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Trouble Shooting Guide Book

1. 57 5 0 CN CN CN Td CN N N TIANA 57 OINI ON SE TITI SE LOT LO LO LO LO AAA A ojo ojo 00 tio 57 o lt y LO uum o Lio lt OINI LO LO LO LO LO LO LO LO LA LO IN PIR mix NIT SE 9
2. In order to check transmission no rei Sa ea Ee o cables between outdoor units 3 check in order as below 9 PCB connectors T P IT JT T m terminal block Mapex H AAA gt transmission cables e D o 3 Come e Dij o t 5 o Tale care phage sequence ol dare poza sy iier Press the red button for auto addressing 87 90432 913 97 D Plus 52 Plus 11 521 522 523 524 Right 2 CES receive signal from 2 Defect of outdoor Main fuse Noise Filter 52 Comp inverter controller 3 Defect of outdoor Main inverter PCB N2 Left 52 Comp Error diagnosis and countermeasure flow chart Main controller can t 1 Power cable or transmission cable is not connected Is transmission LED Yellow of inverter compressor PCB on Yes No Is noise filter or fuse normal No TS Replace noise filter or fuse Replace inverter compressor PCB Is transmission cable Re connect transmission cable connected correctly Yes Yes Is MAIN PCB normal No Replace MAIN PCB Yes Replace inverter compressor PCB The method of checking MAIN PCB and inverter compressor PCB If normal transmission LED blinks Refer electrical component part for Multi V Space Transmission connector amp LED in inverter compressor PCB Transmission connector amp LED in MAIN P
3. lt 57 OINI OO 57 NI NINININI NI NIN NI NINININI NI NINININI NININ 0 JO JO AO JO SE TIANA O O O TINI NINININININI NINI NINI NINI NINI NI NINI NINININI NINININI eal bd bau bau bal baw NIN 20 T FLOOR OID TIO OLR CO OS IN A
4. Capes component part E e o Replace MAIN PCB 5 Sub unit PCB S LED S 7 6 40 sec later after power input LED1 blinking Display normal micom condition LED2 3 On Back up for left right compressor LED4 reserved LED5 blinking Communicate with main LED6 On Reverse connection at sub unit LED7 On Right compressor is in operation LED8 On Left compressor is in operation 111 Is transmission cable installed normally Connect transmission cable e Error diagnosis and countermeasure flow chart Plus II rf O 9 9 5 o 0 5 o Is Slave Unit Dip SW setting done Dip SW setting Is main PCB power supplied Connect power cable Replace main PCB Slave Unit Dip SW Slave1 123 4 5 6 7 8 9 10 11 12 13 14 Slave2 123 4 5 6 7 8 9 10 11 12 13 14 Slaves 123 4 5 6 7 8 9 10 11 12 13 14 112 Plus 1 Loose connection of transmission cables Plus Transmission error Plus Transmission error between 2 Transmission cables are open sort between outdoor unit Main PCB outdoor PCB and fan 3 Outdoor Main PCB defect and fan Main PCB Fan outdoor main 4 Fan Main PCB defect Plus 105 Plus II 11 051 11 52 11 53 11 54 Hed 21529 Plus II Transmission error Plus Transmission error between Plus II between outdoor unit Inv PCB outdoor Inv P
5. 10 aping Bunooysa qnol 1291439913 O 5 5 2 2 493y9 uonnjos suonounj 159 97 3 5 How to check other electric components a Plus Name Display Value of main PCB in outdoor unit Check Loc Outdoor unit main PCB display Value At the moment that power is supplied Outdoor sub unit PCB display Value When power is supplied display condition Main PCB Sub PCB n 6 0 47 Hue i NY NA w 4 iy a 4 E Y a 1 164 Check points 5 sec later after power input 4X Main model name 50 Subi when connected 50 Sub2 when connected XX Total operation capacity in Hp Ex 20 Hp gt 20 25 Normal state Others PCB checking mode 22 In case of R22 refrigerant R410A 41 40 sec later after power input LED1 blinking Display normal micom condition LED2 3 On Back up for left right compressor LED4 reserved LED5 blinking Communicate with main LED6 On Reverse connection at sub unit LED7 On Right compressor is in operation LED8 On Left compressor is in operation a Plus Outdoor unit Dip switch Setting PCB DIP switch 1 Main unit DIP RE Function Method description s w SET 1 X Cooling operation control No 1 push RED button 3 times for 3 sec 2 display 01 OF by tur
6. 9 units o 9 D gt Is SUB DIP switch 5 SUB1 6 SUB2 ON No 12942 Je211329 3 o Is power of SUB PCB s main power really supplied Supply main On Check LED blinking Terminal Block T N power again 5 Check and replace o Line Fuse Transformer Is transmission cables between outdoor units 2 connected correctly E 5 e 5 Is error code released order Sub2 gt Sub1 after power reset Replace Main or Sub PCB Yes End 85 s3Iuo4129 3 97 Dip switch setting of SUB unit Plus Sub 1 SW5 ON Sub 2 SW6 ON Main unit Sub unit A 330 E In order to check transmission __ _ _ ITI cables between outdoor units PITT FT check in order as below ICE T EF sk I LL 4i PCB connectors terminal block transmission cables Bowed Tale care of the phase sequence of 4 nere power sy stern E LI LI tT LI T 86 Dip switch setting of SUB unit Plus IT Hed 91seg e m m oo S h oS 2 5 gt 72949 5 1291432913 Main unit Sub unit o E gt E
7. Pipe 16 Pressure sensor Pressure switch Check valve 52 EEV Thermistor a Solenoid valve service valve Strainer a ny 288 HighiLaw Pipe Pressure Common Pipe 19 05 68 1 6 2 Multi V Sync 1 6 2 1 Cooling Mode UJ as 79 D i Low temp Low pressure gas High temp High pressure liquid High temp High pressure gas 429u2 51519 IU 49349 uonnjos suonounj 159 bs BE T x 5 5 8 1 3 edy ses anssad ubi 40opinc qng Strainer To be used only for series 17 Inckoor unit A bow temp Low pressure gas High temp High pressure liquid A Hich temp High pressure gas HH unit E E 1 Hz uH ok gt Se LI ____ ____ ____ il tt i 2 SS Unit pinbr yun joo pino qna adig ses qns Pressure sensor De Service Valve 7 ET E eu c c a m E T 0 20 D 3 Pressure switch Sensor EM Strainer de i d P amp Check valve Solenoid To be used only for series 18 1 6 2 3 Cooling Oriented Simultaneous Operation aem Low temp Low pressure gas High temp High pressure
8. Singh Control Group Control gt o x Check mode select setting of wired remote controller Outdoor main PCB dip switch no 5 Cooling or no 6 heating is in On different mode operation error may be occurred because the operation mode is fixed by dip switch setting 8 et a Dip switch Setting et 1 Cooling mode only o 7 setting before applying the power Setting before applying the power Dissolution method CHO7 with remote controller 1 Error removal method Turn off remote controller by pressing the On Off button on the cabled remote controller The error code will be removed automatically after a few seconds With cableless remote controller Turn off indoor unit and turn on with the other operation mode the error will disappeared 2 Immediately change the operation mode after the pressing the On Off button The same operation mode as in the indoor unit started at first other than the defective unit mode heating cooling After replacing the indoor unit PCB it should be done to do Auto addressing and input the address of central control 39 1 developed in transmission between the micro Problem in EEPROM inside Indoor unit EEPROM ASS Y Li processor and the EEPROM on the surface of the PCB error EEPROM 2 ERROR due to the EEPROM damage Error diagnosis and countermeasure flow chart Replace the indoor unit PCB and then make sure to do A
9. 10 Transmission Yellow LED should blink Check yellow LED blinks or not transmission circuit with When is OFF ON continuously Inverter PCB check transmission with main Fan Error LED Tennaresaann corinne Trarsmisi n LED Note gt Check fan assembly Error LED blinking Check 102 Ermm Inverter fan Red LED When red LED blinks error code happens Check error code at main PCB PCB error about inverter fan PCB 159 S9140 119913 97 3 3 How to check Multi V Space control box MUTLI V SPACE 10HP C BOX N2 COMP B FAN B N1 MAIN control COMP A FAN A 1 2 3 5 7 10 11 12 3 phase 4 line power input T BLOCK 3 phase 4 line power input FUSE a FUSE Excessive electric blockade 30A Noise filter Block and discharge noise Noise filter Block and discharge noise 4 MAIN PCB LOGIC control of the whole product FAN PCB BLDC FAN control FAN PCB BLDC FAN control COMP PCB BLDC COMP control m COMP PCB BLDC COMP control 3 phase power commutation 3 point phase commutation DIODE degauss m DIODE degauss REACTOR DC voltage stabilization and 10 REACTOR DC voltage stabilization and power factor beveling power factor beveling DC voltage recharge DC voltage recharge CAPACITOR COMP FAN CAPACITOR COMP FAN Magnet S W BLDC COMP switch Magnet S W BLDC COMP switch 160 IPM Switching degauss COMP 7 Switching degauss output o
10. 2 9 5 49949 juauoduoy 493249 uonnjos 291139913 suonounj 159 S21u04329 3 97 Plus 40 Plus II 401 402 403 404 1 Fuse failure Low current at CT While inverter compressor 2 Defective noise filter or operation R phase current 3 R phase connection problem CT sensor defect drops below 1A or CT short 4 CT sensor failure inverter PCB failure Error diagnosis and countermeasure flow chart Is the fuse normal refer electric component part Is noise filter normal refer electric component part After reset and restart the system 15 CT value actually less than 1 Plus Sync R phase Space U V phase Check connection state of R phase cable and reconnect Measure the CT current with clamp meter No Multi V PLUS Sync R phase 76 Replace the fuse Replace noise filter Replace Inverter PCB Multi V SPACE U U V VE The current difference among phases is less than 0 5 10 U UE VE FUSE Check Voltage of fuse should be within 0 1V In case of 220V Protect over disconnection of Fuse is disconnected ias deus 2 s gt Replace FUSE current when power is LIT 21529 plus Checking points of fuse Check Resistance of fuse should be within 0 12 In case resistance is disconnectio
11. If value is 100 1 open or 100 Q short error occurs NB Resistance value of temperature sensor change according to temperature 5 It is normal if value shown as below 5 error 9 Heat sink sensor 5 tolerance 10 C 20 0k 25 C 10 0k 50 3 5k2 85 1 0k2 Temperature sensor location of Heat sink Measure the resistance of heat sink temperature sensor o o 5 5 5 95 1 Fan motor defect assembly condition abnormal 2 Wrong connection of fan motor Fan RPM is 10RPM or less Plus II for 5 sec when ODU fan connector 671 672 673 673 1 1655 Hall sensor U V W output 9 3 Reversing rotation after RPM target Outdoor unit FAN apply LOCK error 4 Fan PCB assembly defect After FAN drive signal If the HALL SENSOR signal does not come on for 4 sec 1 Motor connection defect 2 FAN PCB defect 3 Motor defect Error diagnosis and countermeasure flow chart Plus s the motor connection status normal Reconnect motor connector Is the motor normal Replace FAN PCB Check Hall sensor of BLDC FAN motor Replace FAN motor Ha 4 Hb 3 gt Gnd 2 22MOhm Ha 4 Hb 3 gt Vcc 1 11KOhm Check resistance of LGDC FAN motor power wire 19 09 7 75 C 96 Error diagnosis and countermeasure flow chart Plus IT No Reconnect motor connector Is ODU Fan Motor Assemble condition normal
12. 2 Troubleshooting Guide for each Error Code a Y U TZ 5 NA S 92 Includede model Plus Sync Plus Tropical LG Electronics Inc Sa gt WAP A CNS EY Y VT ES Y AQ y RERA A SAN ene 54529 55 2 7 D HRE 7 AS me PR Y ye Ye 9 lt TDA 5 62 SSA 2 PNY 5 t C 90432 913 93 1 Indoor unit PCB wrong connection Indoor unit pipe inlet sensor error 2 Indoor unit PCB failure P 3 Sensor problem main reason Indoor unit pipe outlet sensor error rror diagnosis and countermeasure flow chart Is sensor properly connected to PCB Connect properly to PCB Is the resistance value Change the sensor of sensor normal Change the PCB In case the value is more than 100 open or less than 100 amp short Error occurs Refer Resistance value maybe change according to temperature of temp sensor It shows according to criteria of current temperature 5 margin gt Normal Air temp sensor 10 C 20 78 25 10k 50 3 42 Pipe temp sensor 10 C 1052 25 02 5kg 50 1 88 CN ROOM Indoor air temp sensor CN PIPE2 Pipe outlet temp sensor CN PIPE1 Pipe inlet temp sensor Measure the resistance of outlet pipe temp sensor 34 1 R
13. BOARD maie En 8 ai enger ez gi woven 0 9 um m T el 1 2 120 TOIMVERTER BAAD R a E sg HERE SNA y r 55833 E BEC gt TO T B E AW VALE po E D E Zee E Bea m EDA E WAGNFTIE SWITCH XOMESOUT AT SENSOR ENS PPE SUSTION TEMP SEHSOR F CREMO PIPEC COMET DERCHASE TEMP SENSOR DOLOR MOTE _ 3 ___ PPE __ TEMP EA A EX CODEC TEMP Xm v a ae 23 were zt Hi ditata GONE Hes 49 E TEME GV EXENTELLUE RIS TINI uf aly Ww E of M BR WH L TERMINAL BLOCK EXCEPT COOLING ONLY MODEL OF INDOOR UNIT r 38 380 415V3N 50Hz 3854A20390N 29 Ww 9 o 79 o 49949 juauoduoy DD JOH 29132913 a 49949 uonnjos suonounj 359 p Q m O 3 0 5 9 1 7 3 2 Multi V Sync Sub Unit AWAY VALVE EWITCH LEY EKPANTION VALE EDCR ER FAF MAGNETIG SWITCH OUT Am M TEMP SENSOR CHAE PIPE EMP SENSOR GOASTDISCHAGE TEMP DISCHARCE TEMP SENSOR FUGA TEMP SENSOR ENZHSCHM SUNL IN TEMP SENSOR EMEN SCA QUID TEMP SENSOR CNOMP
14. Yes Is HR unit valve No connector normal Yes Is HR unit configuration on auto pipe detection Yes Is the pipe detection success during auto pipe detection Yes No Is HR unit valve LED turns on when connected indoor unit start to operate Yes No Is the resistance value of HR unit valve coil normal Yes Is the HR unit PCB valve measures 220V in port electric component part No Yes Check HR unit coil assembly location Yes Check for bent or blocked from connected pipes Check blocked HR Unit is the resistance value of outdoor unit check sol valve normal No Replace HR unit valve coil Yes is the outdoor unit Check sol valve measure 220V in port No Replace outdoor unit PCB Replace HR unit valve connector Check HR unit manual pipe address Refer to HR unit manual pipe detection set HR unit manual pipe search address Refer to HR unit manual pipe detection Replace HR unit PCB Replace HR unit valve coil Replace HR unit PCB n case of frost and high temperature difference between inlet and outlet of strainer strainer blocking may happen Caution frost on the outlet area afterward after half of body Check sol valve coil resistance value 1 85 10 HR unit valve coil resistance value 1 85 k2 10 75 Hed 21529 mec 90 9
15. 49349 uonnjos suonounj 159 S21u04329 3 97 1 Input Voltage abnormal R S T N Plus IT ODU 3phase power T Ong 2 Check power Line connection condition 501 502 omission 503 504 error Fus input 3 Main PCB damage Error diagnosis and countermeasure flow chart Check R S S T T R phase voltage is 380V 10 Is input voltage normal Re amp N S N T N phase voltage is 220V 10 Check connection condition and wiring if power is abnormal Replace Main PCB assembly Is main PCB assembly normal Recheck power and installation condition Measuring input voltage Noise filter wiring 84 1 130 more than outdoor unit rated capacity Over Capacity Sum of indoor unit capacity 2 Wrong connection of transmission cable piping Plus 51 Plus 1 511 Sum of indoor unit capacity is exceed outdoor unit 3 Control error of sub outdoor unit DIP switch more than outdoor capacity capacity specification 4 Power supply defect of Sub unit PCB 5 Outdoor unit PCB defect Hed 91seg Error diagnosis and countermeasure flow chart Is capacity sum of indoor units less than 130 of outdoor unit capacity at LGMV Yes Yes Adjust the capacity of indoor and outdoor unit Adjust corresponding DIP switch Are quantity and capacity No Check transmission cables of indoor units installed ame as the data of LGMV No between indoor and outdoor m S
16. DC voltage connection 6 16 2 DC Volt connected Check DC Voltage 470 520 Plus II 122 Excessive rise of high pressure in Compressor Off due to the high pressure switch Refer to CH24 outdoor unit in outdoor unit Hed 21529 Outdoor 3 phase power supply problem Reverse phase No power in 1 or 2 Wrong connection or 3 phase poner cable Refer to CH54 Reverse phase Phase omission phase 104 transmission error between the outdoor Transmission error between outdiot units Main outdoor unit is not receiving signal unite from Sub units Refer to CH104 147 149 171 Sub outdoor units are not receiving signal from Main outdoor unit oo 9 o9 49949 juauoduoy 493249 uonnjos 291139913 suonounj 159 123 Plus 113 Main 125 Sub1 137 Sub2 166 Sub3 Plus II 11131 12 132 13 133 14 134 Outdoor unit liquid pipe Abnormal sensor 1 Defective temperature sensor connection condenser resistance value 2 Temperature sensor defect Open Short temperature Open Short 3 Outdoor unit main PCB defect sensor error Plus 114 Main sub cool inlet 115 Main sub cool outlet 126 Sub1 sub cool inlet 127 Sub1 sub cool outlet 138 Sub2 sub cool inlet 139 Sub2 sub cool outlet 167 Sub3 sub cool inlet 168 Sub3 sub cool outlet Outdoor unit sub Abnormal sensor 1 Defective temperatur
17. is the Error disappeared Yes HR unit s power cable or transmission cable connection defect Auto Addressing wrong address setting of the indoor unit Defective indoor power transmission error and PCB defect Wrong setting of the HR unit s rotary switch or dip switch HR unit PCB defect HR unit s power cable or transmission cable connection defect After Auto Addressing wrong address setting of the indoor unit Defective indoor power transmission error and PCB defect Wrong setting of the HR unit s rotary switch or dip switch HR unit PCB defect Check H R unit input power 220V 1096 Yes Check installation status of communication line and connected pipe outdoor unit HR unit outdoor unit Yes Check if all indoor unit is CHO5 with unit on Refer to CHO5 Adjust H R unit manual pipe detection NB If Indoor units transmission cables of HR unit and cables of power 220V has been changed each other transmission parts and indoor will be burnt 133 Hed 21529 209 10443 y983 40 12942 13ueuoduio5 291199913 49349 uonnjos suonounj 159 Turn on HR unit gt Indoor unit gt Outdoor unit in the order named P Outdoor unit main PCB lt 7 Segment gt Auto addressing 2 Wait for 3 minute Press SWO2M of the ODU main PCB for 5 seconds 88 is displayed on the ODU main PCB and the HRU PCB After 2 7 minu
