LG LT1030HR Service Manual Download Page 5

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Service Manual 5

Safety Precautions

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.

Do not damage or use an
unspecified power cord.

• It will cause electric shock or fire.

Do not operate with wet hands
or in damp environment.

• It will cause electric shock.

Hold the plug by the head when
taking it out.

• It may cause electric shock and

damage.

When gas leaks, open the win-
dow for ventilation before oper-
ating the unit.

• Otherwise, it may cause explo-

sion, and a fire.

Never touch the metal parts of
the unit when removing the fil-
ter.

• They are sharp and may cause

injury.

Install the product so that the noise or hot wind
from the outdoor unit may not cause any damage
to the neighbors.

• Otherwise, it may cause dispute with the neighbors.

Keep level parallel in installing the product.

• Otherwise, it may cause vibration or water leakage.

TIM

Fan
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Sav

Tim

F1 L

F2 H

IGH

TIM

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Sav

Tim

F2 H

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Tim

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CAUTION

■

Installation

Summary of Contents for LT1030HR

Page 1: ...om Air Conditioner SERVICE MANUAL LG MODEL LT1030HR LT1230HR CAUTION website http www lgservice com BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL ONLY FOR AUTHORIZED SERVICE PERSONNEL ...

Page 2: ...ions 14 Controls 14 Remote control 15 How to insert batteries 16 Ventilation Control 16 Air Direction 16 Disassembly instructions 17 Mechanical Parts 17 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 Vi...

Page 3: ...e it may cause a fire or electrical shock Do not modify or extend the power cord length It will cause electric shock or fire due to heat generation Do not disassemble or modify products It may cause failure and electric shock Be caution when unpacking and installing Sharp edges may cause injury Do not use the power cord near flam mable gas or combustibles such as gasoline benzene thinner etc It ma...

Page 4: ...nter after taking the power plug out from the socket Ventilate the room well when using this appliance together with a stove etc An oxygen shortage may occur Turn off the power and breaker firstly when cleansing the unit Since the fan rotates at high speed during operation it may cause injury Turn off the main power switch when not using it for a long time Prevent accidental startup and the possib...

Page 5: ...ts of the unit when removing the fil ter They are sharp and may cause injury Install the product so that the noise or hot wind from the outdoor unit may not cause any damage to the neighbors Otherwise it may cause dispute with the neighbors Keep level parallel in installing the product Otherwise it may cause vibration or water leakage MODE TIMER POWER FAN SPEED Fan Heat Energy Saver Cool Timer TEM...

Page 6: ...ill make you sick Be cautious not to touch the sharp edges when installing It may cause injury Avoid excessive cooling and perform ventilation sometimes Otherwise it may do harm to your health Do not insert the hands or bars through the air inlet or outlet during operation Otherwise it may cause person al injury Operation MODE TIMER POWER FAN SPEED Fan Heat Energy Saver Cool Timer TEMP F F1 LOW F2...

Page 7: ... 32 626 mm 18 458 mm 19 21 32 499 mm MOD E TIME R POW ER FAN SPEE D Fan Heat Energ y Saver Cool Timer TEMP F F1 LOW F2 HIGH 1 4 5 6 7 3 2 8 2 Size options 2 Size options 9 To avoid risk of personal injury property damage or product damage due to the weight of this device and sharp edges that may be exposed Air conditioners covered in this manual pose an excessive weight hazard Two or more people a...

Page 8: ...eve NOTICE 8 Room Air Conditioner Installation Installation How to Install We strongly recommend the removal of the old wall sleeve and the installation of a new LGE Wall Sleeve If you decide to keep the existing wall sleeve you have to redirect the louvers at the back of the wall sleeve illus tration The use of pliers is recommended If you DO NOT redirect you run the risk of poor performance or p...

Page 9: ... the metal rear grille and replace it with the plastic rear grille to improve unit energy efficiency The plastic grille reduces the amount of hot air dis charge that recirculates through the unit 5 Install the new unit into the wall sleeve 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 flu...

Page 10: ...strip 13 8 x 5 8 x 273 16 and attach that to the inside bot tom of the sleeve as shown below Remove the backing from the Around Insulation strip 13 8 x 3 4 x 611 2 and attach that to the inside front of the sleeve as shown below 5 Remove the metal rear grille and replace it with the plastic rear grille to improve unit energy efficiency The plastic grille reduces the amount of hot air dis charge th...

Page 11: ... trim is flush with sleeve as shown below Wall Wall Sleeve Baffle 7 5 16 Front Support Block FIG 15 Wall Trim 2 ea MOD E TIME R POW ER FAN SPEE D Fan Heat Energy Saver Cool Timer TEMP F F1 LOW F2 HIGH FIG 16 Air conditioners covered in this manual pose an excessive weight hazard Two or more people are needed to move and install the unit To prevent injury or strain use proper lifting and carrying t...

