LG Electronics General Wall Mounted-Inverter Type Air Conditioner User Manual
Contents
1. Kd Title Cause of error Check point amp Normal condition e Open Short 4 e Normal resistor 200kQ at 25 C 77 F Unplugged 41 D pipe sensor Inverter Soldered poorly i E o Internal circuit ertor Normal voltage 4 5VDC at 25 C 77 F plugged Open Short EE 44 Air sensor e Soldered poorly i mo es i SE SE Internal circuit error Normal voltage 2 5VDC at 25 C 77 F plugged EE Normal resistor 5kQ at 25 C 77 F Unplugged 45 Condenser Pipe sensor Soldered poorly K SAE S e Internal circuit error e Normal voltage 2 5VDC at 25 C 77 F plugged e Open Short nee es 46 Suction Pipe sensor Soldered poorly e Normal resistor 5kQ at 25 C 77 F Unplugged Internal circuit error e Normal voltage 2 5VDC at 25 C 77 F plugged e Open Short e Normal resistor 200kQ at 25 C 77 F Unplugged D pipe sensor Constant Soldered poorly a E EES Internal circuit error e Normal voltage 4 5VDC at 25 C 77 F plugged e Open Short 65 Heat sink sensor e Soldered poorly e Normal resistor 10kQ at 25 C 77 F Unplugged Internal circuit error e Normal voltage 2 5VDC at 25 C 77 F plugged Check Point 1 Estimate the resistance of each sensor Unplugged 2 Estimate the voltage of each sensor Plugged 3 If the resistance of the sensor is 0 kQ or then sensor is abnormal 64 Room2. Mode8 OPEN S5 18 24kBtu h Model Cooling Operation Heating Operation CLOSED Mode6 pr d SC Mode4 OPEN SD 30kBtu h Model Cooling Operation Heating Operation CLOSED CLOSED 110 Mode 8 sersa Mode 8 tesen Mode 7 A Mode 7 E Mode 6 cmg AT ID Code 6 N vg Ha Mode 5 Mode 5 Mode 4 ws Mode 4 Mode 3 M Mode3 TT et e Mode 2 Bag Mode 2 Mode 1 OPEN OPEN NOTE Some Models are different by swing width and swing pattern 14 Room Air Conditioner Part2 Functions amp Controls 4 6 Sleep mode Auto control e When the set sleep time is reached set time of 1 2 3 4 5 6 7hour input by the remote control during the operation the operation of the appliance stops e When the appliance is on pause the sleep timer mode cannot be input 4 6 1 Sleep timer operation for cooling cycle e While in cooling mode 30 min after the start of the sleep timer the setting temperature increases by 1 C 2 F After another 30minutes lapse it increases again by 1 C 2 F Setting temp C Cooling ON temp Setting temp 0 5 C 1 F Cooling OFF temp Setting temp 0 5 C 1 F gt 0 5 1 Sleep time hour 4 6 2 Sleep timer operation for heating cycle e While in heating mode 60 min after the start of the sleep timer the setting temperature decreases by 1 C 2 F After another 60minutes lapse it decreases again by 1 C 2 F Setting tem
3. amp DC 5V Check point e Check the connecting circuit between MICOM PIN amp and CN DISP1 PIN e Check receiver ass y 42 Room Air Conditioner Part 4 Trouble Shooting Trouble 3 The Compressor Outdoor Fan don t operate 9 30kBtu h Model Turn on the main power Q 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 J When in air circulation mode compressor outdoor fan is stopped Q Check the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange EVA J When displaying Error code refer to the trouble shooting guide J Check the main power source AC 208V 230V Check the trouble shooting guide error code 6 9 J Turn off main power J Check the electrical wiring diagram of Outdoor side Check the open or short of connecting wires between Indoor and Outdoor Service Manual 43 Part 4 Trouble Shooting Trouble 4 The Compressor Outdoor Fan don t operate 18 24 30kBtu h Model Turn on the main power J 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 Q When in air circulation mode compressor outdoor fan is stopp
4. 7 C 44 6 F Comp free 6 C 42 8 F 3 C 37 4 F T1 Comp Step 4 Comp Step 2 T1 0 2 C 32 35 6 F NOTE Some Models are different by T1 16 Room Air Conditioner 5 5 Automatic defrost 5 5 1 9 12kBtu h Model Part 2 Functions amp Controls e While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit e Defrosting control is available 40 minutes later since heating cycle started and the difference of the pipe tem perature of outdoor unit reaches above option 1 e The defrosting control is available without reference to heating operation time only if the pipe temperature of outdoor unit reaches below option 2 The mean outdoor temperature 10 C 14 F less than 10 5 C 14 23 F between 5 0 C 23 32 F between 0 C 32 F more than Option 1 gt 4 gt 5 gt 5 The minimum Time of Heating sec Expected heating operating time And Heating operating t ime 40 minutes Option 2 Minimum Time Of Heating Operating Setting Freq Freq Of Comp Comp off Inapplicable Operating Freq Of Comp Comp off Applicable Setting Freq The Degree of Superheat EEV Control Open step 4 Way Setting Speed Indoor FAN Setting Speed Indoor gt FAN Pre Heat LED Deice STEP I Ssec 5seci 30 M
5. Refrigerant leakage Clog of refrigeration cycle Defective compressor Excessive amount of refrigerant Normal Temperature difference between intake and discharge air depends on room air humidity When the room air humidity is relatively higher temperature difference is smaller When the room air humidity is relatively lower temperature difference is larger Service Manual 39 Part 4 Trouble Shooting 2 Check temperature and pressure of refrigeration cycle Suction pressure Compared with the normal value Temperature Compared with the normal value Cause of Trouble Description High Defective compressor Current is low Higher Normal Excessive amount of High pressure does not quickly 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 5 kg cm g at normal condition 2 The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty 40 Room Air Conditioner Part 4 Trouble Shooting 6 Electro Trouble 1 The Product doesn t operate at all 9 30kBtu h Model Turn off the main power and wait until LED on outdoor PCB is off Turn on the main power again Does Beeping sound is made from the indoor unit Does Lighting LED is mounted on the outdoor PCB TE Check the voltage of power AC 208 230V 60Hz
6. e Primarily the operating condi tion of Micom is O K e The voltage of main power e The voltage applied to the unit JL e The connecting method of Indoor Outdoor connecting cable each color e The P W B Ass y Fuse Noise Filter Power Module SMPS IC01D IC04D Check CN DISP1 The operation check of the P C B Ass y Procedure Specification Remedy 1 The input voltage of Power DC 220V 390V Module SMPS 2 The output voltage of Power 15V 10 Replace the P C B Module SMPS 3 IC01D LD1085 IC04D 7805 DC 5V Service Manual 41 Part 4 Trouble Shooting Trouble 2 Product doesn t operate with the remote controller 9 30kBtu h Model Turn on main power JL While the compressor has been stopped the compressor does not operate owing to the delaying function for 2 minutes after stopped 2 When the compressor stopped Indoor Fan is driven by a low speed At this point the wind speed is not controlled by the remote controller When operated in the Sleeping Mode the wind speed is set to the low speed as force Sie JL Caused by the remote controller Caused by other parts except the remote controller EE es When the mark 4 is displayed in LCD screen replace battery Check the contact of CN DISP 1 2 connector ee Check DISP P C B Ass y Voltage between CN DISP1
