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Room Conditioner SVC MANUAL(General)

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1. Some Models are different with temperature of indoor fan ON OFF E Heating Mode Operation Details The unit will operate according to the setting by the remote controller and the operation diagram is shown as following Indoor unit Option 36 C Heat Exchanger temperature Option 34 C Option 29 C Option 27 C Option 16 C Intake Air Temperature Setting Temperature 4 C Thermo OFF Setting Temperature 2 C Thermo ON COMP Outdoor fan tti Indoor fan Se m 4way valve e Compressor off interval A While the indoor Heat Exchanger temperature is higher than 27 C fan operates at low speed when it becomes lower than 26 C fan stops For eleminating latent heat loss fan operates at low speed for 10 seconds periodically Indoor unit Heat Exchanger temperature Option 33 C Option 27 C Option 20 C Compressor Quidoorfanf ON Setting fan Setting fan 4way Valve Copyright 2008 LG Electronics Inc All right reserved 16 Only for training and service purposes LGE Internal Use Only 5 2 Forced operation Part2 Functions 8 Controls e To operate the appliance by force in case when the remote control is lost the forced operation selection switch is on the main unit of the appliance and operate the appliance in the standard conditions e The operating condition is set according to the outdoor temp and intake air temperature as follows tti
2. 46 Suction Pi GE e Faulty PCB e Normal voltage 2 5Vdc at 25 C plugged H e Faulty sensor Open Short Refer to sensor resistance table Heat sink e Connector connection error Normal resistor 5KQ at 25 C Unplugged 65 sor e Faulty PCB e Normal voltage 2 5Vdc at 25 C plugged e Faulty sensor Open Short e Refer to sensor resistance table Estimate the Voltage of each sensor Check the Connector connection Is it normal gy Yes Estimate the resistance of each sensor Wb No Correct connection Is the resistance of the Sensor is 200kQ 10kQ No 5kQ at 25 C Change the sensor Jj Yes Plug the sensor on Indoor unit PCB Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Is the voltage of the sensor is 4 5Vdc 2 5Vde at 25 C y Yes Repair or Change the PCB Unplugged mm No Change the sensor Plugged Check the resistance Check the voltage 69 LGE Internal Use Only 5 Trouble Shooting 6 21 Check code Trouble shooting CH51 CH60 Ge Title Cause of error Check point amp Normal condition 51 Over capacit e Over capacity e Check the indoor unit capacity PS Combination e Check the combination table EEPROM F e Check the connection port 60 Check sum Cheek sumi error e Check the poor soldering Check Flow Chart CH51 Check the
3. Duration 240 sec Step control every 1 min response time On time control Duration continues Ch Catch up the stagnation Step control every 2 min response time Tdsh lt 20 C Option Tdsh gt 20 C Option Check Dis superheating temp Tdsh Dis superheating control Super heat control Tash Tsh Tout Tin Tash lt 20 C Tash gt 0 C Option Tsh lt 2 C Tsh gt 2 C Option Back to Close LEV Main Control Open LEV Close LEV 35 Copyright 2008 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Part3 Control logic ngaung Power ON Ch Power Reset LEV Initialization Fully close Duration 90 sec set 0 200 pulse can hear knocking sound 2 Fully Open Compressor ON Outdoor Fan ON y Standard Initial set Hp pulse open Starting control Duration 240 sec Step control every H 1 min response time On time control Duration continues Ch Catch up the stagnation Step control every 2 min response time Tdsh lt 15 C Option Tdsh gt 15 C Option Check Dis superheating temp Tdsh Dis superheating control Super
4. gt Main Board o 5times Q 2time Y OFF 53 Signal error Indoor gt Outdoor o 5times Y 3times Y OFF 60 EEPROM Check Sum Error o 6times O OFF 61 Cond Pipe High e 6times Y itime A OFF 62 Heatsink High o 6times Y 2times Y OFF 63 Cond Pipe Low e 6times Y 3times OFF 65 Heatsoml Th error Open Short o 6times Y 5times Q OFF 67 BLDC motor fan lock outdoor o 6times Y 7times Y OFF 73 PFC Fault Error S W 7times CN 3times Y OFF A CAUTION Precaution in Service or Check Even after stopping the operation of product it takes some time to discharge the remaining electricity of the electrolytic capacitor that was charged early Before conducting a checking or repairing job pull out the plug out of the outlet and make sure that the lamp on the control board outdoor unit is off Copyright 2008 LG Electronics Inc All right reserved 45 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Liquid side Outdoor unit e Procedure 1 Confirm that both the 2 way and 3 way valves are set to the open position Remove the valve stem caps and confirm that the valve stems are in the raised position Be sure to use a hexagonal wrench to operate the valve stems 2 Operate the unit for 10 to 15 minutes 3 Stop operation and wait for 3 minutes then connect the charge set to the service port of the 3 way valve Connect the charge hose with t
5. 25 4 66 35 136 64 4 418 15 15 87 4 57 40 113 98 4 318 20 12 55 4 47 45 95 62 4 208 25 10 4 35 50 80 65 4 088 30 8 03 4 21 55 68 38 3 958 35 6 49 4 06 60 58 27 3 82 40 5 28 3 89 65 49 88 3 674 45 4 33 3 71 70 42 9 3 522 50 3 57 3 52 75 37 05 3 365 55 2 96 3 32 80 32 14 3 205 60 2 47 3 11 85 27 99 3 043 65 2 07 2 9 90 24 46 2 88 70 1 74 2 69 95 21 46 2 719 75 1 48 2 48 100 18 89 2 561 80 1 26 2 28 110 14 79 2 255 85 1 07 2 09 120 11 72 1 972 90 0 92 1 9 130 9 4 1 716 95 0 8 1 73 140 7 62 1 487 100 0 69 1 57 150 6 24 1 287 76 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Check of compressor E Check resistance of the compressor E Check Insulation resistance of the compressor Comp MA Copper Comp pipe Jl EAS Ee Resistance Q at 20 C Resistance Q at 20 C U V Ww 1 Phase ASUW306DGMO 0 75 0 75 0 75 Terminal All models ASUW366DGMO 0 44 0 44 0 44 U GND More than 2MQ V GND More than 2MQ W GND More than 2MQ Copyright 2008 LG Electronics Inc All right reserved 77 Only for training and service purposes LGE Internal Use Only P NO MFL47149003 SEPTEMBER 2008
6. Check to see if the power cable plug is not dirty or loose If the plug is dust or loose it can cause an electrical shock or fire Do not use a joined power cable or extension cable or share the same power outlet with other electrical appliances otherwise it can cause an electrical shock excessive heat generation or fire Do not insert hands or other objects through the air inlet or outlet while the prod uct is operating There are sharp and moving parts that could cause personal injury Do not block the inlet or outlet of air flow It may cause product failure 00080 44CAUTION Check to see if the parts are mounted correctly and wires are connected Improper installation and connections can cause an electric shock or an injury Check the installation platform or frame has corroded Corroded installation plat form or frame can cause the unit to fall resulting in injury Be sure to check the earth wire is correctly connected After the work has finished be sure to do an insulation tset to check the resis tance is 2 Mohm or more between the charge section and the non charge metal section Earth position If the resistance value is low a disaster such as a leak or electric shock is caused at user s side Check the drainage of the indoor unit after the repair If drainage is faulty the water to enter the room and wet floor GG Ge Ge Copyright 2008 LG Electronics Inc All ri
7. Overcharging of refrigerant Pipe Length Condenser is blocked Refer to belows Change DC link capacitor y Yes Or Main PCB Remove obstruction Change outdoor fan or motor Change refrigerant Outdoor fan is locked Y No Change Main PCB Dc link voltage table Model DC Link Voltage Type Non operating Operating 1 Phase AUUW126C PSC DC300V 10 DC280V 10 AUUW186C PSC DC300V 10 DC280V 10 AUUW246D PFC DC300V 10 DC380V 10 AUUW306D PFC DC300V 10 DC380V 10 AUUW366D PFC DC300V 10 DC380V 10 AUUW426D PFC DC300V 10 DC380V 10 AUUW486D PFC DC300V 10 DC380V 10 AUUW606D PFC DC300V 10 DC380V 10 3 Phase AUUW368D PSC DC540V 10 DC500V 10 AUUW428D PFC DC540V 10 DC680V 10 AUUW488D PFC DC540V 10 DC680V 10 AUUW608D PFC DC540V 10 DC680V 10 60 LGE Internal Use Only 5 Trouble Shooting 6 12 Check code Trouble shooting CH22 Display c de Title Cause of error Check point amp Normal condition e Malfunction of compressor 22 Max C T e Over current e Blocking of pipe e Low voltage input e Refrigerant pipe length blocked Check Flow Chart Check the wire Is it normal connection U V W 1 Ph 230V 10 mp No 3 Ph 400V 10 Needs electric work Is it normal No A se Correct Check
8. Target frequency Hz N EE frequency Time sec Copyright 2008 LG Electronics Inc All right reserved 20 Only for training and service purposes LGE Internal Use Only Part3 Control logic 2 1 Frequency control Frequency that corresponds to each rooms capacity will be determined according to the difference in the temperature of each room and the temperature set by the remote controller There are various factors determining the frequency 1 Indoor unit capacity value 2 Temperature compensation factor 3 Initial frequency setting To amp fro feedback pa Ah E Lae eee an Indoor temperature Indoor capacity Basic formula of Indoor On OFF Outdoor calculation Selected fan speed Temperature Compressor setting Continues System Indoor Outdoor Calculation of Start check ON Setting data gt data set frequency l system Stop system 2 2 Primary step setting Capacity steps of compressor are decided by Qj Summation of capacity code TAO Outdoor temp TAI Indoor temp DTAI Step Compensation of temperature difference Indoor Temp and Setting Temp Comp Step Step base Long piping compensation x AStep TAO x AStep TAI x AStep DTAI Step base Standard frequency step by 3 OH Summation of capacity code Long piping Comp Step compensation by setting long piping AStep TAO step compensatio
9. control Compressor Control EEV control EEV Control FAN control FAN control Oil Return Control Oil Return Control Oil equalizing Oil equalizing Control Sump Heating Sump Heating Control Other Protection Control Protection Control Functions Inverter protection Inverter protection amp Controls Defrost Deicing Condenser frost prevention High pressure switch Detect high pressure for safety Optional Low pressure switch Detect low pressure for safety Optional Phase protection Misconnection prevention for three phase Optional Restart delay For overload prevention Optional 3 minutes Self diagnosis Error code displays Soft start Soft start for compressor Optional Test function Test operation Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Part2 Functions 8 Controls Some Models are different with swing width and swing pattern 2 1 Auto swing left amp right e By the horizontal airflow direction control key input the left right louver automatically operates with the auto swing or it is fixed to the desired direction Left LL 110 120 2 2 Auto swing up amp down e By the auto swing key input the upper lower vane automatically operates with the auto swing or it is fixed to the desired direction Close 110 120 Open 2 3 Chaos swing up down e By the Chaos swing key input the upper l
