http://www.lgservice.com LG LG Packaged Terminal Air Conditioner/Heat Pump SERVICE MANUAL CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • FOR AUTHORIZED SERVICE ONLY.
CONTENTS 2.4.3 CAPILLARY TUBE...................................18 1. PREFACE 3. INSTALLATION 1.1 SPECIFICATIONS...............................................3 1.2 FEATURES AND BENEFITS..............................5 1.3 CONTROL LOCATIONS .....................................6 1.4 ADDITIONAL CONTROLS ..................................9 3.1 HOW TO INSTALL THE UNIT...........................21 3.2 WALLSLEEVE INSTALLATION ........................22 3.2.1 WALL SLEEVE INSTALLATION DATA ...22 3.2.
1.1 SPECIFICATIONS LP 12 0 C E M 1 12 34 5 6 7 8 9 Digits 1,2 - LG Packaged Terminal Air Conditioner 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 Models Cooling Capacity Heating Capacity W Btu/h W Btu/h Electric Heatier Capacity W Power Input Cooling/Heating W Running Current Cooling/Heating A Starting Current Cooling/Heating A EER W/W Btu/h.
Models Cooling Capacity Heating Capacity W Btu/h W Btu/h Electric Heater Capacity W Power Input Cooling/Heating W Running Current Cooling/Heating A Starting Current Cooling/Heating A EER W/W Btu/h.W COP W/W Power Supply Ø / V / Hz Air Flow Rate Indoor,Max m3G/min(cfm) Outdoor,Max m3G/min(cfm) Moisture Removal l/h Sound Level Indoor,H/M/L dB(A)+3 Outdoor,Max dB(A)+3 Refrigerant & Charge g(oz) Compressor Type Model Motor Type Oil Type Oil Charge cc O.L.
1.2 FEATURES AND BENEFITS 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.
• Indoor Filters The unit uses two indoor filters which slide in and cut easily. The filters may be cleaned by washing and brushing without removing the front grille. • Rotary Compressor The unit uses a rotary compressor for quiet, reliable operation and long life. • 2 Position Discharge Grille The discharge grille can provide air flows upward at an angle of 40 off vertical or 15 degree off vertical.
1.3 CONTROL LOCATIONS • OPERATION ELECTRIC HEATING MODEL COOLING ONLY 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. OPERATION MODE SELECTOR OFF Turns air conditioner off. LOW FAN Low speed fan operation without cooling. HIGH FAN High speed fan operation without cooling.
• ELECTRONIC CONTROLS The controls will look like one of the following. FAN SPEED • Every time you push this button, it cycles through the settings as follows: {High(F2) → Low(F1) → High(F2) → Low(F1)} E/SAVE 'F HEAT FAN HIGH COOL LOW TIMER MODE FAN TIMER POWER TEMP ON OFF • To turn the air conditioner ON, push this button. To turn the air conditioner OFF, push the button again. • This button takes priority over any other button.
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.
• 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.
• REMOTE/LOCAL CONTROL When remote/local switch #1 is on, it allow the unit to operate by the 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 cycle 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.
• 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.
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 Figure 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.
2.1.2 CONTROL BOX 1. Remove the front grille. (Refer 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. Figure 2 4. Remove the control box cover. (See Figure 3) 5. Disconnect wire housings on the control box. Figure 3 6. Pull the control box assembly out from the unit. (See Figure 4) 7. Re-install the components by referring to the removal procedure.
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. 5) 4. Remove the 3 screws which fasten the electric heater assembly.(Electric heater model only) (See Fig.5). Figure 5 5. Loosen the hexagon screw with the Hexwrench(See Fig.6) Figure 6 6. Remove the 4 screws which fasten the indoor motor and the earth wire. (See Fig.
2.2.3 SHROUD 1. Remove the axial fan. (Refer to section 2.2.3) 2. Remove the 4 screws which fasten the condenser with the shroud and the basepan. 3. Remove the shroud. 4. Re-install the component by referring to the removal procedure. 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 axial fan. (Refer to section 2.2.3) 3. Remove the 2 screws which fasten the motor. (See Figure 10) 4. Remove the motor 5.
2.3.5 POWER CORD 1. Remove the control box. (Refer to section 2.1.2) 2. Disconnect the grounding screw from the control box. 3. Disconnect 2 receptacles. 4. Remove a screw which fastens the clip cord. 5. Separate the power cord from the control box. (See Figure 13) 6. Re-install the component by referring to the removal procedure, above. (Use only one ground-marked hole for ground connection.) 7. If the supply cord of this appliance is damaged, it must be replaced by an exact replacement part.