7. 2MQ gt Adjust the load condition 3 Check the electricity leakage of the compressor gt Normal Over 2MQ 4 Check the resistance of compressor gt Normal 0 65Q INV 0 8Q Cons gt No difference at each terminal 5 Check the insulation from water at IPM part gt Check the trace of water 6 Check the IPM circuit 58 Room Air Conditioner 4 Troubleshooting CH21 CH22 Part 4 Trouble Shooting CTOIN SE Title Cause of error Check point amp Normal condition Malfunction of compressor 21 Max C T Over current 14A 1 DE Refrigerant pipe length blocked C T 8 Malfunction of current detection circuit SS ME dee e e N is 4 0VDC 25A 1 Check Point 1 Check the power source 2 Check the fan operation is right 3 Check the current 4 Check the install condition 5 Check the internal circuit C T Diode Resistor Service Manual 59 Part 4 Trouble Shooting 5 Troubleshooting CH23 CH28 a Title Cause of error Check point amp Normal condition 23 DC Link DC link volt is Check the power source Low voltage 140VDC Check the components DC Link e DC link volt is e Check the power source 28 High voltage 420VDC 1 e Check the components D s Check Point 26 8mH 9A 1 Check the power source 2 Check the components B Diode Reactor PSC Parts BDOIS 02 RBV2506 RBV1506 60 Roo
8. Freeze prevention Evaporator frost prevention Automatic Defrost Condenser frost prevention Power Relay Control Over current prevention Inverter with inverter power control Modulation of voltage amp frequency Overheating Protection Power Module To protect power module Total Current Control Over Current Protection To protect power device DC Peak Control To protect power module Discharge Pipe Temp Control For overheating protection Low Ambient Function For operation at low temp Oil Return Control To protect compressor Oil Equalizing Control To protect compressor NOTE The Exploded View SVC Manual has the particular Function table for each model Service Manual 9 Part2 Functions amp Controls 2 1 Cooling Mode 0 5 C 1 F Thermo ON Setting Temp 0 5 C 1 F Thermo OFF INV Comp Frequency High gt Low Comp OFF High ak Low e Operating frequency of compressor depends on the load condition like the difference between the room temp and the set temp frequency restrictions e If 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 1 F of the setting temp limit for three minutes continuously intake air temperature reaches belo
9. 2 18 24 30kBtu h Model e Function Power module failure protection by checking the temperature of heat sink There is a temperature sensor for checking the heat sink temperature e Heat sink sensor failure error Short Check if temperature gt 130 C 266 F Open Check if temperature lt 30 C 22 F System will go in self diagnosis Error code 65 is displayed and product stops e 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 Heat Sink temp Toff 85 C 185 F T2 75 C 167 F T1 70 C 158 F COMP Set 5 Hz Set 5 Hz OFF Set Hz frequency Down frequency Down frequency 22 Room Air Conditioner Part2 Functions amp Controls 5 9 Total Current Control Over Current Protection 5 9 1 9 12kBtu h Model 1 CT1 control e If the operating current reaches 11 the operating frequency of the compressor decreases e After decreasing
10. 9 Cooling Heating Capacity Ex 09 gt 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 74 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 H NBF F A changeove A clean 4way Low 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 changeove 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 Service Manual 7 a Part 2 Functions amp Controls Te Listof Controls amp Functions Londak Eu 9 2 Basic Mode Controls uuanarsnnamnadssnrsmnnnseinnekmsimnvnsnfnniinsii 10 J Special Mode Controls veast kaema tal aku ass 12 4 Utility FUNCOMS ccsaceais cts tencecsensdicatsevecanccccss conaue desatisduesueeenadtanaubsasaceceusacsaabesstawiconancdabanins 13 5 Protection Functi
11. Check Indoor TH Connect to CN TH1 in Measure resistance of TH Check soldering state of indoor pcb assembly air about 10kQ at 25 C 77 F RO1H RO4H CO1H CO2H pipe about 5kQ at 25 C 77 F Description Cause of error e Outdoor TH sensor is short or open Outdoor TH is short or e Outdoor TH sensor is not connected to the outdoor pcb assembly open Damage or defect on the sensing circuit of outdoor pcb assembly RO3H RO6H CO2H CO3H Check flow YES YES Outdoor TH is connected to ae Sensing circuit of outdoor 2 outdoor pcb assembly AAL 7 pcb is right Check outdoor TH Connect to CN TH1 in Measure resistance of TH Check soldering state of outdoor pcb assembly air about 10kQ at 25 C 77 F RO3H RO6H C02H CO3H pipe about 5kQ at 25 C 77 F Service Manual 49 Part 4 Trouble Shooting Description Cause of error i e Heat sink TH is damaged short or open Heat sink Temp is over Se E 95 C 203 F e Heat sink Temp is over 95 C 203 F Heat sink TH is open or short Damage or defect on the sensing circuit of outdoor pcb assembly RO1H RO2H CO1H Check flow YES YES Heat sink TH is connected to Heat sink TH in INV IC is Sensing circuit of outdoor outdoor PCB assembly Right pcb is right Check heat sink TH Measure resistance of TH about 10kQ at 25 C 77 F Check soldering state of RO1H RO2H CO1H Connect to CN
12. Check pipe length and amount of Yes Refer to part4 5 Cycle part refrigerant o h Check for abnormal sound in Peration mode onan outdoor unit comp Fan others to Heating mode Is hot air discharged No Refer to Troubleshooting After Hot Start Guide Yes NOTE When outdoor temperature is low the unit is operated to Heating mode 32 Room Air Conditioner 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 10mm 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 vibration 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 Discharge temperature 4 For reference the gas side pressure of optimum condition is as below Cooling Outside
13. Confirm the wire of Live Neutral wo Check the resistance between communication line and GND Normal Over 2MQ 4 Check the connector for communication is correctly connected Check the connection of GND1 GND2 and main GND If one indoor unit is operated normally outdoor PCB is no problem oi D Check the another indoor unit CHO5 is displayed at indoor unit CH53 is displayed at out POWER TO INDOOR door unit SUPPLY UNIT Service Manual 57 Part 4 Trouble Shooting 3 Troubleshooting CH21 eng Title Cause of error Check point amp Normal condition An instant over current in the U V W phase Comp lock Instant over current The abnormal connection of U V W 21 DC Peak e Over Rated current Over load condition e Poor insulation of IPM Overcharging of refrigerant Pipe length Poor insulation of compressor Comp D Resistance Q at 20 C 68 F Inverter Constant Terminal comp comp V Q 0 64 0 8 0 64 0 8 N 0 64 0 8 Copper Check Point 1 Check the wire connection U V W 2 Check the load condition Refrigerant Pipe length Resistance Q at 20 C 68 F Terminal Inverter comp Constant comp U GND 2MQ 2MQ V GND 2MQ 2MQ W GND 2MQ