18. noise filter is Is not supplied disconnected gt Replace noise filter 91 Installing old Sub Slave coe mixed and 1Installing LGDC Slave Unit and Super sub installation new slave ODU Unit together together Error diagnosis and countermeasure flow chart Recheck power and installation condition Installed 3 UNIT or more Is LGDC Slave Unit installed Recheck power and installation condition Is Super Sub Unit installed Recheck power and installation condition Slave Sub Unit mixed installation Slave Unit Dip S W Setting Slave 2 92 EEPROM Access error Plus II Inverter PCB EEPROM and 1 EEPROM contact defect wrong insertion 601 602 Check SUM error 2 Different EEPROM Version 603 604 3 ODU inverter PCB assembly damage yed Error diagnosis and countermeasure flow chart 1 Check EEPROM insert direction connection condition 2 Check EEPROM Check SUM Replace if abnormality found Is EEPROM insertion normal e ms m oo A h oS 2 5 sy s inverter PCB assembly normal 72949 juseuoduio93 1291432913 Replace inverter PCB assembly Recheck power and installation condition Inverter EEPROM 493y9 uonnjos suonounj 159 Note Replace after power off 93 1 2913 97 D 1 Defect of heat sink cooling fan Plus 2 Defect
19. 493y9 uonnjos suonounj 159 97 D a Plus Part Check How to check Counter measure Function points Capacitor To charge DC voltage for inverter compressor INV compressor PCB Electric capacity when power is not supplied DC charging voltage When power is supplied 2 Power amp start relay Replace capacitor when value is more or less than normal spec Electricity capacity of capacitor must be 2600 2800 F and the resistance of capacitors should be more than few Check values at both terminal of capacitor Check input voltage and replace capacitor Charged voltage of between terminals of capacitor between IPM P N terminal DC link terminals should be more than 450V At the moment of inverter compressor start 5 Checking circuit for reverse phase 3 High pressure 4 DC Link 6 transmission switch amp sensing amp circuit to main power relay display circuit PCB of input power drive circuit drive circuit On board writing connector 1 MICOM circuit dE 9 PWM driving signal output circuit 8 CT sensing circuit Meno dete ees eee Check point How to check No power 2 Power Input voltage should be 220V Check amp replace fuse 3 15A at PCB when power is supplied T N voltage 220V Input resistance should be more than a few If resistance value is 01009 when po
20. 91seg Yes 1 Check resistance between each phase U V W of ODU No fan motor terminal 19 08 7 at 75 2 Check insulation resistance between ODU fan motor terminal U V W Replace fan motor if abnormality found Is ODU Fan Motor normal Yes e m oo A h oS 2 5 sy Check wiring between OUD fan motor and fan PCB No Check if Hall Senor and Motor output terminal color is matched Reassemble if abnormality found No Replace Fan PCB assembly Yes Recheck power and installation condition Fan Motor resistance measuring Hall Sensor connector between each phase Fan Motor Wire connection Is wire connection of ODU Fan Motor wire normal Yes Is Fan PCB assembly normal 12942 uonnjos us suonounj 159 resistance Check Hall sensor of LGDC FAN motor 19 02 7 75 97 s3Iuo4129 3 97 D Constant Speed Constant Speed Constant Speed Compressor CT Plus IT Compressor CT Sensor Compressor CT Sensor Sensor 701 702 703 704 Error Open short defect Error diagnosis and countermeasure flow chart Check constant speed compressor CT Sensor wiring condition and locking Is constant speed compressor CT Sensor connection condition normal Recheck power and installation condition 98 Inverter input current Micom input voltage isn t 1 Input voltage abnormal T N CT within 2 5V 0
21. Is the resistance of discharge No temperature sensor normal Weld reconnect the Yes cracked portion and recharge refrigerant S LEV in outdoor unit norma No at heating operation efer electric component pa Yes Does liquid injection corresponded operate normally Yes No Is it cooling mode of I Multi V Sync Yes Next page strainer etc clogging 1 Temperature sensor defect of inverter compressor discharge pipe 2 Refrigerant shortage leak 3 LEV defect 4 Liquid injection valve defect 5 Check solenoid valve defect Sync 1 Temperature sensor defect of constant Space Inv compressor discharge pipe 2 Refrigerant shortage leak 3 LEV defect 4 Liquid injection valve defect 5 Check solenoid valve defect Sync Adjust refrigerant amount Replace discharge temperature sensor Replace outdoor unit LEV Check liquid injection corresponded Check another No components s there pipe and operation conditions Yes Take measures Repair pipe clogging Resistance value of discharge temperature sensor 10 C 362k2 25 C 200k 50 C 82k2 100 C 18 5 66 Is it cooling mode of Multi V Sync Is the resistance value of outdoor unit Check sol valve normal Replace HR unit valve coil Is the outdoor unit check sol valve measure 220V electric component part Replace outdoor unit PCB Check for bent o
22. Sensor connection to PCB is normal Insert sensor connector to PCB properly Is the resistance of sensor normal Replace sensor Is sensor resistance value same as temperature value of LGMV Replace corresponding sensor Error is generated if the resistance is more than 5MG open and less than 2 short Replace corresponding outdoor PCB Note Standard values of resistance of sensors at different temperatures 5 variation 10 362k2 25 200k9 50 829 100 18 5k2 Check the resistance Check the resistance inverter compressor X of constant discharge compressor temperature sensor discharge temperature sensor 78 yed Check the resistance inverter compressor discharge temperature sensor e m oo S h oS 2 5 sy Check the resistance of constant compressor discharge temperature sensor 429u2 uonnjos ue suonounj 159 79 Plus 42 Main i 5 Sensor error of low Abnormal value of 1 Bad connection of low pressure connector 158 Sub3 ressure sensor 2 Low pressure connector defect Open Short Plus II Open Short 3 Outdoor PCB defect 421 422 423 42 4 Error code Error contents Meaning Main causes Plus 43 Main 116 Sub1 128 Sub2 Sensor error of high Abnormal value of 1 Bad connection of high pressure connector sensor 2 High pressure connector defe
23. g 5 E i 5 28 cung 5 mm b 8 da Eg oc 5 55 1 1 E 5 3 2H O BO E NE 9 5 al 3 33 1 1 7 25 gt Ed a p 5 98 HAMR oz E E 372 PE BE HERPETIC 0 D PIPEL TERMINAL BLOCK OF INDOOR UNIT IDE Who 1 4 4 Bones COLOR NOTE TWAY VALVE H P NOTE RV 63H 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 L Q m La 1 s a P 28 1 7 3 Multi V Sync 1 7 3 1 Multi V Sync Main Unit MAIN BOARD 8 CNIG B i bd Mia m WH BK E L WHAO YL BL B4
24. trans 11 1 D gt 0 D DC voltage of connectors should be Replace PCB transformer and mission 12 0 D gt 0 D various 7V 7V check connection points 14 Inverter Yellow LED should blink Check Main Inverter compressor PCB compressor and 15 Inverter fan Green LED should blink connection points Check Main Inverter fan PCB In case 3 AC 220V Voltage of PCB should be 220V at LGMV Replace PCB and check connection points PCB AC output to drive Replace PCB and check connection points PONEN valves and Output voltage should be showed as output is bel 0 others elow Sensor 5V Cooling fan 12V LEV 12V 148 a Plus Coil resistance when power is not supplied Outdoor transformer Supplies power to PCB and transmission In Output voltage when power is supplied ist side 429 2nd side 2 49 0 259 2 4 Q Replace transformer and check connection points Replace transformer and check connection points 1st side 220V AC 2nd side 14V 9V AC 149 10113 21528 10 aping Buljooysajqnoly 1291439913 5 2 2 19349 uonnjos suonounj 159 S21u04329 3 97 b Plus T BLOCK Check voltage Terminal Block Input power Check 2 In case power is not supplied Voltage of 36 R S T should be within 3804 1096 Voltage of 16 R N S N T N should be within 2203 10
25. 4 valve housing am 1 valva housing 1 heating valva LEDired T SEG Sos Switch addressing urit Swot 91 02 SWo1M SWOSM SWO4M Dip switch for setup Switch for manual valve the function of HR unity SWOSM 04M pedis 59 yed e oo A h oS 2 5 sy 22942 uonnjos euo suonounj 159 Plus II Connector location of high pressure switch at PCB Refer electrical component part for Mult V Space Constant compressor pressure switch Inverter compressor pressire switch Checking short or not at connector of high Checking short or not at connector of high pressure switch pressure switch 60 Plus 25 Main 147 Sub1 The power supply input voltage tolerance is more or less than allowable standard 149 Sub2 Low over voltage 171 Sub3 of main PCB input Plus I 251 252 253 254 1 Input voltage is abnormal T N 2 Outdoor unit main PCB defect Hed 21529 Error diagnosis and countermeasure flow chart Check input power from building is supplied correctly or not e ms m Q oo S h oS 2 5 ET Is input voltage of PCB 190V 250V Replace main PCB 429u2 uonnjos sia suonounj 159 Check voltage at outdoor T Block 220V Plus II 61 S91u043129 3 97 Plus II 261 262 263 264 1
26. Is high pressure of LGMV similar as at manifold gauge Yes No Check pipe is blocked or not and take measure Yes N B Replace high pressure sensor Next page 57 o m Q zu O 3 a 5 2 Yes Is HR unit valv 5 2 Connect HR unit valve connector Yes Check HR unit manual pipe address Is HR unit configuration Refer to HR unit manual pipe detection on auto pipe detection Is the pipe detection success during auto pipe detection Set HR unit manual pipe detection Refer to HR unit manual pipe detection Is HR unit valve LED turns on when connected indoor unit start to operate N Replace HR unit PCB Yes Replace HR unit valve coil Is the resistance value of No HR unit valve coil normal Yes Is the HR unit PCB valve measures 220V in port electric component part No Replace HR unit PCB Yes Check HR unit coil assembly location Yes Check for bent or blocked from connected pipes Check blocked HR Unit 58 Plus Connector location of high pressure switch at PCB Refer electrical component part for Multi V Space Inverter compressor PCB SUB outdoor unit PCB Checking short or not at connector of high Checking short or not at connector of high pressure switch pressure switch Check resistance of HR unit valve coil 1 85 k2 10 HR unit PCB
27. Voltage drop should be within 10V at Resistance of R S S T R T R N S N should be more than a few k amp Resistance of T N should be within 40 502 Main transformer of outdoor Checking points of fuse Resistance of fuse should be within 0 12 Voltage of each connector R R S S T T should be within 0 40V Plus Plus IT Noise Miter output lower part Noise nior Input upper part Checking points of Voltage Resistance of each connectors R R S S T T should be within 07109 52 Counter measure Check supply power and connection condition Check short or not of Control box Noise filter PCB cables Replace transformer In case of 220V Fuse is disconnected gt Replace FUSE In case resistance is co Fuse is disconnected gt Replace FUSE In case of 220V It is disconnected gt Replace noise filter In case resistance 15 noise filter is disconnected gt Replace noise filter Part Check Function points INV PCB Plus Measure the CT current with clamp meter Multi V SPACE U U V VO 4 The current difference among Multi V PLUS Sync R phase phases is less than 0 5A 10 U UC V VC 3 DIODE Plus E x a P U DIODE 0 4V P V DIODE 0 4V P W DIODE 0 4V resistance a few M2 resistance a few M2 resistance a few a y N U DIODE 0 4V N V DIODE 0 4V N W DIODE 0 4V resistance a few resistance a
28. Yes Check No 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 abnorma Is input voltage normal Yes Is inverter PCB assembly normal No Check inverter PCB assembly IPM normality Replace inverter PCB assembly Yes Recheck power and installation condition 64 Troubleshooting Electrical Basic Part Guide for each Component Check Solution Check Test functions rror Code Compressor wire connection Measuring resistance between each terminal of compressor Measuring input voltage 65 32 Plus Inv Plus II 321 322 323 324 Over increase discharge temperature of inverter compressor at main outdoor unit Compressor is off because of over increase discharge temperature of Right inverter compressor Comp N1 33 Plus Main Plus II 331 332 333 334 Left SPARE Comp N2 plus 100 101 Sub1 102 103 Sub2 152 153 Sub3 Compressor is off because of over increase discharge temperature of constant Space Inv compressor at main and sub outdoor unit Over increase discharge temperature of constant Space Inv compressor at main constant outdoor and sub constant outdoor unit Error diagnosis and countermeasure flow chart Is the additional ref amount correct Start up process No Yes No Is there pipe crack or trace of leakage Yes
29. connect orCOMP fault C tart fail At below min Hz 2 DC CT sensor fault OmpreSSor Start fature U V current is lower than 1A 3 INV PCB fault 4 IPM component or connector fault Error diagnosis and countermeasure flow chart No Is IPM normal electric component part Replace IPM Is COMP normal electric component part Replace COMP After reset and restart the system is CT U V phase value actually less than 1 Replace Inverter PCB Check connection state of R phase cable and reconnect e Measure the CT current with clamp meter U U V V The current difference among phases is less Measuring resistance than 0 5A 10 between each terminal of compressor Multi V Space Multi V Plus II 62 28 Master 281 Slave1 Voltage error supplied over 780 282 1 Input voltage abnormal R S T N 2 ODU inverter PCB damage DC Link voltage sensing part Inverter DC link high Inv PCB DC link voltage 283 Error diagnosis and countermeasure flow chart 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 Is input voltage normal Is inverter PCB assembly normal Replace inverter PCB assembly Yes Recheck power and installation condition r Measuring in
30. resistance a few 156 b Plus REACTOR DC voltage stabilization 34 DIODE Resistance of connectors amp connection condition Check voltage amp resistance of each phases when power is not supplied Resistance of reactor should be within In case resistance is 1130 coil is disconnected When power 15 not supplied gt Replace reactor Voltage between terminals of reactor should be within Q 5 supplied In case the measured value is different from the table set multi tester to resistance mode and measure If the value is small 0 9 or high OR hundreds M 9 PCB needs to be replaced CS In case that bridge diode is damaged check if 1 inverter PCB assembly IPM is needed to be replaced Tester terminal 2 T red 0 4 V 0 7 V Red and black are the measuring terminals of multi tester 157 9po9 10413 Hed 91seg yore 10 aping 1291439913 O 5 5 2 2 49349 uonnjos suonounj 159 S91u043129 3 97 D b Plus Part Check How to check Counter measure Function points Inverter 2 220v Power input fan PCB 700 DC Link DC 15V Output am N Phase terminal y 1 R Phase To Diode R Phase Terminal From Noise filter T Phase Terminal From Noise filte
31. PP 5 Indoor outdoor unit LEV defect 146 Sub2 Excessive drop of 6 Covering clogging 170 Sub3 discharge pressure of be off due to excessive drop of low compressor Plus II pressure by the low 351 352 pressure sensor outdoor unit covering during the cooling mode indoor unit filter clogging during heating mode 7 SVC valve clogging 8 Outdoor unit PCB defect 353 354 9 Indoor unit pipe sensor defect 10 HR unit valve coil defect Multi V Sync 11 HR unit PCB defect Multi V Sync Error diagnosis and countermeasure flow chart Is service valve Open service valve opened Yes Are transmission cable piping normal Yes Is the additional ref amount correct Start up process No Adjust refrigerant amount No check transmission piping correction Yes No Is there pipe crack or trace of leakage Yes Is fan normal in heating outdoor fan in cooling indoor fan No Check and replace related parts error 105 108 reference Weld reconnect the cracked portion and recharge refrigerant 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 Replace the pressure sensor Yes No Check indoor unit LEV Check indoor unit PCB Check in outdoor installation condition Yes Next page 74 Yes No Is it heating mode
32. UV Chassis TE 1 UV1 Chassis 325 2 UV2 Chassis 03 Air Discharge DirectionS Side Discharge 228 R Right L Left 55 F Both Electrical Ratings 8 30 380 415V 50Hz 9 30 380V 60Hz 220V 50Hz 30 220V 60Hz Total Cooling Capacity in Horse Power HP unit EX 4 5HP 45 10HP 100 72942 2 Combination of Inverter Type and Cooling Only or Heat Pump N Inverter and H P V Inverter and C O o H H P Sub Unit C C O Sub Unit B Inverter and Heat Recovery S S Heat Recovery Sub Unit 9 System with Outdoor Unit using R410A D e 5 2 1 2 6 Multi V Sync Outdoor Unit R410A o 2 B 106 e o Serial Number 3 Air Discharge Type S S Side Discharge T Top Discharge Electrical Ratings 8 30 380 415V 50Hz 9 30 380V 60Hz 220V 50Hz B 220V 60Hz Total Cooling Capacity in Horse Power HP unit EX 4 5HP 45 10 100 Combination of Inverter Type and Cooling Only or Heat Pump N Inverter and H P V Inverter and C O H H P Sub Unit C C O Sub Unit B Inverter and Heat Recovery S Heat Recovery Sub Unit MULTIM System with Outdoor Unit using R410A 1 2 7 Multi V Indoor Unit R22 na Serial Number Combinations of functions A Basic function G Low Static Motor L Neo Plasma Wall Mounted C Plasma Ceiling Cassette ART COOL Type Panel Color B Blue D Wood M Metal
33. ig T HT A BOARD d INVERTER 6 BOARD al S HE T te CH IT Epoca Ej EEE 42 EE FAN 1 ON wat tae RD 4 4 poe EXFRATION VALVE Ex MAKETI wl v Tv s corneren canaria COLOFLNOTE TO NOISE FILTER OUT 1 CONDENSOR TEN ODED CARME PPE CONDESA TEMP SENSOR AED SUCO TEMP CARAC SHITE a Eo E E E INV COMP a ii SCHOL LE OMY GREENYELLOW T HEAT SINK Dc FAM TO INVERTER BOARD FAN BOARD EEY 9e Fug ess 91 CHIS e OX Sd En AC POWER de 85 2000 OUT ME S MAIN HH FILTER 277 PE Es
34. transmission circuit with main When is OFF ON continuously 3 PCB check transmission with main PCB 5 o Inverter fan Red LED When red LED blinks error code happens Check error code at main PCB PCB error about inverter fan PCB Check voltage amp resistance of each phases when power is not supplied P U DIODE 0 4V P V DIODE 0 4V P W DIODE 0 4V resistance a few M resistance a few M resistance a few 9 N U DIODE 0 4V N V DIODE 0 4V N W DIODE 0 4V resistance a few resistance a few M resistance a few M2 155 90432 913 97 a Plus Check How to check Counter measure dd points Inverter 1 PWM signal connector fan IPM PCB 2 DC supply terminal DC310V Inverter fan 1 PWM signal Check 9pin connectors Replace cables amp check is not rotating 2 Fan DC power DC voltage should be charged of 310V soldering condition of PCB 3 Outdoor While Fan operating in case voltage of Replace connectors amp inverter fan connector connectors U V V W U W is 100 300V PCB if not charging Normal 4 IPM EL AR AA Replace inverter IPM Check voltage amp resistance of each phases When power is not supplied P U DIODE 0 4V P V DIODE 0 4V P W DIODE 0 4V resistance a few 2 resistance a few resistance a few M gt AS T ya l 94 N U DIODE 0 4V N V DIODE 0 4V N W DIODE 0 4V resistance a few 2 resistance a few
