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LG LS-L1260CL Service Manual
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LG LS-L1260CL Service Manual

LG LS-L1260CL Service Manual

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LG
LS-L1260CL
MODEL
SERVICE MANUAL

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Summary of Contents for LG LS-L1260CL

  • Page 1 LS-L1260CL MODEL SERVICE MANUAL...

  • Page 2: Indoor Unit

    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 •...

  • Page 3: Remote Controller

    Remote Controller Operation ON/OFF Operation Mode Selection Cooling Operation Mode.( Auto Operation Mode.( (Cooling (Heating Soft Dry 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 Down to 18°C Down to 16°C...

  • Page 4: Wiring Diagram

    Wiring Diagram (1) Indoor Unit 1. LS-L1260CL 2. LS-L1260HL POWER POWER FORCED FORCED MAIN PCB MAIN PCB OPERATION OPERATION AUTO AUTO RESTART RESTART TRIAC TRIAC REMOTE REMOTE CONTROL CONTROL MOTOR MOTOR THERMISTOR THERMISTOR STEP STEP SH-CAPA. SH-CAPA. MOTOR MOTOR FUSE AC250V/T2A RY-COMP.

  • Page 5: Operation Details

    Operation Details 1. MAIN UNIT FUNCTION • DISPLAY 1) C/O Model Operation Indicator • On while in appliance operation, off while in appliance pause • Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on) Sleep Timer Indicator •...

  • Page 6: Heating Mode Operation

    • While in compressor off, the indoor fan repeats low airflow speed and pause. • While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidifica- tion operation and 4-min compressor off repeat. Compressor ON Temp. Setting Temp+0.5°C Compressor OFF Temp.
  • Page 7 Fuzzy Operation (C/O Model) • According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on. Compressor ON Temp Setting Temp + 0.5°C Compressor OFF Temp...

  • Page 8: On-Timer Operation

    2) Fuzzy Operation for Dehumidification • According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.
  • Page 9 Off-Timer Operation • When the set time is reached after the time is input by the remote control, the appliance stops operating. • The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached. •...
  • Page 10 Jet Cool Mode Operation (C/O Model) • If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates. • In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation. •...
  • Page 11 Forced Operation (H/P Model) • To operate the appliance by force in case that the remote control is lost, the forced operation selection switch is on the main unit of the appliance to operate the appliance in the standard conditions. •...

  • Page 12: Display Function

    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 • Timer Mode •...
  • Page 13 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 • Timer Mode •...

  • Page 14: Installation Of Indoor, Outdoor Unit

    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 15: Indoor Unit Installation

    2) Indoor Unit Installation The mounting wall should be strong and solid enough to protect it from the vibration. Installation plate 1.Mount the installation plate on the wall with four Type "A" screws. (if mounting the unit on the concrete wall, consider using anchor bolts.) •...

  • Page 16: Piping And Drainage Of Indoor Unit

    2. 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 17 2) Connection of Pipings 1. Remove the tubing holder. 2. Route the drain hose and the indoor tubing. Tubing holder To remove the holder, press the bottom of chassis near the holder Pull upward and pull the tab For right rear piping out of its hole.
  • Page 18 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 19 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 Tubing holder pipe into the chassis.
  • Page 20 6. Wrap the insulation material around the connect- ing portion. CAUTION Take care to arrange the piping, drain hose and Taping cables as the figure 7 page for inserting it into the indoor unit and mount the indoor unit on the installa- Indoor/outdoor tion plate.

  • Page 21: Connecting The Piping To The Outdoor Unit

    3. 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 until the wrench clicks.
  • Page 22 2) Connection of the cable Outdoor unit 1. Remove the cover control from the unit by loos- ening the screw. Connect the wires to the terminals on the control board individually as the following. Terminal block (Pillar terminal) Over 5mm 1) Cooling only type Holder for power supply...

  • Page 23: Checking The Drainage

    4. 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 24 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 25: Form The Piping

    3) Form the piping 1. Wrap the connecting portion of indoor unit with 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 Drain hose...