14. Error Code 22 Model Cooling Heating CT 2 kBtu h CT 1 CT 1 18 30 11A 12A 14A 24 Room Air Conditioner Part2 Functions amp Controls 5 10 DC Peak control 5 10 1 DC Peak Current Error by a fault signal of IPM e If the operating current of IPM reaches 35A 3A the compressor stops instantly If DC PEAK occurs 5 times within 1 hour the appliance turns off and displays Error Code 6 9 12kBtu h Model Error Code 21 18 24 30kBtu h Model 5 10 2 DC Peak Current Error by the compressor lock e If the DC LINK voltage below DC 140V occurs 5 times within 1 hour while the compressor is operating the appliance turns off and display Error Code 6 9k 12k Model Error Code 23 18k 24k 30k Model 5 10 3 DC Peak Current Error by the Outdoor Fan Lock e If this problem occurs 5 times within 1 hour in case of the temperature of outdoor pipe TH is over 65 C 149 F while the compressor is operating the appliance turns off and displays Error Code 6 9 12kBtu h Model Error Code 61 18 24 30kBtu h Model 5 11 Discharge Pipe Temp Control 5 11 1 9 12kBtu h Model e If the temperature of the discharge pipe of compressor reaches over 130 C 266 F or below 30 C 22 F the com pressor stops instantly e The compressor operating frequency is limited according to the compressor dome TH Refer to below Fig e Temperature range of COMP SPEC varies by 10 C 50 F D Pipe Temp AT g w Te T3 T2 AT 13
15. Oil separator bypass valve make OFF after 75 seconds from the time of 30Hz NOTE Comp frequency and EEV pulse is different each models Service Manual 19 Part2 Functions amp Controls 5 6 Power Relay Control e Power relay turns on 1 second later after the power is supplied to the outdoor unit e Control sequence power on gt PTC operating gt power relay on 5 7 Inverter 1 The single phase power AC is converted into DC 2 The single phase power DC is converted into a three phase chopped DC voltage with a variable frequency 3 When the frequency changes the rotation speed of the compressor changes resulting in an changed refrigerant circu lation This leads to changeable amount of the heat exchange per unit 20 Room Air Conditioner Part2 Functions amp Controls 5 8 Overheating Protection Power Module 5 8 1 9 12kBtu h Model e If the temperature of the heat sink thermistor reaches over Toff the Compressor stop instantly e The compressor operating frequency is limited according to the heat sink thermistor refer to below FIG e It will blink 4 times when the thermistor is open or short also when the temperature is over T off AT T off T ony3 Heat Sink Temp Ti Ton AT T2 Ton 2 AT T on 85 C 185 F Model by Model T off 95 C 203 F Model by Model NOTE Some Models are different by Ton and Toff Service Manual 21 Part2 Functions amp Controls 5 8
16. Q04F ZDO1F Check outdoor unit Check connector is not remove obstacles in connected to outdoor pcb outdoor unit assembly CN FAN2 54 Room Air Conditioner Part 4 Trouble Shooting Description Cause of error Di e D pipe TH is short or open D Pipe TH is short or e D pipe TH is not connected to the outdoor pcb assembly open e Damage or defect on the sensing circuit of outdoor pcb assembly Check flow YES YES D_PIPE TH is connected to Outdoor pcb assembly Sensing circuit of outdoor See D_PIPE TH is right 7 pob is right Check D PIPE TH Come END PE Measure resistance of TH Check soldering state of in outdoor pcb assembly about 200kQ at 25 C 77 F RO7H RO8H CO4H Service Manual 55 Part 4 Trouble Shooting E Troubleshooting Guide 18 24 30kBtu h Model 1 Troubleshooting CH01 CH02 CH06 pies Title Cause of error Check point amp Normal condition e Open Short EEN 01 Indoor air sensor M Soldered poorly Normal resistor 10kQ at 25 oe F Unplugged EE E circuit error Normal voltage 2 5VDC at 25 C 77 F plugged e Open Short 4 A A Normal resistor 5kQ at 25 C 77 F Unplugged 02 Indoor inlet pipe sensor Soldered poorly A A S s Internal circuit error Normal voltage 2 5VDC at 25 C 77 F plugged l Ge ec Normal resistor 5kQ at 25 C 77 F Unplugged 06 Indoor outle
17. and check Service Manual 33 P Part 4 Trouble Shooting 1 2 Way 3 Way Valve nrrnnnnvnnnnvvnnnnnvnnnnnennnne 2 PUMPING Down mmsevrnsnvvnnnnvennnnvennnnennnnvennr 3 Evacuation All amount of refrigerant leaked rrnnvrrnnnvrnnnvvnnnnvrvnnnvnnnnvnnnvnvnennnnvnnnnnnnnr Ja 5 Self diagnosis Function rrssnvrnnnnvennnvenn 6 Cycle Troubleshooting Guide 7 Electronic Parts Troubleshooting Guide 34 Room Air Conditioner Gas Charging After Evacuation Part 4 Trouble Shooting 2 way Valve Liquid Side 3 way Valve Gas Side Valve cap Hexagonal wrench 4mm Open position Flare nut Flare nut Closed position Open position 8 Closed position n To To piping piping 3 connection connection SS Ep SE Ice To outdoor unit To outdoor unit Works Shaft position Shaft position Service port Shibpin Closed Closed Closed pping with valve cap with valve cap with cap Air purging Open Closed Open Installation counter clockwise clockwise push pin or with vacumm pump A Open Open Closed Open with valve cap with valve cap with cap Pumping down Closed Open Open Transfering clockwise counter clockwise connected manifold gauge Evacuation Open Open Open Servicing with charging cylinder Gas charging Open Open Open Servicing with charging cylinder Pressure check Open Servicing Open Open with charging
18. and vice versa 4 C 8 F Switching point 2 C 4 F Heating thermo off 0 5 C 1 F seting N OZ NZ O Temp l 0 5 C 19F Cooling thermo off 2 C 4 F Switching point 1 i Mode Cooling Heating operation i Cooling operation operation Service Manual 11 Part 2 Functions amp Controls 3 1 Jet Cool operation In the heating mode or Fuzzy operation the Jet cool function does not work When it is input while in other mode of operation cooling dehumidification ventilation the Jet cool operation takes place 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 the room temperature is maintained at a setting temperature of 18 C 64 4 F e When the sleep timer mode is input during the Jet cool operation the Jet cool mode has the priority e When the Jet cool button is pressed the upper lower vane of the unit is reset to those of the initial cooling mode and then operate so that the air outflow could reach further 3 2 Jet Heat operation e While in cooling mode or Fuzzy operation the Jet Heat function does not work When it is input while in the Heating mode operation dehumidification the Jet Heat mode operation takes place e In the Jet Heat mode the indoor fan operated at super high speed for 60 min at Heating mode operation e In the Jet Heat mode the room temperature is mainta
19. 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 8 Torr 4 Disconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil becomes dirty or depleted replenish as needed Service Manual 37 Part 4 Trouble Shooting Outdoor unit Charging cylinder e Procedure This is different from previous procedures Because you are charging with liquid refrigerant from the gas side absolutely do not attempt to charge with larger amounts of liquid refrigerant while operating the air conditioner 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 4 Immediately disconnect the charge hose from the 3 way valve s service port 2 Purge the air from the charge hose Stopping partway will allow the gas to be dis Open the valve at the bottom of the cylinder charged and press the check valve on the charge set to If the system
20. has been charged with liquid purge the air Be careful of the liquid refriger refrigerant while operating the air conditioner ant The procedure is the same if using a gas turn off the air conditioner before disconnecting cylinder the hose 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 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 38 Room Air Conditioner Trouble analysis 1 Check temperature difference between intake and discharge air and operating current Temp difference approx 0 C 1 F Current less than 80 of rated current Temp Difference Temp difference approx 8 C 16 F Current less than 80 of rated current Operating Current Temp difference less than 8 C 16 F Current near the rated current Temp difference over 8 C 16 F Part 4 Trouble Shooting All amount of refrigerant leaked out Check refrigeration cycle