35. 1 999 10 En 1 7 E k ra 105594409 Y Resistance between U W Resistance between V W Resistance between U V Insulation resistance of compressor when power is not supplied Check insulation resistance of constant compressor inverter compressor a few MQ 1 constant compressor a few M2 7 170 C Plus Plus Check location and method Check outdoor unit LEV Hed 91seg 10413 10 aping Bunoouso qnoJ CD 3 around 3009 CD 6 around 1509 1291439913 O 5 5 5 2 2 o 3 around 3009 2 6 around 3009 4 6 around 1509 Measurement of outdoor unit LEV coil resistance S 2 x Outdoor unit main LEV Outdoor unit sub cooling LEV Indoor unit LEV 5221A20001F 6141420009 E ZEDM AOYHLGK 6E A FUJIKOKI M12A 02 PACIFIC 8 5 VESES D234 0900000 around 3002 0 9 104 69 D around 3002 2 4 around 3002 2 104 69 2 around 3002 D or around 1502 D or 2 or D around 1502 or around 1502 or 52 39 or 4 6 around 150Q 171
36. 3V at initial 2 ODU inverter PCB damage sensor error state of power supply CT sensing part Plus II 711 712 713 714 00 o o y m Error diagnosis and countermeasure flow chart mee Check 202 R S S T T R phase voltage is 380V 10 9 Is input voltage normal Re amp N S N T N phase voltage is 220V 10 9o B Check connection condition and wiring if power is PE abnormal Yes Is inverter PCB assembly normal Replace inverter PCB assembly Recheck power and installation condition 72949 1291432913 Measuring input voltage 493y9 uonnjos suonounj 159 99 input instant over Plus IT 731 732 733 734 current error Matter of software Inverter PCB input 3 phase power current is over 50A peak for 2ms 1 Overload operation Pipe clogging Covering EEV defect Ref overcharge 2 Compressor damage Insulation damage Motor damage 3 Input voltage abnormal R S T N 4 Power line assemble condition abnormal 5 Inverter PCB assembly damage input current sensing part Error diagnosis and countermeasure flow chart Is installation No condition normal Yes Is input voltage normal Yes Is AC input Wire connection No condition normal Yes Is compressor Wire connection condition normal No Yes Is inverter PCB assembly No normal Yes Recheck power and ins
37. 4294 291139913 Replace Capacitor Is the voltage of 3 phase diode more than maximum 270V Replace outdoor unit inverter PCB After indoor unit turned on and the compressor is not operated just before magnetic switch 15 turned on the voltage between the 2 terminal as below is more than 270V Check whether all the connections and terminals is normal and reconnect Capacitor Electric Electricity capacity of capacitor must be Replace capacitor To charge DC capacity 2600 28004 and the resistance of capacitors when value is more or voltage for when power is should be more than few kQ less than normal spec inverter not supplied compressor Check values at both terminal of capacitor DC charging Charged voltage of between terminals of capacitor Check input voltage voltage between IPM P N terminal DC link terminals and replace capacitor When power is should be more than 450V supplied At the moment of inverter compressor start 55 Hed 21529 e ms 90 9 2 9 gt 49349 uonnjos suonounj 159 Part heck R How check Counter measure Function points T BLOCK Terminal Block Input power FUSE Protect over loaded current plus Nose filter Noise emit amp protect Check 2 In case power is not supplied Check disconnection of FUSE whe
38. V Plus II 10 Basic Part Troubleshooting Guide for each Error Code Electrical Component Check Solution Check Test functions D4d UON WVYOVIC 9NIMIM YOOULNO 25 S291u043129 3 97 1 7 1 5 Multi V Plus II 10 12HP UW1 26 E d TD cing MEZ41547001 Component Check Error Code Troubleshootin Guide for Sacr Electrical Solution Check Test functions 0660 99 _ _ 4 TS00W AINO Ld39X3 NOL dO WNG IONS 10S AS MOTBA MosNSSdr CNIS JENI e IN B NAHE Ya HOS NIS dH THIN3S d ezua om ISEND T 1000815 ama HO8N35 diit Lno 5 USING am uk HOSH3S HOSNSNOC ae m HoGa HHV HOSES BOSNSONOO X3 a VS 1 ADSC SIDWHOTS WINES JAMILAH ANI aid SENO 3503 2 2 3814 HOGASS 18402 Madda ONO MOSNIS JAIL NOLON HETE MOSNAS da IN VELOSO HOLIMS LONEN 1425 4203 WOO ITV NOLIN HAUAS fH Hea ARA F ALON 1 7 1 6 Multi V Plus Sub Uni 27 1 7 2 Multi V Space m
39. above 17 C ove 2300 7 Figi Pee kPa 7 Heating below 1400 8 Low Pressure kPa 200 600 Boe 60120 9 Indoor LEV Pulse 800 1900 7 300 1600 below200 10 Outdoor LEV M E 11 Discharge pipe above 15 C below 15 C Tb condense 12 Comp Discharge T 60 100 Suction above 0 50 below 0 13 C Superheat above 7 C 14 DC Link voltage Plus Il 380 Below 320V Above 700V The pressure is relative value Overcharging 30Hz Fan Lock Overchaning 25Hz Plus 11 Ref Leakage or Ref Shortage Overcharging Ref Leakage or Ref Shortage Overcharging Full Open Overcharging LEV fault Ref Leakage Indoor Path Clogging Overcharging Fan Lock Ref Leakage or Ref Shortage LEV fault Ref Leakage or Ref Shortage Pipe Inlet outlet Subcooling control Overcharging Ref Leakage or Ref Shortage Overcharging LEV fault Ref Leakage or Ref Shortage LEV fault Liquid compression Overcharging Ref Leakage or Ref Shortage Inv PCB fault Voltage sensor fault The operation ratio of indoor unit is not less than 80 and the value of above table is measured at stable state with LGMV The value of above table is not absolute and can be changed according to operation status or installation environment The causes of above table are representati
40. blink Transmission circuit with main PCB Red LED When red LED blinks error code happens about inverter fan PCB 117 Counter measure Input circuit of 34 DC rectifying circuit In Output connector of reactor DC Link output voltage DC Link electrolytic capacitor Check supply voltage noise filter fuse Replace inverter fan PCB Check yellow LED blinks or not When is OFF ON continuously check transmission with main PCB Check error code at main PCB yed e m oo A h oS 2 5 ET 12942 uonnjos uo suonounj 159 Multi V Space BLDC FAN PCB 4 SW SEL 6 COMM LEDO1M PWM Enable 5 SW DIR LEDO2M display error 3 Power supply 2 CN DC LINK DC power supply sensor 1 CN POWER PCB power supply 13 FAN FAN signal output DIR MAIN PCB lt gt FAN PCB 5 6 8HP selection FAN direction FFAN lt gt COMP PCB 10HP 7 CN POWER2 louver power supply LEDO1K FAN INV communication 8 SW01M 02M 03M PCB JIG check 9 CN_WIRTE on boarding light 10 CN M1S M2S louver signal input 11 SENSOR FAN signal input 12 CN MOTOR1 2 louver signal output Power does not turn 1 CN POWER AC voltage measure 220V on 3 Power supply ZNRO1D barrister FUSE burn out CH105 checkup DC 470V 520V displays DC 380V and above are
41. fan PCB and in case of fault replace inverter fan PCB refer electric component part Is noise filter normal refer electric component part No Replace NOISE FILTER Yes Replace inverter compressor PCB CH54 SUB PCB CH110 141 155 Check power cable connection state Check power cable connection state phase order power phase R S T order power supply state supply state in distribution panel in control box of product 90 FUSE Check Voltage of fuse should be within 0 1V In case of 220V Protect over disconnection of ET 7 Fuse is disconnected loaded FUSE p gt gt Replace FUSE current when power is supplied Hed 91seg plus Checking points of fuse Check Resistance of fuse should be within 019 In case resistance is disconnection of Fuse is disconnected FUSE gt Replace FUSE when power is not supplied e m oo S h oS 2 5 ET Nose filter Check voltage Voltage of each connector R R S S T T should In case of 220V Noise emit amp when power is be within 0 40V It is disconnected protect Supplied gt Replace noise filter Plus Plus IT 12942 uonnjos uo 50 suonounj 159 Molise part iter Input upper part Check 2 Resistance of each connectors R R S S T T In case resistance is When power should be within 0 1022
42. few resistance a few 53 Hed 21529 e m m oo A h oS 2 5 sy 12942 uonnjos ur gt suonounj 159 Part Check Function points INV PCB th rrent with clamp meter Plus II easure the CT cu p Current 25A 3 DIODE Plus IT Diode terminal terminal black terminal red Tester terminal m 0 YO Song ao Xam Red and black are the measuring terminals of tester In case the measured value is different from the table set multi tester to resistance mode and measure If the value is small 0 9 or high hundreds 2 PCB needs to be replaced In case that bridge diode is damaged check if inverter PCB assembly IPM is needed to be replaced 54 23 plus 23 1 4 Plus II 1 Looseness of DC link terminal Right DC voltage charging for Problem in DC charging voltage 2 Damage in starting relay 23 Comp inverter compressor driving 3 Capacitor damage defect akter starting walay turned on 4 Defective sensing circuit of the N2 Left inverter PCB 23 Comp Error diagnosis and countermeasure flow chart Is noise filter and fuse normal refer electric component part Replace Noise Filter or Fuse Is capacitor normal refer electric component part
43. for outdoor unit of Sunit system Master Slave1 Slavez in Close all the SVC valves of high low pressure common pipe 2 Operate system Check the difference of high and low pressure with LGMV for each unit Master Slave1 Slave2 amp f there is a unit in which the difference is not increased then the 4way valve of that unit is defective 129 152 153 Excessive rise of the constant Constant speed compressor Off due to the Refer to CH33 Plus Sub3 compressor discharge temperature excessive rise in discharge temp 155 power sunpiy Wrong wiring at the outdoor 3 phase Refer to CH54 Plus Sub3 TUNER Phase omission Reverse phase Phase omission transmission error between outdoor units 104 Main outdoor unit is not receiving sub ES ur ae outdoor unit s signals Refer to CH104 147 149 171 Sub outdoor units are not receiving main unit signals 157 Abnormal resistance value of sensor Plus Sub3 High pressure sensor error measurement Open Short Refer to CH43 158 T Abnormal resistance value of sensor Refer to CH42 Plus Sub3 measurement Open Short 159 Outdoor unit air temperature Abnormal resistance value of sensor Refer to Plus Sub3 sensor error measurement Open Short Compressor suction Abnormal resistance value of sensor 162 Plus Sub3 constant compressor1 Compressor discharge pipe Abnormal resistance value of sensor 163 Plus Sub3 constant temperature sensor error measure
44. height slope m 1 50 1 100 700mm 37 Hed 21529 e m oo A h oS 2 5 sy 12942 uonnjos aa eee suonounj 159 Auto addressing is not done transmission cable is not connected Short circuit of transmission cable Indoor unit transmission circuit fault Outdoor unit transmission circuit fault Not enough distance between power and transmission cable Is the fuse for main PCB power of outdoor unit burnt out No signal transmission between indoor amp outdoor units Indoor amp Outdoor unit transmission error Error diagnosis and countermeasure flow chart Replace the PCB of indoor unit No displayed error Is total number of indoor this error code CH05 units connected Re connect after check the after auto addressing transmission cable of indoor unit displayed error Yes Replace outdoor PCB after No Is not the power No checking Is outdoor PCB LED flickering supplied at main terminal block of outdoor unit Replace TRANS after checking Yes Replace main PCB fuse after checking Yes Check the insulation of inverter No constant compressor and then replace it Yes Replace after capacity of main circuit breaker Bad connection of power supply cable Is main circuit breaker off If nothing goes wrong Turn on main circuit breaker Main power supply pr
45. liquid High temp High pressure gas Ww D 2 79 D 19949 1891199913 Boolean 493y9 uonnjos suonounj 159 Pressure sensor Pressure switch Check valve EEV Sensor I4 Solenoid Service Valve 19 Low temp Low pressure gas S High temp High pressure liquid PA High tomp High pressure qas ES unit E 7 3 A 8 m I Pressure sensor Pressure switch 7 Check valve EE 1 Sensor ya Solenoid TE Dd Service Valve E Strainer SHE lt Outdoor unit oa ee aiia A ee eia id m Rc ee 20 1 6 3 Multi V Space 10HP 0 0 S i Pressure sensor a F 1 f INV Inverter 2 Pressura switch Comp Compressor LEY Linear Expansion Valve Check valve 0 5 Separator 3 Es mec Accum Accumulator go 5 SC HEX Subcooling Circuit mm Thermistor 0952 Heat Exchanger 6 E Solenoid valve 52 Semice valve 30 HEX SC IN TH m OUT E Service Port 12942 1291432913 Heat Exchanger 429u2 uonnjos SEL TH om 21 P SENSORIL Hot Gas Bypass ao 4 EA t 5 HIGH PRESSUA HIGH PRESSUE o SWITCH 7 E Es S PIPE TH a 712 m 53 Liquid Pipe Accum Gas Pips service Po
46. of In outdoor common pipe units 4 4way valve defect 11 gt 511 outdoor 4way 11512 reversing valve 11 513 11514 Hed 91seg Error diagnosis and countermeasure flow chart ms oo 9 o9 o s 4 Way valve connecter No connected Yes m Is 4 Way valve coil in Change 4 Way valve coil 3 2 resistance normal y os 9 E w s 4 way valve coil connected No to 4 way valve normally Re insert 4 way valve coil o Yes 5 5 In case of more than No Q Refer to CH 51 amp make measure m than 2 units Yes 9 After reset we E No supply un PCB Replace outdoor unit PCB 5 when starting eating mode operation Yes D sr Check and replace compressor ily 9 Magnet switch corresponding PCB UH refer electric component part Yes After opposite mode operation to present No If the same error is occurred in mode is the same error occurred again near future replace 4way valve Yes Replace 4 way valve 127 Plus Measure the resistance of 4way valve Location of 4way valve connector on Main Sub PCB marked as 4way s3Iuo4129 3 97 When power Is supplied in order as follow 3rd number indicates outdoor quantity at Main PCB 7 segment LED Outdoor unit 1set Model code capa
47. part Readjust and Replace after CH54 over 380V checking FUSE input power connection line 161 pe Q m ee o 4 9 Multi V SPACE BLDC FAN PCB LEDO1M PWM Enable LEDO2M display error 2 CN DC LINK DC power supply sensor 1 CN POWER PCB power supply Power does 1 LCNPOWER POWER 4 SW_SEL 6 CN_COMM louver DIR MAIN PCB lt gt FAN PCB 5 6 8HP selection FAN direction rFAN c S coMp PCB 10HP 7 CN POWER2 louver power supply LEDO1K FAN INV communication 8 5 01 02 03 PCB JIG check 9 CN WIRTE on boarding light 10 M1S M2S louver signal input 11 SENSOR FAN signal input 12 MOTOR1 2 louver signal output 13 FAN FAN signal output AC voltage measure 220V Input voltage 220V not turn on 3 Power EL NE CH105 ZNRO1D barrister FUSE burn out Replace related parts checkup FAN motion 2 CN DC LIINK DC 470V 520V displays Check and replace CAPACITOR disabled DC 380V and above are normal Replace PCB 13 CN_FAN CH106 11 CN_SENSOR CH67 communicat 6 CN COMM ion does CH105 not work U V W electric flow measurement Check up and replace connection stabilize and motor Check connectors Flick LEDO1K Check PCB power supply 220V check connector and PCB power Check and replace connector and supply communication PCB Louver does 4 SW_SEL Check if connector is connected conne
48. terminal Check Connector Check and replace connector and PCB Fan IPM P N amp U V W COCOS EIC CN EC o U terminal black Open 35K 10 V terminal black Open 35K 10 W terminal black Open 35K Q 10 120 Plus 107 Plus II 11 071 12 072 13073 DC voltage charging Low voltage of 1 Bad connection of voltage lead cable of PCB DC link 14074 failure of inverter fan outdoor fan motor 2 Fan main PCB capacitor defect Right motor drive below 380V 3 Fan main PCB defect 107 Fan N2 Left 107 Fan Error diagnosis and countermeasure flow chart Plus UN ms 9 o9 o 2S Buizooys jqnolL Is DC LINK cable Normal Adjust DC LINK cables 12942 Je211329 3 o Replace inverter fan 5 S O x Error diagnosis and countermeasure flow chart Plus IT 2 T gt E Is wiring between fan motor No 1 Check DC Link Wire connection o 2 DC Link and normal T Replace wire if abnormality found 2 Yes No Measure DC Link voltage i le DC Link votage normali Check inverter PCB if voltage is below 380V Yes No Is Fan PCB assembly normal Replace fan PCB assembly Yes Replace inverter fan PCB 121 Inverter fan main PCB Inverter fan IPM PCB Plus
49. 10K Constant compressor 2 BACKUP No 4 ON gt RESET operation while constant compressor2 right failure operate more than indoor unit capacity SINGLE 70K SERIES 110K 5 SUB1 2UNIT No 3 ON gt RESET SUB1 recognition 2UNIT 6 SUB2 3UNIT No 4 ON gt RESET SUB2 3UNIT 56 o SUB3 4UNIT No 3 No 4 ON gt RESET SUB3 recognition 4UNIT 165 Check Ra Check points Display Outdoor unit SW01B SW02B Value of main PCB DIP amp W Sw main display Value PCB in At the outdoor moment that unit power 5 supplied Initial setup There are 4 initial setup steps before running All DIP switch setting must be completed before initial setup 1 Step 1 factory setting value display Factory setting value is displayed in 7 segment on PCB for 24sec All dip switches must be set properly before step 1 Master modal code ty aplayed 390 Stave model code is displayed model code daplayed sec capacity including eub unis 19 displayed 299c pumo Dieplay 2 is value Example 30HP R410A Cooling only no display 63 gt 63 gt 63 gt 30 gt 2 gt 25 gt 41 Factory eafting 25 normal display 166 b Plus 2 Step 2 Communication check If all model code is displayed in 7 segment including all Slave unit communication between outdoor units is normal If 104 is displayed in 7 segment check c
