Related Manuals for LG LT-E1860FJ/FH
Summary of Contents for LG LT-E1860FJ/FH
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Page 1: Service Manual
Ceiling Cassette Air Conditioner SERVICE MANUAL MODELS: LT-E1860FJ/FH LT-E2460FJ/FH LT-D2860RJ/RH/FJ/FH LT-D3681RJ/RH/FJ/FH LT-D4881RJ/RH/FJ/FH... -
Page 2: Table Of Contents
Contents Model Identification .........................3 Functions ..........................4 Product Specifications (Cooling & Heating) ................6 Dimensions ..........................9 Refrigeration Cycle Diagram ....................13 Wiring Diagram ........................14 Operation Details ........................18 Installation of Indoor, Outdoor Unit ..................21 Cycle ............................36 Cycle Troubleshooting Guide ....................39 Electronic Parts Troubleshooting Guide ................40 Electronic Control Device .....................43 Schematic Diagram .......................44 Exploded View and Replacement Parts List ...............45... -
Page 3: Model Identification
6 : 220~240V /50Hz / 1ø Cooling/Heating Capacity 18: 18,000 Btu/hr 36: 36,000 Btu/hr 24: 24,000 Btu/hr 48: 48,000 Btu/hr 28: 28,000 Btu/hr Chassis Type D : D Chassis E : E Chassis Type of Air Conditioner LT: LG Ceiling Cassette Type Air Conditioner –3–... -
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. • Indoor fan is delayed for 5 seconds at the starting. Starting Current Control •... -
Page 5: Remote Controller
Remote Controller Operation ON/OFF Operation Mode Selection Cooling Operation Mode ( Soft Dry Operation Mode ( Heating Operation Mode ( Auto Operation Mode ( (Cooling (Heating model only) model only) Fan Speed Selection AUTO (Low) (Med) (High) Room Temperature Display : High:39°C ↔... -
Page 6: Product Specifications (Cooling & Heating)
Product Specifications (Cooling & Heating) LT-E1860FJ LT-E2460FJ Model LT-E1860FH LT-E2460FH 1, 220-240, 50 1, 220-240, 50 Power Supply ø, V, Hz 4,536(5,274) 5,872(6,892) Capacity Cooling kcal/h(W) 18,000 23,300 Btu/h Heating kcal/h(W) Btu/h 2,050 2,800 Input Cooling Heating 12.5 Running Current Cooling Heating 2.57... - Page 7 LT-D2860RJ LT-D2860FJ Model LT-D2860RH LT-D2860FH 1, 220-240, 50 1, 220-240, 50 Power Supply ø, V, Hz 7,056(8,206) 7,056(8,206) Capacity Cooling kcal/h(W) 2,800 2,800 Btu/h 7,056(8,206) Heating kcal/h(W) 2,800 Btu/h 2,800 2,900 Input Cooling 2,580 Heating 12.8 Running Current Cooling 11.9 Heating 2.93 2.83...
- Page 8 LT-D3681RJ LT-D3681FJ LT-D4881RJ LT-D4881FJ Model LT-D3681RH LT-D3681FH LT-D4881RH LT-D4881FH 3, 380-415, 50 3, 380-415, 50 3, 380-415, 50 3, 380-415, 50 Power Supply ø, V, Hz 9,073(10,550) 9,073(10,550) 12,096(14,065) 12,096(14,065) Capacity Cooling kcal/h(W) 36,000 36,000 48,000 48,000 Btu/h 9,073(10,500) 12,096(14,065) Heating kcal/h(W) 36,000...
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Page 9: Dimensions
Dimensions (1) Indoor Unit • Model : LT-E1860FJ/FH, LT-E2460FJ/FH CLOSE OPEN OPEN CLOSE –9–... - Page 10 • Model : LT-D2860RJ/RH, LT-D2860FJ/FH LT-D3681RJ/RH, LT-D3681FJ/FH LT-D4881RJ/RH, LT-D4881FJ/FH –10–...
- Page 11 (2) Outdoor Unit • Model : LT-D2860RJ/RH, LT-D2860FJ/FH LT-D3681RJ/RH, LT-D3681FJ/FH LT-E1860FJ/FH, LT-E2460FJ/FH Gas side 3-way valve Liquid side 2(3)-way valve MODEL LT-E1860FJ/FH LT-D2860RJ/RH LT-D3681RJ/RH LT-E2460FJ/FH LT-D2860FJ/FH LT-D3681FJ/FH 74.5 74.5 74.5 –11–...
