LG LAU095HV Svc Manual

General wall mounted-inverter type

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LAKEWOOD LAU095HV

Owner's Manual

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LAU095HV

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Summary of Contents for LG LAU095HV

Page 1 This Owner's Manual is provided and hosted by Appliance Factory Parts. LAKEWOOD LAU095HV Owner's Manual Shop genuine replacement parts for LAKEWOOD LAU095HV Find Your LAKEWOOD Air Conditioner Parts - Select From 1 Models -------- Manual continues below --------...
Page 2 MODEL : General Wall Mounted-Inverter Type CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel. - 101 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 3 4. Gas Charging (After Evacuation) ................39 5. Cycle Troubleshooting Guide ..................40 6. Electric Parts Troubleshooting Guide ...............41 7. Self-diagnosis Function .....................46 - 2 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 4 Part 1 General Information 1. Safety Precautions ......................4 2. Nomenclature........................7 - 3 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 5 Do not turn the air-conditioner ON or OFF by plugging or unplugging the power plug. There is risk of fire or electrical shock. - 4 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 6 Be sure to turn off power switch before connecting or disconnecting connector, or parts damage may be occur. - 5 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 7 Check the drainage of the indoor unit after the repair. If drainage is faulty the water may enter the room and wet floor. - 6 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 8 Nano Plasma F+4Way+(A/changeove)+A/clean+Oxygen generator 4way+(Nano)Plasma F+Negative ion+A/Clean+Oxygen generator Dry contact Basic + Low A Serial No. LG Model Development Serial No. - 7 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 9 1. List of Controls & Functions ..................9 2. Basic Mode Controls......................10 3. Special Mode Controls....................12 4. Utility Functions ......................13 5. Protection Functions & Controls .................16 - 8 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 10 Oil Equalizing Control To protect compressor NOTE: The Exploded View SVC Manual has the particular Function table for each model. - 9 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 11 • While in defrost control, the indoor and outdoor fans are turned off. • Compressor 2minutes delay - After compressor off, the compressor can restart minimum 2 minutes later. - 10 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 12 Heating thermo off +0.5°C(+1°F) Setting Temp. Cooling thermo off -0.5°C(-1°F) Switching point -2°C(-4°F) Cooling Cooling Mode Heating operation operation operation - 11 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 13 • In this operation, before we feel cold the set temperature and air volume is set automatically to save energy. - 12 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 14 Cooling CYCLE 30 Min 13 Min 60 Sec 120 Sec Comp. Comp. Indoor Fan Setting Step Indoor Fan Setting Step - 13 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 15 (Setting temp. -0.5˚C(-1˚F)) Sleep time ( hour ) NOTE: Some Models are different by swing width and swing pattern. - 14 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 16 - State of operation ON/OFF - Operation mode/setting temp./selected airflow speed - Sleep timer mode/remaining time of sleep timer - Chaos Swing - 15 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 17 Comp. Step 4 3˚C(37.4˚F) Comp. Step 2 Comp. off T1: 0 ~ 2°C(32~35.6°F) NOTE: Some Models are different by T1. - 16 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 18 Heater-on conditions : Outdoor temp. ≤ 0˚C (32˚F) and heating mode Heater-out conditions : Outdoor temp. > 1˚C (34˚F) - 17 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 19 Indoor Super low speed Start ° low speed Pre-Heat Deice STEP Model (kBtu/h) Compressor Frequency 65Hz(Step 5) 80Hz(Step 5) - 18 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 20 2) Outdoor piping temperature is below than –6°C (21.2°F, Option) for starting defrosting operation. Defrosting Comp. Freqency Model (kBtu/h) Defrosting Comp. Frequency 90Hz 77Hz 90Hz - 19 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 21 5) Hot Gas bypass valve/Oil separator bypass valve make OFF after 75 seconds from the time of 30Hz. NOTE: Comp.frequency and EEV pulse is different each models. - 20 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 22 3. When the frequency changes, the rotation speed of the compressor changes resulting in an changed refrigerant circu- lation. This leads to changeable amount of the heat exchange per unit. - 21 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 23 Fc-2 Fc-1 Fc-2 Free Freq. T on : 85°C(185°F) (Model by Model) T off : 95°C(203°F) (Model by Model) - 22 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 24 If the temperature reached Toff condition system will count 5 times after that and system will stop with error code. Heat Sink temp Toff=85°C(185°F) T2=75°C(167°F) T1=70°C(158°F) 5 Hz 5 Hz COMP frequency frequency frequency Down Down - 23 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 25 • If CT2 occurs 5 times within one hour, the appliance turn off and displays ERROR CODE 7. Model CT 1 CT 1 CT 2 (kBtu/h) (Cooling) (Heating) 7.5A 7.5A - 24 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 26 If CT2 occurs 5 times in 1 hour,stop the operation and shows Error Code 22 Model CT 1 CT 1 CT 2 (kBtu/h) (Cooling) (Heating) 15.5A - 25 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 27 -13 °C(8.6°CF) COMP Freq. Free Fc-1 Fc-2 Fc-2 Fc-1 Free Fh min T off : 110°C(230°F) T2 : 100°C(212°F) - 26 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 28 D-Pipe temp Toff(105)°C(221°F) T2(95)°C(203)°F T1(90)°C(194)°F 5 Hz 5 Hz COMP Down Down Expansion Stop control Pulse Up Pulse Up valve - 27 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 29 System will stop if this situation occurs 5 times in 1 hour and error code will be generated (Error Code 33). Toff(105)°C(221)°F D-Pipe temp T2(95)°C(203)°F T1(90)°C(194)°F COMP Step On-time On time Expansion Stop Pulse valve control control - 28 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 30 O/D fan Set speed Set speed Set speed Model T1 [˚C(˚F)] T2 [˚C(˚F)] 18kBtu/h 18(64) 24kBtu/h 16(61) 30kBtu/h 0(32) - 29 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 31 3) During this operation,if operating Hz couldn’t be changed by safety control ,stop this operation. Operating process : Raise the operating HZ up to 70,and after 20 sec.