LG LT1030HR Service Manual
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LG LT1030HR Service Manual

LG LT1030HR Service Manual

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

SERVICE MANUAL

MODEL: LT1030HR, LT1230HR
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 LT1030HR

  • Page 1: Service Manual

    LG Room Air Conditioner SERVICE MANUAL MODEL: LT1030HR, LT1230HR website http://www.lgservice.com CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.

  • Page 2: Table Of Contents

    Air Handling Parts ...18 Electrical Parts ...19 Refrigeration Cycle...21 Schematic Diagram...24 Wiring Diagram...24 Troubleshooting Guide ...25 Piping System ...25 Troubleshooting Guide ...26 Room Air Conditioner Voltage Limits...29 Product specifications...31 Exploded View ...32 Replacement Parts List ...33 2 Room Air Conditioner...

  • Page 3: 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 Cool Energy Saver Heat MODE Timer TIMER TEMP SPEED POWE 4 Room Air Conditioner Do not share the outlet with other appliances. • It will cause electric shock or fire due to heat generation. Cool Saver Energ Heat Timer TIME...
  • Page 5 Do not operate or stop the unit by inserting or pulling out the power plug. • It will cause electric shock or fire due to heat generation. Cool Energ Saver Heat Time TIME SPEE Hold the plug by the head when taking it out.
  • Page 6 • It may cause injury. Energ Cool Save Heat Time TIME 6 Room Air Conditioner Do not block the inlet or outlet of air flow. • It may cause product failure. Saver Energ Cool Heat Time...

  • Page 7: Installation

    Install the new air conditioner according to these instal- lation instructions to achieve the best performance. All wall sleeves used to mount the new air conditioner must be in good structural condition and have a rear grille to securely attach the new air conditioner.

  • Page 8: Installation

    3. Clean the interior of an existing sleeve. (Do not disturb seals.) 4. Wall sleeve must be securely fastened in wall before installing the air conditioner. Use the nails or screws through sleeve into wall, if needed. Repaint sleeve if needed.

  • Page 9: Procedure A

    6. To assemble trim, snap the tab of each piece into the slot of the other piece as shown below. Slide trim over the front of the air conditioner until trim is FIG. 4 flush with sleeve as shown below.

  • Page 10: Procedure B

    Fasten the screws 10 Room Air Conditioner 4. Remove the backing from the Horizontal Insulation strip 1 tom of the sleeve as shown below. Remove the...
  • Page 11 9.To assemble trim, snap the tab of each piece into the slot of the other piece as shown below. Slide trim over the front of the air conditioner until trim is flush with sleeve as shown below. Trim (2 ea) Wall •...

  • Page 12: Procedure C

    Fasten the screws 12 Room Air Conditioner 4. Remove the backing from the Horizontal Insulation strip 1 bottom of the sleeve as shown below. Remove the...
  • Page 13 10. To assemble trim, snap the tab of each piece into the slot of the other piece as shown below. Slide trim over the front of the air conditioner until trim is flush with sleeve as shown below. " High FIG.

  • Page 14: Operating Instructions

    60 F to 86 F by increments of 1 F. • The setting appears in the display. POWER POWER • To turn the air conditioner ON, push this button. To turn the air conditioner OFF, push the button again. • This button takes priority over any other button.

  • Page 15: Remote Control

    The remote control and control panel will look like one of the following pictures. POWER • To turn the air conditioner ON, push this button. To turn the air conditioner OFF, push the button again. • This button takes priority over any other button.

  • Page 16: How To Insert Batteries

    Such batteries differ from standard dry cells in shape, dimensions, and performance. • Remove the batteries from the remote controller if the air conditioner is not going to be used for an extend- ed length of time. PULL OPEN / PUSH CLOSE...

  • Page 17: Disassembly Instructions

    Disassembly Instructions — 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 18: Air Handling Parts

    4. Move the condenser sideways carefully. 5. Remove the clamp which secures the fan. 6. Remove the fan. (See Fig. 34) 7. Re-install the components by referring to the removal procedure, above. 18 Room Air Conditioner FIG. 30 FIG. 31 FIG. 32 FIG. 33...

  • Page 19: Electrical Parts

    6. SHROUD 1. Remove the fan. (Refer to section 5) 2. Remove the screw which fasten the shroud. 3. Remove the shroud. (See Fig. 35) 4. Re-install the component by referring to the removal procedure, above. Electrical Parts 7. MOTOR 1.
  • Page 20 2. Unfold the control box. (Refer to section 9) 3. Disconnect the theristor terminals from main P.W.B assembly. 4. Remove the thermostat. (See Fig. 40) 5. Re-install the components by referring to the removal procedure, above. 20 Room Air Conditioner for ground FIG. 39 FIG. 40...

