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LG L1404R Service Manual

Room air conditioner
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See also: Owner's Manual
LG Room
Air Conditioner

SERVICE MANUAL

MODEL: L1404R
website http://www.lgservice.com
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
LG

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Summary of Contents for LG L1404R

  • Page 1: Service Manual

    LG Room Air Conditioner SERVICE MANUAL MODEL: L1404R CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.

  • Page 2: Table Of Contents

    Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions............................3 Dimensions ..............................5 Outside dimensions............................5 Product Specifications ..........................6 Installation ...............................7 Select the Best Location ...........................7 Installation Check ............................7 How to Secure the Drain Pipe ........................7 How to Install..............................8 Cabinet Installation.............................9 Operation ..............................11 Function of Controls ..........................11 Disassembly ..............................12 Mechanical Parts............................12...

  • Page 3: Safety Precautions

    Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. WARNING This symbol indicates the possibility of death or serious injury.
  • Page 4 Safety Precautions Do not modify or extend the power cord. Do not install, remove, or re-install the unit by yourself(customer). • There is risk or fire or electric shock. • There is risk of fire, electric shock, explosion, or injury. Be cautious when unpacking and installing Do not store or use flammable gas or com- the product.

  • Page 5: Dimensions

    This symbol alerts you to hazards that could cause harm to the air conditioner. This symbol indicates special notes. NOTICE Outside Dimensions Cool F1 LOW F2 MED Energy F3 HIGH Saver TEMP Timer MODE TIMER POWER SPEED Model L1404R Dimension mm(inch) 660(25 mm(inch) 428(16 mm(inch) 680(26 Service Manual 5...

  • Page 6: Product Specifications

    Specfications Product Specifications MODELS L1404R ITEMS POWER SUPPLY 1ø, 115V, 60Hz CAPACITY (BTU/h) 13,500 INPUT 1,380 COOLING RUNNING CURRENT (A) 12.0 E.E.R (BTU/W.h) CAPACITY (BTU/h) INPUT HEATING RUNNING CURRENT (A) E.E.R (BTU/W.h) OPERATING INDOOR (°C) 26.7(DB)* 19.4(WB)** CONDITION OUTDOOR (°C) 35(DB)* 23.9(WB)**...

  • Page 7: Installation

    Installation Installation Select the Best Location 1. To avoid vibration and noise, make sure the unit is installed 1/4 Bubble securely and firmly. 2. Install the unit where the sunlight does not shine directly on the unit. If the unit receives direct sunlight, build an awning to shade the cabinet.

  • Page 8: How To Install

    Installation How to Install When Using Installation Kits 1. Window Requirements 29" to 41" This unit is designed for installation in standard double hung windows with actual opening 18" min Stool Offset widths from 29" to 41". The top and bottom window sash must open suffi- Less 1 "...

  • Page 9: Cabinet Installation

    Installation Cabinet Installation 1. Open the window. Mark a line on the center of the window stool between the side window stop moldings. Sill Bracket Loosely attach the sill bracket to the support bracket using Support Bracket the carriage bolt and the lock nut. Carriage Lock nut Bolt...
  • Page 10 Installation 5. Pull each Frame curtain fully to each window sash track, and pull the bottom window sash down behind the Top retainer bar until it meets. 6. Attach each Frame curtain the window sash by using screws (Type C). (See Fig. 7) Figure 7 7.

  • Page 11: Operation

    Operation Operation Function of Controls • Designed for COOLING ONLY. • Built-in adjustable Thermistor • Powerful and quiet cooling. • Washable one-touch filter • Slide-in and slide-out chassis for the simple instal- • Compact size lation and service. • Equipped with reliable and efficient rotary •...

  • Page 12: Disassembly

    Disassembly Disassembly — Before the following disassembly, CONTROL BOX set to OFF and disconnect the power cord. Mechanical Parts 1. Front Grille 1. Open the lnlet grille downward and remove the air filter. 2. Remove the screw that fastens the front grille.(See Figure 13) 3.

