Home
1 - Ventia
Contents
1. ccccccsssecceeceeseeeeeeaeeeeeeesaaeseeess 35 4 Oil return control Lue 36 5 Defrost control rrrnnnnnnnnrannrnnnnnevnnnvnnnrnnvnnennnnvnnnnnnvnnevnnnvnsnnnevnnnvnnevnrvnnenunnvnenvnevnnennen 36 6 Protection control area 37 Part4 TETRA 9 E Oe ene eT eee re 38 1 Check before Test Run ccc ccccecce cece ceceeeeeeeeneeeeeeeeaeeeaeeeteeeseeeeaeeeneseseeeneeenes 39 2 Test Run Flow chart 2 40 JET RUNDO eee E E 41 Part5 Trouble Shooting Guide rrrranrnnoonononnnnnnnnnnn ann nnnnnnnnnnnnnnnnnnnnnnnnnnnnrnrnnnrrnnnnnrnnnnennnnnsee 44 1 Self diagnosis Function er 45 2 PUND DOWD rs 47 3 A 2 U2 gt 110 ee e aaa eee ee ee A E E ERE ee eee es 49 4 Gas Tai 50 S CVCE P e e E E E ee ee eee ee 51 6 Electronic Parts arrrnunnnnunnnnnnnvnnnnnnnnvnnnnnnnnvnnnnnnvnnnnnnnannnnnnnvnvnnnnnnvnnnenenannnnenevnvnnne 52 Part 6 Service Order rrrrnnnnnnnnnnnnnnnnnnnn anten nnnnnnntnranen raner vanen ranenrnnsnrnnenrnneeranenrnnenrunernnnennnnennnnen 140 1 PCB Service Order LLuuasesssesenessaenm eee rdiesieeneden 141 Copyright 02012 LG Electronics Inc All right reserved 1 Only for training and service purposes LGE Internal Use Only Part 1 General Information 1 Safety Precautions cscs eto peered wees cement eee 3 2 INOS MNO VU 6 SNOEN Parabel semcsasieinmeeoubereeeaies 10 Copyright 02012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use
2. EE RT A7UWA42LFAO A8UWA48LFAO A9UW56LFAO PeR FM41AH U32 FM49AH U32 FM54AH U32 No of connectable indoor units Max 7 Max 8 Max 9 Total capacity index of connectable kW 15 8 18 5 21 4 indoor units kBtu h 54 63 73 Power supply 30 380 415V 50Hz Chassis Copyright 02012 LG Electronics Inc All right reserved 8 Only for training and service purposes LGE Internal Use Only Part 1 General Information 2 3 BD Branch distributor units No of connectable indoor units Max 2 Max 3 Max 4 Model name PMBD3620 PMBD3630 PMBD3640 Connectable indoor unit capacity kW 1 5 7 0 1 5 7 0 1 5 7 0 kBtu h 5 24 5 24 5 24 BD unit Copyright 2012 LG Electronics Inc All right reserved 9 Only for training and service purposes LGE Internal Use Only Part 1 General Information 3 Nomenclature 3 1 Indoor Unit Global Serial number Function A Basic C L Plasma E Elevation grille Chassis naem Only Multi Look Common Indoor L Basic Indoor unit type Only Multi A ART COOL D ART COOL Mirror E Libero E R Libero R T Ceiling Cassette Chassis name Common Indoor Electrical rating G 10 220 240V 50Hz 60Hz L 30 380 415V 50 60Hz Cooling heating capacity Ex 7 000 Btu h Class gt 07 18 000 Btu h Class gt 18 Model type H Heat pump W DC Inverter heat pump Indicates that this is multi system indoor unit using R410A 3 2 Outdoor Unit Global
3. Is compressor Wire connection condition normal No Yes Is inverter PCB assembly No power connection normal Yes l No Is input voltage normal Yes Is inverter PCB assembly No normal Yes Recheck power and installation condition Copyright 2012 LG Electronics Inc All right reserved Only for training and service purposes 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure gt Reassemble or manage if abnormality found 1 Check resistance between each terminal of compressor 0 845 7 2 Check insulation resistance between compressor terminal and pipe over 50MQ gt Replace compressor if abnormality found 1 Check inverter PCB assembly U V W connector connection condition 2 Check wire disconnection and wiring 3 Check compressor terminal connection condition bad contact Reassemble if abnormality found Check connection between inverter PCB assembly and bridge diode misconnection disconnection gt Wiring again if abnormality found Check R S S T T R phase voltage is 380V 10 R N S N T N phase voltage is 220V 10 gt Check connection condition and wiring if power is abnormal Check inverter PCB assembly IPM normality gt Replace inverter PCB assembly 119 LGE Internal Use Only 5 Trouble Shooting Check Point 1 Check the po
4. Yes Recheck power and installation condition Copyright 2012 LG Electronics Inc All right reserved 121 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Check Point 1 Check the Tab1 connection condition Refer to outdoor wiring diagram 2 Check the CN_L1 R CN L2 S CN L3 T connection condition 3 Check the DC Link voltage at not operating 380V 4 Check the DC Link voltage at Comp operating 500V 5 Check DC Link Sensing Signal Refer the Picture gt 2008 01 02 ROT RO2T ROIT 27 330K 114 lt INPUT VOLTAGE Check Point gt Copyright 02012 LG Electronics Inc All right reserved 122 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting ed Cause of error Check point amp Normal condition Abnomal Input Voltage Input voltage R S T N 140Vac 300Vac Check the power source e Check the components E Error Diagnosis and Countermeasure Flow Chart R S S T T R phase voltage is 400V 10 Is input voltage normal R N S N T N phase voltage is 220V 10 Check connection condition and wiring if power is abnormal Is Inverter PCB Normal Replace inverter PCB assembly Recheck power and installation condition C02C 0 001u 2012 Hitt feels on aya en dt or mi ne er de RO2C p ii PESENE j en R i Input Volt PFC 7 5K 2012 RO3C NRO6C 2012 1M 1 2W ROIC RO3C 20K 20
5. CN L3M PFC IPM CN L1 R Cia E CTET Pe p ba dk INV IPM CN Comp U VW lt INV PCE gt lt PFC amp INV LED gt 1 Wait until inverter PCB DC voltage is discharged after main power off 2 Pull out CN L1 R CN L2 S CN L3 T and CN COMP Connector 3 Set multi tester to resistance mode 4 If the value between P and N terminal of IPM is short 0Q or open hundreds MQ PCB needs to be replaced IPM damaged 5 Set the multi tester to diode mode 6 In case measured value is different from the table PCB needs to be replaced PCB damaged P U V W Nu Nv Nw PFC_IPM check UV WSRST Copyright 2012 LG Electronics Inc All right reserved 118 Only for training and service purposes LGE Internal Use Only Cause of error 5 Trouble Shooting Check point amp Normal condition Input Over Current R WARNING 1 Malfunction of Compressor 2 Blocking of Pipe 3 Low Voltage Input 4 Refrigerant Pipe length Blocked Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart Is installation condition normal Are the resistance Between each phase and insulation resistance of Inverter compressor normal No Yes
6. Copyright 2012 LG Electronics Inc All right reserved 100 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition e Open Short Bad connection of thermistor connector 41 D pipe sensor Inverter Soldered poorly Defect of thermistor connector Open Short Internal circuit error Defect of outdoor PCB Open Short Bad connection of thermistor connector Air sensor e Soldered poorly Defect of thermistor connector Open Short Internal circuit error Defect of outdoor PCB e Open Short Bad connection of thermistor connector e Soldered poorly Defect of thermistor connector Open Short Internal circuit error Defect of outdoor PCB Condenser Mid pipesen sor e Open Short Bad connection of thermistor connector Suction Pipe sensor e Soldered poorly Defect of thermistor connector Open Short Internal circuit error Defect of outdoor PCB e Open Short Bad connection of thermistor connector e Soldered poorly Defect of thermistor connector Open Short Internal circuit error Defect of outdoor PCB Condenser Out pipe sen sor E Error Diagnosis and Countermeasure Flow Chart Is sensor connected to PCB correctly Connect sensor to PCB correctly Yes Yes Replace corresponding outdoor unit PCB Check Point 1 Estimate the resistance of each sensor Unplugged 2
7. Maintain distance between outdoor unit and measurement mode the wall 2 Measure the resistance between rated Check pipe folding and abnormality speed Comp Discharge sensor connector e Check SVC valve lock pins Remedy remove USG eo 8 Measure resistance value of 5kQ 10 ves f 25 C basis lt lt Is the unit properly installed gt 4 Check if the sensor insulation is damaged gt measure the resistance PONP between sensor connector pin and unit Check if refrigerant is overcharged assembly pipe 1MQ or more Is the refrigerant NS properly charged Remedy adjust refrigerant volume Yes CN C PIPE Violet 3Pin Connector NS assembled assembly Check the status of EEV assembly Remedy EEV reassemble replacement Yes No Check the sensor assembly status Check if the sensor is burned measure resistance gt 5KQ 10 25 C basis Is the Cond Pipe SA sensor normal Yes Recheck power and installation condition Copyright 2012 LG Electronics Inc All right reserved 106 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 40 48 56k Bys ER Ve i h lt MAIN PCB gt lt Inverter PCB gt lt EEPROM Direction Check Point gt Copyright 2012 LG Electronics Inc All right reserved 107 Only for training and service purposes LGE Internal Use Only
8. No power on indoor unit Indoor outdoor unit e Check indoor unit power status Power connection e Check indoor outdoor unit error communication power communication line disconnection error caused by external Check the status of indoor outdoor unit ground noise connections Indoor outdoor unit com Check if outdoor unit communication parts are munication circuit parts burned burned If the data transmitted by the indoor unit is not received for 3 minutes continuously R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check if the indoor unit power is on No Check the status of indoor unit normal operation when it is powered on again by remote controller Are the power and the _operation status of indoor unit normal Remedy replace Indoor unit PCB Yes Assembly Are the power and communication lines gt x connection status No Check indoor outdoor unit power and communication line connection L amp N status and the status of disconnection misplacement Yes e Check the status of outdoor unit grounding connection No Check the status of indoor unit grounding connection Check if there is a power line causing noise near indoor outdoor unit
9. 2 TANIA GSI OD CANO Neate cs heed siexs teenie ee ap esas ce oisteasc tein ge een cectventain pice canted eeestelnoneentecsat 22 Fe opaa NE E EEE EE R 23 GE 0 Eg e E E E EN 23 5 2 AES NNN 23 ENN NN 23 6 Convenience Functions amp Controls rrrrrrrrrnrrrrrrrnnnnnnnnnnrrvrvnrrrrrrnnnnnnnrnnrrnnnnnrrnnnnnsnnnn 24 6 1 Auto cnangeover NNN 24 6 2 Ato cicaning OD SL VOM EE NE EEEE EEEE 25 6 3 Auto Operation Fuzzy Operation nnnnnnnneseeenennnsnsssssnsrnnnnnnnnnnrnrrrrrrrrrrrrrreeeeeeneenne 25 STN 26 oe Gha Bove AG UNC UON EM eee eee eee 27 CO lO 0210 0 012 fa Lo EE NE NN ae 27 STA AOD CONTO EN EE NE NE 28 6 8 Sleep Timer NNN 29 Co Timer OOT EEE 29 SETE UG GO OA EE NN NE sin denincdeeauaieatieencidele 29 6 11 TETEN 30 7 Special Function amp KIT ee 31 Tel BOW AIDS Ol COMO EE E 31 V2 SD ACe Or 0 1 ON EE EN 31 T O PUNO Elevation Gb 31 7 4 Defrost Control Heating EEE NE 33 Copyright 2012 LG Electronics Inc All right reserved 13 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 1 List of Functions amp Acc 1 1 List of Functions Indoor KK tm Air supply outlet Airflow direction control left amp right Airflow direction control up amp down Auto swing left amp right Airflow Auto swing up amp down Airflow steps fan
10. By DISTROS E COMMON cece EEE T ENEE EENETI ENEE PETER 36 adelen Ho geo ago EEE NE 37 6 1 High pressure protection control re 37 6 2 Low pressure protection control rrrrnnrnnrrnnernnrnnnrnnnrnnrnnnevnnnnnrnnnennnnnnrnnnennnnnnnsnn 37 6 3 Discharge temperature control rrrnnernerrnanrnnnennnernnnrnnnennnennnernnennuvennnnnnnennnennnnen 37 6 4 Input Current control ee 37 Copyright 2012 LG Electronics Inc All right reserved 34 Only for training and service purposes LGE Internal Use Only Part 3 Basic Control 1 Normal operation Basic principle is to control the rom of the motor by changing the working frequency of the compressor Three phase voltage is supplied to the motor and the time for which the voltage will supplied is controlled by IPM intelligent power module Switching speed of IPM defines the variable frequency input to the motor Actuator Cooling operation Heating operation Stop state Compressor Fuzzy control Fuzzy control Stop Fan Fuzzy control Fuzzy control Stop FEV Super heating Super heating amp Sub cooling Min Pulse fuzzy control fuzzy control x 14 16k Models Frequency that corresponds to each rooms capacity will be determined according to the difference in the tempera ture of each room and the temperature set by the remote controller There are various factors determining the frequency 2 Compressor control Fuzzy control Maintain evaporating temperature Te
11. G http biz lgservice com Multi Air Conditioner MODEL Multi Inverter Type CAUTION Before Servicing the unit read the safety precautions in General SVC manual Only for authorized service personnel Air Conditioner Service Manual TABLE OF CONTENTS Part 1 General Information rerrnnnnnnnnnnnnnrrnrrnrnnn nr aner ann rnnnn vanen rnnennnnennanennnennnennanennnnennnnennnne 2 1 Safety Peas jr 3 2 Model EN 6 3 Nomenclature arrarnrunnnnnnnnrnnnnnvnnnrnernnvnnernnvnnvnnevnnrnsvnnnnnernernnnnnevnernsnnnevnennnnunnverunvnuevn 10 Part 2 Functions amp COntrols ccc ccccccccccceeecceeeeeceeseneeeeaeeecaueesaeeeaeeeaeeesaeeesaeesaneenaeeenaeeenaes 13 1 List of Functions amp Controls 00 ccceccceeecceeeeeeeseeeeseeeeseneeeeaueesaeesaneesaneesaeesans 14 AAI FOW Sane ne rn ee en eee enna nee eee 16 SA PNG raner 18 4 Installation Functions rrvrrrvnnnvnnnrannrnnvnnennnnrnnnrnrvnnennnnrnnnnnsvnnevnernnnnnennnnvunernennnennnn 19 AC ADIL rn Jrt 23 6 Convenience Functions amp Controls rrnrrrrnrnnrnnnnrnnnrrnrnnrnrnnrnrrnrnrenrnrnnrnnenrnnennanennnn 24 7 Special Function amp Nav 31 Part 3 Basic Control 2 0 0 0 ccc ccc cccccccecccceeeceeeeceeeeeeeeeaeeeaueeeaueesaueesaeeesaeeenaueeuaeeenaneesanesnaeeenaeeenaes 34 1 Normal operation nd 35 2 Compressor control a cecesecoeeseeecccre care geaeteasetasdanavaniadeereeientenpanecedieoesesaa eae 35 3 EEV Electronic Expansion Valve control
12. I Function code AF 1 ESP cod O38 ESP value va 4 Move to ESP value setting by pressing button It is 000 when se S c A from the warehouse HI 1 MM ae LI TAM LILI Press button to setup ESP value It is possible to setup ESP value from 1 to 255 lt 5 and 1 is the smallest and 255 is the biggest e When setting ESP value on the product without very weak wind or power wind function it may not work Select ESP fan step again by using button and setup ESP value as No 4 and 5 that corresponds each wind flow Press button to save Press button to exit After setup it automatically gets out of setup mode if there is no button input for 25 seconds When exiting without pressing set button the manipulated value is not reflected Function code ESP code ESP value Please be careful not to change the ESP value for each fan step It does not work to setup ESP value for very low power step for some products ESP value is available for specific range belongs to the product Copyright 2012 LG Electronics Inc All right reserved 20 Only for training and service purposes LGE Internal Use Only E S P setting value reference Part 2 Functions amp Controls Static pressure mmAq 0 1 2 3 4 Model name Step Hi Med Lo Setting value 8 5 CMM 75 84 94 104 114 7 5 CMM 77 88 110 IMBOGAHL N12 9 5 CMM 90 99 109 118 AMN
13. Only for training and service purposes 5 The voltage of micom pin 19 DC4 5V 1 2 Replace PCB Assembly 4 Replace PCB Assembly 5 Replace PCB Assembly 52 LGE Internal Use Only 5 Trouble Shooting 6 2 The Product doesn t operate with the remote controller Turn on the main power A Beeping sound is made No from the indoor unit Refer to 10 1 Yes Check the voltage of power Is it possible to turn on the unit No AC220V AC240V 50H32 by ON OFF button on display Yes Is the remote controller No When the mark 4 is displayed working properly in LCD screen replace battery Yes Check the contact point of CN DISP 1 2 connector amp Re connector Check display PCB Assembly Voltage between CN DISP1 3 6 should be DC 5V If problem still persists Replace display PCB Copyright 2012 LG Electronics Inc All right reserved 53 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 6 3 The Compressor Outdoor Fan are don t operate Turn on the main power Operate Cooling Mode by setting the disired temperature of the remote controller is less than one of the Indoor temperature by 1 C at least When in air circulation mode compressor outdoor fan is stopped Check the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange EVA When the sensor circuit for Indoor temperature and connector are i
14. 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 2012 LG Electronics Inc All right reserved 47 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 2 2 18k 56k This function gathers the refrigerant present in the system to ODU Use this function to store refrigerant of system in ODU for leakage or IDU replacement e Procedure E This function start Dip switch setting status of ODU PCB 1 Set the Dip switch as follow after shutting the power source down 2 Reset the power 3 Check that the Red LED of PCB is on during work The indoor unit is operated by force 4 Pump down during forced cooling operation CAUTION 1 Use pump down function within guaranteed temperature range IDU 20 32C ODU 0 40C 2 Make certain that IDU doesn t run with thermo off mode during operation 3 After the compressor is starting operation please complete Pump Down within 4 minutes 4 Pump Down can be stopped The compressor is turned off because of compressor protection In this case reset the power Copyright 2012 LG Electronics Inc All right reserved 48 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Liquid side Outdoor unit vacuum pump Z o EE Vacuum OPEN ne Gage OPEN e Procedure 1 Connect the vacuum pump to the cent
15. Part 1 General Information 2 2 Outdoor units MULTIF 1 phase A2UW14GFA0 A2UW16GFA0 Heat pump IMU2M15 UL2 IMU2M17 UL2 No of connectable indoor units Max 2 Total capacity index of connectable KW 6 15 7 03 indoor units 24 Power supply 10 220 240V 50Hz Chassis A3UW18GFA0 A3UW21GFA0 Heat pump MU3M19 UE2 IMU3M21 UE2 No of connectable indoor units Max 3 Total capacity index of connectable KW 8 79 9 67 indoor units kBtu h 33 Power supply 10 220 240V 50Hz vChassis A4UW24GFA0 A4UW27GFA0 Heat pump MU4M25 U42 MU4M27 U42 No of connectable indoor units Max 4 Total capacity index of connectable kW 11 4 12 indoor units KBtu h 39 41 Power supply 10 220 240V 50Hz Chassis A5SUW30GFAO0 A5UW40GFA0 JESU MU5M30 U42 MUSM40 U42 No of connectable indoor units Max 5 Total capacity index of connectable KW 14 1 15 2 indoor units kBtu h 52 Power supply 10 220 240V 50Hz Chassis Copyright 02012 LG Electronics Inc All right reserved ere Only for training and service purposes LGE Internal Use Only Part 1 General Information MULTI F px 1 phase NE A7UWA40GFAO0 A8UW48GFA0 A9UW56GFA0 ee FM40AH U42 FM48AH U32 FM56AH U32 No of connectable indoor units Max 7 Max 8 Max 9 Total capacity index of connectable kW 15 2 18 5 21 4 Indoor units kBtu h 52 63 73 Power supply 10 220 240V 50Hz Chassis MULTI F Dx 3 phase
16. screened blocked High temperature in Refrigerant leakage Discharge pipe of the insufficient inverter compressor Poor INV Comp Discharge sensor e LEV connector displaced poor LEV assembly R WARNING e Check outdoor fan constraint screened flow structure e Check refrigerant leakage e Check if the sensor is normal e Check the status of EEV assembly Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking No Remove blockings around heat exchanger e Maintain distance between outdoor unit and the wall e Check pipe folding and abnormality Check service valve lock Is the unit properly N installed 2 Yes No Check refrigerant leakage Supply refrigerant if not enough refrigerant Is there enough OS refrigerant EA Yes Remedy Treat the leakage point Supply additional refrigerant Check the status of PCB CN EEV1 assembly Check the status of EEV assembly Check PCB IPM input signal connectors short circuit gt Refer to CH21 trouble shooting method No Is the EEV properly DS assembled _ aA Yes No Ccheck the sensor assembly status e Check if the sensor is burned lt Is the inverter compressor gt SA sensor normal measure resist