- Page 12 • Model : LT-D4881RJ/RH, LT-D4881FJ/FH Liquid side 3-way valve Gas side 3-way valve Model LT-D4881RJ/RH LT-D4881FJ/FH Dimension 1225 1135 –12–...
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Page 13: Refrigeration Cycle Diagram
Refrigeration Cycle Diagram • HEAT PUMP 28K/36K/48K INDOOR UNIT OUTDOOR UNIT H/EX VALVE REVERSING Liquid Side Liquid Side Gas Side H/EX CAPI Heating Cooling COMPRESSOR Liquid Side Gas Side Gas Side CAPI • COOLING ONLY 18K/24K/28K/36K/48K INDOOR UNIT OUTDOOR UNIT H/EX COMPRESSOR Gas Side... -
Page 14: Wiring Diagram
Wiring Diagram • HEAT PUMP Model No.: LT-D2860RJ/RH OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM REMOVE JUMP WIRE WHEN CONNECTING FIRE ALARM SYSTEM FUSE T3.15A INDOOR DRAIN STEP MOTOR PUMP MOTOR CAPACITOR COMP MOTOR FUSE T3.15A PIPE THERMISTOR Defrost PCB POWER Pipe TH RELAY NO NC... -
Page 15: Heat Pump
• HEAT PUMP Model No.: LT-D4881RJ/RH OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM REMOVE JUMP WIRE WHEN CONNECTING FIRE ALARM SYSTEM Fuse (250V 5A) pipe TH INDOOR DRAIN STEP MOTOR PUMP MOTOR Fuse T/B3 FUSE T3.15A (250V 5A) FUSE T3.15A PIPE THERMISTOR S T N CRANK-CASE... - Page 16 • COOLING ONLY Model No.: LT-E1860FJ/FH, LT-E2460FJ/FH OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM CAPACITOR FUSE T3.15A STEP COMP INDOOR DRAIN MOTOR MOTOR MOTOR PUMP FUSE T3.15A REMOVE JUMP WIRE POWER PIPE WHEN CONNECTING FIRE ALARM SYSTEM RELAY THERMISTOR GN/YL FLOAT S/W...
- Page 17 • COOLING ONLY Model No.: LT-D4881FJ/FH OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM REMOVE JUMP WIRE WHEN CONNECTING FIRE ALARM SYSTEM INDOOR DRAIN STEP MOTOR PUMP MOTOR FUSE T3.15A PIPE S T N CRANK-CASE THERMISTOR HEATER POWER SUPPLY FLOAT S/W REMOTE GN/YL CN - DISP OPTION...
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Page 18: Operation Details
Operation Details (1) The function of main control 1. Time Delay Safety Control • 3min The compressor is ceased for 3minutes to balance the pressure in the refrigeration cycle. (Protection of compressor) • 5sec Vertical louvers are delayed for 5 secs to be opened to prevent the frictional sound between louver and air flow. •... -
Page 19: Heating Mode Operation
6. Heating Mode Operation The unit will operate according to the setting by the remote controller and the operation diagram is shown as follows. Intake Air temp. minimum 3min Setting temp.+3°C (Compressor OFF) Setting temp. (Compressor ON) minimum minimum minimum 1min 10sec. -
Page 20: Defrost Control
8. Defrost Control • Defrost control is available 45 minutes later since heating mode operation started, and it will not prolong over 10 minutes. • Defrost control is carried out when the outdoor pipe temp. falls below -6°C for more than 3 minutes after 45 minutes passed from starting of heating operation. -
Page 21: Installation Of Indoor, Outdoor Unit
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. • There should not be any obstacles to the air cir- culation. Ceiling •... -
Page 22: Ceiling Opening Dimensions And Hanging Bolt Location
2. Ceiling opening dimensions and hanging bolt location • The dimensions of the paper model for installing are the same as those of the ceiling opening dimensions. 600 (Ceiling opening) 18K/24K Ceiling 39.5 521(Hanging bolt) 39.5 Level gauge CAUTION 570 Unit size •... -
Page 23: The Indoor Unit Installation
3. The Indoor Unit Installation Ceiling Keep the length of the bolt Hanging bolt from the bracket to 40mm (W3/8 or M10) Flat washer for M10 Air Conditioner body (W3/8 or M10) (accessory) Ceiling board Ceiling board Spring washer (M10) Flat washer for M10 (accessory) Set screw of... -
Page 24: Wired Remote Control Installation
WIRED REMOTE CONTROL INSTALLATION DISASSEMBLING • Separate the under plate from Remote control box. Front case Lever carefully Remote control the box open box body using a screw • Fix the cord clamps on the wall by ø 3 tapping driver, etc. -
Page 25: Wiring Connection
5. Wiring Connection • Open the control box cover and connect the Remote controller cord and Indoor power wires. Indoor power cord Control box cover Remote [Air inlet side view] controller cord Control box cover fitting screw(2 units) • 18K/24K/28K, 1 Phase Terminal Block of Indoor Unit Terminal Block of Outdoor Unit Heat Pump Model... -
Page 26: Electrical Wiring
ELECTRICAL WIRING 1. All wiring must comply with LOCAL REGULATIONS. 2. Select a power source that is capable of supplying the current required by the air conditioner. 3. Feed the power source to the unit via a distribution switch board designed for this purpose. 4. -
Page 27: Connecting Pipes To The Indoor Unit
6. Connecting Pipes to the Indoor Unit • Preparation of Piping Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure. 1) Cutting the pipes and the cable Use the accessory piping kit or the pipes purchased Copper locally. - Page 28 Piping Connection 1. Form the piping according to its routing. Avoid bend- ing and bending back the same piping point more Liquid side than three times. (This will result in hardening of pipe.) Indoor 2. After deforming the piping, align centers of the union unit fitting of the indoor unit and the piping, and tighten Outdoor...
