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LG ARUN Series Service Manual
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LG ARUN Series Service Manual

LG ARUN Series Service Manual

Outdoor unit multi v plus ii system
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See also: Installation Manual
Internal Use Only
http://biz.lgservice.com
System
Outdoor Unit
R410A
SERVICE MANUAL R410A
MODEL : ARUN Series
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.

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Summary of Contents for LG ARUN Series

  • Page 1 Internal Use Only http://biz.lgservice.com System Outdoor Unit R410A SERVICE MANUAL R410A MODEL : ARUN Series CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

  • Page 2: Table Of Contents

    Part 2 Outdoor Units ........................ Part 3 PCB Setting and Test Run ..................Part 4 Trouble shooting guide ..................... - 2 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Safety Precautions

    • There is risk of fire or electric shock. • Improper wiring or installation may cause fire or electric shock. - 3 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 4 LGE are used, fire or explosion may result. R410A R407C - 4 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 • There is risk of fire, electric shock, or product • There is risk of fire, electric shock, explosion, or damage. injury. - 5 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 6 • To avoid vibration or water leakage. • If the gas leaks and accumulates around the unit, an explosion may result. 90˚ - 6 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 • It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation. - 7 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 Also support the outdoor unit at four points so that it cannot slip sideways. - 8 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 • Be careful and avoid personal injury. • There are sharp and moving parts that could cause personal injury. - 9 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 2.2 Outdoor Unit ............13 3. Combination of Outdoor Units ........15 4. Nomenclature..............17 4.1 Indoor Unit .............17 4.2 Outdoor Unit ............17 - 10 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 11: Model Names

    ❈ *ART COOL- B: Blue, M:Metal, D:Wood, R:Mirror, W:White Wood, V:Silver, E:Red, G:Gold, 1: Kiss (Photo changeable) *Wall Mounted- A: Basic, L:Plasma, *Ceiling Cassette- A: Basic, C:Plasma - 11 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: Outdoor Unit

    28HP 30HP 32HP Power Supply 20.5ton 22.5ton 24.0ton 25.5ton 3Ø, 460V, 60Hz 250DT2 270DT2 290DT2 310DT2 Heat Pump ARUN - 12 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: External Appearance

    ARNU123VEA2 ARNU073CEU2 ARNU093CEU2 ARNU123CEU2 ARNU153CEU2 Ceiling Suspended ARNU183CFU2 ARNU183VJA2 ARNU243CFU2 ARNU243VJA2 These are model names of the basic function. - 13 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 14: External Appearance

    External Appearance 2.2 Outdoor Units(460V) ARUN076DT2 ARUN096DT2 ARUN115DT2 ARUN134DT2 ARUN154DT2 ARUN173DT2 ARUN192DT2 ARUN211DT2 ARUN230DT2 ARUN250DT2 ARUN270DT2 ARUN290DT2 ARUN310DT2 - 14 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Combination Of Outdoor Units

    External Appearance 2.2 Outdoor Units(208/230V) ARUN076BT2 ARUN096BT2 ARUN115BT2 ARUN154BT2 ARUN173BT2 ARUN192BT2 ARUN211BT2 ARUN230BT2 - 15 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Combination Of Outdoor Units

    I A maximum of 32HP can be obtained by combining 8, 10, 12, 14 and 16HP 3.2 208/230V Module System Number of Units Capacity 60Hz 8HP(6.5ton) 10HP(8.0ton) 12HP(9.5ton) 16HP(12.5ton) 18HP(14.5ton) 20HP(16.0ton) 22HP(17.5ton) 24HP(19.0ton) - 16 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 17: Nomenclature

    N: Inverter and H/P V: Inverter and C/O B: Inverter and Heat Recovery System with Outdoor Unit using R410A - 17 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 - 18 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Outdoor Units Information

    Part 2 Outdoor Units - 19 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 20: Replacement Procedure For Compressor

    ARUN Series • Function ..................21 • Replacement procedure for Compressor ........57 - 20 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 4.9 Auto Back Up Function_constant speed compressor ..........44 4.10 Night Low Noise Function ..................45 4.11 Vacuum Mode ......................47 4.13 Black Box Function ....................48 - 21 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 22: Basic Control

    Compressor Stop(0Hz) Inverter Comperssor Cooling and heating load Fuzzy Control Inverter linear control as cooling and heating load increasing - 22 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 23: Master And Slave Unit's Eev Control

