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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use Only

Part 2 Functions & Controls

5.12 Low Ambient control

• If outdoor temperature drops below certain temperature, liquid back is prevented by reducing fan speed.

• It can prevent frosting of evaporator and keep cooling operation

• No matter even if the outdoor temperature reaches -10°C.

• You can Cool your room at your desired temperature all your around.

5.13 Test Operation (Cooling)

• Press the Tact Switch for compulsory operation of the main body for 3 seconds in order to operate the unit in the trial

operation mode.
- Operation mode: Cold
- Indoor pan: Strong wind
- COMP frequency: Step 5
- COMP compulsorily operates for about 18 minutes irrespective of indoor temperature.

Freq.

- 0

°

C

°

…

Outdoor temp.

Outdoor pipe temp.
0

°

C outdoor fan On/Off

control

°

Comp Freq.

Outdoor fan

On

On

Off

Off

Outdoor temp.:-10

°

C

-5

0

5

10

15

20

25

0

50

100

150

200

Time(Min.)

Temp.(

°

C)

Outdoor fan On/Off control

Cond . temp.

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Содержание Art Cool Gallery Series

Страница 1: ...tioner SVC MANUAL General MODEL ARTCOOL Inverter Type CAUTION Before Servicing the unit read the safety precautions in General SVC manual Only for authorized service personnel Internal Use Only http biz lgservice com ...

Страница 2: ...S Part 1 General Information 1 Safety Precautions 3 2 Nomenclature 6 Part 2 Functions Controls 1 List of Functions Controls 8 2 Basic Mode Controls 10 3 Special Mode Controls 12 4 Utility Functions 13 5 Protection Functions Controls 18 Part 3 Test Run 1 Check before Test Run 25 2 Test Run Flow Chart 26 3 Test Run Detail 27 Part 4 Trouble Shooting Guide 28 ...

Страница 3: ... 2 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 1 Safety Precautions 3 2 Nomenclature 6 Part 1 General Information ...

Страница 4: ...t is connected to the power cables This volt age is extremely dangerous and may cause death or severe injury if come in con tact with it Do not touch the discharging refrigerant gas during the repair work The discharging refrigerant gas The refrigerant gas can cause frostbite Release the refrigerant gas completely at a well ventilated place first Otherwise when the pipe is disconnected refrigerant...

Страница 5: ... ventilated place Using the welder in an enclosed room can cause oxygen deficiency Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 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 t...

Страница 6: ...e metal section Earth position If the resistance value is low a disaster such as a leak or electric shock is caused at user s side Check the drainage of the indoor unit after the repair If drainage is faulty the water to enter the room and wet floor 1 2 Inspections after Repair Check to see if the power cable plug is not dirty or loose If the plug is dust or loose it can cause an electrical shock ...

Страница 7: ...V 60Hz C 575V 50Hz 3Phase 5 200 220V 50Hz D 440 460 60Hz 3Phase 6 220 240V 50Hz E 265V 60Hz 7 110V 50 60Hz F 200V 50 60Hz 8 380 415V 50Hz 9 380 415V 60Hz 7 Chassis A Z Name of Chassis of Unit 8 Look A Z Look Color Artcool Model 9 Function A Z 10 Serial No 0 9 LG Model De ARTCOOL COLOR SF velopment Serial No Basic A Basic 4Way B Plasma Filter C Plasma Filter 4 Way D Tele LCD E Tele LCD Nano plasma ...

Страница 8: ...right reserved Only for training and service purposes LGE Internal Use Only Part 2 Functions Controls 1 List of Controls Functions 8 2 Basic Mode Controls 10 3 Special Mode Controls 12 4 Utility Functions 13 5 Protection Functions Controls 18 ...

Страница 9: ...automatically selected for comfort on Cooling Heating mode Cooling mode is automatically changed to heating mode and vice verse Powerful cooling mode Powerful heating mode Air volume set temp are automatically selected for saving energy in cooling mode Operation without remote controller After cooling operation this function makes the evapo rator dry Air filtration using plasma filter Electric hea...

Страница 10: ...charge Pipe Temp Control Low Ambient Function Comp Torque Control Optional Category Function Description Remark For noise prevention For overload prevention To prevent cold wind blow on heating mode start Evaporator frost prevention Condenser frost prevention Over current prevention Modulation of voltage frequency Power factor correction To prevent overloading To protect power module For cycle sta...