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Page 29: Installation Of Decorative Panel
7. Installation of Decorative Panel The decorative panel has its installation Before installing the decorative panel, direction. always remove the paper template. 1. Temporarily fix two decorative panel fixing screws (hexagon M5 screw) on the unit body. (Tighten by amount 10mm in length.) The fixing screws (hexagon M5 screw) are included the indoor unit box. -
Page 30: Indoor Unit Drain Piping
CAUTION Install certainly the decorative panel. Cool air leakage causes sweating. Water drops fall. Good example Bad example Air conditioner unit Air conditioner Cool air leakage unit (no good) Ceiling Ceiling board board Decorative Decorative panel panel Fit the insulator (this part) and be careful for cool air leakage 8. -
Page 31: Heat Insulation
HEAT INSULATION 1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C). Fastening band 2. Precautions in high humidity circumstance: (accessory) This air conditioner has been tested according to the "KS Standard Conditions with Mist" and confirmed that there is not any default. -
Page 32: Test Running
Seal a small opening In case of the Outdoor Unit being installed around the pipings above position of the Indoor Unit. with gum type sealer. Trap 2. Tape the Pipings and Connecting cable from bot- tom to top. 3. Form the pipings gathered by taping along the exterior wall, and make the trap prevent water from entering into the room. - Page 33 2) Connection of power supply 1. Connect the power supply cord to the independent power supply. • Circuit breaker is required. 2. Operate the unit for fifteen minutes or more. 3) Evaluation of the performance 1. Measure the temperature of the intake and dis- charge air.
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Page 34: Optional Operation
Optional Operation 1) Two Thermistor System (1) Open the rear cover of the wired remote-controller to set the mode. (2) Select one of three selectable modes as follows. • Position 1: The room temperature is controlled by the thermistor of the main body. •... - Page 35 2) Adjusting air volume to the height of ceiling You can choose the RPM(or air volume) of indoor motor according to the height of ceiling to supply the com- fortable atmosphere to consumers. Procedure 1. Choose the selectable position in the table after measuring the height of ceiling. Ceiling height Mode of slide switch Change of air volume...
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Page 36: Cycle
Cycle 1. Installation (Connecting the piping between indoor and outdoor unit) Liquid side Indoor unit Outdoor unit 2(3)-Way valve Gas side 3-Way valve Gas cylinder R-407C Purge the air • Installation (1) Connect the piping between the indoor and (5) If there is no leakage, discharge N in piping outdoor unit firmly. - Page 37 2. Disconnection (on moving) Liquid side Indoor unit Closed Outdoor unit 2(3)-Way valve Gas side Closed 3-Way valve Retrieving Tank • Disconnection (1) Attach the charging hose (manifold gage) to (6) Disconnect the piping between indoor and the service port. outdoor unit and then put on service cap to –...
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Page 38: Gas Charging
3. Gas Charging (After Evacuation) Liquid side Indoor unit Open Outdoor unit 2(3)-Way valve Gas side Open 3-Way valve Check valve Charging cylinder OPEN CLOSE • Procedure This is different from previous procedures. (1) Connect the charge hose to the charging Because you are charging with liquid refrigerant cylinder. -
Page 39: 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 out Current : less than 80% of Check refrigeration cycle rated current Temp. Difference Refrigerant leakege Temp. -
Page 40: Electronic Parts Troubleshooting Guide
Electronic Parts Troubleshooting Guide Possible Trouble 1 : The unit does not operate. Check the FUSE Is the input voltage and the wiring diagram. AC230V? Is the input voltage Check the main P.C.B of IC03D about DC12V? pattern. Is the output voltage Exchange IC03D. - Page 41 Possible Trouble 2 : The indoor fan does not operate. Is it the HOT It is normal operation. START mode? Is IC01M operated Exchange IC01M. normally? Is the each Relay Exchange Relay. any problem? Check the fan motor and connector.(CN-MOTOR) Possible Trouble 3 : Ineffective Heating Adjust operation mode.
