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LG Packaged Terminal Air Conditioner/Heat Pump Service Manual
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LG Packaged Terminal Air Conditioner/Heat Pump Service Manual

LG Packaged Terminal Air Conditioner/Heat Pump Service Manual

Packaged terminal air conditioner/heat pump
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See also: Owner's Manual
LG Packaged Terminal
Air Conditioner/Heat Pump

SERVICE MANUAL

http://www.lgservice.com
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• FOR AUTHORIZED SERVICE ONLY.
LG

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Summary of Contents for LG Packaged Terminal Air Conditioner/Heat Pump

  • Page 1: Service Manual

    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.

  • Page 2: Table Of Contents

    The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit. 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 Digit 6 - Product Type Digits 3,4 - Unit Cooling Capacity C = Air Conditoner...
  • Page 3 1.1.1 COOLING Models LYC073ATA02 LYH093ATA32 LYC123ATA32 2.17 2.23 2.58 2.64 3.37 3.46 Cooling Capacity Btu/h 7400 7600 8800 9000 11500 11800 Heating Capacity Btu/h Electric Heater Capacity Btu/h 8530 11940 11940 Power Input Cooling/Heating 1025 1055 Running Current Cooling/Heating Starting Current Cooling/Heating 3.68 3.66...
  • Page 4 1.1.2 HEATING Models LYH07EATA32 LYH09EATA22 LYC12EATA32 2.14 2.73 3.46 Cooling Capacity Btu/h 7300 9300 11800 1.82 2.35 Heating Capacity Btu/h 6200 8000 Electric Heater Capacity Btu/h 6823 12623 12623 Power Input Cooling/Heating 1,105 Running Current Cooling/Heating Starting Current Cooling/Heating 3.39 Btu/h.W 11.6 Power Supply...

  • Page 5: Features And Benefits

    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 6 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 7: Control Locations

    1.3 CONTROL LOCATIONS • OPERATION ELECTRIC HEATING MODEL COOLING ONLY MODEL TEMPERATURE CONTROL OPERATION MODE SELECTOR Set the Thermostat control to the desired temperature Turns air conditioner off. mark 5 (the mid-point is a good starting position). If the LOW FAN Low speed fan operation without cooling.

  • Page 8: Electronic Controls

    • 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 HEAT HIGH HIGH POWER COOL COOL TIMER...

  • Page 9: Additional Controls

    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.

  • Page 10: Temperature Limiting

    • 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.

  • Page 11: Energy Saver

    • 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.
  • Page 12 • 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.

  • Page 13: Disassembly Instructions

    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.

  • Page 14: Control Box

    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.

  • Page 15: Air Handling Parts

    2.2 AIR HANDLING PARTS 2.2.1 ELECTRIC HEATER (ELECTRIC HEATER MODEL ONLY) 1. Remove the front grille.(Refer to section 2.1.1) 2. Remove the control box assembly. (Refer to section 2.1.2) 3. Remove the 4 screws which fasten the Evaporator. Figure 5 (See Figure 5) 4.

  • Page 16: Cross Flow Fan

    2.2.2 CROSS FLOW FAN 1. Remove the front grille. (Refer to section 2.1.1) 2. Remove the control box assembly. (Refer to section 2.1.2) 3. Remove the Air-Guide Assembly from the unit. (Refer to section 2.2.1) 4. Loosen the screw on the cross flow fan. (See Figure 9) Figure 9 5.

  • Page 17: Shroud

    2.2.4 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. (See Figure 11) 3. Remove the shroud. 4. Re-install the component by referring to the removal procedure.

  • Page 18: Power Cord

    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 17) 6.

  • Page 19: Refrigeration Cycle

    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.
  • Page 20 NOTES — Replacement of the refrigeration cycle. 1. When replacing the refrigeration cycle, be sure to 6. Recharge as follows : discharge the refrigerant system using a 1) Refrigeration cycle systems are charged from the refrigerant recovery system. high-side. If the total charge cannot be put If there is no valve to attach the recovery system, in the high-side, the balance will be put in the install one (such as a WATCO A-1) before venting...
  • Page 21 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. Figure 16 A-Pulling Vacuum Figure 16 B-Charging —21—...

  • Page 22: Installation

    3. INSTALLATION Dimension of air conditioner 3.1 HOW TO INSTALL THE UNIT CAUTION 1,066 mm (42") • 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...

