LG LS090CP(AS-C0914DH0) Svc Manual

Lg room air conditioner svc manual(exploded view)

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LG Room Air Conditioner

SVC MANUAL(Exploded View)

MODELS : LS090CP(AS-C0914DH0)

LS120CP(AS-C121E1H0)

LS180CP(AS-C1835DM0)

LS240CP(AS-C2435DM0)

LS090HP(AS-H091E1H0)

LS120HP(AS-H121E1H0)

LS180HP(AS-H1835DM0)

LS240HP(AS-H2435DM0)

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual.

Only for authorized service personnel.

Internal Use Only

http://biz.lgservice.com

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Summary of Contents for LG LS090CP(AS-C0914DH0)

Page 1 LG Room Air Conditioner SVC MANUAL(Exploded View) MODELS : LS090CP(AS-C0914DH0) LS120CP(AS-C121E1H0) LS180CP(AS-C1835DM0) LS240CP(AS-C2435DM0) LS090HP(AS-H091E1H0) LS120HP(AS-H121E1H0) LS180HP(AS-H1835DM0) LS240HP(AS-H2435DM0) CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel. Internal Use Only http://biz.lgservice.com...
Page 2: Table Of Contents
Schematic Diagram...62 Electric Control Device ...62 Wiring Diagram...65 Components Location ...67 Product Specifications ...72 Exploded View...74 Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Air Conditioner Service Manual - 2 - LGE Internal Use Only...
Page 3: Safety Precautions
Install the panel and the cover of control box securely. • There is risk of fire or electric shock. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Be sure not to do. Be sure to follow the instruction.
Page 4 Use a dedicated outlet for this appliance. • There is risk of fire or electric shock. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes For installation, always contact the dealer or an Authorized Service Center.
Page 5 • There is risk of property damage, failure of product, or electric shock. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Do not let the air conditioner run for a long time when the humidi- ty is very high and a door or a window is left open.
Page 6 Install the drain hose to ensure that water is drained away prop- erly. • A bad connection may cause water leakage. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Unplug the appliance before performing cleaning or mainte- nance.
Page 7 They are very sharp! • There is risk of personal injury. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Do not install the product where it will be exposed to sea wind (salt spray) directly.
Page 8 Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire. • They may burn or explode. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Use a firm stool or ladder when cleaning or maintaining the air conditioner.
Page 9: Dimensions
NOTICE This symbol indicates special notes. Indoor Unit Model Dimension mm(inch) mm(inch) mm(inch) Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes 9 Btu Series 9 Btu Series (C/O) (H/P) 840(33.1) 894(35.2) 270(10.6) 295(11.6)
Page 10 Dimensions Model Dimension mm(inch) mm(inch) mm(inch) Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes 18 Btu Series 1090(42.9) 300(11.8) 178(7.0) - 10 - Installation plate 24 Btu Series 1090(42.9) 300(11.8) 178(7.0) LGE Internal Use Only...
Page 11: Outdoor Unit
1. 9k, 12k MODEL unit mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) mm(inch) Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes 9k, 12k 770(30.3) 540(21.3) 245(9.6) 287(11.3) 64(2.5) 518(20.4) 10(0.4) 100(3.9) - 11 -...
Page 12 Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes 18k, 24k 870(34.3) 655(25.8) 320(12.6) 370(14.6) 25(1.0) 630(24.8) 25(1.0) 546(21.5) 162(6.4) 162(6.4) 54(2.1) 74.5(2.9)
Page 13 This symbol indicates special notes. Features Air Inlet Air Filter Air Intake Vents Air Outlet Vents Base Plate Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Front Panel Signal Receptor Air Intake Vents Connecting Wires Piping Drain Hose...
Page 14: Installation
Type "B" screw Installation Tools Figure Measuring Tape, Knife Hole Core Drill Torque wrench Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Type "A" screw and plastic anchor Name Figure Screw driver Electric Drill...
Page 15 Operation Indication Lamps/ Air Inlet Vents Air Outlet Vents NOTE: refrigerant line wall thickness must be at least 0.8 mm (0.031 inch) Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Signal Receptor Forced Operation Button...
Page 16 Do not handle the pipe by yourself (customer) High-pressure refrigerant may cause personal injury. - manifold gauge ,charging and any piping tools must be dedicated to R-410A systems. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Vapor pressure(25°C)(kg f/cnf)
Page 17: Selection Of The Best Location