10. heat control Tash Tsh Tsuc Thpipe Tash lt 15 C Tash gt 15 C Option Tsh lt 1 C Tsn gt 1 C Option Back to Close LEV Main Control Open LEV Close LEV Copyright 2008 LG Electronics Inc All right reserved 36 Only for training and service purposes LGE Internal Use Only Part3 Control logic 9 Oil resto 1 When the accumulated compressor running time is over 3 hr option oil restoring operation is made for 3 minutes If it s on the way of compressor starting it s made after the starting 2 Accumulated running time is cleared after the defrosting and oil restoring operation Operating process 1 Fully open all the indoor s LEV 2 After the LEV opening change the compressor step to 70 Hz option 3 Reversing valve will be same as in defrosting process 4 Outdoor fan operates in low speed 5 During this operation if operating frequency should be changed by safety control then follow safety control first If compressor should be OFF by that stop operation 6 The LEV openings after this operation is 12096 of the opening at the point of starting A function protecting inverter compressor from damages by increasing oil viscosity in low outdoor temperature For the control compressor operates in low frequencies Operating condition in case of the following 3 conditions are fulfilled at the same time Outdoor temperature D pipe temperature Heat sink temperature below 0 C 5 C lt OD t
11. indoor unit combination Check the outdoor unit max combination Is it normal No Correct connection Jj Yes Check PCB Check Flow Chart CH60 Check the the connection port Is it normal S No Correct connection y Yes Change EEPROM Copyright 2008 LG Electronics Inc All right reserved 70 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 6 22 Check code Trouble shooting CH52 Display code Title Cause of error Check point amp Normal condition Transmission error Main controller of Master 1 Power cable or transmission cable is not between Inverter PCB gt unit of Master unit can t connected a AN PCB receive signal from 2 Defect of outdoor Main fuse Noise Filter inverter controller 3 Defect of outdoor Main inverter PCB E Error diagnosis and countermeasure flow chart Is noise filter or fuse normal Yes Replace inverter compressor PCB Re connect transmission cable Is transmission LED Yellow of inverter compressor PCB on Yes Replace noise filter or fuse Replace MAIN PCB Replace inverter compressor PCB Check Point Check the Transmission connector and LED Main 4 Inverter gt 42 48 60k lt Inverter PCB gt lt MAIN PCB gt Copyright 2008 LG Electronics Inc All right reserved 71 Only for training and service purposes PGE intemal Use Only 5 Trouble Shooting 6 23 Check code Trou
12. operate with partial load after example after finishing starting control for 1 indoor unit another indoor unit is ON additionally is operated with target opening of LEV 3 The indoor units which are in the middle of starting control are continuing starting control with the opening of its opening 4 Urgent control by indoor piping temperature 1 LEV open 4 pulse with every 10 sec when the indoor piping temperature is below 2 C 2 When the temperature reaches 4 C system return to the starting control pulse value Pull open Starting LEV E E opening i Target Pulse Target step Comp starting a Time sec Copyright 2008 LG Electronics Inc All right reserved 32 Only for training and service purposes LGE Internal Use Only 8 3 Steady state control e Cycle diagram _ oO D bei o x lt Lu bei o I A K LEV Linear Expansion Valve Part 3 Control logic Tair Heat Exchager T pipe e P h diagram Subcooling Discharge dE superheating Tc Cond Out e e Discharge Te Eva In D qe Suction Eva Out e Superheating Cooling mode Heating mode T out Evaporator outlet Condenser inlet Tin Evaporator inlet Condenser outlet T pipe Condenser out Evaporator inlet T suc Compressor suction Compressor suction T disp Compressor discharge Compressor discharge Copyright 2008 LG Electronics Inc All right reserve
13. there is risk of fire or electric shock due to dust water etc Indoor outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no force pulling the cable from the connection terminals Improper or loose connections can cause heat generation or fire Do not touch operate or repaire the product with wet hands Hoding the plug by hand when taking out Otherwise there is risk of electric shock or fire OO gt D A CAUTION Do not turn on the breaker under condition that front panel and cabinet are removed Be sure to earth the air conditioner with an earthing conductor connected to the earthing terminal Conduct repair works after checking that the refrigerating cycle section has cooled down sufficiently Otherwise working on the unit the hot refrigerating cycle section can cause burns Do not tilt the unit when removing panels Otherwise the water inside the unit can spill and wet floor Do not use the welder in a well ventilated place Using the welder in an enclosed room can cause oxygen deficiency Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred gt OO e Copyright 2008 LG Electronics Inc All right reserved 4 Only for training and service purposes LGE Internal Use Only Part 1 General Information 1 2 Inspections after Repair WARNING
14. top position Is it normal Jj Yes Is the float switch clean y Yes Check the wire connection Open Soldered poorly Is it normal Jj Yes Is the resistance of f loat switch normal short Copyright 2008 LG Electronics Inc All right reserved No Check Drain Pump mp No Clean float switch BB No Correct connection Or re soldering PCB mp No Change the float switch Only for training and service purposes 57 pt peaa OOOO AS L KA CN Float AA ma Re i Drain pump check Check the wire connection Open Soldered poorly Is it normal No Correct connection 4 Yes Or re soldering PCB Is the resistance of Drain Pump Normal gt No about 4000 Change the Drain Pump y Yes Is the drain pump clean y Yes Check drain tube installation No Clean drain pump LGE Internal Use Only 5 Trouble Shooting 6 9 Check code Trouble shooting CH09 CH10 Ge Title Cause of error Check point amp Normal condition 09 EEPROM e Check sum error e Check the poor soldering Check sum Indoor e Change PCB e Fan motor break down BLDC motor e Fan motor amp PCB poor Check the indoor fan motor 10 fan lock Indoor contact e Check the connection status between e Obstruction to the fan PCB and fan motor Check Flow Chart Check the indoor fan motor Fan is locked by obstruction Is it normal y Yes Check the connecti
15. training and service purposes EOE intemaltse Only Part3 Control logic 6 1 Function Working of outdoor fan are different in different models Some models are single fan some are two fan type 6 2 Operating process Control logic of outdoor fan depends on outdoor temperature 1 DC motor fan control Model REM Base Step Max Step Min Step ASUW306DGMO 670 700 200 1 Pahse ASUW366DGMO 950 1000 200 Outdoor Temperature Cooling Step Outdoor Temperature Heating Step 41 46 C Base Step 2 22 26 C Base Step 4 38 41 C Base Step 1 18 22 C Base Step 3 28 38 C Base Step 14 18 C Base Step 2 24 28 C Base Step 1 10 14 C Base Step 1 18 24 C Base Step 2 4 10 C Base Step 14 18 C Base Step 3 0 4 C Base Step 1 9 14 C Base Step 4 4 0 C Base Step 2 2 9C Base Step 5 8 4 C Base Step 2 3 2 C Base Step 6 15 8 C Base Step 2 Copyright 2008 LG Electronics Inc All right reserved 28 Only for training and service purposes LGE Internal Use Only Part3 Control logic Low ambient cooling In this situation outdoor fan works in ON OFF control If the pipe temperature is 0 10 C and it is falling rapidly in that case compressor will run for 5 min amp then it will go in low ambient control After the system is stopped by CT cut or heat sink cut off cycle will return to the normal operating control T pipe Cond Out T2 10 Option C T1 4 Option C Outdoor fan Sett
16. with respect to setting temperature air conditioner keeps the room tempera ture in 2 C with respect to setting temperature by auto change mode 44 C Switching point 2 C 0 5 C SET Temp 0 5 C Heating thermo off Cooling thermo off 2 C Switching point Cooling Heating operation Cooling operation operation Copyright 2008 LG Electronics Inc All right reserved 13 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls E Cooling heating Opeattions 5 1 1 Cooling Mode o Thermo 0 5 C ON Setting Temp Thermo OFF INV Comp Frequency High gt Low Comp OFF High lt Low Constant Comp Comp ON Comp OFF Comp ON e Operating frequency of compressor depends on the load condition like the difference between the room temp and the set temp frequency restrictions e f the compressor operates at some frequency the operating frequency of compressor cannot be changed within 30 seconds not emergency conditions e Compressor turned off when intake air temperature is in between 0 5 C of the setting temp limit for three minutes continuously intake air temperature reaches below 1 0 C of the temperature of setting temp e Compressors 3 minutes time delay After compressor off the compressor can restart minimum 3 minutes later Compressor operating range is form 40 to 110 of rated conditio
17. 00V 10 DC380V 10 AUUW426D PFC DC300V 10 DC380V 10 AUUW486D PFC AUUW606D PFC DC300V 10 DC300V 10 DC380V 10 DC380V 10 3 Phase AUUW368D PSC DC540V 10 DC500V 10 AUUW428D PFC AUUW488D PFC DC540V 10 DC540V 10 DC680V 10 DC680V 10 AUUW608D PFC DC540V 10 DC680V 10 64 LGE Internal Use Only 5 Trouble Shooting 6 16 Check code Trouble shooting CH29 SEN Title Cause of error Check point 4 Normal condition 1 Overload operation Pipe clogging Covering EEV defect Ref over charge Inverter compressor over Inverter compressor input 29 current Cuntis over 30A 2 Compressor damage Insulation damage Motor damage 3 Input voltage low 4 ODU inverter PCB assembly damage Check Flow Chart 1 Check Pipe clogging distortion 2 Check Covering Indoor Outdoor Unit Na Aa NA ING y 3 Check EEV connector assemble condition normal operation 4 Check refrigerant pressure Yes y gt Reassemble or manage if abnormality found 1 Check resistance between each terminal of compressor 0 188 7 N y 2 Check insulation resistance between compressor terminal and pipe over 50M gt Replace compressor if abnormality found Are the resistance Between each phase and insulation resistance of Inverter compressor normal Yes y Is compressor Wire connection condition normal 1