(option) recover to the last value. - 30 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 32 Part 3 Test Run 1. Check before Test Run....................32 2. Test Run Flow chart .......................33 3. Test Run Detail........................34 - 31 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 33 2.0 MΩ as a result of refrigerant accumulation in the internal compressor. If the insulation resistance is less than 2.0 MΩ, turn on the main power supply. - 32 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 34 Refer to Troubleshooting After Hot Start Guide Normal NOTE: When outdoor temperature is low,the unit is operated to Heating mode - 33 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 35 The pressure of the gas side Refrigerant TEMP. service valve. 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.) - 34 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 36 4. Gas Charging (After Evacuation) .................39 5. Cycle Troubleshooting Guide..................40 6. Electronic Parts Troubleshooting Guide ..............41 7. Self-diagnosis Function....................46 - 35 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 37 Open Pressure check (with charging cylinder) Open Open (Servicing) Open Gas releasing (with charging cylinder) Open Open (Servicing) - 36 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 38 – 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. - 37 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 39 (4) Disconnect the charge hose from the vacuum pump. – Vacuum pump oil. If the vacuum pump oil becomes dirty or depleted, replenish as needed. - 38 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 41 When the room air humidity is relatively lower temperature difference is larger. - 40 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 42 Replace the P.C.B. 2) The output voltage of Power : 15V Module (SMPS) 3) IC01D(LD1085), IC04D(7805) : DC 5V - 41 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 43 : DC +5V Check point • Check the connecting circuit between MICOM PIN and CN-DISP1 PIN • Check receiver ass'y - 42 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 44 Check the electrical wiring diagram of Outdoor side. Check the open or short of connecting wires between Indoor and Outdoor. - 43 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 45 Check the electrical wiring diagram of Outdoor side. Check the open or short of connecting wires between Indoor and Outdoor. - 44 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 46 The voltage of Pin No 1(orange) and 3(black) of CN-FAN. About AC 160V over About AC 50V over SSR is not damaged Check SSR - 45 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 47 (BLDC fan model only) 3 sec 10 times 10 times • D-Pipe TH. is short or open. 3 sec (4 LED Model) - 46 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 48 8 times Discharge Pipe Temp. High (INV) 3 times 2 times Discharge Pipe Temp. High (Cons.) 3 times 3 times - 47 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 49 6 times 2 times Heat sink temp. high Heat sink sensor (open/ short) 6 times 5 times Open / Short - 48 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 50 R03H ~ R06H, C02H, C03H (air : about 10kΩ at 25°C(77°F), pipe : about 5kΩ at 25°C(77°F) - 49 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 51 9k,12kBtu/h Model Heat-sink Thermistor resistans check R-T Graph Ω 20 30 40 50 60 70 80 90 100110 120 130 Temperature[˚C] - 50 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 52 Check IC01K, IC02K,D01K~D03K, Install ground connection from outdoor ZD01K~ZD03K, R01K~R10K, unit. (In case power outlet has no earth port) C01K~C04K - 51 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 53 Assembling state of screw between INV-IC & ¡ normal : over 10MΩ Heat-sink DC 15V output of Power module. Ω - 52 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 54 (refer marking on pcb and component) - Spec of R01N (1kΩ), R02N (1.65kΩ) is correct - Direction of diode (D01N, D02N) is right - 53 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 55 (Soldering state & Direction) - remove obstacles in connected to outdoor pcb - R01F~R05F, C01F~C03F, outdoor unit assembly (CN-FAN2) Q01F~Q04F, ZD01F - 54 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 56 - Check soldering state of - Measure resistance of TH. in outdoor pcb assembly R07H, R08H, C04H (about 200kΩ at 25°C(77°F)). - 55 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 57 8. If the resistance of the sensor is 0 or 5VDC, then sensor is abnormal. ¡ Repair or Change the PCB. - 56 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 58 ¡ Check the another indoor unit. * CH05 is displayed at indoor unit, CH53 is displayed at out- door unit. - 57 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 59 5. Check the insulation from water at IPM part. ¡ Check the trace of water. 6. Check the IPM circuit. - 58 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 60 2. Check the fan operation is right. 3. Check the current. 4. Check the install condition. 5. Check the internal circuit. - 59 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 61 • Check the DC Link Voltage. Check Point 1. Check the power source. 2. Check the DC Link Voltage. - 60 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 62 2. Check the install condition for over load. (Trans1, B/Diode, Diode, Resistance) 3. Check the SVC V/V open. 4. Check the leakage of refrigerant. - 61 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 63 Check the connection of "U, V, W" Check the short check point "A" Check with the error code "21" - 62 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 64 1. If the resistance of the sensor is only , the check Is possible. 2 If the error occurs again after the reset , change the PCB. - 63 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 65 3. If the resistance of the sensor is 0 kΩ or ∞, then sensor is abnormal. Ω If the voltage of the sensor is 0 V or 5VDC, then sensor is abnormal. - 64 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 66 • Check the poor soldering. Check Point • CH 60 1. Check the insertion condition of EEPROM. 2. Check the poor soldering - 65 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 67 1. Check the install condition for over load. (Refrigerant, Pipe length, Blocked, …) 2. Check the Outdoor temp. is very high. - 66 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

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