Table of Contents
Troubleshooting
Related Manuals for LG M2400HR
Summary of Contents for LG M2400HR
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Page 1: Room Air Conditioner
Room Air Conditioner SERVICE MANUAL CAUTION - BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. - ONLY FOR AUTHORIZED SERVICE. MODELS: R1804H/M2400HR/HBLG1800H/LWM1836B5S... -
Page 2: Table Of Contents
Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions............................3 Dimensions..............................5 Installation ...............................6 How to Install the Unit ..........................6 How to use the Reversible Inlet grille ......................6 Window Requirements ..........................7 Installation Kits Contents (some models including installation kit) .............7 Suggested tool Requirements........................8 Cabinet Installation.............................9 Operation ...............................11 Features ..............................11... -
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. • 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.
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Page 5: Dimensions
Dimensions Dimensions Symbols Used in this Manual This symbol alerts you to the risk of electric shock. This symbol alerts you to hazards that could cause harm to the air conditioner. This symbol indicates special notes. NOTICE Outside Dimensions 675(770) Service Manual 5... -
Page 6: Installation
Installation INSTALLATION How to Install the unit 1. To avoid vibration and noise, make sure the unit is installed securely and firmly. 1/4 Bubble 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 7: Window Requirements
Installation Window Requirements All supporting parts should be secured to firm wood, masonry, or metal. NOTICE • WINDOW REQUIREMENTS 1. This unit is designed for installation in standard double hung windows with actual opening widths from 29" to 41". The top and bottom window sashes must open sufficiently to allow a clear vertical opening of 18" from the bot- tom of the upper sash to the window stool. -
Page 8: Suggested Tool Requirements
Installation Suggested tool Requirements SCREWDRIVER(+, -), RULER, KNIFE, HAMMER, PENCIL, LEVEL • PREPARATION OF CHASSIS Shipping screws 1. Remove the screws which fasten the cabinet at both sides and at the back. Keep these two screws which fasten the cabinet at both sides for later use. 2. -
Page 9: Cabinet Installation
Installation Cabinet Installation 1. Open the window. Mark a line on the center of the win- Sill dow stool between the side window stop moldings. Bracket Support Loosely attach the sill bracket to the support bracket Bracket Carriage using the carriage bolt and the lock nut. Lock nut Bolt (M-Screw) - 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. 10) Figure 10 7.
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Page 11: Operation
Operation Operation Features • Powerful and quiet cooling. • Slide-in and slide-out chassis for the simple installation and service. • Reversible inlet grille. • Side air-intake, side cooled-air discharge. • Built in adjustable THERMOSTAT/THERMISTOR. • Washable one-touch filter. • Compact size. Control Locations Function of Controls CAUTION: When the air conditioner has been performing its cooling operation and is turned off or set to the fan position, wait at least 3 minutes before resetting... - Page 12 Operation • OPERATION REMOTE CONTROLLER Power Temp Fan Speed Timer Mode Energy Auto Saver Swing 1. POWER BUTTON To turn the air conditioner ON, push the button. To turn the air conditioner OFF, push the button again. This button takes priority over any other buttons. 2.
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Page 13: Disassembly Instructions
Disassembly Disassembly - Before the following disassembly, power switch is set to off and disconnected the power cord. Mechanical parts 1. Front grille 1. Open the inlet grille upward or downward. 2. Remove the screw which fastens the front grille. 3. -
Page 14: Air Handling Parts
Disassembly Air handling parts 4. Cover (at the top) 1. Remove the front grille. (Refer to section 1) 2. Remove the cabinet. (Refer to section 2) 3. Remove 11 screws which fasten the brace and covers. 4. Remove the covers and the brace. (See Fig. 19) 5. -
Page 15: Electrical Parts
Disassembly 6. Fan 1. Remove the cabinet. (Refer to section 2) 2. Remove the brace and shroud cover. (Refer to section 4) 3. Remove the side cover with 2 screws.(See Fig. 23) 4. Remove the 5 or 6 screws which fasten the condenser. 5. - Page 16 Disassembly 10. CAPACITOR 1. Remove the control box. (Refer to section 3) 2. Remove the screw and knobs which fasten the display panel. 3. Disconnect the 2 leads from the rocker switch and remove the panel. 4. Remove a screw and unfold the control box. (See Fig.
- Page 17 Disassembly 13. THERMISTOR 1. Remove the control box. (Refer to section 3) 2. Unfold the control box. (Refer to section 10) 3. Disconnect the thermistor terminals from main P.W.B assembly. 4. Remove the thermistor. 5. Re-install the components by referring to the removal pro- cedure above.
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Page 18: Refrigeration Cycle
Disassembly Refrigeration cycle CAUTION: Discharge the refrigerant system using Freon Recovery System.If there is no valve to attach the recovery system, install one (such as a WATCO A-1) before venting the Freon . Leave the valve in place after servicing the system. 16. - Page 19 Disassembly NOTICE - Replacement of the refrigeration cycle. 1. When replacing the refrigeration cycle, be sure to 6. Recharge as follows : discharge the refrigerant system using a Freon 1) Refrigeration cycle systems are charged from the recovery System. High-side. If the total charge cannot be put in the If there is no valve to attach the recovery system, High-side, the balance will be put in the suction line install one (such as a WATCO A-1) before venting...
- Page 20 Disassembly Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pinch-off tool capa- ble of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve. Figure 35A-Pulling Vacuum Figure 35B-Charging 20 Room Air Conditioner...