18. 3 55 4 481 20 107 09 4 492 15 39 5 4 322 15 79 4 336 10 29 48 4 131 10 58 95 4 149 5 22 24 3 91 5 44 47 3 931 0 16 95 3 661 0 33 9 3 685 5 13 05 3 389 5 26 09 3 416 10 10 14 3 102 10 20 27 3 131 15 7 94 2 808 15 15 89 2 838 20 6 28 2 515 20 12 55 2 546 25 5 2 232 25 10 2 262 30 4 01 1 965 30 8 03 1 994 35 3 24 1 717 35 6 49 1 745 40 2 64 1 493 40 5 28 1 519 45 2 16 1 293 45 4 32 1 316 50 1 78 1 116 50 3 56 1 137 55 1 48 0 962 55 2 95 0 981 60 1 23 0 828 60 2 46 0 846 65 1 03 0 714 65 2 06 0 729 70 0 87 0 615 70 1 74 0 628 75 0 74 0 531 75 1 47 0 542 80 0 63 0 459 80 1 25 0 469 85 0 54 0 397 85 1 07 0 406 90 0 46 0 345 90 0 92 0 353 95 0 4 0 3 95 0 79 0 307 100 0 34 0 262 100 0 68 0 268 75 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting Heatsink Temp D Pipe Temp B Constant 3970 B Constant 3500 Std Temp 25 Std Temp 25 Resistance 10 Resistance 200 Temp Resistance Volt Temp Resistance Volt 30 102 17 4 71 30 2845 99 4 969 25 73 49 4 61 0 585 66 4 851 20 53 55 4 48 5 465 17 4 814 15 39 5 4 32 10 372 49 4 77 10 29 48 4 13 15 300 58 4 717 5 22 24 3 91 20 244 33 4 657 0 16 95 3 66 25 200 4 587 5 26 05 4 73 30 164 79 4 508 10 20
19. 4 2 PUMP DOWN maa BANGKA toi as ANG NAA ALA 46 sA UE LA AA AA AA 47 GAS GAR a aaa a ce tonne has tae Bat aah DAG an aaa ala Naa enon NAGANO 48 Lo Os Pa scr rr ee ne 49 elle Tu EE 50 Copyright 2008 LG Electronics Inc All right reserved 1 Only for training and service purposes LGE Internal Use Only NM 1 General Information T Safety E e a AN AA TE DAAN NAGA NAAN NAA ANAN 3 Schleeken 6 Copyright 2008 LG Electronics Inc All right reserved 2 Only for training and service purposes LGE Internal Use Only Part 1 General Information To prevent injury to the user or other people and property damage the following instructions must be followed E Incorrect operation due to ignoring instruction will cause harm or damage The seriousness is classified by the follow ing indications AWARNING This symbol indicates the possibility of death or serious injury ACAUTION This symbol indicates the possibility of injury or damage to properties only E Meanings of symbols used in this manual are as shown below D Be sure not to do Q Be sure to follow the instruction AN Dangerous Voltage 1 1 Cautions in Repair AWARNING Be sure to disconnect the power cable plug from the plug socket before disas sembling the equipment for a repair Internal components and circuit boards are at main potential when the equipment is connected to the power cables This volt age is extremely dangerous and m
20. 47 Only for training and service purposes kab Inemakiae Only 5 Trouble Shooting Check valve Charging cylinder Outdoor unit e Procedure 1 Connect the charge hose to the charging cylinder Connect the charge hose which you dis con nected from the vacuum pump to the valve at the bottom of the cylinder If you are using a gas cylinder also use a scale and reverse the cylinder so that the sys tem can be charged with liquid 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air Be careful of the liquid refriger ant The procedure is the same if using a gas cylinder 3 Open the valve Lo side on the charge set and charge the system with liquid refrigerant If the system can not be charged with the spec ified amount of refrigerant it can be charged with a little at a time approximately 150g each time while operating the air conditioner in the cooling cycle however one time is not suffi cient wait approximately 1 minute and then repeat the procedure pumping down pin Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes This is different from previous procedures Because you are charging with liquid refrigerant from the gas side absolutely do not attempt to charge with larger amounts of liquid refrigerant whil
21. Check inverter PCB assembly U V W connector connection condition No 2 Check wire disconnection and wiring 3 Check compressor terminal connection condition bad contact gt Reassemble if abnormality found Yes y d No Check Is input voltage normal L N phase is 220V 15 gt Check connection condition and wiring if power is abnormal Yes 4 Is inverter PCB assembly No Check inverter PCB assembly IPM normality normal gt Replace inverter PCB assembly Yes il Recheck power and installation condition Copyright 2008 LG Electronics Inc All right reserved 65 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 6 17 Check code Trouble shooting CH39 pers Title Cause of error Check point amp Normal condition Transmission Error Communication Error 1 Micom defect Circuit defect 39 Between PFC Micom gt Between PFC Micom 2 Different Micom S W Version INV Micom and INV Micom 3 ODU inverter PCB assembly damage Check Flow Chart Is PFC Micom amp INV Micom No o lijpgrade Mica program S W Program normal Yes Is Inverter PCB assembly normal Yes No Recheck power and installation condition Copyright 2008 LG Electronics Inc All right reserved 66 Only for training and service purposes gt Replace inverter PCB assembly LGE Internal Use Only 6 18 Check code Trouble shooting CH40 5 Trouble Shooting Int
22. DC link 3 Yes connection capacitor Is it normal No l Refer to belows Change DC link Check the resistance of capacitor comp No difference at Jj ve Or Main PCB each terminal Check Over load condition E Remove obstruction Overcharging of Is it normal No eee vee fan ananga SE Change refrigerant y Yes Compressor Condenser is blocked Outdoor fan is locked Check the electricity leakageof the compressor Refer to comp check table Y No Change Main PCB Is it normal No De link voltage table Change Wo DC Link Voltage y Yes Compressor SE Type Non operating Operating 1 Phase AUUW126C PSC DC300V 10 DC280V 10 AUUW186C PSC DC300V 10 DC280V 10 Check the input power AUUW246D PFC DC300V 10 DC380V 10 Outdoor Indoor unit AUUW306D PFC DC300V 10 DC380V 10 AUUW366D PFC DC300V 10 DC380V 10 AUUW426D PFC DC300V 10 DC380V 10 AUUW486D PFC DC300V 10 DC380V 10 AUUW606D PFC DC300V 10 DC380V 10 3 Phase AUUW368D PSC DC540V 10 DC500V 10 AUUW428D PFC DC540V 10 DC680V 10 AUUW488D PFC DC540V 10 DC680V 10 AUUW608D PFC DC540V 10 DC680V 10 Copyright 2008 LG Electronics Inc All right reserved 61 LGE Internal Use Only Only for training and service purposes 5 Trouble Shooting 6 13 Check code Trouble shooting CH23 C
23. Di Sa Title Cause of error Check point amp Normal condition e Fan motor break down 67 BLDC motor e Fan motor A PCB poor e Check the indoor fan motor contact e Obstruction to the fan fan lock Outdoor e Check the connection status between e PCB and fan motor Check Flow Chart Check the indoor fan motor Fan is locked by obstruction Is it normal y Yes Check the connection status between PCB and fan motor No Remove obstruction Is it normal E No Correct connection Or re soldering PCB y Yes Check the DC Motor signal Is it normal y Yes Repair or Change the PCB E no Change Indoor Motor Copyright 2008 LG Electronics Inc All right reserved 73 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 6 25 Check code Trouble shooting CH73 Display cod Title Cause of error Check point amp Normal condition 1 Overload operation Pipe clogging Covering EEV defect Ref overcharge 2 Compressor damage Insulation damage Motor damage 3 Input voltage abnormal L N 4 Power line assemble condition abnormal 5 Inverter PCB assembly damage input current sensing part AC input instant over cur Inverter PCB input power 73 rent error current is over 48A peak Matter of software for 2ms Check Flow Chart 1 Check Pipe clogging distortion Is installation No 2 Check Covering Indoor Out
24. H28 Displa 3 una anag Title Cause of error Check point amp Normal condition e 1ph DC link volt is 23 DC Link 140Vdc 4 Check the power source Low voltage e 3ph DC link volt is Check the components 250Vdc 4 e 1ph DC link volt is DC Link 140Vdc e Check the power source 28 High voltage e 3ph DC link volt is e Check the components 250Vdc Check DC link voltage Check Flow Chart REACTOR 26 8mH 9A vum TED Check the wire lee E connection U V W tow Hab A SY O Is it normal mp No Check TRANS1 Correct connection Jj Yes Is it normal E No Change y Yes Compressor Dc link voltage table Is it normal DC Link Volt No Model In otage Change Type Non operating Operating Y Compressor 1 Phase AUUW126C PSC DC300V 10 DC280V 10 y Bs AUUW186C PSC DC300V 10 DC280V 10 AUUW246D PFC DC300V 10 DC380V 10 Check the input power AUUW306D PFC DC300V 10 DC380V 10 AUUW366D PFC DC300V 10 DC380V 10 AUUW426D PFC DC300V 10 DC380V 10 AUUW486D PFC DC300V 10 DC380V 10 AUUW606D PFC DC300V 10 DC380V 10 3 Phase AUUW368D PSC DC54OV 10 DC500V 10 AUUW428D PFC DC54OV 10 DC680V 10 AUUW488D PFC DC54OV 10 DC680V 10 AUUW608D PFC DC540V 10 DC680V 10 62 Copyright 2008 LG Electronics Inc Al
25. Input Current Control nuria ai 26 6 Dutdoor Fan COTTON nina aa aaa 28 7 Defrost Control cnica veuen dyads ana avana aradan aeaaaee auda oaa raaire aasan 30 A CONN narrar alada 31 CDe EE E 37 10 Compressor warm up control lOGIC ccocccnnnnnosnennoneensnnrcssercnnnnrnnanorcnnnrrnnnrrrnnnrnranes 37 11 Heat SINK controlan 38 Copyright 02008 LG Electronics Inc All right reserved 18 Only for training and service purposes LGE Internal Use Only Part3 Control logic Pi compressor 1 1 Basic principle Basic principle is to control the rpm of the motor by changing the working frequency of the compressor Three phase voltage is supplied to the motor and the time for which the voltage will supplied is controlled by IPM intelligent power module Switching speed of IPM defines the variable frequency input to the motor 120f RPM gt Revolutions Minute F gt Frequency P gt Number of poles BLDC Motor IPM Inverter Positive UVWXYZ lalalalala MCU 16Bits Copyright 2008 LG Electronics Inc All right reserved 19 Only for training and service purposes LGE Internal Use Only Part3 Control logic 1 2 Inverter compressor starting Target Step calculation method e Step A Step 1 Frequency Min frequency 20 25Hz e Step B Step A Target STEP 2 e Step C Step B Target STEP 2 e Step D Step C Target STEP 2 e Step E Step D Target STEP 2 lt lt
