hit counter code
LG AMNW07GDBL1 Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Air Conditioner
  5. AMNW07GDBL1
  6. Service manual
LG AMNW07GDBL1 Service Manual

LG AMNW07GDBL1 Service Manual

Lg multi-inverter type air conditioner svc manual(general)
Hide thumbs Also See for AMNW07GDBL1:
Table of Contents

Advertisement

Quick Links

See also: User Manual , Installation Manual
Internal Use Only
http://biz.lgservice.com
Multi Air Conditioner
SVC MANUAL(General)
MODEL : Multi-Inverter Type
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.

Advertisement

Table of Contents
loading

Related Manuals for LG AMNW07GDBL1

Summary of Contents for LG AMNW07GDBL1

  • Page 1 Internal Use Only http://biz.lgservice.com Multi Air Conditioner SVC MANUAL(General) MODEL : Multi-Inverter Type CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

  • Page 2: Table Of Contents

    4. Gas Charging ......................43 5. Cycle Part ......................44 6. Electronic Parts....................45 Part 6 Service Order.........................110 1. PCB Service Order ....................111 - 1 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Part 1 General Information

    Part 1 General Information 1. Safety Precautions ......................3 2. Model Line Up ........................6 3. Nomenclature........................9 - 2 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 4: Safety Precautions

    Do not turn the air-conditioner ON or OFF by plugging or unplugging the power plug. There is risk of fire or electrical shock. - 3 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. - 4 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 6 Check the drainage of the indoor unit after the repair. If drainage is faulty the water to enter the room and wet floor. - 5 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 7: Model Line Up

    * Indicates color of panel – ART COOL : Gold(G), White Silver(H), Blue(B), Gallery(1) ART COOL Mirror : Mirror(R), Silver(V), White(W) - 6 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 8: Outdoor Units

    No. of connectable indoor units (Min. ~ Max.) 2 ~ 8 Total capacity index of connectable indoor units Power supply 208/230V, 1Ø, 60Hz Chassis - 7 - Copyright ©2012 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 To BD unit Ø9.52 (3/8) To ODU To ODU Ø9.52 (3/8) Ø19.05 (3/4) PMBL5620 MULTI Branch Ø19.05 (3/4) Ø9.52 (3/8) - 8 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 10: Nomenclature

    Indicates that this is multi system outdoor unit using R410A Ex) A4U : Connectable max. 4 indoor units A9U : Connectable max. 9 indoor units - 9 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 “36” mean that 5k~24k Indoor unit connected to BD unit BD : Branch distributor M : Multi system outdoor unit P : Parts - 10 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: Part 2 Functions & Controls

    7. Special Function & KIT ....................26 7.1 Low Ambient control....................26 7.2 Space Control ......................26 7.3 Auto Elevation Grille....................26 7.4 Defrost Control(Heating) .....................28 - 11 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: List Of Functions & Accessory

    Accessory model name : Installed at field, ordered and purchased separately by the corresponding model name, sup- plied with separate package. - 12 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 PQNFB17B0 Y branch Accessory Installation Header branch Accessory Air Guide ODU Dry Contact Low Ambient Kit O (Logical operation) - 13 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Air Flow

    Mode7 Mode6 Mode5 Mode4 Mode3 7~8° Mode2 OPEN NOTE: Some Models are different by swing width and swing pattern. - 14 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Air Flow Step

    After one minute, it is opposite. Vane 1 Vane 3 Vane 4 • Comparison of Air Flow Types 4-Open (conventional) Swirl Swing (New) - 15 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 17: Air Purifying

    Dust electrode discharge Dust particles Photo-Catalyst Coated Mesh Ionizer +4.8KV discharge Polluted Air Purified fresh Air Generating plasma Odour Odour molecule - 16 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 18: Installation Functions

    E.S.P value of previous air flow rate will be maintained by remembering the E.S.P value prior to the shift. - 17 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Reliability

    Compressor OFF Temp. ➔ Setting Temp-0.5°C • In 10-min dehumidification operation, the indoor fan operates with the low airflow speed. - 18 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 20: Convenience Functions & Controls

    Thermo ON : Setting temp. Thermo OFF : +4 °C above setting temp. Thermo OFF : +3 °C above setting temp. - 19 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 21: Auto Cleaning Operation

    • While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature. - 20 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 22: Auto Restart Operation

    Memorized condition are on / off condition, operating mode (cooling/ heating), set temperature and fan speed. The unit will memorize the above conditions and start with same memorized condition. - 21 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 23: Child Lock Function

    - The operation will be started if the ON/OFF button is pressed. - If you want to stop operation, re-press the button. - 22 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 24: Group Control