50. 3y9 uonnjos suonounj 159 103 o m Plus II Fan DC Link High Fan PCB DC link voltage 1 Input power abnormal 761 762 763 764 Voltage Error supplied over 780VW 2 Fan PCB assembly defect 0 S Error diagnosis and countermeasure flow chart R S S T T R phase voltage is 380V 10 Is input voltage normal R N S N T amp N phase voltage is 220V 10 Check connection condition and wiring if power is abnormal Replace Fan PCB assembly Yes Is Fan PCB assembly normal Yes Recheck power and installation condition Measuring input voltage 1 Noise filter output lower part Noise filter input upper part 104 1 Overload operation 2 Fan Motor defect 3 Fan PCB assembly defect Plus II Fan Over Current Output current is over 5A for 771 72 773 774 Error 40ms yed Error diagnosis and countermeasure flow chart Is installation No No Check ODU fan motor assemble condition and locking condition normal Reassemble or replace if abnormality found Yes m oo S h oS 2 5 ET 1 Check resistance between each motor output terminal No 19 09 5 at 75 C 2 Check insulation resistance between ODU fan motor terminal U V W and pipe over 100 0 Replace fan motor if abnormality found Are the resistance No Between each phase and insulation resistance of motor output terminal no
51. 9 Voltage fluctuation should be within 10V While stand by and in operation Voltage drop should be within 10V Checking points of 36 R S Checking points of 16 R N Resistance of R S S T R T R N S N T N should be more than a few ke 150 Check supply power and connection condition Check short or not of Control box Noise filter PCB cables Replace transformer b Plus Check How to check Counter measure iom points Nose filter Check voltage Voltage of each connector R R S S T T should In case of 220V Noise emit amp When power be within 0 40V It is disconnected protect is gt Replace noise filter E Mar wiring Supplied Hed 21529 moe 325 goo y 1 nig A og 5 9793 899 os ze E 29 hiies es dirt E Biia A E n 3 Check 2 Resistance of each connectors R R S S T T In case resistance is In case power should be within 0 106 noise filter is Is not supplied disconnected e gt Replace noise filter c 3 Magnet Magnet switch When check resistance of 1st coil of magnet switch In case resistance is 5 switch 1st coil resistance should be 0 47 ks co or 0 2 Constant When power is not supplied gt Replace Magnet m speed When magnet switch is on voltage should be 220V switch 5 compressor When power is not supplied When voltage is not 220V magnet switch o is melt down 5 R
52. ALVE CTEM 52 3 T L PE MANETS SWITCH Lud CMONDUT Mm SENSOR gt CNET EMP SOR E AY DGCHARKE TEME SENSOR OLOR NOTE EA PIPE CI COMOENOUR TEMP SERERE ABE COLOR Fa PIPER DONDENSOR TEMP E BLUE y mS E H E TONER HP SENSOR IRR C f ME SOLFNDIDUALVE GAL BREENPTELLUNE REGN E aly TERMINAL BLOCK EXCEPT COOLING ONLY MODEL 32 380 415V3N 50Hz TT OPTION OF INDOOR UNIT 3854A20390N 22 1 7 1 2 Multi V Plus II Sub 5 6HP UY2 Basic Part Troubleshooting Guide for each Error Code Electrical Solution Check Component Check Test functions NE AGLP OBE PE 08908 tomes Lem 7 NIYIN 23 9NIMIM Es CHYOB Lerno LJ H Iu Li 23 1 7 1 3 Multi V Plus II SHP UW1 LG Electronics Inc 24d4 UuON WV39OVIQ 9NIMIM NOOGLNO 24 A6HP UW1 12 14 1 7 1 4 Multi
53. CB Plus IT Plus IT Plus 53 1 Transmission cables are not connected 21529 Plus II Transmission error In case Main PCB can t receive 2 Transmission cables are short or open 531 532 Indoor unit Main signal from indoor unit 3 No addressing after changing indoor unit PCB 533 534 4 Outdoor Main PCB or indoor PCB defect Error diagnosis and countermeasure flow chart ms oo 9 p Is indoor unit quantity correct after Auto Addressing Are quantity of indoor units installed same as the data of LGMV No 12942 1291432913 Is power supplied Supply power to indoor units Y c O Replace indoor unit or transmission PCB after check defected indoor c 5 8 O 5 In case of CH53 almost happened with 5 the indoor units not operated actually are normal so check with same method of CHO5 and additionally check as shown as below and above flow chart Although the quantity of indoor units installed is same as LGMV data there may be a few indoor units with which the number of transmission is not increased with LGMV Although the quantity of indoor units installed is not same as LGMV data and if transmission of the indoor unit displayed at LGMV is done well then the indoor unit suspected to have some problem and is not appe
54. CB and fan PCB 1 Wrong connection between Inverter and and fan PCB Fan inv Fan PCB 2 Fan PCB power not supplied 3 ODU Inv Fan PCB defect e m m oo S h oS 2 5 sy Error diagnosis and countermeasure flow chart Plus Is noise filter or fuse normal refer electric component part Is transmission LED yellow of inverter fan PCB on No No Replace noise filter or fuse 72942 1291432913 Yes Yes Replace inverter fan PCB Are transmission cables No 4 of Main Fan PCB Re connect transmission cables c connected normally 9 O Yes o m No Is green LED of Main blinks Replace Main n Yes gt Replace inverter fan PCB 9 o Location of inverter transmission connector of ocation of PCB transmission connector of Main PCB and LED Inverter FAN and LED 113 Is fan PCB transmission LED yellow blinking normally Yes No Is inverter PCB transmission LED yellow blinking normally Yes Is fan PCB assembly normal Recheck power and installation condition Checking 15V input 1 Check DC 15V power cable between Inverter PCB and fan PCB 2 Check transmission cable between Inverter PCB and fan PCB Reconnect or replace wire if abnormality found Check transmission cable between Inverter PCB and fan PCB Reconnect or re
55. ED should blink Check Noise filter output Voltage of PCB should be 220V at LGMV Output voltage should be Sensor 5V Cooling fan 220V LEV 12V 152 Counter measure Check fuse 3 15A T N voltage gt resistance is 071009 replace PCB Replace PCB and check connection points Check Main Inverter compressor PCB and connection points Replace Noise filter Replace PCB and check connection points Terminal block Power input REACTOR DC voltage stabilization Check voltage When power is supplied Resistance of connectors amp connection condition 3 2 How to check inverter control box a Plus Voltage of 36 R S T should be within 3802 10 Voltage of 16 R N S N T N should be within amp connection points 2204 1096 Check noise filter Voltage fluctuation should be within 10V fuse While standby and in operation Voltage drop should be within 10V Check supply voltage Checking points of 36 R S Checking points of 16 R N In case resistance is coil is disconnected Replace reactor Resistance of reactor should be within 1 32 When power is not supplied Voltage between terminals of reactor should be within 0 1V When power is supplied Reactor for INV compressor Reactor for INV Fan 153 9po9 10413 yore 10 aping 1291439913 O 5 5 2 2
56. Example H1 01 HRU PCB 200 Check the piping among ODU IDU HRU Equal number of and displayed one in terms of piping Yes Completion of the auto pipe detection Retry auto pipe detection 135 In case of auto pipe detection failure Manual pipe detection Q m O 9 gt Turn on No 1 of SW02M of HR unit Reset the power of HRU PCB Enter central control address into each IDU using its wired remote controller Manually set the address of each valve corresponding with the central control address of IDU connected to the valve Turn on No 6 DIP S W of SW03M of ODU PCB Reset the power of ODU PCB Wait for about 5 minutes The number of IDU installed is displayed No Equal number of IDU and Displayed one Yes Turn off No 6 DIP S W of SW03M of ODU Check the central control address of IDU PCB and HRU Completion of the manual pipe detection Retry manual pipe detection 136 HR Unit PCB Hed 91seg at vale housing irl cooling LED gran 41 heating vate LED ed ms o oo A h oS 2 5 sy 72949 5 1291432913 Green LED blinking Communication OK E e E 5 Dip switch setup ot lor manual valve 7 c S S gt Switch setup of HR Unit 1 Main function of SWO2M 2
57. Is it heating mode Yes Yes is the outdoor unit No Check sol valve Replace outdoor unit PCB measure 220V in port Yes i No 3 gt Replace HR unit valve connector Yes Check HR unit manual pipe address Refer to HR unit manual pipe detection Is HR unit configuration on auto pipe detection Is the pipe detection success during auto pipe detection Set HR unit manual pipe detection Refer to HR unit manual pipe detection Is HR unit valve LED turns on when connected indoor unit start to operate N 9 Replace HR unit Yes Replace HR unit valve coil No Is the resistance value of HR unit valve coil normal Yes Is the HR unit PCB valve measures 220V in port electric component part No Replace HR unit PCB Yes Check HR unit coil assembly location Yes oF 1 Check sol valve coil resistance value 1 85 k2 10 from connected pipes Check blocked HR Unit HR unit valve coil resistance value 1 85 10 73 No Replace HR unit valve coil Hed 91seg mec oo 9 5 49949 juauoduoy 49349 uonnjos 291139913 suonounj 159 1 Low pressure sensor defect 2 Outdoor indoor unit fan defect Plus Sync 3 Refrigerant shortage leakage 35 Main Ertor happens because 4 Deformation because of damage of refrigerant pipe 144 Sub1
58. MULTI Trouble Shooting Guide Book LG Electronics Inc LG Electronics Inc No part of this publication may be reproduced stored in or introduced into a retrieval system or transmitted in any form or by any means electronic mechanical photocopying or otherwise without prior permission of the LG Electronics Inc Air Conditioning Division LG Electronics Inc Contents Search with Error Code number 1 Basic Part 1 1 Unit conversion Energy Pressure 1 2 NOMENCLATURE 1 3 LGMV Guideline 1 4 Temperature vs pressure of refrigerant 1 5 P h Diagram 1 6 Cycle Circuit amp Sensor 1 7 Outdoor Wiring Diagram 2 Troubleshooting Guide for each Error Code Refer page 4 3 Electric Component Check 3 1 How to check main control box 3 2 How to check inverter control box 3 3 How to check Multi V Space control box 3 4 How to check indoor unit PCB 3 5 How to check other electric components 4 Solution Check PC central controller Simple central controller and CNU LG utility setting TeraTerm setting PI485 check PDI check One point service manual 5 Test functions Plus Il 5 1 Sensor checking 5 2 Auto charging 5 3 Auto refrigerant checking 5 4 Pump down 5 5 Pump in 5 6 Vacuum mode Search with Error Code number R Reserved Error Pade Error Error Page Error Pace Error Page Error Pade Error Page code 9 code g code g code g code g code g code g SE
59. Method for addressing valves of an HR unit Auto Manual wns uses 1 Selection of the method for addressing valves of an HR unit Auto Manual Switch No 1 Off Switch No 1 On 137 S21u04329 3 97 2 Selection of the model of the HR unit For 2 rooms For 3 rooms For 4 rooms PRHR020 PRHRO40 40 Initial Setting 12734859738 1 room Connected 2 rooms Connected 3 rooms Connected 4 rooms Connected 2 SWO5M Rotary S W for addressing HR unit Must be set to 0 when installing only one HR unit When installing multiple HR units address the HR units with sequentially increasing numbers starting from O Ex Installation of 3 HR units 138 Manual addressing of valves on HR unit PCB with SWO1M SWO3M 5 04 Hed 21529 Manual addressing of valve 1 Manual addressing of valve 2 Manual addressing of valve 3 10 13 10 apino Manual addressing of valve 4 SWO3M Increase in the digit of 10 of valve address Increase in the last digit of valve address 12942 13ueuoduio5 Je211329 3 Display and setup Setup and Contents o o T o 7 g Operation None Hog T i Display None SWO1M 5 SW04M x A No 1 of SWO1M on to address value 1 gt g g Display Existing value saved in EEPROM is swoiM swo3m swoam 4SPlayed i
60. NIN 251 140 168 06 34 86 108 24 02 34 42 80 2 03 35 43 80 83 1 Basic Part 1 1 UNIT CONVERSION 1 2 NOMENCLATURE 1 2 1 Multi V Indoor Unit R410A ARN Serial Number Combinations of functions A Basic function L Neo Plasma Wall Mounted C Plasma Ceiling Cassette G Low Static ART COOL Type Panel Color B Blue D Wood M Metal R Mirror W White V Silver E Red G Gold 1 Kiss Chassis Name UJ 9 79 o m 10413 10 aping 5 Electrical Ratings 1 19 115V 60Hz 2 10 220V 60Hz 6 10 220 240V 50Hz 7 10 100V 50 60Hz G 19 220 240V 50Hz 220V 60Hz Total Cooling Capacity in Btu h EX 5 000 Btu h 05 18 000 Btu h 18 72942 1291432913 o Combination of Inverter Type and Cooling Only Heat Pump AC Inverter and H P AC Inverter and U DC Inverter and H P and 2 MULTIV System with g Indoor Unit using R410A A 1 2 2 Multi V Plus Outdoor Unit R410A 9 8 2 2 Serial Number Air Discharge Type S Side Discharge T Top Discharge Electrical Ratings 8 30 380 415V 50Hz 9 30 380V 60Hz 30 220V 50Hz 30 220V 60Hz Total Cooling Capacity in Horse Power HP unit EX 4 5HP 45 10HP 100 Combination of Inverter Type and Cooling Only or Heat Pump N Inverter and H P V Inverter and C O H H
61. P Sub Unit C C O Sub Unit B Inverter and Heat Recovery S Heat Recovery Sub Unit MULTIV System with Outdoor Unit using R410A 1 2 3 Multi V Plus II Outdoor Unit R410A i EL Serial Number Air Discharge Type S Side Discharge T Top Discharge 97 D Electrical Ratings 8 30 380 415V 50Hz 9 30 380V 60Hz A 30 220V 50Hz B 30 220V 60Hz L 30 380 415V 50Hz 30 380V 60Hz Total Cooling Capacity in Horse Power HP unit EX 4 5HP 45 10HP 100 Combination of Inverter Type and Cooling Only or Heat Pump Inverter and H P V Inverter and C O H H P Sub Unit C C O Sub Unit B Inverter and Heat Recovery S Heat Recovery Sub Unit MULTIV System with Outdoor Unit using R410A 1 2 4 Multi V Plus II Outdoor Unit R410A ARU 106 L Serial Number Air Discharge Type S Side Discharge H High Temperature T Top Discharge Electrical Ratings 8 380 415V 50Hz 9 30 380V 60Hz 220V 2 220V 60Hz L 30 380 415V 2 30 380V 60Hz Total Cooling Capacity in Horse Power HP unit EX 4 5HP 45 10HP 100 Combination of Inverter Type and Cooling Only or Heat Pump N Inverter and H P V Inverter and C O B Inverter and Heat Recovery MULTIV System with Outdoor Unit using R410A 1 2 5 Multi V Space Outdoor Unit R410A ARU 8 00 Serial Number UJ 9 o 79 o m Chasiss Type V
62. R Mirror W White C Cherry V Silver Chassis Name Electrical Ratings 1 19 115V 60Hz 2 10 220V 60Hz 6 19 220 240V 50Hz 7 10 100V 50 60Hz G 19 220 240V 50Hz 220V 60Hz Total Cooling Capacity in Btu h EX 5 000 Btu h2 05 18 000 Btu h 18 Combination of Inverter Type and Cooling Only or Heat Pump AC Inverter and H P V AC Inverter and U DC Inverter and H P and C O MULTIV System with Indoor Unit using R22 1 2 8 Multi V Plus Outdoor Unit R22 T S Single Unit C O Serial Number Air Discharge Type S Side Discharge T Top Discharge Electrical Ratings 8 30 380 415V 50Hz 314 380V 60Hz A 39 220V 50Hz 30 220V 60Hz Total Cooling Capacity in Horse Power HP unit EX 4 5HP 45 10HP 100 Combination of Inverter Type and Cooling Only or Heat Pump Inverter and H P V Inverter and C O H H P C C O MULTIV System with Outdoor Unit using R22 UJ 9 79 o m 49949 juauoduoy DD JOH 291139913 bune Es a 19349 uonnjos suonounj 159 a 5 F 1 3 LGMV Guideline o bove 2200 1 High Pressure kPa 1100 1800 a below900 2 Low Pressure kPa 300 500 above 600 Cooling below250 3 Indoor LEV Pulse 200 600 Mud 1000 below200 4 Outdoor LEV Pulse 1944 Indoor pipe ae 5 Outlet inlet Indoor pipe m AER en MES 6 Inlet Outlet 8C 15C
63. R unit Sub cooling Abnormal value of sensor Defective temperature sensor connection discharge pipe measurement Temperature sensor defect Open Short temperature Open Short Outdoor unit main PCB defect sensor error 203 HR uniti 207 HR unit2 211 HR unit3 215 HR unit4 219 HR unit5 223 HR unit6 227 HR unit7 231 HR unit8 Error diagnosis and countermeasure flow chart Is the sensor connected to HR unit PCB properly Reconnect sensor to PCB Is the sensor resistance level normal Replace sensor Replace HR unit PCB Sensor resistance 100 k over open or 100 Q below short will generate error Note Temperate sensor resistance vary with temperature So compare temperature sensor resistance value according to outdoor unit temperature by referring below table 5 tolerance Air temperature sensor 10 C 20 7k9 25 10k9 50 C 3 4K2 Pipe temperature sensor 10 C 10k2 25 5k9 50 1 8k2 140 1 Defective connection HR unit power supply and transmission connection 2 Wrong setting of the HR unit Rotary switch and Dip switch 3 Defective HR unit PCB 204 HR unit1 208 HR unit2 transmission transmission 212 HR unit3 216 HR unit4 error between error between 220 HR unit5 224 HR unit6 the HR unit and the HR unit and 228 HR unit7 232 HR unit8 outdoor unit outdoor unit Hed 91seg Error diagnosis and countermeasure flow chart H R unit g
64. SEMIN __ SENSOR CHewP SEM L SENSOR SOLER ABB COLOR AD HEL AL YH YHTE BK BLACK BR BROWN YL YELLOW GREENYELLDW EXCEPT COOLING ONLY MODEL OUTDOOR WIRING DIAGRAM FUSE 250VIT5A BR BLWH BK 30 CHIB E inen ky C7 n 38544203907 1 7 4 HR Unit 00 9 n 79 T 3538838335883 222222222222 555 5 gt SV SV mE 302 0 Rees 280 Te e al la 5 le os Us do do o 75 ES CNUS CHOS CNO 100 11 MAIN BOARD CNIS CN14 7 SEGMENT NW CN19 26 26 i 49949 juauoduoy 291139913 UNIT ID SWOIM E ON SW 2M OFF 3 Lj ZG 3 4 11 Fb il SC OUT 11 e El SC IN CNO3 SCAM LIQUID i 5 TO INDOOR UNIT AC TRANS E uM dr IN 220v TO INDOOR UNIT 2 FIELD WIRING FACTORY o o a 3 o 31
65. Switch Plus IT DC charging voltage When power is supplied Magnet switch Charged voltage of between terminals of capacitor between IPM P N terminal DC link terminals should be more than 450V At the moment of inverter compressor start Check values at both terminal of capacitor When magnet switch is on output voltage should be 380V Running 50 Check input voltage and replace capacitor When output voltage is not 380V Replace PCB Plus 22 1 Compressor damage Plus II 2 Current sensing sensor CT damage 221 222 223 224 3 Low input voltage Hed oiseg inverter The current flowing at the CT 4 compressor terminal is disconnected or loose S Right sensing circuit is more than the 5 Abnormality at the outdoor indoor unit fan 22 Comp P compressor allowable maximum value of the 6 Cover or clogging Outdoor unit covering during cooling mode Left mo a clogged at the indoor during heating E zi be 7 Defective inverter PCB IPM PCB Error diagnosis and countermeasure flow chart oo 9 o9 o p Are the resistance between No 3 each phase and insulation resistance Replace INV COMP 3 m of Inverter compressor normal 5 refer electric component part 52 9 Yes 5 Replace FUSE refer electric component part Replace FUSE
