Lenovo 9384 Personal Computer User Manual
Contents
1. 12 5 2 GUIDE je 2 3 1 OUTDOOR MOTOR 12 2 dios SYSTEM 26 2 3 2 INDOOR MOTOR 12 TROUBLESHOOTING CIDE a 2 3 3 COMPRESSOR 12 2 3 4 CAPACITOR si 12 6 SCHEMATIC DIAGRAM 32 2 3 5 POWER CORD 13 7 EXPLODED VIEW 33 2 36 B A o 13 2 4 REFRIGERATION CYCLE 4 9 REPLACEMENT PARTS LIST 34 1 PREFACE This SERVICE MANUAL provides various service information including the mechanical and electrical 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 2 INSULATION RESISTANCE TEST 1 When servicing the unit set the ROTARY SWITCH 1 Unplug the power cord and connect a jumper or POWER SWITCH to OFF O and unplug the between 2 pins black and white power cord 2 The grounding conductor green or green amp yellow 2 Observe the original lead dress is to be open If a short circuit is found replace all parts which 3 Measure the resistance value with an ohm meter have been overheated or damaged by the short between the jumpered lead and each exposed circuit metallic part on the equipment at all the positions 3 After servicing the2. Model Room Air Room Air LPO90HEM LP120HEM DY Wet Temperature Across Temperature Across Bu Bulb Indoor Coil A T Indoor Coil A T Min Max Min Max Rating Btu h 9300 9600 12300 12600 Rating CFM 240 270 310 340 85 2 6 1 5 80 11 15 10 13 90 75 19 22 18 22 70 29 30 26 30 80 7 11 5 10 75 15 18 14 18 85 70 23 25 21 25 65 31 33 30 33 75 11 15 10 13 70 18 20 16 20 80 65 24 27 23 26 60 32 33 30 33 70 13 16 11 15 65 18 21 16 20 75 60 23 26 21 25 55 29 31 26 30 65 12 15 10 13 70 60 16 18 14 17 55 20 22 18 21 24 Heating Change of Temperature Heat Pumps Model Room Air Room Air LPO90HEM LP120HEM D Wet Temperature Across Temperature Across Bu Bulb Indoor Coil A T Indoor Coil A T Min Max Min Max Rating Btu h 8200 8400 10900 11200 Rating CFM 260 290 330 360 85 24 27 27 30 80 25 28 28 31 50 75 26 29 29 32 70 28 30 31 34 65 28 30 31 34 85 22 24 24 29 80 23 2 25 29 45 75 24 26 26 30 70 24 27 27 31 65 25 28 28 32 85 20 22 23 27 80 21 23 23 28 40 75 22 24 24 29 70 23 24 25 29 65 24 25 26 30 85 17 20 21 24 80 18 21 22 25 35 75 19 22 23 26 70 20 23 23 27 65 21 24 24 28 Cooling Ampere Chart Air Conditioners Cond Inlet Air Model Temperature LP120CEM Amperage Min Max Rating Ampere 48 52 100 56 56 95 54 53 90 52 51 85 49 48 80 47 46 Cooling Ampere Chart Heat Pumps Cond Inlet Air Model Model Temperature LPO90HM LP
3. Condenser air flow restriction Remove the cabinet inspect the interior surface of the condenser if restricted clean carefully with a vacuum cleaner do not damage fins or brush Clean the interior base before reassembling Condenser fins If condenser fins are closed over a large area damaged on the coil surface head pressures will increase causing the compressor to cycle Straighten the fins or replace the coil Capacitor Test capacitor Wiring Check the terminals If loose repair or replace Refrigerating system Check the system for a restriction Insufficient cooling or heating Air filter If restricted clean of replace Exhaust damper door Close if open Unit undersized Determine if the unit is properly sized for the area to be cooled Excessive noise Cross flow fan Check the set screw or clamp If loose or missing correct 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 31 6 SCHEMATIC DIAGRAM POWER INPUT WH BL e BK BR HEATER ASSY Ribbed Plain FUSE BI METAL GN GN YL EATER LINK THERMQSTAT fao vvNA OO TB 2 ES WI WH h Se wi TB 3 FOR E HEATER MODEL RD BK L r L P BK p 4
4. website http www lgservice co A K ay un h E Bl ai 2 n 6 1 W Y a 2 y LG Room Air Conditioner LG NIT READ THE SAFETY ANUAL D SERVICE PERSONNEL CONTENTS 1 PREFACE 2 41 CONDENSER ti cit 14 1 1 SPECIFICATIONS sees 3 2 4 2 EVAPORATOR 44 14 1 2 FEATURES AND 4 2 4 3 CAPILLARY 14 1 3 CONTROL _ 6 3 INSTALLATION 1 4 ADDITIONAL CONTROLS 7 3 1 HOW TO INSTALL THE UNIT s 17 2 DISASSEMBLY INSTRUCTIONS 3 2 SUGGESTED TOOL REQUIREMENTS 18 2 1 MECHANICAL 9 3 2 1 PREPARATION OF SLEEVE 18 2 1 1 FRONT GRILLE sees 9 3 2 2 PREPARATION OF THE FRONT 2 1 2 CONTROL BOX Half Disassembly 10 GRIbEE x iut 18 2 1 3 CONTROL BOX Full Disassembly 10 3 2 3 UNIT INSTALLATION 19 2 2 AIR HANDLING 11 3 3 ELECTRICAL REQUIREMENTS 20 224 HEATER ASSEMBLY AND CROSS 3 3 1 ELECTRICAL DATA FOR 230V 208 MODEL 20 FLOW IRAN Acn ceat extat bos 11 3 3 2 ELECTRICAL 20 DARAN S m t m m 11 4 FERFORMANCE DATA 21 229 SHROUD a eee een eni 12 2 3 ELECTRICAL PARTS