If the outdoor unit is installed on roof structures or walls, this may result in excessive noise and vibra- tion, and may be also classed as non serviceable installation. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes 6.
Page 18: Piping Length And Elevation
• Capacity is based on standard length and maximum allowance length is on the basis of reliability. • Oil trap should be installed every 5~7meters (16.4~23.0ft). Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Standard Max.
Page 19: How To Fix Installation Plate
• Drill the piping hole with a ø70mm(2.76in) hole core drill. Drill the piping hole at either the right or the left with the hole slightly slanted to the out- door side. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Chassis Hook Ø70mm...
Page 20: Flaring Work And Connection Of Piping
• Carry out flaring work using flaring tool as shown below. Outside diameter inch Ø6.35 0~0.5 Ø9.52 0~0.5 Ø12.7 0~0.5 Ø15.88 0~1.0 Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes inch 0~0.020 0~0.020 0~0.020 0~0.039 - 20 - Copper pipe Slanted Uneven Rough...
Page 21: Connection Of Piping Indoor
Ensure that the hooks are properly seated on the installation plate by moving it left and right. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Indoor unit Installation plate...
Page 22 Drain pipe Indoor unit drain hose Vinyl tape(narrow) Adhesive Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Wrap the insulation material around the connecting portion. • Overlap the connection pipe insulation material and the indoor unit pipe insulation material.
Page 23 Indoor unit tubing Flare nut Pipings • Tighten the flare nut with a wrench. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Torque wrench Indoor unit tubing Ø6.35 Ø9.52...
Page 24 Pipe Drain hose Vinyl tape(narrow) Wrap with vinyl tape(wide) Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Reroute the pipings and the drain hose across the back of the chassis. Indoor unit piping...
Page 25 • Press on the upper side of clamp and unfold the tubing to downward slowly. Incorrect case • Following bending type from right to left may cause damage to the tubing. - 25 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 26: Connection Of The Pipes-Outdoor
Outside diameter inch Ø6.35 Ø9.52 Ø12.7 Ø15.88 Ø19.05 Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Outdoor unit Torque - 26 - Suction Line piping (Bigger diameter) Evaporator Line...
Page 27: Connecting The Cable Between Indoor Unit And Outdoor Unit
AWG(MIN.) Model Power source 1ø, 115V 1ø, 115V 1ø, 230/208V 14 1ø, 230/208V 12 Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Wiring Diagram Indoor Unit Terminal L1 is neutral for 115V models. NOTICE 2.
Page 28 After the confirmation of the above conditions, prepare the wiring as follows: 1) Never fail to have an individual power circuit specifically for the air conditioner. As for the method of wiring, be guided by the circuit diagram posted on the inside of control cover.
Page 29: Checking The Drainage And Forming The Pipings
• The drain hose should point downward for easy drain flow. Downward slope • Avoid these situations. Do not raise Water Water leakage leakage Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes drain hose Drain hose Accumulated drain water Tip of drain hose...
Page 30: Form The Piping
Trap is required to prevent water from entering into electrical parts. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes In cases where the Outdoor unit is installed above the Indoor unit perform the following.
Page 31: Air Purging
Usually, the cylinder is used in a vertical standing position. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes • Do a leak test of all joints of the tubing(both indoor and outdoor) and both gas and liquid side service valves.
Page 32: Finishing The Job
This completes air purging with a vacuum pump. The air conditioner is now ready to test run. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes 3-way valve...
Page 33 If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using the unit nameplate charge adjusting for line sets longer or shorter than 7.5m(25ft). Confirm the refrigerant R-410A. Use manifold gauge and hose for R-410A. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Max.
Page 34: Test Running
Operate unit for 15~20 minutes, then check the system refrigerant charge: 1. Measure the pressure of the gas side service valve. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes 2. Measure the temperature of the intake and discharge of air.
Page 35: Operation