Page 12: ...anges 4 Remove the backing from the Horizontal Insulation strip 13 8 x 13 8 x 273 16 and attach that to the inside bottom of the sleeve as shown below Remove the backing from the Around Insulation strip 13 8 x 13 8 x 611 2 and attach that to the inside front of the sleeve as shown below 5 If the depth of your existing sleeve is less than or equal to 18 skip to step 7 Otherwise cut the baf fles and...

Page 13: ...ide trim over the front of the air conditioner until trim is flush with sleeve as shown below FIG 23 1 high 3 4 High Shim 2EA 6 6 FIG 24 Steel rear grille Plastic rear grille MOD E TIME R POW ER FAN SPEE D Fan Heat Energy Saver Cool Timer TEMP F F1 LOW F2 HIGH FIG 25 Wall Trim 2 ea MOD E TIME R POW ER FAN SPEE D Fan Heat Energy Saver Cool Timer TEMP F F1 LOW F2 HIGH FIG 26 Air conditioners covered...

Page 14: ...o set number of hours until shut off For your sleeping comfort once Time is set the Temperature setting will raise 2 F after 30 min and once again after another 30 min Push Timer button to advance setting from 1Hour 2Hours 12Hours maximum START TIME If unit is off use Timer to set number of hours before unit starts Push Timer button to advance setting from 1Hour 2Hours 12Hours maximum TEMPERATURE ...

Page 15: ...30 min and once again after another 30 min Push Timer button to advance setting from 1Hour 2Hours 12Hours maximum START TIME If unit is off use Timer to set of hours before unit starts Push Timer button to advance setting from 1Hour 2Hours 12Hours maximum MODE Push this button to shift mode of operation from COOL ENERGY SAVER FAN Heat COOL Fan runs continually for normal cooling operation ENERGY S...

Page 16: ...moke or stale air from the room This feature is best used in conjunction with the FAN ONLY position The direction of air can be controlled by adjusting the horizontal and ver tical louvers HORIZONTAL AIR DIRECTION CONTROL The horizontal air direction is adjusted by moving the vertical louver The lever for the vertical louver is located in the right and left side of the air discharge VERTICAL AIR D...

Page 17: ... section 1 2 Remove the screw which fasten the control box See Fig 29 3 Pull the control box from the barrier See Fig 29 4 Discharge the capacitor by placing a 20 000 ohm resistor across the capacitor terminals 5 Disconnect two wire housings in the control box 6 Pull the control box forward completely 7 Re install the components by referring to the removal procedure See Fig 29 Refer to the circuit...

Page 18: ...lamp which secures the turbo fan with plier See Fig 32 9 Remove the turbo fan with plier or your hand with out touching blades See Fig 33 10 Re install the components by referring to the removal procedure above 5 FAN 1 Remove the cabinet Refer to section 2 2 Remove the brace and shroud cover Refer to section 4 3 Remove the 6 screws which fasten the condenser 4 Move the condenser sideways carefully...

Page 19: ...tall one such as a WATCO A 1 before venting the FreonTM Leave the valve in place after servicing the system 3 Disconnect the 3 leads from the compressor 4 After purging the unit completely unbraze the suc tion and discharge tubes at the compressor con nections 5 Remove the 3 nuts and the 3 washers which fas ten the compressor See Fig 37 6 Remove the compressor 7 Re instill the components by referr...

Page 20: ...ly cord of this appliance is damaged it must be replaced by the special cord The special cord means the cord which has the same specification marked on the supply cord fit ted to the unit 11 THERMOSTAT 1 Remove the control box Refer to section 3 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 ...

Page 21: ... evaporator sideward carefully and then unbraze the interconnecting tube at the evaporator connectors 5 Remove the evaporator 6 Re install the components by referring to notes See Fig 42 14 CAPILLARY TUBE 1 Remove the cabinet Refer to section 2 2 After discharging the refrigerant completely unbraze the interconnecting tube at the capillary tube 3 Remove the capillary tube 4 Re install the componen...

Page 22: ...ge the line at the manifold connection 5 The system is now ready for final charging 6 Recharge as follows 1 Refrigeration cycle systems are charged from the High side If the total charge cannot be put in the High side the balance will be put in the suction line through the access valve which you installed as the system was opened 2 Connect the charging cylinder as shown in Fig 43B With valve C ope...