26. MARA anang L Option Je A E Low Temperature Over load working 3 18 23 28 Temperature C AStep DTAI Step Compensation of temperature difference between indoor temp and setting temp 40 110 Copyright 2008 LG Electronics Inc All right reserved 23 Only for training and service purposes LGE Internal Use Only Part3 Control logic 1 2 For the cooling and defrosting operation valve OFF for the heating operation valve ON At the starting outdoor is powered on indoor is not reversing valve continues OFF cooling 3 Method of changing mode from heating to defrosting As defrosting starts Inverter compressor Hz is lowered to 30Hz for 5 sec and the valve is OFF for the defrost mode refer working process of each component in defrosting and returning to heating mode 4 Method of changing mode from defrosting to heating As the defrosting is finished inverter compressor frequency is lowered to 30Hz for 10 sec And the valve is ON for the heating mode 5 If the operating mode is changed to heating from cooling 3 min restarting rule is applied and reversing valve position is changed within 30 sec after compressor turns OFF 6 If the compressor is stopped during heating mode by remote controller operation or error mode reversing valve position is changed to OFF in 30 sec after compressor turns OFF 7 If the compressor is stopped during heating mode by Thermistor signal reversing valve will r
27. Outdoor fan is locked y Yes Unplug the sensor on Outdoor unit PCB No Remove obstruction Change outdoor fan or motor Change refrigerant Check the Connector connection Is it normal Jj Yes Estimate the resistance of each sensor E No Correct connection Copyright 2008 LG Electronics Inc All right reserved 68 Only for training and service purposes Is the resistance of the sensor is 200kQ No at 25 C Change the sensor y Yes Plug the sensor on Indoor unit PCB Estimate the Voltage of each sensor y Yes Is the voltage of the sensor is No 4 5Vdc at 25 C Change the sensor y Yes Repair or Change the PCB LGE Internal Use Only 5 Trouble Shooting 6 20 Check code Trouble shooting CH41 CH44 CH45 CH46 CH47 CH65 Check Flow Chart Unplug the sensor on Indoor unit PCB peral Title Cause of error Check point amp Normal condition deg e Connector connection error Normal resistor 200KQ at 25 C Unplugged sat a GE e Faulty PCB e Normal voltage 4 5Vdc at 25 C plugged pip e Faulty sensor Open Short Refer to sensor resistance table e Connector connection error Normal resistor 10KQ at 25 C Unplugged 44 Air sensor e Faulty PCB e Normal voltage 2 5Vdc at 25 C plugged Faulty sensor Open Short Refer to sensor resistance table 45 e SORES Connector connection error Normal resistor 5KQ at 25 C Unplugged
28. ay cause death or severe injury if come in con tact with it Do not touch the discharging refrigerant gas during the repair work The discharging refrigerant gas The refrigerant gas can cause frostbite Release the refrigerant gas completely at a well ventilated place first Otherwise when the pipe is disconnected refrigerant gas or refrigerating machine oil discharges and it Can cause injury When the refrigerant gas leaks during work execute ventilation If the refrigerant gas touches to a fire poisonous gas generates A case of leakage of the refriger ant and the closed room full with gas is dangerous because a shortage of oxygen occurs Be sure to execute ventilation When removing the front panel or cabinet execute short circuit and discharge between high voltage capacitor terminals If discharge is not executed an electric shock is caused by high voltage resulted in a death or injury Do not turn the air conditioner ON or OFF by plugging or unplugging the power plug There is risk of fire or electrical shock OP e ec D 3 Copyright 2008 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Part1 General Information Do not use a defective or underrated circuit breaker Use the correctly rated breaker and fuse Otherwise there is a risk of fire or electric shock Install the panel and the cover of control box securely Otherwise
29. ble shooting CH61 CH62 HIPON Title Cause of error Check point 4 Normal condition Condenser e condenser pipe e Check the load condition 61 pipe sensor sensordetected high e Check the sensor of Condenser pipe sensor temp high temp 65 C e Normal resistor 5KQ at 25 C Unplugged e Normal voltage 2 5Vdc at 25 C Plugged states heat sink sensor e Check the load condition 62 temp high detected high temp e Check the sensor of heat sink 85 C e Normal resistor 10KQ at 25 C Unplugged e Normal voltage 2 5Vdc at 25 C Plugged Check Flow Chart Check Over load condition Refrigerant leakage Condenser is blocked Outdoor fan is locked y Yes Unplug the sensor on Outdoor unit PCB No Remove obstruction Change outdoor fan or motor Change refrigerant Check the Connector connection Is it normal y Yes Estimate the resistance of each sensor m no Correct connection Copyright 2008 LG Electronics Inc All right reserved 72 Only for training and service purposes Is the resistance of the Sensor is 5kQ No 10kQ at 25 C Change the sensor Jj Yes Plug the sensor on Indoor unit PCB Estimate the Voltage of each sensor Jj Yes Is the voltage of the sensor is 4 5Vdc mp No 2 5Vdc at 25 C Change the sensor y Yes Repair or Change the PCB LGE Internal Use Only 6 24 Check code Trouble shooting CH67 5 Trouble Shooting
30. bration bushing Tubing connection Evaluation of the performance Operate unit for 15 20 minutes then check the system refrigerant charge 1 Measure the pressure of the gas side service valve 2 Measure the temperature of the intake and discharge air 3 Ensure the difference between the intake temperature and the discharge is more than 8 C 46 F Cooling or Heating We Ce temperature 4 For reference the gas side pressure of optimum condition is as below Cooling Outside ambient The pressure of the gas side Refrigerant TEMP service valve R22 35 C 95 F 4 5kg cm G 56 8 71 0 P S I G R410A 35 C 95 F 8 5 9 5kg cm2G 120 135 P S I G Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes NOTE If the actual pressure is higher than shown the system is most likely over charged and charge should be removed If the actual pressure are lower than shown the system is most likely undercharged and charge should be added The air conditioner is now ready for use 5 Check operating current 6 Change operation mode and check 42 LGE Internal Use Only 5 Trouble Shooting P 5 Trouble Shooting Ts Self dlagno318 FUN NON naa apan mka 44 2 Pump DOW eiciiicissicstecscnsivctevssrsaccsivnatebestnstverassinsbiesieasseesescseuensincdhestvesbesnestestsbaseonceessnsstins 46 Sa Bakal AA NANANA NATAN 47 4 Ga
31. ck the component of IPM detection parts PSC Fault e Over current at e Check the component of IGBT PFC module PFC Fault IGBT PFC module e Check the components Check Flow Chart Check the wire connection U V W Is it normal No Correct nnection TI Yes connectio Check the resistance of comp No difference at each terminal Is it normal E No Change y Yes Compressor Check the electricity leakageof the compressor Refer to comp check table Is it normal E No Change y Yes Compressor Check the input power Outdoor Indoor unit Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Is it normal 1 Ph 230V 10 3 Ph 400V 10 y Yes Check DC link capacitor Is it normal Refer to belows y Yes Check Over load condition Overcharging of refrigerant Pipe Length Condenser is blocked Outdoor fan is locked Y no Change Main PCB Dc link voltage table No Needs electric work No Change DC link capacitor Or Main PCB Remove obstruction Change outdoor fan or motor Change refrigerant 1 Phase Model DC Link Voltage Type AUUW126C PSC Non operating DC300V 10 Operating DC280V 10 AUUW186C PSC DC300V 10 DC280V 10 AUUW246D PFC DC300V 10 DC380V 10 AUUW306D PFC DC300V 10 DC380V 10 AUUW366D PFC DC3
32. d 33 Only for training and service purposes LGE Internal Use Only Part3 Control logic e Cooling Mode 1 Superheating control Main control Superheating T superheating Tout Tin 2 C Option LEV pulse up T superheating gt 2 C LEV pulse down T superheating lt 2 C 2 Discharge Superheating Control Reliability control Dis Superheating T dis superheating T dis T pipe gt 20 C Option LEV pulse down T dis superheating lt 20 Option C T dis superheating 5 24 Option C Back to main control e Heating Mode 1 Superheating control Main control Superheating T superheating Tsuc Tpipe 1 C Option LEV pulse up T superheating gt 1 C LEV pulse down T superheating lt 1 C 2 Discharge Superheating Control Reliability control Dis_Superheating T dis_superheating T dis Tin Tout 2 gt 15 C Option LEV pulse down T dis superheating lt 15 C T dis_superheating gt 20 C gt Back to main control Copyright 2008 LG Electronics Inc All right reserved 34 Only for training and service purposes LGE Internal Use Only Part3 Control logic 8 4 Flow Chart f Cooling Power ON Ch Power Reset LEV Initialization Fully close Duration 90 sec set 0 200 pulse can hear knocking sound H Fully Open Compressor ON Outdoor Fan ON Standard Initial set pulse open Starting control
33. d of Indoor temp Operating Mode Setting temp e te dan j over 24 C Cooling 22 C 21 24 C Healthy Dehumidification 22 C High speed below 21 C Heating 22 C e The unit select the last operation mode in 3 hours e Operating procedures when the remote control can t be used is as follows The operation will be started if the ON OFF button is pressed If you want to stop operation re press the button 5 3 Sleep Timer Operation e When the sleep time is reached after lt 1 2 3 4 5 6 7 0 cancel hrs is input by the remote control while in appliance operation the operation of the appliance stops e While the appliance is on pause the sleep timer mode cannot be input e While in cooling mode operation 30 min later since the start of the sleep timer the setting temperature increases by 1 C After another 30 min elapse it increases by 1 C again When the sleep timer mode is input while in cooling cycle mode the airflow speed of the indoor fan is set to the low When the sleep timer mode is input while in heating cycle mode the airflow speed of the indoor fan is set to the medi um Copyright 2008 LG Electronics Inc All right reserved 17 Only for training and service purposes LGE Internal Use Only Part3 Control logic P 3 Control logic Be el kaa AA NAA ANAN eta eect eee AA AA 19 KE HERE ur de EE EA 3 Reversing valve operaton EE 24 4 Discharge pipe pcon rol aT aaa ANAN AA EE ee 25 5
