Related Manuals for LG LM-4462C2T
Summary of Contents for LG LM-4462C2T
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Page 1: Air Conditioner
Ceiling Cassette Multi Air Conditioner SERVICE MANUAL MODELS: LM-4462H2T LM-4462C2T... -
Page 2: Table Of Contents
Contents Functions ..........................3 Product Specifications (Cooling & Heating)................ 5 Dimensions ..........................6 Refrigeration Cycle Diagram ....................7 Wiring Diagram........................9 Operation Details ......................... 11 Installation of Indoor, Outdoor Unit..................14 Test Running ........................26 Cycle............................31 Cycle Troubleshooting Guide....................34 Electronic Parts Troubleshooting Guide................ -
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. • Indoor fan is delayed for 5 seconds at the starting. Starting Current 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 (Low) (Med) (High) Room Temperature Display : High:39°C LOW:11°C Temperature Setting Down to 18°C... -
Page 5: Product Specifications (Cooling & Heating)
Product Specifications Model Name LM-4462H2T LM-4462C2T Item Unit A or B A + B A or B A + B Cooling Capacity Btu/h(kcal/h) 22,000 44,000 22,000 44,000 Heating Capacity Btu/h(kcal/h) 21,500 43,000 Moisture Removal l / h Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz... -
Page 6: Dimensions
Dimensions Indoor Unit CLOSE OPEN OPEN CLOSE Outdoor Unit 1,225 –6–... -
Page 7: Refrigeration Cycle Diagram
Refrigeration Cycle Diagram LM-4462H2T INDOOR A-UNIT OUTDOOR UNIT LIQUID SIDE CAPI CAPILLARY TUBE HEAT EXCHANGER GAS SIDE HEAT EXCHANGER A-REVERSING VALVE INDOOR B-UNIT A-COMPRESSOR GAS SIDE HEAT EXCHANGER B-REVERSING VALVE CAPI B-COMPRESSOR HEAT EXCHANGER CAPILLARY TUBE LIQUID SIDE COOLING HEATING Pipe size(Diameter: ø) Piping length(m) Elevation(m) - Page 8 LM-4462C2T INDOOR A-UNIT OUTDOOR UNIT LIQUID SIDE CAPILLARY TUBE GAS SIDE HEAT EXCHANGER A-COMPRESSOR INDOOR B-UNIT GAS SIDE HEAT EXCHANGER B-COMPRESSOR CAPI CAPILLARY TUBE LIQUID SIDE Pipe size(Diameter: ø) Piping length(m) Elevation(m) Liquid Rated Max. Rated Max. 5/8" 3/8" ( Rated performance for refrigerant line length of: 7.5m) For installation over rated distance, 70g of refrigerant should be added for each meter in Heat pump Model.
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Page 9: Wiring Diagram
Wiring Diagram LM-4462H2T • Indoor Unit INDOOR WIRING DIAGRAM INDOOR DRAIN STEP MOTOR PUMP MOTOR FUSE T3.15A GN/YL PIPE THERMISTOR FLOAT S/W REMOTE CN - DISP CONTROL TERMINAL DISPLAY PCB BLOCK 3854A20126L • Outdoor Unit A-COMP B-COMP A-MOTOR B-MOTOR A-COMP B-COMP POWER POWER... -
Page 10: Indoor Unit
LM-4462C2T • Indoor Unit • Outdoor Unit A-COMP B-COMP A-MOTOR B-MOTOR OR OR A-MOTOR RELAY B-MOTOR RELAY A-COMP RELAY TEMP. THERMISTOR B-COMP RELAY GN/YL 3 ( L ) 4 ( N ) 3 ( L ) 4 ( N ) 5 ( A ) 3 ( L ) 4 ( N ) 5 ( B ) -
Page 11: 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 air flow direction control louvers open in 5 seconds to prevent noise between louvers and wind. •... -
Page 12: 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 13: Defrost Control
8. Defrost Control • Defrost operation is controlled by timer and sensing temperature of outdoor pipe. • The first defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from starting of heating operation and more than 9 minutes operation of compressor. •... -
Page 14: 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 good. - Page 15 3) Piping length and the elevation Elevation B(m) * Additional Pipe Size Length A(m) Indoor unit refrigerant MODEL (g/m) Max. Max. Rated Rated GAS LIQUID Cooling Model 5/8" 3/8" Heat pump Model 5/8" 3/8" Outdoor unit • Rated performance for refrigerant line length of: 7.5m NOTE: •...
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Page 16: 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 dimen- 600 (Ceiling opening) sions. 39.5 521(Hanging bolt) 39.5 570 Unit size Unit:mm CAUTION •... -
Page 17: 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 18: 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 19: Wiring Connection
Terminal Block of Outdoor Unit 3(L) 4(N) 3(L) 4(N) 4(N) 3(L) 5 4(N) 3(L) 5 Power Cord LM-4462C2T A-Unit B-Unit Terminal Block of Outdoor Unit Terminal Block of Indoor Unit Terminal Block of Indoor Unit Terminal Block of Outdoor Unit... -
Page 20: 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 21: 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 Copper Slanted Uneven Rough tube out correct flaring work in the following procedure. 90° 1) Cut the pipes and the cable. Use the accessory piping kit or the pipes purchased locally. - Page 22 Piping Connection 1. Form the piping according to its routing. Avoid Liquid side bending and bending back the same piping point more than three times. (This will result in harden- Indoor ing the pipe.) unit 2. After deforming the piping, align centers of the Outdoor union fitting of the indoor unit and the piping, and Flare connection...
