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Packaged Terminal Air Conditioner

SVC MANUAL(Exploded View)

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.

Internal Use Only

http://biz.lgservice.com

Summary of Contents for LP120HED-Y8

Page 1: ...erminal Air Conditioner SVC MANUAL Exploded View CAUTION Before Servicing the unit read the safety precautions in General SVC manual Only for authorized service personnel Internal Use Only http biz lgservice com ...

Page 2: ... GRILLE 24 3 2 3 UNIT INSTALLATION 25 3 3 ELECTRICAL REQUIREMENTS 28 3 3 1 ELECTRICAL DATA FOR 230V 208 MODEL 28 3 3 2 ELECTRICAL SAFETY 28 4 FIELD INSTALLED ACCESSORIES 29 5 FERFORMANCE DATA 45 6 TROUBLESHOOTING GUIDE 6 1 OUTSIDE DIMENSIONS 50 6 2 PIPING SYSTEM 50 6 3 TROUBLESHOOTING GUIDE 51 7 SCHEMATIC DIAGRAM 56 8 EXPLODED VIEW 57 1 PREFACE This SERVICE MANUAL provides various service informat...

Page 3: ...0 11800 2 5 3 5 3 5 8530 11940 11940 590 610 750 770 1025 1055 3 0 2 8 3 8 3 5 5 2 4 8 3 68 3 66 3 44 3 43 3 29 3 28 12 5 12 5 11 7 11 7 11 2 11 2 1 208 60 1 230 60 1 208 60 1 230 60 1 208 60 1 230 60 94 6 94 7 94 9 95 7 94 8 95 6 9 5 335 9 5 335 11 390 0 9 1 2 1 5 45 43 45 43 49 47 60 58 60 58 63 61 R22 650 22 75 R22 790 27 9 R22 630 22 2 Rotary Non Tropical Rotary Non Tropical Rotary Non Tropica...

Page 4: ...ling Functions Range Heating Auto Operation Micom Control Panel Touch Type Timer Air Discharge Air Ventilation Deice Control Defrost Hot Start Look Cabinet Type Chassis Type Special Function Models LYH07EATA32 LYH09EATA22 LYC12EATA32 2 14 2 73 3 46 7300 9300 11800 1 82 2 35 6200 8000 2 0 3 7 3 7 6823 12623 12623 630 550 830 690 1 105 2 5 2 2 3 3 2 7 4 4 3 39 3 3 11 6 11 11 3 3 3 1 265 60 1 265 60 ...

Page 5: ...tes to have a time of equalizing the refrigerant pressures for optimizing cycling Fan Only Setting High Low The fan can run at HIGH or LOW speed without COOLING or HEATING to provide air circulation and ventilation Indoor Fan Speed Selections High Low The fan can run at HIGH or LOW speed for either COOLING or HEATING Two Fan motors The unit has two fan motors to provide quiet operation and maximum...

Page 6: ...es on control panel from 50 F to 90 F Temperature limits help to prevent overheating and overcooling and reduce energy costs Condensate Drain Valve The unit has a condensate drain valve to prevent water from collecting or freezing in the basepan Quick Heater Recovery The unit is designed to operate the electric heater to warm the room to the temperature set point as soon as heat pump cycle is on i...

Page 7: ...high speed fan operation LOW HEAT Heating with the low speed fan operation HIGH HEAT Heating with the high speed fan operation VENTILATION The ventilation lever is located to the lower left side of the unit The ventilation lever must be in the CLOSE position in order to maintain the best cooling conditions When fresh air is necessary in the room set the ventilation lever to the OPEN position The d...

Page 8: ...uns continually for normal heating operation TIMER SHUT OFF TIME You will usually use shut off time while you sleep If unit is running use Timer to set number of hours until shut off For your sleeping comfort once Time is set the Temperature setting will raise 2 F after 30 minutes and once again after another 30 minutes Push Timer to cycle through the settings from 1 Hour 2 Hours 12 Hours maximum ...