34. door Unit ES 3 3 Check EEV connector assemble condition normal operation condition normal 5 4 Check refrigerant pressure y gt Reassemble or manage if abnormality found es No Check Is input voltage normal gt L N phase voltage is 220V 10 gt Check connection condition and wiring if power is abnormal Yes No 1 Check L N connection condition Is AC input Wire connection pp 2 Check wire disconnection and wiring condition normal gt Reassemble if abnormality found Yes No 1 Check inverter PCB assembly U V W connector connection condition Is compressor e 2 Check wire disconnection and wiring Wire connection gt g a Ko Ha 3 Check compressor terminal connection condition bad contact condition normal gt Reassemble if abnormality found Yes No Is inverter PCB SE Check inverter PCB assembly IPM normality normal gt Replace inverter PCB assembly Yes Recheck power and installation condition Copyright 2008 LG Electronics Inc All right reserved 74 Only for training and service purposes LGE Intemal Use Only Sensor resistance table 5 Trouble Shooting Pipe Temp Air Temp B Constant 3977 B Constant 3977 Std Temp 25 Std Temp 25 Resistance 5 Resistance 10 Temp Resistance Volt Temp Resistance Volt 30 102 17 4 714 30 204 35 4 72 25 73 49 4 611 25 146 97 4 62 20 5
35. e operating the air conditioner 4 Immediately disconnect the charge hose from the 3 way valve s service port Stopping partway will allow the gas to be dis charged If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose 5 Mount the valve stem nuts and the service port nut Use torque wrench to tighten the service port nut to a torque of 1 8 kg m Be sure to check for gas leakage 48 LGE Internal Use Only 5 Trouble Shooting Trouble analysis 1 Check temperature difference between intake and discharge air and check for the operating current too Case Symptom Supposed Caused Case 1 Temp difference approx 0 C All amount of refrigerant leaked out Current less than 8096 of rated current Check refrigeration cycle Temp difference approx 8 C Refrigerant leakage Clog of refrigeration cycle Case 2 S Current less than 8096 of rated current Defective Compressor Case 3 Temp difference less than 8 C Excessive amount of refrigerant Current over the rated current Case 4 Temp difference over 8 C Normal Temperature difference between intake and discharge air depends on room air humidity When the room air humidity is rela tivery higher temperature difference is smaller When the room air humidity is relatively lower temperature difference is larger 2 Check tempera
36. eeping sound is made from the indoor unit Primarily the operating condition of Micom is O K Check Remote controller amp Receiver Check Connector of Indoor PCB Check the voltage of power supply and check for the following The voltage of main power supply The voltage applied to the unit The connecting method of Indoor Outdoor connecting cable each color The P C B Assembly Fuse Noise Filter Power Module Bridge Diode etc The operation check of the Indoor P C B Ass y Procedure Specification Remedy 1 The input voltage of power mod 1 AC230V 30V 1 Check the power outlet ule Check the rated voltage 2 The output voltage of power mod 2 12V 3V 2 Replace ule P C B Ass y Copyright 2008 LG Electronics Inc All right reserved 50 Only for training and service purposes LGE Intemal Use Only 5 Trouble Shooting 6 2 The Product doesn t operate with the remote controller Turn on the main power A Beeping sound is made from the indoor unit Refer to 10 1 Yes Check the voltage of power Is it possible to turn on the unit by ON OFF button on display Yes Is the remote controller When the mark 4 is displayed working properly in LCD screen replace battery Yes Check the contact point of CN DISP 1 2 connector amp Re connector Check display P C B Assembly Voltage between CN DISP1 6 should be DC 5V If pr
37. emain in heating position Copyright 2008 LG Electronics Inc All right reserved 24 Only for training and service purposes LGE Intemal Use Only Part3 Control logic 1 There can be two situations a Sensor is failed error code for sensor failure will be generated b Abnormal high temperature discharge temperature error code for high discharge will be generated Both cases unit will stop Compressor working 1 If discharge pipe temperature 2 T1 No limitation on compressor frequency 2 T2 lt discharge pipe temperature Toff Hysteresis control Compressor frequency down by 5 pulse amp Expansion valve up by 10 pulse in every 1 min If LEV is in the starting control it will follow starting control first 3 discharge pipe temperature gt Toff then compressor will be OFF System will stop if this situation occurs 5 times in 1 hour and error code will be generated also self diagnosis will start Discharge pipe temp Toff 105 Option C T2 95 Option C T1 90 Option C 5Hz Option Stop control Expansion valve Option up Option up Copyright 2008 LG Electronics Inc All right reserved 25 Only for training and service purposes LGE Internal Use Only Part3 Control logic 5 1 Function Controlling total current to protect power semiconductor devices from burn out by the low current including connecting mistake and over current Operating process 1 Detection check the
38. emp lt 0 C 10 C lt OD temp lt 5 C OD temp lt 10 C pex para pa Pad P4 starting starting starting t YA y P Y oe starting Y Y Y Opening target 0 7 Opening target 0 7 180 sec Time option Time option Time option Copyright 2008 LG Electronics Inc All right reserved 37 Only for training and service purposes LGE Internal Use Only Part3 Control logic 11 1 Function Power module failure protection by checking the temperature of heat sink There is a temperature sensor for checking the heat sink temperature 11 2 Heat sink sensor failure error Short Check if temperature 2130 C Open Check if temperature lt 30 C System will go in self diagnosis error 65 is displayed and product stops 11 3 Heat sink temperature control a Heat sink temperature lt T2 No limitation on compressor frequency b T2 lt heat sink temperature lt Toff Compressor frequency down by 5 Hz c Heat sink temperature gt Toff Compressor will be off System will stop if this situation occurs 5 times in 1 hour and error code will be generated also self diagnosis will start If high temperature situation occurs 5 times in 1 hr system counts 1 error and after that 4 times if this situation occurs system stops and give error code If the temperature reached Toff condition system will count 5 times after that and system will stop with error code Toff 85 Option C T2 75 Opt
39. ent and increases the usage life of air conditioner e Refer to trouble shooting guide 4 3 Soft dry operation When the dehumidification operation input by the remote control is received the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature Intake air Temp Setting Temp 26 C lt intake air temp 25 C 24 C lt intake air temp lt 26 C intake air temp 1 C 22 C lt intake air temp lt 24 C intake air temp 0 5 C 18 C lt intake air temp lt 22 C intake air temp intake air temp lt 18 C 18 C e While compressor off the indoor fan repeats low airflow speed and stop e While the intake air temp is between compressor on temp and compressor off temp 10 min dehumidification opera tion and 4 min compressor off repeat Compressor ON Temp gt Setting Temp 0 5 C Compressor OFF Temp gt Setting Temp 0 5 C e The indoor fan speed is automatically set to the low so the shift of the indoor fan speed is impossible because of already being set to the best speed for Dry Operation by Micom Control Copyright 2008 LG Electronics Inc All right reserved 212 Only for training and service purposes LGE Intemal Use Only Part 2 Functions amp Controls 5 1 Auto changeover operation The air conditioner changes the operation mode automatically to keep indoor temperature e When room temperature vary over 2 C
40. ernal circuit PN Title Cause of error Check point amp Normal condition H e Malfunction of t detection circuit 40 C T lee Ee alfunction of current detection circuit Open Short e The voltage of CO1N Is 4 0Vdc 25A 1 Check Flow Chart Check the input power AC230V Outdoor Indoor unit y Is it normal 230V 10 mp No Correct connection y Yes Check CO1N Is it normal 4 0Vdc 4 mp No Change Main PCB Y ves GUY i Change TRANS Jj Yes Change main PCB Copyright 2008 LG Electronics Inc All right reserved 67 Only for training and service purposes Current Trans LGE Internal Use Only 5 Trouble Shooting 6 19 Check code Trouble shooting CH32 CH33 pea Title Cause of error Check point amp Normal condition e Check the discharge pipe sensor for INV D pipe Inverter e Discharge sensor e Check the install condition for over load 32 temp high Inverter temp high e Check the leakage of refrigerant 105 C Check the SVC V V open e Refer to sensor resistance table e Check the discharge pipe sensor for Cons pa D pipe Constant Discharge sensor e Check the install condition for over load temp high e Check the leakage of refri t e Cons temp high g gerant 105 C1 PER e Check the SVC V V open e Refer to sensor resistance table Check Flow Chart Check Over load condition Refrigerant leakage Condenser is blocked
41. ged e Faulty sensor Open Short Refer to sensor resistance table e Connector connection error Normal resistor 5KQ at 25 C Unplugged 02 Indoor inlet pipe sensor Faulty PCB Normal voltage 2 5Vdc at 25 C Plugged e Faulty sensor Open Short Refer to sensor resistance table e Connector connection error Normal resistor 5KQ at 25 C Unplugged 06 Indoor outlet pipe sensor Faulty PCB Normal voltage 2 5Vdc at 25 C Plugged e Faulty sensor Open Short Refer to sensor resistance table Check Flow Chart Unplug the sensor on Indoor unit PCB Check the Connector connection m No Correct connection Is it normal y Yes Estimate the resistance of each sensor Is the resistance of the sensor 102 m no 5kQ at 25 C Correct connection y Yes Plug the sensor on Indoor unit PCB Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 55 Estimate the Voltage of each sensor Is the voltage of the sensor 2 5Vdc my No at 25 C Correct connection y Yes Repair or Change the PCB Unplugged Plugged Check the resistance Check the voltage LGE Internal Use Only 5 Trouble Shooting 6 7 Check code Trouble shooting CH03 Ge Title Cause of error Check point amp Normal condition e Connector connection e error i i Communication Error e Connection of wire i Wired