17. to be constant on cooling mode and constant condensing temper ature Tc on heating mode by fuzzy control to ensure the stable system performance Fuzzy control start Target Linear control System capacity Fuzzy Control Cooling and heating load Inverter linear control as cooling and heating load increasing 14 16k Models Capacity steps of compressor are decided by summation of capacity code outdoor temp indoor temp step com pensation of temperature difference indoor temp and setting temp 3 EEV Electronic Expansion Valve EEV operates with fuzzy control rules to keep the degree of superheat about 2 3 C at the evaporator outlet status The degree of superheat Tsuction Tevaporation Tsuction temperature at suction pipe sensor C Tevaporation evaporation temperature C x 14 16k Models EEV operates with PI control rules to keep the degree of superheat at the evaporator inlet and outlet status Copyright 2012 LG Electronics Inc All right reserved 35 Only for training and service purposes LGE Internal Use Only Part 3 Basic Control 4 Oil return control N Oil return operation recovers oil amount in compressor by collecting oil accumulated in pipe Each cycle component operates as shown on the below table during oil return operation Outdoor unit Component Starting Running Ending Compressor Normal control Setting value Normal control Fan Normal control
18. x 14 16k models are not applied 6 2 Low pressure protection control E Cooling Mode Pressure range Compressor 245 kPa lt Pe lt 278 kPa 3Hz down Off Pe lt 212 kPa x 14 16k models are not applied E Heating mode Pressure range Compressor Pe gt 294 kPa Normal control 255 kPa lt Pe lt 294 kPa 3Hz down 229 kPa lt Pe lt 255 kPa 3Hz down 203 kPa lt Pe lt 229 kPa 3Hz down Pe lt 203 kPa Off x 14 16k models are not applied 6 3 Discharge temperature control Temperature range Compressor Td gt 105 C Off 100 C lt Td lt 105 C 5Hz down 95 C lt Td lt 100 C 5Hz down 93 C lt Td lt 95 C Frequency holding 90 C lt Td lt 93 C 3 Hz up Td lt 90 C Normal control 6 4 Input Current control Normal control Frequency down Comp off Input current Less than 10A 14A or less Over than 14A Remarks The data of pressure and frequency are different model by model Copyright 2012 LG Electronics Inc All right reserved 37 Only for training and service purposes LGE Internal Use Only 4 Test Run fal 4 Test Run 1 Check before Test RUIN lt secsccaneceseameceracectevesssraeeceeceneanecasavay2seecsceunedecsie saaniuesusumecceeweenay euenteree 39 2 Test Run Flow chart rvanunanunnnnnnnunnnnunnnunnnnnnnunnnnunnnnnnnnnnnnnnnnunnnnnnnnnnnnnennvevnnnnnnnennnennnevnnnnnnnen 40 S POSE Tre IA EET TE NN NE 41 Copyright 02012 LG Ele
19. 10KQ at 25 C Unplugged lt Internal circuit error Normal voltage DC 2 5V at 25 C plugged e Open Short Indoor inlet pipe sensor Soldered poorly e Internal circuit error Normal resistor 5KQ at 25 C Unplugged Normal voltage DC 2 5V at 25 C plugged Open Short Normal resistor 5KQ at 25 C Unplugged Indoor outlet pipe sensor Soldered poorly Normal voltage DC 2 5V at 25 C plugged e Internal circuit error Check the resistance Check the voltage Check Point 1 Unplug the sensor on Indoor unit PCB 2 Estimate the resistance of each sensor 3 If the resistance of the sensor is 10KQ 5KQ at 25 C then sensor is normal 4 If the resistance of the sensor is 0 KQ or then sensor is abnormal gt Change the sensor 5 Plug the sensor on Indoor unit PCB and Power ON 6 Estimate the voltage of each sensor 7 If the voltage of the sensor is 2 5Vdc at 25 C then sensor is normal 8 If the resistance of the sensor is 0 or 5Vdc then sensor is abnormal gt Repair or Change the PCB Copyright 2012 LG Electronics Inc All right reserved 57 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display Title Cause of error code Check point amp Normal condition Communication Wired R C Open Short 03 Wrong connection Wired R C Indoor Unit 12V S GND 12Vdc D Check the Volt Check the Volt 12V
20. 12kgf cm Mb5 196N cm 20kgf cm M6 245N cm 25kgf cm M8 588N cm 60kgf cm Copyright 2012 LG Electronics Inc All right reserved 43 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting I 5 Trouble Shooting 1 Self diagnosis FunctiOn sssssasasannannnnnnnnnnnnvnnnnnnnnnnnnnnnnnnnnnnnnnnennnennenenennnnensnnnnnnnnnnnnnnnnn 45 VENN 45 2 PFIN Dre 47 TT 47 PE EE EEE 48 PCA de 49 4 Gas AG 50 SE Par dr 51 be Ped 52 6 1 The Product doesn t operate at all rrrrrnrrnnnnnnnorrnrrrrnnnnnrrvnnnrnnnnnrssvnnnrnnnnnnnsrnnnnnnnnn 52 6 2 The Product doesn t operate with the remote controller rrrrrrnrrrrrrrnnnnrrverrnnnnnernrrnnn 53 6 3 The Compressor Outdoor Fan are don t operate r rrrrrrarnrrvnnrrrrrnnnnnnrnnnsrvrrnrrrrnnnnnenn 54 6 4 When indoor Fan does not operate rrrrrrrvrrrrnnnnnrrrvrrrrnnnnnrrvnnnrnnnnnrsrrnnnrnnnnnnnsrnnnnnnnnn 55 6 5 When the louver does not operate cccccssssseecccccccsesseeeeececeeeeseeeeeeeceseaaeeeeesssauaaases 56 6 6 Troubleshooting Indoor Error sunsnsmvamkuiediennd tone nenskvisknnuedennsnnnmddbndnt ek Bi 6 7 Troubleshooting Outdoor Error en 63 Copyright 2012 LG Electronics Inc All right reserved 44 LGE Internal Use Only Only for training and service purposes 1 1 Error Indicator Indoor Ceiling Cassette Type Display 10 degrees 1 degrees The number of times to blink Error code Standard Libero Type Di
21. 2 Voltage value should be in 1V 0 2V Copyright 02012 LG Electronics Inc All right reserved 82 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting gt A4UW24GFA0 AAUW27GFA0 ASUW30GFAO ASUWA40GFA0 A7UWA40GFA0 ASUW48GFA0 ASUW56GFA0 ped Cause of error Check point amp Normal condition An instant over current in the U V W phase Comp lock The abnormal connection of U V W e Over load condition Overcharging of refrigerant Pipe length Outdoor Fan is stop e Poor insulation of compressor Instant over current DC PEAK e Over Rated current IPM Fault Poor insulation of IPM R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure gt Reassemble or manage if abnormality found Is installation condition normal 1 Check resistance between each terminal of compressor 0 438 0 628 7 2 Check insulation resistance between compressor terminal and pipe over 2MQ gt Replace compressor if abnormality found Are the resistance Bet
22. 48 000 Btu h Class gt 48 Pipe Connecting Type M Multiple Pipe Indicates that this is multi system outdoor unit using R410A Ex MUS Connectable max 3 indoor units MU5 Connectable max 5 indoor units Model Ttype H Heat pump Type of refrigerant A R410A Cooling heating capacity Ex 18 000 Btu h Class gt 18 48 000 Btu h Class gt 48 Model type FM Free joint type inverter multi MULTI F DX f LGE Internal Use Only Part 1 General Information 2 5 BD units Global PP m 2 0 tL Serial number Number of connectable indoor units Max capacity of connectable indoor units 36 mean that 5k 24k Indoor unit connected to BD unit BD Branch distributor M Multi system outdoor unit P Parts Copyright 2012 LG Electronics Inc All right reserved 12 az LGE Internal Use Only Only for training and service purposes Part 2 Functions amp Controls e Part2 Functions amp Controls 1 List of Functions amp Controls 2000 00 ccccccccccceceesseeeeseeeeeeeeeeseaseeeeeseeseeeeeeeessesaaagens 14 MUNN 16 2 1 PUNO TIN 16 2 2 Auto SWING UP amp GOWIN EEE 16 ENN 16 2AA ON STOD EE EE EE EEE 17 ESN 17 2 6 Jet Cool Mode NN 17 TN NN 17 SA PANG de 18 3 1 PLASMA Air Purifying System Lausanne Jdevekeemeda ussonnit 18 4 installation FUNCHONS seere etoutnceatontes 19 4 1 E S P External Static Pressure Setting ccccsssssssssssssssseeeeseeeeeeeeeeeeeseeeeeeeeees 19
23. Check the value of the resistor of thermistor D pipe sensor Inverter Normal Value of the resistor is 200kQ at 25 C Air sensor Normal Value of the resistor is 10kQ at 25 C Cond Mid pipe sensor Normal Value of the resistor is 5KQ at 25 C Suction pipe sensor Normal Value of the resistor is 5kQ at 25 C Condenser Out pipe sensor Normal Value of the resistor is 5kQ at 25 C Copyright 2012 LG Electronics Inc All right reserved 101 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition e Bad connection of connector PCB e Bad connection high pressure connector Sensor error of high Abnormal value of sensor esie Open Short e Defect of high pressure connector Open Short p p e Defect of connector PCB Open Short e Defect of outdoor main PCB Is pressure sensor OK Check the value of pressure sensor Cf Output voltage is about 1 4V at 1500kPa No Replace the pressure sensor Yes No p es Connect sensor to PCB correctly Yes After replacement of outdoor No unit main PCB is the system also abnormal END Yes Replace corresponding pressure sensor Copyright 2012 LG Electronics Inc All right reserved 102 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting ed Title Cause of error Check point amp Normal cond
24. Controls 3 Air purifying E 3 1 PLASMA Air Purifying System The PLASMA Air Purifying System not only removes microscopic contaminants and dust but also removes house mites pollen and pet fur to help prevent allergic diseases like asthma This filter that can be used over and over again by simply washing with water Dust particles N 8KV di ea a Q at Q Polluted Air f Odour Copyright 2012 LG Electronics Inc All right reserved Only for training and service purposes Dust electrode discharge lonizer Photo Catalyst Coated Mesh i w RTR scharg h SC rge jt 0 i iT ae it ee a Vt TTT S r Vu I iit ff e 62 Vy l ef y E T NY MEy NAA 17 X i I Generating plasma Odour molecule FI WY YY VV y y AVANBVAVAVAVAVAVAVAVAVAVAVAVAWIITAVA vd i AAAI NAAI NINININI N IA TTT TTT TTT AA E a R TATATA TATA TATATA TATAY 18 LGE Internal Use Only Part 2 Functions amp Controls 4 Installation Functions 4 1 E S P External Static Pressure Setting This function is applied to only duct type Setting this in other cases will cause malfunction Press button for 4 seconds to enter the installer setting mode until timer segment displays 01 01 If pressing button repeatedly it moves to static pressure selection menu as picture below Select
25. Diode voltage measurement mode 3 Measure voltages of P U P V P W as shown in figure 1 below 4 Measure voltages of U Nu V Nu W Nu as shown in figure 2 below 5 If the measurements are distinctively different as in the figures the IPM is decided to be burned Figure 1 Figure 2 Copyright 2012 LG Electronics Inc All right reserved 64 p LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting ad Title Cause of error Check point amp Normal condition Input voltage error low voltage e Check input voltage AC Input current is higher Over load operation e Check outdoor fan canstraint screened flow 22 i than the limit Outdoor fan constraint structure screened blocked e Check PCB current sensor parts e Burned parts inside PCB R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting PCB input current sensing circuit 1 Set Multi tester as DC voltage measurement mode 2 Measure the measuring point DC voltages at Power on standby state e Remedy inspect repair power 3 If the measurements are outside DC 2 5V 0 2V the board parts are decided as burned No Check if the input voltage is Is the input voltage within AC 190 260 V norm
26. LGE Internal Use Only 5 Trouble Shooting Display code Cause of error Check point amp Normal condition e Open Short 41 D pipe sensor Inverter Soldered poorly e Normal resistor 200KQ at 25 C Unplugged Internal circuit error e Open Short Air sensor Soldered poorly Normal resistor 10KQ at 25 C Unplugged e Internal circuit error e Open Short Condenser Mid pipesensor Soldered poorly e Normal resistor 5KQ at 25 C Unplugged e Internal circuit error e Open Short Suction Pipe sensor Soldered poorly e Normal resistor 5KQ at 25 C Unplugged e Internal circuit error e Open Short Condenser Out pipe sensor Soldered poorly e Normal resistor 5KQ at 25 C Unplugged Internal circuit error me e Connect sensor PCB to main PCB correctly Remedy reassemble the sensor Is sensor PCB conn ected to main PCB correctly Yes e Check the status of the PCB connector assembly e Check the status of the sensor assembly Is the sensor properly assembled Remedy reassemble the sensor Yes e Check if the sensor is disconnected Air sensor connector e Check if the sensor is burned Is the sensor normal measure the resistance Condenser e Check if the sensor insulation is Mid pipe connector damaged Condenser Yes out pipe connector Remedy remove cause of error Recheck power and installation condition Main PCB
27. after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure gt Reassemble or manage if abnormality found Is installation condition normal 1 Check resistance between each terminal of compressor 0 438 0 628 7 2 Check insulation resistance between compressor terminal and pipe over 2MQ gt Replace compressor if abnormality found Are the resistance Between each phase and insulation resistance of Inverter compressor normal 1 Check inverter PCB assembly U V W connector connection condition Is compressor 2 Check wire disconnection and wiring Wire connection 3 Check compressor terminal connection condition condition normal bad contact gt Reassemble if abnormality found Check inverter PCB assembly IPM normality Replace inverter PCB assembly Is inverter PCB assembly normal Yes Recheck power and installation condition Vdc IT lt CT Sensing Check Point gt 93 Copyright 02012 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting Cause of error Check point am
28. air or Oxygen and Do not use Flammable gases Otherwise it may cause fire or explosion There is the risk of death injury fire or explosion CAUTION Do not turn on the breaker under condition that front panel and cabinet are removed Be sure to earth the air conditioner with an earthing conductor connected to the earthing terminal Conduct repair works after checking that the refrigerating cycle section has cooled down sufficiently Otherwise working on the unit the hot refrigerating cycle section can cause burns Do not tilt the unit when removing panels Otherwise the water inside the unit can spill and wet floor Do not use the welder in a well ventilated place Using the welder in an enclosed room can cause oxygen deficiency Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Copyright 2012 LG Electronics Inc All right reserved 4 Only for training and service purposes LGE Internal Use Only Part 1 General Information 1 2 Inspections after Repair AWARNING Check to see if the power cable plug is not dirty or loose If the plug is dust or loose it can cause an electrical shock or fire Do not use a joined power cable or extension cable or share the same power outlet with other electrical appliances otherwise it can cause an electrical shock excessive heat generation or fire Do not insert hands or other objects through t
29. checked Check indoor outdoor unit LEV Check Indoor unit PCB Check indoor outdoor unit de i installation conditions Notice it is not full ice forming of strainer in case that there is not at inlet portion but at outlet portion Copyright 2012 LG Electronics Inc All right reserved 128 az LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition Transmission Error Communication Error 1 Micom defect Circuit defect Between PFC Micom gt Between PFC Micom 2 Different Micom S W Version INV Micom and INV Micom 3 ODU inverter PCB assembly damage E Error Diagnosis and Countermeasure Flow Chart Is PFC Micom amp INV Micom S W Program normal Upgrade Micom Program Replace inverter PCB assembly Is Inverter PCB assembly normal Recheck power and installation condition Copyright 02012 LG Electronics Inc All right reserved 129 az LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting rn Cause of error Check point amp Normal condition e Malfunction of current detection circuit Open Short C T Initial current error The voltage of CO1N Is 4 0Vdc 25A Sensor Error e Check CT Sensor output voltage 2 5Vdc 5 E Error Diagnosis and Countermeasure Flow Chart No If the CT Sensor output is not 2 5Vdc 5 Replace
30. circuit WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting PCB IGBT part Check fan locking 1 Remove the connectors to the PCB Remove blockings around heat exchanger 2 Set Multi tester as Resistance Maintain distance between outdoor unit measurement mode and the wall 3 Measure Resistance of Gate collector Is the unit properly installed e Check pipe folding and abnormality Check service valve lock Emitter collector 4 If the measurements are 1MQ Yes Remedy remove cause of error the parts are decided as burned Is the reactor No normal Check Reactor spec 1 1A 13mH Remedy replace reactor Yes Check IGBT part Is IGBT Part resistance measurements is normal at power on standby state gt 1000 1 Yes Remedy replace PCB Assembly Recheck power and installation condition Copyright 2012 LG Electronics Inc All right reserved 69 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Cause of error Check point amp Normal condition e Compressor Locking e Overload operation Outdoor fan constraint screened blocked e Burned parts inside PCB IPM e Burned PCB phase c
31. contact Reassemble if abnormality found Check connection between inverter PCB assembly and bridge diode misconnection disconnection wiring again if abnormality found Check L N phase is 230V 15 gt Check connection condition and wiring if power is abnormal Check inverter PCB assembly IPM normality gt Replace inverter PCB assembly 86 LGE Internal Use Only 5 Trouble Shooting Check Point 1 Check the power source 230V 15 2 Check the fan operation is right 3 Check the current 4 Check the install condition 5 Check the CT Sensor Output signal 24 27 30k Check output the CT Sensor DC 2 5 0 2V 40 48 56k Check output pin 1 2 of the CT Sensor 5V lt CT Sensing Check Point gt lt Inverter PCB gt lt CT Sensing Check Point gt Copyright 2012 LG Electronics Inc All right reserved 87 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Cause of error Check point amp Normal condition e DC Link Voltage is above 420Vdc e DC Link Voltage is below 140Vdc e Check CN_ L CN_ N Connection e Check Input Voltage e Check PCB DC Link voltage sensor parts DC Link High Low Volt R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the sho
32. cool heat 3 3 13 Chaos wind auto wind X Jet cool heat X X Swirl wind X Triple filter Deodorizing X Air purifying Plasma air purifier X Allergy Safe filter X Long life prefilter washable anti fungus X Drain pump X E S P control O Installation Electric heater X High ceiling operation X Auto Elevation Grille X Hot start O Reliability Self diagnosis O Soft dry operation O Auto changeover O Auto cleaning X Auto operation artificial intelligence X Auto Restart O Child lock O Convenience Forced operation X Group control X Sleep mode O Timer on off O Timer weekly O Two thermistor control O Standard Wired remote controller PQRCVSLOQW Deluxe wired remote controller PDRCUDBO Individual control Simple wired remote controller X Simple Wired remote controller for hotel use X Wireless remote controller PQWRHDFO does work with PARCVSLOQW only General central controller Non LGAP X Network Solution LGAP O CAC network function Dry contact PQDSA PQDSA1 PQDSB PQDSB1 PDI power distribution indicator X PI 485 X Damper Controller 4 Zone Controller PBDC40 Special function kit CTI Communication transfer interface X Electronic thermostat X Remote temperature sensor PQRSTAO Others Telecom shelter controller X RF controller PQRFAO Note O Applied X Not applied Accessory model name Installed at field ordered and purchased separately by the corresponding model name sup plied with separate package Copyright 2012 LG E
33. dry operation e When the dehumidification operation input by the remote control is received the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature Intake air Temp Setting Temp 26 C lt intake air temp 25 C 24 C lt intake air temp lt 26 C intake air temp 1 C 22 C lt intake air temp lt 24 C intake air temp 0 5 C 18 C lt intake air temp lt 22 C intake air temp intake air temp lt 18 C e While compressor off the indoor fan repeats low airflow speed and stop e While the intake air temp is between compressor on temp and compressor off temp 10 min dehumidification opera tion and 4 min compressor off repeat Compressor ON Temp gt Setting Temp 0 5 C Compressor OFF Temp gt Setting Temp 0 5 C In 10 min dehumidification operation the indoor fan operates with the low airflow speed Copyright 2012 LG Electronics Inc All right reserved 23 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 6 Convenience Functions amp 6 1 Cooling amp heating Operations 6 1 1 Cooling Mode e Operating frequency of compressor depends on the load condition like the difference between the room temp and the set temp frequency restrictions If the compressor operates at some frequency the operating frequency of compressor cannot be changed within 30 seconds not eme
