE LE/RI MAIN PCB TERMINAL 1(L) 2(N) BLOCK CN-DISP PILLAR 1(L) 2(N) TERMINAL...

  • Page 12: Indoor Unit

    (2) 9K, 12K Btu Cooling & Heating 1. Indoor Unit POWER MAIN PCB GN/YL MOTOR THERMISTOR SH-CAPA STEP MOTOR RY-COMP STEP MOTOR RY-4WAY RY-FAN CN-DISPLAY PILLAR 1(L) 2(N) TERMINAL DISPLAY PCB ASM INDOOR WRING DIAGRAM 3854AR6093C TO OUTDOOR UNIT 2-1. Outdoor Unit (9K) 2-2.

  • Page 13: Operation Details

    Operation Details 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 4. Soft Dry Operation Mode • During Soft Dry Operation, the compressor ON temperature is the setting temperature plus 0.5°C, the com- pressor OFF temperature is the setting temperature minus 0.5°C. • When the room temperature rises over the compressor ON temperature, the operation mode is switched to the Cooling operation.

  • Page 15: Auto Operation

    6. Auto Operation • The operation procedure is as following. Press Start/Stop Button Select Auto Operation Mode Check the Room temperature Operation mode Indoor fan speed are automatically decided by Fuzzy rule. Setting temperature Intake-air Over below below 21°C Over 24°C temperature 21°C 24°C...

  • Page 16: Heating Mode Operation

    Auto Operation for Soft Dry The Setting temperature will be same that of auto operation for Cooling. - Compressor ON temperature; Setting temperature +0.5°C - Compressor OFF temperature; Setting temperature -0.5°C Auto Operation for Heating Intake Air temp. below 20°C Over 20°C~below 21°C Setting temp.
  • Page 17 8. Hot-Start Control • The indoor fan stops until the evaporator piping temperature will be reached at 28°C. • The operation diagram is as following. PIPE TEMP. 28 C 60 sec. INDOOR SELECTING FAN SPEED FAN SPEED COMPRESSOR HOT-START BY TEMPERATURE -17-...
  • Page 18 9. Deice Control Deicing operation is controlled by timer and sensing the indoor pipe temperature. Deicing operation checks the indoor pipe temperature and Intake-air temperature at 25 minutes and 60 minutes on starting of heating operation, and discriminates by temperature difference. When the heating operation passed 25 minutes, the temperature ( T1=TE1–TR1) is checked and memorized with checking the indoor pipe temperture (TE1) and the indoor Intake-air temperature (TR1).
  • Page 19 10. Natural Wind by CHAOS Logic There are common rules in the irregular changes amid the breeze of highlands and valleys, the sound of streams, the songs of birds in the forest and brain waves of relaxation. Mmm... the breath-taking and touchy feeling of wind from the deep mountains and dark valleys. Through analysis in its chaos simulator, Goldstar has successfully created such a feeling of freshness and serenity by analyzing the frequency of natural wind.

  • Page 20: Forced Operation

    11. Forced Operation • If you lose wireless remote controller, you can operate the unit with forced operation switch. • The standard conditions are as following. Room Temp 24°C 24°C > Room Temp 21°C Room Temp<21°C Operation Mode Cooling Soft Dry Heating FAN Speed High...

  • Page 21: Display Function

    Display Function 1. Heating Model 2. Cooling Model Operation Indicator Operation Indicator • Cooling, Soft Dry, Fan, Heating • Cooling, Soft Dry, Fan Timer Indicator Timer Indicator • Timer Mode • Timer Mode Sleep Timer Indicator Sleep Timer Indicator • Sleep Mode •...

  • Page 22: Installation

    Installation 1. Installation of indoor, Outdoor unit 1) Selection of the best location 1. Indoor unit There should not be any heat source or steam • near the unit. More than 5 cm More than • There should not be any obstacles to prevent the 5 cm air circulation.
  • Page 23 2) Indoor Unit Installation The mounting wall should be strong and solid enough to protect it from the vibration. 1.Mount the installation plate on the wall with four Installation plate Type "A" screws. (if mounting the unit on the concrete wall, consider using anchor bolts.) •...

  • Page 24: Piping And Drainage Of Indoor Unit

    3. Piping and Drainage of Indoor Unit 1) Preparation of Piping Pipe cutter 1. Cut the pipes and the cable. • Use the accessory piping kit or the pipes pur- chased locally. Slanted Rough • Measure the distance between the indoor and the outdoor unit.