  • Page 21: Refrigeration Cycle

    Refrigerating 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 vent- ing the Freon . Leave the valve in place after servicing the system.
  • Page 22 Open valve C. Discharge the line at the manifold connection. 5) The system is now ready for final charging. 22 Room Air Conditioner 6. Recharge as follows : 1) Refrigeration cycle systems are charged from the High-side. If the total charge cannot be put...
  • Page 23 Disassembly Instructions 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. FIG. 43A-Pulling Vacuum FIG 43B-Charging Service Manual 23...

  • Page 24: Schematic Diagram

    Schematic Diagram Schematic Diagram Wiring Diagram ELECTRIC HEATING MODEL 24 Room Air Conditioner...

  • Page 25: Troubleshooting Guide

    Refer to Fig. 44 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle. EVAPORATOR COILS COMPLETE LIQUID BOIL OFF POINT COOLED ROOM AIR HEAT LOAD LIQUID PRESSURE DROP ROOM AIR CONDITIONER CYCLE OF REFRIGERATION SUCTION LIME COOL LOW PRESSURE VAPOR OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH MOTOR COMPRESSOR...

  • Page 26: Troubleshooting Guide

    Obstruction at air outlet Stop of auto air-swing Correct above trouble Check clogging in refrigeration circuit. Repair clogging in refrigeration circuit. 26 Room Air Conditioner Ineffective Cooling Check of outdoor coil (heat exchanger) & the fan operation. Check gas leakage. Repair gas leak.
  • Page 27 Check of power source. Check of control switch setting. Only compressor fails to start. Drop of power voltage. Defect of compressor capacitor. Check capacitor. Replacement. Irregular motor resistance ( ) Irregular motor insulation ( ) Replacement of compressor (Motor damaged) Fails to Start Improper thermostat setting Loose terminal connection.
  • Page 28 Fan motor noise. Grommets Turbo fan Loose set screw Worn bearings 28 Room Air Conditioner CAUSE Check voltage at outlet. Correct if none. Check voltage to rotary switch. If none, check power supply cord. Replace cord if circuit is open.

  • Page 29: Room Air Conditioner Voltage Limits

    Rotary Thermostat Capacitor (Discharge capacitor before servicing.) Compressor Overload ROOM AIR CONDITIONER VOLTAGE LIMITS NAME PLATE RATING 115V 208/230V CAUSE Check voltage. See the limits on the preceding. page. If not within limits, call an electrician. Check the wire connections, if loose, repair or replace the terminal.
  • Page 30 Exhaust damper door Unit undersized Excessive noise. Blower or fan Copper tubing 30 Room Air Conditioner CAUSE Check the voltage. See the limits on the preced- ing page. If not within limits, call an electrician. Check overload, if externally mounted.

  • Page 31: Product Specifications

    (inch) (W x H x D) (mm) SLEEVE DIMESION (inch) (W x H x D) (mm) SLEEVE DEPTH (inch) WITH FRONT GRILLE (mm) LT1030HR 1Ø, 208/ 230V, 60Hz 9,800/10,000 1,040/1,060 5.2/4.7 9,200/11,200 2,900/3,500 14.0/15.3 26.7 (DB) 35 (DB) 21.1 (DB) 8.3 (DB)

  • Page 32: Exploded View

    Exploded View 135312 749180 352390 349480 753010 753011 354210 359012 W48602 263230 268716 238310 237200 264110 W0CZZ 32 Room Air Conditioner 147582-1 147582-2 147581 152302 135313 349001 148000 149980 346811 349600 249951 267110 249940 268714 352115 35211A 352113 130900 435301...

  • Page 33: Replacement Parts List

    VALVE, DRAIN 554030 CONDENSER ASSEMBLY,BENT 559011 FAN ASSEMBLY,AXIAL W48602 CLAMP,SPRING 130410 BASE ASSEMBLY,SINGLE 130900 CABINET 749180 FRAME 267110 REMOTE CONTROLLER ASSEMBLY PART NO. LT1030HR LT1230HR 4995A20811A 6411A20048L 3831A10044B 6323A20003F 4994A10096A 3720A10305A 6871A10188D 6871A20802A 6120AR2194D 2520UTBK055 2520UKHK2AA 4H00982E 4H00982E 6750U-L028A 6750U-L039A...
  • Page 34 P/No.: 3828A20040J Printed in Korea...

This manual is also suitable for:

Lt1230hr

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