34. lt EEPROM Direction Check Point gt Copyright 2012 LG Electronics Inc All right reserved 78 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Cause of error Check point amp Normal condition e Overload operation Outdoor fan constraint screened blocked e Check outdoor fan constraint screened flow e Outdoor unit heat structure exchanger contaminated Check if refrigerant overcharged e EEV connector displaced Check the status of EEV assembly poor EEV assembly e Check the status of sensor assembly burn e Poor Cond Pipe sensor assembly burned High temperature in out door Cond Pipe R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking Inspecting Cond Pipe Sensor Remove blockings around heat exchanger 1 Set Multi tester as resistance e Maintain distance between outdoor unit and measurement mode the wall 2 Measure the resistance between rated Check pipe folding and abnormality speed Comp Discharge sensor connector lt lt Is the unit properly installed gt Check SVC valve lock sine Remedy remove USG eo 8 Measure resistance value of 5k0 10 xs 25 C basis 4 Check if the sensor insulation is dama
35. part No Adjust the amount of refrigerant Additive charge Is there pipe crack or trace of refrigerant leakage Yes Yes Weld reconnect the cracked portion and recharge refrigerant Replace the strainer Replace the pressure sensor If the temperature difference between inlet and outlet of strainer Is strainer Ok Yes Are the value of manifold gauge and pressure sensor same Is the low pressure value actually low Check indoor outdoor unit LEV is so large that frost or ice formation can be seen or confirmed Check Indoor unit PCB th f strai hould be checked Check indoor outdoor unit EE ogging nr EET 2 da he se installation conditions Notice it is not full ice forming of strainer in case that there is not at inlet portion but at outlet portion Copyright 2012 LG Electronics Inc All right reserved 97 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition Transmission Error Communication Error 1 Micom defect Circuit defect Between PFC Micom gt Between PFC Micom 2 Different Micom S W Version INV Micom and INV Micom 3 ODU inverter PCB assembly damage E Error Diagnosis and Countermeasure Flow Chart Is PFC Micom amp INV Micom S W Program normal Upgrade Micom Program Is Inverter PCB assembly normal Replace inverter PCB ass
36. setup mode Please press more than 3 seconds for sure If moving to room temperature perception sensor selection menu by pressing button it indicates as picture below Set Thermistor value by pressing button 01 Remote Controller 02 Indoor 03 2TH AN Function Code Thermistor setting g Press button to save or 4 Li LI I Pressing button will exit settings mode After setup it automatically gets out of setup mode if there is no button input for 25 seconds s When exiting without pressing set button the manipulated value is not reflected lt Thermistor Table gt Temperature sensor selection Function 01 Remote controller Operation in remote controller temperature sensor Indoor unit Operation in indoor unit temperature sensor Operation of higher temperature by comparing indoor unit s and wired remote Cooling controller s temperature There are products that operate at a lower temperature Operation of lower temperature by comparing indoor unit s and wired remote controller s temperature Heating The function of 2TH has different operation characteristics according to the product Copyright 02012 LG Electronics Inc All right reserved 30 az LGE Internal Use Only Only for training and service purposes Part 2 Functions amp Controls 7 Special Function amp KIT 7 1 Low Ambient control e This Function is for cooli
37. 0 sec or longer before Fuzzy operation the mode before Fuzzy operation is operated 6 3 1 Fuzzy Operation for Cooling e According to the setting temperature selected by Fuzzy rule when the intake air temp is 0 5 C or more below the set ting temp the compressor is turned off When 0 5 C or more above the setting temp the compressor is turned on Compressor ON Temp gt Setting Temp 0 5 C Compressor OFF Temp gt Setting Temp 0 5 C At the beginning of Fuzzy mode operation the setting temperature is automatically selected according to the intake air temp at that time 26 Cs Intake Air Temp gt 25 C 24 C lt Intake Air Temp lt 26 C gt Intake Air Temp 1 C 22 C Intake Air Temp lt 24 C gt Intake Air Temp 0 5 C 18 Cs Intake Air Temp lt 22 C gt Intake Air Temp Intake Air Temp lt 18 C gt 18 C e When the Fuzzy key Temperature Control key is input after the initial setting temperature is selected the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically accord ing to the Fuzzy rule e While in Fuzzy operation the airflow speed of the indoor fan is automatically selected according to the temperature Copyright 2012 LG Electronics Inc All right reserved 25 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 6 3 2 Fuzzy Operation for Dehumidification According to the setting temperature
38. 12 i Ja lt put Voltage T RO6C ADV ROTC 15K 1 2012 Tester ai ROBC OUI 15K 1 2012 lt CH25 Check Point gt lt INPUT VOLTAGE Check Point gt Copyright 2012 LG Electronics Inc All right reserved 123 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Cause of error Check point amp Normal condition e Check the connection of comp wire U V W e Malfunction of compressor e Check the component of IPM detection parts DC Compressor e Compressor Position Starting fail error E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure gt Reassemble or manage if abnormality found Is installation condition normal 1 Check resistance between each terminal of compressor 1 083 1 1238Q 5 2 Check insulation resistance between compressor terminal and pipe over 50MQ Replace compressor if abnormality found Are the resistance Between each phase and insulation resistance of Inverter compressor normal 1 Check inverter PCB assembly U V W connector connection condition Is compressor 2 Check wire disconnection and wiring Wire dk 3 Check compressor terminal connection condition condition normal bad contact gt Reassemble if abnormality found C
39. 25 C Unplugged Internal circuit error e Open Short e Soldered poorly e Normal resistor SKO at 25 C Unplugged Internal circuit error e Open Short 65 Heat sink sensor e Soldered poorly e Normal resistor 10KQ at 25 C Unplugged Internal circuit error Condenser Mid pipesen sor Condenser Out pipe sen sor Check Point 1 Estimate the resistance of each sensor Unplugged 2 Estimate the voltage of each sensor Plugged 3 If the resistance of the sensor is 0 kQ or then sensor is abnormal If the voltage of the sensor is 0 V or 5Vdc then sensor is abnormal Copyright 2012 LG Electronics Inc All right reserved 131 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Cause of error Check point amp Normal condition e Check the indoor unit capacity 51 Over capacity Over capacity Check the combination table e Check the PCB ASM P No O it ver Capacity Check sum error e Check the poor soldering Mod Gross Max Capacity Btu h Max Single Indoor Unit Capacity Btu h 54k A7UW42LFA0 A8UW48LFAO 62k 24k AQUW56LFA0 73k Check Point CH 51 e CH 60 1 Check the indoor unit capacity 1 Check the insertion condition of EEPROM 2 Check the combination table 2 Check the poor soldering Copyright 2012 LG Electronics Inc All right reserved 132 Only for training and service purpose
40. 4ea Raise PCB and Re wire terminal Assemble C Box and Top Cover take terminals from PCB into a complete whole Copyright 2012 LG Electronics Inc All right reserved 141 p LGE Internal Use Only Only for training and service purposes P NO MFL36552506 February 2012
41. 5 Trouble Shooting Display code Cause of error Check point amp Normal condition 1 ODU fan locking 2 Heatsink assembly of INV PCB assemble condi tion abnormal 3 Defect of temperature sensing circuit part defect of INV PCB Inverter PCB heatsink Heatsink High error J temperature is over 85 C E Error Diagnosis and Countermeasure Flow Chart 1 Check fan locking 2 Check covering of heat exchanger Is installation 3 Check distance between ODU and obstacles condition normal 4 Check pipe distortion and abnormality 5 Check service valve is opened gt Eliminate causes for abnormal condition Is assemble condition of INV PCB heatsink normal No Check assemble condition between INV PCB heatsink and PFC amp IPM module gt Reassemble if abnormality found Yes Check resistance between NO 19 pin and NO 20 pin of PFC module No Check resistance between NO 24 pin and NO 25 pin Is PCB temperature sensing part normal of PFC module gt 7KQ10 at 25 C gt Replace PCB if abnormality found Yes Recheck installation condition and connection of Heat sink Check Point 1 Check resistance between No 19 pin and NO 20 pin of PCB PFC module 2 Check resistance between No 24 pin and NO 25 pin of PCB PFC module only 48 56k 3 Resistance value should be in 7kQ 10 at 25 C Copyright 2012 LG Electronics Inc All right reserved 108 Only for training and service pu
42. Air Guide X O Logical operation Copyright 2012 LG Electronics Inc All right reserved 15 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 2 Air flow a 2 1 Auto swing left amp right By the horizontal airflow direction control key input the left right louver automatically operates with the auto swing or it is fixed to the desired direction 110 120 2 2 Auto swing up amp down e By the auto swing key input the upper lower vane automatically operates with the auto swing or it is fixed to the desired direction 110 120 2 3 Chaos swing up down e By the Chaos swing key input the upper lower vane automatically operates with the chaos swing or it is fixed to the desired direction 110 120 NOTE Some Models are different by swing width and swing pattern Copyright 2012 LG Electronics Inc All right reserved 16 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 2 4 Air flow step Indoor fan motor control have 6 steps Discription Very low In heating mode Low Med High Super high Chaos wind Air volume is controlled SH H Med Low by remote controller e LL step is selected automatically in Hot start operation 2 5 Chaos wind auto wind e When Auto step selected and then operated the high medium or low speed of
43. Any presence of foreign substance such as air can cause an abnormal pressure rise and may result in explosion or injury 50 LGE Internal Use Only 5 Trouble Shooting 5 Cycle Part Trouble analysis 1 Check temperature difference between intake and discharge air and check for the operating current too Symptom Supposed Caused Temp difference approx 0 C All amount of refrigerant leaked out Current less than 80 of rated current Check refrigeration cycle Temp difference approx 8 C Refrigerant leakage Clog of refrigeration cycle Current less than 80 of rated current Defective Compressor Temp difference less than 8 C Excessive amount of refrigerant Current over the rated current Temp difference over 8 C NOTICE Temperature difference between intake and discharge air depends on room air humidity When the room air humidity is relativery higher temperature difference is smaller When the room air humidity is relatively lower temperature difference is larger 2 Check temperature and pressure of refrigeration cycle in cooling mode Suction pressure Temperature of Compared with Discharge Air Compared Cause of Trouble Description the normal value with the normal valve Hi Defective compressor Current is low igh l Defective 4 way reverse valve Excessive amount of High pressure does not quickly Normal refrigerant rise at the beginning of operation Insufficient
44. Comp Current Yes Ne i Check phase current sensing part pe voltage measurements at Power phase current sensing circuit part normal on standby state U V W gt DC 2 5V 0 2V Yes Recheck power and installation condition Remedy replace PCB Assembly Copyright 02012 LG Electronics Inc All right reserved 0 Only for training and service purposes LGE Internal Use Only Display Cause of error code 5 Trouble Shooting Check point amp Normal condition e Overload operation Outdoor fan constraint screened blocked Refrigerant leakage insufficient Poor INV Comp Discharge sensor e LEV connector displaced poor LEV assembly High temperature in Discharge pipe of the inverter compressor R WARNING e Check outdoor fan constraint screened flow structure e Check refrigerant leakage e Check if the sensor is normal e Check the status of EEV assembly Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking Remove blockings around heat exchanger Maintain distance between outdoor unit and the wall Check pipe folding and abnormality e Check service valve lock No Is the unit properly installed 2 Yes Remedy remove cause of erro
45. Connector PCB Suction pipe connector D pipe sensor connector Copyright 2012 LG Electronics Inc All right reserved 74 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Displa DN a Title Cause of error Check point amp Normal condition e Bad connection of connector PCB e Bad connection high pressure connector Sensor error of high Abnormal value of sensor esie Open Short e Defect of high pressure connector Open Short j p e Defect of connector PCB Open Short e Defect of outdoor main PCB Is sensor connected Yes After replacement of outdoor unit main PCB is the system also abnormal Replace corresponding pressure sensor Copyright 2012 LG Electronics Inc All right reserved 75 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting id Title Cause of error Check point amp Normal condition 51 Over capacity Over capacity Combination eo ee eee e Check the combination table Model Gross max capacity Max single indoor unit capacity A2UW14GFA0 21k A2UW16GFA0 12k A3UW18GFA0 A3UW21GFA0 Check Point CH 51 1 Check the indoor unit capacity 2 Check the combination table Copyright 02012 LG Electronics Inc All right reserved 76 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Cause of error Check point amp Normal condition
46. H12GB1A2 IMB12AHL N12 8 5 CMM 84 94 104 114 75CMM 69 v 88 99 10 AMNH18GB2A2 ae EA 13 5 CMM 82 90 99 109 119 11 5 CMM 84 93 103 114 17 CMM 110 117 125 129 I AMNH24GB2A2 MB24AHL N22 ao mw Mu je bed Notes 1 To get the desired Airflow amp E S P combination from the table set the matching value from the table Value other than that in table will not give the combinations of airflow amp E S P which are mentioned in the table 2 Table data is based at 230V According to the fluctuation of voltage air flow rate varies Copyright 02012 LG Electronics Inc All right reserved Only for training and service purposes 21 LGE Internal Use Only Part 2 Functions amp Controls 4 2 High Ceiling operation This function is to adjust FAN Airflow rate according to ceiling height For ceiling type product If pressing button long for 3 seconds it enters into remote controller setter setup mode If pressing once shortly it enters into user setup mode Please press more than 3 seconds for sure If moving to ceiling height selection menu by pressing button A it indicates as picture below TEMP Fo Select ceiling height value by pressing button 01 Low 02 Medium 03 High 04 Very high ee pi Lit A Function Cod Thermistor setting 4 Press button to save End mer 1 Li oi Pressing button will exit settings mode Afte
47. If heating operation is carried out firstly it leads to the trouble of compres sor Then attention must be paid E Carry out the test run more than 5 minutes without fail Test run will be cancelled 18 minutes later auto matically E The forced operation is started by pressing button for 2 seconds The test run is started by pressing button for 3 6 sec onds WE To cancel the test run press any button 3 1 3 Settlement of outdoor unit E Anchor the outdoor unit with a bolt and nut 10mm tightly and horizontally on a concrete or rigid mount When installing on the wall roof or rooftop anchor the mounting base securely with a nail or wire assuming the influence of wind and earthquake E In the case when the vibration of the unit is conveyed to the hose secure the unit with an anti vibration rubber Bolt Tubing connection 3 1 4 Evaluation of the performance Operate unit for 15 20 minutes then check the system refrigerant charge 1 Measure the pressure of the gas side service valve 2 Measure the temperature of the intake and discharge of air 3 Ensure the difference between the intake temperature and the discharge is more than 8 C Cooling or reversely Heating Discharge air Discharge Chassis cover Intake temperature Discharge temperature Intake temperature Discharge air Discharge temperature Copyright 2012 LG Electronics Inc All right reserved 41 Only for trainin
48. MNW24GRCLO me IMS18AQ NCO MS24AQ NCO mounted og AMNWOSGEWAOAMNWO7GEWAO AMNWO9GEBAO AMNW12GEBAO IMS05SQ NWO MS07SQ NWO MS09SQ NBO MS12SQ NBO Libero E T AMNW18GECAO AMNW24GECAO0 IMS18SQ NCO MS24SQ NCO i m AMNHO9GAF11 AMNH12GAF11 a y IMAO9AH1 NF1 MA12AH1 NFI COOL e AMNHO9GAF 1 AMNH12GAF 1 IMAO9AH NF1 MA12AH NF1 a AMNWO07GDB 0 AMNWO09GDB 0 AMNW12GDB 0 O IMSO7AW NBO MSO9AW NBO MS12AW NBO Mirror m AMNW18GDC 0 AMNW24GDC 0 IMS18AW NCO MS24AW NCO AMNHO9GTUCO AMNH12GTUCO 1 Way Py m MTO9AH NU1 MT11AH NUT 7r AMNHOSGTRAO AMNHO7GTRAO ATNHOSGRLE2 ATNH12GRLE2 ceiling MTO6AH NRO MTO8AH NRO CTOONR2 CT12 NR2 ny a m ATNH18GQLE2 ATNH24GPLE2 V ICT18 NQ2 CT24 NP2 TP JE AVNHO9GELA AVNH12GELA2 CVO9NE2 CV12 NE2 Ceiling amp Floor UVNH18GJLA2 UVNH24GJLA2 ICV18 NJ2 CV24 NU cee mo BH ABNH18GHLA2 ABNH24GHLA2 Ke OES j ICB18 NH2 CB24 NB2 Me il tay n AMNHO9GB1A1 AMNH12GB1A1 Duct Static i MBO9AHL N12 MB12AHL N12 pr m AMNH18GB2A1 AMNH24GB2A1 Slim MB18AHL N22 MB24AHL N22 eae AQNHO9GALAO AQNH2GALAO AQNH18GALA0 CQ09 NAO CQ12NA0 CQ18 NAO Indicates color of panel ART COOL Gold G White Silver H Blue B Gallery 1 ART COOL Mirror Mirror R Silver V White W Copyright 2012 LG Electronics Inc All right reserved Only for training and service purposes 265 LGE Internal Use Only
49. Off Normal control EEV Thermo on Normal control Setting value Normal control EEV Thermo off Min Pulse Setting value Min Pulse 4 way valve On Off On Indoor unit Component Starting Running Ending Normal control Fan Normal control Defrost signal Off 5 Defrost control E Off Defrost operation eliminates ice accumulated on heat exchanger recovering performance of heat exchanger Each cycle component operates as shown on the below table during defrost operation Outdoor unit Component Starting Running Ending Compressor Fan Normal control Normal control Setting value Off Normal control Normal control EEV Thermo on Normal control Setting value Normal control EEV Thermo off Min Pulse Setting value Min Pulse 4 way valve On Off On Indoor unit Component Starting Running Ending Fan Normal control Off Normal control Oil return signal Off On Off Copyright 02012 LG Electronics Inc All right reserved Only for training and service purposes 36 LGE Internal Use Only Part 3 Basic Control 6 Protection control 6 1 High pressure protection control Pressure range Compressor Pd gt 4069 kPa Off 3938 kPa lt Pd lt 4069 kPa 3Hz down 3840 kPa lt Pd lt 3938 kPa 3Hz down 3709 kPa lt Pd lt 3840 kPa Frequency holding 3611 kPa lt Pd lt 3709 kPa 3 Hz up Pd lt 3611 kPa Normal control
