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LG LP090CED1 Service Manual

LG LP090CED1 Manual

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LG LP090CED1 | Service Manual - Page 1
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.
LG LP090CED1 | Service Manual - Page 2
INSTRUCTIONS 2.1 MECHANICAL PARTS 13 2.1.1 FRONT GRILLE 13 2.1.2 CONTROL BOX 14 2.2 AIR HANDLING PARTS 15 TROUBLESHOOTING GUIDE 51 7. SCHEMATIC DIAGRAM 56 8. EXPLODED VIEW 57 1. PREFACE This SERVICE MANUAL provides various service information, including the mechanical and electrical parts
LG LP090CED1 | Service Manual - Page 3
6 7 8 9 Digits 1,2 - LG Packaged Terminal Air Conditioner Digits 3,4 - Max dB(A)+3 60/58 Refrigerant & Charge g(oz) R22 ) - Special Function Electric Heater LP090CED1 2608 8900 3700 810 3.2 -/3.2 16*19-7/8 39.3(87) YA Thermistor O O 2/2/2 Manual 54˚F~86˚F(12.2˚C~30˚C) 54˚F~86˚F(12.2˚C~30˚C)
LG LP090CED1 | Service Manual - Page 4
/-/47 49/-/47 Outdoor,Max dB(A)+3 60/58 60/58 63/61 63/61 Refrigerant & Charge g(oz) R22, 625(22.0) R22, 730(25.8) R22, 970(34 /Heat 2/2/2 2/2/2 2/2/2 2/2/2 Airflow Direction Control(up&down) Manual Manual Manual Manual Airflow Direction Control(left&right) - - - - Remocon
LG LP090CED1 | Service Manual - Page 5
on conventional PTAC units. The servicer must be familiar with these features in order to properly service the unit. VERTICAL AIR DEFLECTOR 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
LG LP090CED1 | Service Manual - Page 6
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 voltage power source which can accommodate a large variety of thermostat choices-manual, auto changeover, or programmable. A remote thermostat can also be
LG LP090CED1 | Service Manual - Page 7
1.3 CONTROL LOCATIONS • OPERATION 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
LG LP090CED1 | Service Manual - Page 8
• 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)} 'F TEMP E/SAVE HEAT FAN COOL HIGH LOW TIMER MODE FAN TIMER ON OFF POWER • To turn the air
LG LP090CED1 | Service Manual - Page 9
. • 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 servicer has to check switches and ensure the switches are in the desired position. REMOTE ON ON ON ON ON OFF LOCAL OFF OFF OFF OFF
LG LP090CED1 | Service Manual - Page 10
. • 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 ON OFF LOCAL OFF OFF OFF
LG LP090CED1 | Service Manual - Page 11
supply the 24 Volt AC. When you install the digital/electronic thermostat, you must set it to 24 Volt AC. See the installation Instruction in this manual for the Remote Wall Thermostat. 24 Volt-N 24 Volt-L Compressor Heater Reversing Valve High Fan Low Fan GL GH O W Y R C (Molex Housing Spec 396
LG LP090CED1 | Service Manual - Page 12
supply the 24 Volt AC. When you install the digital / electronic thermostat, you must set it to the 24 Volt AC. See the installation Instruction in this manual for the Remote Wall Thermostat. 24 Volt-N 24 Volt-L Compressor Heater Reversing Valve High Fan Low Fan LO LI GL GH O W Y R C (Molex Housing
LG LP090CED1 | Service Manual - Page 13
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.
