LG BG-101A Service Manual
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LG BG-101A Service Manual

Room air conditioner
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ROOM AIR CONDITIONER

SERVICE MANUAL

CAUTION
- BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
- ONLY FOR AUTHORIZED SERVICE
MODEL: BG-81A/LT0810CR/LT080CSG
BG-101A/LT1010CR/LT1030CR
LT1210CR/LT121CSG/BG-123A
LT1230CR/LT1430CR

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Summary of Contents for LG BG-101A

  • 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 MODEL: BG-81A/LT0810CR/LT080CSG BG-101A/LT1010CR/LT1030CR LT1210CR/LT121CSG/BG-123A LT1230CR/LT1430CR...

  • Page 2: Table Of Contents

    SERVICE MANUAL This parts etc. This room air conditioner was manufactured and assembled under a strict quality control system. The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit. 1.1 SAFETY PRECAUTIONS 1.

  • Page 3: Specifications

    1.3 SPECIFICATIONS 1.3.1 FOR BG-101A/LT1010CR/LT121CSG/LT1210CR /LT0810CR/LT080CSG/BG-81A MODELS ITEMS POWER SUPPLY COOLING CAPACITY (Btu/h) INPUT RUNNING CURRENT (A) E.E.R (Btu/w.h) REFRIGERANT (R-22) CHARGE(g) OPERATING INDOOR (°C) TEMPERATURE OUTDOOR (°C) EVAPORATOR CONDENSER FAN, INDOOR FAN, OUTDOOR FAN SPEEDS, FAN/COOLING FAN MOTOR OPERATION CONTROL ROOM TEMP.
  • Page 4 1.3.2 FOR LT1030CR/LT1230CR/BG-123A/LT1430CR MODELS ITEMS POWER SUPPLY COOLING CAPACITY INPUT RUNNING CURRENT E.E.R. (Btu/W.h) INDOOR (°C) OPERATING TEMPERA-TURE OUTDOOR (°C) REFRIGERANT (R-22) CHARGE(g) EVAPORATOR CONDENSER FAN, INDOOR FAN, OUTDOOR FAN SPEEDS (FAN/COOLING/HEATING) FAN MOTOR OPERATION CONTROL ROOM TEMP. CONTROL AIR DIRECTION CONTROL CONSTRUCTION COMPRESSOR PROTECTOR...

  • Page 5: Features

    • 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. • When you first turn it on, the unit is in cool mode, High fan speed, Temperature setting at 72°F.

  • Page 6: Disassembly Instructions

    2. DISASSEMBLY INSTRUCTIONS — Prior to disassembling the unit, make sure that the POWER is off and the power cord is unplugged from the wall receptacle. 2.1 MECHANICAL PARTS 2.1.1 FRONT GRILLE 1. Open the inlet grille downward. 2. Remove the screw which fastens the front grille. 3.

  • Page 7: Air Handling Parts

    2.2 AIR HANDLING PARTS 2.2.1 ORIFICE, AND TURBO FAN 1. Remove the front grille. (Refer to section 2.1.1) 2. Remove the cabinet. (Refer to section 2.1.2) 3. Remove the 2 screws which fasten the evaporator at the left side and the right side. (See Fig.

  • Page 8: Shroud

    2.2.3 SHROUD 1. Remove the fan. (Refer to section 2.2.2) 2. Remove the shroud. (See Fig. 9) 3. Re-install the components by referring to the removal procedures, above. 2.3 ELECTRICAL PARTS 2.3.1 MOTOR 1. Remove the cabinet. (Refer to section 2.1.2) 2.

  • Page 9: Power Cord

    2.3.4 POWER CORD 1. Remove the control box. (Refer to section 2.1.3) 2. Unfold the control box. (Refer to section 2.3.3) 3. Disconnect the grounding screw from the Base pan. 4. Disconnect 2 receptacles. 5. Remove a screw which fastens the clip cord. 6.

  • Page 10: Refrigeration Cycle

    2.4 REFRIGERATION CYCLE CAUTION Discharge the refrigerant system using a 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.
  • Page 11 NOTES — Replacement of the refrigeration cycle. 1. When replacing the refrigeration cycle, be sure to discharge the refrigerant system using a 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 .
  • Page 12 Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pinch-off tool capable of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve. Figure 17A-Pulling Vacuum Figure 17B-Charging —12—...

  • Page 13: Installation

    Install the new air conditioner according to these installation 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 compatible rear grille in order to securely attach the new air conditioner. (FIG. 18A) With the FRIEDRICH USC sleeve, you can maintain the best performance of the new air conditioner.

  • Page 14: Installation

    Clean the interior of an existing sleeve. (Do not disturb seals.) 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. Prepare the wall sleeve for installation of the unit. If you plan to use your existing wall sleeve, and it is not FRIEDRICH, use procedure B or C below.