26°C Intake Air Temp 24°C Intake Air Temp<26°C 18°C Intake Air Temp<24°C Intake Air Temp<18°C Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Setting Temp+0.5°C Setting Temp-0.5°C 25°C Intake Air Temp-1°C Intake Air Temp-0.5°C 18°C...
Page 36 • While in defrost control, the compressor is on and the indoor fan, the outdoor fan, and the 4 way valve are off. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Setting Temp+0.5°C Setting Temp-0.5°C...
Page 37 • When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then operated in order that the air outflow could reach further. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 38 • When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds. • When the appliance-pause key is input by the remote control, the long "beep—" sounds. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Heat pump Model Room Temp.
Page 39: Display Function
Error Display LED Code (Indoor body operation LED) (once) 3sec 3sec Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes 2. Cooling Model Operation Indicator • Cooling, Soft Dry, Fan Compressor on Indicator Error contents •...
Page 40: Remote Control Operations
Auto Operation or Auto Changeover Healthy Dehumidification Operation Heating Operation • Cooling Model( ), Heat Pump Model( Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes 1. START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again.
Page 41: Disassembly
(slightly tilted) and lift it straight upward. 1. Before removing the control box, be sure to take out the wire screwed at the other end. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Earth Conductor...
Page 42 • Remove 3 screws securing the evaporator(at the left 2EA in the Eva Holder, at the right 1EA). • When repair, do not damage the Caution label. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Screw...
Page 43 • Remove the left end of the cross-flow fan from the self-aligning bearing. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Motor cover Bearing...
Page 44: Troubleshooting Guide
HEAT EXCHANGE (EVAPORATOR) (2) Cooling & Heating Models INDOOR UNIT HEAT EXCHANGE (EVAPORATOR) Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes OUTDOOR UNIT LIQUID SIDE CAPILLARY TUBE GAS SIDE COMPRESSOR OUTDOOR UNIT CHECK VALVE...
Page 45: 2-Way, 3-Way Valve
(Servicing) Gas charging (Servicing) Pressure check (Servicing) Gas releasing (Servicing) Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes 2-way Valve (Liquid Side) Hexagonal wrench (4mm) Open position Closed position To outdoor unit Shaft position...
Page 46: Pumping Down
– Open the low-pressure valve on the charge set slightly to air purge from the charge hose. (5) Set the 2-way valve to the closed position. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Liquid side Open...
Page 47 (2) Connect the charge set to the 3-way valve’s port. – Leave the valve on the charge set closed. – Connect the charge hose to the service port. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Liquid side 3-Way valve...
Page 48 (2) Evacuation for approximately one hour. – Confirm that the gauge needle has moved toward -76 cmHg (vacuum of 4 mmHg or less). Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Liquid side 3-Way...
Page 50 Operating Suction Pressure (For R410A) (According to Indoor & Outdoor Temperature) P = 3 + 0.0123 x T Where, P Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes (At operating the Unit for 10 minutes) Indoor Temp. (˚C) + 0.8 x T...
Page 51: Cycle Parts
1. The suction pressure is usually 8.5~9.5 kg/cm 2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes : less than 80% of...
Page 52: Electronic Parts
• IC02D(7805) Output (Indoor unit) IC03D(7805) Output (Outdoor unit) • IC01A(KIA7036, Reset IC) OSC01B(4MHz) (Indoor/Outdoor unit) Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Turn off Main Power (After 20 seconds) Turn on Main Power Primarily, the operating condition of Micom is OK.
Page 53 • IC02D(7805) Output (Indoor unit) IC04D(7805) Output (Outdoor unit) • IC01A(KIA7036, Reset IC) OSC01B(4MHz) (Indoor/Outdoor unit) Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Turn off Main Power (After 20 seconds) Turn on Main Power Primarily, the operating condition of Micom is OK.
Page 54: The Product Is Not Operate With The Remote Controller
Check the connecting circuit between the remote controller MICOM (No. ) - R17(2 ) - IR LED - Q1 - R16(2.2K ). Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Turn on Main Power Caused by other parts except the remote controller Check the contact of CN-DISP connector.
