Home

Room Air Conditioner SVC MANUAL(General)

1. 12 CH61 Cond Pipe Overheat Error Error Code Error Detection Cause of Error Check Point Overload operation Outdoor fan constraint screened blocked Outdoor unit heat exchanger High temperature in contaminated outdoor Cond Pipe EEV connector displaced poor EEV assembly Poor Cond Pipe sensor assembly burned CH61 Check outdoor fan constraint screened flow structure Check if refrigerant overcharged Check the status of EEV assembly Check the status of sensor assembly burn Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking Remove blockings around heat exchanger e Maintain distance between outdoor unit and the wall Check pipe folding and abnormality Check SVC valve lock Is the unit properly installed Yes Remedy remove cause of error Is the refrigerant properly charged Check if refrigerant is overcharged Remedy adjust refrigerant volume Is the EEV properly Check the status of PCB CN EEV1 assembled assembly Check the status of EEV assembly R EEV ble repl L Ves emedy reassemble replacemen Check the sensor assembly status Check if the sensor is burned measure resistance gt
2. Burned PCB phase Check for PCB phase current sensor part current sensor part Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting PCB phase current sensing circuit Check fan locking 1 Set Multi tester as DC voltage measurement Remove blockings around heat mode Is the unit properly Na ce heinean 2 Measure at the below measuring point DC A 7 S installed outdoor unit and the wall voltages at Power on standby state Check pipe folding and 3 If the measurements are outside DC 2 5V abnormality 0 2V the parts are decided as burned Check service valve lock Yes Remedy remove cause of error Comp current GND ma ee Check compressor locking ANA a Er 4 Check compressor wire na D KL Is the compressor normal disconnection open negative 2 i phase PENT nG 8 Check inside insulation damage 238 IN mi E Zort Ca Remedy Rearrange compressor wire disconnections Replace compressor Yes Check phase current sensing part E voltage measurements at Power on standby state U V W gt DC 25V 0 2V E gt e a phase current sensing circuit part normal Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc Al
3. When intake air temperature reaches 4 C F above the setting temperature e Condition of compressor turned on When intake air temperature reaches below 2 C 3 6 F of above the setting temperature Condition of indoor fan turned off e While in defrost control the indoor and outdoor fans are turned off e Compressor 3 minut delay After compressor off the compressor can restart minimum 3 minute later Copyright 2009 LG Electronics Inc All right reserved 10 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 2 3 Healthy Dehumidification operation e When the dehumidification operation is set by the remote controller the intake air temperature is detected 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
4. 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 o gt Copyright 2009 LG Electronics Inc All right reserved 4 Only for training and service purposes LGE Internal Use Only 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 gen
5. F Current less than 8096 of rated current Temp Difference Temp difference approx 8 C 16 F Current less than 8096 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 All amount of refrigerant leaked out Check refrigeration cycle 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 Copyright 2009 LG Electronics Inc All right reserved 25 Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting 6 Electror 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 gt Check the voltage of power AC 208 230V 60Hz e Primarily the operating condi tion of Micom is O K e The voltage of main power e The voltage applied to the unit TIL e The connecting method of Indoor Outdoor co
6. Indication S Description Indoor Unit Outdoor Unit LED1 LED2 LED1 LED2 Red Green 1 Indoor Sensor Air open short 1 Time 2 Indoor Sensor Entry Pipe open short 2 Times 5 Communication Failure Indoor Unit gt Outdoor Unit 5 Times 6 Indoor Sensor Exit Pipe open short 6 Times 9 EEPROM ERROR Indoor Unit 9 Times 10 Indoor Unit Fan Lock Operation Failure 1 Time 12 Indoor Sensor Middle Pipe open short 2 Times 1 Time 1 SB SC Chassis 2 S4 S5 Chassis 4 LED Model Cooling LED1 1 Digit O O O O Heating LED2 C 10 Digit LED1 LED2 Plasma 10 Dig 1 Digit 10 Digit pa 3 SH Chassis 1 Digit 10 Digit 2 SE Mirror S8 SD Chassis Ex Error Code 5 Communication Failure DH HD BH Copyright 2009 LG Electronics Inc All right reserved 30 Only for training and service purposes LGE nemal Use Only E Outdoor Unit Error 1 2 LED Type LED1 Green 1 Digit LED2 Red 10 Digit 2 1 LED Type apang nga co THI Red LED Part4 Trouble Shooting Ex Error Code 21 DC Peak Error Indication dl Description Indoor Unit Outdoor Unit LED1 LED2 LED1 LED2 21 DC Peak IPM Fault 2 Times 1 Time 2 Times 1 Time 22 CT 2 Max CT 2 Times 2 Times 2 Times 2 Times 23 DC Link Low Volt 2 Times 3 Times 2 Times 3 Times 25 Low wire volt high wire volt 2 Times 5 Times 2 Times 5 Ti
7. Inspecting PCB DC Link voltage sensing circuit 1 Set Multi tester as DC voltage measurement mode 2 Measure the measuring point DC voltages at Power on standby state 3 If the measurements are outside DC 2 4 2 8V the parts are decided as burned LGE Internal Use Only 4 CH26 DC Comp Location Sensing Error Error Code Error Detection Cause of Error Check Point Compressor Locking Overload operation Check compressor locking Over current at the a me i Outdoor fan constraint Compressor wire open short initial operation of the compressor location screened blocked Check compressor insulation damage CH26 Kasa Burned parts inside Check outdoor fan constraint screened flow sensing signal for compressor operation EE truci e not in p Burned PCB phase Check if IMP burned refer to CH21 p current sensing circuit Check on PCB current sensing circuit parts parts Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking Inspecting PCB phase current sensing Remove blockings around heat circuit exchanger 1 Set Multi tester as DC voltage measurement Is the unit properly Maintain distance between outdoor mode installed unit and the wall 2 Measure t
8. Jet cool button is pressed the horizontal 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 Auto Changeover 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 maintained 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 horizontal 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 e In this operation before we feel cold the set temperature and air volume is set automatically to save energy Copyright 2009 LG Electronics Inc All right reserved 212 Only for training and service purposes LGE Intemal Use Only Part 2 Functions 8 Controls 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
9. Motor normal middle connection connectors Check if Fan motor is burned gt measure voltage between Motor connector pins Remedy replace Fan motor Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 63 Only for training and service purposes LGE Internal Use Only P NO MFL41161605 NOVEMBER 2009
10. Ss normal _A4 state DC OV 0 2V DC voltage measurement Is the Comp at the measurement point in lt phase Current sensor gt figure 2 at power on Input Cur part normal 7 standby state gt measured rent DNS value within 2 5V 0 2V Fig 1 Comp curr GA Ki Leg Bos E a gr Copyright 2009 LG Electronics Inc All right reserved 57 Only for training and service purposes LGE Internal Use Only 8 CH41 44 45 65 Inv D Pipe Outdoor Inlet Cond Pipe Heat sink Sensor Error Error Code Error Detection Cause of Error Check Point Inv D Pipe sensor CH41 open short l CH44 Outdoor Inlet sensor Sensor displacement poor open short assembly Check the status of sensor assembly CH45 Cond Pipe sensor Sensor burned disconnection Check if sensor is burned open short insulation damage B Diode Heat sink sensor CH65 open short Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting Inverter Compressor Discharge Check the status of the PCB connector Sensor Is the sensor propery assembly 1 Set Multi tester as resistance measurement assembled Check the status of the sensor assembly mode 2 Measure resistance between the sensor connect