50. Only Part 1 General Information 1 Safety Precautions To prevent injury to the user or other people and property damage the following instructions must be followed E Incorrect operation due to ignoring instruction will cause harm or damage The seriousness is classified by the follow ing indications WARNING This symbol indicates the possibility of death or serious injury A CAUTION This symbol indicates the possibility of injury or damage to properties only E Meanings of symbols used in this manual are as shown below Be sure not to do Be sure to follow the instruction Dangerous Voltage 1 1 Cautions in Repair AWARNING Be sure to disconnect the power cable plug from the plug socket before disas sembling the equipment for a repair Internal components and circuit boards are at main potential when the equipment is connected to the power cables This volt age is extremely dangerous and may cause death or severe injury if come in con tact with it Do not touch the discharging refrigerant gas during the repair work The discharging refrigerant gas The refrigerant gas can cause frostbite Release the refrigerant gas completely at a well ventilated place first Otherwise when the pipe is disconnected refrigerant gas or refrigerating machine oil discharges and it Can cause injury When the refrigerant gas leaks during work execute ventilation If the refrigerant gas touches to a fire poisonou
51. Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 24 27 30k gt 40k 373 NIHSONYS lt Noise Filter wiring Check Point gt gt s a F LL LL S 4 vn i ET F pA ba lt Main PCB wiring Check Point gt lt Input Power Source Check Point gt Copyright 2012 LG Electronics Inc All right reserved 115 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 48 56k TN LERI 0 MA s lt Inverter PCB wiring Check Point gt lt Input Power Source Check Point gt 116 LGE Internal Use Only Copyright 2012 LG Electronics Inc All right reserved Only for training and service purposes 5 Trouble Shooting gt A7UW42LFA0 A8UW48LFA0 A9UW56LFA0 poe Cause of error Check point amp Normal condition An instant over current in the U V W phase Comp lock Instant over current The abnormal connection of U V W Over Rated current Over load condition Poor insulation of IPM Overcharging of refrigerant Pipe length Outdoor Fan is stop e Poor insulation of compressor DC PEAK IPM Fault WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Cou
52. Remote Controller use it by directing the trans mitter part of Remote Controller to the receiver part of front panel directly under front panel e Do not drop it down or into water Or else there is worry about trouble failure e Do not press hard the Remote Controller button with nail ball point pen or other sharp substance Or else there is worry about trouble failure In case when obstacle such as curtain hides the signal reception part of receiver in between the space interval Remote Controller operation is infeasible Copyright 02012 LG Electronics Inc All right reserved 32 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls e How to Operate the Lift Grill CAUTION Always stop the air conditioner operation for safety before operating lift grill e Take heed _ there is worry about dust fall etc when suction grill descends In case when the set automatic stop distance goes wrong check the set value of operation panel and con firm if there is neither obstacle nor mankind e When you are not to remove obstacle stop the operation before touching the obstacle 1 Stop the Air Conditioner Operation Automatic Stop Distance of Grill 2 Descend the Suction Grill Depress the down button w Then suction grill descends and stops automatically at a certain distance You may stop it at wanted distance point by depressing the stop but ton when descend
53. S GND l i Check Point e Connection of wire e Main PCB Volt DC12V e Noise interference 1 Check the wire connection Open Short gt Repair the connection 2 Check the soldering state of connector Soldered poorly gt Repair or Change the PCB 3 Check the volt Of main PCB power source DC 12V gt Repair or Change the main PCB 4 Check the installation of wired remote controller Noise interference gt Adjust the state of installation Copyright 2012 LG Electronics Inc All right reserved 58 Only for training and service purposes LGE Internal Use Only Display code Title 5 Trouble Shooting Cause of error Check point amp Normal condition 04 Drain pump Float switch CN Float OG Q QD Q Check the resistance Check Point The connection of wire Drain pump Float switch Float switch Open e Drain pump power input 230V Normal short e Drain tube installation Indoor unit installation Inclination kd O N Le At e 0 i 3 5 gs 3 ta fy W t 1 I I i as s h 74 EE Fi N amp er i i FE ET Gav FERRIE ME i i j P 3 A ig 1 i CN Float he D i e 1 Check the wire connection Open Soldered poorly gt Repair the connection or change the PCB 2 Check the resistance of float switch Abnormal Open Normal short gt Check the float switch 3 Check the level of wa
54. Serial number Function A Basic Multi type F Free joint multi type Electrical rating G 1 220 240V 50 60Hz L 3 380 415V 50 60Hz Cooling heating capacity Ex 24 000 Btu h Class gt 24 48 000 Btu h Class gt 48 Model type W DC inverter heat pump Indicates that this is multi system outdoor unit using R410A Ex A4U Connectable max 4 indoor units A9U Connectable max 9 indoor units Copyright 2012 LG Electronics Inc All right reserved 10 Only for training and service purposes LGE Internal Use Only Part 1 General Information 3 3 Indoor Unit Europe MJ Le 12 a H B 3 4 Outdoor Unit Europe mua m 25 Loo Fu 19 a H tL Copyright 2012 LG Electronics Inc All right reserved Only for training and service purposes Color of front panel MA MC model 1 Gallery E Red G Gold H White Silver R Mirror V Silver W White Type of duct indoor MB model No mark High static pressure model L Low static pressure model B Built in model Model type H Heat pump Type of refrigerant A R410A Cooling heating capacity Ex 7 000 Btu h Class gt 07 18 000 Btu h Class gt 18 Type of indoor units S Wall mounted A ART COOL C ART COOL Mirror B Ceiling concealed duct T Ceiling cassette V Ceiling amp Floor Model type M Multi type air conditioner Cooling heating capacity Ex 18 000 Btu h Class gt 18
55. The voltage of Pin No 1 orange and 3 black of CN FAN About AC 160V over About AC 50V over SSR is not damaged Check SSR Copyright 2012 LG Electronics Inc All right reserved 55 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 6 5 When the louver does not operate e Confirm that the vertical louver is normally geared with the shaft of Stepping Motor If the regular torque is detected when rotating the vertical louver with hands Normal e Check the connecting condition of CN U D or CNOL R Connector e Check the soldering condition on PCB of CN U D or CNOL R Connector Check the operating circuit of the vertical louver e Confirm that there is DC 12V between pin of CN U D CNOL R and GND e Confirm that there is a soldering short at following terminals Between and of MICOM Between 8 and 6 of MICOM Between and of ICO1M Between and amp of ICO1M If there are no problems after above checks e Confirm the assembly condition that are catching and interfering parts in the link of the vertical louver Copyright 2012 LG Electronics Inc All right reserved 56 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 6 6 Troubleshooting Indoor Error Display code Title Cause of error Check point amp Normal condition e Open Short l 01 Indoor air sensor Soldered poorly Normal resistor
56. V defect Ref overcharge 2 Compressor damage Insulation damage Motor damage 3 Input voltage abnormal L N 4 Power line assemble condition abnormal 5 Inverter PCB assembly damage input current sensing part AC input instant over cur Inverter PCB input power rent error current is over 48A peak Matter of software for 2ms E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion No 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure gt Reassemble or manage if abnormality found Is installation condition normal Yes Check L N phase voltage is 230V 15 gt Check connection condition and wiring if power is abnormal No Is input voltage normal 1 Check L N connection condition Is AC input Wire connection 2 Check wire disconnection and wiring condition normal gt Reassemble if abnormality found 1 Check inverter PCB assembly U V W connector connection condition 2 Check wire disconnection and wiring 3 Check compressor terminal connection condition bad contact gt Reassemble if abnormality found Is compressor Wire connection condition normal Is inverter PCB a Check inverter PCB assembly IPM normality normal gt Replace inverter PCB assembly Recheck power and installation condition Copyright 2012 LG Electronics Inc All right reserved 114
57. V PCB heatsink normal PFC amp IPM module Reassemble if abnormality found Check resistance between NO 14 pin and sensing part normal 85kQ 6 3 at 25 C e Replace main PCBA it abnormality found Yes Recheck installation condition and connection of Heat sink Y trare Pt vo Copyright 02012 LG Electronics Inc All right reserved 80 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display Gode Title Cause of error Check point amp Normal condition e ODU fan locking e Heatsink assembly of INV PCB assemble condition abnormal e Defect of temperature sensing circuit part defect of INV PCB Inverter PCB heatsink sen 65 Heatsink Sensor error sor is open or short E Error Diagnosis and Countermeasure Flow Chart 1 Check fan locking 2 Check covering of heat exchanger Is installation 3 Check distance between ODU and obstacles condition normal 4 Check pipe distortion and abnormality 5 Check service valve is opened gt Eliminate causes for abnormal condition Is assemble condition Check assemble condition between INV PCB heatsink and PFC amp IPM module of INV PCB heatsink normal gt Reassemble if abnormality found Check resistance between NO 14 pin and NO 16 pin of IPM module 85KQ 6 3 at 25 C e Replace main PCBA it abnormality found Is PCB temperature sensing part normal Recheck install
58. above setting temp Thermo ON Setting temp Thermo OFF 4 C above setting temp Thermo OFF 3 C above setting temp Copyright 2012 LG Electronics Inc All right reserved 24 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 6 2 Auto cleaning operation e Function used to perform Self Cleaning to prevent the Unit from Fungus and bad odor e Used after the Cooling Operation before turning the unit off clean the Evaporator and keep it dry for the next opera tion e The function is easy to operate as it is accessed through the Remote controller ON Cooling Only Unit mn Operation OFF Indoor Fan Setting step 6 3 Auto Operation Artificial Intelligence e When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since the operation off the operation mode is selected e When determining the operation mode the compressor the outdoor fan and the 4 way valve are off and only the indoor fan is operated for 15 seconds Then an operation mode is selected according to the intake air temp at that moment as follows 24 C lt Inatake Air Temp gt Fuzzy Operation for Cooling 21 C lt Inatake Air Temp lt 24 C gt Fuzzy Operation for Dehumidification Inatake Air Temp lt 21 C gt Fuzzy Operation for Heating If any of the operation modes among cooling dehumidification heating mode operations is carried out for 1
59. ack 2 Times 2 Times 2 Times a Contents Me Red M Te case of Error pre 21 DC Link Peak IPM Fault 2times IQ 1times Over Rated Current Off 22 CT 2 Max CT 2times IQ 2times I Input Over Current Off DC Link Low Volt DC Link Volt is below 140Vdc 23 IDG Link High Volt MEET ai 25 2times Q 5times Abnormal AC Volt Input Off 26 DC Compressor Position Error 2times 6times Compressor Starting Fall Error Off 2times IQ 7times Over Inverter PCB input current Off 32 D Pipe High 3times IQ 2times I D Pipe Temp High Off 3times 5times Excessive decrease of Low Pressure Off 39 Communication Error 3times 9times ID Au oo PFC Off 40 CT Sensor Open Short 4times D O CT Circuit Malfunction Off 41 INV D Pipe Th Error 4times IQ 1times Open Short Off 4times I 3times Open Short Off 44 Outdoor Air Th Error 4times 4times Open Short Off 4times 5times Open Short Off 46 Suction Pipe Th Error 4times 6times Open Short Off 4times I 8times Open Short Off 51 Capacity Over 5times IQ 1times Over combination Off Signal Error Indoor lt gt Outdoor 5times 3times Communication Poorly Off 54 3 Phase Wrong wiring 5times Q 4times Q E A of Phase Off 60 EEPROM Check Sum Error 6times Q O Check Sum Mismatching Off 61 Cond Pipe Th High 6times I 1times Cond Temp High Off Heaksink Th High 6tim
60. al Yes Check Fan constraint indoor outdoor unit Remove blockings around heat exchanger Maintain distance between outdoor unit and the wall Check overcharge refrigerant leakage Check service valve lock Yes e Check pipe folding Is the unit installed properly an aa DC_LINK Check voltage measurement on the input current at the power on standby state DC OV 0 2V e Remedy replace PCB Assembly Copyright 2012 LG Electronics Inc All right reserved 65 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting id Title Cause of error Check point amp Normal condition e DC Link Voltage is above l 420Vdc e Check Input Voltage Se eNO TO hs DC Link Voltage is below Check PCB DC Link voltage sensor parts 140Vdc R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting PCB DC Link voltage sensing e Check if the input voltage is Circuit within AC 190 260 V 1 Set Multi tester as DC voltage measurement Is the input voltage normal mode 2 Measure the measuring point DC voltages at Yes Remedy inspect repair power Power on standby state board 3 If the measurements are outside DC 2 4 2 8V the parts are deci
61. amount of Current is low refrigerant Leakage Clogging NOTICE 1 The suction pressure is usually 8 5 9 5kg cm2G Cooling at normal condition R410A 2 The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty Copyright 2012 LG Electronics Inc All right reserved 51 p LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting 6 Electronic Parts 6 1 The Product doesn t operate at all Turn off the main power and wait for 10 seconds Turn on the main power again A Beeping sound is made from the indoor unit Yes No Primarily the operating condition of Micom is O K Check Remote controller amp Receiver Check CN DISP1 CN DISP2 of indoor PCB Check the voltage of power supply AC220V AC240V 50Hz and check for the following The voltage of main power supply The voltage applied to the unit The connecting method of Indoor Outdoor connecting cable each color The PCB Assembly Fuse Noise Filter Power Module Bridge Diode etc The operation check of the Indoor PCB Assembly Procedure 1 The input voltage of power mod Specification Remedy 1 AC230V 30V 1 Check the power outlet ule Check the rated voltage 2 The output voltage of power mod ule 2 12V 3V 4 IC04D 7805 5 ICO1A KIA7036 4 DC5V Copyright 2012 LG Electronics Inc All right reserved
62. ance gt 200KQ 10 25 C basis Copyright 2012 LG Electronics Inc All right reserved 96 Only for training and service purposes Remedy remove cause of error Inspecting Inverter Compressor Discharge Sensor 1 Set Multi tester as resistance measurement mode 2 Measure the resistance between inverter discharge sensor connector pins 3 Measure resistance value of 200KQ 10 25 C basis 4 Check if the sensor insulation is damaged gt measure the resistance between sensor connector pin and unit assembly pipe 1MQ or more CN TH3 RED 4Pin Connector LGE Internal Use Only 5 Trouble Shooting Display Gode Title Cause of error Check point amp Normal condition e Defective low pressure sensor e Defective outdoor indoor unit fan Refrigerant shortage leakage e Deformation because of damage of refrigerant pipe e Defective indoor outdoor unit EEV Excessive decrease of low 35 Low Presser Error e Covering clogging outdoor unit covering during pressure Np the cooling mode indoor unit filter clogging dur ing heating mode e SVC valve clogging e Defective outdoor unit PCB e Defective indoor unit pipe sensor Error diagnosis and countermeasure flow chart Is service valve Open service valve opened Yes Are communication cable check communication piping normal piping correction Yes Is amount of refrigerant normal refer refrigerant
63. and installation condition Copyright 02012 LG Electronics Inc All right reserved 67 az LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting id Cause of error Check point amp Normal condition e Compressor Locking e Overload operation Outdoor fan constraint screened blocked e Burned parts inside e Check compressor locking e Compressor wire open short e Check compressor insulation damage e Check outdoor fan constraint screened flow structure e Check if IMP burned refer to CH21 e Check on PCB current sensing circuit parts Over current at the initial operation of the compres sor location sensing sig nal for compressor opera PCB IPM tion IS not Input Burned PCB phase current sensing circuit parts R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking Inspecting PCB phase current sensing Remove blockings around heat circuit exchanger 1 Set Multi tester as DC voltage measurement Maintain distance between outdoor mode unit and the wall 2 Measure the below measuring point DC Is the unit properly installed Check pipe folding and abnormality voltages at Power on standby state Check service valve lock 3 If the measure
64. ation condition and connection of Heat sink te i a OE Sat mA JA AA Copyright 02012 LG Electronics Inc All right reserved 81 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition e ODU fan locking an Heatsink assembly of INV PCB assemble condi for 5 sec when ODU fan tion abnormal starts or 40 RPM or less after fan starting e Defect of temperature sensing circuit part defect of INV PCB 67 Fan Lock Error E Error Diagnosis and Countermeasure Flow Chart Check ODU Fan Motor assemble condition and fan locking gt Reassemble or replace if abnormality found 1 Set the multi tester to diode mode 2 Check voltage between 1pin and 4pin of Fan Motor Is ODU Fan Motor Assemble condition normal No Is ODU Fan Motor normal 1 0 2V 3 Replace Inverter PCB if abnormality found Yes l Check wiring between OUD fan motor and Inverter PCB Is wire connection of No Check if Hall Senor and Motor output terminal color is ODU Fan Motor wire normal matched gt Reassemble if abnormality found Yes Replace connector PCB assembly Is connector PCB assembly normal Replace main PCB assembly Is main PCB assembly normal Recheck power and installation condition Check Point 1 Check voltage between ipin and 4pin of Fan Mortor connector Tester diode mode
65. ctronics Inc All right reserved 38 Only for training and service purposes LGE Internal Use Only 4 Test Run 1 Check before Test Run Check to see whether there is any refrigerant leakage and check whether the power or transmission cable is connected properly Check liquid pipe and gas pipe valves are fully opened NOTE Be sure to tighten caps Confirm that 500 V megger shows 2 0 MQ or more between power supply terminal block and ground Do not operate in the case of 2 0 MQ or less NOTE Never carry out mega ohm check over terminal control board Otherwise the control board may break Immediately after mounting the unit or after leaving it turned off for an extended length of time the resistance of the insulation between the power supply terminal board and the ground maydecrease to approx 2 0 MQ as a result of refrigerant accumulation in the internal compressor If the insulation resistance is less than 2 0 MQ turn on the main power supply Copyright 02012 LG Electronics Inc All right reserved 39 Only for training and service purposes LGE Internal Use Only 4 Test Run 2 Test Run Flow chart Test operation for indoor unit N l Operate the unit in cooling mode 0 Refer to part4 6 Electric part Does Test operation start Yes Is cold air discharged for more than 3 minutes es Y Refer to part4 5 Cycle part Is there any temperature difference between intake and discharg