5. Fasten this assembly to the each side of the wall sleeve as shown on the right Assemble the outdoor grille and fasten the 4 screws as shown on the right 3 2 2 PREPARATION OF THE FRONT GRILLE Carefully remove shipping tape if there is any from the front grille SO Shipping tape 18 3 2 3 UNIT INSTALLATION 1 Remove the shipping screw from the ventilation door See Fig 17 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 Fig 18 Figure 18 3 Slide the unit into the wall sleeve and secure with 6 screws through the unit flange holes See Fig 19 a I Ls m T Figure 19 4 Reinstall the front grille by hooking the top over the unit top then pushing it in at the bottom See Fig 20 Figure 20 19 3 3 ELECTRICAL REQUIREMENTS 3 3 1 ELECTRICAL DATA FOR 230 208V MODEL N CAUTION 1 Do not use an extension cord with this unit 2 When the unit is in the OFF position the power supply to the electrical controls 3 Disconnect the power to the unit before servicing the unit 4 Remove the power cord from the wall receptacle 5 Remove or turn off the protective device fuses or circuit breaker Wirings including installation of the receptacle must comply with the NEC and local codes local regulations FUSE Use a t
6. OUTDOOR OR BRJJOR BR Bw Y LOW HIGH FAN OFF FAN LOW LOW HEAT COOL HIGH HIGH HEAT COOL INDOOR PIPE THERMISTOR INDOOR AIR THERMISTOR RY COMP CN COMP CN EXT2 CN TRANS 1 1 I 0000 11 11 11 11111 pono poca I leoi REMOTE EXTERNAL THERMOSTAT TRANS s p 1 P NO 3854A20196A LOCATION Q TY NO DESCRIPTION PER SET REMARKS 1 POWER CORD 1 INDOOR 1 2 MOTOR OUTDOOR 1 BOX TYPE 1 3 CAPACITOR CAN TYPE 1 4 THERMOSTAT 1 COMPRESSOR 1 6 OVERLOAD PROTECTOR 1 932 7 EXPLODED VIEW 32 8 REPLACEMENT PARTS LIST PART NO ES DESCRIPTION REMARK LPO90HEM LP120CEM LP120HEM 249951 CONTROL BOX ASM INDOOR 4995A20466U 4995A20463W 4995A20463U 264110 POWER CORD ASM 6411A20048M 268714 PCB ASM MAIN 6871A10082J 6871A10082C 149410 KNOB ASM 4941A30015B 237200 PANEL ASM CONTROL 3720A20169A 237204 PANEL SIDE 3720A20186A 238310 ESCUTCHEON 3831A30008A 263230 THERMISTOR
7. CFM Dry 0 3ESP Hi 320 350 Indoor CFM Dry 0 3ESP Lo 280 310 Heat Pump Performance Data LPO90HEM Voltage V 208 230 208 230 208 230 Cooling Data Cooling Capacity Btu h 11 800 12 100 9 000 9 300 Cooling Amps A 54 5 0 3 9 3 7 Cooling Power W 1 065 1 090 775 800 EER Btuh Watt 11 1 11 1 11 6 11 6 Moisture Removal Pts h 3 3 3 3 3 4 3 4 Heat Pump Heating Data Heating Capacity Btu h 10 700 10 900 8 000 8 200 Heating Amps A 48 44 3 5 3 2 Heating Power W 950 970 690 705 COP W W 33 3 3 3 4 34 Airflow Indoor CFM Wet 0 3ESP Hi 240 270 310 340 Indoor CFM Wet 0 3ESP Lo 190 230 270 300 Indoor CFM Dry 0 3ESP Hi 260 290 330 360 Indoor CFM Dry 0 3ESP Lo 220 250 290 330 21 Cooling Wattage Air Conditioners Model LP120CEM Temperature Outdoor Air Return Air Total Wattage Dry Bulb Wet Bulb Input Min Max Rating Wattage 1045 1090 85 1050 1180 80 1055 1180 75 1060 1180 100 70 1055 1180 65 1050 1180 60 1045 1175 55 1030 1160 85 1000 1125 80 1005 1130 75 1005 1135 95 70 1005 1130 65 1000 1125 60 990 1120 55 980 1105 85 950 1070 80 950 1075 75 955 1080 90 70 950 1075 65 950 1070 60 940 1060 55 930 1055 85 895 1020 80 900 1020 75 905 1030 85 70 900 1020 65 895 1020 60 890 1010 55 880 1000 85 850 970 80 850 970 75 850 975 80 70 850 970 65 850 970 60 940 960 55 830 950 22
8. Cooling Wattage Heat Pumps Model LPO90HM LP120HEM Temperature Outdoor Air Return Air Total Wattage Total Wattage Dry Bulb Wet Bulb Input Input Min Max Min Max Rating Wattage 810 850 1120 1145 85 830 935 1120 1230 80 835 940 1125 1235 75 835 940 1130 1240 100 70 835 940 1125 1240 65 830 935 1120 1230 60 820 925 1115 1230 55 810 915 1100 1210 85 785 890 1070 1180 80 790 890 1075 1190 45 795 890 1075 1190 95 70 790 890 1075 1190 65 785 890 1070 1180 60 780 880 1060 1170 55 770 865 1050 1160 85 745 845 1020 1130 80 750 850 1025 1135 75 750 850 1025 1135 90 70 750 850 1025 1125 65 745 845 1020 1130 60 735 835 1010 1120 55 720 825 1000 1110 85 700 800 970 1080 80 705 800 975 1085 75 705 810 975 1085 85 70 705 800 975 1085 65 700 800 970 1080 60 690 790 960 1070 55 680 775 950 1060 85 655 755 920 1030 80 660 760 925 1030 75 660 760 925 1035 80 70 660 760 920 1030 65 655 755 920 1030 60 650 745 910 1020 55 635 735 900 1010 23 Cooling change of temperature Air Conditioners Room Air Room Air LP120CEM Dr Wet Temperature Across Bul Bulb Indoor Coil A T Min Max Rating Btu h 11700 12000 Rating CFM 300 330 85 1 5 80 9 13 90 75 18 22 70 26 30 80 5 10 75 13 18 85 70 21 25 65 29 33 75 9 13 70 15 20 80 65 23 26 60 29 33 70 10 15 65 15 20 15 60 21 25 55 26 30 65 9 13 70 60 13 17 55 18 21 Cooling Change of Temperature Heat Pumps