11. 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 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 Copyright 2009 LG Electronics Inc All right reserved 24 Only for training and service purposes LGE Intemal Use Only Trouble analysis Part 4 Trouble Shooting 1 Check temperature difference between intake and discharge air and operating current Temp difference approx 0 C 1
12. remote controller L Low e SL step is selected in Sleep Mode operation ML Medium Low M Medium 4 4 Natural Air Control Natural Wind Bi Medium High e When the Auto Step is selected and then operated the high medi 3 High um or low speed of the airflow mode is operated for 2 15 sec ran SH Super High domly by the Chaos Simulation Auto Natural Wind 4 5 Auto Swing e By the Auto swing key input the horizontal vane automatically operates with the Auto swing or it is fixed to the desired direction 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 NOTE Some Models are different by swing width and swing pattern Copyright 2009 LG Electronics Inc All right reserved 14 Only for training and service purposes LGE Intemal Use Only Part 2 Functions 8 Controls 4 6 2 Sleep timer operation for heating cycle e While in hea
13. 009 LG Electronics Inc All right reserved 52 Only for training and service purposes LGE Internal Use Only 3 CH23 DC Link Low Voltage Error Inspection Error Detection Cause of Error Check Point Number DC Link voltage is lower mputvoltage Smordow GC voltage Check input voltage SKS Hatin ia Ngee Burned parts inside Check PCB DC Link voltage sensor parts 140Vrms PCB Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting PCB DC Link voltage sensing a j i is circuit EEN voltage ef SE l 1 Set Multi tester as DC voltage measurement mode 2 Measure the measuring point DC voltages at Remedy inspect repair power Power on standby state board 3 If the measurements are outside DC 2 4 2 8V the parts are decided as burned normal _ Yes Measure DC Link voltage at Is the PCB Power gt Power on standby state part normal ef DC 280 310V Remedy replace PCB Assembly If measurement of DC Link voltage at Power on standby state is DC 280 310V and DC Link sensed voltage DC 2 4 2 8V PCB DC Link voltage IN sensor part normal 7 Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc All right res
14. 5KQ 10 25 C basis Is the Cond Pipe sensor normal Copyright 2009 LG Electronics Inc All right reserved 47 Only for training and service purposes Inspecting Cond Pipe Sensor 1 Set Multi tester as resistance measurement mode 2 Measure the resistance between rated speed Comp Discharge sensor connector pins 3 Measure resistance value of 5kQ 10 25 C basis 4 Check if the sensor insulation is damaged gt measure the resistance between sensor connector pin and unit assembly pipe 1MQ or more Sensor Connector Tester LGE Internal Use Only 13 CH62 Heat Sink Overheat Error Error Code Error Detection Cause of Error Check Point Overload operation Outdoor fan Check outdoor fan constraint screened flow High temperature in constraint screened blocked structure CH62 outdoor PCB Heat Poor PCB Heat Sink assembly Check for the status of the PCB Heat sink Sink Poor PCB temperature sensing circuit connection parts Check PCB temperature sensing parts Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking Inspecting PCB PSC PFC Module Remove blockings around heat temperature sensing part Is the unit exchang
15. B PCB 1 Check if the OPTION PCB is properly connected Copyright 2009 LG Electronics Inc All right reserved 33 Only for training and service purposes LGE Internal Use Only Inspection Number Description of Inspection Cause of Error CH10 Inspection Number CH10 Copyright 2009 LG Electronics Inc All right reserved Indoor Fan Locking faulty Motor operation If the Fan motor does not operate after 1 minute of Structural locking of Fan e Poor connection of the motor connector Faulty motor Type of Fault check procedure 1 Indoor Fan structurally Locking Iw initial operation Cause of Error Fan is locked by the interference of other structures Verification Turn the fan by hand and checking locking materials Faulty indoor unit PCB Assembly Remedies Release lock by reassembling etc 2 Poor connection of motor connector y 3 Faulty motor Y 4 Faulty indoor unit PCB Only for training and service purposes 1 motor connector displaced 2 Housing terminal displaced 3 Wire disconnection or pressed Motor inner PCB etc burned 34 Verify with eyes Verify with eyes e Verify with eyes e Repair Repair or replace motor Replace motor Replace indoor unit PCB LGE Internal Use Only E Trouble Shooting Guide Outdoor Unit 2 LED Type 1 CH21 DC Peak Error EH
16. C Fan Lock Error Error Code Error Detection Cause of Error Check Point Outdoor BLDC Fan Lock The outdoor unit PCB Fan connector displaced BLDC Fan operation BLDC Fan motor burned wire F Back signal does disconnected not come on PCB BLDC Fan operation circuit burned Check for the status of outdoor fan assembly Check for the status of the PCB Fan connector assembly e Check Fan motor wire disconnection e Check if Fan motor burned CH67 Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check the status of fan locking out of Inspecting Outdoor BLDC Fan Motor burn lace 1 Set Multi tester as Diode voltage e ee S Check operational difficulties by measurement mode foreign subjects 2 Measure voltage between Fan motor Remedy remove cause of error connector pin 1 and pin 4 at power off state 3 Measured voltage value of 1V 0 2V means the motor is internally burned Is the PCB Check the status of PCB Fan fan connector assembled connector assembly CN MOTOR1 4 properly MOTOR2 FAN MOTOR CONNETOR m ooo00000 Remedy reassemble the connector Tester Check the status of Fan motor wire disconnection Check the status of the Fan motor Is the Fan
17. Check outdoor fan constraint screened flow High temperature in constraint screened blocked structure CH62 outdoor PCB Heat Poor PCB Heat Sink assembly Check for the status of the PCB Heat sink Sink e Poor PCB temperature sensing circuit connection parts Check PCB temperature sensing parts Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts In ing PCB temperature sensin Check fan locking specting PCB temperature sensing Remove blockings around heat part Is the unit exchanger 1 Set Multi tester as resistance properly installed Maintain distance between measurement mode outdoor unit and the wall 2 Measure resistance between Heatsink Check pipe folding and temperature sensor pin abnormality 3 Measured resistance value of 10KN 5 Check service valve lock 25 C basis Yes Remedy remove cause of error Are the PCB Measure resistance between temperature sensing PCB temperature sensor pin parts normal gt 10KQ 5 25 C basis Remedy reassemble the screw Heatsink temperature s ensor CN Heatsink White 2Pin Connector Copyright 2009 LG Electronics Inc All right reserved 62 Only for training and service purposes LGE Internal Use Only 13 CH67 Outdoor BLD