Page 9: ...2 OFF 3 OFF 4 OFF 5 LOCAL 1 OFF 2 OFF 3 OFF 4 OFF 5 ON ON REMOTE OFF ON ON ON Remote Local Energy Saver Temperature Limit 1 Temperature Limit 2 Temperature Limit 3 PTAC PTHP UNIT TYPE LOCAL LOCAL 1 OFF OFF 2 OFF OFF 3 OFF OFF 4 OFF OFF 5 LOCAL 1 OFF 2 OFF 3 OFF 4 OFF 5 LOCAL LOCAL 1 OFF OFF 2 OFF OFF 3 OFF OFF 4 OFF OFF 5 LOCAL 1 OFF 2 OFF 3 OFF 4 OFF 5 OFF 6 OFF 7 LOCAL LOCAL 1 OFF OFF 2 OFF OFF ...

Page 10: ...C 72 F 22 2 C Temperature Temperature Temperature Limit 1 Limit 2 Limit 3 Lowest Temp Highest Temp Lowest Temp Highest Temp Cooling Operation Heating Operation REMOVING THE FRONT GRILLE Additional controls are available after removing the front grille and option cover of control box To remove the front grille pull out the bottom of front grille and then lift up To replace the front grille place th...

Page 11: ...ch located at the Front Desk Control panel When the front desk switch is ON the fan operates according to the setting without working compressor and heater When the front desk switch is OFF the unit can operate according to the setting of controls REMOTE WALL THERMOSTAT When the wires are connected the unit will be controlled by a remote wall thermostat The thermostat connections supply the 24 Vol...

Page 12: ...struction in this manual for the Remote Wall Thermostat REMOTE LOCAL CONTROL When remote local switch 1 is on it allow the unit to operate by the control of Remote Wall Thermostat The unit control by knobs are not available ENERGY SAVER The energy saver switch 2 is on This switch is set at continuous fan to provide continuous fan operation in cool or heat modes When the switch is off the continuou...

Page 13: ...nto place This Room Air Conditioner PTAC discharges air from the top of the unit through reversible 2 position discharge grille louvers The unit is shipped from the factory with the discharge grille louvers at an angle of 40 off vertical In the alternate position the louvers will be at an angle of 15 off vertical To adjust air direction remove the front grille Remove the 4 screws that fasten the d...

Page 14: ...to section 2 1 1 2 Remove the two screws which fasten the control box See Figure 2 3 Pull the control box from the Air guide 4 Remove the control box cover See Figure 3 5 Disconnect wire housings on the 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 2 Figure 3 Figure 4 ...

Page 15: ...Refer to section 2 1 2 3 Remove the 4 screws which fasten the Evaporator See Figure 5 4 Remove the top cover assembly net steel brace See Figure 6 5 Remove the 6 screws which fasten the Air guide 6 Pull the Air guide assembly out from the unit See Figure 7 7 Remove the 2 screws which fasten the electric heater in the left hand side 8 Pull the electric heater towards left for a while and then lift ...

Page 16: ...ve the 4 screws which fasten the indoor motor and the earth wire See Figure 10 6 Remove the supports on both sides 7 Pull the cross flow fan out from the air guide 8 Re install the components by referring to the removal procedure 2 2 3 AXIAL FAN 1 Remove the brace 2 Remove the 4 screws which fasten the condenser with the shroud and the basepan See Figure 11 3 Remove the condenser sideways carefull...

Page 17: ...charge the refrigerant system using a refrigerant recovery system If there is no valve to attach the recovery system install one such as a WATCO A 1 before venting the refrigerant Leave the valve in place after servicing the system 2 Disconnect the 3 leads from the compressor 3 After purging the unit completely unbraze the suction and discharge tubes at the compressor connections 4 Remove the 3 nu...

Page 18: ...e supply cord of this appliance is damaged it must be replaced by an exact replacement part The special cord means the cord which has the same specification marked on the supply cord fitted to the unit 2 3 6 P C B 1 Remove the escutcheon 2 Remove the two knobs 3 Remove the 2 screws which fasten P C B cover 4 Disconnect all the leads which connected to the P C B 5 Remove the two screws which fasten...

Page 19: ...arge the refrigerant completely 3 Remove the control box assembly Refer to section 2 1 2 4 Remove the 4 screws which fasten the evaporator at the left side and the right side 5 Move the evaporator sideward carefully and then unbraze the interconnecting tube at the evaporator connectors 6 Remove the evaporator 7 Re install the components by referring to notes See Figure 20 2 4 3 CAPILLARY TUBE 1 Af...

Page 20: ...ylinder See Figure 16 B Open valve C Discharge 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 c...