9. Defect of compressor capacitor Check capacitor Replacement Improper thermostat setting gt Loose terminal connection Improper wiring Y Only fan fails to start Y Improper wiring Y Defect of fan motor capacitor Irregular motor resistance Q Irregular motor insulation Q Y Replacement of fan motor Irregular motor resistance Q Y Irregular motor insulation 0 Replacement of compressor Motor damaged 28 Regular but fails to start Replacement of compressor locking of rotor metal COMPLAINT CAUSE REMEDY Fan motor will not run No power Check voltage at outlet Correct if none Power supply cord Check voltage to rotary switch If none check power supply cord Replace cord if circuit is open Rotary switch Check switch continuity Refer to wiring diagram for terminal identification Replace switch if defective Wire disconnected or connection loose Connect wire Refer to wiring diagram for terminal identification Repair or replace loose terminal Capacitor Discharge capacitor before testing Test capacitor Replace if not within 10 of manufacturer s rating Replace if shorted open or damaged Will not ro
10. Highly featured Micom controls using IIR infinite impulse response IIR function can make Micom controls maximize and keep the comfort conditions to sense the small changes in temperature per second Compressor Restart delay 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 Fan Only Setting High Low The unit provides the function of selecting the either High or Low speed for Fan Only operation Indoor Fan Speed Selections High Low The unit is operated in High Heat or Low Heat or High Cool or Low Cool Two Fan motors The unit has two fan motors to provide the occupants with the quiet environment to enjoy the peaceful life and maximum operating efficiency LED Diagnostics All units have this feature indicating the problem when the unit is not operating properly with easy to read diagnostics For example 1 blink every 2 seconds indicates the compressor failure Indoor Filters The unit uses the two indoor filters easily slide in and out The filters may be cleaned by washing and brushing without removing the front grille Rotary Compressor The unit uses the rotary compressor for the quiet reliable operation and prolong life 2 Position Discharge Grille The discharge grille can provide
11. P C B cover Disconnect all the leads which connected to the P C B Remove the two screws which fasten the P C B board Re install the components by referring to the removal procedure above 13 Figure 12 Figure 13 2 4 REFRIGERATION CYCLE CD 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 venting the Freon Leave the valve in place after servicing the system TAE SZ AC 1 2 4 1 CONDENSER 1 Remove the brace and the shroud Refer to section 2 2 2 2 Remove the 4 screws which fasten the shroud Figure 14 Refer to section 2 2 2 3 Push forward the shroud and remove the 2 screws which fasten the condenser with the basepan 4 After discharging the refrigerant completely unbraze the interconnecting tube at the condenser connections 5 Remove the condenser 6 Re install the components by referring to notes See Fig 14 2 4 2 EVAPORATOR 1 Remove the front grille Refer to section 2 1 1 2 Discharge 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
12. changeover or programmable A remote thermostat can also be added to any installed unit Zone Sensor Occupants enjoy ultimate comfort with consistent climate control Attach an optional inexpensive remote Zone Sensor to exactly match the functions of the PTAC without disabling any features 1 3 CONTROL LOCATIONS OPERATION LOW HEAT COOL A HIGH COOL HIGH HEAT g COOLER ELECTRIC HEATING MODEL TEMPERATURE CONTROL Set the Thermostat control to the desired temperature mark 5 the mid point is a good starting position If the room temperature is not satisfactory after a reasonable time adjust the control to a cooler or warmer setting as appropriate VENTILATION 4 WARMER OPERATION 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 damper is opened and outdoor air is drawn into the room This will reduce the cooling or heating efficiency When the air conditioner has performed a cooling or heating operation and is turned off or set to the fan position wait at least 3 minutes before resetting to the cooling operation A slight heat odor may come from the unit when first switching to HEAT after the cooling season is over This odor caused by fine dust particles on the he