18. Electronics Inc All right reserved 32 Only for training and service purposes LGE Internal Use Only Inspection N Description of Inspection Cause of Error Check Point umber AC 220V power input indoor outdoor unit Disconnection of the transmission connection Poor connection of connecting wires Communication line short in GND No power to outdoor unit PCB burned faulty communication circuit faulty outdoor unit PCB communication circuit GND 1 2 not connected to the main power GND The communication between indoor lt gt outdoor unit is stopped for more than 3 minutes Poor Communication CHO5 Indoor lt gt Outdoor unit 1 Check input power AC 220V indoor outdoor unit Check proper connection of the communication line gt check the status of the connection wire fault and connector connections Check the resistance between the communication line and GND normal 2kQ or more Check if the communication connections are properly connected Check indoor unit GND outdoor unit GND and main GND connections If the length of the communication line exceeds 50M separate the communication lines Check for the products or power lines near the communication line that may cause noise N Na AB WO Inspection d 3 F Number Description of Inspection Cause of Error Check Point Poor connection of Check the connection status of the OPTION CH09 CN OPTION PCB OPTION PC
19. Error Detection Cause of Error Check Point Number Compressor block Ce pressor T9 pd Check compressor constraint e Disconnection short eege Check compressor wire open short i circuit inside compressor E High current into the Check compressor insulation damage CH21 e Over load operation f compressor Check outdoor fan constraint screened flow Outdoor fan constraint screened blocked Structure Burned parts inside PCB Chea I IPM BUMEN Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check Fan constraint Check for short circuit of PCB IPM Remove blockings around heat exchanger Input Signal Connector Is the unit installed Maintain distance between outdoor unit 1 Set as the multi tester resistance properly and the wall measurement mode E ee SEN 2 Check the short circuit between the input signal pins at the IPM SPM3 Yes Remedy remove the cause of error lower parts in Power off state AK Check compressor constraint Check compressor wire disconnection Is the Compressor open negative phase Normal Check inside wire open short Check inside insulation damage EC Aa ES Y Remedy Rearrange compressor wire es disconnections Replace compressor e Check PCB compr
20. Supply refrigerant if not enough connector pin and unit assembly pipe 1MQ refrigerant refrigerant or more Yes Remedy Treat the leakage point Supply additional refrigerant CN TH2 Yellow 3Pin Connector Check the status of PCB CN EEV1 assembly Is the EEV properly Check the status of EEV assembly assembled Check PCB IPM input signal connectors short circuit gt Refer to CH21 trouble shooting method Remedy LEV assembly replacement Yes Ccheck the sensor assembly status Check if the sensor is burned measure resistance gt 200KQ 10 25 C basis Is the inverter compressor sensor normal Copyright 2009 LG Electronics Inc All right reserved 56 Only for training and service purposes LGE Internal Use Only 7 CH40 CT Sensor Error Open Short Error Code Error Detection Cause of Error Check Point AC Input current Comp phase current PCB sensing circuit part Check power input connector Comp output sensing circuit basic burned current sensing circui voltage sensing error CH40 Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts i Check voltage measurement Is AC input on the input current Fig 1 current sensing part a at the power on standby
21. ang 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 gt 9 000 Btu h 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 6 Electric Range 7 Chassis A Z Name of Chassis 8 Look A Z Look Color Artcool Model 9 Function A Z Basic Basic 4Way Basic Filter Carbon filter Plasma A changeove A clean 2Way lon Plasma A changeove A clean 4way lon Lamp Plasma A changeove A clean Low A Plasma A changeove A clean 4way Low A Plasma A changeove A clean Plasma A changeove A clean 4way Plasma A changeove A clean PTC Plasma A changeove Autoclean 4way PTC Plasma A changeove A clean 4way Low A PTC Smart Robot Cleaning Eco eye Plasma Allergy Filter 4way Plasma Allergy Filter 4way Allergy Filter 4way Allergy Filter 2way Basic Low Ambient Basic A clean 4way Low A Nix Z lt col O UZ Z lt TITONMOonn gt 10 Serial No 1 9 LG Model Development Serial No Copyright 2009 LG Electronics Inc All right reserved 7 Only for training and service purposes LGE Internal Use Only WM Part2 Functions 4 Controls 1 L
22. asuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check the status of fan locking out ot Inspecting Outdoor BLDC Fan Motor burn lace 1 Set Multi tester as Diode voltage e M pany Check operational difficulties by measurement mode foreign subjects 2 Measure voltage between Fan motor Remedy remove cause of error connector pin 1 and pin 4 at power off state Yes 3 Measured voltage value of 1V 0 2V means the motor is internally burned Is the PCB Check the status of PCB Fan fan connector assembled connector assembly CN MOTOR1 amp properly MOTOR2 FAN MOTOR CONNETOR Remedy reassemble the connector Tester Check the status of Fan motor wire disconnection Check the status of the Fan motor Is the Fan Motor normal middle connection connectors Check if Fan motor is burned gt measure voltage between Motor connector pins Yes Remedy replace Fan motor Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 49 Only for training and service purposes LGE Intemal Use Only E Trouble Shooting Guide Outdoor Unit 1 LED Type 1 CH21 DC Peak Error Inspection Number Error Detection Cause of Error Check Point Compressor blocked Disconnection short circuit inside compressor Over load operation Outdoor fan constraint screened block
23. ctronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Part 2 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 gt Low Comp OFF High lt 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 90 seconds not emergency conditions e Compressor turned off when Intake air temperature reaches below 0 5 C 1 F of the setting temperature for three minute continuously Intake air temperature reaches below 1 5 C 3 F of the setting temperature e Compressors 3 minute time delay After compressor off the compressor can restart minimum 3 minute later 2 2 Heating Mode 4 C F Thermo OFF 2 C 3 6 F Thermo ON Setting INV Comp Frequency High lt Low Comp OFF High gt 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 If compressor operates at some frequency the operating frequency of compressor cannot be changed within 90 sec onds e Condition of compressor turned off
24. ection Cause of Error Check Point Number Input voltage error low voltage Check input voltage AC Input current is higher Over load operation Check outdoor fan constraint screened flow CH22 NAG than the limit Outdoor fan constraint structure screened blocked Check PCB current sensor parts Burned parts inside PCB Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting PCB input current sensing circuit 1 Set Multi tester as DC voltage measurement mode 2 Measure the measuring point DC voltages at Power on standby state Remedy inspect repair power 3 If the measurements are outside DC 2 5V 0 2V the Yes board parts are decided as burned No Check if the input voltage is i within AC 190 260 V Is the input voltage gt normal w7 Check Fan constraint indoor outdoor unit Remove blockings around heat exchanger Maintain distance between outdoor unit and the wall Check overcharge refrigerant leakage Check service valve lock Yes Check pipe folding Is the unit installed ry properly 7 Check voltage measurement on the input current at the power on standby state DC OV 0 2V Remedy replace PCB Assembly Input Current Copyright 2
25. ectronics Inc All right reserved 18 Only for training and service purposes LGE Internal Use Only 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 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 cm G 120 135 P S I G Copyright 2009 LG Electronics Inc All right reserved Only for training and service purpos