  • Page 15: Procedurea

    • Air conditioners covered in this manual pose an and attach that and attach that • When handling the air conditioner, be careful to avoid Outdoor • Make sure air conditioner does not fall during • If unit does not operate after installation check, to be "...

  • Page 16: Procedure B

    PROCEDURE B Redirect the louvers at the back of the wall sleeve to 60° angle as shown in the FIG 8. The use of pliers is recommended. 60° 60° Rear Louvers Rear Louvers (Top View) (Top View) If the wall sleeve already has a rear grille, skip to step 4.
  • Page 17 To prevent injury or strain, use proper lifting and carrying techniques when moving unit. • When handling the air conditioner, be careful to avoid cuts from sharp metal fins on front and rear coils. • Make sure air conditioner does not fall during removal.

  • Page 18: Procedure C

    3.5 PROCEDURE C Redirect the louvers at the back of the wall sleeve to 60° angle as shown in the FIG 30. The use of pliers is recommended. 60° Rear Louvers (Top View) If the wall sleeve already has a rear grille, skip to step 4. If the wall sleeve does not have a rear grille or louvered panel, install the plastic grille from the kit.
  • Page 19 To prevent injury or strain, use proper lifting and carrying techniques when moving unit. • When handling the air conditioner, be careful to avoid cuts from sharp metal fins on front and rear coils. " High •...

  • Page 20: Outside Dimensions

    Refer to Fig. 41 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle. EVAPORATOR COILS COOLED LIQUID PRESSURE DROP " ROOM AIR CONDITIONER CYCLE OF REFRIGERATION SUCTION LIME COMPLETE LIQUID COOL LOW PRESSURE VAPOR BOIL OFF POINT ROOM AIR HEAT LOAD...

  • Page 21: Troubleshooting Guide

    4.3 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. Unit is running but cooling is ineffective Check cold air circulation for smooth flow.
  • Page 22 Check power source. Check control switch setting. Only compressor fails to start. Drop in power voltage. Defective 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 23 COMPLAINT Fan motor will not run. No power Power supply cord Rotary switch Wire disconnected or connection loose Capacitor (Discharge capacitor before testing.) Will not rotate Fan motor runs Revolves on overload. intermittently Fan motor noise. Grommets Turbo fan Loose set screw Worn bearings CAUSE Check voltage at outlet.

  • Page 24: 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 25 COMPLAINT Compressor cycles Voltage on overload. Overload Fan motor Condenser air flow restriction Condenser fins (damaged) Capacitor Wiring Refrigerating system Insufficient cooling or Air filter heating Exhaust damper door Unit undersized Excessive noise. Blower or fan Copper tubing CAUSE Check the voltage. See the limits on the preced- ing page.

  • Page 26: Schematic Diagram

    5. SCHEMATIC DIAGRAM 5.1 CIRCUIT DIAGRAM • MODEL : BG-101A/LT1010CR/LT121CSG/LT1210CR /LT0810CR/LT080CSG/BG-81A LT1030CR/LT1230CR/BG-123A/LT1430CR —26—...

  • Page 27: Exploded View

    6. EXPLODED VIEW • MODEL: BG-101A/LT1010CR/LT121CSG/LT1210CR /LT0810CR/LT080CSG/BG-81A LT1030CR/LT1230CR/BG-123A/LT1430CR 152302 135303 359012 W48602 354210 349480 731273 264110 268711-2 567480 268711-1 238310 237200 267110 132100 147581 147582-1 147582-2 135312 346811 352380 130410 249950 352115 35211A W0CZZ 352113 —27 — 131400 149980 435300...