Page 21: ...brazing equipment pinch off tool capable 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 Figure 16 A Pulling Vacuum Figure 16 B Charging A B EXTERNAL VACUUM PUMP A CHARGING CYLINDER LOW HI B C ...

Page 22: ...the wall sleeve 3 To improve unit energy efficiency it is recommended the change of outside grille for an unit protection and an addition of a plastic rear grille This is optional 4 Insulation strip prevents the exhaust air from re entering from either side of condenser space which may decrease the cooling efficiency of condenser 406 mm 16 1 066 mm 42 349 mm 13 3 4 505 mm 20 42 13 3 4 16 1 1 2 TYP...

Page 23: ...se may be installed flush with the finished indoor wall Mounting an outdoor grille or louver section to the building face may cause a space between the outdoor coil and the louver section Air splitters aligned with the ends of the outdoor coil must be installed between the outdoor coil inlet and outlet air streams Gaps between the outdoor coil and the louver section may allow condenser air recircu...

Page 24: ...f the minimum exterior dimensions are not met refer to page 23 The outside edge of the wall case should extend at least 1 4 beyond the outside wall This is necessary for proper caulking to prevent sealing thedrain holes in the rear flange of the wall case and to facilitate the installation of an accessory drain if used 2 The wall case should be secured to the wall at both sides Use a minimum of tw...

Page 25: ... 25 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 26: ...ASE OUTDOOR GRILLE CAULK CAULK 1 4 MIN POWER SUPPLY CONDUIT WALL RECEPTACLE BY OTHERS FINISHED FLOOR OR TOP OF CARPET Caulk around perimeter of wall case all four sides where it joins the building Interior and Exterior CAULK 1 4 CAULK LINTEL ROOM CABINET 2 MIN MOUNTING SCREWS BY INSTALLER WALL CASE OUTDOOR GRILLE SIDE CHANNEL 3 MIN 5 MAX 1 5 16 FINISHED FLOOR OR TOP OF CARPET SUB BASE RAK204 CAULK...

Page 27: ...ee Figure 17 2 Remove the front gille by pulling it out at the bottom to release it then lift it up along the unit top front See Figure 18 3 Slide the unit into the wall sleeve and secure with 6 screws through the unit flange holes See Figure 19 4 Reinstall the front grille by hooking the top over the unit top then pushing it in at the bottom See Figure 20 Figure 17 Figure 18 Figure 19 Figure 20 ...

Page 28: ...r supply requirements 3 3 1 ELECTRICAL DATA FOR 230 208V MODEL 3 3 2 ELECTRICAL SAFETY IMPORTANT GROUNDING INSTRUCTIONS The air conditioner has a three prong grounding plug on its power supply cord which must be plugged into properly grounded three prong wall receptacle for your protection against possible shock hazard FUSE Use a time delay fuse or circuit breaker Refer to the nameplate for proper...

Page 29: ...es Figure 22 3 Install the new door assembly with the key lock by bowing the door with both hands and aligning the door hinge pins with their bracket in the front Figure 23 Important Note Personal Risk Hazard Underwriter s Laboratories Inc listed For institutional use only where supervisory monitoring is available Any other use may increase the risk of personal injury or property damage Note The i...

Page 30: ...nd note it on the delivery receipt Unit must be stored in its original shipping carton in a dry secure place prior to its installation and use Installation The installation and servicing of the equipment referred to in this booklet should be performed by qualified experienced technicians WARNING Hazardous Voltage Disconnect all electric power including remote disconnects before servicing Follow pr...

Page 31: ... fig 27 Then install one of the three rubber elbows ref fig 31 at the inlet of the spraying tube and through the rubber grommet 10 Place the top cover assembly back into the unit 11 Install tube 1 and tube 2 ref fig 31 on the pump assembly using the rubber elbows as shown in fig 28 12 Position pump assembly to the basepan as shown in fig 29 and fasten the pump bracket to the basepan using the thre...

Page 32: ...f the control barrier as shown in fig 33 15 Assembly the unit back following the reverse order of disassembly NOTE All tube should be inserted into rubber elbows by at least 1 2 inch 32 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Figure 31 Pump assembly Tube 1 Tube 2 Rubber elbows 3 Spraying Tube Figure 32 BL BL Figure 34 Figure...