13. components by referring to notes See Fig 15 Figure 15 2 4 3 CAPILLARY TUBE 1 After discharging the refrigerant completely unbraze the interconnecting tube at the capillary tube 2 Remove the capillary tube 3 Re install the components by referring to notes 14 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 Leave the valve in place after servicing the system 2 After discharging the unit completely remove the desired component and unbraze the pinch off tubes 3 Solder service valves into the pinch off tube ports leaving the valves open 4 Solder the pinch off tubes with Service valves 5 Evacuate as follows 1 Connect the vacuum pump as illustrated Fig 16A 2 Start the vacuum pump slowly open manifold valves A and B with two full turns counterclockwise and leave the valves closed The vacuum pump is now pulling through valves A and B up to valve C by means of the manifold and entire system If high vacuum equipment is used just crack valves A and B for a few minutes then open slowly with the two full turns counterclockwise This will keep oil from foaming and being drawn into the vacuum pump 3 Operate the vacuum pump f
14. is controlled by dip switch 1 3 This temperature limiting is not available with the Remote Wall Thermostat Temperature Temperature Temperature Cooling Operation Heating Operation Limit 1 Limit 2 Limit 3 Lowest Temp Highest Temp Lowest Temp Highest Temp OFF OFF OFF 54 F 12 2 C 86 F 30 0 C 54 F 12 2 C 86 F 30 0 C ON OFF OFF 56 F 13 3 C 86 F 30 0 C 54 F 12 2 C 84 F 28 9 C OFF ON OFF 58 F 14 4 C 86 F 30 0 C 54 F 12 2 C 82 F 27 8 C ON ON OFF 60 F 15 5 C 86 F 30 0 C 54 F 12 2 C 80 F 26 7 C OFF OFF ON 62 F 16 6 C 86 F 30 0 C 54 F 12 2 C 78 F 25 590 ON OFF ON 64 F 17 7 C 86 F 30 0 C 54 F 12 2 C 76 F 24 4 C OFF ON ON 66 F 18 9 C 86 F 30 0 C 54 F 12 2 C 74 F 23 3 C ON ON ON 68 F 20 0 C 86 F 30 0 C 54 F 12 2 C 72 F 22 2 C 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 continuous fan allows continuous circulation of room air and make the more balanced temperature of the room When the switch is on the fan is on or off with the compressor or with the heater FRONT DESK CONTR
15. is ineffective Ineffective Cooling Check of cold air circulation for smooth flow Dirty indoor coil Heat exchanger Malfunction of fan Clogged of air filter Obstruction at air outlet I Correct above trouble Check clogging in refrigeration circuit Repair clogging in refrigeration circuit Y Check of outdoor coil heat exchanger amp the fan Check heat load increase operation Check gas leakage Unexpected residue Repair gas leak Overloaded Circuit Replacement of unit if the unit is beyond repair Check of inside gas Y pressure Adjusting of refrigerant charge Malfunction of compressor Replacement of compressor Satisfactory operation with temperature difference of inlet amp outlet air 44 6 50 F 27 Fails to Start Y Check of power source Check of control switch setting Check of circuit breaker and fuse Gas leakage of feeler bulb of thermostat Check of control switch Only compressor fails to start Drop of power voltage
16. 0 BRACE 4800A20002A 354210 EVAPORATOR ASM 5421A20118A 5421A20118C 5421A20118A 554030 CONDENSER ASM 5403A20091D 5403A20076B 5403A20091D 34 May 2006 P No 3828A20308H Printed in Korea
17. 1 Remove the front grille Refer to section 2 1 1 2 Remove the three screw which fasten the control box See Fig 2 3 Pull the control box from the barrier See Fig 2 4 Discharge the capacitor by placing a 20 000 ohm resistor across the capacitor terminals Disconnect three wire housings in the control box Pull the control box forward completely 7 Re install the components by referring to the removal procedure See Fig 2 Refer to the circuit diagram found on page 25 in this manual and on the control box Figure 2 2 1 3 CONTROL BOX Full Disassembly 1 Remove the front grille Refer to section 2 1 1 2 Remove the 4 screws which fasten the control box cover See Fig 3 3 Disconnect three wire housings in the control box 4 Remove three screws which fasten the control box assembly 5 Pull the control box assembly out from the unit wasa W AX 5 x NS a mE Figure 3 10 2 2 AIR HANDLING PARTS 2 2 1 HEATER ASSEMBLY AND CROSS FLOW FAN 1 Remove the front grille Refer to section 2 1 1 2 Remove the control box assembly Refer to section 2 1 3 3 Remove the 3 screws which fasten the net steel See Fig 4 4 Remove the 3 screws which fasten the electric heater assembly Electric heater model only See Fig 4 5 Loosen the hexagon screw with the Hex wrench See Fig 5 6 Remove the 4 screws which fasten the indoor mo
