LG LP073CDUC Svc Manual

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LG Packaged Terminal

Air conditioner

SVC MANUAL(Exploded View)

MODEL : LP073CDUC LP093CDUC

LP123CDUC LP153CDUC

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual.

Only for authorized service personnel.

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Summary of Contents for LG LP073CDUC

Page 1 Internal Use Only http://biz.lgservice.com LG Packaged Terminal Air conditioner SVC MANUAL(Exploded View) MODEL : LP073CDUC LP093CDUC LP123CDUC LP153CDUC CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.
Page 2 Some of functions are slightly different depending upon models. The specification may be subject to change without prior notice for purpose of improvement. - 2 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 3 Some of functions are slightly different depending upon models. The specification may be subject to change without prior notice for purpose of improvement. - 3 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 4 This feature extends the overall life of compressor by preventing the short-cycling of the air-conditioner. When the compressor restarts, LG PTAC is designed to give a minimum of three minutes to have a time of equalizing the refrigerant pressures for optimizing cycling.
Page 5 The unit will activate the reverse cycle defrost when the outdoor coil temperature has remained at a cold temperature to form the ice on the coil.This ice will reduce airflow though the coil and will also reduce the efficiency of unit. The LG PTHP will employ an active reverse cycle defrost function to melt the ice off the outdoor coil for insuring room comfort conditions and savings from extended operation.
Page 6: Control Locations
HEAT after the cooling season is over. This odor, caused by fine dust particles on the heater, will disappear quickly. This is harmless. -6 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 7: Electronic Controls
→ → → • Push Timer to cycle through the settings from 1 Hour 2 Hours 12 Hours maximum. - 7 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 8 CH 44 Outdoor Air Thermistor Error (PTHP Only) CH 45 Outdoor Coil Thermistor Error (PTHP Only) CH 67 Outdoor Fan Error -8 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 9: Additional Controls
86° F (30.0° C) 54° F (12.2° C) Unit Type Cooling+Electric Heater+Heat Pump Cooling+Electric Heater Heat Pump Only Cooling Only - 9 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 10 64°F (17.7°C) 86°F (30.0°C) 54°F (12.2°C) 76°F (24.4°C) 66°F (18.9°C) 86°F (30.0°C) 54°F (12.2°C) 74°F (23.3°C) 68°F (20.0°C) 86°F (30.0°C) 54°F (12.2°C) 72°F (22.2°C) - 10 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 11: Remote/Local Control
24 Volt-N 24 Volt-L Compressor Heater Reversing Valve High Fan Low Fan GL GH O (Molex Housing Spec 396-07V) - 11 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 12 24 Volt-L Compressor Heater Reversing Valve High Fan Low Fan LO LI GL GH O (Molex Housing Spec 396-09V) - 12 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 13: Mechanical Parts
Flip the discharge grille 180°, then reattach the discharge grille to the front grille with 4 screws. - 13 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 14: Control Box
6. Pull the control box assembly out from the unit. (See Figure 4) 7. Re-install the components by referring to the removal procedure. Figure 4 - 14 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 15: Air Handling Parts
8. Pull the electric heater towards left for a while and then lift up vertically to disassemble it completely from Air guide. Figure 8 - 15 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 16: Cross Flow Fan
Figure 12) 5. Remove the axial fan. 6. Re-install the components by referring to the removal procedure. Figure 12 - 16 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 17: Electrical Parts
4. Disconnect all the leads of capacitor terminals. 5. Re-install the components by referring to the removal procedure, above. Figure 16 - 17 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 18: Power Cord
The wires should also be pressed a little downwards to prevent touching it to the display pcb. Figure 18 - 18 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 19: Refrigeration Cycle
2. Remove the capillary tube. 3. Re-install the components by referring to notes. - 19 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 20 Open valve C. Discharge the line at the manifold connection. 5) The system is now ready for final charging. - 20 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 22: Installation
Sleeve protection and an addition of a plastic rear grille. (This is optional.) Rear - 22 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 24: Preparation Of The Front Grille
Preparation of the Wall Case for All Types of temperature control. Construction As shipped, the LG wall sleeve is ready for installation. Care should be taken in location of electrical supply entry Do not remove the stiffener from inside the wall case or the...
Page 27: Unit Installation
7. Reinstall the front grille by hooking the top over the unit top, then pushing it in at the bottom. - 27 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 28: Electrical Requirements