  • Page 23: Wallsleeve Installation

    3.2 WALL SLEEVE INSTALLATION 3.2.1 Wall Case Installation Data framing, moving electrical outlets, and other expensive modifications. General Generally, units are installed 3" to 5" above the floor For existing construction it is important that carpentry, (flush to finished floor installation is possible) as near to masonry and electrical work be performed by the center of the room as possible;...

  • Page 24: Preparation Of 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...
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  • Page 26 —26—...

  • Page 27: Unit Installation

    3.2.3 UNIT INSTALLATION 1. Remove the shipping screw from the ventilation door. (See Figure 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 Figure 18) Figure 18 3.

  • Page 28: Electrical Requirements

    3.3 ELECTRICAL REQUIREMENTS 3.3.1 ELECTRICAL DATA (FOR 230/208V MODEL) CAUTION 1. Do not use an extension cord with this unit. Tandem 2. When the unit is in the OFF position, the power supply to the 15 A electrical controls is still energized. 3.

  • Page 29: Field Installed Accessories

    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.
  • Page 30 Condensate Disposal Pump Kit 1. Remove front plastic cover by rotating bottom outward and Installation then lifting up and out from chassis. 2. Unplug and remove the PTAC chassis from the wallsleeve. Part No: AYSB2101 Movethe chassis where the front and back of the chassis can be easily accessed.
  • Page 31 7. Remove the screw that attaches the electric heater wire to 11. Install tube #1 and tube #2 (ref. fig. 31) on the pump the side of the indoor fan housing. assembly using the rubber elbows as shown in fig. 28. 8.
  • Page 32 15. Assembly the unit back following the Figure 31 reverse order of disassembly. Spraying NOTE: All tube should be inserted into rubber Tube Pump elbows by at least 1/2 inch assembly Figure 33 Tube #1 Rubber elbows(3) Tube #2 Figure 34 14.
  • Page 33 Architecture Grille Aluminum - Single Pack Note: A baffle kit must not be used with a stamped aluminum grille Part No: AYAGALA01 on any PTAC installation. 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.

  • Page 34: Drain Installation

    4. Secure the grille to the sleeve by tightening the four screws Receiving to their corresponding holes in the grille. Upon receipt of the product, inspect the shipping carton for 5. Remove the wire handle after the installation is complete. signs of visible damage.
  • Page 35 Figure 36 – Outdoor Drain Kit Installation contact the front edge of sleeve. Secure the chassis to the wall sleeve on each side with screws provided. Re-install the cabinet front. See the following pages for installation instructions of indoor DRAIN FITTING BLANK-OFF PLATE B PLATE C...
  • Page 36 Indoor Drain Kit Installation Leveling Legs The internal drain is installed on the bottom of the wall sleeve Part No: AYLL101 when it is required to drain the condensate into a drain system inside of the building. Description The components of the wall sleeve drain kit are shown in Leveling legs are designed to provide extra front support and Detail A.
  • Page 37 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 1. Drill two 1/8-inch holes in each side of the wall sleeve, as around screws to prevent water leaks.
  • Page 38 Hard Wire Kit WARNING Part No: AYAGALA01 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 Description serious injury.
  • Page 39 208/230 Volt Units Figure 45 - Mounting Hard Wire Junction Box Kit 1. Remove and discard the white lead from the wire assembly. Wall Sleeve 2. Connect the black lead to the line 2 terminal on the control board. 3. Connect the red lead to the common (C) terminal on the Ground Wie capacitor.
  • Page 40 Fuse Holder Kit CAUTION Use Copper Conductors Only! Part No: AYFH1101 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.
  • Page 41 2. To gain access inside the control panel, after removing the Figure 49 - Fuse Holder Diagram knobs and escutcheon, remove the screws holding panel in Control Panel Installation position. FUSEHOLDERS Tilt control panel forward, being careful not to pinch any wires.
  • Page 42 Remote Escutcheon Kit Part No: AYRE110 Description This kit provides an attractive replacement escutcheon (see Figure 52). 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 53 Upon receipt of the product, inspect the shipping carton for...
  • Page 43 5. Replace the escutcheon with the one from this kit by Installation inserting the tabs at the top of the escutcheon into the The installation and servicing of the equipment referred to in retaining holes and laying the escutcheon flat on the this booklet should be performed by qualified, experienced control panel.
  • Page 44 Note: Figure 58 - Dimensions The proper subbase must be ordered to obtain the correct electrical receptacle. (Figure 60) 13 3/4" 8. After wiring is complete, mount covers A and F to the Wall Sleeve subbase with provided screws. (Figure 57) 2 3/4"...