  • Page 28: Replacement Parts List

    7. REPLACEMENT PARTS LIST• MODEL: LT1030CR Location No. Part No. 130410 3041A10046J 131400 3090A20017J 135303 3530A10272A 135312 3531A18004B 147581 4758A20058A 147582-1 4758A30045A 147582-2 4758A30045B 149980 4998A20003A 237200 MGC35987201 238310 3831A10037F 249950 ABQ32922011 263230 6323A20004S 264110 6411A20056T 267110 6711A20093A 268711-1 EBR30852301 268711-2 EBR30851801 346811...
  • Page 29 • MODEL: BG-81A Location No. Part No. 130410 3041A10046J 131400 3090A20017J 135303 3530A10272A 135312 3531A18004B 147581 4758A20058A 147582-1 4758A30045A 147582-2 4758A30045B 147900 4790A11001A 149980 4998A20003A 237200 MGC35987201 238310 3831A10037F 249950 ABQ32922011 263230 6323A20004S 264110 6411A20056T 267110 6711A20093A 268711-1 EBR30852301 268711-2 EBR30851801 346811 4681A20175B...
  • Page 30 • MODEL: LT0810CR Location No. Part No. 130410 3041A10046J 131400 3090A20017J 135303 3530A10272A 135312 3531A18004B 147581 4758A20058A 147582-1 4758A30045A 147582-2 4758A30045B 147900 4790A11001A 149980 4998A20003A 237200 MGC35987201 238310 3831A10037F 249950 ABQ32922011 263230 6323A20004S 264110 6411A20056T 267110 6711A20093A 268711-1 EBR30852301 268711-2 EBR30851801 346811 4681A20175B...
  • Page 31 Location No. Part No. 130410 3041A10046J 131400 3090A20017J 135303 3530A10272A 135312 3531A18004B 147581 4758A20058A 147582-1 4758A30045A 147582-2 4758A30045B 147900 4790A11001A 149980 4998A20003A 237200 MGC35987201 238310 3831A10037F 249950 ABQ32922011 263230 6323A20004S 264110 6411A20056T 267110 6711A20093A 268711-1 EBR30852301 268711-2 EBR30851801 346811 4681A20175B 349480 4948A20045A 352113...
  • Page 32 • MODEL: BG-101A Location No. Part No. 130410 3041A10046J 131400 3090A20017J 135303 3530A10272A 135312 3531A18004B 147581 4758A20058A 147582-1 4758A30045A 147582-2 4758A30045B 149980 4998A20003A 237200 MGC35987201 238310 3831A10037F 249950 ABQ32922011 263230 6323A20004S 264110 6411A20056T 267110 6711A20093A 268711-1 EBR30852301 268711-2 EBR30851801 346811...
  • Page 33 • MODEL: LT1010CR Location No. Part No. 130410 3041A10046J 131400 3090A20017J 135303 3530A10272A 135312 3531A18004B 147581 4758A20058A 147582-1 4758A30045A 147582-2 4758A30045B 149980 4998A20003A 237200 MGC35987201 238310 3831A10037F 249950 ABQ32922011 263230 6323A20004S 264110 6411A20056T 267110 6711A20093A 268711-1 EBR30852301 268711-2 EBR30851801 346811 4681A20175B 349480 4948A20045A...
  • Page 34 • MODEL: LT1210CR Location No. Part No. 130410 3041A10046J 131400 3090A20017J 135303 3530A10272A 135312 3531A18004B 147581 4758A20058A 147582-1 4758A30045A 147582-2 4758A30045B 149980 4998A20003A 237200 MGC35987201 238310 3831A10037F 249950 ABQ32922011 263230 6323A20004S 264110 6411A20056T 267110 6711A20093A 268711-1 EBR30852301 268711-2 EBR30851801 346811 4681A20175B 349480 4948A20045A...
  • Page 35 Location No. Part No. 130410 3041A10046J 131400 3090A20017J 135303 3530A10272A 135312 3531A18004B 147581 4758A20058A 147582-1 4758A30045A 147582-2 4758A30045B 149980 4998A20003A 237200 MGC35987201 238310 3831A10037F 249950 ABQ32922011 263230 6323A20004S 264110 6411A20056T 267110 6711A20093A 268711-1 EBR30852301 268711-2 EBR30851801 346811 4681A20175B 349480 4948A20045A 352113 5211A21421H 352115...
  • Page 36 • MODEL: LT1230CR Location No. Part No. 130410 3041A10046J 131400 3090A20017J 135303 3530A10272A 135312 3531A18004B 147581 4758A20058A 147582-1 4758A30045A 147582-2 4758A30045B 149980 4998A20003A 237200 MGC35987201 238310 3831A10037F 249950 ABQ32922011 263230 6323A20004S 264110 6411A20056T 267110 6711A20093A 268711-1 EBR30852301 268711-2 EBR30851801 346811 4681A20175B 349480 4948A20045A...
  • Page 37 • MODEL: LT1430CR Location No. Part No. 130410 3041A10046J 131400 3090A20017J 135303 3530A10272A 135312 3531A18004B 147581 4758A20058A 147582-1 4758A30045A 147582-2 4758A30045B 149980 4998A20003A 237200 MGC35987201 238310 3831A10037F 249950 ABQ32922011 263230 6323A20004S 264110 6411A20056T 267110 6711A20093A 268711-1 EBR30852301 268711-2 EBR30851801 346811 4681A20175B 349480 4948A20045A...
  • Page 38 Location No. Part No. 130410 3041A10046J 131400 3090A20017J 135303 3530A10272A 135312 3531A18004B 147581 4758A20058A 147582-1 4758A30045A 147582-2 4758A30045B 149980 4998A20003A 237200 MGC35987201 238310 3831A10037F 249950 ABQ32922011 263230 6323A20004S 264110 6411A20056T 267110 6711A20093A 268711-1 EBR30852301 268711-2 EBR30851801 346811 4681A20175B 349480 4948A20045A 352113 5211A21421G 352115...
  • Page 39 February, 2007 Printed in China P/No.: 3828A20294T...

This manual is also suitable for:

Bg-81aBg-123aLt080csgLt121csgLt1230crLt1030cr ... Show all

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