2.4 REFRIGERATION CYCLE CAUTION Discharge 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. 2.4.1 CONDENSER 1. Remove the brace and the shroud. (Refer to section 2.2.2) 2. Remove the 4 screws which fasten the shroud. (Refer to section 2.2.2) 3.
NOTES — Replacement of the refrigeration cycle. 1. When replacing the refrigeration cycle, be sure to discharge 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. After discharging the unit completely, remove the desired component, and unbraze the pinch-off tubes. 3.
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.
3. INSTALLATION Dimension of air conditioner 3.1 HOW TO INSTALL THE UNIT 1,066 mm (42") CAUTION • There are sharp edges that can cause serious cuts. • When lifting the air conditioner, it is HEAVY. Use 2 people to lift. 406 mm (16") For existing sleeve, you should measure the wall sleeve dimensions. Install the new air conditioner according to these installation instructions to achieve the best performence.
3.2 WALL SLEEVE INSTALLATION 3.2.1 Wall Case Installation Data General Generally, units are installed 3" to 5" above the floor (flush to finished floor installation is possible) as near to the center of the room as possible; underneath a window or a glass panel is typical. Normal installation of the wall case allows installation flexibility; from flush with the finished interior wall to a minimum of 1/4" of the wall case extending beyond the finished exterior of the building.
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. 3.2.2 PREPARATION OF THE FRONT GRILLE Carefully remove shipping tape from the front grille. The wall case should be level from side to side and from level to 1/4 bubble tilt to the outdoors.
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—25— WALL RECEPTACLE (BY OTHERS) 2" MIN. CAULK* POWER SUPPLY CONDUIT OUTDOOR GRILLE STEEL LINTEL CAULK* 1/4" MIN. WALL CASE MOUNTING SCREWS BY INSTALLER 20-7/8" (RAB71) 21" (RAB77) RAB71 13-3/4" RAB77 13-7/8" *Caulk around perimeter of wall case all four sides where it joins the building - Interior and Exterior. FINISHED FLOOR OR TOP OF CARPET CAULK* ROOM CABINET CAULK* Cord Set Connected FINISHED FLOOR OR TOP OF CARPET 3" MIN. 5" MAX.
3.2.3 UNIT INSTALLATION 1. Remove the shipping screw from the ventilation door. (See Figure 20) Figure 20 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 21) Figure 21 3. Slide the unit into the wall sleeve and secure with 6 screws through the unit flange holes. (See Figure 22) Figure 22 4. Reinstall the front grille by hooking the top over the unit top, then pushing it in at the bottom.
3.3 ELECTRICAL REQUIREMENTS 3.3.1 ELECTRICAL DATA (FOR 265V MODEL) 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 is still energized. 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).
4. FIELD INSTALLED ACCESSORIES Note: The installation and servicing of this equipment must be performed by qualifieed. experienced technicians NOTICE: Warnings and Cautions appear at appropriate sections throughout this manual. Read these carefully. WARNING - Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. CAUTION - Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
Condensate Disposal Pump Kit Installation 2. Unplug and remove the PTAC chassis from the wallsleeve. Move the chassis where the front and back of the chassis can be easily accessed. Part No: AYSB3101 3. Remove the top cover assembly, net steel.(Figure 27) Figure 27 Description The internal condensate pump serves as a means for disposing of condensate generated during heat pump operation by transferring it to the indoor coil.
Figure 29 11. Place the pump bracket onto the end of the pump by feeding the pump cord through the hole in the bracket and pushing the bracket onto the threads of the pump. Slide the supplied washer onto the threads of the pump. Screw the pump nut onto the threads of the pump and tighten the nut so that the bracket is secure against the pump. (Figure 32) Condensate Tube Figure 32 7. Position the condensate tube through existing hole (located right side of blower deck). 8.
15. Place one of the hose clamps over one end of the 16-inch vinyl hose. Place the same end over the barbed discharge tube of the pump assembly. Place a hose clamp on the other end of the 16 inch hose. Place this same end over the shorter leg of the overflow tube and secure the hose with the hose clamp. (Figure 34) 18. To gain access inside the control panel, remove the knobs and escutcheon. Remove the two screws holding the panel in position.
Architecture Grille Aluminum - Single Pack Note: A baffle kit must not be used with a stamped aluminum grille on any PTAC installation. Part No: AYAGALA01 Stamped Aluminum Grille Stamped Aluminum Grille 1. Prepare the wall sleeve for installation of the grille by removing the cardboard stiffener and rear enclosure panel from the sleeve. These items may be removed from inside of the building.