66. ded as burned e Measure DC Link voltage at Power on standby state DC 280 310V Is the PCB Power part normal e Remedy replace PCB Assembly Yes If measurement of DC Link voltage at Power on PCB DC Link voltage sensor part normal standby state is DC 280 310V and DC Link sensed voltage DC 2 4 2 8V Yes e Remedy replace PCB Assembly Recheck power and installation condition Copyright 02012 LG Electronics Inc All right reserved 66 og LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition Input voltage is over limited 1 Input voltage abnormal R S T 25 Input Voltage high low value of the product 140V 2 Outdoor unit main PCB assembly damage or less 300V or more input voltage sensing part Error Diagnosis and Countermeasure Flow Chart Are there any power wire connections normal 1 Check L N G wiring conditions gt Rewire them if abnormality found Check R S S T T R phase voltage is 220V 10 Is input voltage normal gt Check connection condition and wiring if power is abnormal Is main PCB assembly power Check connection between main PCB assembly and bridge connection normal diode misconnection disconnection gt wiring again if abnormality found Yes v Monitoring PCB LED display error Replace main PCB assembly Recheck power
67. direction connection condition Is EEPROM insertion normal 2 Check EEPROM Check SUM Replace if abnormality found Is inverter PCB assembly normal Replace inverter PCB assembly Yes Replace MAIN PCB assembly MAIN PCB assembly normal Recheck power and installation condition Check Point Check the EEPROM Check sum amp Direction 24 27 30k EEPROM a ROM HETEN ETE STE EEE EE Copyright 02012 LG Electronics Inc All right reserved 105 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting id Cause of error Check point amp Normal condition e Overload operation Outdoor fan constraint screened blocked e Check outdoor fan constraint screened flow e Outdoor unit heat structure door Cond Pipe exchanger contaminated Check if refrigerant overcharged l e EEV connector displaced Check the status of EEV assembly High temperature in out poor EEV assembly e Check the status of sensor assembly burn Poor Cond Pipe sensor assembly burned R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking Inspecting Cond Pipe Sensor Remove blockings around heat exchanger 1 Set Multi tester as resistance
68. e procedure is the same if using a gas cylinder 3 Open the valve Lo side on the charge set and charge the system with liquid refrigerant If the system can not be charged with the spec ified amount of refrigerant it can be charged with a little at a time approximately 150g each time while operating the air conditioner in the cooling cycle however one time is not suffi cient wait approximately 1 minute and then repeat the procedure pumping down pin Copyright 2012 LG Electronics Inc All right reserved Only for training and service purposes Outdoor unit This is different from previous procedures Because you are charging with liquid refrigerant from the gas side absolutely do not attempt to charge with larger amounts of liquid refrigerant while operating the air conditioner 4 Immediately disconnect the charge hose from the 3 way valve s service port Stopping partway will allow the gas to be discharged f the system has been charged with liquid refrig erant while operating the air conditioner turn off the air conditioner before disconnecting the hose 5 Mount the valve stem nuts and the service port nut Use torque wrench to tighten the service port nut to a torque of 1 8 kg m Be sure to check for gas leakage R WARNING When installing or relocation the unit make sure that no substance other than the specified refriger ant R410A enter the refrigerant circult
69. e setting temperature is automatically selected according to the intake air temp at that time 20 C lt Intake Air Temp gt Intake Air Temp 0 5 C Intake Air Temp lt 20 C gt 20 C e When the Fuzzy key Temperature Control key is input after the initial setting temperature is selected the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically accord ing to the Fuzzy rule e While in Fuzzy operation the airflow speed of the indoor fan is set to the high or the medium according to the intake air temperature and the setting temperature Notes The Temp of Comp Turn ON and OFF is different in heating mode and fuzzy operation for heating Please refer page 11 6 4 Auto restart Operation e Whenever there is electricity failure to the unit and after resumption of the power unit will start in the same mode prior to the power failure Memorized condition are on off condition operating mode cooling heating set temperature and fan speed The unit will memorize the above conditions and start with same memorized condition Copyright 2012 LG Electronics Inc All right reserved 26 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 6 5 Child Lock Function It is the function to use preventing children or others from careless using 1 Press button repeatedly until the amp is flashing setup icon blink
70. ection 2 Check wire disconnection and wiring condition normal gt Reassemble if abnormality found 1 Check inverter PCB assembly U V W connector connection condition 2 Check wire disconnection and wiring 3 Check compressor terminal connection condition bad contact gt Reassemble if abnormality found Is compressor Wire connection condition normal Is inverter PCB assembly normal Recheck power and installation condition Check inverter PCB assembly IPM normality gt Replace inverter PCB assembly Copyright 2012 LG Electronics Inc All right reserved 138 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting lt Input Power Source Check Point gt lt Inverter PCB wiring Check Point gt Copyright 02012 LG Electronics Inc All right reserved 139 p LGE Internal Use Only Only for training and service purposes 6 Service Order mn Part 6 Service Order 1 PCB Service Order 0c ccc cccccccccccccccceccuccuceuccuccucuucuucuecuucueaucuueuecusecusuusueaseussaesaesaeeas 141 Copyright 02012 LG Electronics Inc All right reserved 140 Eg LGE Internal Use Only Only for training and service purposes 6 Service Order gt Main PCB ENALN CHANA Remove Top Cover and Take Terminals from PCB Hang wires up on the Rib Control Box Cover with a tool from Case and Insert PCB into Control Box Remove PCB Screws 4ea Replace New PCB Tighten PCB Screws
71. ed air Yes Is the operating current No Check the load In Out Temp normal Check pipe length and amount of Yes refrigerant Check for abnormal sound in Operation mods enange outdoor unit comp Fan others to Heating mode Is hot air discharged No Refer to Troubleshooting After Hot Start Guide Yes Normal e Each indoor unit should be tested If the unit has accessory it should be tested Copyright 2012 LG Electronics Inc All right reserved 40 p LGE Internal Use Only Only for training and service purposes 3 Test Running l 4 Test Run 3 1 SPLIT ART cool ART cool deluxe Type e Check that all tubing and wiring have been properly con nected e Check that the gas and liquid side service valves are fully open 3 1 1 Prepare remote controller Remove the battery cover by pulling it according to the arrow direction Insert new batteries making sure that the and of battery are installed correctly Reattach the cover by pushing it back into position NOTE e Use 2 AAA 1 5volt batteries Do not use rechargeable batteries e Remove the batteries from the remote controller if the sys tem is not going to be used for a long time 3 1 2 Precautions in test run E The initial power supply must provide at least 90 of the rated voltage Otherwise the air conditioner should not be operated E For test run carry out the cooling operation firstly even during heating season
72. embly Recheck power and installation condition Copyright 02012 LG Electronics Inc All right reserved 98 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Cause of error Check point amp Normal condition e Malfunction of current detection circuit C T E Open Short Sensor Error Initial current error e Check CT Sensor output voltage 2 5Vdc 5 WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart Is input voltage normal Check L N Voltage is 230V 15 Is Inverter PCB Normal Replace inverter PCB assembly Yes Recheck power and installation condition Check Point 1 Check the Input Voltage L N gt 230V 10 2 Check Input Voltage Sensor output voltage 2 5Vdc 10 lt Input Power Source Check Point gt Copyright 2012 LG Electronics Inc All right reserved 99 p LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting gt 24 27 30k pl pme fo mA Red Black Vdc lt CT Sensing Check Point gt gt 40 48 56k E o LCOMPCU i COMPCLD COMPCUD B C lt Inverter PCB gt lt CT Sensing Check Point gt
73. er hose 4 Disconnect the charge hose from the vacuum of charge set center hose pump Vacuum pump oil 2 Evacuation for approximately one hour If the vacuum pump oil becomes dirty or Confirm that the gauge needle has moved depleted replenish as needed toward 0 8Torr 3 Close the valve Lo side on the charge set WARNING turn off the vacuum pump and confirm that the gauge needle does not move approxima tely 5 minutes after turning off the vacuum Use a vacuum pump or Inert nitrogen gas when doing leakage test or air purge Do not compress air or Oxygen and do not use Flammable gases pump Otherwise it may cause fire or explosion Otherwise it may cause personal injury Copyright 02012 LG Electronics Inc All right reserved 49 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 4 Gas Charging After Ev TN Gas side Check valve Charging cylinder 1 e Procedure 1 Connect the charge hose to the charging cylinder Connect the charge hose which you dis con nected from the vacuum pump to the valve at the bottom of the cylinder If you are using a gas cylinder also use a scale and reverse the cylinder so that the sys tem can be charged with liquid 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air Be careful of the liquid refriger ant Th
74. er is input It is off when the time set by the timer is reached If the appliance is operating at the time set by the timer the operation continues While in Fuzzy operation the airflow speed of the indoor fan is automatically selected according to the temperature 6 9 2 Off Timer Operation e When the set time is reached after the time is input by the remote control the appliance stops operating The timer LED is on when the off timer is input It is off when the time set by the timer is reached If the appliance is on pause at the time set by the timer the pause continues 6 10 Weekly Program If necessary an operator can make an On Off reservation of the product for a period of one week On Off schedule of operation for a period of ONE week No need to turn the unit On OFF manually during working days On Off time is scheduled in micom of the wired remote control Operation Time Table Example Setting Temp 25 C 25 C 25 C 09 00 08 00 09 00 12 00 17 00 12 00 Copyright 2012 LG Electronics Inc All right reserved 29 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 6 11 Two Thermistor Control This is the function to select the temperature sensor to judge the room temperature lf pressing button long for 3 seconds it enters into remote controller setter setup mode If pressing once shortly it enters into user
75. erant shortage leakage e Deformation because of damage of refrigerant pipe e Defective indoor outdoor unit EEV Excessive decrease of low 35 Low Presser Error e Covering clogging outdoor unit covering during pressure Np the cooling mode indoor unit filter clogging dur ing heating mode e SVC valve clogging e Defective outdoor unit PCB e Defective indoor unit pipe sensor E Error diagnosis and countermeasure flow chart Is service valve opened Open service valve Yes check communication piping correction Are communication cable piping normal Yes Is amount of refrigerant normal refer refrigerant part No Is there pipe crack or trace of refrigerant leakage Adjust the amount of refrigerant Additive charge Yes Yes Weld reconnect the cracked portion and recharge refrigerant Is fan normal in heating outdoor fan in cooling indoor fan No Check and replace related parts error 105 108 reference Yes No Is strainer Ok Replace the strainer Yes Are the values of manifold and low pressure sensor same Is the low pressure value actually low No Replace the pressure sensor Yes If the temperature difference between inlet and outlet of strainer is so large that frost or ice formation can be seen or confirmed then clogging of strainer should be checked Check indoor outdoor unit LEV Check Indoor unit PCB Check indoor outdoor un
76. erter PCB if abnormality found Is ODU Fan Motor Assemble condition normal No Is ODU Fan Motor normal Yes Check wiring between OUD fan motor and Inverter PCB No Check if Hall Senor and Motor output terminal color is matched Reassemble if abnormality found Is wire connection of ODU Fan Motor wire normal Yes Replace Inverter PCB assembly Is Inverter PCB assembly normal Recheck power and installation condition Check Point 1 Check voltage between ipin and 4pin of Fan Mortor connector Tester diode mode 2 Voltage value should be in 1V 0 2V 3 Do not replacing all of fan motor and PCB at once Check error code again after replacing the abnormal part Fan Motor or PCB first Copyright 02012 LG Electronics Inc All right reserved 112 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 24 27 30k E Ly JET T oe os o i a EELE um od m j p y a y 3 eH KI ae 2 x lt Main PCB gt lt Inverter PCB gt Copyright 2012 LG Electronics Inc All right reserved 113 Only for training and service purposes Check voltage betwen 1pin and 4pin of fan motor Fan motor connector Tester LGE Internal Use Only 5 Trouble Shooting Cause of error Check point amp Normal condition 1 Overload operation Pipe clogging Covering EE
77. es 2times I Heatsink Temp High Off 65 Heaksink Th Error 6times 5times Open Short Off 6times I 7times Outdoor Fan is not operation Off Q A light on the display panel is blink 46 Copyright 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting SN Liquid side n en Outdoor unit TN Gas side 2 Pump Down 2 1 14k 16k N uy D Lo QI CLOSE ay j E Purge the air e Procedure 1 Confirm that both the 2 way and 3 way valves 6 Operate the air conditioner at the cooling are set to the open position cycle and stop it when the gauge indicates Remove the valve stem caps and confirm that 1kg cm g the valve stems are in the raised position Be sure to use a hexagonal wrench to operate 7 Immediately set the 3 way valve to the closed the valve stems position Do this quickly so that the gauge ends up indi 2 Operate the unit for 10 to 15 minutes cating 3 to 5kg cm g 3 Stop operation and wait for 3 minutes then 8 Disconnect the charge set and mount the 2 connect the charge set to the service port of way and 3 way valve s stem nuts and the ser the 3 way valve vice port nut Connect the charge hose with the push pin to Use torque wrench to tighten the service port the service port nut to a torque of 1 8 kg m Be sure to check for gas leakage 4 Air purging of the charge hose
78. es 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition e Condenser pipe sensor detected high temp 65 C e Check the load condition e Check the sensor of Condenser pipe sensor 61 Condenser pipe sensor temp high Heat sink sensor e Heat sink sensor detect Check the Heat sink sensor 10kQ 10 at 25 C temp high ed high temp 85 C e Check that outdoor fan is driving rightly Comp frequecy control accoding to heatsink temp E Comp frequency control according to heat sink temp Is normal heatsink sensor No connecting Connect the heatsink sensor right Yes Is normal heatsink sensor No Replace the heatsink sensor 10ko 10 at 25 C Yes No Is normal Inverter PCB Replace the heatsink sensor Yes Recheck power and installation condition Copyright 2012 LG Electronics Inc All right reserved 135 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Cause of error Check point amp Normal condition 1 ODU fan locking 2 Heatsink assembly of INV PCB assemble condition abnormal 3 Defect of temperature sensing circuit part defect of INV PCB Inverter PCB heatsink H ink Sensor error eatsink Sensor erro sensor is open or short E Error Diagnosis and Countermeasure Flow Chart 1 Check fan locking 2 Check covering of heat exchanger Is installation 3 Chec
79. f Live Neutral 2 In Case of CH53 Check the Connection 3 Check the resistance between communication line and GND Normal gt GN COMM at the Main PCB gt L N at the terminal block Over 2MQ 4 Check the connector for communication is correctly connected 5 If one indoor unit is operated normally outdoor PCB is no problem Check the another indoor unit CHO5 is displayed at indoor unit CH53 is displayed at outdoor unit 6 If all indoor unit is displayed CH05 but outdoor PCB not display CH53 Check the CN_COM and CN_POWER is correctly connected 24 27 30k 1 In Case of CH53 Check the Connection gt L N at the terminal block lt TERMINAL BLOCK gt Copyright 2012 LG Electronics Inc All right reserved 104 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display Eade Title Cause of error Check point amp Normal condition 1 EEPROM contact defect wrong insertion 2 Different EEPROM Version 3 ODU Inverter amp Main PCB assembly damage Inverter PCB amp Main EEPROM Access error EEPROM check sum error and Check SUM error R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart 1 Check EEPROM insert
80. g and service purposes LGE Internal Use Only 4 Test Run 3 2 CVT Type 3 2 1 Connection of power supply 1 Connect the power supply cord to the independent power supply e Circuit breaker is required 2 Prepare the remote control Insert two batteries provided Remove the battery cover from the remote controller e Slide the cover according to the arrow direction Insert the two batteries Two ROS or AAA dry cell batteries or equivalent Be sure that the and directions are correct Be sure that both batteries are new Re attach the cover e Slide it back into position 3 Operate the unit for fifteen minutes or more 3 2 2 Evaluation of the performance 1 Measure the temperature of the intake and discharge air 2 Ensure the difference between the intake temperature and the discharge one is more than 8 C Cooling or reversely Heating 3 2 3 Selection of the slide switch according to installation method 1 In case the indoor unit is installed on the floor please change the side switch which is on the Main PCB Assembly to the BOTTOM state 2 In case the indoor unit is installed under the ceiling please change the slide switch which is on the Main PCB Assembly to the CEILING state The initial state of the slide switch is set for the bottom installation CEILING BOTTOM Copyright 02012 LG Electronics Inc All right reserved 42 Only for training and service pur
81. ged gt measure the resistance between sensor connector pin and unit assembly pipe 1MQ or more Is the refrigerant S properly charged gt Check if refrigerant is overcharged Remedy adjust refrigerant volume Yes CN C PIPE Violet 3Pin Connector NS assembled assembly Check the status of EEV assembly e Remedy EEV reassemble replacement Yes No Check the sensor assembly status Check if the sensor is burned measure resistance gt 5KQ 10 25 C basis Is the Cond Pipe NS sensor normal Yes Replace the Thermistor Copyright 2012 LG Electronics Inc All right reserved 79 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition e ODU fan locking e Heatsink assembly of INV PCB assemble condi tion abnormal e Defect of temperature sensing circuit part defect of INV PCB Inverter PCB heatsink tem 62 Heat Sink High perature is over 85 C E Error Diagnosis and Countermeasure Flow Chart 1 Check fan locking 2 Check covering of heat exchanger Is installation 3 Check distance between ODU and obstacles condition normal 4 Check pipe distortion and abnormality 5 Check service valve is opened gt Eliminate causes for abnormal condition Is assemble condition Check assemble condition between INV PCB heatsink and of IN
