LG LT-E1820CL Manual
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LG LT-E1820CL Manual

LG LT-E1820CL Manual

Ceiling cassette air conditioner exploded view
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See also: Service Manual
Ceiling Cassette Air Conditioner
SVC MANUAL(Exploded View)
MODEL : LT-E1820CL/LT-E1820HL
LT-E1860CL/LT-E1860HL
LT-E1860AA
LT-E1862HL/BA
LT-E2460CL/LT-E2460HL
LT-E2460BL
LT-E2462HL/LT-E2462CL/BA
LT-E2460AA
LT-C182ELE0/LT-H182ELE0
LT-H246ELE0/ELF0
LT-C246ELE0/ELF0
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com

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Summary of Contents for LG LT-E1820CL

  • Page 1 Internal Use Only http://biz.lgservice.com Ceiling Cassette Air Conditioner SVC MANUAL(Exploded View) MODEL : LT-E1820CL/LT-E1820HL LT-E1860CL/LT-E1860HL LT-E1860AA LT-E1862HL/BA LT-E2460CL/LT-E2460HL LT-E2460BL LT-E2462HL/LT-E2462CL/BA LT-E2460AA LT-C182ELE0/LT-H182ELE0 LT-H246ELE0/ELF0 LT-C246ELE0/ELF0 CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

  • Page 2: Table Of Contents

    Cycle Troubleshooting Guide ....................41 Electronic Parts Troubleshooting Guide ................42 Electronic Control Device .....................45 Schematic Digram ........................46 Exploded View ........................47 - 2 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Functions

    So it enables to install the indoor unit at high celling space and Auto Elevation Grille makes you clean the filter easily. - 3 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 4: Remote Controller

    Cancel Cancel Weekly Program Program Week Holiday : Fan Operates without cooling & heating SET/CLR Hour Fan Operation Mode - 4 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 • In case when obstacle such as curtain hides the signal reception part of receiver in between the space interval, Remote Controller operation is infeasible. - 5 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 6 Automatic stop distance 1.5±0.5m 2.5±0.5 m 3.5±0.5m ✳ If you want to change automatic distance setting, consult with your sale agency. - 6 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 7: Product Specifications (Cooling & Heating)

    Installation Pipe Length Elevation FoamPE/5mm FoamPE/5mm FoamPE/5mm FoamPE/5mm FoamPE/5mm FoamPE/5mm Insulation(material/thickness) ø25/32 ø25/32 ø25/32 ø25/32 ø25/32 ø25/32 Drain Hose(I.D/O.D) - 7 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 5/8(15.88mm) (inch) Installation Pipe Length Elevation FoamPE/5mm FoamPE/5mm FoamPE/5mm FoamPE/5mm FoamPE/5mm Insulation(material/thickness) ø25/32 ø25/32 ø25/32 ø25/32 ø25/32 Drain Hose(I.D/O.D) - 8 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Dimensions

    Dimensions (1) Indoor Unit CLOSE OPEN OPEN CLOSE - 9 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 LT-H***ELE0 LT-H***FLE0 LT-H***DLE0 (unit : mm) Model LT-H***ELE0 LT-H***FLE0 LT-H***DLE0 Unit - 10 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 (2) Outdoor Unit Gas side 3-way valve Liquid side 3-way valve MODEL All Models 74.5 - 11 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: Refrigeration Cycle Diagram

    • Rated performance for refrigerant line length of: 7.5m • If 18K Capacity is installed at a distance of 15m, 187.5g of refrigerant should be added ............(15-7.5)x25g - 12 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Cooling Only

    • Rated performance for refrigerant line length of: 7.5m • If 18K Capacity is installed at a distance of 15m, 187.5g of refrigerant should be added ............(15-7.5)x25g - 13 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 14: Wiring Diagram

    S/CAPACITOR CAPACITOR COMP MOTOR POWER REVERSING RELAY VALVE COMP S/CAPA CN-POWER TERMINAL BLOCK POWER TO INDOOR UNIT INPUT 3854A20119A - 14 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Wiring Diagram

    FUSE T3.15A PIPE THERMISTOR GN/YL FLOAT S/W REMOTE CN - DISP CONTROL TERMINAL DISPLAY PCB BLOCK Only for LT-Exxx2HL - 15 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Outdoor Wiring Diagram

    2HL ONLY LT-E REMOTE CN - DISP CONTROL TERMINAL DISPLAY PCB BLOCK TERMINAL POWER BLOCK TO INDOOR UNIT INPUT - 16 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 I ELEVATION GRILL WIRING DIAGRAM (INDOOR) LT-H***DLE0/LT-C***DLE0 LT-H***ELE0/LT-C***ELE0 LT-H***FLE0/LT-C***FLE0 - 17 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 18: Operation Details

    More than More than 3 minutes 3 minutes Selecting Selecting Selecting INDOOR FAN fan speed fan speed fan speed COMPRESSOR - 18 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Heating Mode Operation

    • If the evaporator piping temperature drops below 22°C, indoor fan stops again. • The operation diagram is as follows. PIPING 1min TEMPERATURE 25°C 22°C Selected INDOOR FAN fan speed COMPRESSOR - 19 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 Indoor piping thermistor error CH 03 Indoor main body / Remote controller unit communication error CH 04 Water level float switch error - 20 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 21: Installation Of Indoor, Outdoor Unit