18. 120HEM Amperage Amperage Min Max Min Max Rating Ampere 36 39 48 52 100 34 40 56 55 95 32 38 53 52 90 31 36 50 50 85 31 34 48 47 80 29 3 3 46 45 25 5 TROUBLESHOOTING GUIDE 5 1 OUTSIDE DIMENSIONS 1 066mm 42 505mm 20 406mm 16 5 2 PIPING SYSTEM Following is a brief description of the important components and their functions in the refrigeration system Refer to Fig 21 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle ROOM AIR CONDITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS CONDENSER COILS SUCTION LIME VAPOR INLET COMPLETE LIQUID HOT BOIL OFF POINT COSLLOWFBESSUREVAPOR DISCHARGED COOLED AIR AIR ROOM AIR HEAT LOAD OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH e OMPRESSOR LIQUID PRESSURE LIQUID OUTLET DROP LIQUID REFRIGERANT I PRESSURE VAPOR CAPILLARY TUBE p EN PEFRIGERANT LOW PRESSURE VAPOR Figure 21 26 5 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
19. ASM 6323A20003K 263230 THERMISTOR ASM 6323A20006A WOCZZ CAPACITOR DRAWING INDOOR 3H00660C WOCZZ CAPACITOR DRAWING OUTDOOR 6120AR2194A 6120AR2194D 6120AR2194B W6640 TERMINAL BLOCK 3H00390A 261704 TRANSFORMER POWER 6170A20012A 249940 CONTROL BOS ASM SINGLE 4994A20052A 147900 BARRIER SINGLE 4790A20033A 135510 COVER ASM CONTROL 3551A20062G 554160 COMPRESSOR SET 2520UKYK2BA 2520UKLK2BA 2520UKHK2AA 550140 ISOLATOR COMP 4H00982E 567502 OLP 6750U L014A 6750U LO61A 6750U L039A 35211A TUBE ASM SUCTION I 5211A21365A B 552114 TUBE ASM DISCHARGE 5211A20531A 552111 TUBE ASM CAPILLARY 5211A20623D 552113 TUBE ASM CONDENSER OUT 5211A30434A 552102 TUBE CAPILLARY BEND d 5210A22614D D 147911 BARRIER ASM INDOOR 4791A10005D 4791A10005A 346810 MOTOR ASM INDOOR 4681A20064E 4681A20064A 349600 MOUNT MOTOR 4960A20026A 4960A20032A 359011 FAN ASM CROSS FLOW 5901A10027A 349011 DAMPER ASM 4901A30002A 152302 FILTER MECH A C 5230A20016A 135312 GRILLE ASM FRONT 3531A10149D 152302 FILTER MECH A C 5230A20021A 135515 COVER ASM TOP 3551A20197P 753000 HEATER ELECTRIC 5300A20006A W50400 RUBBER 5040A30032A 546811 MOTOR ASM OUTDOOR 4681A20063E 4681 A20063A 130411 BASE ASM WELD 3041A20028B 135500 DRAIN COVER 3550A20102A 552206 DRAIN VALVE 5220A30006A 349600 MOUNT MOTOR 4960A20005A 149980 SHROUD 4998A20001B 559010 FAN ASM AXIAL 5900AR1173A W48602 CLAMP SPRING 3H02932B 14800
20. OL When the pair wire is connected to the connector LOand LI the unit can be turned ON or OFF with a switch located at the Front Desk Control panel When the front desk switch is ON the fan operate according to the condition of setting without working compressor and heater When the front desk switch is OFF the unit can operate according to the setting of controls Wire AWG Maximum Length Note The following figures show wiring 22 600ft 180m schematics for heat pump and straight cool 20 900ft 270m units with electric heat respectively 18 1500ft 450m 16 2000ft 610m Wiring Schematic for Remote Heat Pump Oo D 000 Q LO ii GLGH O W Y R C XW 2 W Front Desk Switch CP CI SU ES GH w REMOTE WALL THERMOSTAT CONTROL BOARD e When the wires are connected the unit will be controlled by a remote wall thermostat CONNECTIONS The thermostat connections supply the 24 Volt AC When you install the Wirinq Schematic for digital electronic thermostat you must set it to the 24 Volt AC See the Silo Cool Unit installation Instruction in this manual for the Remote Wall Thermostat LO LI GL GH OW Y R C CONTROL BOARD CONNECTIONS 9 24 Vol
21. air flows upward at an angle of 40 off vertical or 80 15 degree off vertical An angle is changed by removing the front grille and 4screws that fasten the discharge grille to the front grille to rotate an alternate position of the louvers Indoor Room Freeze Protection When the unit senses the room temperature falls to 40 F below the unit activates the fan motor and either the electric resistance heater or the hydronic heater to prevent pipes or fixtures from freezing This also overrides front desk control of the unit mounted or wall mounted controls e Door Switch Occupancy Sensor The unit is capable of accommodating a field installed door switch and occupancy sensor to operate the energy management feature For additional information refer to the Unit Operation section Compressor Overload Protection This feature prevents the damage of the compressor by sensing the indoor tube temperature in heating If the indoor temperature is over 130 F the outdoor fan will be switched off and on below 120 F Outdoor Air Temperature Switchover The unit is designed to control the electric heater interfacing with the outdoor temperature When the outdoor temperature falls to 20 F below it makes the compressor be off and the electric heater be turned on until the outdoor temperature is above 25 F This will effectively change the Unit from heat pump mode to total electric resistance heat Temperature limits The unit is programmed to provide both h