66. Yes ae ieee d refer electric component part Replace Noise Filter Yes Is input voltage of power No supply normal Over 360V Check input voltage amp adjust refer electric component part 2 Yes 5 8 5 Check whether the current Is it working normally with 5 15A of CT current Is CH 22 occurred measured CT during operation is above 18A after reset Plus Sync R phase line Space U V phase line No Replace inverter compressor PCB DC Link voltage is more Capacitor 3phase Diode than 460 V check amp replace refer electric component part refer electric component part Check over charging of refrigerant or whether the filter is blocked of indoor unit heating outdoor cooling or not 51 S31u04129 3 97 Part Function T BLOCK Terminal Block Input power FUSE Protect over loaded current plus Nose filter Noise emit amp protect Check points Check voltage Check 2 In case power is not supplied Check disconnection of FUSE when power is supplied Check disconnection of FUSE when power is not supplied Check voltage When power is supplied Check Q In case power Is not supplied How to check Voltage of 36 R S T should be within Standard 10 Voltage of 16 R N S N T N should be within 220V 10 Voltage fluctuation should be within 10V While stand by and in operation
67. _ 3200 6858 7169 Relative 5 amr Pai 30 169 62 16891 _ 170 30 09 330 02 25 229 70 288 230 2508 2501 20 29957 29846 30 2006 119 99 15 380237 37887 380 1509 15 01 dol 4275 47109 470 10 21 410 12 5 578217 57621 580 498 489 69776 695 58 70 0044 013 5 832 0 8977 830 46 496 10 983944 9843 90 984 9 94 15 1153 09 114222 115 1488 1498 20 134139 1336 98 1350 20 18 2029 25 155025 154526 150 246 25 08 30 178119 _ 177559 _ 1800 30 36 30 47 35 203578 202959 _ 2000 3430 34 42 40 231576 2309 03 230 39 71 39 82 45 2623 00 2615 82 2600 44 62 44 73 50 2959 61 295213 2950 49 84 49 95 55 3328 02 332049 340 551 56 01 GO 373148 372400 370 541 5970 65 417311 4166 98 4200 6528 65 34 70 4746 09 470631 4700 7017 7017 11 1 5 P h Diagram R22 s3Iuo4129 3 97 2 R410A CM ye A 000 LEPTIN 608 ae dian 22222 8 BE OS LS MER 7 AY RE AA AV METTI BS ATA EE HEN ae i LE METH ALTE T Re paa i 100 120 140 10 180 200 220 240 260 280 300 320 340 360 380 40 420 440 460 40 500 520 540 560 580 Enthalpy kJ kg i NI lt P 92 9 D Nt NR ud ua 12 1 6 C
68. ables refer electric component part check fan motor Multi V Plus amp Sync Check Inv the resistance on fan motor connectors Multi V Space Check hall sensor of BLDC fan motor Resistance between cables 18 32 Ha 4 Hb 3 lt gt Gnd 2 24 Resistance between cables LGDC fan 19 7 755 Ha 4 Hb 3 lt gt Vec 1 11 k i 115 Inverter fan IPM PCB Myr 6 a mg gt UNE j 2 DC supply terminal DC310V p a 9 r 3 Outdoor unit fan connectors 1 PWM signal Check 9pin connectors Replace cables amp check 2 Fan DC power DC voltage should be charged of 310V soldering condition of 3 Outdoor While Fan operating in case voltage of PCB fan connector connectors U V V W U W is 100 300V Replace connectors amp gt Normal inverter 4 IPM Check Diode P N 0 95V PCB if not charging P U P V P W 0 55V N U N V N W 0 55V inverter IPM DIODES 2 P U 0 5V 116 Part Function No power on PCB How to check 10 Comm circuit 1 MICOM LED 9 On boarding connector 8 Heat sink temperature sensor connector 7 PWM drive circuit 6 SMPS power circuit 2 39 power Input voltage of 34 4 wires should be Input circuit 34 380V 14 220V Check half wave rectifying circuit diode R Reactor1 0 6V S Reactor1 0 6V T Reactor1 0 6V Reactor 1 10 Yellow LED should
69. agnetic switch Normal Yes Check main power and installation condition 3 4 Running Current COMP start Coil resistance INV const speed comp resistance INV COMP gt 1 29 109o Plus 0 359 10 IT No power Constant speed COMP 0 1 960 1 910 0 1 999 10 U W phases resistance V W phase resistance Insulation resistance No power Compressor connector Comp conector Cooling fan connector Cooling f ior Plus IT 9 ing fan operation IPM bolt connecting 44 Part Function 2 Power amp 3 High pressure 4 DC Link 6 transmission 5 Checking circuit start relay switch amp sensing amp circuit to main for reverse phase drive circuit power relay display circuit PCB of input power We circuit yed e m oo S h oS 2 5 sy 7 On board writing connector I 1 5 MICOM circuit CT sensing circuit 72942 1291432913 9 PWM driving signal output circuit o o c 5 No power 2 Power Input voltage should be 220V Check amp replace fuse 3 15A m at PCB when power is supplied T N voltage 220V 5 Input resistance should be more than a few If resistance value is when power is not supplied 01002 m 0 et gt No transmission 6 Transmiss Yellow LED should blink Check yellow LED blinks or ion c
70. ar at LGMV may have following problems D wrong connection of transmission cable or power cable 2 fault of power PCB transmission cable 3 duplication of indoor unit number If transmission is not doing well wholly then the Auto Addressing is not done The case that CH53 appear at indoor unit also Auto Addressing is not done so indoor unit address may be duplicated After replacement of indoor unit PCB Auto Addressing should be done if central controller is installed then the central control address also should be input in case that only transmission PCB is replaced above process is not needed 89 Plus 54 Main Wrong connection of Wrong connection of power ETE dete 2 No power of R S T supplied 3 Wrong connection of R S T cables 4 Main fuse defect 141 Sub2 155 Sub3 Plus II 541 542 543 544 power supply cable Reverse supply cable Reverse direction direction missing a phase missing a phase Error diagnosis and countermeasure flow chart Is connection and phase order of power cables to main sub outdoor unit correct No Yes s connection and phase order of power distribution panel correct Yes Is CH 54 occurred again after reset MAIN circuit breaker No Yes Is 30 Fuse normal refer electric component part No No Connect power cables in distribution panel correctly Yes Check the diode of inverter
71. cables 11732 11733 11734 Over increase of yed e m oo 9 o9 gt Error diagnosis and countermeasure flow chart Buljooysajqnoly Is resistance value insulation amp phase to phase of corresponding constant compressor normal refer electric component part No Replace constant compressor Yes 72942 2 Is cables connection No Adjust connection of cables of compressor normal 2 a Yes 3 O 8 5 s discharge temperature No E sensor of compressor Replace discharge x normal refer electric temperature sensor component part Yes o 0 et h Is magnet switch No z normal refer electric Replace magnet switch component part 2 Yes Is outdoor air temperature sensor normal No Replace outdoor air temperature sensor cables connection between constant compressor and magnetic switch Replace outdoor unit PCB Yes Puls IT Plus II 11931 11 932 11 933 11 934 Heat sink temperature is over 95 Fan PCB heatsink temperature high 1 Heatsink temperature sensor defect 2 Fan PCB assembly defect Plus II 11941 Fan PCB heatsink 11942 temperature sensor S 2 Wrong connection of temperature sensor ensor 11 943 Abnormal connector 11 944 3 Fan PCB assembly defect 1 Heatsink temperature sensor Heats
72. charge 1unit Additional charge kg Total liquid pipe m 22 2mm x 0 354 kg m Total liquid pipe m 019 05 x 0 266 kg m Total liquid pipe m 015 88 x0 173 kg m Total liquid pipe m 012 7 x0 118 kg m Total liquid pipe m 09 52 x0 061 kg m Total liquid pipe 06 35 x0 022 kg m Number of installed HR units x 0 5 kg 4 Rooms CF kg Correction factor If a negative result is obtained from AD CAUTION If a negative result is obtained from the calculation no refrigerant needs the calculation no refrigerant needs to be added to be added R410A Correction Factor CF Multi V Plus Plus II Multi V Space Cooling Only HP 10 12 14 61820 22 24 26 28 30 32 3 38 40 Product Chargelkg 4 4516 8 je 16 16 16 16 16 24 24 24 24 24 24 24 24 Cg 4 112 2 2 2 fof1 2 3 4 5 Heat Pump HP 556 10 1 16 48120 22 24 26 28 30 32 34 36 38 40 Product Chargelkg 4 4516 8 8 8 16 16 16 16 16 24 24 24 24 24 24 24 24 cg __ 1 2 4 0 li 2 4 1 2 3 4 5 080000000 Model ARUN508RVO Product Charge 958 2 35 9 9 55 3540 9 6 8 t5 1616 16 16 ot ot 24 2e a 28 24 24 19 1112 13 14 15 70 Calcu
73. city or 10 Outdoor unit 2set Model code Main Model code sub capacity or 20 Outdoor unit 3set Model code Main Model code sub1 Model code sub2 capacity or 30 Check the output voltage of terminal socket Checking method for outdoor unit of 3unit system during heating operation 220V 1096 Close all the SVC valves of high low pressure common pipe 2 Operate system 8 Check the difference of high and low pressure with LGMV for each unit Main Subi Sub2 4 If there is a unit in which the difference is not increased then the 4way valve of that unit is defective 128 Plus w 9 D Measure the resistance of 4way valve Location of 4way valve connector on y zi Main PCB marked as 4way CN09 e ms o oo S h oS 2 5 sy 42949 1291432913 Confirm the 4way valve coil is inserted to the end Check the output voltage of terminal socks during heating operation 493y9 uonnjos suonounj 159 When power is supplied in order as follow Slave2 gt Slavei Mater ODU E RUM is displayed one after the other at main PCB 7 segment 1 Modal 5HP 60 6HP 61 8HP 62 10HP 63 12HP 64 14HP 65 2 Total Capacity Displayed with HP 3 ODU Type HEAT PUMP 2 Cooling 0 4 Normal mode 25 5 Refrigerant 410 41 Checking method
74. ct Open Short pis 9 pressie Open Short 3 Outdoor PCB defect 431 432 433 43 4 Error diagnosis and countermeasure flow chart Connect sensor to PCB correctly Replace corresponding pressure sensor Is sensor connected to PCB correctly After replacement of outdoor unit main PCB is the system normal High pressure sensor Low pressure sensor Pressure sensor connection on main PCB e sos LES M a Plus II model 80 Error code Error contents Meaning Main causes Plus 44 Main 1 Bad connection of air temperature 118 Sub1 connector 130 5062 Sensor error of outdoor air Abnormal value of 2 Air temperature connector 159 Sub3 temperature sensor Open Short defect Open Short Plus II 3 Outdoor PCB defect 441 442 443 444 Hed 91seg Plus 45 Main H E A 48 Main H E B 123 Sub1 A 124 Sub1 H E B 135 Sub2 H E A Piping temperature sensor error 1 Pad CO ie ton or ai temperature ms oo 9 eo 136 Sub2 H E of heat exchanger Abnormal value of sensor connector 2 Air temperature connector 164 Sub3 H E A main amp sub outdoor unit heat Open Short 165 Sub3 exchanger A B Plus II 451 452 453 453 H E 481 482 483 484 12942 1ueuoduio5 Je211329 3 Plus a 1 Bad connection of air tempe
75. ct connectors if there are no not work louver 7 CN_POWER2 DC24V display check Check and Replace trance and power supply 10 CN 15 25 Connection status check Check and replace louver motor and connection part 12 CN MOTOR1 2 Connection status check Check and replace louver motor and connection part BLDC motor monitoring method Ha 4 Hb 3 lt gt Gnd 2 24MOhm Ha 4 Hb 3 gt Vcc 1 11KOhm 162 3 4 How to check indoor unit PCB 13 CN POWER power supply 220V 12 DRAIN Drain pump Output part 220v Outdoor unit communication PCB front side 14 CN A5 i indoor PCB connection 11 CAPACITOR internal external 1 CN MOTOR indoor motor 10 CN LEV indoor LEV operation Lu S PEREA Communication Connection A B 2 CN_CC3 DRY CONTA wait 9 VANE1 2 louver operation 3 CN FLOAT Drain pump sensor 4 CN OPTION pipe 6 REMO remote control power amp communication 7 CN HVB plasma 8 DISP reception part PCB connection port Outdoor unit communication PCB backside When there is communication error UO1Y DIODE MODE measurement 8 1 2 3 4 1 2V 5 1 2 3 4 0 7V Monitoring gt PCB remote control 13 CN_POWER power does not come on 14 CN_A5 communication PCB Communication does not work Outdoor unit motor 1 CN_MOTOR does not work 11 CAPACITOR Outdoor
76. e ODU fan motor if abnormality found 1 Check fan PCB connector condition Reassemble if abnormality found 2 Check assemble condition between fan PCB and Heatsink Reassemble heatsink if abnormality found Replace fan PCB assembly N terminal red Open P terminal black U terminal red 35K 10 N terminal red 35K 10 35K 10 V terminal red 35K x 1095 Open 35K 1095 Open P terminal red V terminal black Open 35K 10 Check condition Fan Heatsink assemble position PCB Check aso condition 119 Hed 91seg 203 10 13 y9e3 10 72942 1891199913 5 49349 uonnjos suonounj 159 Multi V Plus II LGDC FAN PCB 5 CN Micom 0 8 Write 2 CN FAN Right 1 CN DC Link CN Heat Sink 6 CN Inverter Communication DC 15V Power Inp 3 CN FAN Left terminal 4 CN Hall Sensor P Right 5 CN Hall Sensor Left FAN motion disabled 1 CN DC LIINK DC 470V 520V displays Check DC Voltage at FAN PCB DC 380V and above are normal terminal more than 380V Normal 2 3 FAN U V W electric flow measurement Replace PCB CH106 stabilize Check up and replace 4 5 CN HALL Check connectors connection and motor SENSOR CH67 Communication does 6 CN COM CH105 Flick LEDO1K Check DC power input not work Check 15V DC power input
77. e sensor connecter cooling inlet outlet resistance valie connection temperature sensor 2 Temperature sensor defect Open Short Plus error Open Short 3 Outdoor unit main PCB defect 11 gt 141 sub cool inlet 12 142 13 143 14 144 11 151 sub cool outlet 11152 11153 11154 Error diagnosis and countermeasure flow chart e Sub cool circuit in the outdoor unit Is temperature sensor connector connections are normal Check and correct connection Is the value of temperature sensor resistance normal Replace sensor Replace outdoor unit PCB Sensor resistance 100 k over open or 100 Q below short will generate error Plus IT Note Temperate sensor resistance vary with temperature So compare temperature sensor resistance value according to outdoor unit temperature by referring below table 5 tolerance Air temperature sensor 10 C 20 7 8 25C 10k2 50 3 4k2 Pipe temperature sensor 10 C 10 25 5 02 50 1 88 Liquid pipe temp sensor Sub cool inlet temp sensor Sub cool outlet temp sensor 116 Hiahpressur sen or Sensor measured value of resistance is Refer CH43 Plus Sub1 gnp abnormal Open Short 117 Sensor measured value of resistance is 118 Outdoor unit air temperature Sensor measured value of resistance is 120 Compressor suction pipe Sensor measured of resistance value is Refer to CH46 Plus 5461 temperature sensor error abn
78. emote controller fault The remote controller did not 2 Indoor unit PCB fault No transmission between cabled remote cohiteller indoor Unie receive the signal from indoor 3 Connector fault Wrong unit during specific time connection 4 transmission cable problem Hed oiseg Error diagnosis and countermeasure flow chart Does the error happens again if the remote controller is replaced Replace cabled remote controller ms 90 9 2 9 gt Does the error occurred when the cable of remote controller is replaced Check connection amp transmission cable 72942 1291432913 Replace indoor unit PCB o If there is no remote controller to replace Use another unit s remote controller doing well 2 Check cable Contact failure of connected portion or extension of cable are main cause Check any surrounded noise check the distance with main power cable make safe distance from the devices generate electromagnetic wave o After replacing indoor unit PCB do Auto Addressing amp input unit s address if connected to central controller All the indoor units connected should be turned on before Auto Addressing o A gt 3 5 5 o 68714119362 1 gt 558714103665 6871410231 5871 10365 7 CN REMO Remote controller c
79. eplace magnet switch a E 7 check point of 1st coil of magnet switch 4 CT Current Current to Check wiring Sensor Constant Compressor 151 b Plus Part Check How to check Counter measure Function points Outdoor MAIN PCB Inverter PCB Comm S21u043129 3 97 D Inv Comp High Pr Switch 3 Sub cooling LEV Const Comp High Pr Switch Const Comp Liquid Valve Inv Comp Liquid Valve AC Fan Power Supply Const Comp Magnetic Switch Hot Gas Sol Valve Constant Comp Heater Inv Comp Heater 4 Way Valve 220V Power Input Jig Power Terminal 220V Defect Check point No power 2 Power terminal at PCB 2 Power terminal 1 D gt 0 D O D gt 0 D 14 Inverter compressor No trans mission 3 AC 220V output to drive valves and Others In case PCB AC power output is 0 LED Inv PCB Communication Terminal Main LEV Constant Comp Current Sensor Reset button On boarding Terminal LGMV Terminal Auto Address Central controller Sub cooling sensor Inv discharge HEX1 2 Sensors Outdoor air Suction temp Constant comp discharge sensor High Pressure Sensor Low Pressure Sensor Communication terminal How to check Input voltage should be 220V when power is supplied Input resistance should be more than a few k when power is not supplied DC voltage of connectors should be various 7V 7V Yellow L
80. essor2 Sub Outdoor unit heat exchanger 135 Plus Sub2 HEX A Sensor measured value is abnormal 136 Plus Sub2 HEX B Sara pipe temperature sensor Open Short Refer to CH45 125 140 Excessive rise in outdoor high Compressor Off due to the high pressure Refer to CH24 Plus Sub2 pressure switch in outdoor unit Outdoor 3 phase power supply Wrong wiring at outdoor unit Plus Sub2 phase reversal phase omission Transmission error between outdoor units 104 Main outdoor unit is not receiving sub Plus Sub2 uu i outdoor unit s signals Refer to CH104 147 149 171 Sub outdoor units are not receiving main unit signals 143 Plus Sub1 TER 145 Plus Sub2 Excessive rise in high pressure Compressor Off due to high pressure sensor Refer to CH34 144 Plus Sub1 146 Plus 5462 Excessive drop in low pressure Compressor Off due to low pressure sensor Refer to CH35 1 Input Voltage in the installation region Low voltage High voltage 3phase 380V 10 Refer to CH25 2 Single Phase 220 10 148 Plus Sub1 150 Plus Sub2 Outdoor voltage sensing error Measured value is abnormal Open Short Refer to CH49 147 Plus Sub1 149 Plus Sub2 126 Plus 151 Plus II Encierro Function error of 4way 1 Wrong operation of 4way valve because of sludge etc inflow reversing valve in 2 No pressure difference because of compressor fault Main or Sub outdoor 3 Wrong installation