National Electrical Code and local codes and ordinances. NOTE: DO NOT USE AN EXTENSION CORD on 208, 230, and 208/230 Volt units. - 28 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 29: Field-Installed Accessories
Figure 23 - New Door Installation Figure 21 - Remove Front Door Hinge Pins (Each Side) Brackets (Each Side) Front - 29 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 30 Important Note: The unit OFF switch does not disconnect all electrical power to this unit. - 30 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 31 10. Place the top cover assembly back into the unit. coming out of the inlet of the spraying tube. Figure 30 - 31 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 33 The unit OFF switch does not disconnect all electrical power corresonding holes in the architectural grille. to this unit. - 33 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 34: Condensate Drain Kit
See Figure 35 for components of the drain kit. - 34 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 36: Leveling Legs
Checklist The following is an abbreviated guide to leveling leg installation. Refer to appropriate areas for more detailed information. - 36 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 37 1. Two leveling legs are supplied in each kit. 2. One kit is required per unit. 3. Fout mounting screws are provided in each kit. - 37 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 38: Hard Wire Kit
12. Insert the wire tie into the 1/4" diameter hole located just above the incoming power opening. Tie all wires together securely with the wire tie. See Figure 46. - 38 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 39 8. Install the junction box cover plate. 9. Reinstall the control panel assembly. Back of Control Panel - 39 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 40: Fuse Holder Kit
Important Note: The unit OFF switch does not disconnect all electrical power Fuse Holder to this unit. Knockouts under panel - 40 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 41 Wire nut the other end to black subbase wire leading to Fuseholder RD-9 receptacle. (Figure 51) Green Field Connection Black Wiring - 41 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 42 Important Note: The unit OFF switch does not disconnect all electrical power to this unit. Figure 51—Standard Escutcheon - 42 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 43 Attach skirting with four sheet metal screws provided with kit. prior to its installation and use. (Figure 57, Location E) 7. Wire subbase for appropriate voltage (Figure 59). - 43 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 44 Figure 60 - NEMA Plug Configurations Voltage Unit Plug Subbase Receptacle 2-13/16" Cover (71 mm) Wiring Access Subbase Box Assy Low Voltage Compartment - 44 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 45: Troubleshooting Guide
LIQUID LIQUID OUTLET PRESSURE DROP (LIQUID REFRIGERANT) HIGH PRESSURE VAPOR LIQUID PEFRIGERANT CAPILLARY TUBE LOW PRESSURE VAPOR Figure 60 - 45 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 46 Satisfactory operation with temperature difference of Repair clogging in inlet & outlet air 44.6~50˚ F refrigeration circuit. (7~10˚ C) - 46 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 47 Regular but fails to start Irregular motor insulation ( ) Replacement of compressor (locking of rotor, metal) Replacement of compressor (Motor damaged) - 47 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 48 If knocking sounds continue when running or loose, replace the motor. If the motor hums or noise appears to be internal while running, replace motor. - 48 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 49: Room Air Conditioner Voltage Limits
ROOM AIR CONDITIONER VOLTAGE LIMITS NAME PLATE RATING MINIMUM MAXIMUM 208/230V 187V 253V - 49 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 50 If the blower or fan is hitting air guide, rearrange the air handling parts. Copper tubing Carefully rearrange tubing not to contact, compressor, shroud, and barrier. - 50 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 51: Piping Diagrams
(Condenser) (Evaporator) Axial Fan Compressor Gas side LOC. Description PCB Connector Indoor Air Thermistor CN-IDAT2 Indoor Coil Thermistor CN-IDPT - 51 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 52 28.3 A CN-AUX-S CN-IDPT CN-THERMO-S CN-ODT CN-IDAT2 CN-DISP1 CN-DISP2 CN-WRITE CN-PRESS CN-DIP CN-4WAY CN-ICR CN-MOTOR_IDF CN-EXT(L) CN-MOTOR_ODF CN-EXT(N) CN-N - 52 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 53 Note) * Please ensure GCSC since the replacement parts may be changed depending upon the buyer's request. Please check the correct parts in View RPL(Replacement Part List) on GCSC. (GCSC Website http://biz.Lgservice.com,) - 53 - Copyright ©2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 55 Service call Number # : 1-888-865-3026 Service call Number # : (888) LG Canada, (888) 542-2623 CANADA...

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Lp093cduc Lp123cduc Lp153cduc

LG LP073CDUC Svc Manual

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