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Page 21: Troubleshooting Guide
Troubleshooting guide Troubleshooting guide Piping system CONDENSER COIL CAPILLARY TUBE MOTOR COMPRESSOR BLOWER EVAPORATOR COIL Following is a brief description of the important components and their functions in the refrigeration system. Refer to Fig. 36 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle. ROOM AIR CONDITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS... -
Page 22: Troubleshooting Guide
Troubleshooting guide Troubleshooting guide In general, possible trouble is classified in two causes. 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. Ineffective Cooling Unit runs but poor cooling Check of cold air circulation... - Page 23 Troubleshooting guide Fails to Start Check of power source. Check of circuit breaker and fuse. Check of control switch Gas leakage of feeler bulb setting. of thermostat Check of control switch. Only compressor fails to Only fan fails to start. start.
- Page 24 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 rotary switch. If none, check power supply cord. Replace cord if circuit is open. Rotary switch Check switch continuity.
- Page 25 Troubleshooting guide COMPLAINT CAUSE REMEDY Compressor will not run, Voltage Check voltage. See the limits on the preceding. but fan motor runs. page. If not within limits, call an electrician. Wiring Check the wire connections, if loose, repair or replace the terminal. If wires are off, refer to wiring diagram for identification, and replace.
- Page 26 Troubleshooting guide REMEDY COMPLAINT CAUSE Capacitor Compressor cycles Test capacitor. on overload. Wiring Check the terminals. If loose, repair or replace. Refrigerating system Check the system for a restriction. Air filter If restricted, clean of replace. Exhaust damper door Close if open. Insufficient cooling or heating Determine if the unit is properly sized for the area to Unit undersized...
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Page 27: Schematic Diagram
Schematic diagram Schematic diagram Electoinc control device Model: M2400HR LED out2 Option2 LED out1 Option1 LED out0 Pipe TH KEY1 Room TH VAref KEY0 SLIDE SW Osc out SEG-g Osc in /Reset SEG-f SEG-e TEST SEG-d Service Manual 27... -
Page 28: Components Location (Main P.w.b Assembly)
Schematic diagram Components location • MAIN P.W.B ASSEMBLY MODEL: M2400HR • DISPLAY P.W.B ASSEMBLY MODEL: M2400HR 28 Room Air Conditioner... -
Page 29: Wiring Diagram
Schematic diagram Wiring diagram R1804H POWER INPUT BK(BR) WH(BL) (Plain) (Ribbed) ROTARY SWITCH GN(GN/YL) RD(BL) BL(RD) BL(RD) MOTOR OR(BR) CAPACITOR OR(BR) WH(BR) BK(BR) THERMOSTAT ROCKER SWITCH SYNC. MOTOR COMP BR(YL) O.L.P FUSE LINK HEATER BI-METAL WIRING DIAGRAM 3854AR3563D THERMOSTAT DESCRIPTION POWER CORD ROTARY SWITCH FAN MOTOR... -
Page 30: Power Cord
Schematic diagram R1804H POWER INPUT WH(BL) BK(BR) (Ribbed) (Plain) GN/YL(GN) THERMISTOR CN-TH MOTOR OR(BR) OR(BR) GN/YL CAPACITOR (GN) SYNC. MOTOR T/B1 BK(OR) OR(BR) RY-SYNC TRANS- FORMER RY-COMP COMP. T/B2 FUSE 250V/T2A CN-SIGNAL (115V/T2A) CN-SIGNAL FUSE LINK HEATER BK(RD) BI-METAL THERMOSTAT BK(RD) SUB P.W.B ASSY WIRING DIAGRAM... -
Page 31: Product Specifications
Product Specifications Product Specifications Table 1 HBLG1800H MODELS R1804H M2400HR REMARK ITEMS LWM1836B5S 1Ø, 208/ 230V, 60Hz 1Ø, 208/ 230V, 60Hz POWER SUPPLY 17,500/ 18,000 23,000/ 23,500 CAPACITY (Btu/h) 1,800/1,850 2,700/2,760 INPUT COOLING 9.0/8.3 13.2/12.2 RUNNING CURRENT (A) E.E.R. (Btu/W.h) -
Page 32: Exploded View
Exploded view Exploded view 554031 130910 148000 352390 W48602 559010 149980 731273 130410 346811 552206 359012 354210 349480 349600 349001 W48602 147582 249950 554160 269310 W0CZZ 550140 135500 137215 146812 552102 149410 352115-1 352115-2 266003 264110 35211A 249950 135312 352111 263230 W0CZZ 35211A... -
Page 33: Replacement Parts List
Replacement Parts list Replacement Parts list R: Service Parts PART NO. LOCATION DESCRIPTION REMARK HBLG1800H R1804H LWM1836B5S 130410 BASE ASSEMBLY, SINGLE 3041A30002B 3041A30002B 3041A30002B 130910 CABINET ASSEMBLY, SINGLE 3091AR6057A 3091AR6057A 3091AR6057B 135303 GRILLE, INLET 3530AR1604A 3530AR1604A 3530A10070A 135312 GRILLE ASSEMBLY, FRONT(SINGLE) 3531A20073M 3531A20005H 3531A20073K... - Page 34 Replacement Parts list R: Service Parts PART NO. LOCATION DESCRIPTION REMARK M2400HR 130410 BASE ASSEMBLY, SINGLE 3041A10010K 130910 CABINET ASSEMBLY, SINGLE 3091AR6056A 135312 GRILLE ASSEMBLY, FRONT(SINGLE) 3531A20073P 135510 COVER ASSEMBLY, CONTROL 3551A30015A 137215 PANEL ASSEMBLY, CONTROL 3720AR6163A 146812 MOTOR ASSEMBLY, SYNC.
- Page 35 Memo Service Manual 35...
- Page 36 P/No.: 3828A20190A Printed in Korea...