    • If 18K Model is installed at a distance of 15m, 187.5g of Outdoor unit refrigerant should be added (15-7.5)x25g - 21 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 22: Ceiling Opening Dimensions And Hanging Bolt Location

    3. Avoid places where inflammable gas is generated. 4. Avoid place where noxious gas is generated. 5. Avoid places near high frequency generators. - 22 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 23: The Indoor Unit Installation

    • If the remote controller cord is secured to the wall, provide a trap at the top of the cord to prevent water droplets from running to the controller. - 23 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 24: Wired Remote Control Installation

    Re-attach the cover. going to be used for long time. • Slide it back into position. - 24 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 25: Wiring Connection

    If the supply cord is damaged, it must be replaced by a special cord or assembly available from the manufac- turer or its service agent. WARNING Make sure that the screws of the terminal are free from looseness. - 25 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 26: Electrical Wiring

    A disconnec- cable tion device to adequately disconnect all supply lines Cover control Holder for must be fitted. connecting cable - 26 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 27: Connecting Pipes To The Indoor Unit

    = Improper flaring = Inclined Surface Cracked Uneven damaged thickness Even length all round - 27 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 28: Piping Connection

    1.8kg . m Ø6.35mm 4.0kg . m Ø9.52mm 5.5kg . m Ø12.7mm 6.6kg . m Ø15.88mm 6.6kg . m Ø19.05mm - 28 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 29: Installation Of Decoration Panel

    Ceiling board board Decoration Decoration panel panel Fit the insulator (this part) and be careful for cool air leakage - 29 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 (Tightening about 10mm) Inlet Grille Louver motor Decoration panel Key holes Display Decoration panel fixing screws (Hexagon M5 screw) Inlet grille - 30 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 • Don't damage lift rope by a sharp material. Or else there is worry about suction grill dropping because of rope cutoff. - 31 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 32: Indoor Unit Drain Piping

    • Vibration of a magnetic switch, damage on the contact point there of, fuse breaking, disturbance to the normal function of a overload protection device. • Proper starting power is not given to the compressor. - 32 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 33: Heat Insulation

    Trap is required to prevent water from entering into electrical parts. - 33 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 34: Test Running

    ❏ Aren't terminal screws loosened? (refrigerant and drain piping)? ❏ Is there any leakage of refrigerant? M4..118N.cm{12kgf.cm} M5..196N.cm{20kgf.cm} M6..245N.cm{25kgf.cm} M8..588N.cm{60kgf.cm} - 34 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 35: Hand Over

    HAND OVER Teach the customer the operation and maintenance procedures, using the operation manual (air filter cleaning, temperature control, etc.). - 35 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 36: Optional Operation

    • To control the room temperature by a wired remote controller, install controller(room temp. sensor) to sense the temperature more accurately. • Maunfactured in the position 3. - 36 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 FLOAT S/W REMOTE CN - DISP CONTROL OPTION TERMINAL TERMINAL DISPLAY PCB BLOCK BLOCK POWER TO INDOOR UNIT INPUT - 37 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38 GN/YL FLOAT S/W REMOTE CN - DISP CONTROL TERMINAL TERMINAL DISPLAY PCB BLOCK BLOCK POWER TO INDOOR UNIT INPUT - 38 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 39: Cycle

    (9) Open the liquid side completely first and then the pipe connection is OK or not. gas side fully in order. Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 40 (5) After the needle of gage indicates below 0 kgf/cm , close the valve of gas side quickly and turn off the power. - 40 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 41: Gas Charging

    1 minute and then repeat the procedure. - 41 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 42: Cycle Troubleshooting Guide

    2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. - 42 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 43: Electronic Parts Troubleshooting Guide

    Exchange IC03D. of IC03D DC5V? Check the Is the PIN 49,58 of 5V P.C.B pattern. MICOM. DC5V? Exchange MICOM. - 43 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 44 Adjust set temperature. set all right? Is IC01M operated Change IC01M. normally? Is 4way-valve operated? Check RY-4Way. Check the connector. (CN-OUT) - 44 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 45 Check the wired Remocon Is the pin 39, 40 of PCB and DC 12V pattern. Micom DC 5V? Change the wired Remocon. - 45 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 46: Electronic Control Device

    Electronic control device I MAIN P.C.B ASM - 46 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 47: Schematic Digram

    Schematic Digram R05T R04T R03T R02T R01T R06T - 47 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 48: Exploded View

    Exploded View 1. Indoor Unit 266090 249951 268711B 159830 354212 35211A 352118 263230A 158591 266010 330870 - 48 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 349600 W0CZZA 346810 359012 146811 268711A 140570 152312 130911B 135800 135303 137211 130911A 352150A 267110A 267110B Accessory 352150B Option - 49 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50 Elevation Grille 137211 W4811-1 146812-1 W4811-2 146812-2 668713 249951 750830 268712 266011-2 146811 146811 266011-2 152312 267110 435310 - 50 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51 2. Outdoor Unit - 51 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 52 JUNE, 2008 P/NO : 3828A20048D...

This manual is also suitable for:

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