22. ater will disappear quickly This is harmless M g COOLER COOLING ONLY MODEL OPERATION MODE SELECTOR OFF Turns air conditioner off LOW FAN Low speed fan operation without cooling HIGH FAN High speed fan operation without cooling LOW COOL Cooling with the low speed fan operation HIGH COOL Cooling with the high speed fan operation LOW HEAT Heating with the low speed fan operation HIGH HEAT Heating with the high speed fan operation 1 4 ADDITIONAL CONTROLS 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 the tabs over the top of the unit and push the bottom of front grille until the clips snap into place ADDITIONAL CONTROLS The additional controls are located behind the option cover of control box The standard settings will be in the OFF position The authorized service man has to check switches and ensure the switches are in the desired position REMOTE ON ON ON ON OFF LOCAL OFF OFF OFF OFF Remote Local af A 1 Energy Saver Temperature Limit 1 Temperature Limit 2 Temperature Limit 3 TEMPERATURE LIMITING Temperature Limiting can save money by limiting the lowest temperature for cooling and the highest temperature for heating The temperature limiting
23. eating and cooling temperature limits by dip switches on control panel from 50 F to 90 F Temperature limits help to prevent overheating and overcooling for reducing the energy costs Condensate Drain Valve The unit has the condensate drain valve that prevents water from freezing in 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 in heating This feature has an advantage of reducing the time to reach the set point and improving the temperature increase for better comfort Reverse Cycle Defrosting PTHDs only 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 High Temperature Heat Pump Operation Protection The compressor will be switched off to prevent damage when the heat pump is operated in high outdoor temperatures Remote Thermostat Control Each unit is built to be operated from any standard 4 or 5 wire remote mounted thermostat if desired The unit has a built in low voltage power source which can accommodate a large variety of thermostat choices manual auto
24. ely attaches to the sleeve or the flange of the sleeve to secure the L new air conditioner Dimension of sleeve assembly optional 12 To avoid vibration and noise make sure the unit is installed securely and firmly A BEFORE ATTACHING THE FRONT GRILLE TO THE SLEEVE IF YOU WANT TO PULL OUT THE FILTER UPWARD INSULATION pe 1 There should be no obstacle like a fence within 20 which cca HEAT might restrict heat radiation from the condenser RADIATION INTAKE gt AIR B IF YOU WANT TO PULL OUT THE FILTER LS s DOWNWARD Over 20 The grille is already designed for that way 1 Install the unit a little obliquely outward not to leak the condensed water into the room about 1 2 or 1 4 bubble with level 2 Install the unit with its bottom portion 30 60 above the floor level 3 The power cord must be connected to an independent circuit The green wire must be grounded f 7 3 2 SUGGESTED TOOL REQUIREMENTS SCREWDRIVER RULER KNIFE HAMMER PENCIL LEVEL 3 2 1 PREPARATION OF SLEEVE a 55 0D SLEEVE HARDWARE NUMBER NAME OF PARTS QTY D 3 o SLEEVE LOWER 1 SLEEVE UPPER 1 SCREW 4 OUTDOOR GRILLE 1 DRAIN KIT 1 ASSEMBLE THE WALL SLEEVE Raise the sleeve side panels to upright position as shown on the right Place sleeve upper on top of side panels Fasten the four screws as shown on the right Assemble drain kit
25. ely unbraze the suction and discharge tubes at the compressor connections 4 Remove the 3 nuts and the 3 washers which fasten the compressor See Fig 10 5 Remove the compressor 6 Re instill the components by referring to the removal procedure above 2 3 4 CAPACITOR 1 Remove the control box Refer to section 2 1 2 2 Remove 1 screw and disconnect the leads which connected to the box type capacitor See Fig 11 3 Remove 1 screw and the clamp which fastens the can type capacitor See Fig 11 4 Disconnect all the leads of capacitor terminals 5 Re install the components by referring to the removal procedure above 12 Figure 8 Figure 10 Figure 11 2 3 5 POWER CORD 1 2 3 Remove a screw which fastens the clip cord Separate the power cord from the control box Remove the control box Refer to section 2 1 2 Disconnect the grounding screw from the control box Disconnect 2 receptacles See Fig 12 Re install the component by referring to the removal procedure above Use only one ground marked hole for ground connection If the supply 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 fitted to the unit 2 3 6 P C B 1 2 3 4 Remove the escutcheon Remove the two knobs Remove the 2 screws which fasten