  • Page 25: For Right Rear Piping

    2) Connection of Pipings Installation plate 1. Remove the installation plate • Pull the two ' ' marked portion of bottom of the chassis and pull the installation plate out of chas- sis. Pull * ( : 9K Btu Models only) Pull 2.
  • Page 26 5. Bend the tubing as shown in the figure and bind the piping, the connecting cables and the drain hose altogether. • Make a small loop for easy connection later. 6. Wrap the tubing, the drain hose and the con- necting cable with tape.

  • Page 27: For Left Rear Piping

    For left rear piping Installation plate 3. Insert the connecting cables, the drain pipe and connecting piping through the piping hole on the wall. Pull Pull 4. Connect the piping and the indoor tubing, and drain hose and drain pipe and place the drain pipe into the chassis.
  • Page 28 6. Wrap the insulation material around the connect- ing portion. CAUTION Taping Take care to arrange the piping, drain hose and cables as the figure 7 page for inserting it into the Indoor/outdoor indoor unit and mount the indoor unit on the installa- connecting cable tion plate.
  • Page 29 4. Connecting Piping and Cable to the outdoor unit 1) Connecting the piping to the Outdoor unit 1. Align the center of the piping and sufficiently tighten the flare nut with fingers. 2. Finally, tighten the flare nut with torque wrench Outdoor unit Liquid side piping until the wrench clicks.
  • Page 30 2) Connection of the cable Outdoor unit 1. Remove the cover control from the unit by loosen- ing the screw. Connect the wires to the terminals on the control Terminal block (Pillar terminal) board individually as the following. Over 5mm 1) Cooling only type Holder for power supply...
  • Page 31 5. Checking the Drainage and Connecting the cable to Indoor unit 1) Checking the Drainage 1. Remove the Grille from the cabinet. • Set the up-and-down air direction louver to the open position (horizontally) by finger pressure. • Remove the securing screws. •...
  • Page 32 2) Connecting of the cable to the indoor unit 1. Connect the wires to the terminals on the con- trol board individually according to the out- door unit connection. • Ensure that the color of the wires of outdoor unit and the terminal No. are the same as the indoor unit.
  • Page 33 3) Forming the pipings Seal a small opening 1. Wrap the connecting portion of indoor unit with around the pipings with gum type sealer. the Insulation material and secure it with two Plastic Bands.(for the right piping) • If you want to connect an additional drain hose, the end of the drain-outlet should be off the Taping ground.(Do not dip it into water, and fix it on the...

  • Page 34: Air Purging Of The Piping And Indoor Unit

    6. Air Purging of the Piping and Indoor Unit 1) Air purging Cover control The air remaining which contains moisture in the Terminal block (pillar terminal) refrigeration cycle may cause a malfunction on the compressor. 1. Remove the caps from the 2-way and 3-way valves.
  • Page 35 8. Checking a gas leakage (1) Connect the manifold gauge to the service port of 3-way valve. Measure the pressure. (2) Keep it for 5-10 minutes. Ensure if the pressure indicated on the gauge is as same as that of measured at first time. Liquid side Indoor unit Outdoor unit...

  • Page 36: Pipe Length And The Elevation

    7. Pipe length and the elevation Max. Max. Piping Additional Refrig- Capacity Standard Elevation Length erant Length(m) (Btu/h) (g/m) 7~12K 30(20) 15(10) 4 or 5 24K~30K 4 or 5 Outdoor unit Outdoor unit Oil trap Indoor unit Indoor unit In case more than 5m CAUTION •...

  • Page 37: Test Running

    8. Test running 1) Connection of power supply 1. Connect the power supply cord to the inde- RESET pendent power supply. • Circuitbreaker is required. 2. Prepare the remote controller. Battery cover • Insert two batteries provided. Remove the battery cover from the remote con- troller.

  • Page 38: Operation

    Operation (1) Name and Function-Remote Control (Cooling Models) Remote Controller Signal transmitter. Operation display Displays the operation conditions. Transmits the signals Start/Stop Button to the room air conditioner. Operation starts when this button is pressed, and stops when the button is pressed again. Operation Mode Selection Button Used to select the operation mode.
  • Page 39 (2) Name and Function-Remote Control (Heat Pump Models) Remote Controller Signal transmitter. Operation display Displays the operation conditions. Transmits the signals to the room air conditioner. Start/Stop Button Operation starts when this button is pressed, and stops when the button is pressed again. Operation Mode Selection Button Used to select the operation mode.