    • When controlling in groups, set the master/slaver of the remote controller. Refer to Installer setting section on how to set mas- ter/slave for more detail. - 23 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 25: Sleep Timer Operation

    Operation Time Table (Example) Setting Temp. 25°C 25°C 25°C 25°C 25°C 09:00 08:00 09:00 08:00 09:00 12:00 17:00 12:00 12:00 12:00 - 24 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 26: Two Thermistor Control

    Operation of lower temperature by comparing indoor unit's and wired remote Heating controller's temperature. ❈ The function of 2TH has different operation characteristics according to the product. - 25 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 27: Special Function & Kit

    3.1 m. So it enables to install the Indoor unit at high ceiling space. And Auto Elevation Grille makes you cleaning the filter easily. - 26 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 • In case when obstacle such as curtain hides the signal reception part of receiver in between the space interval, Remote Controller operation is infeasible. - 27 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 29: Defrost Control(Heating)

    • The second defrost starts only when the outdoor pipe temperature falls below – 6°C after from ending of the first defrost and more than 10 minutes operation of compressor. - 28 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 30: Part 3 Basic Control

    6.1 High pressure protection control ................32 6.2 Low pressure protection control ................32 6.3 Discharge temperature control ................32 6.4 Input Current control ...................32 - 29 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 31: Normal Operation

    EEV operates with PI control rules to keep the degree of superheat at the evaporator inlet and outlet status. - 30 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 32: Oil Return Control

    Setting value Min. Pulse 4 way valve Indoor unit Component Starting Running Ending Normal control Normal control Oil return signal - 31 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 33: Protection Control

    14A or less Over than 14A ❈ Remarks: The data of pressure and frequency are different model by model. - 32 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 34: Part 4 Test Run

    Part 4. Test Run 1. Check before Test Run.....................34 2. Test Run Flow chart ......................35 3. Test Running ........................36 - 33 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 35: Check Before Test Run

    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. - 34 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 36: Test Run Flow Chart

    Guide Normal • Each indoor unit should be tested. • If the unit has accessory, it should be tested. - 35 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 37: Test Running

    ■ In the case when the vibration of the unit is conveyed to the hose, secure the unit with an anti-vibration rubber. Discharge temperature - 36 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 38: Ceiling Cassette Type

    ❏ Aren't terminal screws loosened? (refrigerant and drain piping)? ❏ Is there any leakage of refrigerant? M4..118N.cm{12kgf.cm} M5..196N.cm{20kgf.cm} M6..245N.cm{25kgf.cm} M8..588N.cm{60kgf.cm} - 37 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 39: Part 5 Trouble Shooting Guide

    6.4 When indoor Fan does not operate................48 6.5 When the louver does not operate................49 6.6 Troubleshooting Indoor Error ..................50 6.7 Troubleshooting Outdoor Error ...................56 - 38 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 40: Self-Diagnosis Function

    Communcation error between in and out Indoor Out-Piping sensor error Differnt mode operation EEPROM Check Sum Error Indoor BLDC Fan Lock - 39 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 41: Error Indicator (Outdoor)

    7times ◑ 3times ◑ Over Current of Outdoor Unit PFC PFC Fault Error(S/W) ◑ : A light on the display panel is blink. - 40 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 42: Pump Down

    4. Pump Down can be stopped (The compressor is turned off), because of compressor protection. In this case, reset the power. - 41 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 43: Evacuation

    Oxygen and do not use Flammable gases. pump). Otherwise, it may cause fire or explosion. - Otherwise, it may cause personal injury. - 42 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 44: Gas Charging

    - Any presence of foreign substance such as air repeat the procedure (pumping down-pin). can cause an abnormal pressure rise and may result in explosion or injury. - 43 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 45: Cycle Part

    2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. - 44 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 46: Electronic Parts

    4) Replace PCB Assembly 5) IC01A(KIA7036) 5) The voltage of micom pin 19 5) Replace PCB Assembly : DC4.5V↑ - 45 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 47: The Product Doesn't Operate With The Remote Controller

    * Check display PCB Assembly - Voltage between CN-DISP1 should be DC +5V, - If problem still persists, Replace display PCB - 46 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 48: The Compressor/Outdoor Fan Are Don't Operate

    Check the electrical wiring diagram of Outdoor side. Check the open or short of connecting wires between Indoor and Outdoor. - 47 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 49: When Indoor Fan Does Not Operate

    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 - 48 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 50: When The Louver Does Not Operate

    If there are no problems after above checks. • Confirm the assembly condition that are catching and interfering parts in the link of the vertical louver - 49 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 51: Troubleshooting Indoor Error