26. ime delay fuse or circuit breaker Refer to the nameplate for proper power supply requirements 3 3 2 ELECTRICAL SAFETY IMPORTANT GROUNDING INSTRUCTIONS Tandem 15A Perpendicular 20A Large Tandem 30A 230 208 volt receptacle configuration 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 power supply requirements 208 230 and 208 230 VOLT UNITS These units are equipped with a three prong grounding plug on the power supply cord which must be plugged into a matching properly grounded three prong wall receptacle for your protection against possible shock hazard If such an outlet is not present one must be installed by a qualified electrician in accordance with the National Electrical Code and local codes and ordinances NOTE DO NOT USE AN EXTENSION CORD on 208 230 and 208 230 Volt units 20 4 PERFORMANCE DATA Air Conditioner Performance Data LP120CEM Voltage V 208 230 208 230 Cooling Data Cooling Capacity Btu h 11 500 11 800 Cooling Amps A 48 5 2 Cooling Power W 1025 1055 EER Btuh Watt 11 0 11 0 Moisture Removal Pts h 3 3 3 3 Airflow Indoor CFM Wet 0 3ESP Hi 300 330 Indoor CFM Wet 0 3ESP Lo 290 290 Indoor
27. n to the pinch off tube Using a tube cutter cut the pinch off tube about 2 inches from the pinch off tool Use sil fos solder and solder pinch off tube closed Turn off the unit allow it to set for a while and then test the leakage of the pinch off connection 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 CONDENSER COMPOUND HIGH PRESSURE SIDE Q O MANIFOLD GAUGE B CAPILLARY TUBE SEE INSETS BELOW EVAPORATOR LOW PRESSURE SIDE COMPRESSOR EXTERNAL VACUUM PUMP SR CHARGING 3 S CYLINDER Figure 16A Pulling Vacuum Figure 16B Charging 16 3 INSTALLATION Dimension of air conditioner 3 1 HOW TO INSTALL THE UNIT XX There are sharp edges that can cause serious cuts When lifting the air conditioner it is HEAVY Use 2 peoples to lift 1 066mm 42 For existing sleeve you should measure the wall sleeve dimensions You can install the new air conditioner according to these installation instructions to achieve the best performence All wall sleeves used to mount the new air conditioner must be in good structural condition and have the rear grille that secur
28. o wiring diagram for identification and replace Check wire locations If not per wiring diagram correct Rotary Check for continuity refer to the wiring diagram for terminal identification Replace the switch if circuit is open Thermostat 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 Capacitor Discharge capacitor before Check the capacitor Replace if not within 10 of manufacturers servicing rating Replace if shorted open or damaged C Check the compressor for open circuit or ompressor ground If open or grounded replace the compressor heck th i Overload Check the compressor overload if externally mounted Replace if open If the compressor temperature is high remove the overload cool it and retest ROOM AIR CONDITIONER VOLTAGE LIMITS NAME PLATE RATING MINIMUM MAXIMUM 208 230V 187V 253V 30 COMPLAINT CAUSE REMEDY Compressor cycles on overload Voltage Check the voltage See the limits on the preced ing page If not within limits call an electrician Overload Check overload if externally mounted Replace if open If the compressor temperature is high remove the overload cool and retest Fan motor If not running determine the cause Replace if required
29. or 20 to 30 minutes until 600 microns of vacuum is obtained Close valves A and B and observe vacuum gauge for a few minutes A rise in pressure would indicate a possible leak or moisture remaining in the system With valves A and B closed stop the vacuum pump 4 Remove the hose from the vacuum pump and place it on the charging cylinder See Fig 16B Open valve C Discharge the line at the manifold connection 5 The system is now ready for final charging 15 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 16B With valve C open discharge the hose at the manifold connection 3 Open valve A and allow the proper charge to enter the system Valve B is still closed 4 If more charge is required the high side will not take it Close valve A 5 With the unit running open valve B and add the balance of the charge a Do not add the liquid refrigerant to the Low side b Watch the Low side gauge allow pressure to rise to 30 165 c Turn off valve B and allow pressure to drop d Repeat steps B and C until the balance of the charge is in the system 6 When satisfied the unit is operating correctly use the pinch off tool with the unit still running and clamp o