82. he air inlet or outlet while the prod uct is operating There are sharp and moving parts that could cause personal injury Do not block the inlet or outlet of air flow It may cause product failure CAUTION Check to see if the parts are mounted correctly and wires are connected Improper installation and connections can cause an electric shock or an injury Check the installation platform or frame has corroded Corroded installation plat form or frame can cause the unit to fall resulting in injury Be sure to check the earth wire is correctly connected After the work has finished be sure to do an insulation tset to check the resis tance is 2 Mohm or more between the charge section and the non charge metal section Earth position If the resistance value is low a disaster such as a leak or electric shock is caused at user s side Check the drainage of the indoor unit after the repair If drainage is faulty the water to enter the room and wet floor Copyright 2012 LG Electronics Inc All right reserved 5 Only for training and service purposes LGE Internal Use Only Part 1 General Information 2 Model Line Up 2 1 Indoor units Model names Capacity KW kBtu h Category Type Chassis 15 23 2 6 35 53 70 5 7 9 12 18 24 m AMNWO7GRBLO AMNWO9GRBL0 AMNW12GRBLO MSO7AQ NBO MS09AQ NBO MS12AQ NBO Libero R m AMNW18GRCLO A
83. heck inverter PCB assembly IPM normality gt Replace inverter PCB assembly Is inverter PCB assembly normal Yes Recheck power and installation condition Check Point 1 Check the connection condition of PCB 2 Check the connection condition of Comp U V W wire 3 Check the comp resistor and insulation resistance 4 Check the IPM Refer 106 page 5 Check the pressure of refrigerant 6 Check the Service Valve Open Copyright 2012 LG Electronics Inc All right reserved 124 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Cause of error Check point amp Normal condition Overload operation Pipe clogging Covering EEV defect Ref overcharge Compressor damage Insulation damage Motor damage Input voltage abnormal L N Power line assemble condition abnormal Inverter PCB assembly Damage input current sensing part Inverter PCB input current is over100A peak for 2us AC Input Instant over Current Error WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion No 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operatio
84. hown in the right picture e You cannot control the group as shown in the right for some prod ucts e Refer to the product manual for more detail MASTER SLAVE lt When simultaneously connecting 2 sets of wired remote controller gt e When controlling in groups set the master slaver of the remote controller Refer to Installer setting section on how to set mas ter slave for more detail Copyright 2012 LG Electronics Inc All right reserved 28 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 6 8 Sleep Timer Operation e When the sleep time is reached after lt 1 2 3 4 5 6 7 0 cancel hr gt is input by the remote control while in appliance operation the operation of the appliance stops e While the appliance is on pause the sleep timer mode cannot be input e While in cooling mode operation 30 min later since the start of the sleep timer the setting temperature increases by 1 C After another 30 min elapse it increases by 1 C again e When the sleep timer mode is input while in cooling cycle mode the airflow speed of the indoor fan is set to the low e When the sleep timer mode is input while in heating cycle mode the airflow speed of the indoor fan is set to the medi um 6 9 Timer On Off 6 9 1 On Timer Operation e When the set time is reached after the time is input by the remote control the appliance starts to operate The timer LED is on when the on tim
85. ing 3 Raise the Suction Grill Depress the up button amp Then suction grill goes up and enters into the front panel Automatic stop distance 4 Stop the Suction Grill during Rising Depress the stop button Make use of this when you want to stop it at your wished posi tion mn Medium Automatic stop distance 1 5 0 5m 2 5 0 5m 3 5 0 5m If you want to change automatic distance setting consult with your sale agency 7 4 Defrost Control Heating e Defrost operation is controlled by timer and sensing temperature of outdoor pipe The first defrost starts only when the outdoor pipe temperature falls below 11 C after starting of heating operation and more than 10 minutes operation of compressor e Defrost ends after 15 minutes passed from starting of defrost operation when the outdoor rises over 40 C even before 12 minutes e The second defrost starts only when the outdoor pipe temperature falls below 6 C after from ending of the first defrost and more than 10 minutes operation of compressor Copyright 2012 LG Electronics Inc All right reserved 33 Only for training and service purposes LGE Internal Use Only Part 3 Basic Control fal 3 Basic Control 1 NOTAR 35 2 Compressor control re cptecescesec sa hac cee odes a epeeeacts ne 35 3 EEV Electronic Expansion Valve control r rrrrrrrrrrrnnnnnnnvrnvrnnnnnnrnvrnnrnnnnnnrernnnrrnnnnn 35 4 Oil return control Vee 36
86. it de i installation conditions Notice it is not full ice forming of strainer in case that there is not at inlet portion but at outlet portion Copyright 2012 LG Electronics Inc All right reserved 2 az LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition AC Input current Comp phase current sensing cir PCB sensing circuit part Check power input connector Comp output cuit basic vlotage sens burned current sensing circuit ing error 40 R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts e Check voltage measurement Is AC input current on the input current Fig 1 sensing part normal at the power on standby state DC OV 0 2V Remedy remove cause of error DC voltage measurement Is the Comp phase at the measurement point in Current sensor figure 2 at power on part normal standby state gt measured value within 2 5V 0 2V e Remedy remove cause of error Recheck power and installation condition ETE TG TITT EL FER I Comp Current Copyright 2012 LG Electronics Inc All right reserved 3 Only for training and service purposes
87. ition 51 Over capacity Over capacity Combination epee eee er e Check the combination table Model Gross max capacity Max single indoor unit capacity A4UW24GFA0 39k A5UW30GFA0 48k A5UW40GFAO A7UW40GFAO A8UWA48GFA0 AS9UWW56GFAO0 Check Point CH 51 1 Check the indoor unit capacity 2 Check the combination table Copyright 02012 LG Electronics Inc All right reserved 103 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition e Power input AC 230V Outdoor Indoor Title The connector for transmission is disconnected ai Communication poor e The connecting wires are misconnected Communication poory The communication line is shorted at GND Indoor gt Outdoor Transmission circuit of outdoor PCB is abnormal e Transmission circuit of indoor PCB is abnormal Ay WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check Point 40 48 56k 1 Check the input power AC230V Outdoor Indoor unit 1 In Case of CHOS Check the Connection 2 Check the communication wires are correctly connected gt CON POWER CN COMM at the Main PCB Adjust the connection of wire Confirm the wire o
88. k Check Point 1 Check resistance between No 19 pin and NO 20 pin of PCB PFC module 2 Check resistance between No 24 pin and NO 25 pin of PCB PFC module only 48 56k 3 Resistance value should be in 7kQ 10 at 25 C 4 Check the PFC Module No 19 20 and IPM Module No 24 25 pin soldering condition Copyright 2012 LG Electronics Inc All right reserved 110 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 24 27 30k Location of SPM PSCM PFCM BE a OA ee a L fe I Bibi tienee Fd Lurt A PSCM PFCM B SPM 40 48 56k PFCM IPM Measuring resistance Measuring resistance between No 19 20 pin between No 24 25 pin Copyright 2012 LG Electronics Inc All right reserved s LE Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting pla Cause of error Check point amp Normal condition 1 ODU fan locking Fan RPM ts 10RPM or less for 5 sec when ODU tion abnormal FAN OLE fan starts or 40 RPM or less after fan starting 3 Defect of temperature sensing circuit part defect of INV PCB 2 Heatsink assembly of INV PCB assemble condi E Error Diagnosis and Countermeasure Flow Chart Check ODU Fan Motor assemble condition and fan locking gt Reassemble or replace if abnormality found 1 Set the multi tester to diode mode 2 Check voltage between 1pin and 4pin of Fan Motor 140 2V 3 Replace Inv
89. k distance between ODU and obstacles condition normal 4 Check pipe distortion and abnormality 5 Check service valve is opened gt Eliminate causes for abnormal condition Is assemble condition Check assemble condition between INV PCB heatsink and of INV PCB heatsink normal PFC amp IPM module gt Reassemble if abnormality found Check resistance between NO 19 pin and NO 20 pin of PFC module Is PCB temperature Check resistance between NO 24 pin and NO 25 pin sensing part normal of PFC module 7KQ 10 at 25 C Replace inverter PCB assembly gt Replace PCB if abnormality found Check Point 1 Check resistance between No 19 pin and NO 20 pin of PCB PFC module 2 Check resistance between No 24 pin and NO 25 pin of PCB PFC module only 48 56k 3 Resistance value should be in 7kQ 10 at 25 C 4 Check the PFC Module No 19 20 and IPM Module No 24 25 pin soldering condition Copyright 2012 LG Electronics Inc All right reserved 136 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display ead Title Cause of error Check point amp Normal condition e Check the fan condition e Check the fan connector e Check the fan control part of the INVERTER PCB Outdoor fan e Outdoor fan is not oper lock ating E Error Diagnosis and Countermeasure Flow Chart CH67 Outdoor fan lock occurrence Is fan connector condition right N Do right fan c
90. lance of current in the compressor operation phase gt the difference between each phase current should be within 2A Remedy replace PCB Assembly Copyright 02012 LG Electronics Inc All right reserved 63 Only for training and service purposes Remove blockings around heat exchanger Check compressor wire disconnection Check IPM input signal connector short e Check for short circuit of PCB IPM Input Signal Connector 1 Set as the multi tester resistance measurement mode 2 Check the short circuit between the input signal pins at the IPM SPM3 lower parts in Power off state de S 2 LAJ Dy SP ECO Bi 2 5 LGE Internal Use Only 5 Trouble Shooting Verifying compressor burn Table 1 C 7 salts 1 Remove the connectors to the PCB en iene Comp 2 Measure the resistance between the lines temina OSES f each terminal of the compr r Refer oe wae GE Vv 1 040 at25 0 3 Measure the resistance between each a aie z T nesseta ain U V 1 125 at25 C terminal and the chassis pipe of the 41k VW 1 125 at25 C compressor Refer to Table 2 W U 1 125 at25 0 4 If the measurements are distinctively Table 4 SINS OE Wn Tate Hand 3c Resistance of terminal insulations compressor is decided to be burned Terre IMO 1 V chassis 1MQ 1 Verifying IPM burn W chassis 1MQ 1 1 Remove the connectors to the PCB 2 Set Multi tester as
91. lectronics Inc All right reserved 14 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls e Outdoor Category Functions Remark Reliability Defrost Deicing High pressure switch O Low pressure switch Phase protection Restart delay 3 minutes Self diagnosis Soft start Test function Convenience Network function Night Silent Operation Network solution LGAP O D X O DJ O X X X Note o Applied x Not applied Option Model name amp price are different according to options and assembled in factory with main unit Accessory model name Installed at field ordered and purchased separately by the corresponding model name sup plied with separate package 1 2 List of Accessory Device Remark Central Controller Simple Controller PQCSB101S0 Function controller Function Scheduler PQCSB101S0 PQCSC101S0 PQCSB101S0 PQCSD130A0 AC Ez PQCSZ250S0 AC Smart II PQCSW320A1E Option Kit SD card type PQCSE341A0 PQCSE342A0 ACP Advanced Control Platform AC Manager P1485 PQCPA11A0E PQCPB11A0E PQCSS520A0E PMNFP14A0 PMNFP14A1 DO Digital Output Kit PQNFPOOTO LONWORKS Gateway PQNFB16A1 Building Network Unit BACnet Gateway PQNFB17B0 Installation ODU Dry Contact Low Ambient Kit Y branch Accessory Header branch Accessory
92. measured value is different from the table PCB needs to be replaced PCB damaged PFC_IPM check U VVW RST Copyright 2012 LG Electronics Inc All right reserved 84 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting E 40 48 56k DO0000000000005 oO on i m z CJ m m m g m m m a m m m m O 0 O m m m m Ta gt Cooooo09 poood00000000 Madpodapodaor DO oO ooo al f g I E mG peas oer eee sd at RR te are TEDAN f passa Batas PERS a E T CN N _ BLUE CN L BRWON U V W CONNECTOR 1 Wait until inverter PCB DC voltage is discharged after main power off 2 Pull out CN L CN N connectors and U V W COMP Connector 3 Set multi tester to resistance mode 4 lf the value between P and N terminal of IPM is short 0Q or open hundreds MQ PCB needs to be replaced IPM damaged 5 Set the multi tester to diode mode 6 In case measured value is different from the table PCB needs to be replaced PCB damaged PFC_IPM check U V W RST Copyright 02012 LG Electronics Inc All right reserved 85 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Cause of error Check point amp Normal condition Input Over Current 27 30 40k 17A 7 48 56k 29A R WARNING 1 Malfunction of Compressor 2 Blocking of Pipe 3 Low Voltage Input 4 Refrige
93. ments are outside DC 2 5V Yes Remedy remove cause of error 0 2V the parts are decided as burned Check compressor locking e Check compressor wire disconnection open negative phase e Check inside wire open short Check inside insulation damage Is the compressor normal ETTET aan as Remedy Rearrange compressor wire disconnections Replace compressor Yes Check PCB Comp connector assembly status e Check if PCB IPM burned DC LINK Check PCB IPM input signal 7 connectors short circuit gt Refer to CH21 trouble shooting method Is the outdoor unit PCB IPM normal Yes Remedy replace PCB Assembly Is Check phase current sensing part PCB phase current voltage measurements at Power on sensing circuit part standby state U V W gt DC 2 5V normal 0 2V Yes Recheck power and installation condition Remedy replace PCB Assembly Copyright 2012 LG Electronics Inc All right reserved 68 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Cause of error Check point amp Normal condition e Overload operation Outdoor fan constraint screened blocked e Wrong application of Reactor Spec e Burned PCB internal parts PSC Module e Check outdoor fan constraint screened flow structure e Check Reactor Spec 11A 13mH e Check for PCB internal part burn Over current on AC gt DC converter
94. n 4 Check refrigerant pressure gt Reassemble or manage if abnormality found Is installation condition normal Yes Check No R S S T T R phase voltage is 400V 10 R N S N T N phase voltage is 220V 10 gt Check connection condition and wiring if power is abnormal Is input voltage normal Yes No 1 Check L N connection condition 2 Check wire disconnection and wiring gt Reassemble if abnormality found Is AC input Wire connection condition normal Yes No 1 Check inverter PCB assembly U V W connector connection condition 2 Check wire disconnection and wiring 3 Check compressor terminal connection condition bad contact gt Reassemble if abnormality found Is compressor Wire connection condition normal Yes No Is inverter PCB assembly gt Check inverter PCB assembly PFCM normality normal gt Replace inverter PCB assembly Yes Recheck power and installation condition PFCM Moudle checking method Set the multi tester to diode mode Check short between input signal pin which are placed below PFC Module 3 Replace PCB assembly if it is short between pins except No 4 5 pins s af af es Y i OOOO sO SEE caution PFCM module No 4 5 pins are internal short state lt Short Check Point gt Copyright 2012 LG Electronics Inc All right reserved 125 og LGE Internal Use Only Only for training and service purposes 5 Trouble Shoo
95. n bad connection or are not engaged Compressor Outdoor fan is stopped e Check the related circuit of RO2H 12 1K RO1H 1K RO4H 6 2K ROSH 1K CO1H 102 C02H 102 Micom pin No 4 e Check the Indoor temperature sensor is disconnected or not about 10K at 25 C Check the Relay RY PWR RY START for driving Compressor e Check the voltage between brown and blue cable of terminal to connect the Outdoor About AC220V 240V e Check the related circuit of relay in Outdoor PCB Ass y Check Point Comp ON Comp OFF Between Micom No 19 and DC 5V DC 0V GND Between ICO1M No 10 and GND DC 1V DC 12V Turn off main power Check the electrical wiring diagram of Outdoor side Check the open or short of connecting wires between Indoor and Outdoor Copyright 02012 LG Electronics Inc All right reserved 54 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 6 4 When indoor Fan does not operate Turn off main power Check the connection of CN FAN Check the Fan Motor Check the Fuse AC250V T2A Check the related circuit of indoor Fan Motor e The pin No 68 of micom and the part for driving SSR Q01M e Check the related pattern e Check the SSR SSR Open Indoor Fan Motor never operate SSR short Indoor Fan Motor always operates in case of ON or OFF Turn on the main power Check the SSR high speed operation by remote control the Indoor Fan Motor is connected
96. nd Is compressor Wire connection condition normal Yes No Check R S S T T R phase voltage is 400V 10 R N S N T N phase voltage is 220V 10 gt Check connection condition and wiring if power is abnormal No Check inverter PCB assembly IPM normality gt Replace inverter PCB assembly Is input voltage normal Yes Is inverter PCB assembly normal Yes Recheck power and installation condition Copyright 2012 LG Electronics Inc All right reserved 126 az LGE Internal Use Only Only for training and service purposes Display Cause of error code 5 Trouble Shooting Check point amp Normal condition e Overload operation Outdoor fan constraint screened blocked High temperature in Refrigerant leakage Discharge pipe of the insufficient inverter compressor Poor INV Comp Discharge sensor e LEV connector displaced poor LEV assembly R WARNING e Check outdoor fan constraint screened flow structure e Check refrigerant leakage e Check if the sensor is normal e Check the status of EEV assembly Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking No Remove blockings around heat exchanger Maintain distance between outdoor unit and the
97. ng operating in outdoor low temperature If outdoor temperature drops below certain temperature liquid back is prevented by reducing outdoor fan speed It can prevent frosting of evaporator and keep cooling operation Outdoor pipe Outdoor Setting setting Fan Speed Speed Speed 7 2 Space control Vanes angle can be controlled by pair considering its installation environment For example direct drafts can be annoying leading to r discomfort and reduced productivity vane control P 4 4 helps to eliminate this problem ME Easily controlled by wired remote control Air Flow can be controlled easily regarding any space environment 7 3 Auto Elevation Grille e Auto Elevation Grille is automatically down to height of max 3 1 m So it enables to install the Indoor unit t at high ceiling space And Auto Elevation Grille makes you cleaning the filter easily Copyright 2012 LG Electronics Inc All right reserved 31 p LGE Internal Use Only Only for training and service purposes Part 2 Functions amp Controls E ELEVATION GRILL REMOTE CONTROLLER Accessory e Main Components of Lift Grill Signal transmitter Lift grill front panel assembly Bolts for installation 4 EA P No 3A00255K Instruction manual Ascend amp Remote Controller for lift grill Descend How to Use Remote Controller pep As for operation of
98. nit Signal wire as slave e Check for event communication through the product manual GND Signal wire When controlling multiple indoor units with event communication function with one remote controller you must change the master slave setting from the indoor unit Indoor units the master slave configuration of the product after completion of indoor unit power OFF and then ON the power after 1 minutes elapsed sign up For ceiling type cassette and duct product group change the switch setting of the indoor PCB TTTTTTTT i 000000 2 3 45678 mr 3 switch OFF Master 3 switch ON Slave Factory default setting For wall mount type and stand type product change the master slave setting with the wireless remote controller Refer to wireless remote controller manual for detail NZA When installing 2 remote controllers to one indoor unit with event communication function set the master slave of the remote controller Refer to remote controller master slave selection When controlling the group some functions excluding basic operation setting fan level Min Mid Max remote controller lock setting and time setting may be limited 2 When installing more than 2 wired remote controllers to one air conditioner please connect as the right picture e When installing more than 2 units of wired remote controller to one air conditioner set one wired remote controller as master and the others all as slaves as s
