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LG LBNG3061YL Service Manual
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LG LBNG3061YL Service Manual

LG LBNG3061YL Service Manual

Ceiling duct air conditioner
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Internal Use Only
http://biz.lgservice.com
Ceiling Duct Air Conditioner
SVC MANUAL(Exploded View)
MODEL : LBNG3061YL
MODEL :
LBUG3061YL
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.

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  • Page 1 Internal Use Only http://biz.lgservice.com Ceiling Duct Air Conditioner SVC MANUAL(Exploded View) MODEL : LBNG3061YL MODEL : LBUG3061YL CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

  • Page 2: Table Of Contents

    Optional Operation ........................25 Cycle ............................27 Cycle Troubleshooting Guide ....................30 Electronic Parts Troubleshooting Guide ................31 Electronic Control Device .....................44 Exploded View ........................48 - 2 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Functions

    High head height Drain pump(Optional) Central Control(Optional) Group Control(Optional Wiring) PLASMA (Optional) Telephone Control Operation (Optional) Radio Frequency Control Operation(Optional) - 3 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 4: Outdoor Unit

    • It is only operated in the heating operation mode except defrosting operation. Outdoor fan motor control • High speed/Low speed Discharge pipe temp. control Overpressure protection - 4 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 5: Remote Controller

    Program Week Holiday SET/CLR Hour Fan Operation Mode : Fan Operates without cooling & heating Phase Control Setting Timer - 5 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 6: Product Specifications (Cooling & Heating)

    Tele Control(Optional) Optional PLASMA(Optional) 1/4(6.35) Connecting Pipe Liquid Inch 5/8(15.88) (mm) 1180*450*298 Dimension Indoor 870*320*800 Outdoor (WxDxH) Indoor Weight Outdoor - 6 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 7: Dimensions

    Dimensions (1) Indoor Unit MODEL LBNG3061YL W(mm) 1180 H(mm) D(mm) (2) Outdoor Unit MODEL LBUG3061YL W(mm) H(mm) D(mm) - 7 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 8: Refrigeration Cycle Diagram

    • If it is installed at a distance of 15m, 300g of refrigerant should be added (15-7.5) x 40g = 300g - 8 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Wiring Diagram

    SENSOR NOISE (RD) POWER-IN FILTER GN/YL 1(L) 2(N) 1(L) 2(N) TO INDOOR UNIT MAIN POWER 1Ø, 220~240V, 50Hz 3854A20179X - 9 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 10: Operation Details

    More than More than 3 minutes 3 minutes Selected Selected Selected INDOOR FAN fan speed fan speed fan speed COMPRESSOR - 10 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 • The operation diagram is as following. PIPING 1min TEMPERATURE 31°C 28°C INDOOR FAN COMPRESSOR : Selected Fan : Low Fan : Fan Stop - 11 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: Defrost Control

    DC Low voltage error CH 11 High pressure switch or instantaneous power failure CH 14 Discharge pipe temperature overheating - 12 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Installation Of Indoor, Outdoor Unit

    • Capacity is based on standard length and maximun allowance length is on the basis of reliability. • Improper refrigerant charge may result in abnormal cycle. - 13 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 14: Installation Of Indoor, Outdoor Unit

    4. Avoid places where sulfurous acid gas or corrosive gas is generated. 5. Avoid places near high frequency generators. - 14 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: The Indoor Unit Installation

    • If the remote controller cord is secured to the wall, provide a trap at the top of the cord to prevent water droplets from running. - 15 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Wired Remote Control Installation

    Re-attach the cover. going to be used for some long time. • Slide it back into position. - 16 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 17: Connecting Cables Between Indoor Unit And Outdoor Unit

    4) In Australia, the length of power supply cord measured from the entry of the power supply cord to the middle of live pin on the power plug should be over 1.8m. - 17 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 18: Indoor Unit

    Cover control ※ Please check !! Connecting cable Power cord - 18 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Connecting Pipes To The Indoor Unit

    If flare is noted to be defective, cut off the flared section and do flaring work again. Inclined Surface Cracked Uneven damaged thickness Even length all round - 19 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 20: Piping Connection

    1.8kg . m Ø6.35mm 4.0kg . m Ø9.52mm 5.5kg . m Ø12.7mm 6.6kg . m Ø15.88mm 6.6kg . m Ø19.05mm - 20 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 A ≥ 70mm a water leakage caused by the blocking B ≥ 40mm of intake air filter. C ≥ 20mm - 21 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 22: Refrigerant Pipe