81. ge unequally at indoor unit 10 seconds etc Error diagnosis and countermeasure flow chart Check abnormal wiring between Inverter PCB assembly amp 5 bridge diode misconnection disconnection P 9 Rewiring if abnormal wiring found Yes Check R S S T T R phase voltage is 380V 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 Yes Does indoor unit power No WENTE bridge R S T phase equally Bridge R N S N T N voltage equally Yes Is inverter PCB No assembly normal Replace inverter PCB assembly Yes Recheck power and installing condition Measuring input voltage Inverter PCB amp Bridge Diode wiring p s O lt I Mb AOL LE Checking joining condition d y P EL E LE 102 Offset of micom which senses Plus II Es CI ssnsabeitor the 1 Input voltage is abnormal not 15V 751 752 753 7544 fan motor phase current is not 2 Fan PCB assembly defect 00 D o o y m 2 5 5 Error diagnosis and countermeasure flow chart mes Check 15V wire connection 390 Reassemble manage if abnormality found 30 955 Yes 22 o za Is Fan PCB assembly normal Replace Fan PCB assembly Yes Recheck power and installation condition 72949 juseuoduio93 1291432913 Checking 15V 49
82. hould blink ssion circuit to main fan PCB No transmission Fan Main PCB When red LED is on PWM is normal Inverter compressor PCB Error 48 5 Port from Diode 6 Port from Reactor 7 On board writing connector 8 CT sensing circuit 9 Power relay 10 Comm port amp LED 11 PWM driving signal output circuit T N voltage 220V If resistance value is 071009 replace PCB Check LED blinks or not When is OFF check transmission with main fan PCB Check error code displayed at main PCB Part Function Check point IPM Check voltage fi amp resistance of malba I AL ox e mu CA each phases CH21 When power CH22 is not supplied yed lt Plus IT P U 28kQ 10 P V 28kQ 10 P W 28k9 10 Reverse P U Open P V Open P W Open e m oo oS 2 5 ET 72949 5 1291432913 N U 28kQ 10 N V 28k2 10 N W 28kQ 10 Reverse N U Open N V Open N W Open Check power A Heat sink Supplay and q cooling fan operation o status 3 3 Plus II 4 2 2 pr 9 3 ES i z S o Position of cooling fan Heat sink cooling fan 2 drive connector PCB 220V output 49 Capacitor To charge DC voltage for inverter compressor Plus IT Magnet
83. ink defect Open Short Temperature Error diagnosis and countermeasure flow chart No Check connection of heat sink temperature connector Is temperature sensor inserted to fan PCB Yes Is temperature sensor ins Check connection condition of attached to heat sink heat sink and temperature sensor Yes Check heat sink temperature No sensor wire disconnection Is termperature Measure temperature sensor sensor normal resistance 10kQ2 5 at 25 gt Replace the sensor if abnormality found Yes No Replace fan PCB assembly Fan heat sink connection Is fan PCB assembly normal Yes Recheck power and installation condition Check connection condition Checking temperature sensor disconnection 132 After the Auto operation if the number of the indoor units detected is different from the number communicating indoor unit Pipe detection error failed to search pipe connected to HR unit valve of marked number Ex H1 02 gt no 2 valve pipe of no 1 HR unit failed to search Pipe detection error Error diagnosis and countermeasure flow chart H R unit green LED communication LED blinks periodically No Yes Check H R unit Rotary switch and Dip Switch setting Yes Operate auto pipe detection after the pipe is sufficiently refrigerated after resetting outdoor unit and HR unit 30 minutes before Yes Is the Auto pipe detection No Success
84. ircuit not a to main When is OFF check 9 PCB transmission with main and replace Malfunction of Green LED should blink Replace PCB inverter compressor Check IC port coupler of PWM drive when power is not supplied 1 2 Diode 1 0V 2 3 Diode 1 4V Inverter compressor Red LED When red LED blinks Check error code displayed at PCB Error Error displays about inverter compressor PCB main PCB 45 S91u043129 3 97 D Part Function Check point Check voltage resistance of each phases When power is not supplied P U DIODE 0 4V P V DIODE 0 4V resistance a few resistance a few N U DIODE 0 4V resistance a few resistance a few M Sub PCB Check the IPM terminal connecting condition Heat sink cooling fan Plus Nl P W DIODE 0 4V resistance a few E EJ ail N W DIODE 0 4V resistance a few Position of cooling fan Heat sink cooling fan drive connector in main PCB 46 Part Function Capacitor To charge DC voltage for inverter compressor Plus Magnet Switch Plus Check points Electric capacity when power is not supplied DC charging voltage When power is supplied Magnet switch 1st coil Magnet switch connection check In case power is not supplied How to check Electricity capacity of capacitor must be 2600 2800 F and the resistance of capacitors
85. lation of additional refrigerant amount R22 Multi V Plus A Product Charge kg Additional charge Kg Total liquid pipe m 22 2mm x O A kg m Total liquid pipe m 1419 05mm x O 3 kg m Total liquid pipe m 815 88mm x 0 2 Total liquid pipe m 12 7mm x 0 12 kg m FION Total liquid pipe m 9 52mm x 0 06 kg m Total liquid pipe m 6 35mm x 0 025 kg m M m m CF kg amp Outdoor Unit 26 35 10m Correction Factor B Indoor Unit 66 35 10m 612 7 60m 26 35 10m flee AO e Palencia 520 52 20m 10m Additional Charge A 0 12 Bx 0 06 C x 0 12 A CAUTION a b c d e x 0 025 60 x 0 12 20 x 0 06 20 x 0 12 Refer to Outdoor Units Information due to differ 10 x 5 x 0 025 1 CF Correction Factor as the Outdoor Units 11 05 kg R22 Correction Factor CF 55 6 m Las as 39 2 2 we me 2 2 2 0 2 Product kg 10 10 10 20 20 2 Cool LAB 10 220v DES CF kg 2 1 al 2 2 Pump 0 50 CF kg Product kg Cool 20 60 Only O 50Hz a roduct kg Heat 71 Hed 91seg I oo 9 o9 2S 72942 juauoduoy 493249 uonnjos 291139913 suonounj 159 1 High pressure sensor defect 2 Indoor or outdoor unit fan defect 3 Deformation because of damage of
86. ment Open Short ompressor2 164 Plus Sub3 HEX A Pipe sensor error of the main and Abnormal resistance value of sensor Refer to CH45 165 Plus Sub3 HEX B sub units heat exchanger A B measurement Open Short Abnormal resistance value of sensor measurement Refer CH113 Open Short Refer to CH41 Sensor error at the outdoor Teb PUG SUDE liquid refrigerant pipe 167 Plus Sub3 sub cooling inlet Outdoor unit sub cooling sensor Abnormal resistance value of sensor 168 Plus Sub3 sub error at inlet outlet measurement Open Short cooling outlet 169 Plus Sub3 Excessive rise in high pressure el eel Om ale Hoste nh pressure Refer to CH34 170 Plus Sub3 Excessive low pressure drop 222 Off due to the low pressure Refer to CH35 1 Input voltage in the installation region 3phase 380V 10 Refer to CH25 2 Single phase 220V 10 172 Plus Sub3 Outdoor voltage sensing error Abnormal resistance value of sensor Refer to CH49 measurement Open Short Refer to CH114 171 Plus Sub3 Excessive Low voltage High voltage 130 Plus 173 MAIN constant 174 175 subi constant 1 2 1 Constant compressor defect temperature 2 Discharge temperature sensor defect 176 177 Abnormal staring of 3 Outdoor temperature sensor defect sub2 constant 1 2 constant compressor 2 2 4 Outdoor defect Plus II Fin 5 Magnet switch defect 11731 6 Wrong connection of constant compressor
87. mperature Sensor valve Pressure Switch C Strainer 14 1 6 1 3 Outdoor Unit Plus 8 14HP Plus II 10 16HP e a i Indoor HEX EEW Fan DC Fan NM Temperature I Sensor Pe DICE FCD EE DD D DO ie _ e e __ DD GNU 4 1 D DOCTUS D CHAUD DD SUC i ONE D DO D ENS TOC Em qd ER Outdoor Unit __ Temperature 8 Sensor 78 High Pressure Sensor Suction Sensor Temperature Sensor Sub ooling Circuit Inlet Temperature Sensor oS A 1 Sub Coaling EEW B Temperature Sensor Os Pressure Switch x SVG Valve 4 Way Valve bo Temperature _____ _____ umi __ end mm t em Ss m m Dn B 4 High Temp High Pressure Gas High Temp High Pressure Liquid Low Temp Low Pressure Gaa 4i Temperat Sensor re Qutdoor Unit iin nn Solenoid Valve Strainer 15 UJ 9 79 o m 49949 juauoduoy TOT Je21329 3 Sen EAE 49349 uonnjos suonounj 159 1 6 1 4 Sub Outdoor Unit Plus 8 10 12 14 HP Comp Compressor LEV Linear Expansion Valve QNS Oil Separator Accum Accumulator Subcooling Circuit Heat Exchanger Heat Exchanger A
88. n 7 SEG o Opeation Set the digit of 10 to the number in E Group High data of the wired remote control UBL connected to the corresponding indoor unit to the valve 1 by press SWO3M S W SWOLM SIM Display Digit increasing with the times of press SWO3M S W is displayed in left 7 SEG Operation Set the digit of 1 to the number in Group Low data of the wired remote control EE a connected to the corresponding indoor unit to the valve 1 by press SWO4M SWO1M SWO3M Display Digit increasing with the times of press SWO4M S W is displayed in right 7 SEG Operation No 1 of SWO1M off to save the g O address of valve 1 Display 11 displayed 7 SEG disappears SWO1M SW03M SWO4M 139 201 HR unit1 205 HR unit2 HR unit liquid 209 HR unit3 213 HR unit4 pipe Abnormal value of sensor 217 HR unit5 221 HR unit6 temperature measurement Open Short 225 HR unit7 229 HR unit8 sensor error 1 Defective temperature sensor connection Temperature sensor defect Open Short Outdoor unit main PCB defect HR unit Sub cooling inlet pipe temperature sensor error 202 HR unit1 206 HR unit2 210 HR unit3 214 HR unit4 218 HR unit5 222 HR unit6 226 HR unit7 230 HR unit8 Defective temperature sensor connection Temperature sensor defect Open Short Outdoor unit main PCB defect Abnormal value of sensor measurement Open Short H
89. n of Fuse is disconnected FUSE Replace FUSE when power is not supplied ms oo 9 o9 o 5 Nose filter Check voltage Voltage of each connector R R S S T T should case of 220V Noise emit amp when power is be within 0 40V It is disconnected protect Supplied gt Replace noise filter Plus Plus II 12942 uonnjos us suonounj 159 outputil wer part Input upper part Check 2 Resistance of each connectors R R S S T T In case resistance is When power should be within 07109 noise filter is Is not supplied disconnected gt Replace noise filter 77 S291u04329 3 97 D Error code Error contents Meaning Main causes Plus 41 Main inverter compressor Plus 11 411 412 413 414 SPACE Right Comp N1 Plus 47 Main constant compressor Compressor 1 Connection of the compressor defect 121 Sub1 constant compressor 1 discharge pise Sensor measurement discharge pipe temperature sensor 122 Sub1 constant compressor 2 temperature valve is abnormal 2 Discharge pipe compressor sensor 133 Sub2 constant compressor 1 Open Short of the compressor open short defect 134 Sub2 constant compressor 2 3 Outdoor PCB defect 162 Sub3 constant compressor 1 163 Sub3 constant compressor 2 Plus IT 471 472 473 474 Constant compress Error diagnosis and countermeasure flow chart
90. n power is supplied Check disconnection of FUSE when power is not supplied Check voltage When power is Supplied Check 2 In case power Is not supplied Check voltage Voltage of 30 R S T should be within 3802 1096 Voltage of 16 R N S N T N should be within 220 10 Voltage fluctuation should be within 10V While stand by and in operation Voltage drop should be within 10V ae Resistance of R S S T R T R N S N should be more than a few ke Resistance of T N should be within 40 500 Main transformer of outdoor Voltage of fuse should be within 0 1V Checking points of R fuse Resistance of fuse should be within 0 12 Voltage R R S S T T lt 0 10V gt If voltage is higer than 10 40V check resistance Plus Plus IT Noise Miter outpuiiwer Nols Tiler Input upper part Checking points of Voltage Resistance of each connectors R R S S T T should be within 0109 56 Check supply power and connection condition Check short or not of Control box Noise filter PCB cables Replace transformer In case of 220V Fuse is disconnected Replace FUSE In case resistance is Fuse is disconnected gt Replace FUSE In case of 220V It is disconnected Replace noise filter In case resistance is noise filter is disconnected Replace noise filter 24 Plus High pressure switch defect 24 1 4 Plus IT Fan defect of indoor unit or outd
91. normal FAN motion disabled 2 DC 13 CN FAN U V W electric flow measurement CH106 stabilize 11 CN SENSOR Check connectors CH67 Flick LEDO1K check connector and PCB power supply communication communication does 6 CN COMM not work CH105 Louver does not 4 SW SEL Check if connector is connected work DC24V display check 7 POWER2 Connection status check 10 M1S M2S Connection status check 12 MOTOR1 2 118 Input voltage 220V Replace related parts Check and replace CAPACITOR Replace PCB Check up and replace connection and motor Check PCB power supply 220V Check and replace connector and PCB connect connectors if there are no louver Check and Replace trance and power supply Check and replace louver motor and connection part Check and replace louver motor and connection part Error diagnosis and countermeasure flow chart Plus Is fan motor assemble No condition normal Yes No Is fan motor wire connection condition normal Yes Is fan PCB assemble No condition normal Yes No Is fan PCB assembly normal Recheck power and installation condition Check ODU fan motor assemble condition and locking Reassemble or replace if abnormality found 1 Check fan motor U V W connector connection condition Reassemble wire if abnormality found 2 Check fan motor wire disconnection Replac
92. ns 1 indoor unit OFF Push BLACK button for 3 sec display 01 0P by turns gt gt A few sec later display 01 ON by turns 1 indoor unit ON Push RED button for 1 sec 2 display 02 OF by turns 2 indoor unit OFF gt go on 1 SAVE MODE No 1 ON RESET Target high pressure down target low pressure up 91seg 9po2 10413 y9B9 JO opino 12914 2913 o o 2 CAPACITY UP No 2 ON gt RESET 5 Target high pressure down target low pressure up S O 12 Heating operation No 1 No 2 ON z control Same process as cooling operation e Inverter compressor BACKUP No 3 ON RESET operation while inverter compressor failure operate more than indoor unit capacity SINGLE 70K SERIES 110K Constant No 4 ON 2 RESET 5 compressor 1 BACKUP operation while constant compressor failure operate more than indoor unit capacity SINGLE 70K SERIES 110K a MAIN UNIT No 3 No 4 ON gt RESET when MAIN unit failure 2 5 Cooling operation LOCK No 5 ON RESET locking cooling operation mode 6 0 Heating operation LOCK No 6 ON RESET locking heating operation mode Forced oil return operation No 7 ON gt Push BLACK button for 2 sec gt display 01 return 2 Sub unit Constant compressor 1 BACKUP No 3 ON gt RESET operation while constant compressor1 left failure operate more than indoor unit capacity SINGLE 70K SERIES 1
93. nverter EEPROM insertion direction Same direction both socket hole and EEPROM hole Note Replace after power off 109 2913 97 Error code plus 100 101 Sub1 102 103 Sub2 152 153 Sub3 Over increase of constant Compressor is off because of compressor discharge Over increase of constant compressor discharge Refer to CH33 temperature of Sub outdoor temperature of Sub outdoor unit Discharge temperature sensor of constant compressor in the sub unit 110 Plus 104 Main 111 Sub1 142 Sub2 Transmission 1 Loose connection of power cables Hed 91seg Master displays ODU number which is not communicated Slave displays own error number 156 Sub3 Error Plus II Between 011 041 Outdoors 011 042 011 043 011 044 transmission cables Open Short 2 Each outdoor unit PCB defect 3 Defect of PCB power Error diagnosis and countermeasure flow chart Plus e m m oo A h oS a5 sy Does transmission LED Red of corresponding ub PCB blinks refer electric component part Is PCB input power of transformer PCB power fuse normal refer electric component part Check and replace corresponding parts Input power Replace related SUB PCB 72949 juseuoduio93 1291432913 2 s transmission cables c of outdoors connected Re tt o bl o correctly refer electric
94. oblem Check if the transmission cable is properly connected to indoor outdoor terminal block No Re connect transmission cable Yes Outdoor PCB fault Replace after checking Indoor PCB fault Replace after checking Tf the DC voltage between transmission terminal A B Tf the DC voltage between transmission terminal A B of outdoor unit is fluctuate within 9V 9V then of indoor unit is fluctuate within 9V 9V then transmission from indoor unit is normal transmission from outdoor unit is normal 38 Indoor unit outlet pipe Indoor unit outlet pipe temperature Refer to CH02 temperature sensor error sensor open or short 91seg 1 Indoor units are in different mode 2 PCB fault 3 Wrong setting of wired remote controller or remote controller fault The Indoor units started later are operated in different mode from earlier one Indoor units are not running in same mode Error diagnosis and countermeasure flow chart oo 9 o9 p 15 disappeared after set operation mode same Is operation mode of outdoor amp Indoor units same Replace Indoor 12942 Je211329 3 Wired remote controller Adjust outdoor main PCB dip switch setting Mode Select e Cooling On Group Control Select e
95. of inverter compressor PCB 62 HestsinKoverheat Heal sik over neat 3 Loose connection of connector of cooling fan 4 Defect of temperature sensor of heat sink Error diagnosis and countermeasure flow chart Is resistance value of cooling fan coil correct refer electric component part Does cooling fan rotate while compressor operation Replace cooling fan Yes Replace main PCB Is value of sensor resistance normal Replace sensor Replace inverter fan PCB Heat sink temperature sensor 5 tolerance 10 C 20 0k8 25 C 10 0k2 50 C 3 5k 85 C 1 0k2 Position of cooling fan drive connector in main PCB Heat sink cooling fan E E a Heat sink temperature sensor connection Check DC 12V output during inverter compressor operation 94 Heat sink temperature 1 Loose connection of temperature sensor connector 2 Temperature sensor defect Open Short 2 Fan Main PCB defect Abnormal value of sensor sensor error of inverter Open Short control PCB yed oiseg Error diagnosis and countermeasure flow chart Is sensor connected to PCB correctly Connect PCB to sensor ms oo 9 o9 o 2 9 gt Is value of sensor Replace sensor resistance normal 72942 1291432913 Replace inverter fan PCB o