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Page 23: 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 24: Indoor Unit Drain Piping
CAUTION Install certainly the cassette trim. 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 Cassette trim Cassette trim Fit the insulator (this part) and be careful for cool air leakage 8. -
Page 25: Heat Insulation
HEAT INSULATION 1. Use the heat insulation material for the refriger- ant piping which has an excellent heat-resis- Fastening band (accessory) tance (over 120°C). 2. Precautions in high humidity circumstance: This air conditioner has been tested according to the "KS Standard Conditions with Mist" and con- Refrigerant piping firmed that there is not any default. -
Page 26: Test Running
In case of the Outdoor Unit being installed above Seal a small opening position of the Indoor Unit. around the pipings with gum type sealer. 2. Tape the Pipings and Connecting cable from bottom to top. Trap 3. Form the pipings gathered by taping along the exterior wall, and make the trap prevent water from entering into the room. - Page 27 2) Connection of power supply 1. Connect the power supply cord to the inde- pendent 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 discharge air.
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Page 28: 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 29 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 30: Wiring Design
3) Group Control(Optional Wiring) • You can use a group control operation after connecting the brown and yellow wire of each air-conditioner. • Remove the resistor "OP 7" in remote controller. • It operates maximum 16 Units by only one Wired Remote Controller, and each Unit starts sequentially to prevent overcurrent. -
Page 31: Cycle
Cycle 1. Installation (Connecting the piping between indoor and outdoor unit) Liquid side Indoor unit Outdoor unit 3-Way valve Gas side 3-Way valve Gas cylinder 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 32 2. Disconnection (on moving) Liquid side Indoor unit Closed Outdoor unit 2-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 33: Gas Charging
3. 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 This is different from previous procedures. (1) Connect the charge hose to the charging Because you are charging with liquid refrigerant cylinder. -
Page 34: 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 35: 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 36 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 37 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 38: Electronic Control Device
Electronic control device MAIN P.C.B ASM –38–... - Page 39 (2) MAIN P.C.B ASM (OUTDOOR) –39–...
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Page 40: Schematic Diagram
Schematic Diagram –40–... - Page 41 –41–...
- Page 42 –42–...
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Page 43: Exploded View And Replacement Parts List
Exploded View and Replacement Parts List 1. Indoor Unit 249941 249951 268714 354211 35211A 352118 263230 158591 266012 330870 –43–... - Page 44 130411 W0CZZ 346810 359011 146811 268712 140570 159830 130911-2 135802 135312-2 135312-1 352150 130911-1 267110 267110 352150 –44–...
- Page 45 Indoor Unit parts list Model: LM-4462C2T PART NO. LOCATION DESCRIPTION REMARKS LM-4462C2T 130411 BASE ASSY, WELD[INDOOR] 3041A10013A 130911-1 CABINET ASSY, INDOOR 3091A10023A 130911-2 CABINET ASSY, INDOOR 3091A10023B 135312-1 PANEL ASSY, FRONT(INDOOR) 3721A10021C 135312-2 GRILLE ASSY, FRONT(INDOOR) 3531A10059A 146811 MOTOR ASSY, STEP...
- Page 46 Indoor Unit parts list Model: LM-4462H2T PART NO. LOCATION DESCRIPTION REMARKS LM-4462H2T 130411 BASE ASSY, WELD[INDOOR] 3041A10013A 130911-1 CABINET ASSY, INDOOR 3091A10023A 130911-2 CABINET ASSY, INDOOR 3091A10023B 135312-1 PANEL ASSY, FRONT(INDOOR) 3721A10021A 135312-2 GRILLE ASSY, FRONT(INDOOR) 3531A10059A 146811 MOTOR ASSY, STEP 4681AP2968D 158591 PUMP ASSY, WATER...
- Page 47 2. Outdoor Unit –47–...
- Page 48 Outdoor Unit parts list Model: LM-4462C2T PART NO. LOCATION DESCRIPTION REMARKS LM-4462C2T 430410 BASE ASSY, WELD 3041AP2569J 554160 COMPRESSOR ASSY 5417A90002A 554031 CONDENSER ASSY, BENT 5403A20044R 549610 MOUNT, MOTOR 4960A10004A 546810 MOTOR ASSY, OUTDOOR 4681A20013X 559010 FAN ASSY, PROPELLER 1A00195B...
- Page 49 Outdoor Unit parts list Model: LM-4462H2T PART NO. LOCATION DESCRIPTION REMARKS LM-4462H2T 135301 GRILLE, DISCHARGE 3530AP1225B 137213 PANEL, SIDE 3720AP1215E 430410 BASE ASSY, WELD(OUTDOOR) 3041AP2569J 435511 COVER ASSY, CONTROL(OUTDOOR) 3A01293X 435512 COVER ASSY, TOP(OUTDOOR) 3550AP1213B 437210 PANEL ASSY, FRONT SUB 3720AP1212B 437212 PANEL ASSY, REAR...
- Page 50 Memo –50–...
- Page 51 January, 2002 P/No.: 3828A20197A Printed in Korea...