26. ed Burned parts inside PCB Check compressor constraint Check compressor wire open short Check compressor insulation damage Check outdoor fan constraint screened flow structure Check if IPM burned High current into the compressor Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check Fan constraint e Check for short circuit of PCB IPM Remove blockings around heat exchanger Input Signal Connector Is the unit installed Maintain distance between outdoor unit 1 Set as the multi tester resistance properly and the wall i measurement mode Check pipe folding and abnormality 2 Check the short circuit between the Gieck serice valve lack input signal pins at the IPM SPM3 Yes Remedy remove the cause of error lower parts in Power off state Check compressor constraint Check compressor wire disconnection Is the Compressor open negative phase Normal e Check inside wire open short Check inside insulation damage Y Remedy Rearrange compressor wire es l disconnections Replace compressor Check PCB compressor connector assembly status Check if PCB IPM burned Check IPM input signal connector short circuit Check the balance of current in the compressor operation phase
27. er 1 Set Multi tester as resistance properly installed Maintain distance between measurement mode outdoor unit and the wall 2 Measure resistance between PSC PFC Check pipe folding and Module pins 19 20 at power off state abnormality i a Check can bb daa bok 3 Measured resistance value of 7K0 10 25 C basis Yes Remedy remove cause of error Is the PCB Check the connection between Heat Sink connected PCB Heat Sink and the PSC PFC properly Module Screw Remedy reassemble the screw Are the PCB temperature sensing parts normal Measure resistance between PCB PSC PFC Module 19pin and 20pin gt 7KQ 10 25 C basis Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 48 Only for training and service purposes LGE Intemal Use Only 14 CH67 Outdoor BLDC Fan Lock Error Error Code Error Detection Cause of Error Check Point Outdoor BLDC Fan Lock The outdoor unit PCB Fan connector displaced BLDC Fan operation BLDC Fan motor burned wire F Back signal does disconnected not come on PCB BLDC Fan operation circuit burned Check for the status of outdoor fan assembly Check for the status of the PCB Fan connector assembly Check Fan motor wire disconnection Check if Fan motor burned CH67 Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When me
28. eration or fire Do not touch operate or repaire the product with wet hands Holding the plug by hand when taking out Otherwise there is risk of electric shock or fire OSO DB 44CAUTION 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 Be sure to turn off power switch before connecting or disconnecting connector or parts damage may be occur gt oO oe Copyright 2009 LG Electronics Inc All right reserved 5 Only for training and service purposes LGE Internal Use Only Part 1 General Information 1 2 Inspections after Repair A 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 exces
29. erved 53 Only for training and service purposes LGE Internal Use Only 4 CH26 DC Comp Location Sensing Error Error Code Error Detection Cause of Error Check Point CH26 Over current at the initial operation of the compressor location sensing signal for compressor operation is not input Compressor Locking Overload operation Outdoor fan constraint screened blocked Burned parts inside PCB IPM Burned PCB phase current sensing circuit parts Check compressor locking Compressor wire open short Check compressor insulation damage Check outdoor fan constraint screened flow structure Check if IMP burned refer to CH21 Check on PCB current sensing circuit parts Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Is the unit properly installed Yes Is the compressor normal Yes Is the outdoor unit PCB IPM normal Yes Is PCB phase current sensing circuit part normal Check fan locking Remove blockings around heat exchanger Maintain distance between outdoor unit and the wall Check pipe folding and abnormality Check service valve lock Remedy remove cause of error Check compressor
30. es Part3 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 IW Open the gas side service valve halfway and purge the air from the manifold hose using the refrigerant gas oo Close the liquid side service valve all the way in gt Turn on the unit s operating switch and start the cooling operation al When the low pressure gauge reading becomes 1 to 0 5kg cm G 14 2 to 7 1 P S I 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 Qi Check operating current O Change operation mode and check 19 LGE Internal Use Only Part 4 Trouble Shooting P Part 4 Trouble Shooting 12 Way EVA IC EA 2 FUMPNO DON Ma da 22 3 Evacuati
31. essor connector assembly status Check if PCB IPM burned Check IPM input signal connector short circuit Check the balance of current in the compressor operation phase gt the difference between each phase current should be within 2A Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 35 Only for training and service purposes LGE Internal Use Only Verifying compressor burn Table 1 oe 1 Remove the connectors to the PCB Resistance between the 2 Measure the resistance between the lines Ines of cach terminal of each terminal of the compressor Refer V W 05 10 to Table 1 W U 0 5 10 3 Measure the resistance between each terminal and the chassis pipe of the Table 1 compressor Refer to Table 2 Ha al terminal 4 If the measurements are distinctively U chassis a MO 1 different from Table 1 and 2 the V chassis IMO compressor is decided to be burned W chassis 1MO 1 1 Remove the connectors to the PCB 2 Set Multi tester as Diode voltage measurement mode 3 Measure voltages of P U P V P W as shown in figure 1 below 4 Measure voltages of U Nu V Nu W Nu as shown in figure 2 below 5 If the measurements are distinctively different as in the figures the IPM is decided to be burned P U V W Nu Nv Nw E CALI O 27 26 25 24 23 22 21 Copyright 2009 LG Electronics Inc All r
32. f the sensor insulation is damaged gt Ay TAR leakage measure the resistance between sensor Is there enough Supply SE if nor enol connector pin and unit assembly pipe 1MQ refrigerant refrigerant or more Yes Remedy Treat the leakage point Supply additional refrigerant Check the status of PCB CN EEV1 Sensor assembly Connector Is the EEV properly Check the status of EEV assembly assembled Check PCB IPM input signal connectors short circuit gt Refer to Tester CH21 trouble shooting method Remedy LEV assembly replacement L Yes e Ccheck the sensor assembly status O Check if the sensor is burned measure resistance gt 200K0 10 25 C basis Is the inverter compressor sensor normal Copyright 2009 LG Electronics Inc All right reserved 42 Only for training and service purposes LGE Internal Use Only 8 CH40 CT Sensor Error Open Short Error Code Error Detection Cause of Error Check Point AC Input current CH40 Comp phase current PCB sensing circuit part Check power input connector Comp output sensing circuit basic burned current sensing circui voltage sensing error Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other par
33. ff warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting Cond Pipe Sensor Remove blockings around heat exchanger 1 Set Multi tester as resistance Maintain distance between outdoor unit and measurement mode the wall 2 Measure the resistance between rated Check fan locking Is the unit properly installed Check pipe folding and abnormality speed Comp Discharge sensor connector Check SVC valve lock pins MA 3 Measure resistance value of 5k0 10 Yes y 25 C basis 4 Check if the sensor insulation is damaged gt measure the resistance between sensor connector pin and unit assembly pipe 1MQ or more Is the refrigerant SANGA propery charged Check if refrigerant is overcharged Remedy adjust refrigerant volume Sensor Connector assembled assembly Check the status of EEV assembly Tester Remedy EEV ble repl L Yes emedy reassemble replacemen Check the sensor assembly status peca Check if the sensor is burned measure resistance gt 5K0 10 25 C basis Copyright 2009 LG Electronics Inc All right reserved 61 Only for training and service purposes LGE Internal Use Only 12 CH62 Heat Sink Overheat Error Error Code Error Detection Cause of Error Check Point Overload operation Outdoor fan