  • Page 13: Air Handling Parts

    Disassembly Air Handling Parts 4. Air Guide and Turbo Fan 1. Remove the front grille. (Refer to section 1) 2. Remove the cabinet. (Refer to section 2) 3. Remove the control box. (Refer to section 3) 4. Remove the 4 screws that fasten the brace. 5.

  • Page 14: Electrical Parts

    Disassembly 6. Shroud 1. Remove the fan. (Refer to section 5) 2. Remove the shroud. (See Figure 20) 3. Re-install the components by referring to the removal procedure, above. Figure 20 Electrical Parts 7. Overload Protector 1. Remove the cabinet. (Refer to section 2) 2.
  • Page 15 Disassembly 9. Capacitor 1. Remove the control box. (Refer to section 3) 2. Open the top cover from the control box. (See Figure 23) 3. Pull out the capacitor from the control box. 4. Disconnect all the leads of capacitor terminals. 5.

  • Page 16: Refrigerating Cycle

    Disassembly 11. Motor 1. Remove the cabinet. (Refer to section 2) 2. Remove the turbo fan. (Refer to section 4) 3. Remove the fan. (Refer to section 5) 4. Remove the 4 screws that fasten the motor from the air guide. (See Figure 25) 5.

  • Page 17: Capillary Tube

    Disassembly 14. Capillary Tube 3. Remove the capillary tube. 1. Remove the cabinet. (Refer to section s2) 4. Re-install the components by referring to notes. 2. After discharging the refrigerant completely, unbraze the interconnecting tube at the capillary tube.(See caution above) NOTICE —...
  • Page 18 Disassembly Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pin-off tool capable of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve. Figure 28B-Charging Figure 28A-Pulling Vacuum 18 Room Air Conditioner...

  • Page 19: Schematic Diagram

    Schematic Diagram Schematic Diagram Electronic Control Device Service Manual 19...

  • Page 20: Wiring Diagram

    Schematic Diagram Wiring Diagram CN-AC/DC CN-AC/DC CN-MOTOR GN/YL MOTOR DC PCB ASSEMBLY CAPACITOR CN-TH1 POWER TRANS THERMISTOR CN-PWR SWITCH DC12V FUSE CN-12V Ribbed 250V/T3.15A H.V. CN-HVB Plain ASSEMBLY GN/YL RY-COMP COMP. AC PCB ASSEMBLY AIR FILTER WIRING DIAGRAM 3854AR3563P ASSEMBLY S: Service Parts N: Non Service Parts REMARKS...

  • Page 21: Components Location

    Schematic Diagram Components Location 1. MAIN P.C.B ASSEMBLY R01T Q01T CN-MOTOR CN-HVB CN-TELE CN-TH2 Q03T C03T Q04T CN-PWR QIC02DT CN-4WAY ZNR01J C01J R01J C02D C04D C05D E03J E02J E01J C01D E04J E05J POWER TRANS RY-COMP FUSE ASSEMBLY:6871A20167 2. DISPLAY P.C.B. ASSEMBLY CN-AC/DC R01G R02G...

  • Page 22: Troubleshooting Guide

    Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER COIL CAPILLARY TUBE MOTOR COMPRESSOR TURBO FAN EVAPORATOR COIL Figure 29 is a brief description of the important components and their function in what is called the refrigeration system. This will help you to understand the refrigeration cycle and the flow of the refrigerant in the cooling cycle. ROOM AIR CONITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS...

  • Page 23: Troubleshooting Guide

    Troubleshooting Guide Troubleshooting Guide In general, possible trouble is classified in two kinds. The one is called Starting Failure which is caused from an electrical defect, and the other is ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application. Unit runs but poor cooling.
  • Page 24 Troubleshooting Guide Fails to Start Check of power source. Check circuit breaker and fuse. Check of control switch Gas leakage of feeler bulb setting. of thermostat Check of control switch. Compressor only fails to Fan only fails to start. start. Improper wiring.

