LG ARUN Series Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Air Conditioner
  5. ARUN Series
  6. Service manual
LG ARUN Series Service Manual

LG ARUN Series Service Manual

Outdoor unit multi v plus ii system
Hide thumbs Also See for ARUN Series:
Table of Contents

Advertisement

Quick Links

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.

Advertisement

Table of Contents
loading

Related Manuals for LG ARUN Series

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...

This manual is also suitable for:

Arun076dt2Arun096dt2Arun115dt2Arun134dt2Arun154dt2Arun173dt2 ... Show all

Table of Contents