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LG LS-J0967HR Service Manual
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LG LS-J0967HR Service Manual

LG LS-J0967HR Service Manual

Lg room air conditioners service manual
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Summary of Contents for LG LS-J0967HR

  • Page 2: Table Of Contents

    Contents Functions ..........................3 Product Specifications ......................5 Dimensions ..........................7 Refrigeration Cycle Diagram ....................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 2-way, 3-way Valve ........................

  • 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 •...

  • Page 4: Remote Control

    Remote Control 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 9 (2) Outdoor Unit Gas side (3-way valve) Liquid side (2-way valve) 7K Btu MODEL 8K Btu 9K Btu(Cooling Only) unit...
  • Page 10 (3) Outdoor Unit (9K Btu Heat Pump) Gas side (3-way valve) Liquid side (2-way valve) MODEL 9K Btu Heat Pump unit...

  • Page 12: 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 15: 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 16: Defrost Control

    • 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 17 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 18 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 19: Sleep Timer Operation

    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 20 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 21 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 22: 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 23: Installation

    Installation 1. Installation of indoor, Outdoor unit 1) Selection of the best location • Select a place so that the warm air and noise from the air conditioner do not disturb neighbors. 1. Indoor unit • Do not have any heat or steam near the unit. More than 60cm •...
  • Page 24 3) How to fix installation plate 4) Drill a hole in the wall The wall you select should be strong and solid enough • Drill the piping hole with a ø70mm hole core drill. Drill to prevent vibration the piping hole at either the right or the left with the hole slightly slanted to the outdoor side.
  • Page 25 2. Flaring Work and Connection of Piping 1) Flaring work 4. Flaring work • Firmly hold copper pipe in a die in the dimension Main cause for refrigerant leakage is due to defect in shown in the table above. the flaring work. Carry out correct flaring work using the following procedure.
  • Page 26 2) Connection of piping Indoor 3. Tape the tubing, drain hose, and the connecting cable. Be sure that the drain hose is located at the • Preparing the indoor unit's piping and drain hose for lowest side of the bundle. Locating at the upper installation through the wall.

  • Page 27: For Left Rear Piping

    • Tighten the flare nut with a wrench. • Wrap the area which accommodates the rear piping housing section with vinyl tape. Open-end wrench (fixed) Indoor Connection unit pipe pipe Flare nut Vinyl tape Wrap with vinyl tape (wide) Connection pipe Wrench Connecting cable Indoor unit tubing...
  • Page 28 3. Insert the connecting cable into the indoor unit. Outside diameter Torque • Don't connect the cable to the indoor unit. kg . m inch • Make a small loop with the cable for easy connection Ø6.35 later. Ø9.52 Ø12.7 4.
  • Page 29 • Bundle the piping and drain hose together by wrap- Press the lower left and right sides of the unit against ping them with cloth tape over the range within which the installation plate until the hooks engage into their they fit into the rear piping housing section.
  • Page 30 3. Connecting The Cable Between Indoor Unit and Outdoor Unit 1) 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 in dividually according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the terminal No.
  • Page 31 2) Connect the cable to the outdoor unit Outdoor Unit 1. Remove the control cover from the unit by loos- Terminal block ening the screw. Connect the wires to the terminals on the control Over 5mm board individually. 2. Secure the cable onto the control board with the Connecting cable cord clamp.

  • Page 32: Checking The Drainage And Forming The Pipings

    4. Checking the Drainage and Forming the Pipings 1) Checking the drainage 2) Form the piping 1. To remove the front panel from the indoor unit. 1. Form the piping by wrapping the connecting por- • Set the air direction louvers up-and-down to the posi- tion of the indoor unit with insulation material and tion(horizontally) by hand.

  • Page 33: Test Running

    5. Test Running 1. Check that all tubing and wiring have been properly connected. Intake temperature 2. Check that the gas and liquid side service valves are fully open. Discharge air 1. Prepare remote control 1. Remove the battery cover by pulling it according to the Discharge arrow direction.