Page 33: ...om the sleeve These items may be removed from inside of the building Note The sleeve stiffener must be taken out before the rear sleeve enclosure panel can be removed from the sleeve 2 Prepare the stamped aluminum grille for installation on the sleeve by inserting the six 6 plastic grommets into the square holes located near the outer edges of all four sides of the grille With the grille positione...

Page 34: ...wer before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical power to this unit Receiving Upon receipt of the product inspect the shipping carton for signs of visible damage Report any damage or shortage to the carrier and note it on the delivery receipt The product must be stored in its original shipping carton in a dry secure ...

Page 35: ... A on the back of blank off plate C and secure the assembly to the left rear of wall sleeve with sheet metal screws provided See Figure 39 for finished left hand side installation If the unit chassis is to be installed right away install the condenser grille to wall sleeve with hardware provided See condenser grille installation instructions If the unit chassis will not be installed right away rep...

Page 36: ...ted to the drain system inside of the building Install the two blank off plates C and gaskets A on the outdoor portion of the wall sleeve as shown in Figure 40 These components may be installed after the sleeve is secured in the wall opening just prior to the installation of the condenser grille and chassis Leveling Legs Part No AYLL101 Description Leveling legs are designed to provide extra front...

Page 37: ...side to side Provide a slight slope one quarter bubble in the sight glass toward the outside Check the level again after the unit has been installed Adjust the legs as needed Installation on Wall Sleeve 1 Drill four 1 8 inch diameter holes in the wall sleeve two on each side using the leveling legs as a template Caulk around screws to prevent water leaks 2 Attach the legs to the wall sleeve using ...

Page 38: ...to ensure the power can not be inadvertently energized Failure to disconnect power before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical power to this unit CAUTION Use Copper Conductors Only Unit terminals are not designed to accept other types of conductors Failure to use copper conductors may result in equipment damage Impo...

Page 39: ...the red lead from the wire assembly 2 Connect the black lead to the center terminal of the fuse holder 3 Connect the white lead to the common C terminal on the capacitor 4 Connect the ground wire to the partition panel where the ground wire on the power cord was located Use the supplied green ground screw 5 Connect the white lead of the wire assembly at the junction box to the white lead of the fi...

Page 40: ...s not disconnect all electrical power to this unit CAUTION Use Copper Conductors Only Unit terminals are not designed to accept other types of conductors Failure to use copper conductors may result in equipment damage Important Note All wiring must comply with applicable local and national codes Type and location of fused disconnect switch es must comply with all applicable codes Failure to follow...

Page 41: ...older Kit Installation With Subbase See previous section for installation in the control panel 1 Remove both knockouts at the fuse holder location Figure 50 2 Install the fuse holders using screws provided The side connector tab on the fuse holders should be towards the left 3 Connect a stripped BK 9 wire to the center of the quick connect tab of the fuse holders Wire nut the other end of this wir...

Page 42: ...e performed by qualified experienced technicians WARNING Hazardous Voltage Disconnect all electric power including remote disconnects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvertently energized Failure to disconnect power before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical...

Page 43: ...ut tagout procedures to ensure the power can not be inadvertently energized Failure to disconnect power before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical power to this unit CAUTION Use Copper Conductors Only Unit terminals are not designed to accept other types of conductors Failure to use copper conductors may result in ...

Page 44: ...ring Access Subbase Box Assy Low Voltage Compartment 2 13 16 71 mm 11 13 16 300 mm A B F C E D D E Wall Sleeve Outdoor Side Wall Sleeve Inside Edge Back of Flange A 13 3 4 2 3 4 2 5 8 13 7 8 352 mm 3 1 16 78 mm Left End View Concentric Knockouts In Bottom Ground Screw Location Receptacle Provided Inside subbase Accessory Top View Concentric Knockouts In Rear Field Wiring Line Voltage Field Wiring ...

Page 45: ...315 350 390 310 350 Voltage V Cooling Data Cooling Capacity Btu h Cooling Amps A Cooling Power W EER Btuh Watt Moisture Removal Pts h Heat Pump Heating Data Heating Capacity Btu h Heating Amps A Heating Power W COP W W Airflow Indoor CFM W et 0 3ESP Hi Indoor CFM W et 0 3ESP Lo Indoor CFM Dry 0 3ESP Hi Indoor CFM Dry 0 3ESP Lo LP090HE 208 230 9 000 9 300 4 1 3 8 820 845 11 0 11 0 2 6 2 6 8 000 8 2...