99. ntermeasure Flow Chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure gt Reassemble or manage if abnormality found Is installation condition normal 1 Check resistance between each terminal of compressor 0 845 7 2 Check insulation resistance between compressor terminal and pipe over 50MQ gt Replace compressor if abnormality found Are the resistance Between each phase and insulation resistance of Inverter compressor normal 1 Check inverter PCB assembly U V W connector connection condition Is compressor 2 Check wire disconnection and wiring Wire connection 3 Check compressor terminal connection condition condition normal bad contact gt Reassemble if abnormality found Check inverter PCB assembly IPM normality Replace inverter PCB assembly Is inverter PCB assembly normal Yes Recheck power and installation condition E Comp checking method Comp Resistance Q at 20 C Terminal Inverter comp 0 845 at 25 C 0 859 at 25 C 0 864 at 25 C Resistance Q at 20 C Terminal Inverter comp U GND 50M V GND 50M W GND 50M Copyright 2012 LG Electronics Inc All right reserved 117 az LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting
100. ondition e Defective low pressure sensor e Defective outdoor indoor unit fan Refrigerant shortage leakage e Deformation because of damage of refrigerant pipe e Defective indoor outdoor unit EEV Excessive decrease of low 35 Low Presser Error e Covering clogging outdoor unit covering during pressure Np the cooling mode indoor unit filter clogging dur ing heating mode e SVC valve clogging e Defective outdoor unit PCB e Defective indoor unit pipe sensor E Error diagnosis and countermeasure flow chart Is service valve opened Open service valve Yes check communication piping correction Are communication cable piping normal Yes Is amount of refrigerant normal refer refrigerant part No Is there pipe crack or trace of refrigerant leakage Adjust the amount of refrigerant Additive charge Yes Yes Weld reconnect the cracked portion and recharge refrigerant Is fan normal in heating outdoor fan in cooling indoor fan No Check and replace related parts error 105 108 reference Yes No Is strainer Ok Replace the strainer Yes Are the values of manifold and low pressure sensor same Is the low pressure value actually low No Replace the pressure sensor Yes If the temperature difference between inlet and outlet of strainer is so large that frost or ice formation can be seen or confirmed then clogging of strainer should be
101. onnector condition Yes Me Change abnomal motor Is Fan motor nomal Yes Replace inverter PCB assembly 18 2 _ pr lt fan motor middle connection gt lt FAN Motor Connection check gt Check Point 1 Check error code again after replacing the abnormal part Fan Motor or PCB first Copyright 02012 LG Electronics Inc All right reserved 137 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Cause of error Check point amp Normal condition 1 Overload operation Pipe clogging Covering EEV defect Ref overcharge 2 Compressor damage Insulation damage Motor damage 3 Input voltage abnormal L N 4 Power line assemble condition abnormal 5 Inverter PCB assembly damage input current sensing part AC input instant over cur Inverter PCB input power rent error current is over 48A peak Matter of software for 2ms E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Qutdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure gt Reassemble or manage if abnormality found Is installation condition normal Check R S S T T R phase voltage is 400V 10 R N S N T N phase voltage is 220V 10 gt Check connection condition and wiring if power is abnormal Is input voltage normal 1 Check L N connection condition Is AC input Wire conn
102. p Normal condition Overload operation Pipe clogging Covering EEV defect Ref overcharge Compressor damage Insulation damage Motor damage Input voltage abnormal L N Power line assemble condition abnormal Inverter PCB assembly Damage input current sensing part Inverter PCB input current is over100A peak for 2us AC Input Instant over Current Error R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion No 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure gt Reassemble or manage if abnormality found Is installation condition normal Yes No Check L N phase voltage is 230V 15 gt Check connection condition and wiring if power is abnormal Is input voltage normal Yes No 1 Check L N connection condition 2 Check wire disconnection and wiring gt Reassemble if abnormality found Is AC input Wire connection condition normal Yes No 1 Check inverter PCB assembly U V W connector connection condition Is compressor ee 2 Check wire disconnection and wiring Wire connection a i 3 Check comp
103. poses LGE Internal Use Only 4 Test Run 3 3 Ceiling Cassette Type 3 3 1 PRECAUTIONS IN TEST RUN The initial power supply must provide at least 90 of the rated voltage Otherwise the air conditioner should not be operated CAUTION For test run carry out the cooling operation first even during winter season If heating operation is carried out first it leads to the trouble of compressor Carry out the test run more than 5 minutes without stopping Test run will be cancelled 18 minutes later automatically The test run is started by pressing the room temperature checking button and down timer button for 3 seconds at the same time To cancel the test run press any button 3 3 2 CHECK THE FOLLOWING ITEMS WHEN INSTALLATION IS COMPLETE After completing work be sure to measure and record trial run properties and store measured data etc e Measuring data are room temperature outside temperature suction temperature blow out temperature air velocity air volume voltage current presence of abnormal vibration and noise operating pressure piping temperature As to the structure and appearance check following items id Is the circulation of air adequate L Does the romote controller works properly L Is the drainage OK L Is there any error on wiring Ld Is the heat insulation complete L Aren t terminal screws loosened refrigerant and drain piping L Is there any leakage of refrigerant M4 118N cm
104. power communication lines Is the lt grounding connection status gt normal aA Yes Remedy connect grounding and remove cause of error Is outdoor e Check the status of outdoor unit unit communication communication connector assembly NS circuit normal p e Check the status of outdoor unit power NS JP connector assembly Yes Remedy reconnect connectors replace PCB Assembly Recheck power and installation condition Copyright 02012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting eid Title Cause of error Check point amp Normal condition e Outdoor unit PCB Incorrect checksum of out EEPROM misapplied 60 Joor unit PCB EEPROM Outdoor unit PCB EN EEPROM poor assmbly R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check if EEPROM is missing Is the EEPROM properly Check the status of the EEPROM assembled assembly Yes Remedy reassemble EEPROM Replace PCB Assembly e Inspecting Outdoor EEPROM Assembly Status 1 Check the consistency of the EEPROM s direction inserted in the PCB and the EEPROM marking Ez o JIA gro ed EE SEYOMOR
105. r No e Check refrigerant leakage Supply refrigerant if not enough refrigerant Is there enough ODS refrigerant gt Remedy Treat the leakage point Supply additional refrigerant Yes e Check the status of PCB CN EEV1 assembly e Check the status of EEV assembly e Check PCB IPM input signal connectors short circuit gt Refer to CH21 trouble shooting method No Is the EEV properly DS assembled aAA Yes No Ccheck the sensor assembly status Is the inverter compressor e Check if the sensor is burned NS sensor normal measure resistance gt 200K0 10 25 C basis Yes Replace the Thermistor Copyright 2012 LG Electronics Inc All right reserved 1 Only for training and service purposes Remedy LEV assembly replacement Inspecting Inverter Compressor Discharge Sensor 1 Set Multi tester as resistance measurement mode 2 Measure the resistance between inverter discharge sensor connector pins 3 Measure resistance value of 200KQ 10 25 C basis 4 Check if the sensor insulation is damaged gt measure the resistance between sensor connector pin and unit assembly pipe 1MQ or more H CN DISCHARGE BLACK 3Pin Connector LGE Internal Use Only 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition e Defective low pressure sensor e Defective outdoor indoor unit fan Refrig
106. r setup it automatically gets out of setup mode if there is no button input for 25 seconds When exiting without pressing set button the manipulated value is not reflected lt Ceiling Height Selection Table gt Ceiling Height Level Description Low Decrease the indoor airflow rate 1 step from standard level Medium Set the indoor airflow rate as standard level High Increase indoor airflow rate 1 step from standard level 04 Very high Increase indoor airflow rate 2 steps from standard level e Ceiling height setting is available only for some products e Ceiling height of Very high function may not exist depending on the indoor unit e Refer to the product manual for more details Copyright 2012 LG Electronics Inc All right reserved 22 az LGE Internal Use Only Only for training and service purposes Part 2 Functions amp Controls 5 Reliability f 5 1 Hot start e When heating is started the indoor fan is stopped or very slow to prevent the cold air carry out When the temp of heat exchanger reach 30 C model by model indoor fan is started 5 2 Self diagnosis Function e The air conditioner installed can self diagnosed its error status and then transmits the result to the central control Therefore a rapid countermeasure against failure of the air conditioner allows easy management and increases the usage life of air conditioner e Refer to trouble shooting guide 5 3 Soft
107. rant Pipe length Blocked Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart Is installation condition normal Are the resistance Between each phase and insulation resistance of Inverter compressor normal No Yes Is compressor Wire connection condition normal No Yes Is inverter PCB assembly No power connection normal Yes No Is input voltage normal Yes Is inverter PCB assembly No normal Yes Recheck power and installation condition Copyright 02012 LG Electronics Inc All right reserved Only for training and service purposes 1 Check Pipe clogging distortion 2 Check Covering Indoor Qutdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure Reassemble or manage if abnormality found 1 Check resistance between each terminal of compressor 0 438 0 628 7 2 Check insulation resistance between compressor terminal and pipe over 2MQ Replace compressor if abnormality found 1 Check inverter PCB assembly U V W connector connection condition 2 Check wire disconnection and wiring 3 Check compressor terminal connection condition bad
108. ressor terminal connection condition bad contact condition normal gt Reassemble if abnormality found Yes No Is inverter PCB assembly N Check inverter PCB assembly PFCM normality normal gt Replace inverter PCB assembly Yes Recheck power and installation condition PFCM Moudle checking method Set the multi tester to diode mode Check short between input signal pin which are placed below PFC Module 3 Replace PCB assembly if it is short between pins except No 4 5 pins caution PFCM module No 4 5 pins are internal short state cases es Y i OOOO sO SEE lt Short Check Point gt Copyright 2012 LG Electronics Inc All right reserved 94 og LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting Display code Cause of error Check point amp Normal condition 1 Overload operation Pipe clogging Covering EEV defect Ref over charge 2 Compressor damage Insulation damage Motor damage 3 Input voltage low 4 ODU inverter PCB assembly damage Inverter compressor over Inverter compressor input current current is over 30A R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Cha
109. rgency conditions e Compressor turned off when intake air temperature is in between 0 5 C of the setting temp limit for three minutes continuously intake air temperature reaches below 1 0 C of the temperature of setting temp e Compressors three minutes time delay After compressor off the compressor can restart minimum 3 minutes later 6 1 2 Heating Mode e Operating frequency of compressor depend on the load condition The difference between the room temp and set temp frequency restrictions If compressor operates at some frequency the operating frequency of compressor cannot be changed within 30 sec onds e Condition of compressor turned off When intake air temperature reaches 4 C above the setting temperature e Condition of compressor turned on When intake air temperature reaches 2 C above the setting temperature Condition of indoor fan turned off While in compressor on indoor pipe temp lt 20 C While in compressor off indoor pipe temp lt 30 C e While in defrost control between the indoor and outdoor fans are turned off e Compressor 2minutes delay After compressor off the compressor can restart minimum 2 minutes later NOTE Some Models are different by temperature of thermo ON OFF CST Duct CVT type indoor unit matched with Single Outdoor unit Multi Outdoor unit Multi V Outdoor unit CST Duct CVT type indoor unit matched with Universal Outdoor unit Thermo ON 2 C
110. rposes LGE Internal Use Only 5 Trouble Shooting 24 27 30k PFCM Measuring resistance between No 19 20 pin 40 48 56k ee ee oe LEE PFCM IPM Measuring resistance Measuring resistance between No 19 20 pin between No 24 25 pin Copyright 2012 LG Electronics Inc All right reserved 109 og LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting Display code Cause of error Check point amp Normal condition 1 ODU fan locking ed Inverter PCB heatsink Dea pene SHINE Persen de ene eon sensor is open or short er 3 Defect of temperature sensing circuit part defect of INV PCB E Error Diagnosis and Countermeasure Flow Chart 1 Check fan locking 2 Check covering of heat exchanger Is installation 3 Check distance between ODU and obstacles condition normal 4 Check pipe distortion and abnormality 5 Check service valve is opened Eliminate causes for abnormal condition Is assemble condition Check assemble condition between INV PCB heatsink and of INV PCB heatsink normal PFC amp IPM module gt Reassemble if abnormality found Check resistance between NO 19 pin and NO 20 pin of PFC module Is PCB temperature Check resistance between NO 24 pin and NO 25 pin sensing part normal of PFC module gt 7KQ 10 at 25 C gt Replace PCB if abnormality found Yes Recheck installation condition and connection of Heat sin
111. rt 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure gt Reassemble or manage if abnormality found Is installation condition normal 1 Check resistance between each terminal of compressor 0 438 0 628 7 2 Check insulation resistance between compressor terminal and pipe over 2MQ Are the resistance Between each phase and insulation resistance of Inverter compressor normal No gt Replace compressor if abnormality found Yes 1 Check inverter PCB assembly U V W connector connection condition No 2 Check wire disconnection and wiring 3 Check compressor terminal connection condition bad contact gt Reassemble if abnormality found Is compressor Wire connection condition normal Yes No Check L N phase is 230V 15 Check connection condition and wiring if power is abnormal No Check inverter PCB assembly IPM normality Replace inverter PCB assembly Is input voltage normal Yes Is inverter PCB assembly normal Yes Recheck power and installation condition Copyright 2012 LG Electronics Inc All right reserved 95 az LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting Display Cause of error code Check point amp Normal condition e Overload operation Outdoor fan constraint
112. rt circuits with other parts E Error Diagnosis and Countermeasure Flow Chart No Is input voltage normal Check LAN Voltage is 230V 15 Yes No Is Inverter PCB assembly Check connection from terminal block to Power connection normal Inverter PCB assembly CN L CN N Yes No Is Inverter PCB Normal Replace inverter PCB assembly Recheck power and installation condition Copyright 02012 LG Electronics Inc All right reserved 88 az LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting Check Point 1 Check the WCN_P L P N Connection condition at the Main PCB Refer to outdoor wiring diagram 2 Check the DC Link voltage at not operating 280V 3 Check the DC Link voltage at Comp operating 340V 4 Check DC Link Sensing Signal 2 4 2 8V Refer the Picture E 24 27 30k tt s ul EF Ril a H pA gt ie r reer Wala EE a A imi A s E ELIA ea vil GND Red Black Vdc lt CT Sensing Check Point gt Copyright 2012 LG Electronics Inc All right reserved 89 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 40 48 56k lt Inverter PCB gt lt DC Link Voltage Check Point gt lt Connection Check Point gt lt DC_LINK Sensing Check Point gt Copyright 2012 LG Electronics Inc All right reserved 90 Only for training and service purposes LGE In
113. s and child lock function is setup if If moving to setup icon area by using button 3 cancelled Press button to exit After setup it automatically gets out of setup mode if there is no button input for 25 seconds s When exiting without pressing set button the manipulated value is not reflected 6 6 Forced operation To operate the appliance by force in case when the remote control is lost the forced operation selection switch is on the main unit of the appliance and operate the appliance in the standard conditions e The operating condition is set according to the outdoor temp and intake air temperature as follows Setting speed of Indoor temp Operating Mode Setting temp indoor fan over 24 C Cooling 22 C 21 24 C Healthy Dehumidification 23 C High speed The unit select the last operation mode in 3 hours e Operating procedures when the remote control can t be used is as follows The operation will be started if the ON OFF button is pressed If you want to stop operation re press the button Copyright 02012 LG Electronics Inc All right reserved 27 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 6 7 Group Control 1 When installing more than 2 units of air conditioner to one wired remote controller please connect as the right figure e If it is not event communication indoor unit set the u
114. s LGE Internal Use Only Display code Cause of error 5 Trouble Shooting Check point amp Normal condition Title Communication Indoor gt Outdoor Check Point 1 Check the input power AC230V Outdoor Indoor unit 2 Check the communication wires are correctly connected Adjust the connection of wire Confirm the wire of Live Neutral 3 Check the resistance between communication line and GND Normal Over 2MQ 4 Check the connector for communication is correctly con nected 5 If one indoor unit is operated normally outdoor PCB is no problem Check the another indoor unit CHO5 is displayed at indoor unit CH53 is displayed at outdoor unit 6 If all indoor unit is displayed CH05 but outdoor PCB not display 1 In Case of CHO5 Check the Connection gt CN POWER CN COMM at the Main PCB gt CN MAIN at the Noise Filter 2 In Case of CH53 Check the Connection CN COMM at the Main PCB gt CN MAIN COMM CN AC 220V at the Inverter PCB gt CN INVERTER at the Noise Filter Copyright 2012 LG Electronics Inc All right reserved 133 Only for training and service purposes e Communication poorly 2 Lom No conma e Power input AC 220V Outdoor Indoor The connector for transmission is disconnected e The connecting wires are misconnected The communication line is shorted at GND e Transmission circuit of outdoor PCB is abnormal Transmission circuit of indoor PCB i