42. ght reserved 5 Only for training and service purposes LGE Internal Use Only Part1 General Information 2 1 Global Model Name A S W 1 2 6 4 G G 1 1 2 3 4 5 6 7 38 9 t0 Code Type Code of Model Meaning 1 Production Center A Z L Chang won R22 Refrigerant A Chang won R410A 2 Product Type A Z S Split Type Air Conditioner 3 Cooling Heating Inverter A Z C Cooling Only H Heat Pump X C O E Heater Z H P E Heater V AC Inverter C O N AC Inverter H P Q DC Inverter C O W DC Inverter H P 4 5 Capacity 0 9 Cooling Heating Capacity Ex 09 9 000 Btu h 6 Electric Range 1 9 1 115V 60Hz A Z 2 220V 60Hz 3 208 230V 60Hz 5 200 220V 50Hz 6 220 240V 50Hz 7 110V 50 60Hz 7 Chassis A Z Name of Chassis 8 Look A Z Look Color Artcool Model 9 10 Function A Z A Basic B Basic 4Way C Plasma Filter D Plasma Filter 4 Way E Tele LCD F Tele LCD Nano plasma 4Way G NBF F A changeove A clean Low A H NBF F A changeove A clean 4way Low A I Tele LED 4way J Internet K Plasma F 4Way Oxygen generator L NBF F A changeove A clean M NBF F A changeove A clean 4way N NBF F A changeove A clean PTC P NBF F A changeove Autoclean 4way PTC Q NBF F A changeove A clean 4way Low A PTC R Negative ion A Clean S Nano Plasma Negative ion A Clean T 4way Nano Plasma F Negative ion A Clean U Nano Plasma F 4Way A cha
43. he push pin to the service port 4 Air purging of the charge hose Open the low pressure valve on the charge set slightly to air purge from the charge hose 5 Set the 2 way valve to the closed position Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 6 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg cm g 7 Immediately set the 3 way valve to the closed position Do this quickly so that the gauge ends up indi cating 3 to 5kg cm g 8 Disconnect the charge set and mount the 2 way and 3 way valve s stem nuts and the ser vice port nut Use torque wrench to tighten the service port nut to a torque of 1 8 kg m Be sure to check for gas leakage 46 LGE Internal Use Only 5 Trouble Shooting Outdoor unit e Procedure 1 Connect the vacuum pump to the center hose 3 Close the valve Lo side on the charge set of charge set center hose turn off the vacuum pump and confirm that the gauge needle does not move approxima 2 Evacuation for approximately one hour tely 5 minutes after turning off the vacuum Confirm that the gauge needle has moved pump toward 0 8Torr 4 Disconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil becomes dirty or depleted replenish as needed Copyright 2008 LG Electronics Inc All right reserved
44. http biz Igservice com Room Conditioner MODEL ASNW306DGM0 ASUW306DGMO ASNW366DGMO ASUW366DGMO CAUTION Before Servicing the unit read the safety precautions in General SVC manual Only for authorized service personnel Air Conditioner Service Manual CONTENTS Part 1 General Information 923 NG aos 2 BEE An EE 3 2 Nomenc EE 6 Part 2 Functions amp CONOS eent ege dE ds 7 1 List of Functions 8 Controls Lama AG NGANGA 8 PAN EEN 9 Ee leet e EE 11 UE 12 5 Convenience Functions 8 Controls Uu 1 a anna nnwnn wanna wwanaawnna aro rancn nr rara 13 Le La ME paaa roto AG 18 Te GOMPIeSS OM hiinat oil GANA 19 2 step trequency COntrol cs coi a enn ie ee 21 3 Reversing valve operaton cceccccesccecesceeeeeeeeeeeeeeeeeeeeeeeeneaeeeseaaeeseecenesseesseaeeeenaes 24 4 Discharge pipe control aaa GINANG anid iain 25 5 Input Current EE ciclones bs 26 6 Outdoor Fan CONO o IS 28 Ts DEMOS TT EE 30 8 LEV COMMON EE EE 31 9 Oil restoration operation GANAN is 37 10 Compressor warm up control Jogie cece cee eee e teeter tees tenet tee eeeeteeeteaees 37 tee leese 38 Pan Test RUM maa A A AA 39 1 Check before Test RUN si ciiscacetactiistinertevewausnductumanvavais ege 40 2 TOS RUN FIOW Cha Eonia 41 S POSE ROM DM NANANA LATA AN ADA Aah 42 Part 5 Trouble Shooting Guide neeeeseeseeseererrnsrrerttrrstnsrtntrrstnsstntrstnnstnsnn ttnn nnsnn nennen 43 T SOlALAQGNOSIS FUNCI N i e eissartar duren KG 4
45. i i 3 Hot i 8 SZ start Indoor Fan E bo Pd gt ON OFF Outdoor Fan Copyright 2008 LG Electronics Inc All right reserved 30 Only for training and service purposes LGE Internal Use Only Part3 Control logic 8 1 Control of LEV opening 1 LEV openings have a controllable ranges 70 option to 460 option pulse in both condition of cooling and heating 2 Products do not be operated before initializing of LEV when starting 3 Time constant control period of LEV is every 2 minutes except below conditions Control LEV every 1 minutes for 10 minutes after starting When indoor capacity changed Control LEV every 1 minutes for 10 minutes after starting Control LEV every 1 minutes for 10 minutes after starting in case of the special situation such as defrost completion oil recovery oil equalizing control oil supplying current transformer limitation limitation of discharge temperature low ambient operation control LEV opening f Pulse Power input Reset n aa Initializin Starting Time constant control control Starting control Heating and cooling Heating Cooling Copyright 2008 LG Electronics Inc All right reserved 31 Only for training and service purposes LGE Internal Use Only Part3 Control logic 8 2 Starting control 210 sec 1 Only 1 LEV will be operate as below and others are closed fully 2 Starting control does not use the time when the system
46. ing value Off Setting value Copyright 2008 LG Electronics Inc All right reserved 29 Only for training and service purposes LGE Internal Use Only Part3 Control logic 7 Defrost Control 7 1 Function These are about the control of compressor fan of outdoor unit reversing valve LEV 7 2 Starting to the defrosting operation A Defrost operation will be start when all the conditions below are matched simultaneously Accumulation time of operation and the period after completion of defrost 35min Outdoor air temperature 3 C B Outdoor piping temperature is below than 6 Option C for starting defrosting operation 7 3 Completion of defrost operation Send signal of defrost completion in case of meeting one of the condition as below 1 Defrosting time 7 minutes 2 Piping temperature maintain 10 seconds Option in condition of more than 15 C Option 7 4 Defrosting Control Algorithm Satisfy Satisfy HA Defrost Defrost eating Start aa End Start Condition S Condition Defrost flag clear 10 Baseline 80 Hz Option Control Inverter Comp 350 Pulse Option nanaaaana N Control HSN TTT Outdoor LEV A PAPA APA H s gt i D gt 15 5 WG KE 5 pg 5 P A 3 d COU UE EEOC gggannng Defrost signal of o i E indoor unit on i Indoor defrpst signal OFF ON Statting maximum defrosting S i i ON 8 Qi mie count TEN ni Reversing Valve bo
47. ining and service purposes LGE Intemal Use Only 5 Trouble Shooting 1 3 Error Indicator Outdoor Outdoor Error Ex Error 21 DC Peack 2 Times 2 Times 2 Times LED01G 5 i RED ig pi ji iq i iq 1 Seo io 1Sec i 1Sec 1 Time E 1 Time E l f 1 Time d LED02G GREEN V 2 Sec Outdoor Error Error Code Description INV TPS Ge E dee 21 DC Peak IPM Fault o 2times Y itime Y OFF 22 CT 2 Max CT o 2times Q 2times Y OFF 23 DC Link Low Volt e 2times Q9 3times Y OFF 24 L P Heater Sink o 2times Y 4times Y OFF 25 Low voltage Over voltage o 2times Y 5times Y OFF 26 DC Comp Position Error o 2times Y 6times Q OFF 27 PFC PSC Fault Error o 2times Y 7times OFF 28 DC Link High Volt o 2times A 8times A OFF 29 COMP Over Current 2times Y 9times Y OFF 32 D Pipe High INV o 3times Y 2times Y OFF 33 D Pipe High Normal o 3times 3times Y OFF 39 Communication Error 3times Y 9times A OFF 40 CT Sensor Open Short o 4times Y O OFF 41 INV D PipeTh Error Open Short o 4times A itime A OFF 44 Outdoor air Th Error Open Short o 4times 4times Y OFF 45 Cond Pipe Th Error Open Short o 4times 5times Y OFF 46 Suction Pipe Error Open Short o 4times Y 6times Y OFF 47 Const D pipe Th Error Open Short o 4times Y 7times Y OFF 51 Capacity over o 5times O 1time ON OFF 52 Signal Error DSP Board lt
48. ion C T1 70 Option C Set Set Set Copyright 2008 LG Electronics Inc All right reserved 38 Only for training and service purposes LGE Internal Use Only 4 Test Run Ol 4 Test Run Te Check before Test RUN Gees AEN eet NANANA ANAN 40 2 Test RuniFlow char baa a AAAH AID ND a BN testes 41 J TESTE RUM DOT AI soi carr ANAN ATA E aaa 42 Copyright 2008 LG Electronics Inc All right reserved 39 Only for training and service purposes LGE Internal Use Only 4 Test Run 1 Check to see whether there is any refrigerant leakage and check whether the power or transmission cable is connected properly Check liquid pipe and gas pipe valves are fully opened 2 NOTE Be sure to tighten caps Confirm that 500 V megger shows 2 0 MQ or more between power supply terminal block and ground Do not operate in the case of 2 0 MQ or less NOTE Never carry out mega ohm check over terminal control board 3 Otherwise the control board may break Immediately after mounting the unit or after leaving it turned off for an extended length of time the resistance of the insulation between the power supply terminal board and the ground maydecrease to approx 2 0 MQ as a result of refrigerant accumulation in the internal compressor If the insulation resistance is less than 2 0 MQ turn on the main power supply Copyright 2008 LG Electronics Inc All right reserved 40 Only for training and service purposes LGE I
49. irection control Optional Airflow Chaos swing up amp down Vertical Airflow Direction control Optional Airflow steps fan cool heat Indoor Fan speed Control Chaos wind auto wind Indoor Fan speed Control by chaos pattern Optional Jet cool Power wind Powerful cooling mode Deodorizing filter Air filtration using Deodorizing filter Air purifying Plasma air purifier Air filtration using plasma filter Optional Pre filter Air filtration using pre filter washable anti fungus Hot start To prevent cold wind blow on heating mode start Reliability Self diagnosis Error code displays Soft dry operation Dehumidification Auto changeover Cooling mode is automatically changed to heating mode and Optional vice verse Auto clean After cooling operation this function makes the A evaporator dry Optional Auto operation Air volume amp set temp are automatically selected for comfort A ie Optional Convenienc artificial intelligence on Cooling Heating mode Auto restart operation When power returns after a power failure unit restarts in the previous operating mode Forced operation Operation without remote controller Sleep mode Air volume amp set temp are automatically changed for com fortable sleep Timer on off Operation by Timer setting Individual control Wireless remote controller Wireless remote controller simple Optional simple Special Function Low ambient operation For operation at low temp amp KIT Outdoor Normal Outdoor Control Comp