34. ghten the service port nut to a torque of 1 8 kg m Be sure to check for gas leakage s33 LGE Internal Use Only Part 4 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 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 Copyright 2009 LG Electronics Inc All right reserved 23 Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting Outdoor unit Charging cylinder ah 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
35. gt the difference between each phase current should be within 2A Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 50 Only for training and service purposes LGE Internal Use Only Verifying compressor burn Comp 1 Remove the connectors to the PCB 2 Measure the resistance between the lines of each terminal of the compressor Refer to Table 1 3 Measure the resistance between each terminal and the chassis pipe of the compressor Refer to Table 2 4 If the measurements are distinctively different from Table 1 and 2 the compressor is decided to be burned Verifying IPM burn 1 Remove the connectors to the PCB 2 Set Multi tester as Diode voltage measurement mode 3 Measure voltages of P U P V P W as shown in figure 1 below 4 Measure voltages of U Nu V Nu W Nu as shown in figure 2 below 5 If the measurements are distinctively different as in the figures the IPM is decided to be burned Figure 1 Copyright 2009 LG Electronics Inc All right reserved 51 Only for training and service purposes Table 1 Resistance between the lines of each U V 15 20 V W 15 20 W U 15 20 Table 1 Resistance of terminal insulations U chassis 1MQ 1 V chassis 1MQ W chassis 1MQ Figure 2 LGE Internal Use Only 2 CH22 CT2 Error Input Over current Inspection Error Det
36. he below measuring point DC Check pipe folding and abnormality voltages at Power on standby state Check service valve lock 3 If the measurements are outside DC 2 5V Yes Remedy remove cause of error 0 2v the parts are decided as burned Check compressor locking Check compressor wire disconnection Is the compressor normal open negative phase Check inside wire open short Check inside insulation damage Yes Remedy Rearrange compressor wire disconnections Replace compressor Check PCB Comp connector assembly status Is the outdoor unit PCB Check if PCB IPM burned IPM normal Check PCB IPM input signal connectors short circuit gt Refer to CH21 trouble shooting method Yes Remedy replace PCB Assembly Is Check phase current sensing part PCB phase current voltage measurements at Power on sensing circuit part standby state U V W gt DC 2 5V normal 0 2V Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 39 Only for training and service purposes LGE Internal Use Only 5 CH27 PSC Fault Over current Error circuit Reactor Spec Burned PCB internal PSC Module Error Code Error Detection Cause of Error Check Point Overload operation Overcurenton e ed Check outdoor fan constraint screened flow CH27 AC gt DC converter Wrong application of urare Check Reactor Spec 10A 26 8mH Check for PCB in
37. he data transmitted by the indoor unit is not CH53 e Communication error caused by Check the status of indoor outdoor unit received for 3 3 external noise ground connections minutes matas f pla Indoor outdoor unit communication Check if outdoor unit communication parts are continuously den circuit parts burned burned Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check if the indoor unit power is on Are the power and the Check the status of indoor unit normal operation Status of indoor operation when it is powered on again by remote controller Remedy replace Indoor unit PCB Yes Assembly the Ka and Check indoor outdoor unit power and communication lines communication line connection LAN connection status status and the status of disconnection ormal misplacement Check the status of outdoor unit grounding connection Check the status of indoor unit grounding connection Check if there is a power line causing noise near indoor outdoor unit power communication lines Is the grounding connection status normal Yes Remedy connect grounding and remove cause of error Is outdoor Check the status of outdoor unit unit communication communicat
38. http biz Igservice com Room Air Conditioner MODEL General Wall Mounted Inverter Type 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 Ti SaleTy Precautions a ARIANA NAA 4 2 dw EVEN 7 Part 2 Functions amp Controls T List Of Functions amp Controls AA 9 2 Basic Mode Control ui 10 3 Special Mode Controls arrasar ri 12 4 Utility FUNCIONS aaa NBA aia 13 Part3 Test Run 1 Check before Test Run cccccssecccccccseeececccceesecececeseeececeeeueeeeeeneeeeeeseneeesseeaeenneseesaneeees 17 2 Test RuniFlow char dai atada 18 3 Test RUN Detail da 19 Part 4 Trouble Shooting Guide UE E E EVA E EA 2 PUMPING DOWN BEE 22 3 Evacuation All amount of refrigerant leaked 00mannannuaanunanananauaanannasun0n 23 4 Gas Charging After Evacuation cccsccseccseesseeeseeeeneeeeneenseeeeeeseseeeneeeseeeeseneneneeees 24 5 Cycle Troubleshooting Guide iiccocioiocuoccnincccancinnicnnnanaootiniaiakoraandanna sonia rinda naar nio rcncuisz 25 6 Electric Parts Troubleshooting Guide oooomcconncnnnnssncnsnncncncarencnnnaner carr nnnr narran 26 7 Self diagnosis FUNCION maana seria ansias ntanna anaandaa aena santana 30 Copyright 2009 LG Electronics Inc All right reserved 2 Only for training and service purposes LGE Internal Use Only g Part1 Ge
39. i EEPROM misapplied CH60 outdoor unit PCB Outdoor unit PCB EEPROM assembly EEPROM EEPROM poor assembly Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check if EEPROM is missing Is the EEPROM properly Check the status of the EEPROM assembled assembly Remedy reassemble EEPROM Replace PCB Assembly Inspecting Outdoor EEPROM Assembly Status 1 Check the consistency of the EEPROM s direction inserted in the PCB and the EEPROM marking EEPROM Copyright 2009 LG Electronics Inc All right reserved 60 Only for training and service purposes LGE Internal Use Only 11 CH61 Cond Pipe Overheat Error Error Code Error Detection Cause of Error Check Point Overload operation Outdoor fan constraint screened blocked Outdoor unit heat exchanger High temperature in contaminated outdoor Cond Pipe EEV connector displaced poor EEV assembly Poor Cond Pipe sensor assembly burned Check outdoor fan constraint screened flow structure Check if refrigerant overcharged Check the status of EEV assembly Check the status of sensor assembly burn CH61 Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is o
40. ight reserved 36 Only for training and service purposes LGE Internal Use Only 2 CH22 CT2 Error Input Over current Inapacilon Error Detection Cause of Error Check Point Number Input voltage error low voltage Check input voltage CH22 AC Input current is higher Over load operation Check outdoor fan constraint screened flow than the limit Outdoor fan constraint structure screened blocked Check PCB current sensor parts Burned parts inside PCB Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting PCB input current sensing circuit Is the input voltage Check if the input voltage is 1 Set Multi tester as DC voltage measurement mode normal within AC 190 260 V 2 Measure the measuring point DC voltages at Power on standby state Remedy inspect repair power 3 If the measurements are outside DC 2 5V 0 2V the board parts are decided as burned Yes Check Fan constraint indoor outdoor unit Remove blockings around heat exchanger Maintain distance between outdoor unit and the wall Check overcharge refrigerant leakage Check service valve lock Check pipe folding Is the unit installed properly is the Check voltage measurement on the in