96. oltage of fuse should be within 0 1V Resistance of fuse should be within 0 12 146 Check supply power and connection condition Check short or not of Control box Noise filter PCB cables Replace transformer In case of 220V Fuse is disconnected Replace FUSE In case resistance is co Fuse is disconnected Replace FUSE a Plus Part Check How to check Counter measure Function points yed Nose filter Check voltage Voltage of each connector R R S S T T should In case of 220V Noise emit amp When power be within 0 40V It is disconnected protect is gt Replace noise filter Supplied 10413 104 aping Buljooysajqnoly Plus II Check 2 Resistance of each connectors R R S S T T In case resistance is In case power should be within 0 1092 noise filter is Is not supplied disconnected Replace noise filter 1291439913 Magnet Magnet switch When check resistance of 1st coil of magnet switch In case resistance is o switch 1st coil resistance should be 0 47 k amp or O Q o When power is not supplied gt Replace Magnet S When magnet switch is on voltage should be 220V switch When power is not supplied 9 When voltage is not m 220V magnet switch is melt down Replace magnet switch 0 et 5 ct check point of 1st of magnet switch Magne
97. ommunication wires between outdoor units and Dip switch setting 3 Step 3 PCB error check After 40 sec error check begins Main unit All errors of units including Slave units are displayed in 7 segment If communication between main PCB and inverter PCB isn t normal 52 is displayed in 7 segment If communication between main PCB and fan PCB isn t normal 105 is displayed in 7 segment If error is displayed check corresponding wires B Sub unit After 40 sec LED1 blinks once per second If electric phase is reversed or missed LED6 is on Other LED except LED1 must be off in initial setup steps 4 Step 4 Auto addressing of indoor units Auto addressing begins when address red button in Main PCB is pressed for 6 sec During auto addressing 7 segment on main PCB displays 88 After auto addressing the number of indoor units is displayed in 7 segment for 30 sec The address of each indoor unit is displayed on each wired remote controller ON 2 3 4 5 6 7 8 9 10 11 12 13 14 e e 6 sec 35 indoor units found Auto address process is finished Every indoor unit displays its address on wired remote controller and the 7 segment of main PCB is off 167 410443 neg 21529 yore 10 aping 1291439913 O 5 2 49349 uonnjos suonounj 159 o S21u04329 3 97 b Plus Outdoor
98. onnection x The can differ from model to model Check from the right source Checking transmission cable connection status 35 s3Iuo4129 3 97 1 Drain pump float switch fault 2 Improper drain pipe location clogging of drain pipe Float switch is open due to rising of Drain pump error condensate water level because of drain pump fault or drain pipe clogging 3 Indoor unit PCB fault Error diagnosis and countermeasure flow chart s the drain pan filled No Is Float switch short No half with condensate On measuring its Replace float switch water half level of resistance float switch Yes Yes Replace Indoor PCB or reconnect the connector drain pump working In indoor unit 0 D i o Sound drain noise 2 0 Replace indoor unit contact etc 220V output Yes Yes Replace Drain Pump No Check the drain head height and slope Yes Checking float switch Remove it amp clean the pump Drain pump blocked by foreign particles Low position gt short 0 ohm If the float goes up higher than a half of float switch then the circuit is open amp the unit is stopped automatically Condensate water 36 A Point to check rotating Indoor PCB drain pump connector Check input of 220V Marked as CN DPUMP Float switch connector Float switch Housing CN FLOAT Standard of drain pipe head
99. oor unit Check valve of compressor clogged S Ni Right Pipe distortion due to the pipe damage 24 Comp Refrigerant overcharge yed A Excessive rise of Compressor off due to LEV defect at the indoor or outdoor unit Left discharge pressure in the high pressure Covering or clogging 24 Comp outdoor compressor Switch in outdoor unit Outdoor covering during the cooling mode Indoor unit filter clogging during the heating mode plus 8 SVC valve clogging 109 Sub1 9 Outdoor PCB defect 140 Sub2 10 HR unit valve coil defect Multi V Sync 154 Sub3 11 HR unit PCB defect Multi V Sync ms oo 9 0 p Error diagnosis and countermeasure flow chart S high pressure switch connector connected to PCB No Connect securely Yes 12942 Je211329 3 S high pressure switch connector short during off No Is high pressure switch terminal short No Replace high pressure switch Yes Replace connecting cable Is SVC valve open Ne Open SVC valve Yes lt 429u2 uonnjos No Re check momentary problem or not Is this error appeared again after reset suonounj 159 Yes Is high pressure more than 2500kPa at manifold gauge No Replace PCB CH24 inverter compressor PCB CH109 154 sub unit PCB Yes
100. or temperature sensor Plus II model 82 plus 49 Main The measured value of the 1 Abnormal input voltage sensor is not 2 Outdoor line fuse damage normal Open Short 3 Outdoor main PCB defect Outdoor voltage 148 Sub1 sensing error 150 Sub2 172 Sub3 Error diagnosis and countermeasure flow chart is the power input normal 3 phase 380V 10 single phase 220V 10 Check power supply Is the power input to the outdoor PCB 220V 10 Change main PCB of outdoor Check Line Fuse of MAIN PCB Plus Check Line Fuse of MAIN PCB Plus 72942 291139913 Check the fuse and wiring Part Check How to check Counter measure Function points T BLOCK Check voltage Voltage of 36 R S T should be within 3804 1096 Check supply power and Terminal Voltage of 1 R N S N T N should be within connection condition Block Input 2203 1090 power Voltage fluctuation should be within 10V While stand by and in operation Voltage drop should be within 10V e f i eh Check Q Resistance of R S S T R T R N S N should be Check short or not of In case power more than a few kQ Control box Noise filter PCB cables Resistance of T N should be within 40509 Replace transformer Main transformer of outdoor is not supplied 83 Hed 21529 ms oo 9 o9
101. ormal Open Short 121 Plus Sub1 constant compressor 1 Compressor discharge pipe Sensor measured value of resistance is Hed 21529 ms oo 9 o9 o 5 Buizooys jqnolL 122 Plus Subi temperature sensor error abnormal Open Short RETE TO CHAL constant compressor 2 123 Plus Sub1 HEX A Sub outdoor unit heat exchanger Sensor measured value of resistance is Refer to CH45 124 Plus Subi HEX B A B pipe sensor error abnormal Open Short 12942 Je211329 3 o 2 125 Outdoor liquid pipe cond 5 d val f resist i utdoor liquid pipe condenser ensor measured value of resistance is 5 Plus Sub1 abnormal Open Short Refer to CH113 3 2 o 126 Plus Sub1 Sub cool inlet Outdoor unit sub cool inlet outlet Sensor measured value of resistance is Refer to CH114 127 Plus Sub1 sensor error abnormal Open Short Sub cool outlet 3 2 5 128 Sensor measured value is abnormal Plus Sub2 High pressure sensor error Open Short Refer to CH43 5 o 129 Sensor measured value is abnormal 130 Outdoor unit air temperature Sensor measured value is abnormal Refer to CH44 Plus Sub2 sensor error Open Short 132 Compressor suction temperature Sensor measured value is abnormal 133 Plus Sub2 Const compressor1 Compressor discharge pipe Sensor measured value is abnormal Refer to CH41 134 Plus Sub2 Const temperature sensor error Open Short compr
102. pen or connection defect NOISE occurs CNU defect Temporary error of Timing mismatch 12942 Je211329 3 Central controller T No response from air conditioner NOISE occurs 252 Disconnection Error A C product defect o pie PI485 communication cable open connection defect S 5 5 Error diagnosis and countermeasure method x 1 Check system setting address of central controller and actual address is matched or not 2 Re start service program engine of central controller d 3 Replace CNU gt 5 e 5 143 3 Electric Component Check MID LG Electronics Inc 90432 913 97 D T BLOCK Check voltage Terminal Block Input power Check Q In case power is not supplied FUSE Check Protect disconnection over of FUSE loaded when power current is supplied Check disconnection of FUSE when power 15 not supplied 3 1 How to check main control box a Plus Voltage of 3 R S T should be within 380 1096 Voltage of 16 R N S N T N should be within 2203 109 Voltage fluctuation should be within 10V While stand by and in operation Voltage drop should be within 10V Resistance of R S S T R T R N S N should be more than a few ke Resistance of T N should be within 40 502 Main transformer of outdoor V
103. place wire if abnormality found No Fan PCB assembly Replace inverter PCB assembly Fan transmission connection Transmission connector Transmission LED Note Check fan PCB assembly Error LED blinking Check 10817 Error Fan Error LED Error LED FALTA 114 Plus 106 Plus II 11 061 1 Overload operation Pipe 12062 clogging Covering EEV 13 063 IPM protection circuit defect Ref overcharge 14 064 Over current of Main outdoor activation 2 ODU fan motor assemble condition abnormal fan motor inverter fan IPM fault over current Coil disconnection Short Insulation damage Ni Right overheating 3 Fan PCB heatsink assemble condition 106 Fan abnormal 4 Fan PCB assembly defect N2 Left 106 Fan Error diagnosis and countermeasure flow chart Plus S P A C E e ms m o oo S h oS 2 5 gt Is it Multi V Space 2 Multi V Plus amp Sync 72949 juseuoduio93 1291432913 Is inverter fan IPM PCB No Al normal refer electric Replace inverter fan IPM PCB component part Yes o 2 Is inverter fan PCB No S Normal refer electric Replace inverter fan PCB 9 component part 5 Yes z Is inverter fan motor No Normal refer electric Replace inverter fan motor component part o h Yes A E 7 Adjust connection after check PWM signal c
104. put voltage Noise filter output lower part Noise filter input upper part 63 Hed 21529 oo A h oS 2 5 sy 22942 uonnjos suonounj 159 90432 913 91 D 1 Overload operation Pipe clogging Covering EEV defect Ref 29 Master 291 Inverter compressor over Inverter compressor input current current is over 30A overcharge 2 Compressor damage Insulation Slave damage Motor damage 292 3 Input voltage low Slave2 4 ODU inverter PCB assembly damage 293 Error diagnosis and countermeasure flow chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 15 installation 3 Check EEV connector assemble condition normal condition normal operation 4 Check refrigerant pressure Reassemble or manage if abnormality found 1 Check resistance between each terminal of compressor 0 34 0 35 1795 2 Check insulation resistance between compressor terminal and pipe over 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 No 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
105. r Inverter Error LED T Phase Terminal To Diode Inv On boarding terminal Fan PCB Communication U V W Output terminal GD Main PCB Communication QD Main Fan PCB Communication LED No power 2 Power Input voltage should be 220V T N voltage 220V at PCB when power is supplied Input resistance should be more than a few If resistance value is 0 10 when power is not supplied replace PCB No transmission 10 Transmissio LEDs should blink Check LED blinks or not Main PCB n circuit to When is OFF check Fan PCB main fan PCB transmission with main fan PCB Inverter 12 PWM LED When red LED blinks Check error code displayed compressor PCB PWM is normal at main PCB Error 158 b Plus Check How to check Counter measure meon points Inverter U terminal V terminal W terminal U terminal V terminal W terminal fan PCB Hed 91seg 325 oos ay 955 922 3 29 52 o2 gt DC connector o o 5 DC link R voltage check P terminal black N terminal red S and IPM V terminal red 4 35K Q 10 PM check After mis W terminal red 35K 10 22 disconnecting 77 3 P terminal red N terminal red U terminal black 35K 10 V terminal black 35K 10 o W terminal black 35K 10
106. r blocked pipe Error is generated if the resistance is more than 5M9 open and less than 2 short Note Standard values of resistance of sensors at different temperatures 5 variation 10 C 362k2 25 200k2 50 82k 2 100 C 18 5k2 Check the resistance of constant compressor discharge temperature sensor Check the resistance inverter compressor discharge temperature sensor Check the resistance of constant compressor discharge temperature sensor 67 Hed 21529 m oo S h oS 2 5 sy 429u2 uonnjos eu suonounj 159 Check outdoor unit LEV 2 4 around 3009 CD 5 around 1502 2 6 around 3002 4 around 1502 Hot gas by pass Valve Connector resistance 1 85 kQ 3 1096 Liquid by pass valve Connector resistance 1 85 kQ 1096 68 Hot gas by pass Valve Connector resistance 1 85 kQ 1096 Liquid by pass valve Connector resistance 1 85 kQ 10 69 21529 e ms m oo oS gt 429u2 uonnjos up suornounj 159 S9140 119913 97 D Calculation of additional refrigerant amount R410A Multi V Plus Plus II amp Space R410A Multi V Sync Total liquid pipe m 22 5 2 x 0 06 x 0 0229 Correction Factor Product
107. r data Central controller to CNU data transmission error Sending error transmission failure Central controller receive buffer overflow In excess data receive 1 Defective CNU 2 Initialization failure of central controller Central controller receive time out transmission failure Receiving time 3sec 7 between central controller and CNU Data sending failure from central 1 CNU defect Central controller Send Timeout controller to CNU within designated 2 Initialization failure of central time controller Data receiving failure of central 1 CNU defect Central controller Receive Timeout controller from CNU within 2 Initialization failure of central designated time controller 142 1 NOISE occurs 2 CNU defect Central controller Received check sum is different from 3 Temporary error of Timing mismatch Check sum Error calculated check sum data 4 A C product defect 5 PI485 communication cable open or connection defect Hed 91seg NOISE occurs CNU defect Temporary error of Timing mismatch A C product defect PI485 communication cable open or connection defect Central controller Receive Zero Error Length of received data 0 ms oo 9 o 2S 5 Buizooys jqnolL CNU defect Central controller Setting address and actual address Temporary error of Timing mismatch Wrong Address Error are different each other product defect PI485 communication cable o
108. r pe 21 Q m O 3 1 Outdoor Wiring Diagram 1 7 1 Multi V Plus 1 7 1 1 Multi V Plus Main Unit 9 mm TO MAIN BOARD Bee Bee eos ERE rx 1 s oot m 4 E i PUSE l BK pr e LA L 1 e RI ESI i m Eram BE FAN jim BOARD UNA INVERTER T m BOARD nd FH ELS 3 NE E Teen Ilii rol eui Leva E 5 FAN AD E 5 HEAT SINK al I ed NOTE 1 AME VALUE a 1 sme suc gesout am Sempr wonowweraesanon COLOANOTE TO NOISE FILTER QUT CONDERSORT SENSOR APEC TE AD REO CMETSD DUT DT TEMP BUBGOCL I TEMP SENSOR WH OQ WHITE HOE E INV COMP ER 2 TS OPN LP o YELLOW oa TT 3854A20390M HEAT SINK FAN Dc FAN INVERTER BOARD TO FAN BOARD os J Bae a __ TO TB aud SR SP 1 V
109. rature 132 Sub2 Compressor suction Abnormal value of 4 rature connector o 161 Sub3 temperature sensor error sensor Open Short dete Open Short Plus II 461 462 3 Outdoor PCB defect 9 463 464 Plus 47 constant compressor of main outdoor unit Plus II Discharge piping temperature zi 471 472 473 474 sensor error of constant Space Abnormal value of sensor pafa to CH41 9 Open Short ct Inv compressor Main unit gt Left SPALE Comp N2 5 Piping temperature sensor error Plus 48 of heat exchanger in main amp Abnormal value of sensor Refer to CH45 Heat exchanger B sub outdoor unit heat Open Short exchanger B Error diagnosis and countermeasure flow chart Is sensor connected to PCB correctly Connect sensor to PCB correctly Is sensor value correct Replace sensor If value is 100 k2 1 open or 100 short error occurs NB Resistance value of temperature sensor change according to temperature Replace corresponding It is normal if value shown as below 4 596 error outdoor unit PCB Sensor of air temperature 10 C 20 7k2 25 10k9 50 3 40 Sensor of piping temperature 10 C 10 25 C 5k2 50 1 8k9 81 Measure resistance of outdoor air temperature Measure resistance of outdoor suction pipe sensor temperature sensor Measure resistance of outdoor HEX A Measure resistance of outdoor HEX B temperature sens
110. re connection 149 TNH NO E x F r2 Note If LED is blinking oppositely after connecting Hall Sensor connector U V W output terminal oppositely replace the motor If LED is not blinking oppositely replace fan PCB assembly 106 1 motor defect assemble condition abnormal Plus II Fan Starting Failure 791 792 793 794 Error Fan Motor initial starting failure 2 Fan motor connector misconnection Hall sensor U V W ouput 3 Fan PCB defect Error diagnosis and countermeasure flow chart Is fan motor assemble No condition normal Yes Are the resistance No Between each phase and insulation resistance of motor output terminal normal No Yes Is fan motor connection No condition normal Yes Is fan PCB assembly normal No Yes Recheck power and installation condition Measuring fan motor phase resistance Fan motor wire connection Measuring insulation resistance between fan terminal amp chassis Check ODU fan motor assemble condition and locking Reassemble or replace if abnormality found 1 Check resistance between each motor output terminal 19 0 Q 7 at 75 2 Check insulation resistance between ODU fan motor terminal U V W and pipe over 100MQ Replace fan motor if abnormality found 1 Check if color of motor output terminal U V W connector matched with PCB s 2 Check wire disconnection and wiring Reassemble or replace if abnormality fo
111. reen LED communication LED blinks periodically Check H R unit input power 220V 7 10 ms oo 9 p Check installation status of communication line and connected pipe outdoor unit HR unit outdoor unit Check H R unit Rotary switch and Dip Switch setting 12942 13ueuoduio5 Je211329 3 Replace HR unit PCB 49349 uonnjos NB If Indoor units transmission cables of HR unit and cables of power 220V has been changed each other transmission parts and indoor will be burnt suonounj 159 141 1 Defective transmission connection Central controller transmission failure 2 Defective CNU failure central controller 3 Incorrect IP address of central controller or CNU 4 Defective transmission network Error diagnosis and countermeasure method 1 Check transmission cables are connected correctly or not 2 If central controller is connected to total network check IP of CNU central controller 3 Replace CNU 1 Defective CNU 2 Center controller initialization failure Central controller receive Error CNU to Central controller on time 1 Defective CNU 242 TOR Data receiving error data receiving error 2 Central controller initialization error When data length from 1 Mismatching CNU is longer than data length 2 Defective CNU defined at protocol 3 transmission noise error Central controlle