  • Page 45: Ferformance Data

    5. PERFORMANCE DATA Air Conditioner Performance Data LP070CE* LP090CE* LP120CE* LP150CE* Voltage (V) Cooling Data Cooling Capacity (Btu/h) 7,400 7,600 8,800 9,000 11,500 11,800 14,100 14,300 Cooling Amps (A) Cooling Power (W) 1045 1075 1470 1490 EER (Btuh/Watt) 12.5 12.5 11.6 11.6 11.0...
  • Page 46 Cooling Wattage - Air Conditioners Model LP070CE* LP090CE* LP120CE* LP150CE* Temperature Outdoor Return Air Total W attage Total W attage Total W attage Total W attage Dry Bulb Wet Bulb Input Input Input Input Rating W attage 1045 1090 1045 1090 1050 1180...
  • Page 47 Cooling Wattage - Heat Pumps Model LP070HE* LP090HE* LP120HE* LP150HE* Temperature Outdoor Return Air Total W attage Total W attage Total W attage Total W attage Dry Bulb Wet Bulb Input Input Input Input Rating W attage 1120 1145 1430 1460 1120 1230...
  • Page 48 Cooling change of temperature - Air Conditioners Room Air Room Air LP070CE* LP090CE* LP120CE* LP150CE* Temperature Across Temperature Across Temperature Across Temperature Across Bulb Bulb Indoor Coil (∆ T) Indoor Coil (∆ T) Indoor Coil (∆ T) Indoor Coil (∆ T) Rating Btu/h 7000 7600...
  • Page 49 Heating Change of Temperature - Heat Pumps Model Room Air Room Air LP070HE* LP090HE* LP120HE* LP150HE* Temperature Across Temperature Across Temperature Across Temperature Across Bulb Bulb Indoor Coil (∆ T) Indoor Coil (∆ T) Indoor Coil (∆ T) Indoor Coil (∆ T) Rating Btu/h 6200 6400 8200...

  • Page 50: Outside Dimensions

    6. TROUBLESHOOTING GUIDE 6.1 OUTSIDE DIMENSIONS 1,066mm (42") 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 61 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle. ROOM AIR CONDITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS...

  • Page 51: Troubleshooting Guide

    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...
  • Page 52 Fails to Start Check power source. Check circuit breaker and fuse. Check control switch Gas leakage of feeler bulb setting. of thermostat Check control switch. Only compressor fails to Only fan fails to start. start. Improper wiring. Drop of power voltage. Improper thermostat setting Defect of fan motor capacitor.
  • Page 53 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.

  • Page 54: Room Air Conditioner Voltage Limits

    COMPLAINT CAUSE REMEDY Compressor will not run, Voltage Check voltage. See the limits on the preceding. but fan motor runs. 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.
  • Page 55 REMEDY COMPLAINT CAUSE Compressor cycles Voltage Check the voltage. See the limits on the preced- on overload. 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.

  • Page 56: Schematic Diagram

    7. SCHEMATIC DIAGRAM MECHANICAL P/NO:3850A20594J CN-TRANS CN-EXT CN-COMP CN-N CN-L CN-IDAT CN-IDPT CN-EXTN(N) CN-IDF CN-ODF RY-HEST1 RY-OFD —56—...

  • Page 57: Exploded View

    8. EXPLODED VIEW 8.1 MECHANICAL COOLING 552114 35211A 552113 352390 152302-1 149400 148000 349600-1 435300 346810 359011 554030 337000 546810 135515 349600 354210 567480-4 559011 549990 W50400 130411 135500 263230-1 249951 135312 554170 330870 152302 268711-2 238310 149410 135511 135800 567502 237200 249941-1...
  • Page 58 8.2 MECHANICAL HEATLING 552113 552112 352115 352116 552116 352390 152302-1 149400 148000 435300-1 349600-1 435300 346810 359011 554030 337000 546810 135515 349600 354210 567480-4 559011 549990 552206 W50400 130411 135500 263230-1 753010 249951 135312 554170 330870 152302 268711-2 238310 149410 135511 135800 567502...
  • Page 59 Setember, 2007 P/No.: 3828A20308L Printed in Korea...

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