Page 23: ...apa ble of making a vapor proof seal Leak detector Tubing cutter Hand Tools to remove components Service valve A COMPOUND GAUGE EVAPORATOR LOW PRESSURE SIDE COMPRESSOR CAPILLARY TUBE CONDENSER HIGH PRESSURE SIDE SEE INSETS BELOW MANIFOLD GAUGE B FIG 43A Pulling Vacuum FIG 43B Charging A B EXTERNAL VACUUM PUMP A CHARGING CYLINDER LOW HI B C ...

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

Page 25: ...MPRESSOR OIL LIQUID REFRIGERANT CAPILLARY TUBE OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH SUCTION LIME COOL LOW PRESSURE VAPOR COOLED AIR COMPLETE LIQUID BOIL OFF POINT LIQUID PRESSURE DROP ROOM AIR HEAT LOAD VAPOR INLET HOT DISCHARGED AIR LIQUID OUTLET HIGH PRESSURE VAPOR LIQUID PEFRIGERANT LOW PRESSURE VAPOR ROOM AIR CONDITIONER EVAPORATOR COILS CONDENSER COILS CYCLE OF REFRIGERATION CONDE...

Page 26: ...fan operation Check gas leakage Repair gas leak Replacement of unit if the unit is beyond repair Satisfactory operation with temperature difference of inlet outlet air 44 6 50 F Check heat load increase Unexpected residue Overloaded Circuit Check of inside gas pressure Adjusting of refrigerant charge Malfunction of compressor Replacement of compressor Check of cold air circulation for smooth flow ...

Page 27: ...regular motor insulation Replacement of fan motor Regular but fails to start Replacement of compressor locking of rotor metal Improper thermostat setting Loose terminal connection Improper wiring Irregular motor resistance Irregular motor insulation Replacement of compressor Motor damaged Drop of power voltage Check capacitor Replacement Only compressor fails to start Defect of compressor capacito...

Page 28: ... s Check fan motor bearings if motor shaft will not rotate replace the motor Check voltage See limits on this page If not within limits call an electrician Test capacitor Check bearings Does the fan blade rotate freely If not replace fan motor Pay attention to any change from high speed to low speed If the speed does not change replace the motor Check grommets if worn or missing replace them If cr...

Page 29: ...if circuit is open Check the position of knob If not at the coldest setting advance the knob to this setting and restart unit Check continuity of the thermostat Replace thermostat if circuit is open Check the capacitor Replace if not within 10 of manufacturers rating Replace if shorted open or damaged Check the compressor for open circuit or ground If open or grounded replace the compres sor Check...

Page 30: ... causing the compressor to cycle Straighten the fins or replace the coil Test capacitor Check the terminals If loose repair or replace Check the system for a restriction If restricted clean of replace Close if open Determine if the unit is properly sized for the area to be cooled Check the set screw or clamp If loose or missing correct If the blower or fan is hitting air guide rearrange the air ha...

Page 31: ...210 1 250 5 2 4 7 6 2 5 8 9 4 9 4 9 200 11 200 2 900 3 500 14 0 15 3 26 7 DB 19 4 WB 35 DB 23 9 WB 21 1 DB 15 6 WB 8 3 DB 6 1 WB 465 16 40 OZ 470 16 6 OZ 3 ROW 12 STACKS 2 ROW 17 STACKS L BENDED TYPE TURBO FAN PROPELLER TYPE FAN WITH SLINGER RING 2 2 2 6 POLES 4 POLES TOUCH PANEL THERMISTOR VERTICAL LOUVER RIGHT LEFT HORIZONTAL LOUVER UP DOWN TOP DOWN 3 5KW 230V EXTERNAL OVERLOAD PROTECTOR INTERAN...

Page 32: ...130410 W48602 130900 435301 135312 147581 147582 2 147582 1 352390 148000 554160 550140 149980 359012 152302 135313 E D F C B 749180 249940 249951 267110 A 264110 268716 268714 238310 263230 W0CZZ 237200 MO DE TIM ER PO WER FAN SP EE D Fan Energ y Saver Co ol Tim er TE MP F F1 LOW F2 MED F3 HIGH 352115 35211A 352113 552113 552206 ...

Page 33: ... ASSEMBLY 5239A10002G R 349001 DAMPER VENTILATION 4900A20001A R E 135312 GRILLE ASSEMBLY FRONT SINGLE 3531A20055F R 135313 GRILLE INLET 3530A20020A R 147581 LOUVER HORIZONTAL 4758A20008B R 147582 1 LOUVER VERTICAL 4758A20009A R 147582 2 LOUVER VERTICAL 4758A20009B R 152302 FILTER MECH A C 5230A20007A R F 753010 HEATER ASSEMBLY ELECTRIC 5301A20011A R 753011 HEATER ELECTRIC 5300A20003A R 349480 ORIF...

Page 34: ...P No 3828A20040J Printed in Korea ...

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