50. j Yes Change PCB Neutral Signal line and GND POWER SUPPLY TO INDOOR UNIT Is it normal Jj Yes Is connector for communication m No Correct connection 59 Only for training and service purposes NA Ed A CHO5 is displayed at indoor unit CH53 is displayed at outdoor unit LGE Internal Use Only 5 Trouble Shooting 6 11 Check code Trouble shooting CH21 Ge Title Cause of error Check point 4 Normal condition e An instant over current in the U V W phase Comp lock e Instant over current The abnormal connection of U V W 21 DC Peak e Over Rated current Over load condition e Poor insulation of IPM Overcharging of refrigerant Pipe length e Poor insulation of compressor Check Flow Chart Check the wire connection U V W Is it normal No Correct gy Yes connection Check the resistance of comp No difference at each terminal Is it normal E No Change y Yes Compressor Check the electricity leakageof the compressor Refer to comp check table Is it normal y Yes Check the input power Outdoor Indoor unit No Change Compressor Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Is it normal 1 Ph 230V 10 M No 3 Ph 400V 10 Needs electric work Jj Yes Check DC link capacitor Is it normal No Check Over load condition
51. key is input the upper lower vanes are reset to those of the initial cooling mode and then operated in order that the air outflow could reach further Copyright 2008 LG Electronics Inc All right reserved 10 Only for training and service purposes LGE Intemal Use Only Part2 Functions 8 Controls 3 Air purif 3 1 PLASMA Air Purifying System The PLASMA Air Purifying System not only removes microscopic contaminants and dust but also removes house mites pollen and pet fur to help prevent allergic diseases like asthma This filter that can be used over and over again by simply washing with water Dust electrode discharge Dust particles e lonizer Photo Catalyst Coated Mesh a ate Q ke e ISO NS gt Se SLL kas kd _ AF a Polluted Air Purified fresh Air xe ma w aie Q E gt Odour Generating plasma Odour molecule Copyright 2008 LG Electronics Inc All right reserved 11 Only for training and service purposes LGE Internal Use Only Part2 Functions 8 Controls 4 1 Hot start e When heating is started the indoor fan is stopped or very slow to prevent the cold air carry out e When the temp of heat exchanger reach 30 C model by model indoor fan is started 4 2 Self diagnosis Function e The air conditioner installed can self diagnosed its error status and then transmits the result to the central control Therefore a rapid countermeasure against failure of the air conditioner allows easy managem
52. l right reserved Only for training and service purposes LGE Internal Use Only 6 14 Check code Trouble shooting CH24 5 Trouble Shooting Ge Title Cause of error Check point amp Normal condition e Low High press e Check the connection of CN PRESS en AS MEN S W open e Check the SVC V V open e Check the leakage of refrigerant Check Flow Chart Is the wire connection No normal y Yes Is the soldering state of connector is Correct connection E No normal Re soldering component y Yes Is the SVC Valve opened No Open SVC Valve y Yes Check the leakage of refrigerant Check Pressure of suction pipe Check Pressure of discharge pipe Is it normal y Yes Change main PCB gt No Re vaccuming system 8 Re charging Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Pressure switch table Switch Spec Model Low pressure switch 0 03 Mpa AUUW126C AUUW186C High pressure switch 4 3 Mpa AUUW246D AUUW306D AUUW366D AUUW426D AUUW486D AUUW606D AUUW368D AUUW428D AUUW488D AUUW608D 63 LGE Internal Use Only 5 Trouble Shooting 6 15 Check code Trouble shooting CH26 CH27 Ge Title Cause of error Check point amp Normal condition e Check the connection of comp wire U V W D e 4 H H 26 S SC Compressor e Malfunction of compressor position detect error e Che
53. n Copyright 2008 LG Electronics Inc All right reserved 14 Only for training and service purposes LGE Intemal Use Only Part 2 Functions amp Controls 5 1 2 Heating Mode Thermo KI RA OFF 2 C 1 1 IN ai Setting Temp 7 i NV Comp Higha pLow Comp OFF High lt p Low Comp OFF Frequency i ee Comp ON Comp OFF Comp ON Comp OFF e Operating frequency of compressor depend on the load condition The difference between the room temp and set temp frequency restrictions e If compressor operates at some frequency the operating frequency of compressor cannot be changed within 30 sec onds e Condition of compressor turned off When intake air temperature reaches 4 C above the setting temperature e Condition of compressor turned on When intake air temperature reaches 2 C above the setting temperature Condition of indoor fan turned off While in compressor on indoor pipe temp lt 20 C Option While in compressor off indoor pipe temp lt 30 C Option e While in defrost control between the indoor and outdoor fans are turned off e Compressor 3 minutes delay After compressor off the compressor can restart minimum 3 minutes later NOTE Some Models are different by temperature of thermo ON OFF Copyright 2008 LG Electronics Inc All right reserved 15 Only for training and service purposes LGE Internal Use Only Part2 Functions 8 Controls
54. n by TAO Outdoor temp AStep TAI step compensation by TAI Indoor temp AStep DTAI Step Compensation of temperature difference Indoor Temp and Setting Temp k Target frequency step Step base exceeds maximum step the Step base value follows the maximum step value k The compressor get the minimum step in case Step base value is lower than the minimum step of operating capacity Copyright 2008 LG Electronics Inc All right reserved 21 Only for training and service purposes LGE Internal Use Only Part3 Control logic 2 3 Setting value Cooling AStep TAO step compensation by Outdoor temp Working ratio A OOS EE paan Opio AAP E dl o a Pull Over load Low down f ambient Temp C AStep TAI step compensation by Indoor temp Working ratio 106 ey Option aaa Eesebuer Sep AA 15 24 so 38 Temp C AStep DTAI Step Compensation of temperature difference between indoor temp and setting temp 40 110 Copyright 2008 LG Electronics Inc All right reserved 22 Only for training and service purposes LGE Intemal Use Only Part3 Control logic 2 4 Setting value Heating AStep TAO step compensation by Outdoor temp Working ratio 120 KEES Option E 100 sst Esseg E Option oo Low Temperature E working i Over load a TTT 18 4 10 32 Temperature C AStep TAI step compensation by Indoor temp Working ratio 420 ono Option i
55. ng Compressor e Check the voltage between brown and blue cable of terminal to connect the Outdoor About AC220V 240V e Check the related circuit of relay in Outdoor PCB Ass y Check Point Comp ON Comp OFF Between Micom No 19 and GND DC 5V DC OV Between ICO1M No 10 and DC iv DC 12V GND n Turn off main power y Check the electrical wiring diagram of Outdoor side Check the open or short of connecting wires between Indoor and Outdoor Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for a repair Internal components and circuit boards are at main potential when the A equipment is connected to the power cables This voltage is extremely dangerous and may cause death or severe injury if come in contact with it Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Copyright 2008 LG Electronics Inc All right reserved 52 Only for training and service purposes LGE Intemal Use Only 6 4 When indoor Fan does not operate Tum off main power Check the connection of CN FAN Check the Fan Motor t Check the Fuse AC250V T2A 5 Trouble Shooting Check the related circuit of indoor Fan Motor e The pin No 8 of micom and the part for drivi
56. ng SSR Q01M e Check the related e Check the SSR pattern SSR Open Indoor Fan Motor never operate SSR short Indoor Fan Motor always operates in case of ON or OFF Turn on the main power Check the SSR high speed operation by remote control the Indoor Fan Motor is connected The voltage of Pin No 1 orange and 3 black of CN FAN y y About AC 160V over About AC 50V over i y SSR is not damaged Check SSR A Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for a repair Internal components and circuit boards are at main potential when the equipment is connected to the power cables This voltage is extremely dangerous and may cause death or severe injury if come in contact with it A Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Copyright 2008 LG Electronics Inc All right reserved 53 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 6 5 When the louver does not operate e Confirm that the vertical louver is normally geared with the shaft of Stepping Motor e If the regular torque is detected when rotating the vertical louver with hands Normal e Check the connecting condition of CN U D or CNOL R Connector e Check the
57. ngeove A clean Oxygen generator V 4way Nano Plasma F Negative ion A Clean Oxygen generator W Dry contact Y Basic Low A 11 Serial No 1 9 LG Model Development Serial No Copyright 2008 LG Electronics Inc All right reserved 6 Only for training and service purposes LGE Internal Use Only Part2 Functions 8 Controls J 2 Functions amp Controls 1 List of Functions amp Control SS iii 8 le AA 9 2 1 Auto swing left amp right ma aaa eet ee 9 2 2 Auto swing Up amp COW a dad 9 2 3 Chaos swing UP GOWN nadando ana 9 SEENEN eebe ee 10 2 5 Chaos wind auto WIND EE 10 2 6 Jet Cool Mode Operation sida 10 3 AE purifying vedat caia aria LA bbc 11 del PLASMA AI Puring SYSICIN ceda 11 O A 12 A ANG AA NANG AALAGA PANAPAAN AA 12 4 2 SCl GiaAGNOSiS FUNGUO issie isien ghana amahan pana lie 12 A Baka ra ASAE an paa ba kaaya TU aE EAE 12 5 Convenience Functions amp Controls nono no kanaan 13 5 1 Auto Changeover Operation u s nananana 13 5 2 Forced operation AA AA AR ANA 17 5 3 Sleep Timer OO dai 17 Copyright 2008 LG Electronics Inc All right reserved 7 LGE Internal Use Only Only for training and service purposes Part 2 Functions amp Controls Category Function Description Remark Auto swing left amp right Horizontal Airflow Direction control Optional Auto swing up amp down Vertical Airflow D
58. ntemal Use Only 4 Test Run START Test operation for indoor unit Operate the unit in cooling mode 9 Refer to part4 6 Electric part Does Test operation start Yes Is cold air discharged for No more than 3 minutes Yes Refer to part4 5 Cycle part Is there any temperature difference between intake and discharged air Yes Is the operating current No Check the load In Out Temp normal Check pipe length and amount of Yes refrigerant Check for abnormal sound in outdoor unit comp Fan others Operation mode change to Heating mode Is hot air discharged No Refer to Troubleshooting After Hot Start Guide Yes Normal e Each indoor unit should be tested e If the unit has accessory it should be tested Copyright 2008 LG Electronics Inc All right reserved 41 Only for training and service purposes LGE Internal Use Only 4 Test Run 3 Test F 1 Check that all tubing and wiring have been properly con nected 2 Check that the gas and liquid side service valves are fully open Settlement of outdoor unit e Anchor the outdoor unit with a bolt and nut a10mm tightly and horizontally on a concrete or rigid mount e When installing on the wall roof or rooftop anchor the mounting base securely with a nail or wire assuming the influence of wind and earthquake e In the case when the vibration of the unit is conveyed to the hose secure the unit with an anti vi