LG LP090CED1 | Service Manual - Page 14
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
LG LP090CED1 | Service Manual - Page 15
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
LG LP090CED1 | Service Manual - Page 16
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 (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
LG LP090CED1 | Service Manual - Page 17
.) 7. If the supply cord of this appliance is damaged, it must be replaced by an exact replacement part. (The special cord means the cord which install the components by referring to the removal procedure, above. WARNING After servicing control box ,make sure that AC and DC wires are separated and
LG LP090CED1 | Service Manual - Page 18
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
LG LP090CED1 | Service Manual - Page 19
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. Solder
LG LP090CED1 | Service Manual - Page 20
, brazing equipment. pinch-off tool capable of making a vapor-proof seal, leak detector, tubing cutter, hand tools to remove components, service valve. CONDENSER (HIGH PRESSURE SIDE) COMPOUND GAUGE MANIFOLD GAUGE B A CAPILLARY TUBE SEE INSETS BELOW EVAPORATOR (LOW PRESSURE SIDE) COMPRESSOR
LG LP090CED1 | Service Manual - Page 21
Use 2 people to lift. 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. All wall sleeves used to mount the new air conditioner must be in good structural condition and have
LG LP090CED1 | Service Manual - Page 22
to minimize installation problems and assure you of trouble-free installation. Refer to page 24 for required wall opening dimensions. Minimum recommended interior and exterior case projection for standard wall thicknesses are shown in the drawings in this manual
LG LP090CED1 | Service Manual - Page 23
must be removed and a suitable frame constructed to secure the wall case and provide adequate support for case and chassis. Preparation of the Wall Case for All Types of Construction As shipped, the LG wall sleeve is ready for installation. Do not remove the stiffener from inside the wall case
LG LP090CED1 | Service Manual - Page 24
-24-
LG LP090CED1 | Service Manual - Page 25
Cord Set Connected WALL SECTION - DETAILED SIDE VIEW FRAME AND BRICK VENEER INSTALLATION Sub-Base Connected -25- CAULK* RAB71 13-3/4" RAB77 13-7/8" 20-7/8" (RAB71) 21" (RAB77) STEEL LINTEL CAULK* ROOM CABINET CAULK* MOUNTING SCREWS BY INSTALLER 2" MIN. WALL CASE CAULK* 1/4" MIN.
LG LP090CED1 | Service Manual - Page 26
3.2.3 UNIT INSTALLATION 1. Remove the shipping screw from the ventilation door. (See 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 20 3. Slide the unit into the wall sleeve and secure with 6
LG LP090CED1 | Service Manual - Page 27
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. circuit breaker (2500W Heater 3.3.2 ELECTRICAL SAFETY IMPORTANT GROUNDING INSTRUCTIONS The air conditioner has a three-prong grounding plug
LG LP090CED1 | Service Manual - Page 28
servicing of this equipment must be performed by qualifieed. experienced technicians NOTICE: Warnings and Cautions appear at appropriate sections throughout this manual or property-damage-only accidents. Control Panel Key Lock Part No: AYCP101 2. Remove existing door assembly by lifting door
LG LP090CED1 | Service Manual - Page 29
Condensate Disposal Pump Kit Installation Part No: AYSB3101 Description The internal condensate pump serves as a to its installation and use. Figure 28 Mounting Screws Installation The installation and servicing of the equipment referred to in this booklet should be performed by qualified,
LG LP090CED1 | Service Manual - Page 30
Figure 29 Condensate Tube 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
LG LP090CED1 | Service Manual - Page 31
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
LG LP090CED1 | Service Manual - Page 32