Страница 11: ...off the compressor can restart minimum 2 minutes later 2 2 Heating Mode 2 C 4 C Comp OFF INV Comp Frequency Low High Low High Comp OFF Setting Temp Thermo ON Thermo OFF Operating frequency of compressor depend on the load condition The difference between the room temp and set temp frequency restrictions If compressor operates at some frequency the operating frequency of compressor cannot be change...

Страница 12: ... the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature and operation mode The air volume is automatically set according to the intake air temperature 2 5 Auto changeover operation The air conditioner changes the operation mode automatically to keep indoor temperature When room temperature vary over 2 C with respect to setting tempe...

Страница 13: ...r outflow could reach further 3 2 Jet Heat operation 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 In the Jet Heat mode the indoor fan operated at super high speed for 60 min at Heating mode operation In the Jet Heat mode the room temperature is maintained at...

Страница 14: ...in unit of the appliance and operate the appliance in the standard conditions The operating condition is set according to the outdoor temp and intake air temperature as follows The unit select the last operation mode in 3 hours 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 pres...

Страница 15: ...eration 4 4 Natural Air Control Auto Wind When the Auto Step is selected and then operated the high medi um or low speed of the airflow mode is operated for 2 15 sec ran domly by the Chaos Simulation 4 5 Auto Swing By the Chaos swing key input the upper lower vane automatically operates with the Chaos swing or it is fixed to the desired direction LL Very low In heating mode L Low M Med H High SH S...

Страница 16: ...or heating cycle While in heating mode 60 min after the start of the sleep timer the getting temperature decreases by 1 C After another 60minutes lapse it decreases again by 1 C 4 7 Auto restart When the power comes back after a sudden power failure during operation the mode before the power failure is kept on the memory and the appliance and it automatically operates in the saved mode on the memo...

Страница 17: ...utside pipe and tempera ture of the compressor as outdoor temperature becomes low Enter preheat operation of the compressor if meeting conditions as below at the same time where outdoor temperature is less than 5 C where discharge temperature of the compressor is more than 15 C where the compressor turns off Release preheat operation if meeting one or more of conditions where outdoor temperature i...

Страница 18: ...lecting additional heat Logic Flickering numbers of LED 1 time When selecting existing heat Logic Flickering numbers of LED 2 times 3 Setting is selectable regardless of operation status on off Tact S W Buzzer sound Operation LED Flickering 4 times 10sec ON OFF ON OFF When selecting additional heat Logic 1 5sec 1time 2times When selecting existing heat Logic 0 25sec 0 25 3sec 1 5sec 1 5sec 1 5sec ...

Страница 19: ... wind blowing the indoor fan does not rotate until the temp of heat exchanger reaches 30 C model by model 5 4 Freeze prevention Protection of the evaporator pipe from frosting If the indoor pipe temperaure is below 0 C in 7 min after the compressor operates without pause while in cooling cycle operation mode compressor outdoor fan are turned off When indoor pipe temp is 7 C or higher after 2 min p...

Страница 20: ...made to defrost the evaporator pipe of the outdoor unit Defrosting control is available 50 minutes later after heating cycle has started and the pipe temperature of outdoor unit reaches below 6 C Setting Freq Operating Freq of Comp 4 Way EEV Open step Outdoor FAN Indoor FAN Pre Heat LED Deice STEP Fh min Minimum Time of Heating Main Deice time Fh min Fh min ON OFF Setting Speed ON Hot Start OFF Ho...

Страница 21: ...ontrol sequence power on PTC operating power relay on 5 7 Inverter 5 7 1 Inverter Control 1 The single phase power AC is converted into DC 2 The single phase power DC is converted into a three phase shopped 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 o...

Страница 22: ...erating frequency of the compressor decreases After decreasing the operating frequency by 1step if operating current is below I1 for 60 seconds continuously the operating frequency of compressor increases by 1step 5 9 2 CT2 control If the operating current of the appliance reaches I2 the compressor stop instantly and two minutes later the compres sor restarts again If CT2 occurs 5 times within one...

Страница 23: ... ERROR CODE 6 5 10 3 DC Peak Current Error by the Outdoor Fan Lock If this problem occurs 5 times within 1 hour in case of the temperature of outdoor pipe TH is over 65 C while the com pressor is operating the appliance turns off and displays ERROR CODE 6 5 11 Discharge Pipe Temp Control If the temperature of the discharge pipe of compressor reaches over 130 C or below 30 C the compressor stops in...