  • Page 26: Air Purging Of The Piping And Indoor Unit

    5. Air Purging of the Piping and Indoor Unit 1) Air purging Terminal block The air remaining which contains moisture in the (pillar terminal) refrigeration cycle may cause a malfunction on the compressor. Gas side 1. Remove the caps from the 2-way and 3-way valves.
  • Page 27 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 28: Pipe Length And The Elevation

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

  • Page 29: Test Running

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

  • Page 30: Product Specifications

    Product Specifications SPEC. AT 230V Model Name LS-L1260CL LS-L1260HL Item Unit Cooling Capacity 12,000 12,000 Btu/h Heating Capacity 13,000 Moisture Removal Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz Indoor Air Circulation /min Outdoor Indoor Noise Level dB (A)¡ 3...
  • Page 31 Dimensions (1) Indoor Unit Installation plate MODEL 12K Btu Series Unit...
  • Page 32 (2) Outdoor Unit Gas side (3-way valve) Liquid side (2-way valve) MODEL 12K Btu Series unit...

  • Page 33: 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 34: Trouble Analysis

    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 35 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 36 2. The product is not operate with the remote control. 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 37 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 38: 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 39 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 40 6. 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 41 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.

  • Page 42: Electronic Control Device

    Electronic Control Device (1) MAIN P.C.B ASM PCB ASS'Y SVC PART LIST OPTIONAL FUNCTION MODEL P/NO OR1H OR2H OR3H OR4H OR5H OR6H LS-L1260CL 6871A20055S 6.8K OPEN 5.1K LS-L1260HL 6871A20055T 5.1K...

  • Page 43: Display Ass'y

    (2) Display Ass'y • LS-1260CL/HL(P/NO.:6871A30009C)

  • Page 44: Schematic Diagram

    Schematic Diagram Cooling Only Series...
  • Page 45 Heat Pump Series...

  • Page 46: Exploded View And Replacement Parts List

    Exploded View & Replacement Parts List 1. Indoor Unit (1) LS-L1260CL/HL...
  • Page 47 Parts List (LS-L1260CL/HL) Q/TY REMARKS PART NO. PART NAME LS-L1260CL LS-L1260HL 1H00843A PLATE INSTALLATION 3H03651A HOLDER, TUBE 4681A20003P MOTOR, BLOWER 3141A20003D CHASSIS ASM 5901AR6141B CROSS FLOW FAN 3H02821B BEARING ASM 5421A20031 EVAPORATOR ASM 5421A20032 EVAPORATOR 6711A20010 REMOTE CONTROL ASM 3H01420A...
  • Page 48 2. Outdoor unit L S - 1 2 6 0 C L / H L...
  • Page 49 Parts List (LS-L1260CL/HL) PART NAME PART No. L S - L 1 2 6 0 H C L L S - L 1 2 6 0 H L REMARK 3041A20008 BASE PAN W.ASM 4960A10002A MOUNT MOTOR 4681A20004H MOTOR,FAN 5901A10004A 1WPA0600014...

  • Page 50: Operation

    Operation (1) Name and Function-Remote Control (Cooling Models) Remote Control START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again. Signal transmitter ROOM TEMPERATURE SETTING BUTTONS Used to select the room temperature. Transmits the signals INDOOR FAN SPEED SELECTOR to the room air conditioner.

  • Page 51: Name And Function-Remote Control (Heat Pump Models)

    (2) Name and Function-Remote Control (Heat Pump Models) Remote Control START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again. Signal transmitter ROOM TEMPERATURE SETTING BUTTONS Used to select the room temperature. Transmits the signals to the room air conditioner.

  • Page 52: 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 53 2. To remove the Control Box. • Remove 2 securing screws. • Pull the control box out from the chassis carefully. 3. To remove the Discharge Grille. • Unhook the discharge grille and pull the discharge grille out from the chassis carefully. 4.
  • Page 54 • 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).