    800 pls) and discharge temperature is above 85°C(185°F) in heating operation, subcooling EEV may con- trol the "subcooling out temperature-evaporating temperature" to be some given difference. - 23 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 24: Special Control

    I Oil return operation time : 3 min for running step I Starting condition:every 6 hours operate I Oil return process ends if compressor protection control starts - 24 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 I Oil return operation time : 3 min for running step I Starting condition:same as cooling mode I Oil return process ends if compressor protection control starts - 25 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 26: Defrost Control

    2) The running time of defrost operation is over 30% of the total heating time 3) If compressor protection control starts by high discharge temperature of compressor etc. - 26 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 27: Oil Equalizing Control

    (Before 15 min. : Min. pulse) 4way valve After 60 min. After 15 min. Hot gas bypass valve (Before 15 Min. : ON) - 27 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 28: Protection Control

    > 307 kPa (44.5 psi) ❈ Frequency holding : frequency (or RPM) is not increasing ( can decrease ) - 28 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 29: Discharge Temperature Control

    30A or more ❈ AC input current is inverter input current except constant speed compressor current(Noise filter passed current) - 29 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 30: Cooling Mode

    - The state of pressure sensing switch is normally on. It has small electric current from 220V AC. Never touch the connecting terminal with hand nor short two wires directly. - 30 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 31: Other Control

    Heat pump : Display 2 is default value Cooling only : no display Factory setting(25 is normal) Refrigerant display - 31 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 Every indoor unit displays its address on wired remote controller and the 7 segment of main PCB is off. - 32 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 33: Instant Indoor Unit Checking Mode

    Emergency operation with inverter compressor failure should not last 48 hours. ➔ It causes other compressor failure. During the emergency operation, cooling/heating capacity may be lower. - 33 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 34: Sensor Checking Function

    Checking Auto Charging SW01V Press the black button for 2 sec. after turning off all of SIP switch. Completed. - 34 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 In case 5 number of errors occurs, again perform sensor checking after solving errors. 2. IDU in which error occurred operates air circulation mode. - 35 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 36: Refrigerant Auto Charging

    Press the black button SW01V Press the black button for 2 sec. after turning off all of dip S/W. Completed. - 36 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 3. Set the IDU wired remote controller temperature sensing mode as IDU 4. Be careful that IDU should not be thermo off. - 37 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 38: Refrigerant Checking Function

    Press the black button on main PCB SW01V Press the black button for 2 sec. after turning off all of dip S/W. Completed - 38 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 Charge the refrigerant by using Refrigerant Auto Charging Function. 4. Impossible to Judge(639) IF the system is not in order, check the other problem except refrigerant. - 39 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 40: Pump Down

    3. Maximum operation time of pump down function is 30 min. (in case low pressure doesn't go down) 4. Press black+red button during operation to end pump down.(IDU,ODU off) - 40 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 41: Pump Out

    Make certain that IDU doesn't run with thermo off mode during operation (in case low pressure doesn't go down) 4. Press black+red button during operation to end pump out.(IDU,ODU off) - 41 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 42 6. Eliminate refrigerant in common pipe after opening the common pipe of corresponding ODU. Replace compressor and perform vacuum. 7. Add the refrigerant with auto charging function - 42 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 43: Auto Back Up Function_Inverter Compressor

    3. If Inverter Comp Auto Back up starts, error displays for 10 min. every 6 hours. 4. Error displays continuously at the corresponding ODU. - 43 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 44: Auto Back Up Function_Constant Speed Compressor

    Operation possible Example) Slave1 Unit constant speed Comp failure(No.173) Error number Caution 1. Request SVC immediately if error occurs - 44 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 45: Night Low Noise Function

    2. In case the function is not used, set the dip S/W OFF and reset the power. 3. If ODU RPM changes, cooling capacity may go down. [Note] 1. Select appropriate RPM referencing noise table. - 45 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 46 Timer(B)=0 Timer(C) ≥ 9hr Step = 1 RPM_max=510 Step = 2 RPM_max=450 Step = 3 RPM_max=400 Timer(C)= 0 Error - 46 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 47: Vacuum Mode

    Low static pressure:No.12 Power Reset Power Reset Static pressure compensation mode is cancelled Static pressure compensation mode is set - 47 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 48: Black Box Function