  • Page 34: Operation

    Operation Name and Function-Remote Control(C/O Model) START/STOP BUTTON Remote Control 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 35 Name and Function-Remote Control(H/P Model) START/STOP BUTTON Remote Control 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 36: 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 37 2. To remove the Control Box. • Remove securing screws. • Pull the control box out from the chassis careful- 3. To remove the Discharge Grille. • Unhook the discharge grille and pull the dis- charge grille out from the chassis carefully. 4.
  • Page 38 • 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 Motor Cover • Remove 2 securing screw. •...

  • Page 39: 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 40: 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 41: Pumping Down

    2. Pumping down Liquid side Indoor unit Open Outdoor unit 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 42 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 43 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 (3) Open the valve (Lo side) on the charge set and discharge the refrigerant until the gauge (1) Confirm that both the 2-way and 3-way valves indicates 0 kg/cm are set to the back seat.

  • Page 44: Vacuum Pump

    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 (4) Disconnect the charge hose from the vacuum pump. (1) Connect the vacuum pump to the charge set’s –...

  • Page 45: Gas Charging

    4. Gas Charging (After Evacuation) Liquid side Indoor unit Outdoor unit Open 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 46: 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 47: 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 48 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 49 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 50: 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 7, 10) •...
  • Page 51 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 52 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 53 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 54: Electronic Control Device

    Electronic Control Device (1) MAIN P.W.B ASSEMBLY (AC PART) • TOP VIEW (1) MAIN P.W.B ASM (AC) • BOTTOM VIEW...
  • Page 55 (2) MAIN P.W.B ASSEMBLY (DC PART) • TOP VIEW (2) MAIN P.W.B ASM (DC) • BOTTOM VIEW...
  • Page 56 (3) DISPLAY ASSEMBLY – 6871A20194 • TOP VIEW • BOTTOM VIEW – 6871A30009 • TOP VIEW • BOTTOM VIEW...