    8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. → Repair or Change the PCB. - 50 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 52 3. Check the volt. Of main PCB power source. (DC 12V) → Repair or Change the main PCB. 4. Check the installation of wired remote controller. (Noise interference) → Adjust the state of installation - 51 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 3. Check the level of water 4. Check the volt. Of Drain pump power supply. (AC 230V) → Repair or Change the main PCB. - 52 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 54 Press the on/off button or mode change button and matching the indoor unit mode same as the first operated indoor unit - 53 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 55 2. If the EEPROM value & the Program value are not matched, the Code is Displayed 3. After Checking the connection and Insertion, replace the PCB or Option PCB - 54 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 56 → Check Red line to Black line, Blue line to Black line → The resistance should infinite → replace the motor - 55 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 57: Troubleshooting Outdoor Error

    • Check outdoor fan constraint / screened / flow (Outdoor fan constraint, structure screened, blocked) • Check if IPM burned • Burned parts inside PCB - 56 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 58 1MΩ ↑ U - chassis 1MΩ ↑ V - chassis 1MΩ ↑ W - chassis [IPM Position & Pin number] - 57 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 59 5V_GND 5V_GND 5V_GND DC_LINK - 58 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 60 5V_GND 5V_GND 5V_GND DC_LINK Recheck power and installation condition - 59 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 61 → wiring again if abnormality found Replace main PCB assembly. Monitoring PCB LED display error Recheck power and installation condition - 60 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 62 5V_GND 5V_GND 5V_GND DC_LINK Recheck power and installation condition - 61 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 63 100Ω • Remedy : replace PCB Assembly. Recheck power and installation condition - 62 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 64 5V_GND 5V_GND 5V_GND Comp_Current Recheck power and installation condition - 63 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 65 CN- DISCHARGE (BLACK 3Pin Connector) Replace the Thermistor - 64 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 66 (Notice: it is not full ice forming of strainer, in case that there is installation conditions not at inlet portion but at outlet portion) - 65 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 67 • Remedy : remove cause of error Recheck power and installation condition 5V_GND 5V_GND 5V_GND 5V_GND 5V_GND 5V_GND Comp_Current Input_I - 66 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 68 • Remedy : remove cause of error Recheck power and installation condition Main PCB Connector PCB Suction pipe connector D-pipe sensor connector - 67 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 69 PCB correctly? After replacement of outdoor unit main PCB is the system also abnormal? Replace corresponding pressure sensor - 68 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 70 Max.single indoor unit capacity A2UW18GFA0 A3UW24GFA0 Check Point • CH 51 1. Check the indoor unit capacity. 2. Check the combination table. - 69 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 71 Recheck power and installation condition - 70 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 72 1. Check the consistency of the EEPROM s direction inserted in the PCB and the EEPROM marking. <EEPROM Direction Check Point> - 71 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 73 CN- C/PIPE (Violet 3Pin Connector) Replace the Thermistor - 72 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 74 ? • Replace main PCBA it abnormality found Recheck installation condition and connection of Heat sink - 73 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 75 ? • Replace main PCBA it abnormality found Recheck installation condition and connection of Heat sink - 74 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 76 1. Check voltage between 1pin and 4pin of Fan Mortor connector (Tester diode mode) 2. Voltage value should be in 1V ±0.2V. - 75 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 77 Comp pipe Resistance(Ω) at 20°C Constant Inverter Terminal comp. comp. U-GND 2MΩ 2MΩ V-GND 2MΩ 2MΩ W-GND 2MΩ 2MΩ - 76 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 78 23 22 21 0.4 ~ 0.6 V 0.4 ~ 0.6 V PFC_IPM check U, V, W R S T - 77 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 79 23 22 21 0.4 ~ 0.6 V 0.4 ~ 0.6 V PFC_IPM check U, V, W R S T - 78 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 80 Check inverter PCB assembly IPM normality Is inverter PCB assembly → Replace inverter PCB assembly normal? Recheck power and installation condition - 79 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 81 (54k - Check output pin 1.2 of the CT Sensor : 5V ) IN/I Black <CT Sensing Check Point> < Inverter PCB> <CT Sensing Check Point> - 80 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 82 Power connection normal? Inverter PCB assembly CN(L), CN(N) Replace inverter PCB assembly Is Inverter PCB Normal? Recheck power and installation condition - 81 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 83 3. Check the DC Link voltage at Comp operating(340V↑) 4. Check DC Link Sensing Signal :2.4~2.8V (Refer the Picture) ■ 36k IN/I Black <CT Sensing Check Point> - 82 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 