Part No use. Installation The installation and servicing of the equipment referred to in opening. 4. Install the stamped aluminum grille by aligning the guide pins located in the lower right and left hand corners in Step 1 of the stamped aluminum grille instructions. 2. Turn the grille so it can be
LG LP090CED1 | Service Manual - Page 33
grommets. The architectural grille includes 4 screws. Condensate Drain kit Part No: AYDR101 Receiving Upon receipt of the product, inspect the place prior to its installation and use. Installation The installation and servicing of the equipment referred to in this booklet should be performed
LG LP090CED1 | Service Manual - Page 34
unit chassis is to be installed right away, install the condenser grille to wall sleeve with hardware provided. See condenser grille installation instructions. BLANK-OFF PLATE SHEET METAL SCREWS Figure 43 See Detail A Sleeve overflow port Do not close up this port Gasket (2) (4) Mounting Screws
LG LP090CED1 | Service Manual - Page 35
in the lower right hand corner of these instructions to locate the field drilled holes. (Two Part No: AYLL101 Description Leveling legs are designed to provide extra front support installation and servicing of this before servicing. Follow to disconnect power before servicing could result in death
LG LP090CED1 | Service Manual - Page 36
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. Adjust the leveling legs to the approximate height needed and install them on either side of the wall sleeve, using the screws provided. Bottom of
LG LP090CED1 | Service Manual - Page 37
Kit Part No: its installation and use. Installation The installation and servicing of this equipment should performed by qualified, experienced switch in the junction box. Refer to the Power Switch Installation Instructions. 4. Remove control panel assembly by removing the two screws holding control
LG LP090CED1 | Service Manual - Page 38
265 Volt Units 1. Remove and discard 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
LG LP090CED1 | Service Manual - Page 39
nameplate. Fuses may be purchased from the parts department. Note: The installation and servicing of this equipment must be performed by 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
LG LP090CED1 | Service Manual - Page 40
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) 3. As viewed from the front, remove both knockouts on the control panel. 4. Insert two fuse
LG LP090CED1 | Service Manual - Page 41
Remote Escutcheon Kit Part No: AYRE110 Description This kit provides an attractive replacement escutcheon secure place prior to its installation and use. Figure 55 Installation The installation and servicing of the equipment referred to in this booklet should be performed by qualified, experienced
LG LP090CED1 | Service Manual - Page 42
energized. Failure to disconnect power before servicing could result in death or serious injury. Subbase Part No: AYSB3101 (265V 20A) AYSB4101 carton in a dry, secure place prior to its installation and use. 1. Remove parts B and C (Figure 58, next page) from the subbase and join together using
LG LP090CED1 | Service Manual - Page 43
When installing optional accessories to the subbase, refer to each installation instruction for that accessory. Figure 58 Figure 60 - Dimensions Wall Sleeve "A" Left End View 2" (50 mm) Figure 59 - Part/Location Identification Part/Location Identification A Left Front Cover B Right Front Cover C
LG LP090CED1 | Service Manual - Page 44
(Wet)@0.3ESP(Lo) Indoor CFM (Dry)@0.3ESP(Hi) Indoor CFM (Dry)@0.3ESP(Lo) LP070CED1 1 / 265 / 60 7600 2.6 650 11.7 2 2.6 650 - 300 255 320 275 LP090CED1 1 / 265 / 60 8900 3.21 810 11 2.6 3.21 810 - 300 255 320 275 LP120CED1 1 / 265 / 60 11800 4.4 1105 10.7 3.3 4.4 1105 - 420 355 450 385 LP150CED1
LG LP090CED1 | Service Manual - Page 45
Cooling Wattage-Air conditioners and Heat Pumps Model Temperature LP070CED1 LP090CED1 LP120CED1 LP150CED1 LP070HED1 LP090HED1 LP120HED1 LP150HED1 Outdoor Air Return Air Total Wattage Input Total Wattage Input Total Wattage Input Total Wattage Input Total Wattage Input
