Related Manuals for LG LT-E2460FL
Summary of Contents for LG LT-E2460FL
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Page 1: Service Manual
Ceiling Cassette Air Conditioner SERVICE MANUAL MODELS: LT-E2460FL/LT-E2460FA LT-E2460RL/LT-E2460RA... -
Page 2: Table Of Contents
Contents Functions ..........................3 Product Specifications (Cooling)....................5 Dimensions ..........................6 Refrigeration Cycle Diagram ....................8 Wiring Diagram ........................9 Operation Details ........................10 Installation of Indoor, Outdoor Unit ..................13 2-way Valve, 3-way Valve ......................28 Cycle Troubleshooting Guide ....................33 Electronic Parts Troubleshooting Guide ................34 Electronic Control Device .....................37 Schematic Diagram .......................38 Exploded View and Replacement Parts List ...............39 –2–... -
Page 3: Functions
Functions Indoor Unit Operation ON/OFF by Remote controller Sensing the Room Temperature • Room temperature sensor. (Thermistor) • Maintains the room temperature in accordance with the Setting Temp. Room temperature control • Indoor fan is delayed for 5 seconds at the starting. Starting Current Control Time Delay Safety Control •... -
Page 4: 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 5: Product Specifications (Cooling)
Product Specifications (Cooling) Model LT-E2460FL/FA LT-E2460RL/RA 1, 220-240, 50 1, 220-240, 50 Power Supply ø, V, Hz Capacity Cooling kcal/h(W) 23,300 23,300 Btu/h Heating kcal/h(W) 23,500 Btu/h 2,400 2,600 Input Cooling Heating 11.2 Running Current Cooling Heating 2.19 E. E. R kcal/h(W) C.O.P... -
Page 6: Dimensions
Dimensions (1) Indoor Unit • Model : LT-E2460FL/FA, LT-E2460RL/FL CLOSE OPEN OPEN CLOSE –6–... - Page 7 (2) Outdoor Unit Gas side 3-way valve Liquid side MODEL LT-E2460FL/FA LT-E2460RL/RA 74.5 –7–...
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Page 8: Refrigeration Cycle Diagram
Refrigeration Cycle Diagram • COOLING ONLY INDOOR UNIT OUTDOOR UNIT H/EX COMPRESSOR Gas Side Gas Side Gas Side H/EX CAPI CAPI Liquid Side Liquid Side • HEAT PUMP INDOOR UNIT OUTDOOR UNIT H/EX VALVE REVERSING Liquid Side Gas Side H/EX CAPI Heating Cooling... -
Page 9: Wiring Diagram
Wiring Diagram • COOLING ONLY Models : LT-E2460FL/FA INDOOR WIRING DIAGRAM OUTDOOR WIRING DIAGRAM STEP INDOOR DRAIN CAPACITOR MOTOR MOTOR PUMP COMP MOTOR FUSE T3.15A PIPE THERMISTOR POWER RELAY GN/YL FLOAT S/W REMOTE CN - DISP CONTROL OPTION TERMINAL TERMINAL... -
Page 10: 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 11: 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 12: 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 13: 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 prevent the air circulation. • A place where air circulation in the room will be Ceiling Ceiling Board Ceiling Board... -
Page 14: 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) Ceiling 521(Hanging bolt) 39.5 39.5 Level gauge CAUTION • This air-conditioner uses a drain pump. •... -
Page 15: 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 16: 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 17: 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) • 24K, 1 Phase Cooling Model Terminal Block of Indoor Unit Terminal Block of Outdoor Unit... -
Page 18: 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 19: 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) Cut the pipes and the cable. Use the accessory piping kit or the pipes purchased Copper locally. - Page 20 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 the 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 21: 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 22: 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 23: 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 24: 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 25 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 26: 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 27: Wiring Design
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 28: 2-Way Valve, 3-Way Valve
2-way Valve, 3-way Valve 1. Pumping down Liquid side Indoor unit Open Outdoor unit 2(3)-Way valve Gas side Closed 3-Way valve CLOSE CLOSE Purge the air • Procedure (6) Operate the air conditioner in cooling mode (1) Confirm that both liquid side and gas side and stop it when the gaug e indicates valves are set to the open position. - Page 29 1) Re-air purging (Re-installation) Liquid side Indoor unit Closed Outdoor unit 2(3)-Way valve Gas side Closed 3-Way valve Gas cylinder R-410A OPEN CLOSE • Procedure (6) Disconnect the charge set and the gas (1) Confirm that both the liquid side valve and the cylinder, and set the 2-way and 3-way valves gas side valve are set to the closed position.
- Page 30 2) Balance refrigerant of the 3-way valve (Gas leakage) Liquid side Indoor unit Outdoor unit 2(3)-Way valve Open Gas side 3-Way valve Open OPEN CLOSE • Procedure (1) Confirm that both the liquid side and gas side (3) Open the valve (Lo side) on the charge set valves are set to the back seat.
- Page 31 2. Evacuation (All amount of refrigerant leaked) Liquid side Indoor unit Outdoor unit 2(3)-Way valve Open Gas side 3-Way valve Open Vacuum pump OPEN CLOSE • Procedure (1) Connect the vacuum pump to the center hose (3) Close the valve (Lo side) on the charge set, of charge set center hose turn off the vacuum pump, and confirm that the gauge needle does not move (approxima-...
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Page 32: 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 (1) Connect the charge hose to the charging This is different from previous procedures. cylinder. -
Page 33: 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 34: 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 35 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 36 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 37: Electronic Control Device
Electronic control device MAIN P.C.B ASSY –37–... -
Page 38: Schematic Diagram
Schematic Diagram –38–... -
Page 39: Exploded View And Replacement Parts List
Exploded View and Replacement Parts List 1. Indoor Unit • Model: LT-E2460FL/FA, LT-E2460RL/RA 266090 249951 268714 263230 159830 354211 35211A 352118 263230-2 158591 266012 330870 –39–... - Page 40 130411 W0CZZ 346810 359011 146811 268712 159830 130911-2 135802 135312-2 135312-1 267110-2 267110-1 130911-1 –40–...
- Page 41 • Model: LT-E2460FL/FA, LT-E2460RL/RA PART NO. LOCATION REMARK DESCRIPTION LT-E2460FL LT-E2460FA LT-E2460RL LT-E2460RA 130411 BASE ASSY, WELD[INDOOR] 3041A10013A 3041A10013A 3041A10013A 3041A10013A 135802 DOOR, LOCK 3580A20005A 3580A20005A 3580A20005A 3580A20005A 146811 MOTOR ASSY, STEP 4681AP2968D 4681AP2968D 4681AP2968D 4681AP2968D 158591 PUMP ASSY, WATER...
- Page 42 2. Outdoor Unit • Model: LT-E2460FL/FA, LT-E2460RL/RA –42–...
- Page 43 • Model: LT-E2460FL/FA, LT-E2460RL/RA PART NO. LOCATION DESCRIPTION REMARK LT-E2460FL/FA LT-E2460RL/RA 435512 COVER 2A00915J 2A00915J 349480 ORIFICE 4948AP2527A 4948AP2527A 435301 GRILLE, DISCHARGE 3530A20007B 3530A20007B 435511 COVER ASSY, CONTROL (OUTDOOR) 3A01919B 3A01919B 437210 PANEL, FRONT 1A00196N 1A00196N 437212 PANEL ASSY, REAR...
- Page 44 December, 2000 January, 2002 Printed in Korea P/No.: 3828A30023K Printed in Korea P/No.: 3828A20050H...