    <Save EEP data> in LGMV I Saving process : Making Data ➠ Save EEP data ➠ data saving place select ➠ file save - 48 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 49: Part 3 Pcb Setting And Test Run

    Part 3 PCB Setting and Test Run - 49 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 50: Test Run

    • In case that the outdoor temperature is low, be sure to supply power 6 hours before operation so that the heater is heated(insufficient heating may cause damage of the compressor.) - 50 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 51: Troubleshooting

    • When CH05/53/11 ERROR occurs, check if auto-addressing has done and communication wiring is ok. - 51 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 52: Dip Switch Setting

    3.1 Location of setting Switch Main PCB SW01B SW02B (DIP S/W) (DIP S/W) 7 - Segment SW02V Auto addressing - 52 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 Product may not properly operate if the relevant DIP switch is not properly setup. Model Code 3Ø 208/230V 3Ø 460V Model Code Unit (HP) Model Code Unit (HP) - 53 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 54 Forced Operation ( Heating ) ( Heating ) 9 10 11 12 13 14 9 10 11 12 13 14 - 54 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 55 9 10 11 12 13 14 Vacuum Mode Vacuum Mode 9 10 11 12 13 14 9 10 11 12 13 14 - 55 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 56 9 10 11 12 13 14 Pump Out Pump Out 9 10 11 12 13 14 9 10 11 12 13 14 - 56 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 57: Replacement Procedure

    Replacement procedure for Compressor 1. Replacement procedure for Compressor.........58 1.1 Replacement procedure............58 - 57 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 58 13) Charge refrigerant after the completion of vacuum drying, and check the function of compressor with cooling or heating operation. - 58 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 59: Part 4 Trouble Shooting Guide

    Part 4 Trouble shooting guide - 59 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 60 2.5 Inverter IPM Checking Method ..............68 2.6 Fan IPM Checking Method ...............69 2.7 UW1 chassis 2Fan ..................69 2.8 Other ......................71 3. Self-diagnosis function ..............72 - 60 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 61: The Phenomena From Main Component Failure

    • When CH05/53/11 ERROR occurs, check if auto-addressing has done and communication wiring is ok. - 61 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 62: Checking Method For Key Components

    (when measuring absolute values). Accurate measuring values cannot be obtained with a gen- eral movable tester (For analog and digital mode). - 62 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 63: Fan Motor

    3. If problems continue to occur even after counter- measure of No.1 and No.2, it means that both boards has defect. - 63 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 64: Electronic Expansion Valve

    Full open EEV noise. open 1350 pulses - If liquid refrigerant is in EEV, the noise is lower. pulse - 64 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 65 When the coil part is removed or assembled, be careful not to bend the pipe of the body. A part - 65 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 66 If estimated temperature is very low in comparison with suction temperature which is displayed at remote controller then the valve is not fully closed - 66 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 67: Phase Bridge Diode Checking Method

    DC voltage is discharged. Otherwise, there is chance of getting electric shock. • There is chance of electric shock by charged voltage. - 67 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 68: Inverter Ipm Checking Method

    28K Ω ± 10% W terminal : black(-) Open ✽ Red(+) and black(-) are the measuring terminals of multi tester. - 68 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 69: Fan Ipm Checking Method

    U terminal V terminal W terminal U,V,W connector U,V,W connector N terminal N terminal P terminal P terminal DC connector - 69 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 70: Other

    LED 01Y turned off (wait 3 minutes after main power OFF), otherwise it may cause electrical shock. - 70 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 71: Error Display

    Switch System is turned off by Slave outdoor unit high pressure Slave Outdoor Unit High Pressure switch. Switch - 71 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 72: Self-Diagnosis Function

    Transmission error : Inverter ➠ System is turned off by Slave 1 Outdoor unit PFC IPM Fault Signal Converter - 72 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 73 Sensor(B) Fault Slave Outdoor Unit Heat Slave Outdoor Unit Heat Exchanger Temperature Exchanger Temperature Sensor(B) Open or Short Sensor(B) Fault - 73 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 74 Master Outdoor Unit Fan CT Sensor Error Slave Outdoor Unit Fan CT Sensor open or short Slave Outdoor Unit Fan CT Sensor Error - 74 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 75 Instant Over Current at Slave Outdoor Unit Fan IPM 1 0 6 Slave Outdoor Unit FAN IPM Fault Error - 75 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 76 Slave Outdoor Unit Fan PCB Slave Outdoor Unit Fan PCB Heat Sink Temperature Heat Sink Temperature Sensor Sensor open or short Error - 76 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 77: Troubleshooting Guide

