Related Manuals for LG LT-E1860RJ
Summary of Contents for LG LT-E1860RJ
- Page 1 Ceiling Cassette Air Conditioner SERVICE MANUAL MODELS: LT-E1860RJ/RH LT-E2460RJ/RH LT-D3680RJ/RH/FJ/FH LT-D4880RJ/RH/FJ/FH...
-
Page 2: Table Of Contents
Contents Model Identification .........................3 Functions ..........................4 Product Specifications (Cooling & Heating) ................6 Dimensions ..........................8 Refrigeration Cycle Diagram ....................12 Wiring Diagram ........................13 Operation Details ........................16 Installation of Indoor, Outdoor Unit ..................19 Cycle ............................34 Cycle Troubleshooting Guide ....................37 Electronic Parts Troubleshooting Guide ................38 Electronic Control Device .....................41 Schematic Diagram .......................42 Exploded View and Replacement Parts List ...............43... -
Page 3: Model Identification
8 : 380~415V /50Hz / 3ø Cooling/Heating Capacity 18: 18,000 Btu/hr 36: 36,000 Btu/hr 24: 24,000 Btu/hr 48: 48,000 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 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-E1860RJ LT-E2460RJ Model LT-E1860RH LT-E2460RH 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 4,536(5,274) Heating kcal/h(W) 18,000 24,000 Btu/h 2,000 2,900 Input Cooling 2,000... - Page 7 LT-D3680RJ LT-D3680FJ LT-D4880RJ LT-D4880FJ Model LT-D3680RH LT-D3680FH LT-D4880RH LT-D4880FH 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...
-
Page 8: Dimensions
Dimensions (1) Indoor Unit • Model : LT-E1860RJ/RH, LT-E2460RJ/RH CLOSE OPEN OPEN CLOSE –8–... - Page 9 • Model : LT-D3680RJ/RH, LT-D3680FJ/FH LT-D4880RJ/RH, LT-D4880FJ/FH –9–...
- Page 10 (2) Outdoor Unit • Model : LT-E1860RJ/RH, LT-E2460RJ/RH LT-D3680RJ/RH, LT-D3680FJ/FH Gas side 3-way valve Liquid side 2(3)-way valve MODEL LT-E1860RJ/RH LT-D3680RJ/RH LT-E2460RJ/RH LT-D3680FJ/FH 74.5 74.5 –10–...
- Page 11 • Model : LT-D4880RJ/RH, LT-D4880FJ/FH Liquid side 3-way valve Gas side 3-way valve Model LT-D4880RJ/RH LT-D4880FJ/FH Dimension 1225 1135 –11–...
-
Page 12: Refrigeration Cycle Diagram
Refrigeration Cycle Diagram • HEAT PUMP 18K/24K 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 36K/48K INDOOR UNIT OUTDOOR UNIT H/EX VALVE REVERSING Liquid Side Liquid Side Gas Side... -
Page 13: Wiring Diagram
Wiring Diagram • HEAT PUMP Model No.: LT-E1860RJ/RH, LT-E2460RJ/RH OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM WIRING OF FIELD CAPACITOR INDOOR DRAIN STEP MOTOR PUMP MOTOR CAPACITOR MOTOR COMP REMOVE JUMP WIRE FUSE T3.15A WHEN CONNECTING FIRE ALARM SYSTEM PIPE THERMISTOR... - Page 14 Model No.: LT-D4880RJ/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 (250V 5A) FUSE T3.15A FUSE T3.15A PIPE THERMISTOR S T N CRANK-CASE HEATER T/B1...
- Page 15 • COOLING ONLY Model No.: LT-D3680FJ/FH OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM COMPRESSOR C TH THERMISTOR FOR PIPE TEMP. MAGNECTIC CONTACOR OUTDOOR FAN MOTOR INDOOR DRAIN STEP CRANK CASE HEATER FOR CM FUSE 250V, 5A MOTOR PUMP MOTOR RUN CAPACITOR FOR FMo TERMINAL BLOCK(FOR JUMP) TERMINAL BLOCK(FOR POWER) FUSE T3.15A...
-
Page 16: 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 17 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 18 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 19: 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 20 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 521(Hanging bolt) 39.5 39.5 Level gauge CAUTION 570 Unit size •...
- Page 21 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 22 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 23 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, 1 Phase Terminal Block of Indoor Unit Terminal Block of Outdoor Unit Heat Pump Model...