21. Air Conditioner Q If the voltage of the sensor is 0 V or 5VDC then sensor is abnormal 10 Troubleshooting CH51 CH60 Part 4 Trouble Shooting 504 Title Cause of error Check point amp Normal condition 51 EE e Over capacity e Check the indoor unit capacity EE ombiaction e Check the combination table EEPROM Check the PCB ASM P No 60 Check sum SE e Check the poor soldering Check Point CH 51 e CH 60 1 Check the indoor unit capacity 1 Check the insertion condition of EEPROM 2 Check the poor soldering Service Manual 65 Part 4 Trouble Shooting 11 Troubleshooting CH61 CH62 ped Title Cause of error Check point amp Normal condition ki Condenser Condenser pipe sensor Check the load condition pipe sensor detected high Cc i A e Check the sensor of Condenser pipe sensor temp high temp 65 C 149 F ER E e Heat sink sensor d Heat sink sensor e Check the fan is locked 62 temp high DEER e Check the sensor of heat sink temp 85 C 185 F i Heat Sink temp Normal Check Point e CH 61 e CH 62 1 Check the install condition for over load 1 Check the fan is locked Refrigerant Pipe length Blocked 2 Check the Outdoor temp is very high 66 Room Air Conditioner P NO MFL41161601 AUGUST 2007
22. C 8 6 CF COMP Freq T off 110 C 230 F Model by model T2 100 C 212 F Model by model NOTE Some Models are different by T1 and T2 Service Manual 25 Part 2 Functions amp Controls 5 11 2 Inverter Compressor 18 24 30kBtu h Model 1 There can be two situations a Sensor is failed Error Code 41 b Abnormal high temperature discharge temperature error code for high discharge will be generated Both cases unit will stop 2 Compressor working a If discharge pipe temperature T1 No limitation on compressor frequency b T2 lt discharge pipe temperature T off Hysteresis control Compressor frequency down by 5Hz and expan sion valve up by 10 pulse in every 1 min c Discharge pipe 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 D Pipe temp Toff 105 C 221 F T2 95 C 203 F T1 90 C 194 F COMP 5 Hz Set 5 Hz OFF Hz Down Down Expansion 10 10 valve Pulse Up Set Pulse Up Stop control 26 Room Air Conditioner Part2 Functions amp Controls 5 11 3 Constant Compressor only 30kBtu h Model 1 There can be two situations a Sensor is failed Error Code 41 b Abnormal high temperature discharge temperature error code for high discharge will be generated Both cases unit will stop 2 Compressor working a If discharge pipe temperature lt T1 Compr
23. TH2 in outdoor PCB assembly 50 Room Air Conditioner Error code Description Communication Error Check flow Wiring connection Is right Indoor 1 BR 2 BL 3 GN YL 3 GN YL 4 RD YES YES Outdoor Part 4 Trouble Shooting Cause of error Wrong or missing wiring between indoor and outdoor unit cable e Defect of communication components in indoor pcb assembly e Defect of communication components in outdoor pcb assembly e Defect of power supply components in outdoor pcb assembly e No ground connection in air conditioner unit affected by noise in power source YES Is the voltage of T Block 2 in outdoor about AC 208 230V Is the voltage of GND 8 DC5V in Outdoor pcb about DC 5V 1 BR Check power connector Check FUSE NF01 02J PTC 2 BL Is not connected to the Power Module BD 01S in 4 RD Communication circuit of indoor 8 outdoor pcb Is right Check ICO1K ICO2K D01K D03K ZD01K ZD03K RO1K R10K CO1K C04K T Block in indoor unit Outdoor pcb assembly YES Ground connection is installed power outlet or outdoor chassis Earth port Install ground connection from outdoor unit In case power outlet has no earth port Service Manual 51 Part 4 Trouble Shooting Description Cause of error e Supplied power is not normal e Comp Connector CN U V W is disconnected or inserted to wrong position e Compressor is damaged coil short gt replace compress
24. The operation will be started if the ON OFF button is pressed If you want to stop operation re press the button The ON OFF switch is on the display PCB or side of indoor unit 4 2 Auto cleaning operation e Function used to perform Self Cleaning to prevent the Unit from Fungus and bad odor e Used after the Cooling Operation before turning the unit off clean the Evaporator and keep it dry for the next opera tion e The function is easy to operate as it is accessed through the Remote controller Unit Operation OFF E Indoor Fan Setting step L Low OFF Comp Time 13 14 minutes 1 minute 2 3 minutes Service Manual 13 Part 2 Functions amp Controls 4 3 Air volume control Indoor fan motor control have 6 steps Step Description Air volume is controlled SH H Med Low by the remote con LL Very low In heating mode troller L Low e LL step is selected automatically in Hot start operation M Med H High 4 4 Natural Air Control Auto Wind ou Super high e When the Auto Step is selected and then operated the high medi Aue Natural wind um or low speed of the airflow mode is operated for 2 15 sec ran domly by the Chaos Simulation 4 5 Chaos Swing e By the Chaos swing key input the upper lower vane automatically operates with the Chaos swing or it is fixed to the desired direction S4 SE 9 12kBtu h Model Cooling Operation Heating Operation CLOSED
25. adjust and adjust YES Current sensing circuit is right Check current sensing circuit check CT is damaged in outdoor pcb output wire is disconnected to pin or not BDO1N is inserted in right position refer marking on pcb and component Spec of RO1N 1kQ RO2N 1 65KQ is correct Direction of diode DO1N DO2N is right Service Manual 53 Part 4 Trouble Shooting Description Cause of error Indoor fan is locked e Indoor fan is locked or separated Fan connector is not connected to indoor pcb assembly BLDC fan model only e Defective in DC fan driving circuit Check flow YES YES Indoor fan is rotating 1 Indoor fan is rotating 2 DC fan driving circuit is right Check indoor unit Check DC Fan Driving circuit d Check soldering state of Ga remove obstacles in CN Motor1 amp assemblin Soldering state amp Direction indoor unit 9 RO1F RO9F C01F C03F fan assembled correctly SCC ICO1F ICO3F Q01F Q02F ZDO1F Description Cause of error Outdoor fan is locked e Outdoor fan is locked by an obstacle ex branch of tree bar etc e Fan connector is not connected to outdoor pcb assembly BLDC fan model only Defective in DC fan driving circuit Check flow YES YES Outdoor fan is rotating 1 Outdoor fan is rotating 2 DG fan driving circuit is right Check DC Fan driving circuit Soldering state amp Direction RO1F RO5F C01F CO3F Q01F
26. ain Deice time 25 i 30sec 10sec i Step 5 Option 13 Min 6 fion 12 155ec Step 5 Option 13 Min 0 tion 12 300 Option 1 4 Hi Speed Setting Freq Step 3 Option _ 15 Min Optic 12 i Setting i Speed Hot i Super low speed low speed Service Manual 17 Part 2 Functions 8 Controls 5 5 2 18 24 30kBtu h Model e Starting to the defrosting operation 1 Defrost operation will be start when the conditions below are matched a Accumulation time of operation and the period after completion of defrost 35 min b After 10 minutes from re starting the compressor In case of being over 35 minutes of accumulated operating time defrosting operation starts after 10 minutes c Piping temperature of the outdoor heat exchanger maintain below defrost starting temperature for 4 minutes after 35 minutes continuous operation d in case of passing 10 minutes after oil recovery operation 2 Outdoor piping temperature is below than 6 C 21 2 F Option for starting defrosting operation Constant Comp i Tstep 6step 5s 5s lt gt 105 SED Invert Comp l m is i i oe 60s Option Os 30s 30s 30s i iN j 30 Hz y SE a A m Option 100 Hz Option 2min 2min 350 Pulse Option Control 1 2 Outdoor EEV db Reversing Valve Hot gas bypass i Option Oil separator Bypass valve Indoor Fan ON OFF Outdoor Fan I o Hi