    CN-PIPE2 : Pipe outlet temp sensor CN-PIPE1 : Pipe inlet temp sensor Measure the resistance of outlet pipe temp sensor. - 77 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 78 ❇ The PCB can differ from model to model. Check from the right source. Checking communication cable connection status - 78 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 79 & the unit is stopped automatically. float (High position ➠➀ O p e I ) Condensate water - 79 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 80 Float switch connector Float switch Housing (CN-FLOAT) [***] Standard of drain pipe head height / slope MAX 450 700mm(27.6 inch) - 80 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 81 (-9V~+9V) then of communication terminal between IDU and ODU communication from outdoor unit is normal - 81 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 82 With cableless remote controller: Turn off indoor unit, and then turn on by changing the operation mode. The error will disappear. - 82 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 83 - Replace the indoor unit PCB, and then make sure to perform Auto addressing and input the address of central control - 83 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 84 (Notice: The connection of motor connector to PCB should be done under no power supplying to PCB) - 84 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 85 After ODU main PCB After Auto addressing, Replace indoor unit 485 reset, error code error code disappears? communication PCB disappears? - 85 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 86 Check inverter PCB assembly IPM normality. Is inverter PCB assembly ¡ Replace inverter PCB assembly if abnormality found. normal? Recheck power and installation condition - 86 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 87 * Heat sink cooling fan * Measuring insulation resistance between Comp output terminal and chassis * IPM joining point Check joining conditon - 87 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 88 Check inverter PCB assembly IPM normality Is inverter PCB assembly ¡ Replace inverter PCB assembly normal? Recheck power and installation condition - 88 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 89 * Inverter PCB & bridge diode wiring(3Ø 460V) each terminal of compressor * Compressor wire connector connection Check joining condition * Measuring input voltage - 89 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 90 Check inverter PCB assembly IPM normality Is inverter PCB assembly normal? ¡ Replace inverter PCB assembly Recheck power and installation condition - 90 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 91 Troubleshooting Guide * Inverter PCB & bridge diode wiring(3Ø 460V) * Measuring input voltage - 91 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 92 Replace inverter PCB assembly Recheck power and installation condition * Measuring input voltage * Inverter PCB assembly power wiring - 92 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 93 Check inverter PCB assembly IPM normality Is inverter PCB assembly normal? ¡ Replace inverter PCB assembly Recheck power and installation condition - 93 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 94 Troubleshooting Guide * Measuring resistance between each terminal of compressor * Compressor wire connection - 94 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 95 Recheck Power and Installation Reactor Wire connector Cooling Fan connector Cooling Fan IPM joing point Check joining condition - 95 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 96 Recheck power and installation condition * Measuring input voltage * Noise filter wiring Noise filter output(lower part) Noise filter input (upper part) - 96 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 97 Check inverter PCB assembly IPM normality Is inverter PCB assembly normal? ¡ Replace inverter PCB assembly Recheck power and installation condition - 97 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 98 Troubleshooting Guide * Measuring resistance between each * Compressor wire connection terminal of compressor * Measuring input voltage - 98 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 99 Check another components Is there pipe and operation conditions (strainer etc.) clogging? / Take measures Replace strainer - 99 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 100 Replace sensor of high pressure value(Is it high actually)? Check indoor unit LEV Check indoor unit PCB Check in/outdoor installation condition - 100 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 101 (Notice: it is not full ice forming of strainer, in case that there is installation conditions not at inlet portion but at outlet portion) - 101 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 102 Is inverter PCB assembly normal? Recheck power and installation condition * Measuring input voltage * LGMV Part * Inverter PCB assembly - 102 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 103 10°C(50°F) = 362kΩ, 25°C(76°F)= 200kΩ, 50°C(122°F)= 82kΩ, 100°C(212°C)= 18.5kΩ Check the resistance Check the resistance inverter compressor of constant compressor discharge temperature discharge temperature sensor sensor - 103 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 104 After replacement of Replace corresponding outdoor unit main PCB pressure sensor is the system normal? Low pressure sensor High pressure sensor - 104 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 105 Exchanger in master Refer to CH45 Master 481 sensor (Open/Short) & slave outdoor unit Slave 482 heat exchanger (B) - 105 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 106 Is main