112. refrigerant pipe Error happens because of 3 4 Over charged refrigerant Over increase of times successive 5 Indoor outdoor unit LEV defect discharge pressure of compressor off due to over 7 When blocked compressor increase of high pressure Outdoor unit is blocked during cooling by high pressure sensor Indoor unit filter is blocked during heating 8 SVC valve is clogged 9 PCB defect of outdoor unit 10 Indoor unit pipe temperature sensor defect Error diagnosis and countermeasure flow chart No Is service valve opened Open service valve Yes Are transmission cable pipe connection normal No Check and repair transmission cable pipe connection No Adjust refrigerant amount Yes Is the additional ref amount correct Start up process Yes Is fan normal Indoor fan during heating Outdoor fan during cooling No Replace related parts Refer to Error 105 108 Yes Is filter blocked Heating indoor Cooling outdoor heat exchanger No Clean indoor filter heating outdoor heat exchanger cooling Yes Is value of high pressure sensor same as Manifold value Is it high actually No Replace sensor of high pressure Yes Check indoor unit LEV No Check indoor unit PCB Check in outdoor installation condition Yes Next page 72 Yes is the resistance value of outdoor unit check sol valve normal No
113. rmal 72942 1291432913 Yes 1 Check if color of motor output terminal U V W connector Is motor wire connection No matched with PCB s condition normal 2 Check wire disconnection and wiring Reassemble or replace if abnormality found o Yes 5 1 Check fan PCB assembly IPM normal Q 3 Is Fan PCB assembly normal Replace Fan PCB assembly d x es Recheck power and o installation condition 5 5 2 Measuring fan motor phase Hall Sensor connection resistance VOSNE NO La xn 4 105 S21u043129 3 97 1 motor hall sensor defect 2 ODU fan motor hall sensor Plus II Fan Motor Hall Sensor Fan Motor Hall Sensor disconnection 781 782 783 784 Error short open 3 ODU Fan Motor Hall Sensor wrong insertion 4 Fan PCB assembly defect Error diagnosis and countermeasure flow chart Is fan motor assemble No Check ODU fan motor assemble condition and locking condition normal Reassemble or replace if abnormality found Yes No Recheck f an motor hall sensor connection Is wiring between fan motor Reassemble if abnormality found and PCB normal 15 Connector color N Check if connector color matched between fan motor Hall Sensor PCB matched Reassemble if abnormality found Yes O Is fan PCB assembly normal No Yes Replace Fan PCB assembly Recheck power and installation condition Fan motor wi
114. s II 211 212 213 214 Over current detection at the inverter compressor U V W IPM overheating 91seg Inverter compressor terminal disconnected or loose N2 Left Inverter PCB IPM PCB defect 21 Comp IPM fault of inverter Defective inverter compressor N1 Right Inverter element IPM defect compressor motor damage 21 Comp compressor Low input voltage at the outdoor Error diagnosis and countermeasure flow chart ms oo 9 o9 5 Are the resistance between each phase and insulation resistance of Inverter compressor normal refer electric component part No Replace inverter compressor Yes Is inverter PCB of inverter compressor normal refer electric component part No Replace inverter compressor PCB 12942 1291432913 Yes Is IPM normal No e refer electric component part Replace IPM et Yes Is capacitor normal Repl it E refer electric component part capacitor m A Yes Is IPM SUB PCB No 0 et Yes 5 Is compressor lead cable No connection normal Check repair the connection 2 refer electric component part Yes No Multi V Plus Multi V Sync Is it Multi V Space Does cooling fan No of heat sink rotate Replace radiation cooling fan normally Is magnetic switch Replace M
115. should be more than a few Check values at both terminal of capacitor Charged voltage of between terminals of capacitor between IPM P N terminal DC link terminals should be more than 450V At the moment of inverter compressor start When check resistance of 1st coil of magnet switch resistance should be 0 47 When power is not supplied When magnet switch is on voltage should be 220V When power is not supplied While pressing green button of magnet switch Voltage of each connectors should be 0 or Resistance should be 0 122 Warning power should not be supplied 47 Counter measure Replace capacitor when value is more or less than normal spec Check input voltage and replace capacitor In case resistance is or 0 Q gt Replace Magnet switch When voltage is not 220V magnet switch is melt down Replace magnet switch Replace magnet switch yed oo 9 2S Ix 12942 uonnjos suonounj 159 S291u04329 3 97 D Part Function INV 1 Power COMP start relay PCB drive circuit INV COMP part 2 220V Plus IT U terminal V terminal W terminal 12 PWM LED Input voltage should be 220V when power is supplied No power 2 Power at PCB Input resistance should be more than a few when power is not supplied 10 Transmi LEDs s
116. t switch While pressing green button of magnet switch Replace magnet connection Voltage of each connectors should be OV or switch check Resistance should be 0 12 In case power Warning power should not be supplied is not supplied 147 s3Iuo4129 3 97 D a Plus Check How to check Counter measure ee points EOCR Time Current Rotary switch setting should be correct Cut off over Rotary Current 30 40A Time 5sec loaded switch Setting current to protect constant compressor Outdoor MAIN PCB 2 AC 220V 19 DC12V Power connector Cooling fan 3 AC power w out circuit to 8 JIG transmission connector 18 7 segment display 13 Central control signal amp on board writing circuit 9 Pressure temperature sensor circuit 15 FAN transmission circuit 17 Outdoor option setting switch 14 compressor transmission circuit 16 Auto Addressing 11 1 D gt 0 D transmission circuit connector 12 O D lt O D transmission circuit 6 AC 220V power 5 AC voltage sensing circuit 7 Power Trans Out connector connector for T N input voltage check central control No power 2 Power terminal Input voltage should be 220V Check fuse 3 15A T N voltage at PCB when power is supplied gt If resistance is 0 1002 replace 2 Power terminal Input resistance should be more than PCB a few k when power is not supplied 7 Transformer Output voltage should be 14V 9V Check transformer and connection
117. tallation condition 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure Reassemble or manage 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 Check connection condition and wiring if power is abnormal 1 Check R S T N connection condition 2 Check wire disconnection and wiring 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 Reassemble if abnormality found Check inverter PCB assembly IPM normality Replace inverter PCB assembly 100 Measuring input voltage Compressor Wire Connection moe Hed 21529 e ms m o 90 S h oS 2 5 sy 42949 1291432913 Noise filter input upper part Noise filter output lower part 493y9 uonnjos Inverter PCB assembly Wiring power to inverter PCB on Noise filter suonounj 159 Inverter PCB assembly power Moise filter power connection connection 101 During operation compressor 1 CT sensor defect Phase Power frequency 2 Capacity over of AVR 741 742 743 744 Unbalanes is over 50Hz difference 3 Bridge R N or S N or T N phase diii db between R amp T phase is 5A for volta
118. te the number of IDU connected is displayed at 7 seg of the ODU main PCB The number of HRU connected is displayed at 7 seg of the ODU main PCB SW03M Dip switch SW02M lt SW01M gt Equal number of IDU No and displayed one in terms of wiring Check power and communication wiring Yes between ODU HRU IDU Completion of the IDU auto addressing Retry auto addressing after solving problem Auto pipe detection Confirm the IDU auto addressing setting Turn off No 1 of SWO2M of the HRU Check the proper setting of No 2 amp 3 of SWO2M of the HRU Model of HRU amp number of IDU Reset the power of HRU PCB Confirm the No 5 DIP S W of SW03M of the ODU PCB Outdoor temp is over 15 C ON Outdoor temp is below 15 OFF Hed 21529 oo 9 2 9 gt Buljooysajqnoiy 12942 1291432913 In case of changing SW03M S W of the ODU reset power of the ODU main PCB Y Wait for 3 minute 9 5 Press SWO1M of the ODU for 5 second 2 A The number of HRU connected is displayed at 7 seg of the ODU main and then 88 is displayed 2 Outdoor unit is operating in heating mode for 5 30 minutes After ODU stopped the number of IDU Display error on the ODU PCB HRU PCB detected is displayed at 7 seg of the ODU ODU PCB HR unit No Valve No main PCB for 30 seconds
119. und Check fan PCB assembly IPM normal Replace Fan PCB assembly Fan wire wiring yed e m m oo A h oS 2 5 gt 429u2 uonnjos uo suonounj 159 NOSNGS TINH NJ E E P 107 Plus II Main PCB EEPROM 1 No EEPROM 861 862 863 864 2 EEPROM wrong insertion Error diagnosis and countermeasure flow chart 5 EOM oe Reset after checking EEPROM assemble condition condition normal Yes Is EEPROM 24C16 Replace EEPROM with 24C16 Yes Recheck power and installation condition Same direction both socket hole and EEPROM hole Replace after power off 108 Error occurs when checking 1 EEPROM bad contact wrong Plus II Fan PCB EEPROM the EEPROM checksum as insertion 871 872 873 874 Error initializing after power is 2 EEPROM Version is different supplied 3 ODU fan PCB assembly damage Hed 91seg Error diagnosis and countermeasure flow chart 1 Check EEPROM insertion direction connection condition Is EEPROM insertion normal 2 Check EEPROM checksum Replace EEPROM if abnormality found Yes Replace fan PCB assembly ms oo 9 o9 o 2 9 gt Is Fan assembly normal Yes Recheck power and installation condition 72949 juseuoduio93 1291432913 Fan EEPROM insertion 493y9 uonnjos suonounj 159 I
120. unit PCB DIP switch Dip switch Setting 4 4 5 6 7 8 9 10 11 12 13 14 ON 6055858 1 Main unit rr i Standard Setting All Off Short Pipe length No 1 Target a pressure down target low pressure up Long pipe length No 2 ON Target high pressure Up target low pressure down ir Longest Pipe length No 1 No 2 ON Refrigerant Auto Charging No 1 No 2 7 ON Refrigerant checking No 1 No 2 No 7 No 14 ON HEN I COC e esmec 2 COC _ I Tee m pressure compensation ss pressure compensation o o 168 b Plus Outdoor unit Dip switch Setting 4 PCB DIP switch 4 5 6 7 8 9 10 11 12 13 14 e 2 Settings of slave outdoor unit 9po2 10413 yore JO 5 Je21129 3 3 Settings of corresponding outdoor unit E ue A UU A 5 8 2 o 169 b Plus Inverter compressor drive current When compressor is starting Driving current fluctuation of Inv compressor should be less than 2A Plus Coil resistance of compressor When power is not supplied Check resistance of INV constant compressor INV const speed comp resistance INV COMP gt 1 29 10 Plus 0 359 10 plus IT Constant speed COMP U V 1 969 V W 1 9192 U W
121. unit sensor error 01 02 06 8 CN_DISP Outdoor unit front panel reception defect and remote control does not work 12 CN_DRAIN 3 CN_FLOAT Indoor unit leakage CH03 and remote 6 CN REMO control does not work 5 sensor input voltage must be 220V power on Barrister ZNRO1N FUSE PCB check check connection Check connection PCB latter 001 green LED flick flick initially Error CH10 FAN LOCK when it does not operate after remote control operation DC 310V is recharged is LG MV sensor value normal check indoor unit front panel LED operation Wireless remote control and forced operation switch operation DRAIN display AC 220V CH04 display or DRAIN operation When remote control operate and when indoor unit operation intermittent CH03 occurrence automatic ON OFF 163 manage and check input voltage 220V replace and check relate parts readjust and check connection Replace and check IC DIODE Replace after checking communication PCB and indoor unit PCB power supply replace and check motor and connection Replace CAPACITOR replace and check connection and sensor part reception PCB and connection part reception PCB and connection part replace PCB Replace DRAIN pump and check connection status remote control indoor unit PCB check eliminate noise and check communication line connection status check remote control SETTING 10413 m
122. uto addressing and input the address of central control 40 1 Motor connector connection fault 2 Indoor PCB fault 3 Motor fault Indoor unit BLDC fan motor Indoor BLDC fan motor feedback failure signal is absent for 50 sec yed Error diagnosis and countermeasure flow chart Is connector connection proper Connect properly oo 9 o9 2S gt Is fan motor normal Replace indoor unit fan motor 72942 2 Replace indoor unit PCB o o S It is normal when check hall sensor of indoor fan motor as shown below 2 i each terminal with the tester o D 9 z S AE o Replace the indoor unit PCB and then make sure to do Auto addressing and input the address of central control Notice The connection of motor connector to PCB should be done under no power supplying to PCB 41 Indoor unit doesn t get signal Indoor unit from ODU for 3 minutes transmission error continuously Error diagnosis and countermeasure flow chart After ODU main PCB reset error code disappears 42 After Auto addressing error code disappears 1 Indoor 485 transmission PCB fault 2 After PCB replacing auto addressing was not done Replace indoor unit 485 transmission PCB Plus 21 Plu
123. utput Multi V SPACE COMP PCB 2 CN09 3 CN05 4 CNO1 COMP FAN3point sensor power supply START RELAY Communication 91seg 1 CN06 MAIN CO Communication 9po9 10413 yore 10 aping Bunoouso qnoJ 12 LEDO1 02 5 CN04 11 Functiortke MUI high pressure switch amp Power Relay 1291439913 6 Power supply O 5 5 2 2 it o gt CL c 1 o z 9 CNO2 8 CN 7 CN GATE1 2 9 DC LINK sensor m 10 CN14 x COMP output sensor D Situation Monitoring How to check Counter measure Location c PCB power does not 4 CNO1 input voltage must be 220V power on LINE FUSE 3 15A 3 turn on CH52 manage after checking input o input resistance is over k2 power off voltage 220V 7 replace PCB if the resistance is 0 100Q Communication does 1 06 yellow LED LED01 02K must flick check communication and FAN not work 2 09 and MAIN if the yellow LED is flick or OFF check CH52 connection and replace PCB COMP malfunction 10 CN14 constant COMP output U V W replace after checking PCB and COMP if the difference is over 2A 9 CN02 DC voltage within 470V 520V replace after checking CAPACITOR 8 CNIPM check connection status and PCB 7 GATE CH21 Replace and check motor and CH22 connection CH23 Deficiency error 3 CNO5 3 point power line noise filter latter
124. ve and another cause also can exist 10 1 4 Temperature vs pressure of ref Saturation temperature vs saturation pressure table for each refrigerant Absolute pressure Guage pressure 101 325 kPa kPa X 101 97 00 9 0 o R 407C Relative Relative pressure kPaG Temp C EN Saturated Sal tated Saturated Saturated Liquid Liquid Gas kPaG E 9po2 10413 104 aping 5 s ae 86 75 3247 5 35 26 Z 25 100 11 ERN 20 143 99 _ 20 17943 11392 450 2 29 116 54 215 194 87 15 23728 160241 290 48 25 4171 10 253 46 10 303 86 _ 21896 25 409 7 61 8 5 32048 5 378988 28443 350 68 45060 gm 0 396 66 of 46 50 35972 400 347 2 35 28 5 48278 5 549 4577 50 1771 77 272 110 57962 140 4645 536 60 63 125 Q2 15 687 99 45 797307 64 2 75 13 09 18 85 8 20 808 69 20 5944 785 80 164 229 22 942 59 25 108 55 917 87 100 22 17 2767 30 10905521 30 125472 1073 1150 26 91 3224 35 125346 35 143 07 124628 1300 3123 36 42 40 143225 40 16357 14747 1450 3123 36 42 45 1627 89 45 186 04 1649 67 1750 424 4718 5 50 184136 50 2109 14 1883 24 2000 147 78 5250 9 55 207375 55 237387 2140 3 225 5267 56 97 60 232616 60 266151 242298 _ 2550 58 09 6228 65 2599 83 65 297336 2733 60 2850 63 05 66 74 70 259607 70 _ 3310 77 3075 22
125. wer is not supplied replace PCB 6 Transmission Yellow LED should blink Check yellow LED blinks or not circuit to main When is OFF check transmission PCB with main PCB and replace Malfunction of 9 PWM signal Green LED should blink Replace PCB inverter cable Check IC port cou rires compressor of PWM drive 9X8 when power is i not supplied 1 2 Diode 1 0V 2 3 Diode 1 4V Red LED When red LED blinks Check error code displayed at Error displays about inverter compressor PCB main PCB 154 Inverter compressor PCB Error a Plus D heck 7 US How to check Counter measure o points E Inverter 1 MICOM circuit 10 Comm circuit zi fan PCB 9 On boarding 5 Input circuit of 34 lighting connector 4 DC rectifying circuit 2 8 ad is In Output connector 9 of reactor o9 2 sensor connector 0 0 es 7 PWM j drive circuit DC Link output voltage 56 6 SMPS power S circuit DC Link electrolytic E capacitor 5 0 2 3 Input voltage of 34 4 wires should be Check supply voltage noise Input circuit 3 38 1 220V Reactor 1 filter fuse Che f wavexectifvi ircui Replace inverter fan PCB o l o c et o 5 O x R Reactor1 0 6V m A No 10 Transmission Yellow LED should blink Check yellow LED blinks or not E
126. ycle Circuit amp Sensor 1 6 1 Multi V Plus Plus II 1 6 1 1 Main Outdoor Unit 5 6 HP Hu Pressure sensor Af TT Pressure switch omp Compressor LEV Linear Expansion Valve Check valve OS Oi Separator Accum Accumulator 5 HEX Subcooling Circuit gm Thermistor Heat Exchanger Solenoid valve X Service valve Strainer a Heat Exchanger Cm Hot Gas Bypass dE 0 m P Liquid 385 Pipe Pipe 13 00 9 0 o 49949 juauoduoy DD JOH 2913913 a 49349 uonnjos suonounj 159 Indoor HEX EEY i 1 6 1 2 Main Outdoor Unit Plus II 8HP 5 3 i i i J 1 Indoor Unit Indoor Unit gt n gt gt 4 High Temp High Pressure Gas Model High Temp High Pressure Liquid i 0c Fen m Low Temp Low Pressure Outdoor i 4 A Outdoor Unit HEX Temperature 4 Sensor i Sensor High Pressure Sensor j E Pipe M Outdoor EEV Discharge t em perature 4 Sensor 4i 2 a Sub codling Circuit Be Outlet Temperature Sensor Liquid Injection Liquid Pipe Temp Sub Cooler R Sub cooling Circuit sF D Inlet Temperature 1 i Sensor 9 Outdoor Unit gt Pressure Sensor E Te

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