  • Page 40: 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”. To remove the Grille from the Chassis. • Set the up-and-down air discharge louver to open position (horizontally) by finger pressure.
  • Page 41 2. To remove the Control Box. • Remove 2 or 4 securing screws. • Pull the control box out from the chassis carefully. 3. To remove the Discharge Grille. • Remove the securing screw. • Pressing the right side of the discharge grille downward slightly, unhook the discharge grille.
  • Page 42 • Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporator toward you until the tab is clear of the slot. 5. To remove the Cross-Flow Fan • Loosen the screw securing the cross-flow fan to the fan motor (do not remove).

  • Page 43: 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 44: Air Purging

    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 45: 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 46 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 47 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 (1) Confirm that both the 2-way and 3-way valves are set to the back seat. (2) Connect the charge set to the 3-way valve’s port.
  • Page 48 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 (1) Connect the vacuum pump to the charge set’s center hose (2) Evacuation for approximately one hour. –...

  • Page 49: 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 50: 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 51: 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 52 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 53 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 54: 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 SSR(the input and output signal of IC01M, PIN NO 2, 15) •...
  • Page 55 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 56 6. When Heating does not operate Turn ON Main Power Operate “Heating Mode( )” by setting the desired temperature of the remote controller 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 57 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. -57-...

  • Page 58: Electronic Control Device

    Electronic Control Device (1) MAIN P.C.B ASM PCB ASS'Y SVC PART LIST OPTIONAL FUNCTION MODEL P/NO LS-E0960CL(S) 6871AQ2420A OPEN LS-F1260CL(S) 6871AQ2420B OPEN 6.8K LS-E0960HL(S) 6871AQ2420C OPEN 5.1K LS-F1260HL(S) 6871AQ2420D OPEN 5.1K 6.8K -58-...
  • Page 59 (2) Display Ass'y (P/No.: 6871AQ3265A) -59-...

  • Page 60: Schematic Diagram

    Schematic Diagram 9K, 12K Btu Cooling Only Series -60-...
  • Page 61 9K, 12K Btu Heat Pump Series -61-...

  • Page 62: Exploded View & Replacement Parts List

    Exploded View & Replacement Parts List 1. Indoor Unit (9K Btu Series) -62-...
  • Page 63 Parts List (9K Btu Series) Q/TY PART NAME REMARKS PART NO. Heat Pump Cooling Only 3300AR1367A PLATE INSTALLATING 4930AR4181A HOLDER, TUBE 4681AR2659Q MOTOR ASSY BLOWER 3141AR2680B CHASSIS ASSY 5835AR2034B BLOWER ASSY 3H02821A BEARING ASM 5421AR2696 EVAPORATOR ASM 5420AR3821C EVAPORATOR 5211AR2695 TUBE ASSY 6711AR2664 REMOTE CONTROLLER ASM...
  • Page 64 2. Indoor Unit (12K Btu Series) -64-...
  • Page 65 Parts List (12K Btu Series) Q/TY PART NO. PART NAME REMARKS Cooling Only Heat Pump 1H00843A PLATE INSTALLATING 4930AR4181A HOLDER, TUBE 3H03652A COVER TUBE 4681AR2659R MOTOR ASSY BLOWER 3141AR2656B CHASSIS ASSY 5901AR2441A BLOWER ASSY 3H02821A BEARING ASM 5421AR2682E EVAPORATOR ASM 2H02449C 5211AR7139A TUBE ASSY...
  • Page 66 2. Outdoor Unit(9K, 12K Btu Series) -66-...
  • Page 67 Parts List (9K, 12K Outdoor Unit) Q/TY PART NO. Cooling Only Heat Pump Cooling Only 3041AR2205 BASE ASSY, WELD 4960AR1356A MOUNT, MOTOR 4681AR1392 MOTOR, ASSY FAN 5900AR1119A 1WPA0800014 PLAIN WASHER 4H02861A FAN NUT 4908AR2610A SUPPORT, VALVE 5403AR2660 CONDENSER ASSY 2H02466 COMPRESSOR 5417AR2760 4984AR4361A...
  • Page 68 3. Outdoor Unit(12K Btu Heat Pump) -68-...
  • Page 69 3. Outdoor Unit(12K Btu Series) Q,TY PARTS NAME PART No. 12K Btu REMARK Heat Pump BASE PAN W. ASM 2H02079 COMPRESSOR 5417AR2256A O.L.P(OVER LOAD PROTECTOR) 6750-CL005A 3550-CL001C TERMINAL COVER 3550U-L002D NUT TERMINAL COVER 4H00947A ANTI VIBRATION BUSH 4H00982E WASHER 4H00972D HEXAGON NUT-1 1NHA0801206 SUPPORT VALVE...
  • Page 70 July, 1998 P/No.: 3828AR7190L Printed in Korea...

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