84 Part 5. Trouble Shooting < Inverter PCB> <DC Link Voltage Check Point> <Connection Check Point> DC_LINK DC_LINK DC_LINK <DC_LINK Sensing Check Point> - 83 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 85 1. Check the Input Voltage (L–N ➔ 230V±10%) 2. Check Input Voltage Sensor output voltage (2.5Vdc±10%) < Input Power Source Check Point > - 84 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 86 IN/I Black <CT Sensing Check Point> INPUT(V) INPUT(V) INPUT(V) < Input Voltage Sensing Check Point > < Inverter PCB> - 85 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 87 Is inverter PCB assembly normal? → Replace inverter PCB assembly Recheck power and installation condition U, V, W <CT Sensing Check Point> - 86 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 88 ③ Replace PCB assembly if it is short between pins except No.4,5 pins. CAUTION PFCM module No.4,5 pins are internal short state. <Short Check Point> - 87 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 89 Check inverter PCB assembly IPM normality Is inverter PCB assembly → Replace inverter PCB assembly normal? Recheck power and installation condition - 88 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 90 CN_TH3 (RED 4Pin Connector) - 89 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 91 (Notice: it is not full ice forming of strainer, in case that there is installation conditions not at inlet portion but at outlet portion) - 90 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 92 Upgrade Micom Program S/W Program normal? Replace inverter PCB assembly Is Inverter PCB assembly normal? Recheck power and installation condition - 91 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 93 1. Check the Input Voltage (L–N ➔ 230V±10%) 2. Check Input Voltage Sensor output voltage (2.5Vdc±10%) < Input Power Source Check Point > - 92 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 94 Part 5. Trouble Shooting IN/I Black <CT Sensing Check Point> INPUT(CT) INPUT(CT) INPUT(CT) < CT Sensing Check Point > < Inverter PCB> - 93 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 95 : Normal Value of the resistor is 5kΩ at 25℃ Condenser Out-pipe sensor : Normal Value of the resistor is 5kΩ at 25℃ - 94 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 96 PCB correctly? After replacement of outdoor unit main PCB is the system also abnormal? Replace corresponding pressure sensor - 95 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 97 Max.single indoor unit capacity A4UW36GFA0 A8UW54GFA0 Check Point • CH 51 1. Check the indoor unit capacity. 2. Check the combination table. - 96 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 98 1. In Case of CH53, Check the Connection → L,N at the terminal block CN-COMM CN-Power < MAIN PCB > < TERMINAL BLOCK > L1 L2 - 97 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 99 MAIN PCB assembly normal? Recheck power and installation condition Check Point - Check the EEPROM Check sum & Direction - 98 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 100 Part 5. Trouble Shooting <MAIN PCB> <Inverter PCB> <EEPROM Direction Check Point> - 99 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 101 CN- C/PIPE (Violet 3Pin Connector) Recheck power and installation condition - 100 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 102 2. Check resistance between No.24 pin and NO.25 pin of PCB PFC module - only 48/56k 3. Resistance value should be in 7kΩ ±10%.(at 25°C). - 101 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 103 Measuring resistance between No.19,20 pin PFCM : IPM : Measuring resistance Measuring resistance between No.19,20 pin between No.24,25 pin - 102 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 104 3. Resistance value should be in 7kΩ ±10%.(at 25°C). 4. Check the PFC Module No.19, 20 and IPM Module No.24, 25 pin soldering condition. - 103 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 105 A: PSCM /PFCM B: SPM PFCM : IPM : Measuring resistance Measuring resistance between No.19,20 pin between No.24,25 pin - 104 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 106 3. Do not replacing all of fan motor and PCB at once. Check error code again, after replacing the abnormal part (Fan Motor or PCB) first. - 105 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 107 Part 5. Trouble Shooting Check voltage betwen 1pin and 4pin of fan motor Fan motor connector Tester <Main PCB> <Inverter PCB> - 106 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 108 Is inverter PCB assembly Check inverter PCB assembly IPM normality normal? → Replace inverter PCB assembly Recheck power and installation condition - 107 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 109 < Noise Filter wiring Check Point > < Main PCB wiring Check Point > < Input Power Source Check Point > - 108 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 110 < Input Power Source Check Point > < Inverter PCB wiring Check Point > < Inverter PCB wiring Check Point > - 109 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 111: Part 6 Service Order

    Part 6. Service Order Part 6. Service Order 1. PCB Service Order ......................111 - 110 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 112: Pcb Service Order

    Tighten PCB Screws (6ea) Raise PCB and Re-wire terminal Assemble C/Box and Top Cover take terminals from PCB into a complete whole - 111 - Copyright ©2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 113 January, 2014 P/NO : MFL68280201...

This manual is also suitable for:

Amnw12gdbl1Lmn127hvtLmn077hvtAmnw15gdbl1Lmn157hvtAmnw18gdcl1 ... Show all

Table of Contents