27. 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 em G 120 135 P S 1 G Part 3 Test Run 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 PUMP DOWN This is performed when the unit is to be relocated or the refrigerant circuit is serviced Pump Down means collecting all refrigerant in the outdoor unit without loss in refrigerant gas CAUTION Be sure to perform Pump Down procedure with the unit in cooling mode Pump Down Procedure 1 Connect a low pressure gauge manifold hose to the charge port on the gas side service valve 2 Open the gas side service valve halfway and purge the air from the manifold hose using the refrigerant gas 3 Close the liquid side service valve all the way in 4 Turn on the unit s operating switch and start the cooling operation 5 When the low pressure gauge reading becomes 1 to 0 5kg cm G 14 2 to 7 1 P S 1 G fully close the gas side valve stem and then quickly turn off the unit At that time Pump Down has been completed and all refrigerant gas will have been collected in the outdoor unit 5 Check operating current 6 Change operation mode
28. anal vad Eka Aage 2 Test R n FIOW Chart E alul alkaalid m nud Eege 3 Test RUN Detal E arteri ccs A cass fed deed deet kudu tulu dnne aina leti 30 Room Air Conditioner Part 3 Test Run 1 Check to see whether there is any refrigerant leakage and check whether the power or transmission cable is connected properly Check whether the 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 Service Manual 31 Part 3 Test Run A START Test operation for indoor unit Operate the unit in cooling mode 9 Refer to part4 7 Electric part Does Test operation start Yes Is cold air discharged for more than 3 minutes Yes Is there any temperature difference between intake and discharged air Yes Is the operating current No Check the load In Out Temp normal
29. art 4 Trouble Shooting E 18 24 30kBtu h Model Indoor Error Error code Descrition INV TPS LER FENG Indoor Red Green Status 00 No Error ON 01 Indoor Room themistor error 1time OFF 02 Indoor in piping sensor error e 2times OFF 03 Remote controler error e 3times I OFF 04 Drain Pump error 4times I OFF 05 Communcation error between in and out e 5times I OFF 06 Indoor Out Piping sensor error e 6times OFF 07 Diffrent mode operation o 7times A OFF Outdoor Error Ex Error Code 21 IPM Fault 2 Times 2 Times 2 Times LED01G I i lt gt i RED gt i Sec ii 1S8ec 1 1See LED02G GREEN LEDO1G LEDO2G Outdoor Contents Red Green Case of error Status IPM Fault Compressor Over current 2 times I 1 time Compressor malfunction IPM Fault Off CT 2 Max Current 2 times 9 2 times 9 Current is 14A t Off DC Link Low Volt 2 times 9 3 times 9 DC Link volt Is 140V 4 Off Low High press 2 times 9 4 times 9 Low High press switch OPEN AC Low AC High Volt 2 times 5 times Abnormal AC volt Input DC Compressor Position 2 times 9 6 times D PSC Fault 2 times 9 7 times 9 DC Link High Volt 2 times Q 8 times 9 Discharge Pipe Temp High INV 3 times 9 2 times 9 Discharge Pipe Temp High Cons 3 times 9 3 times Q Service Manual 47 Part 4 Troub
30. cylinder Gas releasing A Open Servicing Open Open with charging cylinder Service Manual 35 Part 4 Trouble Shooting Purge the air 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 the 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 36 Room Air Conditioner 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 torgue wrench to tighten the service port nut to a torgue of 1 8 kg m Be sure to check for gas leakage Part 4 Trouble Shooting Outdoor unit e Procedure 1 Connect the vacuum pump to the
31. d s About AC 50V over JL Check SSR Service Manual 45 Part 4 Trouble Shooting H Error Indicator e The function is to self diagnoisis airconditioner and express the troubles identifically if there is any trouble e Error mark is ON OFF for the operation LED of evaporator body in the same manner as the following table e If more than two troubles occur simultaneously primarily the highest trouble fo error code is expressed e After error occurrence if error is released error LED is also released simultaneously e To operate again on the occurrence of error code be sure to turn off the power and then turn on e Having or not of error code is different from Model H 9 12kBtu h Model Display Indoor Outdoor 1 time ttime ttime ttime ttime e Indoor Temp sensor error Sensor open or short O 2times 2times 2times A 2times Error Indicator Cause of Error Outdoor Temp sensor error Sage Gene Sensor open or short L E gt e Heat Sink sensor error Le bk Sensor open or short 23sec Heat Sink temp is over 95 5times 5times I d Communication error 3 sec ec DC Peak error e Over current error CT2 e Indoor fan lock error BLDC fan model only Sie Ve Outdoor fan lock error 3 sec BLDC fan model only e D Pipe TH is short or open 4 LED Model 46 Room Air Conditioner P
32. e system is stopped by CT cut or heat sink cut off then the cycle returns to the normal condtiond control Outdoor pipe temp O D fan Set speed 28 Room Air Conditioner Part2 Functions amp Controls 5 13 Oil return control 30kBtu h Model 5 13 1 Operating Contion 1 When the continuous running time is over 3hr option oil returning operation is made for 3min In case of the initial operation oil returning operation is made after completing initial operation 2 After defrost and oil returning operation the continuous running time is resetted 5 13 2 Operation Process 1 EEV Full open Hot gas bypass valve On 2 3 4 Outdoor Fan Low step Compressor Step 70Hz Constant Comp On Option Reversing valve Off Process of Off On follows defrost operating 5 14 Oil equalizing control 30kBtu h Model Operating condition 1 When the continuous inverter compressor running time at under 40 Hz option is over 2 hours option in 2 com pressor system oil restoring operation is made 2 If compressor operating Hz is below 40 Hz by the safety control the accumulated time will be cleared and oil restoration is not made 3 During this operation if operating Hz couldn t be changed by safety control stop this operation Operating process Raise the operating HZ up to 70 and after 20 sec option recover to the last value Service Manual 29 i Part3 Test Run 1 Check before Test R H 41 kaema aa A EE