4. Secure the grille to the sleeve by tightening the four screws to their corresponding holes in the grille. 5. Remove the wire handle after the installation is complete. Note: The stamped aluminum grille includes 6 screws, washers, nuts, and plastic grommets. The architectural grille includes 4 screws. 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.
contact the front edge of sleeve. Secure the chassis to the wall sleeve on each side with screws provided. Figure 39 – Outdoor Drain Kit Installation Re-install the cabinet front. DRAIN FITTING PLATE B 1/2" DRAIN FITTING See the following pages for installation instructions of indoor drain kit. BLANK-OFF PLATE C Figure 40 Figure 41 GASKETS A MTG.
Indoor Drain Kit Installation Leveling Legs The internal drain is installed on the bottom of the wall sleeve when it is required to drain the condensate into a drain system inside of the building. The components of the wall sleeve drain kit are shown in Detail A. Use components C (2), D, E, mounting screws (6) and the Outdoor drain fitting. Part No: AYLL101 1. The components D, E, and drain fitting of the kit are mounted on the bottom of the wall sleeve prior to the installation of the sleeve.
Leveling Leg Assembly Installation on Wall Sleeve To install the leveling leg assembly, complete the following: 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. 1. Drill two 1/8-inch holes in each side of the wall sleeve, as shown in Figure 45, using the leveling leg assembly as a template. Locations near the front of the sleeve provide more support. 2.
Hard Wire Kit 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.
265 Volt Units Figure 48 - Mounting Hard Wire Junction Box Kit 1. Remove and discard the red lead from the wire assembly . 2. Connect the black lead to the center terminal of the fuse holder. Wall Sleeve 3. Connect the white lead to the common (C) terminal on the capacitor. Ground Wie with Eyelet Terminal 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. Cover plate Conduit Metal Box with Straight Clamp 6.
Fuse Holder Kit CAUTION Part No: AYFH1101 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 these codes could result in overheating and equipment failure.
2. To gain access inside the control panel, after removing the knobs and escutcheon, remove the screws holding panel in position. Tilt control panel forward, being careful not to pinch any wires. (Figure 50) Figure 51 - Fuse Holder Diagram Control Panel Installation FUSEHOLDERS 3. As viewed from the front, remove both knockouts on the control panel. WH GN BK 4. Insert two fuse holders from the front. The fuse holders should be oriented so the quick-connect tabs are toward the center of the unit.
Remote Escutcheon Kit Part No: AYRE110 Description This kit provides an attractive replacement escutcheon (see Figure 54). The kit allows the removal of control knobs and graphics, which are not required when a wall thermostat is used to control the unit. Receiving Figure 55 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.
5. Replace the escutcheon with the one from this kit by inserting the tabs at the top of the escutcheon into the retaining holes and laying the escutcheon flat on the control panel. Installation The installation and servicing of the equipment referred to in this booklet should be performed by qualified, experienced technicians. 6. Replace the front by reversing steps 1 through 4. 7.
Note: The proper subbase must be ordered to obtain the correct electrical receptacle. (Figure 62) Figure 60 - Dimensions 13 3/4" 8. After wiring is complete, mount covers A and F to the subbase with provided screws. (Figure 59) Wall Sleeve (Outdoor Side) 9. When installing optional accessories to the subbase, refer to each installation instruction for that accessory.
5. PERFORMANCE DATA Air conditioner and Heat Pump Performance Data LP070CED1 LP090CED1 LP120CED1 LP150CED1 LP070HED1 LP150HED1 LP090HED1 LP120HED1 Voltage (V) Cooling Data Cooling Capacity (Btu/h) Cooling Amps (A) Cooling Power (W) EER (Btu/h.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 (Wet)@0.3ESP(Hi) Indoor CFM (Wet)@0.3ESP(Lo) Indoor CFM (Dry)@0.3ESP(Hi) Indoor CFM (Dry)@0.