30. t N B 24 Volt L Y Compressor Heater w Reversing Valve High Fan Low Fan wi GH THERMOSTAT CONNECTIONS 2 DISASSEMBLY INSTRUCTIONS Before the following disassembly POWER SWITCH is set to OFF and disconnected the power cord 2 1 MECHANICAL PARTS 2 1 1 FRONT GRILLE 1 Remove the front grille See Fig 1 2 To remove the front grille pull out the bottom of the front grille and then lift up Re install the component by referring to the removal procedure 3 To replace the front grille place the tabs over the top of the unit and push the bottom of front grille until the clips snap into place Figure 1 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 an 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 discharge grille to the front grille Screw EEEEEEEH DUREE Flip the discharge grille 180 then reattach the discharge grille to the front grille with 4 screws 2 1 2 CONTROL BOX Half Disassembly
31. tate Fan blade hitting shroud or cross flow fan hitting scroll Realign assembly Units using slinger ring condenser fans must have 7 4 to 5 16 inch clearance to the base If it is hitting the base shim up the bottom of the fan motor with mounting screw s Check fan motor bearings if motor shaft will not rotate replace the motor Fan motor runs intermittently Revolves on overload 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 Fan motor noise Grommets Check grommets if worn or missing replace them Fan If cracked out of balance or partially missing replace it Turbo fan If cracked out of balance or partially missing replace it Loose set screw Tighten it Worn bearings 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 29 COMPLAINT CAUSE REMEDY Compressor will not run but fan motor runs Voltage Check voltage See the limits on the preceding page If not within limits call an electrician Wiring Check the wire connections if loose repair or replace the terminal If wires are off refer t
32. tor and the earth wire See Fig 5 6 7 Re install the components by referring to the removal procedure above 2 2 2 FAN 1 Remove the brace 2 Remove the 4 screws which fasten the condenser Figure 6 with the shroud and the basepan 3 Move the condenser sideways carefully 4 Remove the clamp which secures the fan with pliers 5 Remove the fan See Fig 7 6 Re install the components by referring to the removal procedure above Figure 7 11 2 2 3 SHROUD 1 Remove the fan Refer to section 2 2 2 2 Remove the screw which fastens the shroud 3 Remove the shroud See Fig 8 4 Re install the component by referring to the removal procedure above 2 3 ELECTRICAL PARTS 2 3 1 OUTDOOR MOTOR 1 Remove the clamp cord and disconnect a wire housing in control box Refer to section 2 1 2 2 Remove the fan Refer to section 2 2 2 3 Remove the 2 screws which fasten the motor See Fig 9 4 Remove the motor 5 Re install the components by referring to the removal procedure above 2 3 2 INDOOR MOTOR Refer to section 2 2 1 2 3 3 COMPRESSOR 1 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 venting the Freon Leave the valve in place after servicing the system 2 Disconnect the 3 leads from the compressor 3 After purging the unit complet
33. unit make an insulation except OFF or O of the ROTARY SWITCH resistance test to protect the customer from being 4 The value should be over 2MQ exposed to shock hazards O 1 1 SPECIFICATIONS Cooling Electric Heater Electric Heat Electric Heat Min Circuit Model Name Cooling Btu h Cooling Watts W EER Btu h Amps A Protection Amps LP120CEM 11800 11500 1055 1025 11 2 11 2 20 Cooling Heat Pump Electric Cooling Electric Cycle Electric Heat Electric Heat Min Circuit Model Cooling Btu h watts W EER Heat Btu h Btu h Amps A Protection Amps LPO90HEM 9300 9000 800 775 11 6 11 6 8200 8000 3 4 3 4 11900 9900 3 2 3 5 20 LP120HEM 12100 11800 1090 1065 11 1 11 1 10900 10700 3 3 3 3 11900 9900 4 4 4 8 20 LP 120 C M2 12 345 Digits 1 2 LG Packaged Terminal Air Conditioner 6 7 8 Digits 3 4 Unit Cooling Capacity 07 7 000 Btu h 09 9 000 Btu h 12 12 000 Btu h 15 15 000 Btu h Digit 5 Serial No Digit 6 Product Type C Air Conditoner H Heat Pump Digit 7 Control Type M Mechanical Control Digit 8 Electric Heating Capacity 2 2 0 kW 3 3 5 kW 5 5 0 kW 1 2 features Unit Features The PTAC has many features some of which are different than those found on conventional PTAC units The servicer must be familiar with these features in order to properly service the unit
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