33. ected and the set ting temp is automatically set according to the intake air temperature Intake air Temp Setting Temp 26 C 78 8 F lt intake air temp 25 C 77 F 24 C 75 2 F lt intake air temp lt 26 C 78 8 F intake air temp 1 C 2 F 22 C 71 6 F lt intake air temp lt 24 C 75 2 F intake air temp 0 5 C 1 F 18 C 64 4 F lt intake air temp lt 22 C 71 6 F intake air temp intake air temp lt 18 C 64 4 F 18 C 64 4 F e When intake air temp is 1 C 2 F above the setting temp condition of compressor is same as in cooling mode operation e When intake air temperature reaches 1 C 2 F below the setting temp compressor operates in step1 step3 and the indoor fan speed again operates at low speed or comes to a stop 2 4 Automatic operation e When the Auto operation is set by the remote controller the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature and operation mode e The air volume is automatically set according to the intake air temperature 2 5 Auto changeover operation e The air conditioner changes the operation mode automatically to keep indoor temperature steady e When room temperature vary over 2 C 4 F with respect to setting temperature air conditioner keeps the room tem perature in 2 C 4 F with respect to setting temperature by changing the mode from cooling to heating
34. ed 6 Check the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange EVA Q When displaying Error code refer to the trouble shooting guide Q Check the main power source AC 208V 230V Check the trouble shooting guide error code 21 26 Check that CN_FAN A B supplied voltage to outdoor PCB is about AC 208V 230V Q Turn off main power Q Check the electrical wiring diagram of Outdoor side Check the open or short of connecting wires between Indoor and Outdoor 44 Room Air Conditioner Trouble 5 When indoor Fan does not operate 9 30kBtu h Model Part 4 Trouble Shooting Turn off main power Q Check the connection of CN FAN J Check the Fan Motor Check the Fuse AC250V T2A Q Check the related circuit of indoor Fan Motor e Check the related pattern e Check the SSR e The pin No 68 of micom and the part for driving SSR Q01M SSR Open Indoor Fan Motor never operate SSR short Indoor Fan Motor always operates in case of ON or OFF J Turn on the main power J 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 About AC 160V over SSR is not damage
35. ents 3 Check the compressor same with CH21 IGBT R04S NF1 BD025 62 Room Air Conditioner Part 4 Trouble Shooting 8 Troubleshooting CH32 CH33 CH40 SE Title Cause of error Check point amp Normal condition D pipe Inverter e Check the discharge pipe sensor for INV 32 temp high Discharge sensor e Check the install condition for over load 105 C 221 F Inverter temp high e Check the leakage of refrigerant d e Check the SVC V V open e Check the discharge pipe sensor for Cons D D REESEN Discharge sensor e Check the install condition for over load gt i 05 C 221 F 1 Cons temp high e Check the leakage of refrigerant e Check the SVC V V open e Open Short 40 CT Sensor e Soldered poorly e Normal resistor about 00 e Internal circuit error D Pipe temp Toff 105 C 221 F T2 95 C 203 C T1 90 C 194 C Check Point e CH 32 CH 33 1 Check the install condition for over load 1 Check the install condition for over load 2 Check the SVC V V open 2 Check the SVC V V open 3 Check the leakage of refrigerant 3 Check the leakage of refrigerant 4 Check the constant compressor same with CH21 e CH 40 1 If the resistance of the sensor is only oo the check Is possible 2 If the error occurs again after the reset change the PCB Service Manual 63 Part 4 Trouble Shooting 9 Troubleshooting CH41 CH44 CH45 CH46 CH47 CH65
36. essor ON EEV on time control b T2 lt discharge pipe temperature lt Toff Hysteresis control Expansion valve up by Bpulse every 1 min If EEV is in the starting control it will follow it as it is c Discharge pipe 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 Error Code 33 Toff 105 C 221 F D Pipe temp T2 95 C 203 F T1 90 C 194 F Expansion valve control control Service Manual 27 Part2 Functions amp Controls 5 12 Low Ambient control 5 12 1 9 12KBtu h Model e H outdoor temperature drops below certain temperature liquid back is prevented by reducing fan speed It can prevent frosting of evaporator and keep cooling operation e No matter even if the outdoor temperature reaches 10 C 14 F You can Cool your room at your desired temperature all year around Outdoor temp 10 C 14 F Comp Freq Cond temp Outdoor fan a Fe NEEN Outdoor pipe temp Outdoor fan On Off control 0 C outdoor fan On Off SE control IV fe D on mnn 100 150 Time Min 5 12 2 18 24 30kBtu h Model Low ambient cooling case In this situation outdoor fan works in ON OFF control If the pipe temperature 0 C 32 F and it is falling rapidly in that case compressor will run for 5 min 8 then it will go in low ambient control Temp value can be different for each model After th
37. etely 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 perform ventilation If the refrigerant gas comes in contact with a fire poisonous gas generates A case of leakage of the refrigerant and the closed room full with gas is dangerous because a short age of oxygen occurs Be sure to perform 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 resulting 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 4 Room Air Conditioner Part 1 General Information Do not use a defective or underrated circuit breaker Use the correctly rated breaker and fuse Otherwise there is a risk of fire or electric shock Install the panel and the cover of control box securely Otherwise there is risk of fire or electric shock due to dust water etc Indoor outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no force pulling the cable from the connection terminals Improper or loose connections can cause heat generation or fire GO 9 gt D Do not touch o
38. http biz lgservice com Room Air Conditioner MODEL General Wall Mounted Inverter Type CAUTION Before Servicing the unit read the safety precautions in this SVC manual Only for authorized service personnel Air Conditioner Service Manual CONTENTS Part1 General Information 1 Safety Precautions E 4 2 dw Et EE 7 Part 2 Functions amp Controls 1 List Of Functions amp Controls uuauuuvavnansnuduosmnsdksedonanvmm binner 9 2 Basic Mode Controls cast ar a vaaata ika aka a tia ku adu a atakki MU 10 3 Special Mode Controls EE 12 A Utility FUNCHONS M AT 13 5 Protection Functions amp ControlS rarssvruunsvrnnnvnnunnvnnnnnvnnnnvnnnnnnvnnnnnvnnnnnnnunnennnnnevunneer 16 Part 3 Test Run 1 Check before Test Run 545442 KEEN ccc cedsaveds dana ceicccadeedacdeadaedenctecevdacaccdva edd 31 2 Test RUN Elew charteene ereiestu gt item kaani EE AE Se dea coe Tee e dreiende 32 9 Test Run Detail user aeveedast eddik Madala vaala vaevad a kuta matka a dk JA 33 Part 4 Trouble Shooting Guide US E E EVA IC 35 2 PUMPING DOWN arabere 36 3 Evacuation All amount of refrigerant leaked rrnnvrnnnvnnnvrnnvnnnnvnnnvnnnnvnnnnennnvnnenennnn 37 4 Gas Charging After Evacuation rrnvnnnnvnnnvnnnnvnnnnnnnnvnnnnvnnnnnnnvnnnnvnnnnnnnnennnnnnnnnnnnnennen 38 5 Cycle Troubleshooting Guide uamreeimeremnasisisrmenirisesenrivsenavesnnddevnnnsdetnkannadesanndndadr e 39 6 Electric Parts Troubleshooting Guide m
39. ined at a temperature of 30 C 86 F e When the sleep timer mode is input during the Jet Heat mode operation the Jet Heat mode has the priority e When the Jet Heat button is pressed the upper lower vane of the unit is the unit reset to those of the initial Jet heating mode and then operates so that the air outflow could reach under flow 3 3 Energy saving operation in cooling mode e During cooling and dehumidification mode of operation the Energy saving button can be input In this operation before we feel cold the set temperature and air volume is set automatically to save energy e The operation time and the other thing was decided by experiment 12 Room Air Conditioner Part2 Functions amp Controls VA AA P lt 4 1 Forced operation e To operate the appliance manually 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 f Indoor temp Operating Mode Setting temp ae Ke S over 24 C 75 2 F Cooling 22 C 71 6 F 21 24 C 69 8 75 2 F Healthy Dehumidification 23 C 73 4 F High speed below 21 C 69 8 F Heating 24 C 75 2 F 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