115. s abnormal gt Se ed GT ll z CEF h Ay r TIK GT CR if Pye i r i i z ae E MAD s N a lt MAIN PCB gt a ait All cn MG vn i 1 H un Jea n BGN gi je AVAN COMM PI am lt INVERTER PCB gt LGE Internal Use Only 5 Trouble Shooting Display code Cause of error Check point amp Normal condition 3 phase wrong wiring of Abnormal Main PCB outdoor unit Reverse No connection of CN Phase Phase omission of e Changed R S T connection order phase 3 phase wrong wiring of main outdoor unit E Error Diagnosis and Countermeasure Flow Chart 1 Check the Connection condition of PCBs No 1 Input amp Output R S T N wire Connection of Noise Filter 2 Check reverse connecting and non connecting for CN L1 R CN L2 S CN L3 T of the Inverter PCB Yes 3 Check the CN AC 220V Connector of the Inverter PCB and T N connector of the Noise Filter No 2 Check the connection or damage of power source fuses Is PCB connection Normal Is input voltage normal Yes R S S T T R phase voltage is 380V 10 R N S N T N phase voltage is 220V 10 Recheck power and installation condition Check connection condition and wiring if power is abnormal Fuse lt INVERTER PCB Connection Check gt Copyright 2012 LG Electronics Inc All right reserved 134 p LGE Internal Use Only Only for training and service purpos
116. s gas generates A case of leakage of the refriger ant and the closed room full with gas is dangerous because a shortage of oxygen occurs Be sure to execute ventilation When removing the front panel or cabinet execute short circuit and discharge between high voltage capacitor terminals If discharge is not executed an electric shock is caused by high voltage resulted in a death or injury Do not turn the air conditioner ON or OFF by plugging or unplugging the power plug There is risk of fire or electrical shock Copyright 2012 LG Electronics Inc All right reserved 3 p LGE Internal Use Only Only for training and service purposes Part 1 General Information Do not use a defective or underrated circuit breaker Use the correctly rated breaker and fuse Otherwise there is a risk of fire or electric shock Install the panel and the cover of control box securely Otherwise there is risk of fire or electric shock due to dust water etc Indoor outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no force pulling the cable from the connection terminals Improper or loose connections can cause heat generation or fire Do not touch operate or repaire the product with wet hands Hoding the plug by hand when taking out Otherwise there is risk of electric shock or fire Use a vacuum pump or Inert nitrogen gas when doing leakage test or air purge Do not compress
117. se Only 6 7 Troubleshooting Outdoor Error 5 Trouble Shooting gt A2UW14GFA0 A2UW16GFA0 A3UW18GFA0 A3JUW21GFA0 Displa gs pea Title Cause of error Check point amp Normal condition e Compressor blocked ___ Check compressor constraint e Disconnection shortcircuit l er e Check compressor wire open short l l inside compressor l l High current into the e Check compressor insulation damage 21 Over load operation compressor Outdoor fan constraint screened blocked e Burned parts inside PCB e Check outdoor fan constraint screened flow structure e Check if IPM burned Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check Fan constraint Maintain distance between outdoor unit and the wall Check pipe folding and abnormality Check service valve lock Is the unit installed properly Yes Remedy remove the cause of error e Check compressor constraint Is the Compressor 4 open negative phase ormal Check inside wire open short Check inside insulation damage Remedy Rearrange compressor wire disconnections Replace compressor Yes Check PCB compressor connector assembly status Check if PCB IPM burned Circuit Check the ba
118. selected by Fuzzy rule when the intake air temp is 0 5 C or more below the set ting temp the compressor is turned off When 0 5 C or more above the setting temp the compressor is turned on Compressor ON Temp gt Setting Temp 0 5 C Compressor OFF Temp gt Setting Temp 0 5 C At the beginning of Fuzzy mode operation the setting temperature is automatically selected according to the intake air temp at that time 26 C lt Intake Air Temp gt 25 C 24 C lt Intake Air Temp lt 26 C gt Intake Air Temp 1 C 22 C lt Intake Air Temp lt 24 C gt Intake Air Temp 0 5 C 18 C lt Intake Air Temp lt 22 C gt Intake Air Temp Intake Air Temp lt 18 C gt 18 C e When the Fuzzy key Temperature Control key is input after the initial setting temperature is selected the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically accord ing to the Fuzzy rule e While in Fuzzy operation the airflow speed of the indoor fan repeats the low airflow speed or pause as in dehumidifica tion operation 6 3 3 Fuzzy Operation for Heating According to the setting temperature selected by Fuzzy rule when the intake air temp is 3 C or more above the setting temp the compressor is turned off When below the setting temp the compressor is turned on Compressor ON Temp gt Setting Temp Compressor OFF Temp gt Setting Temp 3 C At the beginning of Fuzzy mode operation th
119. splay Libero R Libero E Cooling Cooling 1 degrees 1 degrees Heating Heating 10 degrees 10 degrees Plasma Preheating The number of times to blink Error code Error Indicator Preheating 5 Trouble Shooting Artcool Mirror 1 degrees 10 degrees The function is to self diagnoisis airconditioner and express the troubles identifically if there is any trouble Error mark is ON OFF for the operation LED of evaporator body in the same manner as the following table If more than two troubles occur simultaneously primarily the highest trouble fo error code is expressed After error occurrence if error is released error LED is also released simultaneously To operate again on the occurrence of error code be sure to turn off the power and then turn on e Having or not of error code is different from Model Indoor Error Error code Description No Error Indoor Status Indoor Room themistor error Remote controller error OFF Indoor in piping sensor error Drain Pump error Communcation error between in and out Indoor Out Piping sensor error Differnt mode operation EEPROM Check Sum Error 00 03 04 05 06 07 09 Indoor BLDC Fan Lock Copyright 02012 LG Electronics Inc All right reserved Only for training and service purposes 45 2 LGE Internal Use Only 5 Trouble Shooting 1 3 Error Indicator Outdoor Outdoor Error Ex Error 21 DC Pe
120. static pressure by pressing button 01 V H 02 F H 03 V L 04 F L LILI 4 shee Function Code Pressure vd Press button to save and Pressing button will exit settings mode After setup it automatically gets out of setup mode if there is no button input for 25 seconds s When exiting without pressing set button the manipulated value is not reflected lt Static Pressure Setting Table gt Pressure selection Function ESP standard value 01 Variable High 02 Fixed High 03 Variable Low Copyright 2012 LG Electronics Inc All right reserved 19 Eg LGE Internal Use Only Only for training and service purposes Part 2 Functions amp Controls This is the function that decides the strength of the wind for each wind level and because this function is to make the installation easier If you set ESP incorrectly the air conditioner may malfunction This setting must be carried out by a certificated technician 1 If pressing 27 button long for 3 seconds it enters into remote controller setter setup mode If pressing once shortly it enters into user setup mode Please press more than 3 seconds for sure 2 If entering into ESP setup mode by using button it indicates as the picture below Function Code ESP value 3 Select ESP fan step by pressing button 01 very low 02 low 03 medium 04 high 05 very high I
121. t gt Check Point 1 Check the EEPROM Direction 2 If the EEPROM value amp the Program value are not matched the Code is Displayed 3 After Checking the connection and Insertion replace the PCB or Option PCB Copyright 2012 LG Electronics Inc All right reserved 61 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition 10 Indoor BLDC Fan Motor The Fan is not operated Lock properly Check the Indoor fan locking Yellow White Blue Black Red Fan motor connector Tester Check Point Check the PCB during the Power on 1 Check the Voltage Red line to Black line The Voltage is about input voltage x 1 414 gt if the Voltage does not come with the above Voltage Check the power input gt Replace the PCB amp Motor 2 Check the Voltage Black line to White the Voltage is DC 15V Check the Power input gt Replace the motor Check the Motor 1 Check the shaft gt if the shaft is not turn smoothly the Motor Power IC is defected replace the motor 2 Check the motor resistance if the shaft is turn smoothly check the resistance Check Red line to Black line Blue line to Black line gt The resistance should infinite replace the motor Copyright 2012 LG Electronics Inc All right reserved 62 Only for training and service purposes LGE Internal U
122. ter 4 Check the volt Of Drain pump power supply AC 230V gt Repair or Change the main PCB Copyright 2012 LG Electronics Inc All right reserved 59 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Cause of error Check point amp Normal condition e One of Indoor Unit oper 07 Different Operation Mode ate cooling Another Unit operate heating At the same time this model cannot use cool and heating mode fa OOS gt loft c Swill AA s A fE 6 GES Ul T PLASMA E SAVING A CLEAN OOO NT TEP SEO mI av ROOM SWING J SWING TEMP TIMER C FISSEC SLEEP OFF G Ea a ee LIGHT TIME 3SEC LG Check Point 1 Check another indoor model operation mode 2 Operating the same mode with the first operated indoor unit 3 Clearing the CHO7 Press the on off button or mode change button and matching the indoor unit mode same as the first operated indoor unit Copyright 2012 LG Electronics Inc All right reserved 60 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition 09 Indoor EEPROM Check 1 Check the poor soldering Sum Error Check sum error 2 Check the insertion condition of the EEPROM 3 Check the PCB Connection lt EEPROM Direction Check Poin
123. ternal Use Only 5 Trouble Shooting Display code Cause of error Check point amp Normal condition e Abnormal Input voltage Check the power source 140Vac 300Vac e Check the components Input voltage E Error Diagnosis and Countermeasure Flow Chart Is input voltage normal Check LAN Voltage is 230V 15 Is Inverter PCB Normal Replace inverter PCB assembly Yes Recheck power and installation condition Check Point 1 Check the Input Voltage L N gt 230V 10 2 Check Input Voltage Sensor output voltage 2 5Vdc 10 lt Input Power Source Check Point gt Copyright 02012 LG Electronics Inc All right reserved 91 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting gt 24 27 30k er ar eh koa bok fob z 5 Red Black Vdc lt CT Sensing Check Point gt gt 40 48 56k lt Inverter PCB gt lt Input Voltage Sensing Check Point gt Copyright 2012 LG Electronics Inc All right reserved 92 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Title Cause of error Check point amp Normal condition e Check the connection of comp wire U V W e Malfunction of compressor e Check the component of IPM detection parts DC Compressor e Compressor Position Starting fail error R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes
124. the Inverter PCB No Check the input voltage source Is nomal the offset of R NT N voltage Is CT Sensor Output is right Yes Is input voltage normal Yes Recheck the Inverter PCB and installation condition ICOIG ACS754SCB 050 C input Current R PFC Input Current R INV CT Sensor Output at the INVERTER PCB 2012 COMP Pees f FEE TA uyw iii osat 1 rece aani lt INVERTER PCB gt lt INPUT VOLTAGE Check Point gt Copyright 2012 LG Electronics Inc All right reserved 130 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Display code Title Cause of error Check point amp Normal condition e Open Short 41 D pipe sensor Inverter Soldered poorly Normal resistor 200KQ at 25 C Unplugged Internal circuit error e Bad connection of connector PCB e Bad connection high pressure connector e Defect of high pressure connector Open Short e Defect of connector PCB Open Short e Defect of outdoor main PCB Sensor error of high Abnormal value of sensor pressure Open Short e Open Short Air sensor e Soldered poorly e Normal resistor 10KQ at 25 C Unplugged Internal circuit error Open Short e Soldered poorly e Normal resistor SKO at 25 C Unplugged Internal circuit error e Open Short Suction Pipe sensor e Soldered poorly e Normal resistor 5KQ at
125. the airflow mode is operated for 2 15 sec randomly by the Chaos Simulation 2 6 Jet Cool Mode Operation e While in heating mode or Fuzzy operation the Jet Cool key cannot be input When it is input while in the other mode operation cooling dehumidification ventilation the Jet Cool mode is operat ed In the Jet Cool mode the indoor fan is operated at super high speed for 30 min at cooling mode operation In the Jet Cool mode operation the room temperature is controlled to the setting temperature 18 C e When the sleep timer mode is input while in the Jet Cool mode operation the Jet Cool mode has the priority e 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 2 7 Swirl wind Swing Vane 2 It is the function for comfort cooling heating operation The diagonal two louvers are opened the more larger than the other louvers After one minute it is opposite Vane 1 Vane 3 Vane 4 e Comparison of Air Flow Types 4 Open conventional Swirl Swing New Vane 1 Open Vane 1 Close Open Vane 2 Open Vane 2 Open Close Vane 3 Open Vane 3 Close Open Vane 4 Open Vane 4 Open Close Time Time Copyright 02012 LG Electronics Inc All right reserved 17 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp
126. ting Display code Cause of error Check point amp Normal condition 1 Overload operation Pipe clogging Covering EEV defect Ref over charge 2 Compressor damage Insulation damage Motor damage 3 Input voltage low 4 ODU inverter PCB assembly damage Inverter compressor over Inverter compressor input current current is over 30A R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts E Error Diagnosis and Countermeasure Flow Chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure gt Reassemble or manage if abnormality found Is installation condition normal 1 Check resistance between each terminal of compressor 0 438 0 628 7 2 Check insulation resistance between compressor terminal and pipe over 2MQ Are the resistance Between each phase and insulation resistance of Inverter compressor normal No gt Replace compressor if abnormality found Yes 1 Check inverter PCB assembly U V W connector connection condition No 2 Check wire disconnection and wiring 3 Check compressor terminal connection condition bad contact gt Reassemble if abnormality fou
127. urrent sensing circuit parts e Check compressor locking e Compressor wire open short e Check compressor insulation damage e Check outdoor fan constraint screened flow structure e Check if IMP burned refer to CH21 e Check on PCB current sensing circuit parts Over current at the initial operation of the compres sor location sensing sig nal for compressor opera tion is not input R WARNING Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting PCB phase current sensing circuit Check fan locking 1 Set Multi tester as DC voltage measurement e Remove blockings around heat mode No exchanger eee 2 Measure at the below measuring point DC outdoor unit and the wall voltages at Power on standby state Check pipe folding and 3 If the measurements are outside DC 2 5V abnormality 0 2V the parts are decided as burned e Check service valve lock Is the unit properly installed Yes Remedy remove cause of error Nu ae SV sa ongnie aan Check compressor locking No Check compressor wire disconnection open negative phase e Check inside insulation damage Is the compressor normal TE Remedy Rearrange compressor wire disconnections Replace compressor
128. wall e Check pipe folding and abnormality e Check service valve lock Is the unit properly N installed 2 Yes Remedy remove cause of error No e Check refrigerant leakage Supply refrigerant if not enough refrigerant Is there enough Nr refrigerant PP Yes Remedy Treat the leakage point Supply additional refrigerant Check the status of PCB CN EEV1 assembly Check the status of EEV assembly Check PCB IPM input signal connectors short circuit gt Refer to CH21 trouble shooting method No Is the EEV properly DS assembled aA Yes No Ccheck the sensor assembly status e Check if the sensor is burned lt lt ls the inverter compressor gt se sensor normal measure resistance gt 200KQ 10 25 C basis Copyright 2012 LG Electronics Inc All right reserved 127 Only for training and service purposes Inspecting Inverter Compressor Discharge Sensor Set Multi tester as resistance measurement mode 2 Measure the resistance between inverter discharge sensor connector pins 3 Measure resistance value of 200KQ 10 25 C basis 4 Check if the sensor insulation is damaged gt measure the resistance between sensor connector pin and unit assembly pipe 1MQ or more i CN DISCHARGE BLACK 3Pin Connector LGE Internal Use Only 5 Trouble Shooting Display code Title Cause of error Check point amp Normal c
129. ween each phase and insulation resistance of Inverter compressor normal 1 Check inverter PCB assembly U V W connector connection condition Is compressor 2 Check wire disconnection and wiring Wire a 3 Check compressor terminal connection condition condition normal bad contact Reassemble if abnormality found Check inverter PCB assembly IPM normality gt Replace inverter PCB assembly Resistance Q Model F Terminal Inverter Comp U V 0 628 at 25 C 24k 27k I 30k 0 628 at 25 C l I W U 10 628 at 25 C E Comp checking method Er 0 438 at 25 C DW JI 40k 48k 58k V W 0 438 at 25 C W U 0 438 at 25 C Resistance Q at 20 C Inverter Constant Is inverter PCB assembly normal Recheck power and installation condition Terminal comp comp U GND 2MQ 2MQ V GND 2MQ W GND 2MQ Copyright 2012 LG Electronics Inc All right reserved az LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting E 24 27 30k P U V W Nu Nv Nw GREG A I MGrere 2 26 25 24 SPM3 D 23 22 21 1 Wait until inverter PCB DC voltage is discharged after main power off 2 Pull out V V W COMP connector 3 Set multi tester to resistance mode 4 If the value between P and N terminal of IPM is short 0Q or open hundreds MQ PCB needs to be replaced IPM damaged 5 Set the multi tester to diode mode 6 In case
130. wer source 200 240V 2 Check the fan operation is right 3 Check the current 4 Check the install condition 5 Check the CT Sensor Output signal Check output pin 1 2 of the CT Sensor 5V ICO1G AGS 7545CB 050 C Input Current R PFC Input Current R INV CT Sensor Output at the INVERTER PCB AV l 2012 Copyright 2012 LG Electronics Inc All right reserved 120 LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting Display code Cause of error Check point amp Normal condition e DC Link Voltage is e Check point amp Normal condition above 780Vdc e Check the TAB1 is connect e DC Link Voltage is At not operating DC Link voltage 260V below 300Vdc e At Comp operating DC Link voltage 500V DC Link High Low Volt E Error Diagnosis and Countermeasure Flow Chart Is DC Link voltage Check the DC link Voltage AD Input of Inverter PCB under 380V If AD Input is strange change the Inverter PCB refer the next page R S S T T R phase voltage is 400V 10 No R N S N T N phase voltage is 220V 10 Check connection condition and wiring if power is abnormal Is input voltage normal Yes No Check connection from terminal block to Inverter PCB assembly CN_L1 R CN_L2 S CN_L3 T Is Inverter PCB assembly Power connection normal Yes Replace inverter PCB assembly Is Inverter PCB Normal
Download Pdf Manuals
Related Search
Related Contents
Netgear SC101 User's Manual Manual de instruções Samsung HT-DS1000 Manual de Usuario Catalogo Bandit 1250 S ABS InnengerÄt INVERTER SYSTEM do Manual User Manual Modification sur chantier du système de fin de course Climadiff CLPP182 Copyright © All rights reserved.
Failed to retrieve file