Cooling Wattage-Air conditioners and Heat Pumps Model Temperature LP070CED1 LP090CED1 LP120CED1 LP150CED1 Outdoor Air Return Air Total Wattage Input Total Wattage Input Total Wattage Input Dry Bulb Wet Bulb Min Max Min Max Min Max Rating wattage 620 680 780 840 1065 1145 80 630 690 790 850 1075 1155 100 70 630 690 790 850 1075 1155 60 625 685 785 845 1070 1150 80 615 675 775 835 1060 1140 90 70 615 675 775 835 1060 1140 60 610 670 770 830 1055 1135 80 605 665 765 825 1050 1130 80 70 605 665 765 825 105
Cooling Change of Temperature-Air conditioners and Heat Pumps Model LP150CED1 Room Air Room Air LP070CED1 LP090CED1 LP120CED1 Dry Wet Bulb Temperature Across Indoor Coil ( T) Min Max 7450 7750 185 225 1 3 8 13 19 22 30 33 9 14 18 21 26 29 35 36 12 15 17 20 22 24 Temperature Across Indoor Coil ( T) Min Max 8750 9050 230 260 2 6 11 14 19 22 28 30 11 14 18 20 24 27 32 33 12 14 16 18 20 22 Temperature Across Indoor Coil ( T) Min Max 11650 11950 300 330 1 5 9 13 18 22 26 30 9 13 15 20 23 26 29 33 9 13
Heating Change of Temperature - Heat Pumps Room Air Room Air LP070HED1 Model LP090HED1 Dry Wet Bulb Temperature Across Indoor Coil ( T) Min Max 6100 6300 220 250 22 24 24 25 26 27 19 22 21 24 23 25 17 20 19 22 21 24 Temperature Across Indoor Coil ( T) Min Max 7900 8100 260 290 24 27 26 29 28 30 22 24 24 26 25 28 20 22 22 24 24 25 Bulb Rating Btu/h Rating CFM 50 45 40 85 75 65 85 75 65 85 75 65 LP120HED1 LP150HED1 Temperature Across Indoor Coil ( T) Min Max 10700 10900 330 360 27 30 29 32 31 34
Heating Wattage - Heat Pumps Temperature Outside Air Dry Bulb Room Air Dry Bulb Rating wattage 50 45 40 35 585 80 75 70 65 85 80 75 70 65 85 80 75 70 65 85 80 75 70 65 LP070HED1 LP090HED1 LP120HED1 LP150HED1 Total Wattage Input Min Max Total Wattage Input Min Max Total Wattage Input Min Max Total Wattage Input Min Max 975 1065 1045 1025 1005 980 1035 1010 990 965 945 985 975 955 930 910 970 945 925 900 885 1320 1405 1385 1355 1335 1310 1360 1335 1310 1280 1265 1305 1280 1255 1230 1210 1250
Heat Pump Reverse Cycle Heating Capacity Model Voltage Amps Watts Btu/h COP CFM(Dry) Heating Btu/h Outdoor Ambient Rating Point Watts Outdoor Ambient Rating Point LP070HED1 LP090HED1 LP120HED1 LP150HED1 265 2.2 550 6200 3.3 300 265 2.7 690 8000 3.4 300 265 3.9 990 10800 3.2 420 265 5.3 1335 13200 2.
6. TROUBLESHOOTING GUIDE 6.1 OUTSIDE DIMENSIONS 406mm (16") 1,066mm (42") 406mm (16") 505mm (20") 6.2 PIPING SYSTEM Following is a brief description of the important components and their functions in the refrigeration system. Refer to Figure 63 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle.
6.3 TROUBLESHOOTING GUIDE In general, possible trouble is classified in two causes. The one is Starting Failure which is caused from an electrical defect, and the other is Ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application. Unit is running but cooling is ineffective Ineffective Cooling Check of cold air circulation for smooth flow. Check of outdoor coil (heat exchanger) & the fan operation. Dirty indoor coil (Heat exchanger) Check gas leakage.
Fails to Start Check power source. Check circuit breaker and fuse. Check control switch setting. Gas leakage of feeler bulb of thermostat Check control switch. Only compressor fails to start. Only fan fails to start. Improper wiring. Drop of power voltage. Improper thermostat setting Defect of fan motor capacitor. Defect of compressor capacitor. Loose terminal connection. Check capacitor. Irregular motor resistance ( ). Irregular motor insulation ( ). Improper wiring Replacement.
COMPLAINT Fan motor will not run. CAUSE REMEDY 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.
COMPLAINT Compressor will not run, but fan motor runs. CAUSE REMEDY 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 to 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.
COMPLAINT Compressor cycles on overload. Insufficient cooling or heating Excessive noise. REMEDY CAUSE Voltage Check the voltage. See the limits on the preceding 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. Condenser air flow restriction Remove the cabinet.
7. SCHEMATIC DIAGRAM NEUTRAL LIVE WH BK In part "A", there are 3 types. GN/YL BK1 RD BK2 BL BK3 RD BK4 BL Type.1 OR TB1 WH OR TB2 OR OUTDOOR FAN MOTOR BK BK BL RD OR(BR) YL BK OR(BR) YL Type.2 BK OUTDOOR FAN MOTOR INDOOR COIL THERMISTOR INDOOR AIR THERMISTOR BK BK BL RD OR(BR) YL BL OR(BR) YL Type.3 OUTDOOR FAN MOTOR "A" BK INDOOR COIL THERMISTOR BK BL RD OR(BR) YL OR(BR) YL F INDOOR AIR THERMISTOR OUTDOOR FAN MOTOR BK RD BL Type.
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