40. le Shooting LEDO1G LED02G Outdoor Contents Red Green Case of error Status CT Circuit open short 4 times D O CT Circuit malfunction D pipe sensor INV open short 4 times 9 1 time OD Open Short Air sensor open short 4 times 9 4 times Open Short Cond Pipe sensor open short 4 times Q 5 times 9 Open Short Suction pipe sensor open short 4 times 6 times Open Short D pipe sensor Cons open short 4 times I 7 times 9 Open Short Over capacity 5 times 9 1 time Over load combination Communication Indoor lt Outdoor 5 times 9 3 times 9 Communication Poorly EEPROM check sum 6 times Q O Check sum mismatching Cond Pipe sensor temp high 6 times 9 1 time Cond Temp high Heat sink sensor temp high 6 times Q 2 times 4 Heat sink temp high Heat sink sensor open short 6 times 9 5 times 9 Open Short 48 Room Air Conditioner Part 4 Trouble Shooting E Troubleshooting Guide 9 12kBtu h Model Description Cause of error e Indoor TH sensor is short or open Indoor TH is short or Indoor TH sensor is not connected to the indoor pcb assembly open Damage or defect on the sensing circuit of indoor pcb assembly RO1H RO2H RO3H RO4H CO1H CO2H Check flow YES YES Indoor TH is connected to Indoor TH is right Sensing circuit of indoor Indoor pcb assembly i SI pcb is right
41. m Air Conditioner Part 4 Trouble Shooting 6 Troubleshooting CH24 CH25 Title Cause of error Check point amp Normal condition 24 Press S W Open e Low High press e Check the connection of CN Press S W open e Check the components e Abnormal Input voltage e Check the power source I ARTE NONDE 140VAC 300VAC TL Check the components TRANS1 50Hz DC12V 5V 4 D02C ROIC A DOIC 1N4148 1K1 4 1N4007 5 MW MA INPUT VOLT ROSC Ka om 1 25VANF kose C02C Aug 02 Check Point e CH 24 CH 25 1 Check the connection of CN PRESS 1 Check the power source 2 Check the install condition for over load 2 Check the components 3 Check the SVC V V open Trans1 B Diode Diode Resistance 4 Check the leakage of refrigerant Service Manual 61 Part 4 Trouble Shooting 7 Troubleshooting CH26 CH27 eng Title Cause of error Check point amp Normal condition e Check the connection of comp wire U V W DC Compressor f SR 26 Sion Compressor Malfunction of compressor position detect error Check the component of IPM detection parts e Check the component of IGBT PSC Fault e af i ver Curent IGE e Check the components Check Point e CH 26 CH 27 1 Check the connection of U V W 1 Check the component of IGBT 2 Check the insulation of IPM part 2 Check the compon
42. ons amp Controls sisiccesciscccassevaadiscdevadwedscuweudsdecdantuncudsuacubalerdecsceuenseuads 16 8 Room Air Conditioner Part2 Functions amp Controls Category Function Description Remark Cooling Mode Cooling operation Heating Mode Heating operation Basic mode TESSA conirols Healthy Dehumidification Dry operation Automatic operation Automatic operation Auto Changeover Cooling mode is automatically changed to heating mode and vice verse Jet Cool Powerful cooling mode Special Mode Jet Heat Powerful heating mode controls Energy saving Air volume amp set temp are automatically selected for saving energy in cooling mode Cooling Mode Only Utility Functions Forced operation Operation without remote controller Auto Clean After cooling operation this function makes the evaporator dry Air volume control Indoor Fan speed Control Natural Air control Air volume control Program Chaos Swing Vertical Airflow Direction control Sleep mode Auto control Air volume amp set temp are automatically changed for com fortable sleep Auto Restart Function When power returns after a power failure Unit restarts in the previous operating mode Protection Controls amp Functions Five Second Delay Fan For noise prevention Two Minutes Stand by Comp For overload prevention Hot Start To prevent cold wind blow on heating mode start
43. or e Too much Refrigerant e Defect in outdoor pcb assembly gt replace pcb assembly DC Peak Error Check flow YES YES Supplied voltage to Is connector CN U V W Outdoor pcb is about connected to compressor and p Refrigerant pressure is right AC 208 230V inserted to pcb in right position Check CN U V W connector U RD V BL W YL Check refrigerant pressure and adjust Check power source YES YES Inverter components in outdoor pcb assembly are Is th ight i s the compressor rig right Check resistance 9K 12K Model Between U V V W U W port Check gt Short Open circuit Short of SPM3 pins GND P U V W pin Comp motor coil error O Direction of D01Z D03Z C08Z 10Z 12Z 16Z gt normal 1 2Q Assembling state of RO1P R21P 8 ICO1P Between U V W and Body Assembling state of screw between INV IC amp normal over 10MQ Heat sink 6 DC 15V output of Power module 52 Room Air Conditioner Part 4 Trouble Shooting Description Cause of error e Supplied power is not normal Over current Error e Indoor outdoor fan is locked CT2 Too much refrigerant e Defect in current sensing circuit in outdoor pcb assembly Check flow YES YES Supplied voltage to A S D t E Outdoor pcb is about Des Indoors Odo A PEI Refrigerant pressure is right AC 208 230V Hore Check indoor outdoor fan and Check refrigerant pressure Check j eck power source
44. p C Heating ON temp Setting temp Heating OFF temp Setting temp 4 0 C 8 F FS 1 2 Sleep time hr 4 7 Auto restart e When the power comes back after a sudden power failure during operation the mode before the power failure is kept on the memory of the appliance and it automatically operates in the saved mode on the memory e Operation mode that is kept on the memory State of operation ON OFF Operation mode setting temp selected airflow speed Sleep timer mode remaining time of sleep timer Chaos Swing Service Manual 15 Part2 Functions amp Controls 5 1 Five Seconds Stand by fan e The indoor unit fan rotates after 5 seconds when unit is turned on 5 2 Two Minutes Stand by comp e Compressor starts two minutes later after it is turned off 5 3 Hot start e When unit starts in the heating mode to prevent cold wind blowing the indoor fan does not rotate until the temp of heat exchanger reaches 30 C 86 F model by model 5 4 Freeze prevention Protection of the evaporator pipe from frosting e If the indoor pipe temperaure is below 0 C 32 F in 7 min after the compressor operates without pause while in cool ing cycle operation mode gt compressor outdoor fan are turned off e When indoor pipe temp is 7 C 44 6 F or higher after 2 min pause of compressor gt compressor outdoor fan is turned on according to the condition of the room temperature Indoor pipe temp
45. perate or repaire the product with wet hands Holding the plug by hand when taking out Otherwise there is risk of electric shock or fire CAUTION Do not turn on the breaker when the front panel and cabinet are removed Be sure to ground 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 while 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 gt oO oe Be sure to turn off power switch before connecting or disconnecting connector or parts damage may be occur Service Manual 5 Part 1 General Information 1 2 Inspections after Repair WARNING Check to see if the power cable plug is not dirty or loose If the plug is dusty 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 mo