Страница 24: ... You can Cool your room at your desired temperature all your around 5 13 Test Operation Cooling Press the Tact Switch for compulsory operation of the main body for 3 seconds in order to operate the unit in the trial operation mode Operation mode Cold Indoor pan Strong wind COMP frequency Step 5 COMP compulsorily operates for about 18 minutes irrespective of indoor temperature Freq 0 C Outdoor temp...

Страница 25: ... 24 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 Test Run 1 Check before Test Run 25 2 Test Run Flow chart 26 3 Test Run Detail 27 ...

Страница 26: ...e between power supply terminal block and ground Do not operate in the case of 2 0 MΩ or less NOTE Never carry out mega ohm check over terminal control board Otherwise the control board may break Immediately after mounting the unit or after leaving it turned off for an extended length of time the resistance of the insulation between the power supply terminal board and the ground maydecrease to app...

Страница 27: ...ng mode Does Test operation start Refer to part4 7 Electric part Yes No Yes Refer to part4 5 Cycle part No Is hot air discharged After Hot Start Yes No Is there any temperature difference between intake and discharged air Yes No Is the operating current normal Yes Normal Refer to Troubleshooting Guide No Check the load In Out Temp Check pipe length and amount of refrigerant Check for abnormal soun...

Страница 28: ... intake and discharge of air 3 Ensure the difference between the intake temperature and the discharge is more than 8 C 46 F Cooling or Heating 4 For reference the gas side pressure of optimum condition is as below Cooling Bolt Tubing connection Discharge temperature Discharge air Intake temperature R 22 35 C 95 F 4 5kg cm2 G 56 8 71 0 P S I G R 410A 35 C 95 F 8 5 9 5kg cm2 G 120 135 P S I G Outsid...

Страница 29: ...raining and service purposes LGE Internal Use Only 4 Trouble Shooting 1 2 Way 3 Way Valve 29 2 Pumping Down 30 3 Balance Refrigerant of the three way valve 31 4 Evacuation 32 5 Gas Charging 33 6 Cycle Part 34 7 Self Diagnosis 35 8 Electronic Parts 38 4 Trouble Shooting ...

Страница 30: ...Open clockwise counter clockwise connected manifold gauge Open Open Open with charging cylinder Open Open Open with charging cylinder Open Open Open Open Works Shipping Air purging Installation Operation Pumping down Transfering Evacuation Servicing Gas charging Servicing Pressure check Servicing Gas releasing Servicing 1 2 3 4 5 6 Valve cap Open position Closed position Pin Service port Service p...

Страница 31: ... 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 6 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg cm2 g 7 Immediately set the 3 way valve to the closed position Do this quickly so that the gauge ends up in...

Страница 32: ...auge needle does not move approxima tely 5 minutes after turning off the vacuum pump 4 Disconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil becomes dirty or depleted replenish as needed Lo Open Open Vacuum pump 3 Way valve Outdoor unit Liquid side Indoor unit Gas side 3 Way valve OPEN OPEN Vacuum Gage 3 Evacuation All amount of refrigerant leaked 31 Copyright 2007...

Страница 33: ...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 4 Immediately disconnect the charge hose...

Страница 34: ... 4 Temperature difference between intake and discharge air depends on room air humidity When the room air humidity is relativery higher temperature difference is smaller When the room air humidity is relatively lower temperature difference is larger 2 Check temperature and pressure of refrigeration cycle 1 The suction pressure is usually 8 5 9 5kg cm G Cooling at normal condition R410A 2 The tempe...

Страница 35: ...door Operation O O O O O O O O O O O O O O O O Indoor Temp sensor error Sensor open or short Heat Sink sensor error Sensor open or short Heat Sink temp is over 95 Communication error Outdoor Temp sensor error Sensor open or short DC Peak error Over current error CT2 ON ON ON OFF SHUT DOWN SHUT DOWN 9times 9times 3 sec 10times 10times 3 sec 3 sec 3 sec 3 sec 3 sec 2times 10 ON Outdoor fan lock erro...

Страница 36: ...ode disappear when normal conditions are restored 2 Error Code 5 8 9 12 13 14 Keep displaying Error code although normal conditions are restored but error code disappears on restarting the unit 3 Error Code 6 7 Error code disappears when power reset Power Cord Off On CAUTION Precaution in Service or Check Even after stopping the operation of product it takes some time to discharge the remaining el...