59. oblem still persists Replace display PCB Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for a repair Internal components and circuit boards are at main potential when the A equipment is connected to the power cables This voltage is extremely dangerous and may cause death or severe injury if come in contact with it Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Copyright 2008 LG Electronics Inc All right reserved 51 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 6 3 The Compressor Outdoor Fan are don t operate Turn on the main power y Operate Cooling Mode by setting the disired temperature of the remote controller is less than one of the Indoor temperature by 1 C at least y When in air circulation mode compressor outdoor fan is stopped Check the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange EVA When the sensor circuit for Indoor temperature and connector are in bad connection or are not engaged Compressor Outdoor fan is stopped e Check the related circuit of RO2H 12 1K RO1H 1K RO4H 6 2K RO3H 1K CO1H 102 C02H 102 Micom pin No qp 2 e Check the Indoor temperature sensor is disconnected or not about 10K at 25 C EE Check the Relay RY PWR RY START for drivi
60. on status between PCB and fan motor E No Remove obstruction Is it normal y Yes Check the DC Motor signal E No Correct connection Or re soldering PCB Is it normal E No Change Indoor Motor Copyright 2008 LG Electronics Inc All right reserved 58 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 6 10 Check code Trouble shooting CH05 CH53 Di h E po paid Title Cause of error Check point amp Normal condition e The connector for trans mission is disconnected j cie Ahn e Check power input AC 230V Outdoor Indoor 05 inati i issi P mme The communication ine he ened ka tare ndoor Outdoor i 53 8 bakas PCB is e Check transmission circuit of outdoor PCB e Check transmission circuit of indoor PCB abnormal e Indoor PCB is abnormal e Synchro of IDU is abnormal e Check of IDU setting DIP SW Check Flow Chart Check the communication wires are correctly Copyright 2008 LG Electronics Inc All right reserved Check the input power AC230V Outdoor Check the resistance between communication Normal Over 2MQ correctly connected Indoor unit Is it normal 230V 10 Jj Yes E No Needs electric work connected Is it normal m No Adjust the connection y Yes of wire Confirm the wire of Live Is the connection of GND GND1 GND2 M No correctly connected Correct connection J
61. output DC voltage of Current Transformer CT 2 Current Transformer Sensing Error 1 In initial power input if the CT output is over 4 0V 25A it shows Self Diagnosis Error Mode 40 defect in CT1 or CT2 detection 5 2 Operating process CT 1 detection 1 If total current exceeds CT1 value reduce inverter operation by 1 step Step down 10Hz from current step If new Hz is below minimum Hz of operation cooling amp heating then turn off the compressor 2 After step down still if the total current exceed CT1 for more than 5 sec then step down inverter operation by 1 more step 3 If the current continue below CT1 for more than 1 min return the to setting step Hz CT 2 detection 1 If total current exceeds CT2 turn off compressor And after 3 min turn on the compressor and check the current again 2 If CT2 occurs 5 times in 1 hour stop the operation and shows Self Diagnosis Error Mode 22 Copyright 2008 LG Electronics Inc All right reserved 26 Only for training and service purposes LGE Intemal Use Only Part3 Control logic Model Cooling Heating CT1 CT2 CT1 CT2 ASUW306DGMO 16 19 17 19 1 Phase ASUW366DGMO 16 19 17 19 5 Hz Option Down 5Hz Option OFF Down Frequency Setting Frequency fixed i frequency fixed Frequency Setting Frequency Hz frequencyi fixed Copyright 2008 LG Electronics Inc All right reserved 27 Only for
62. ower vane automatically operates with the chaos swing or it is fixed to the desired direction CLOSED 110 120 NOTE Some Models are different by swing width and swing pattern Copyright 2008 LG Electronics Inc All right reserved 9 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 2 4 Air flow step Step Discription e Indoor f t trol h 6 steps ndoor fan motor control have 6 steps CL Very own heating mods e Air volume is controlled SH H Med Low by remote controller L oW e LL step is selected automatically in Hot start operation Med H High SH Super high Auto Chaos wind 2 5 Chaos wind auto wind e When Auto step selected and then operated the high medium or low speed of the airflow mode is operated for 2 15 sec randomly by the Chaos Simulation 2 6 Jet Cool Mode Operation e While in heating mode or Fuzzy operation the Jet Cool key cannot be input When it is input while in the other mode operation cooling dehumidification ventilation the Jet Cool mode is operat ed e In the Jet Cool mode the indoor fan is operated at super high speed for 30 min at cooling mode operation e In the Jet Cool mode operation the room temperature is controlled to the setting temperature 18 C e When the sleep timer mode is input while in the Jet Cool mode operation the Jet Cool mode has the priority e When the Jet Cool
63. remote controller Faulty PCB Remote e Main PCB Volt DC12V controller Noise interference e Connection wire break Check Flow Chart CN REMO Check the wire dP connection Open SCH WT Short Miswirring kV PCS AGH 0 WHS WYO A Is it normal E No Correct connection y Yes Or change connection wire 7 Is the soldering state S E No of connector is normal Re soldering component Or change the PCB y a Wired R C S 12V GND YL RD BR Check the volt of main PCB power source DC 12V DC 5V Is it normal E No Correct connection y Yes Or change the PCB Indoor Unit 12V S GND RD YL BR Check the installation of wired remote controller Noise interference Is it normal No Adjust the state Check the Volt Check the Volt of installation Copyright 2008 LG Electronics Inc All right reserved 56 Only for training and service purposes LGE Internal Use Only 6 8 Check code Trouble shooting CH04 5 Trouble Shooting Displ ig Title Cause of error Check point amp Normal condition e Float switch e The connection of wire Drain pump Float switch 04 Drain pump Mor nG Hana e Drain pump power input 220V Float switch ie Se D e Drain tube installation Aero e Indoor unit installation Inclination Check Flow Chart Check the level of water Float moves
64. s Charging E 48 SOV CIE Palaman E E E Aaah 49 6 Electronic PANTS se cirio iii 50 Copyright 02008 LG Electronics Inc All right reserved 43 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 1 Sel 1 1 Error Indicator Indoor e The function is to self diagnosis air conditioner and express the troubles if there is any trouble e Error mark is displayed on display window of indoor units and wired remote controller and LED of outdoor unit control board e If more than two troubles occur simultaneously lower number of error code is first displayed e After error occurs if error is released error LED is also released simultaneously x O O OG 1 digit 10 digit Ex Error 21 DC Peak A 2 Times 2 Times 2 Times 10 digit i1 Sec 3 4 Sec 1 Ser LED 1 2 Indoor Error Error code Description INV TPS tasa eun ei 00 No Error ON 01 Indoor Room themistor error o itime 9 OFF 02 Indoor in piping sensor error o 2times Y OFF 03 Remote controller error o 3times A OFF 04 Drain Pump error o 4times 9 OFF 05 Communcation error between in and out o 5times Y OFF 06 Indoor Out Piping sensor error o 6times Y OFF 07 Differnt mode operation o 7times A OFF 09 Checksum error 9times Y OFF 10 BLDC motor fan lock indoor o 10times Y OFF Copyright 2008 LG Electronics Inc All right reserved 44 Only for tra
65. soldering condition on PCB of CN U D or CNOL R Connector Check the operating circuit of the vertical louver e Confirm that there is DC 12V between pin of CN U D CNOL R and GND e Confirm that there is a soldering short at following terminals Between D and 0f MICOM Between 47 43 49 and of MICOM Between and 0of IC01M Between O and 0f ICO1M If there are no problems after above checks e Confirm the assembly condition that are catching and interfering parts in the link of the vertical louver A Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for a repair Internal components and circuit boards are at main potential when the equipment is connected to the power cables This voltage is extremely dangerous and may cause death or severe injury if come in contact with it A Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred l 54 Copyright 2008 LG Electronics Inc All right reserved LGE Internal Use Only Only for traini ng and service purposes 5 Trouble Shooting 6 6 Check code Trouble shooting CH01 CH02 CH06 pu Title Cause of error Check point 4 Normal condition l e Connector connection error Normal resistor 10KQ at 25 C Unplugged 01 Indoor air sensor e Faulty PCB Normal voltage 2 5Vdc at 25 C Plug
66. ture and pressure of refrigeration cycle in cooling mode Suction pressure Temperature of Compared with Discharge Air Compared Cause of Trouble Description the normal value With the normal valve Hi Defective compressor Current is low igh Defective 4 way reverse valve Higher Excessive amount of High pressure does not quickly Normal refrigerant rise at the beginning of operation Insufficient amount of Current is low Lower Higher refrigerant Leakage Clogging 1 The suction pressure is usually 8 5 9 5kg cm2G Cooling at normal condition R410A 2 The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for a repair Internal components and circuit boards are at main potential when the AN equipment is connected to the power cables This voltage is extremely dangerous and may cause death or severe injury if come in contact with it Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Copyright 2008 LG Electronics Inc All right reserved 49 Only for training and service purposes LGE Internal Use Only 5 Trouble Shooting 6 Electro 6 1 The Product doesn t operate at all Turn off the main power and wait for 10 seconds Turn on the main power again A B

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