PCB assembly normal? Recheck power and installation condition * Measuring input voltage * Noise filter wiring * Main PCB power connection - 106 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 107 * In order to check communication cables between outdoor units, check in order as below ➠ : PCB connectors ➠ terminal block communication cables - 107 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 108 * The method of checking MAIN PCB and inverter compressor PCB (If normal, communication LED blinks) Communication connector & LED in MAIN PCB Communication connector & LED in inverter compressor PCB - 108 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 109 In case that only communication PCB is replaced above process is not needed - 109 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 110 Is CH 54 occurred again after reset MAIN circuit breaker? Replace Fuse Is main PCB fuse normal? Replace main PCB - 110 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 111 * Right inserting direction of inverter EEPROM ❊ Note : Replace after power off ❊ Note : Replace after power off - 111 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 112 Recheck power and installation condition * Fan Motor resistance measuring * Hall Sensor connector * Fan Motor Wire connection between each phase - 112 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 113 Check constant speed compressor CT Sensor connection condition CT Sensor wiring condition and locking normal? Recheck power and installation condition - 113 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 114 Replace inverter PCB assembly Is inverter PCB assembly normal? Recheck power and installation condition * Measuring input voltage - 114 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 115 Is inverter PCB assembly Check inverter PCB assembly IPM normality normal? ¡ Replace inverter PCB assembly Recheck power and installation condition - 115 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 116 Inverter PCB assembly/Wiring power to inverter PCB on Noise filter Inverter PCB assembly power Noise filter power connection connection - 116 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 117 Recheck power and installing condition Measuring input voltage Inverter PCB & Bridge Diode wiring Checking joining condition - 117 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 118 Reassemble or manage if abnormality found Is Fan PCB assembly normal? Replace Fan PCB assembly Recheck power and installation condition - 118 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 119 Recheck power and installation condition Measuring input voltage Noise filter wiring Noise filter output(lower part) Noise filter input (upper part) - 119 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 120 ¡ Replace Fan PCB assembly Recheck power and installation condition Measuring fan motor phase Hall Sensor connection resistance Fan motor wire connection - 120 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 121 ❈ Note : If LED is blinking oppositely after connecting Hall Sensor connector, U.V.W output terminal oppositely, replace the motor. If LED is not blinking oppositely,replace fan PCB assembly. - 121 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 122 Measuring insulation resistance Fan wire wiring resistance between fan terminal & chassis Fan motor wire connection Hall Sensor connection - 122 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 123 Reset after checking EEPROM assemble condition condition normal? Replace EEPROM with 24C16 Is EEPROM 24C16? Recheck power and installation condition - 123 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 124 Inverter EEPROM insertion direction Same direction both socket hole and EEPROM hole ❈ Note : Replace after power off - 124 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 125 Connect power cable supplied? Replace main PCB * Slave Unit Dip SW Slave 9 10 11 12 13 14 - 125 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 126 Error LED Communication connector Communication LED ❈ Note : Check fan PCB assembly Error LED blinking (Check 108π¯ Error) - 126 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 127 Fan Motor Wire connection Fan IPM assemble position Check assemble condition Hall Sensor connection Fan Heatsink assemble position Check assemble condition - 127 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 128 Is Fan PCB assembly normal? Replace fan PCB assembly Recheck power and installation condition DC voltage connection DC Volt connected - 128 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 129 Air temperature sensor: 10°C(50°F) = 20.7 kΩ, 25°C(76°F) = 10 kΩ, 50°C(122°F) = 3.4 kΩ Pipe temperature sensor: 10°C(50°F) = 10 kΩ, 25°C(76°F) = 5 kΩ, 50°C(122°F) = 1.8 kΩ - 129 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 130 If the same error is occurred in mode, is the same error near future replace 4way valve occurred again? Replace 4 way valve***** - 130 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 131 ➃ If there is a unit in which the difference is not increased then the 4way valve of that unit is defective - 131 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 132 [refer electric component part] * cables connection between constant compressor and magnetic switch Replace outdoor unit PCB - 132 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 133 ➔ Replace the sensor if abnormality found ’ Replace fan PCB assembly Is fan PCB assembly normal? Recheck power and installation condition - 133 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 134 MAY, 2008 P/NO : MFL50459503...

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