Page 55 • Check the electrical wiring diagram of outdoor side. • Check the abnormal condition for the component of Compressor/Outdoor Fan Motor. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Turn on Main Power )" by setting the desired temperature of the...
Page 56 • Check the electrical wiring diagram of outdoor side. • Check the abnormal condition for the component of Compressor/Outdoor Fan Motor. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Turn on Main Power )" by setting the desired temperature of the...
Page 57: When Indoor Fan Does Not Operate
Indoor Fan is to be stopped when Indoor pipe(coil) termperature is lower than 79°F. (At that times, Defrost indicator is turned on) Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Check connecting condition of the CN-MOTOR CON- NECTOR Check the interference of Indoor Fan.
Page 58: When Vertical Louver Does Not Operate
- Between - Between • Confirm the assembly conditions that are catching and interfering parts in the rotation radial of the Vertical Louver Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes of MICOM of IC01M...
Page 59: When A Comunication Error Occurs
If the connecting wires of Indoor and Outdoor unit are not connected within 2 minutes after the power of Outdoor unit is applied, a communication error will occur. Therefore, the power should be applied after connect- ing them. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes - 59 -...
Page 60 Short between terminals CN-DISP CN-TH Short between terminals Short between terminals Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes • The same as the phenomenon of Outdoor Unit. • The indoor fan does not operate. Open •...
Page 61 Brown Connecting error Connecting error Connecting error Connecting error Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes • All functions stop. • The operation with the remote controller, forced and OPEN test one do not operate.
Page 62: Schematic Diagram
Schematic Diagram Schematic Diagram Electric Control Device Indoor - 62 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 65: Wiring Diagram
Schematic Diagram Wiring Diagram Indoor Unit Models: 9k, 12k, 18k, 24k - 65 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 66 Schematic Diagram Outdoor Unit Models: 9k(C/O) Models: 12k(H/P), 12k(C/O, H/P) - 66 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 67 Schematic Diagram Models: 18k(C/O) Models: 18k(H/P), 24k(C/O, H/P) - 67 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 68: Components Location
Schematic Diagram Components Location Indoor MAIN P.W.B ASSEMBLY • TOP VIEW • BOTTOM VIEW - 68 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 71 – 6871A20681 CN-DISP1 PCB P/No : 6870A90240F PLASMA LED_M RECEIVER C01A SW_TACT PCB ASSEMBLY P/No : 6871A20681 – 6871A20680 - 71 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 72: Product Specifications
Indoor Outdoor Gross Weight Indoor Outdoor * Design and specifications subject to change without prior notice for product improvement. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Model Name LS090CP (AS-C0914DH0) (AS-C121E1H0) 1, 115V, 60 Ø, V, Hz...
Page 73 Indoor Outdoor Gross Weight Indoor Outdoor * Design and Specifications subject to change without prior notice for product improvement. Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Unit LS090HP LS120HP (AS-H091E1H0) (AS-H121E1H0) (AS-H1835DM0) (AS-H2435DM0) ø, V, Hz...
Page 74: Exploded View
Exploded View Indoor Unit 135316 135313 Part for Plasma Models 159830 135311 354210 147581 268711A 267110 Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes Option Parts 152313 152302 342800 359011 352115 35211B 352116 352150 146811...
Page 78 Exploded View Outdoor Unit: 24k(C/O) Seriess 435512 349480 435301 546810 559010 447910 430410 Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes 437210 554031 349600 W0CZZA W0CZZB 552203A 554160A 552203B 550140 - 78 - 263230B...
Page 79 Outdoor Unit: 18k, 24k (H/P) Seriess 435512 349480 435301 546810 559010 447910 430410 Copyright ©2007 LG Electronics. Inc. All right reserved. Only for training and service purposes 437210 554031 349600 W0CZZA W0CZZB 552203A 554160A 552203B 550140 - 79 - Exploded View...
Page 80 December, 2007 P/NO : MFL32351801...

LG LS090CP(AS-C0914DH0) Svc Manual

Safety Precautions

Dimensions

Installation

Flaring Work and Connection of Piping

Connecting the Cable between Indoor Unit and Outdoor Unit

Checking the Drainage and Forming the Pipings

Air Purging

Test Running

Operation

Disassembly

Troubleshooting Guide

Schematic Diagram

Product Specifications

Exploded View

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