  • Page 25: Electrical Parts Troubleshooting Guide

    Troubleshooting Guide Electrical Parts Troubleshooting Guide Possible Trouble 1 The unit does not operate. Is the • Check the Fuse. Trans input power AC 115V? • Check the Fuse. • Check the wiring diagram. (208/230V for LWL1230WAL) • Check the wiring diagram. •...
  • Page 26 Troubleshooting Guide Possible Trouble 2 The compressor does not operate. Is setting • Select the setting Temp. to lower Number. Temp. set lower than Room Temp.-0.5 C? Is the voltage No.10 Is the voltage N0.9 of Does the Unit delay for of IC01M 0V? IC01M DC 12V? 3 minutes?
  • Page 27 Troubleshooting Guide Possible Trouble 4 FAN does not operate. Is the voltage NO.1 or 2 or 4 • Replace IC01M. of IC01M DC 12V? Is the voltage NO.16 or 15 or 13 • Replace IC01M. of IC01M 0V? • Check the RY-Hi or RY-Med or RY-Lo.
  • Page 28 Troubleshooting Guide Possible Trouble 6 Remote controller does not operate. Is the voltage of Battery • Replace the battery. over 2.3V? Is the voltage No.10 • Check the PCB pattern. of CN-AC/DC on DC PCB • Check the PCB pattern. Ass'y DC 5V? •...

  • Page 29: Electric Parts

    Troubleshooting Guide ElectrIc Parts Possible Trouble 1 The unit does not operate. Is the • Check the Fuse. Trans input power AC 115V? • Check the Fuse. • Check the wiring diagram. (208/230V for LWL1230WAL) • Check the wiring diagram. •...
  • Page 30 Troubleshooting Guide Possible Trouble 2 The compressor does not operate. Is desired • Select the desired Temp. to lower Number. Temp. set lower than Room Temp.-0.5 C? Is the voltage No.10 Is the voltage N0.9 of Is the Unit for 3 minutes of IC01M 0V? IC01M DC 12V? delay?
  • Page 31 Troubleshooting Guide Possible Trouble 4 FAN does not operate. Is the voltage NO.1 or 2 or 4 • Replace IC01M. of IC01M DC 5V? Is the voltage NO.16 or 15 or 13 • Replace IC01M. of IC01M 0V? • Check the RY-Hi or RY-Med or RY-Lo.
  • Page 32 Troubleshooting Guide Possible Trouble 6 It displays abnormally on DC PCB Ass’y. • Replace IC01G, Are the IC01G and IC02G IC02G. good? • Connect connector Is the connection of to CN-AC/DC exactly. CN-AC/DC OK? Does IC03G • Replace IC03G. operate normally on AC PCB Ass'y? •...
  • Page 33 Troubleshooting Guide COMPLAINT CAUSE REMEDY Fan motor will not run. No power Check voltage at outlet. Correct if none. Power supply cord Check voltage to Control Box. If none, check power supply cord. Replace cord if circuit is open. Wire disconnected or con- Connect wire.
  • Page 34 Troubleshooting Guide COMPLAINT CAUSE REMEDY Compressor will not run, Thermistor Check the TEMP control. If not at the lowest number, but fan motor runs. set TEMP control to this setting and restart the unit. Check the continuity of the thermistor. Replace the thermistor if the circuit is open.

  • Page 35: Exploded View

    Exploded View Exploded View 130910 559010 554031 149980 148000 346811 W48602 359012 352390 W48602 349480 152312 349600 354210 267110 147582-1 147581 349001 567502 147582-2 135312 554160 152302 130410 135303 550140 W52106-1 352111 249950 268714 W0CZZ 135500 268712 W52106-2 D ES 238310 A IR FI ER...

  • Page 36: Replacement Parts List

    Replacement Parts List Replacement Parts List PART NO. LOCATION DESCRIPTION REMARK L1404R 130410 BASE ASSEMBLY, WELD[SINGLE] 3041A20023V 130910 CABINET ASSEMBLY, SINGLE 3091AR6057J 135312 GRILLE ASSEMBLY, FRONT(SINGLE) 3531A20095A 135303 GRILLE, INLET 3530A10080A 135500 COVER 3550A30122A 147581 LOUVER, HORIZONTAL 4758A30022A 147582-1 LOUVER, VERTICAL...
  • Page 37 Memo Service Manual 37...
  • Page 38 Memo 38 Room Air Conditioner...
  • Page 39 June, 2004 P/No.: 3828A20306U Printed in Korea...

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