  • Page 57: Schematic Diagram

    Schematic Diagram -51-...
  • Page 60 Parts List LOCATION NO DESCRIPTION LS-J0766ML LS-J0965ML LS-J0965FR 131410 CHASSIS ASSY 3141A20001D 3141A20001D 3141A20001B 135311 GRILLE ASSEMBLY,DISCHARGE(INDO 3531A10120B 3531A10120B 3531A10074F 135314 GRILLE ASSY,INLET SUB 3531A10047F 135316 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A10102P 3531A10102F 3531A10086P 135516 COVER ASSEMBLY,MOTOR 3551A30054A 3551A30054A 3551A30054A 146811 MOTOR ASSEMBLY,STEP 4681A20055A 4681A20055A 4681A20055A 152302 FILTER(MECH),A/C...
  • Page 61 Parts List LOCATION NO DESCRIPTION LS-L1265ML LS-L1265FR 131410 CHASSIS ASSY 3141A20003B 3141A20003H 135311 GRILLE ASSEMBLY,DISCHARGE(INDO 3531A10121A 3531A10075F 135314 GRILLE ASSY,INLET SUB 3531A20059H 3531A10093D 135316 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A10099M 3531A10087P 135516 COVER ASSEMBLY,MOTOR 3551A30054C 3551A30054C 146811 MOTOR ASSEMBLY,STEP 4681A20055A 4681A20055A 152302 FILTER(MECH),A/C 5230A20004A 5230A20004A 152313...
  • Page 62 Parts List LOCATION NO DESCRIPTION LS-K1865ML LS-K1865FR LS-K2465ML LS-K2465FR 131410 CHASSIS ASSY 3141A20002H 3141A20002D 3141A20002H 3141A20002D 135311 GRILLE ASSEMBLY,DISCHARGE(INDO 3531A10124F 3531A10076F 3531A10124F 3531A10076F 135314 GRILLE ASSY,INLET SUB 3531A20062F 3531A10094D 3531A20062F 3531A10094D 135316 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A20065Y 3531A10088K 3531A20065Y 3531A10088K 135516 COVER ASSEMBLY,MOTOR 3551A30054E 3551A30054E 3551A30054G 3551A30054G 146811...
  • Page 63 2. Outdoor unit 437210 437212 552111 435511 554031 552102-1 5522201 559010 546810 552102-2 552111 W0CZZ 649950 552116 567502 552202 561410 554160 550140 552203-1 552203-2 430410...
  • Page 64 3. Outdoor unit • 9K Btu Heat Pump 437210 437212 554031 435511 546810 559010 649950 552102-1 552111 5522201 552102-2 552116 W0CZZ 552202 447910 561410 567502 554160 550140 552203-1 430410 552203-2...
  • Page 65 2. Outdoor unit 552102-1 552201 552111 552102-2 552202 561410 552116 552560 552203-2 552203-1 553000...
  • Page 66 Parts List LOCATION NO DESCRIPTION LS-J0766ML LS-J0965FR LS-J0965ML 430411 BASE ASSY,WELD[OUTDOOR] 3041A20016A 3041A20016A 3041A20016A 435511 COVER ASSEMBLY,CONTROL(OUTDOOR) 3551A30058F 3551A30058C 3551A30058C 435512 COVER ASSY,TOP(OUTDOOR) 3551A20034A 3551A20034A 3551A20034A 437210 PANEL ASSY,FRONT(OUTDOOR) 3721A20060B 3721A20060B 3721A20060B 437212 PANEL ASSY,REAR(OUTDOOR) 3721A20059A 3721A20059A 3721A20059A 447910 BARRIER ASSY,OUTDOOR 4791A20011A 4791A20011A 4791A20011A...
  • Page 67 Parts List LOCATION NO DESCRIPTION LS-L1265ML LS-L1265FR LS-K1865ML 430411 BASE ASSY,WELD[OUTDOOR] 3041A20008J 3041A20008J 3041A30003F 435511 COVER ASSEMBLY,CONTROL(OUTDOOR) 3551A30058A 3551A30058A 3551A30018U 435512 COVER ASSY,TOP(OUTDOOR) 3H03266K 437210 PANEL ASSY,FRONT(OUTDOOR) 3721A20027B 3721A20027B 3721A20005B 437212 PANEL ASSY,REAR(OUTDOOR) 3721A20026A 3721A20026A 3720AP0003D 447910 BARRIER ASSY,OUTDOOR 4791A30002A 4791A30002A 2H02110A 546810 MOTOR ASSEMBLY,OUTDOOR...
  • Page 68 Parts List LOCATION NO DESCRIPTION LS-K1865FR LS-K2465ML LS-K2465FR 430410 BASE ASSEMBLY,WELD[OUTDOOR] 3041A30003F 3041A20022E 3041A20022E 435511 COVER ASSEMBLY,CONTROL(OUTDOOR)3551A30018U 3551A30018U 3551A30018U 435512 COVER ASSEMBLY,TOP(OUTDOOR) 3H03266K 3H03266K 3H03266K 437210 PANEL ASSEMBLY,FRONT(OUTDOOR) 3721A20005B 3721A20005B 3721A20005B 437212 PANEL ASSY,REAR 3720AP0003D 3720AP0003D 3720AP0003D 447910 BARRIER ASSY,OUTDOOR 2H02110A 2H02110A 2H02110A...
  • Page 69 Parts List LOCATION NO DESCRIPTION LS-J0967HR LS-L1267HR LS-K186GHR LS-K246GHR 268714 PWB(PCB) ASSEMBLY,SUB 6871A20130J 6871A20130J 6871A20130J 6871A20130J 430410 BASE ASSY,OUTDOOR 3041A20008K 3041A20008K 3041A20022E 3041A20022E 435511 COVER ASSEMBLY,CONTROL(OUTDOOR)3551A30058B 3551A30058B 3551A30018V 3551A30018V 437210 PANEL ASSY,FRONT(OUTDOOR) 3721A20027A 3721A20027B 3721A20005B 3721A20005B 437212 PANEL ASSY,REAR(OUTDOOR) 3721A20026B...
  • Page 70 May, 2002 Printed in Korea...

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