41. indoor fan speed again operates at low speed or comes to a stop 2 4 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 and vice versa 4 C 8 F Switching point 2 C 4 F 0 5 C 1 F Setting Temp 0 5 C 1 F 2 C 4 F Heating thermo off Cooling thermo off Switching point Cooling Mode operation Heating operation l l l Cooling operation Copyright 2009 LG Electronics Inc All right reserved 11 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 3 Spec 3 1 Jet Cool operation e In the heating mode or Auto Changeover operation the Jet cool function does not work When it is input while in other mode of operation cooling dehumidification Air purification Air circulation the Jet cool operation takes place 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 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
42. inutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting Inverter Compressor Discharge Check the status of the PCB connector Sensor Is the sensor properly assembly 1 Set Multi tester as resistance measurement assembled Check the status of the sensor assembly mada 2 Measure resistance between the sensor connectors Yes Remedy reassemble the sensor 3 Check if the sensor insulation is damaged gt Measure resistance between sensor Check if the sensor is disconnected connector pin and the unit assembly pipe Check if the sensor is burned 1MQ or more Is the sensor normal measure the resistance Check if the sensor insulation is Sensor Resistance Value 25 C basis damaged Inv D Pipe Sensor 200k Outdoor Inlet Sensor 10k Cond Pipe Sensor 5k B Diode Heat Sink Sensor 10k Copyright 2009 LG Electronics Inc All right reserved 44 Only for training and service purposes LGE Intemal Use Only 10 CH53 Outdoor Unit lt gt Indoor Unit Communication Error Error Code Error Detection Cause of Error Check Point No power on indoor unit Check indoor unit power status Indoor outdoor unit Power connection Check indoor outdoor unit error communication line not installed power communication line disconnection If t
43. ion connector assembly circuit normal Check the status of outdoor unit power connector assembly Remedy reconnect connectors replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 45 Only for training and service purposes LGE Internal Use Only 11 CH60 Outdoor Unit PCB EEPROM Error Error Code Error Detection Cause of Error Check Point e Outdoor unit PCB Incorrect checksum of CH60 outdoor unit PCB EEPROM misapplied EEPROM assembly EEPROM Outdoor unit PCB EEPROM poor assembly Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check if EEPROM is missing Is the EEPROM properly gt Check the status of the EEPROM Na assembled assembly Remedy reassemble EEPROM Replace PCB Assembly e Inspecting Outdoor EEPROM Assembly Status 1 Check the consistency of the EEPROM s direction inserted in the socket and the EEPROM marking 2 Check if the EEPROM is securely inserted in the socket poor connection 3 Check if the EEPROM Lead Pin is missing in the socket 29 mF EEPROM a o ata L e 301 e yet Pepe e 46 Copyright 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes
44. ist of Controls amp Functions aka NANANA ANAN ANAN NG 9 2 Basic Mode Control aaa naa ada 10 3 Special Mode Control ANAN 12 4 Utility FUNCION RANA AGA NANANA GNG 13 Copyright 2009 LG Electronics Inc All right reserved 8 Only for training and service purposes LGE Internal Use Only Part 2 Functions 8 Controls Category Function Description Remark Cooling Mode Cooling operation Heating Mode Heating operation Basic mode EES controls Healthy Dehumidification Dry 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 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 Auto 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 NOTE The Exploded View SVC Manual has the particular Function table for each model Copyright 2009 LG Ele
45. it between MICOM PIN and CN DISP1 PIN e Check receiver ass y Copyright 2009 LG Electronics Inc All right reserved 27 LGE Intemal Use Onl Only for training and service purposes y Part 4 Trouble Shooting Trouble 3 The Compressor Outdoor Fan don t operate 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 stopped a 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 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 d Check the electrical wiring diagram of Outdoor side Check the open or short of connecting wires between Indoor and Outdoor Copyright 2009 LG Electronics Inc All right reserved 28 Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting Trouble 4 When indoor Fan does not operate Turn off main power a Check the connection of CN FAN J Check the Fan Mot
46. ith charging cylinder Gas releasing i Open 6 Servicing Open Open with charging cylinder Copyright 2009 LG Electronics Inc All right reserved 21 Only for training and service purposes LGE Internal Use Only 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 Copyright 2009 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 ti
47. k compressor locking Compressor input Outdoor fan constraint Check outdoor fan constraint screened flow CH29 ne phase current is high screened blocked structure Burned PCB phase Check for PCB phase current sensor part current sensor part Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting PCB phase current sensing circuit Check fan locking 1 Set Multi tester as DC voltage measurement Remove blockings around heat mode exchanger 2 Measure at the below measuring point DC Maintain distance between i outdoor unit and the wall voltages at Power on standby state Check pipe folding and 3 If the measurements are outside DC 2 5V abnormality 0 2V the parts are decided as burned Check service valve lock Is the unit properly installed Yes Remedy remove cause of error Check compressor locking Check compressor wire Is the compressor normal disconnection open negative phase Check inside insulation damage Remedy Rearrange compressor wire disconnections Replace compressor Yes Tester Check phase current sensing part la voltage measurements at Power on standby state U V W gt DC 2 5V 0 2V phase current sensing circuit part
48. l right reserved 55 Only for training and service purposes LGE Internal Use Only 6 CH32 Inverter Compressor D Pipe Overheat Error Error Code Error Detection Cause of Error Check Point Overload operation Outdoor fan constraint screened blocked Check outdoor fan constraint screened flow High temperature in Refrigerant leakage structure CH32 Discharge pipe of the insufficient Check refrigerant leakage inverter compressor Poor INV Comp Discharge Check if the sensor is normal sensor Check the status of EEV assembly LEV connector displaced poor LEV assembly Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking Inspecting Inverter Compressor Discharge Remove blockings around heat Sensor exchanger Set Multi tester as resistance measurement Maintain distance between outdoor mode 4 Is the unit properly installed unit and the wall 2 Measure the resistance between inverter f Mi coca discharge sensor connector pins Yes 3 Measure resistance value of 200KQ 10 Remedy remove cause of error 25 C basis 4 Check if the sensor insulation is damaged gt Check refrigerant leakage measure the resistance between sensor Is there enough
49. locking Check compressor wire disconnection open negative phase Check inside wire open short Check inside insulation damage Remedy Rearrange compressor wire disconnections Replace compressor Check PCB Comp connector assembly status Check if PCB IPM burned Check PCB IPM input signal connectors short circuit gt Refer to CH21 trouble shooting method Remedy replace PCB Assembly Check phase current sensing part voltage measurements at Power on standby state U V W gt DC 2 5V 0 2V Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 54 Only for training and service purposes Inspecting PCB phase current sensing circuit 1 Set Multi tester as DC voltage measurement mode 2 Measure the below measuring point DC voltages at Power on standby state 3 If the measurements are outside DC 2 5V 0 2V the parts are decided as burned Comp current GND A d an Nag om Ki x E an li E Ki PELUT 0 WI ano a LGE Internal Use Only 5 CH29 Compressor phase Over current Error only verifiable at Outdoor unit PCB Assembly Error Code Error Detection Cause of Error Check Point Compressor blocked Overload operation Check compressor locking Compressor input Outdoor fan constraint Check outdoor fan constraint screened flow CH29 es phase current is high screened blocked structure