Page 46: ...160 95 70 565 690 775 860 1005 1130 1045 1165 65 560 690 770 855 1000 1125 1040 1160 60 555 680 765 850 990 1120 1030 1150 55 540 670 765 835 980 1105 1020 1135 85 540 660 730 815 950 1070 965 1085 80 540 665 735 820 950 1075 980 1095 75 540 665 735 820 955 1080 990 1105 90 70 540 665 735 820 950 1075 990 1105 65 535 660 730 815 950 1070 990 1100 60 525 660 720 805 940 1060 980 1095 55 520 640 710...

Page 47: ...90 890 1075 1190 1410 1530 65 580 670 785 890 1070 1180 1400 1520 60 575 675 780 880 1060 1170 1390 1515 55 560 655 770 865 1050 1160 1370 1495 85 550 640 745 845 1020 1130 1305 1430 80 555 645 750 850 1025 1135 1325 1445 75 555 645 750 850 1025 1135 1335 1460 90 70 555 645 750 850 1025 1125 1340 1460 65 550 640 745 845 1020 1130 1335 1455 60 540 630 735 835 1010 1120 1320 1440 55 530 620 720 825 ...

Page 48: ...2 18 21 15 20 15 19 75 60 25 28 23 26 21 25 20 24 55 31 34 28 31 26 30 26 28 65 12 15 12 14 9 13 9 13 70 60 17 20 16 18 13 17 13 17 55 22 24 20 22 18 21 17 21 Model Room Air Room Air LP070HE LP090HE LP120HE LP150HE Dry Wet Temperature Across Temperature Across Temperature Across Temperature Across Bulb Bulb Indoor Coil T Indoor Coil T Indoor Coil T Indoor Coil T Min Max Min Max Min Max Min Max Rat...

Page 49: ...CFM 220 250 260 290 330 360 350 390 85 22 24 24 27 27 30 28 30 80 23 24 25 28 28 31 29 31 50 75 24 25 26 29 29 32 30 31 70 26 27 28 30 31 34 32 33 65 26 27 28 30 31 34 32 33 85 19 22 22 24 24 29 27 30 80 20 23 23 25 25 29 28 31 45 75 21 24 24 26 26 30 29 31 70 22 24 24 27 27 31 30 32 65 23 25 25 28 28 32 31 33 85 17 20 20 22 23 27 27 30 80 18 21 21 23 23 28 28 31 40 75 19 22 22 24 24 29 29 31 70 2...

Page 50: ...system Refer to Figure 61 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle MOTOR COMPRESSOR 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...

Page 51: ...g Check of outdoor coil heat exchanger the 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 7 10 C Check heat load increase Unexpected residue Overloaded Circuit Check of inside gas pressure Adjusting of refrigerant charge Malfunction of compressor Replacement of compres...

Page 52: ...capacitor Irregular motor resistance Irregular 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...

Page 53: ...om of the fan motor with mounting screw 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 grommet...

Page 54: ...tification Replace the switch 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...

Page 55: ...e closed over a large area on the coil surface head pressures will increase 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 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 missi...

Page 56: ...ronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 7 SCHEMATIC DIAGRAM MECHANICAL P NO 3850A20594J CN EXT CN TRANS CN ODF RY HEST1 RY OFD CN IDF CN COMP CN N CN L CN EXTN N CN IDAT CN IDPT ...

Page 57: ... 354210 349600B 346811 559011 549990 130411 554170 554030 148000 135515 135800 135500 550140 D 346810 152302A 359011 352390 149400 337000 349600A 435300 567480 263230 C 552114 35211A 552113 352116 352115 Internal OLP type compressrs 249951 A 1 237200 W0CZZB W0CZZA W6640 268711 135511 147910 264110 149410 238310 249941A 8 EXPLODED VIEW 8 1 MECHANICAL COOLING ...

Page 58: ...400 152302 135312 330870 354210 349600B 346811 559011 549990 130411 554170 554030 148000 135515 135800 135500 550140 249951 552206 D 346810 152302A 359011 352390 149400 337000 349600A 435300 567480 263230 C 1 552113 552116 552112 352116 352115 249951 A 1 237200 W0CZZB W0CZZA W6640 268711 135511 147910 264110 149410 238310 249941A Internal OLP type compressrs ...

Page 59: ...P NO 3828A20308L JULY 2008 ...

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