- Page 24 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 25 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 26 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...
- Page 27 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 28 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 29 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 30 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 31 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.
- Page 32 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 33 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...
-
Page 34: 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 35 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 –...
- Page 36 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 37: 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 38: 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 39 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 40 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.
-
Page 41: Electronic Control Device
Electronic control device MAIN P.C.B ASM –41–... -
Page 42: Schematic Diagram
Schematic Diagram –42–... -
Page 43: Exploded View And Replacement Parts List
Exploded View and Replacement Parts List 1. Indoor Unit • Model: LT-E1860RJ/LT-E1860RH/LT-E2460RJ/LT-E2460RH 266090 249951 268714 263230 159830 354211 35211A 352118 263230-2 158591 266012 330870 –43–... - Page 44 130411 W0CZZ 346810 359012 146811 268712 159830 130911-2 135802 135312-2 135312-1 267110-2 267110-1 130911-1 –44–...
- Page 45 • Model: LT-E1860RJ/LT-E1860RH/LT-E2460RJ/LT-E2460RH PART NO. LOCATION REMARK DESCRIPTION LT-E1860RJ LT-E1860RH LT-E2460RJ LT-E2460RH 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) 3721A10021B 3721A10021A 3721A10021B 3721A10021A...
- Page 46 • Model: LT-D3680RJ/LT-D3680RH/LT-D3680FJ/LT-D3680FH LT-D4880RJ/LT-D4880RH/LT-D4880FJ/LT-D4880FH 249951 266090 268714 159830 263230 354211-2 130411 354211-1 55211-2 552111 263230 352118-1 330870 158591 266012 –46–...
- Page 47 130411 W0CZZ 146811 268712 346810 152312 359012 130911-2 130911-3 135314 135802 137211 130911-4 130911-1 267110-1 267110-2 352150-2 –47–...
- Page 48 • Model: LT-D3680RJ/LT-D3680RH/LT-D3680FJ/LT-D3680FH PART NO. LOCATION REMARK DESCRIPTION LT-D3680RJ LT-D3680RH LT-D3680FJ LT-D3680FH 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 49 • Model: LT-D4880RJ/LT-D4880RH/LT-D4880FJ/LT-D4880FH 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 50 2. Outdoor Unit • Model: LT-E1860RJ/LT-E1860RH/LT-E2460RJ/LT-E2460RH –50–...
- Page 51 • Model: LT-E1860RJ/LT-E1860RH/LT-E2460RJ/LT-E2460RH PART NO. LOCATION REMARK DESCRIPTION LT-E1860RJ LT-E1860RH LT-E2460RJ LT-E2460RH 66920 RELAY 6920AP3400A 6920AP3400A 6920AP3400A 6920AP3400A 268711 PWB(PCB) ASSEMBLY,DEICER 6871A20034B 6871A20034B 6871A20034B 6871A20034B 349480 ORIFICE 4948AP2527A 4948AP2527A 4948AP2527A 4948AP2527A 435311 GRILLE,DISCHARGE 3530A20007B 3530A20007B 3530A20007B 3530A20007B 435512 COVER ASSY,TOP(OUTDOOR)
- Page 52 • Model: LT-D3680RJ/LT-D3680RH/LT-D3680FJ/LT-D3680FH –52–...
- Page 53 • Model: LT-D3680RJ/LT-D3680RH/LT-D3680FJ/LT-D3680FH PART NO. LOCATION REMARK DESCRIPTION LT-D3680RJ LT-D3680RH LT-D3680FJ LT-D3680FH 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 54 • Model: LT-D4880RJ/LT-D4880RH/LT-D4880FJ/LT-D4880FH –54–...
- Page 55 • Model: LT-D4880RJ/LT-D4880RH/LT-D4880FJ/LT-D4880FH PART NO. LOCATION REMARK DESCRIPTION LT-D4880RJ LT-D4880RH LT-D4880FJ LT-D4880FH 135301 GRILLE,DISCHARGE 3530AP1225D 3530AP1225D 3530AP1225D 3530AP1225D 137212 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) 3551A30014Y 3551A30014Y 3551A30014Z 3551A30014Z 435512...
- Page 56 December, 2000 April, 2002 Printed in Korea P/No.: 3828A30023K Printed in Korea P/No.: 3828A20050T...