LG LP090CED1 | Service Manual - Page 46
Cooling Change of Temperature-Air conditioners and Heat Pumps Model Room Air Room Air LP070CED1 LP090CED1 LP120CED1 LP150CED1 LP070HED1 LP090HED1 LP120HED1 LP150HED1 Dry Wet Temperature Across Temperature Across Temperature Across Temperature Across Temperature Across Temperature Across
LG LP090CED1 | Service Manual - Page 47
ampere 100 95 90 85 80 Model LP070CED1 Amperage Min Max 2.4 2.4 2.4 2.6 2.3 2.5 2.2 2.4 2.1 2.3 2 2.2 Model LP090CED1 Amperage Min Max 3.2 3.2 2.9 3.1 2.7 3 2.6 2.9 2.5 2.7 2.3 2.6 Model LP120CED1 Amperage Min Max 4.2 4.2 3.9 4.3 3.7 4.1 3.6 3.9 3.4 3.8 3.2 3.6 Model LP150CED1 Amperage Min
LG LP090CED1 | Service Manual - Page 48
Heating Wattage - Heat Pumps Temperature Outside Air Dry Bulb Room Air Dry Bulb Rating wattage 585 80 50 75 70 65 85 80 45 75 70 65 85 80 40 75 70 65 85 80 35 75 70 65 LP070HED1 Total Wattage Input Min Max 540 560 600 640 585 620 570 610 545 595 530 580
LG LP090CED1 | Service Manual - Page 49
Heat Pump Reverse Cycle Heating Capacity Model Voltage Amps Watts Btu/h COP CFM(Dry) Heating Btu/h Outdoor Ambient 62 57 52 Rating Point 47 42 37 32 27 24 Watts Outdoor Ambient 62 57 52 Rating Point 47 42 37 32 27 24 LP070HED1 265 2.2 550 6200 3.3 300 7200 6900 6500 6200 5900 5600 5300 5000 4800
LG LP090CED1 | Service Manual - Page 50
6. TROUBLESHOOTING GUIDE 6.1 OUTSIDE DIMENSIONS 1,066mm (42") 406mm (16") 505mm (20") 406mm (16") 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
LG LP090CED1 | Service Manual - Page 51
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
LG LP090CED1 | Service Manual - Page 52
Fails to Start Check power source. Check control switch setting. Only compressor fails to start. Drop of power voltage. Defect of compressor capacitor. Check capacitor. Replacement. Improper thermostat setting Loose terminal connection. Improper wiring Check circuit breaker and fuse. Gas leakage
LG LP090CED1 | Service Manual - Page 53
COMPLAINT Fan motor will not run. Fan motor runs intermittently Fan motor noise. CAUSE No power Power supply cord Rotary switch Wire disconnected or connection loose Capacitor (Discharge capacitor before testing.) Will not rotate Revolves on overload. Grommets Fan Turbo fan Loose set screw Worn
LG LP090CED1 | Service Manual - Page 54
COMPLAINT Compressor will not run, but fan motor runs. CAUSE Voltage Wiring Rotary Thermostat Capacitor (Discharge capacitor before servicing.) Compressor Overload REMEDY Check voltage. See the limits on the preceding. page. If not within limits, call an electrician. Check the wire connections,
LG LP090CED1 | Service Manual - Page 55
or heating Excessive noise. Condenser fins (damaged) Capacitor Wiring Refrigerating system Air filter Exhaust damper door Unit undersized Cross flow or fan is hitting air guide, rearrange the air handling parts. Carefully rearrange tubing not to contact, compressor, shroud, and barrier. -55-
LG LP090CED1 | Service Manual - Page 56
IDAT CN-IDPT CN-AUX_S CN-THERMO_S CN-LINK INDOOR AIR THERMISTOR INDOOR COIL THERMISTOR In part "A", there are 3 types. Type.1 OUTDOOR FAN MOTOR BK BL RD OR(BR) Type.3 OUTDOOR FAN MOTOR BK BL RD OR(BR) YL RD OR(BR) YL In part "B", there are 2 types. Type.1 INDOOR FAN MOTOR BK BL BL RD RD OR
LG LP090CED1 | Service Manual - Page 57
8.1 EXPLODED VIEW(ELECTRICAL COOLING) C 552111 552113 552114 147911 35211A 149400 D 359011 352390 152302-1 148000 349600-1 346810 435300 554030 435300-1 337000 135515 F W50400 354210 546810 349600 559011 263230-2 549990 130411 753000 E 152302 263230-1 135500 135312 330870 249951
LG LP090CED1 | Service Manual - Page 58
8.2 EXPLODED VIEW(ELECTRICAL HEATING) C 352115 552113 552112 147911 352116 552116 D 149400 359011 352390 152302-1 148000 349600-1 346810 435300 554030 435300-1 337000 135515 F W50400 354210 546810 349600 559011 263230-2 549990 552206 130411 753000 E 152302 263230-1 135500
LG LP090CED1 | Service Manual - Page 59
P/No.: 3828A20308K February, 2007 Printed in Korea