- Page 42 Possible Trouble 4 : Auto Air direction louver does not operate. Is IC01M operated Exchange IC01M. normally? Check the motor and connector. (CN-LOUVER) : Wired remote controller does not operate. Possible Trouble 5 Check the parts of Is the LCD operated communication.
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Page 43: Electronic Control Device
Electronic control device MAIN P.C.B ASM –43–... -
Page 44: Schematic Diagram
Schematic Diagram –44–... -
Page 45: Exploded View And Replacement Parts List
Exploded View and Replacement Parts List 1. Indoor Unit • Model: LT-E1860FJ/FH, LT-E2460FJ/FH 266090 249951 268714 263230 159830 354211 35211A 352118 263230-2 158591 266012 330870 –45–... - Page 46 130411 W0CZZ 346810 359012 146811 268712 159830 130911-2 135802 135312-2 135312-1 267110-2 267110-1 130911-1 –46–...
- Page 47 • Model: LT-E1860FJ/FH, LT-E2460FJ/FH PART NO. LOCATION REMARK DESCRIPTION LT-E1860FJ LT-E1860FH LT-E2460FJ LT-E2460FH 130411 BASE ASSY,WELD[INDOOR] 3041A10013A 3041A10013A 3041A10013A 3041A10013A 130911-1 CABINET ASSY,INDOOR 3091A10023A 3091A10023A 3091A10023A 3091A10023A 130911-2 CABINET ASSY,INDOOR 3091A10023B 3091A10023B 3091A10023B 3091A10023B 135312-1 PANEL ASSY,FRONT(INDOOR) 3721A10021S 3721A10021C 3721A10021S 3721A10021C...
- Page 48 • Model: LT-D2860RJ/LT-D2860RH/LT-D2860FJ/LT-D2860FH LT-D3681RJ/LT-D3681RH/LT-D3681FJ/LT-D3681FH LT-D4881RJ/LT-D4881RH/LT-D4881FJ/LT-D4881FH 249951 266090 268714 159830 263230 354211-2 130411 354211-1 55211-2 552111 263230 352118-1 330870 158591 266012 –48–...
- Page 49 130411 W0CZZ 146811 268712 346810 152312 359012 130911-2 130911-3 135314 135802 137211 130911-4 130911-1 267110-1 267110-2 352150-2 –49–...
- Page 50 • Model: LT-D2860RJ/LT-D2860RH/LT-D2860FJ/LT-D2860FH PART NO. LOCATION REMARK DESCRIPTION LT-D2860RJ LT-D2860RH LT-D2860FJ LT-D2860FH 130411 BASE ASSY,WELD[INDOOR] 3041A10016A 3041A10016A 3041A10016A 3041A10016A 130911-1 CABINET ASSY,WELD 3091A10030A 3091A10030A 3091A10030A 3091A10030A 130911-2 CABINET ASSY,WELD 3091A10030B 3091A10030B 3091A10030B 3091A10030B 130911-3 CABINET ASSY,INDOOR 3091A10031A 3091A10031A 3091A10031A 3091A10031A 130911-4 CABINET ASSY,INDOOR 3091A10031B 3091A10031B 3091A10031B 3091A10031B 135314...
- Page 51 • Model: LT-D3681RJ/LT-D3681RH/LT-D3681FJ/LT-D3681FH PART NO. LOCATION REMARK DESCRIPTION LT-D3681RJ LT-D3681RH LT-D3681FJ LT-D3681FH 130411 BASE ASSY,WELD[INDOOR] 3041A10016A 3041A10016A 3041A10016A 3041A10016A 130911-1 CABINET ASSY,WELD 3091A10030A 3091A10030A 3091A10030A 3091A10030A 130911-2 CABINET ASSY,WELD 3091A10030B 3091A10030B 3091A10030B 3091A10030B 130911-3 CABINET ASSY,INDOOR 3091A10031A 3091A10031A 3091A10031A 3091A10031A 130911-4 CABINET ASSY,INDOOR 3091A10031B 3091A10031B 3091A10031B 3091A10031B 135314...