50. mes 26 DC Comp Position Error 2 Times 6 Times 2 Times 6 Times 27 PSC Fault Error 2 Times 7 Times 2 Times 7 Times 28 DC Link High Volt 2 Times 8 Tiems 2 Times 8 Tiems 29 Inverter Compressor over current 2 Times 9 Times 2 Times 9 Times 31 CT error low current 3 Times 1 Time 3 Times 1 Time 32 D Pipe High INV 3 Times 2 Times 3 Times 2 Times 40 CT Sensor Open Short 4 Times 4 Times 41 INV D Pipe Th Error Open Short 4 Times 1 Time 4 Times 1 Time 44 Outdoor Air Th Error Open Short 4 Times 4 Times 4 Times 4 Times 45 Cond Middle Pipe Error Open Short 4 Times 5 Times 4 Times 5 Times 48 Cond Out Pipe Error Open Short 4 Times 8 Tiems 4 Times 8 Tiems 53 Communication Failure Outdoor Unit lt Indoor Unit 5 Times 3 Times 5 Times 3 Times 60 EEPROM Check Sum Error 6 Times 6 Times 61 Cond Pipe High 6 Times 1 Time 6 Times 1 Time 62 Heatsink High 6 Times 2 Times 6 Times 2 Times 63 Cond Pipe Low 6 Times 3 Times 6 Times 3 Times 65 Heatsink Th Error Open Short 6 Times 5 Times 6 Times 5 Times Copyright 2009 LG Electronics Inc All right reserved 31 Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting E Troubleshooting Guide Indoor Unit Inspection Number Description of Inspection Cause of Error Check Point Check Sensor connection status and CHO1 Indoor Temperature Sensor Sensor short open Check Sensor Resistance l Check Sensor connection status and CH02 Indoo
51. neral Information T Safety PVECAUTONS aaa NN AA NAAN AN 4 2 Nomenclaluk pu mana dE ERR SEeE Ee dee 7 Copyright 2009 LG Electronics Inc All right reserved 3 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 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 completely at a well ventilated place first Otherwise
52. nnecting cable each color e The P W B Ass y Fuse Noise Filter Power Module SMPS IC01D IC04D e 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 Copyright 2009 LG Electronics Inc All right reserved 26 LGE Internal Use Onl Only for training and service purposes y Part 4 Trouble Shooting Trouble 2 Product doesn t operate with the remote controller Turn on main power lt gt While the compressor has been stopped the compressor does not operate owing to the delaying function for 2 minutes after stopped gt 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 lt gt e Caused by the remote controller Caused by other parts except the remote controller Se E When the mark 4 is displayed in LCD screen replace battery Check the contact of CN DISP 1 2 connector ES Check DISP P C B Ass y Voltage between CN DISP1 DC 5V Check point e Check the connecting circu
53. normal Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 41 Only for training and service purposes LGE Internal Use Only 7 CH32 Inverter Compressor D Pipe Overheat Error Error Code Error Detection Cause of Error Check Point Overload operation Outdoor fan constraint screened blocked Check outdoor fan constraint screened flow High temperature in Refrigerant leakage structure CH32 Discharge pipe of the insufficient Check refrigerant leakage inverter compressor Poor INV Comp Discharge Check if the sensor is normal sensor Check the status of EEV assembly LEV connector displaced poor LEV assembly Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking Inspecting Inverter Compressor Discharge Remove blockings around heat Sensor exchanger 1 Set Multi tester as resistance measurement Maintain distance between outdoor mode unit and the wall 2 Measure the resistance between inverter Check pipe folding and abnormality Is the unit properly installed Check service valve lack discharge sensor connector pins Yes 3 Measure resistance value of 200KQ 10 Remedy remove cause of error 25 C basis 4 Check i
54. 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 Indoor temp Operating Mode Setting temp Se em al 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 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 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 ON OFF Cooling CYCLE Fan 30 Min Comp ON OFF Indoor Fan Setting Step Super Low Copyright 2009 LG Electronics Inc All right reserved 13 Only for training and service purposes LGE Internal Use Only Part 2 Functions amp Controls 4 3 Air volume control e Ulndoor fan motor control have 6 steps or 8 steps Step Description e UAir volume is controlled SH H MH M ML L by the SL Super Low
55. on All amount of refrigerant leaked 70002000umasununanunaasunnnauunusanan 23 4 Gas Charging After Evacuation mmaamannaa naan aaanaaaanasanannA cnn 24 5 Cycle Troubleshooting Gulde Nama NANANG 25 6 Electronic Parts Troubleshooting Guide 2 mnannnannnanaaananaananaananananannananannnaananann 26 T Self diagn sis OTTO LEE 30 Copyright 2009 LG Electronics Inc All right reserved 20 Only for training and service purposes LGE Intemal Use Only Part 4 Trouble Shooting 2 way Valve Liquid Side 3 way Valve Gas Side Hexagonal wrench 4mm Flare nut Open position Closed position To piping connection To outdoor unit Valve cap Flare nut piping connection To outdoor unit Service Service port cap port Open position Closed position Pin Works Shaft position Shaft position Service port Shippin Closed Closed Closed pping with valve cap with valve cap with cap Air purging Open Closed Open 1 Installation counter clockwise clockwise push pin or with vacumm pump Open Open Closed O t Pere with valve cap with valve cap with cap Pumping down Closed Open Open 2 Transfering clockwise counter clockwise connected deeg gauge Evacuation Open Open Open 3 Servicing oe Gas charging Open Open Open 4 Servicing with E cylinder Pressure check f Open _ 5 Servicing Open Open w
56. or Q Check the Fuse AC250V T2A J Check the related circuit of indoor Fan Motor e The pin No 8 of micom and the part for driving SSR Q01M e Check the related pattern e Check the SSR SSR Open Indoor Fan Motor never operate SSR short Indoor Fan Motor always operates in case of ON or OFF Q 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 duh About AC 160V over About AC 50V over SSR is not damaged Check SSR Copyright 2009 LG Electronics Inc All right reserved 29 Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting 7 Self diz E Error Indicator e The function is to self diagnoisis airconditioner and express the troubles identifically if there is any trouble 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 E Indoor Unit Error 1 SB SC SH S4 S5 Chassis Error
57. ors Yes Remedy reassemble the sensor 3 Check if the sensor insulation is damaged gt Measure resistance between sensor Check if the sensor is disconnected connector pin and the unit assembly pipe Check if the sensor is burned 1MQ or more Is the sensor normal measure the resistance Check if the sensor insulation is Sensor Resistance Value 25 C basis damaged Inv D Pipe Sensor 200k Outdoor Inlet Sensor 10k Cond Pipe Sensor 5k B Diode Heat Sink Sensor 10k Copyright 2009 LG Electronics Inc All right reserved 58 Only for training and service purposes LGE Internal Use Only 9 CH53 Outdoor Unit lt gt Indoor Unit Communication Error received for 3 minutes continuously Error Code Error Detection Cause of Error Check Point No power on indoor unit Check indoor unit power status If the data E R e Indoor outdoor unit Power connection Check indoor outdoor unit transmitted by the SECH SE a in indoor unit isnot error communication line not installed power communication line disconnection CH53 Communication error caused by Check the status of indoor outdoor unit external noise circuit parts burned Indoor outdoor unit communication Check if outdoor unit communication parts are ground connections burned Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at s