Страница 37: ...nosis table Check the main power Yes Yes No No Unit Check Point Check the condition of connectors The condition of P C B pattern Check the condition of connectors The condition of P C B pattern The electronic components Indoor Outdoor Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for a repair Internal components and circuit boards are at main po...

Страница 38: ...he indoor unit Check the voltage of power supply AC220V AC240V 50Hz and check for the following The voltage of main power supply The voltage applied to the unit The connecting method of Indoor Outdoor connecting cable each color The P C B Assembly Fuse Noise Filter Power Module Bridge Diode etc Primarily the operating condition of Micom is O K Check Remote controller Receiver Check CN DISP1 CN DIS...

Страница 39: ...the mark is displayed in LCD screen replace battery No Check the contact point of CN DISP 1 2 connector Re connector Check display P C B Assembly Voltage between CN DISP1 should be DC 5V If problem still persists Replace display PCB 3 6 Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for a repair Internal components and circuit boards are at main ...

Страница 40: ...erly Yes No Sensing circuit of indoor unit PCB is operating properly Yes No Check Indoor TH Measure resistance of TH air about 10 kΩ at 25 C pipe about 5 kΩ at 25 C If it is not replace the thermistor Check soldering state of R01H R04H C01H C02H If it is broken replace indoor unit PCB The indoor unit PCB still has some problem Replace the indoor unit PCB Be sure to disconnect the power cable plug ...

Страница 41: ...g circuit of outdoor unit PCB is operating properly Yes No Check outdoor TH Measure resistance of TH air about 10kΩ at 25 C pipe about 5kΩ at 25 C If it is not replace the thermistor Check soldering state of R03H R06H C02H C03H If it is broken replace outdoor unit PCB The outdoor unit PCB still has some problem Replace outdoor unit PCB Be sure to disconnect the power cable plug from the plug socke...

Страница 42: ...g circuit of outdoor unit PCB is operating properly Yes No Check heat sink TH Measure resistance of TH about 10kΩ at 25 C If it is not replace the thermistor Check soldering state of R01H R02H C01H If it is broken replace outdoor unit PCB If Air circulation is poor this error may be caused It s normal to protect the component in very poor air circulation Be sure to disconnect the power cable plug ...

Страница 43: ... DC5V in outdoor unit PCB about DC 5V Yes No Check power connector Is not connected to the T Block in indoor unit Check FUSE NF01 02J PTC Power Module BD 01S in outdoor unit PCB assembly Communication circuit of indoor outdoor PCB Is operating properly Ground connection is installed power outlet or outdoor chassis Yes Install ground connection from outdoor unit In case power outlet has no earth po...

Страница 44: ...omponents in outdoor unit PCB assembly are working properly Is the compressor running Yes Check resistance No No Yes It s normal to protect the unit Some overload makes this error 1 1 2 3 4 5 2 Between U V V W U W port Short Open circuit Comp motor coil error normal 1 2Ω Between U V W and Body normal over10MΩ Short of SPM pins GND P U V W pin Direction of D01Z D03Z C08Z 10Z 12Z 16Z Assembling stat...

Страница 45: ...is problem Check refrigerant pressure and adjust Current sensing circuit is working properly Yes No It s normal to protect the unit Some overload may lead to this error Check current sensing circuit Check the Current Trans is damaged in outdoor unit PCB output wire is disconnected to pin or not Some component in the PCB is broken It makes this problem If problem still persists Replace the outdoor ...

Страница 46: ... fan motor with another normal PCB If the motor is rotate the PCB in the unit has problem Replace the PCB in indoor unit No Drive another motor with not replace If the motor is rotate The PCB is ok Replace the motor in indoor unit Is DC fan motor working properly CAUTION Before working please wait for some time to allow the capacitor to discharge fully Working on the equipment that is connected to...

Страница 47: ...te the fan motor with another normal PCB If the motor rotates the PCB in the unit has problem Replace the PCB in outdoor unit No Drive another motor with not replace If the motor is rotate The PCB is ok Replace the motor in outdoor unit Is DC fan motor working properly CAUTION Before working please wait for some time to allow the capacitor to discharge fully Working on the equipment that is connec...

Страница 48: ...ng properly Yes No Is Sensing circuit of outdoor unit PCB working properly Yes No Check D_PIPE TH Measure resistance of TH about 200kΩ at 25 C Check soldering state of R07H R08H C04H It s normal to protect the unit when the discharge pipe temp is high in the range of 100 110 C depens on model Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for a r...

Страница 49: ...P NO MFL36547601 JAN 2008 ...

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