46. rnsernnnvnnnnnnnnvnnnnvnnnvnnnvnnnnvnnnennnnvnnnnnnnnennenennne 41 7 Selt Alaghosis Function uuuvvveasussusemn meters net 46 2 Room Air Conditioner g Part1 General Information T Safety PrecaUllons E 4 2 Nomenclature E E AE E EA EE A A A 7 Service Manual 3 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 WARNING This symbol indicates the possibility of death or serious injury CAUTION This symbol indicates the possibility of injury or damage to properties only E Meanings of symbols used in this manual are as shown below Q Be sure not to do Q Be sure to follow the instruction AN Dangerous Voltage 1 1 Cautions in Repair WARNING 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 high voltage is extremely dangerous and may cause death or severe injury if come in contact 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 compl
47. speed Setting Speed 18 Room Air Conditioner Part2 Functions amp Controls e Defrosting Control Algorithm 1 Lowering the compressor frequency when starts the defrosting operation Constant speed compressor is ON after 10 seconds from the arrival time of 30 Hz Option frequency and is speed up its revolution till 100 Hz Option 2 Every EEV have 350 pulse Option of opening when starts defrosting operation 3 Reversing valve is OFF after 5 seconds from arriving the compressor operating frequency of 30 Hz and then fans of indoor units turn OFF including the indoor unit with being OFF except the remote controller is being OFF 4 After 5 seconds from the time arriving 30 Hz fans of outdoor unit turn OFF and Hot Gas bypass Oil separator valve turn ON NOTE Comp frequency and EEV pulse is different each models e Control algorithm of defrost completion 1 Frequency of compressor lowering to 30 Hz and maintain constant speed operation with 30 Hz for 75 seconds and then stating operation If the constant speed compressor is OFF it will be receive OFF signal after 5 sec onds from the arrival time of 30 Hz 2 3 4 5 The EEV will open with the standard previous pulse after 5 seconds from the time of 30 Hz Reversing valve is ON after 15 seconds from the time of 30 Hz of compressor frequency Fan of outdoor unit is ON with high speed and maintain it after 5 seconds from the time of 30Hz wae Iz I 02 Hot Gas bypass valve
48. t pipe sensor psory Normal voltage 2 5VDC at 25 C 77 F plugged Internal circuit error 10kQ 2 5VDC me EE Q V Check the resistance Check the voltage Check Point 1 Unplug the sensor on Indoor unit PCB 2 Estimate the resistance of each sensor 3 If the resistance of the sensor is 10kQ 5kQ at 25 C 77 F then sensor is normal 4 If the resistance of the sensor is 0 ko or ee then sensor is abnormal gt Change the sensor 5 Plug the sensor on Indoor unit PCB and Power ON 6 Estimate the voltage of each sensor 7 If the voltage of the sensor is 2 5VDC at 25 C 77 F then sensor is normal 8 If the resistance of the sensor is 0 or 5VDC then sensor is abnormal gt Repair or Change the PCB 56 Room Air Conditioner Part 4 Trouble Shooting 2 Troubleshooting CH05 CH53 SE Title Cause of error Check point amp Normal condition e Power input AC 208 230V Outdoor Indoor 05 e The connector for transmission is disconnected Ver e The connecting wires are misconnected ker e Communication poorly The GND1 2 is not connected at main GND 53 The communication line is shorted at GND e Transmission circuit of outdoor PCB is abnormal e Transmission circuit of indoor PCB is abnormal Check Point 1 Check the input power AC 208 230V Outdoor Indoor unit 2 Check the communication wires are correctly connected RY C COMP Adjust the connection of wire gt
49. the operating frequency by 1step if operating current is below 11 for 60 seconds continuously the operating frequency of compressor increases by 1step 2 CT2 control e If the operating current of the appliance reaches 12 the compressor stop instantly and two minutes later the compres sor restarts again e lf CT2 occurs 5 times within one hour the appliance turn off and displays ERROR CODE 7 I1 Current of operating frequency down 5 5A 12 0A I2 Current of compressor cut off 9 0A 14 0A 11 I2 depends on model Service Manual 23 Part 2 Functions amp Controls 5 9 2 18 24 30kBtu h Model 1 Detection check the output DC voltage of Current Transformer CT 2 Current Transformer Sensing Error a In initial power input if the CT output is over 4 0V 25A it shows Error Code 40 defect in CT sensing 3 CT 1 detection a If total current exceeds CT1 value reduce 1 step of operating Hz Step down 10Hz from current step If new Hz is below cooling Fc min heating Fh min then turn off the compressor b After step down H the total current exceed 1 for more than 5 sec then step down 1 more step c If the current continue below 1 for more than 1 min return the Hz to setting Hz 4 CT 2 detection a If total current exceeds CT2 turn off compressor And after 3 min turn on the compressor and check the current again b If CT2 occurs 5 times in 1 hour stop the operation and shows
50. ving parts that could cause personal injury OO 0 9 Do not block the inlet or outlet of air flow It may cause product failure CAUTION Check to see if the parts are mounted correctly and wires are connected Improper installation and connections can cause an electric shock or an injury Check whether the installation platform or frame has corroded Corroded installa tion platform or frame can cause the unit to fall resulting in injury Be sure to check whether the earth wire is correctly connected After the work has finished be sure to do an insulation test to check whether the resistance 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 GG e e Check the drainage of the indoor unit after the repair If drainage is faulty the water may enter the room and wet floor 6 Room Air Conditioner Part 1 General Information A S W 1 2 6 4 G G 1 1 2 3 4 5 6 7 8 9 10 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
51. w 1 0 C 2 F of the temperature of setting temp Compressors two minutes time delay After compressor off the compressor can restart minimum 2 minutes later 2 2 Heating Mode Thermo OFF T2 C T4 F Thermo ON T1 C T2 F Setting Temp INV Comp Frequency High gt Low Comp OFF High lt Low Comp OFF e Operating frequency of compressor depend on the load condition The difference between the room temp and set temp frequency restrictions e H 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 T2 C T4 F above the setting temperature e Condition of compressor turned on When intake air temperature reaches T1 C T2 F above the setting temperature Condition of indoor fan turned off While in compressor on indoor pipe temp lt 20 C 68 F While in compressor off indoor pipe temp lt 30 C 86 F e While in defrost control the indoor and outdoor fans are turned off e Compressor 2minutes delay After compressor off the compressor can restart minimum 2 minutes later e T1 and T2 may be changed by models 10 Room Air Conditioner Part2 Functions amp Controls 2 3 Healthy Dehumidification operation e When the dehumidification operation is set by the remote controller the intake air temperature is det
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