- Page 52 • Model: LT-D4881RJ/LT-D4881RH/LT-D4881FJ/LT-D4881FH PART NO. LOCATION REMARK DESCRIPTION LT-D4880RJ LT-D4880RH LT-D4880FJ LT-D4880FH 130411 BASE ASSY,WELD[INDOOR] 3041A10016A 3041A10016A 3041A10016A 3041A10016A 130911-1 CABINET ASSY,WELD 3091A10030A 3091A10030A 3091A10030A 3091A10030A 130911-2 CABINET ASSY,WELD 3091A10030B 3091A10030B 3091A10030B 3091A10030B 130911-3 CABINET ASSY,INDOOR 3091A10031A 3091A10031A 3091A10031A 3091A10031A 130911-4 CABINET ASSY,INDOOR 3091A10031B 3091A10031B 3091A10031B 3091A10031B 135314...
- Page 53 2. Outdoor Unit • Model: LT-E1860FJ/FH, LT-E2460FJ/FH –53–...
- Page 54 • Model: LT-E1860FJ/FH, LT-E2460FJ/FH PART NO. LOCATION REMARK DESCRIPTION LT-E1860FJ LT-E1860FH LT-E2460FJ LT-E2460FH 66920 RELAY 6920AP3400A 6920AP3400A 6920AP3400A 6920AP3400A 349480 ORIFICE 4948AP2527A 4948AP2527A 4948AP2527A 4948AP2527A 435311 GRILLE,DISCHARGE 3530A20007B 3530A20007B 3530A20007B 3530A20007B 435512 COVER ASSY, TOP(OUTDOOR) 3H03266X 3H03266X 3H03266R 3H03266R 437210...
- Page 55 • Model: LT-D2860RJ/LT-D2860RH/LT-D2860FJ/LT-D2860FH LT-D3681RJ/LT-D3681RH/LT-D3681FJ/LT-D3681FH –55–...
- Page 56 • Model: LT-D2860RJ/LT-D2860RH/LT-D2860FJ/LT-D2860FH PART NO. LOCATION REMARK DESCRIPTION LT-D2860RJ LT-D2860RH LT-D2860FJ LT-D2860FH 268711 PWB(PCB) ASSEMBLY,DEICER 6871A20034C 6871A20034C 349480 ORIFICE 4948AP2527A 4948AP2527A 4948AP2527A 4948AP2527A 435512 COVER ASSEMBLY,TOP(OUTDOOR) 3H03266H 3H03266H 3H03266H 3H03266H 437211 PANEL ASSY,FRONT SUB 1A00197C 1A00197C 1A00197C 1A00197C 437213-1 PANEL ASSY,SIDE 1A00202C 1A00202C 1A00202C...
- Page 57 • Model: LT-D3681RJ/LT-D3681RH/LT-D3681FJ/LT-D3681FH PART NO. LOCATION REMARK DESCRIPTION LT-D3681RJ LT-D3681RH LT-D3681FJ LT-D3681FH 268711 PWB(PCB) ASSEMBLY,DEICER 6871A20034B 6871A20034B 349480 ORIFICE 4948AP2527A 4948AP2527A 4948AP2527A 4948AP2527A 435512 COVER ASSEMBLY,TOP(OUTDOOR) 3H03266H 3H03266H 3H03266H 3H03266H 437211 PANEL ASSY,FRONT SUB 1A00197C 1A00197C 1A00197C 1A00197C 437213-1 PANEL ASSY,SIDE 1A00202C 1A00202C 1A00202C...
- Page 58 • Model: LT-D4881RJ/LT-D4881RH/LT-D4881FJ/LT-D4881FH –58–...
- Page 59 • Model: LT-D4881RJ/LT-D4881RH/LT-D4881FJ/LT-D4881FH PART NO. LOCATION REMARK DESCRIPTION LT-D4881RJ LT-D4881RH LT-D4881FJ LT-D4881FH 435301 GRILLE,DISCHARGE 3530AP1225D 3530AP1225D 3530AP1225D 3530AP1225D 237204 PANEL,SIDE 3720AP1215B 3720AP1215B 3720AP1215B 3720AP1215B 268711 PWB(PCB) ASSY,DEICER 6871A20034A 6871A20034A 269200 RELAY 3A00261C 3A00261C 430410 BASE ASSY,WELD[OUTDOOR] 3041AP2569B 3041AP2569B 3041AP2569B 3041AP2569B 435511 COVER ASSEMBLY,CONTROL(OUTDOOR) 3A01293X...
- Page 60 December, 2000 February, 2003 Printed in Korea P/No.: 3828A30023K Printed in Korea P/No.: 3828A20050U...