58. put current sensor at the power on standby state gt DC 2 5V 0 2V PCB input current sensor normal Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 37 Only for training and service purposes LGE Internal Use Only 3 CH23 DC Link Low Voltage Error Inspection Error Detection Cause of Error Number Check Point DC Link voltage is lower CH23 than the limit Unger DC Voltage Burned parts inside 140Vrms PCB Input voltage error low Check input voltage Check PCB DC Link voltage sensor parts Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check if the input voltage is Is the input voltage Keen within AC 190 260 V normal Remedy inspect repair power Yes board No Measure DC Link voltage at Is the PCB Power Power on standby state part normal DC 280 310V Yes Remedy replace PCB Assembly If measurement of DC Link j voltage at Power on PCB DC ee e standby state is DC 280 SE E 310V and DC Link sensed voltage DC 2 4 2 8V Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 38 Only for training and service purposes
59. r pipe entry temperature sensor Sensor short open Check Sensor Resistance Check Sensor connection status and CH06 Indoor pipe exit temperature sensor Sensor short open Check Sensor Resistance PARIN Check Sensor connection status and CH12 Indoor pipe middle temperature sensor Sensor short open Check Sensor Resistance 1 Check if the temperature connection part is securely connected 2 After disconnecting from Temperature Sensor PCB Assembly measure each sensor s resistance e Location of the sensor THI Heat exchange ig o RES Liquid pipe za TH2 Eet 5 T Fan gt Gas pipe UTH1 D Air Conditioner Operation Standard Symbol Color of the Connector Title Resistance Remark TH1 White CN TH1 Indoor Temperature Sensor 10 KO Pipe entrance Temperature Sensor 5KQ f 25 C Basis TH2 Red CN TH2 Middle Pipe Temperature Sensor 5KQ TH3 White CN TH3 Pipe Exit Temperature Sensor 5KQ 3 If the measurement indicates infinite or O Q please replace temperature sensor 4 If the measurement is normal then please check main indoor PCB and replace Method of Measurement 1 Disconnect Temperature Sensor connector from the board 2 Place the range of the tester at Q 3 Measure the connector resistance Connector Copyright 2009 LG
60. re 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 2009 LG Electronics Inc All right reserved 17 Only for training and service purposes LGE Internal Use Only Part3 Test Run START Test operation for indoor unit iti i No l Operate the unit in cooling mode Refer to part4 7 Electric part Does Test operation start Yes Is cold air discharged for 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 NOTE When outdoor temperature is low the unit is operated to Heating mode Copyright 2009 LG El
61. sive 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 GO oO GO SG Do not block the inlet or outlet of air flow It may cause product failure 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 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 SDbes Check the drainage of the indoor unit after the repair If drainage is faulty the water may enter the room and wet floor Copyright 2009 LG Electronics Inc All right reserved 6 Only for training and service purposes LGE Internal Use Only Part 1 General Information A S W 1 2 6 B MSO 112 3 4 5 6 7 3 9 10 Code Type Code of Model Meaning 1 Production Center A Z L Chang won R22 Refrigerant A Ch
62. tandby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Are the power and the operation status of indoor unit normal the power and communication lines connection status grounding connection status unit communication circuit normal Check if the indoor unit power is on Are Check the status of indoor unit normal operation when it is powered on again by remote controller Remedy replace Indoor unit PCB Assembly Check indoor outdoor unit power and communication line connection L amp N status and the status of disconnection ormal misplacement Check the status of outdoor unit grounding connection Check the status of indoor unit grounding connection Check if there is a power line causing Yes noise near indoor outdoor unit power communication lines Remedy connect grounding and remove cause of error Is outdoor Check the status of outdoor unit communication connector assembly Check the status of outdoor unit power connector assembly Remedy reconnect connectors replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 59 Only for training and service purposes LGE Internal Use Only 10 CH60 Outdoor Unit PCB EEPROM Error Error Code Error Detection Cause of Error Check Point Incorrect checksum of Outdoor unit PGB
63. ternal part burn parts Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking Remove blockings around heat exchanger Maintain distance between outdoor unit and the wall Check pipe folding and abnormality Check service valve lock Is the unit properly installed 7 Inspecting PCB PSC Module signal input connector short circuit 1 Set Multi tester as DC voltage measurement mode Check the short circuits between PSC Module lower part input signal pins at Power off state 2 Remedy remove cause of error Check Reactor spec lt ls the reactor normal gt 10A 26 8mH Remedy replace reactor Check short circuit of PCB PSC Module input signal connector K 4 5pins are internally short circuited PSC Module 4 5 pins are warning internally short circuited Remedy replace PCB Assembly Copyright 2009 LG Electronics Inc All right reserved 40 Only for training and service purposes LGE Internal Use Only 6 CH29 Compressor phase Over current Error only verifiable at Outdoor unit PCB Assembly Error Code Error Detection Cause of Error Check Point Compressor blocked Overload operation Chec
64. ting 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 temp C Heating ON temp Setting temp Heating OFF temp Setting temp 4 0 C 8 F Kab 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 Auto Swing l A 15 Copyright 2009 LG Electronics Inc All right reserved LGE Internal Use Only Only for training and service purposes Part 3 Test Run RN Part3 Test Run 1 Check before Test PUM aNG AANGAL 17 2 TESURUN Flow Chad SAAN NAN 18 3 Test Run Detallada NPA cadens nna 19 Copyright 2009 LG Electronics Inc All right reserved 16 Only for training and service purposes LGE Internal Use Only Part3 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 mo
65. ts Inspecting current sensing circuit DC voltage measurement at the 1 Set Multi tester as DC voltage Is AC input current sensor measurement point in figure 1 RO1N measurement mode ma partnoma AT at power on standby state gt measured gt DG voltage measurement at both end of D e a RO1N at power on standby state gt R l measured value should be within 2 5V Remedy replace PCB Assembly 0 2v Yes 3 DC voltage measurement at the measurement point in figure 2 at power on Is the DC voltage measurement at the standby state gt measured value should be Comp phase current e measurement point in figure 2 at within 2 5V 0 2V SS sensor part normal w7 power on standby state gt measured a a value within 2 5V 0 2V iI Tester ma aj Copyright 2009 LG Electronics Inc All right reserved 43 Only for training and service purposes LGE Internal Use Only 9 CH41 44 45 65 Inv D Pipe Outdoor Inlet Cond Pipe Heat sink Sensor Error Error Code Error Detection Cause of Error Check Point Inv D Pipe sensor CH41 open short CH44 Outdoor Inlet sensor Sensor displacement poor open short assembly Check the status of sensor assembly CH45 Cond Pipe sensor Sensor burned disconnection Check if sensor is burned open short insulation damage B Diode Heat sink sensor CH65 open short Before checking PCB or each outdoor electric parts wait for 3 m

Room Air Conditioner SVC MANUAL(General)

Contents

Download Pdf Manuals

Related Search

Related Contents