    Connecting cable Tape • Insulate and tape both the gas piping and liquid piping. Liquid pipe Gas pipe Thermal insulator - 22 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 23: Test Running

    M4...118N . cm{12kgf . cm} M5...196N . cm{20kgf . cm} M6...245N . cm{25kgf . cm} M8...588N . cm{60kgf . cm} - 23 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 • Vibration of a magnetic switch, damage on the contact point there of, fuse breaking, disturbance to the normal function of a overload protection device. • Proper starting power is not given to the compressor. - 24 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 25: Optional Operation

    • To control the room temperature by a wired remote controller, install controller(room temp. sensor) to sense the temperature more accurately. • Maunfactured in the position 1. - 25 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 • Move S/W GR to "Group" position. • Check the line color of the wire. [Table. 1] Static Pressure(mmAq) Model Name Step(Hi/Med/Lo) Airflow (CMM) LB-G3061YL - 26 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 27: Cycle

    (9) Open the liquid side completely first and then the whether pipe connection is ok or not. gas side fully in order. - 27 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 (5) After the needle of gage indicates below 0 kgf/cm , close the valve of gas side quickly and turn off the power. - 28 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 29: Gas Charging

    1 minute and then repeat the procedure. - 29 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 30: Cycle Troubleshooting Guide

    2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. - 30 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 31: Electronic Parts Troubleshooting Guide

    Is Q01C operated� Exchange Q01C. normally? Is the SSR any problem? Exchange Triac. Check the fan motor� and connector.(CN-MOTOR) - 31 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 Power Auto shutdown. Change the main PCB Is the Voltage DC 5V Between� L02K, J09? Change the wired Remocon. - 32 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 4) Replace IC02D. 4) IC02D(7805) 5) The voltage of micom pin 29 5) Replace IC01A. 5) IC01A(KIA7036) : DC4.5V↑ - 33 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 Check the electrical wiring diagram of Outdoor side. Check the open or short of connecting wires between Indoor and Outdoor. - 34 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 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 - 35 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 PCB Ass'y about AC220V / 240V ? Is the operation of outdoor Ass'y right? Replace the parts. (IC04D, IC01A) Replace the PCB Ass'y. - 36 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 CN-TH OPEN/SHORT • Enable to receive remote singnal. • Malfunctions UP/DOWN step motor. CN-U/D OPEN • Don't operate louver. - 37 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38 • Check the PCB pattern(Resoldering). Replace the PCB Ass'y. • Main PCB Ass'y (Indoor/Outdoor) - 38 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 Supply the refrigerant Is the refrigerant pressure right? Replace the PCB Ass'y. • Main PCB Ass'y(Outdoor) • Control Box Ass'y(Outdoor) - 39 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 40 • Replace the Sub PCB Ass'y. Replace the PCB Ass'y. • Main PCB Ass'y • Sub PCB Ass'y • Control Box Ass'y - 40 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 Is the connecting state of wires in outdoor Check the electrical wiring diagram (Colors) unit? Replace the PCB Ass'y. • Main PCB Ass'y (Outdoor) - 41 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 42 Is the refrigerant pressure right? Remove or supply the refrigerant. Replace the PCB Ass'y. • Main PCB Ass'y (Outdoor) - 42 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43 • The operation LED blinks 8 times. • Malfunctions inverter circuit CN-Gate 1, 2 OPEN • The operation LED blink 9 times. - 43 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 44: Electronic Control Device

    Electronic Control Device 1. Indoor Unit MAIN P.C.B ASM - 44 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 45 2. Outdoor Unit • MAIN P.C.B ASM - 45 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 46: Schematic Diagram

    Schematic Diagram 1. Indoor Unit R06T R01T R02T R03T R04T R05T - 46 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 47 2. Outdoor Unit CN-GATE1 CN-GATE2 5 4 3 2 C10K 15uF,450V R21K 1M,1W C09K 471,250V RY-SV RY-4WAY RY-FAN_H RY-FAN_L RY-Power Magnet - 47 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 48: Exploded View

    137214 349600A 137213A W0CZZA 147901 137213B 263230A 263230B 267110A W3001 354210 249951 268711B 267110B 352114A 352118 437213B 330870 437213A - 48 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 2. Outdoor Unit • Models: LBUG3061YL - 49 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50 JULY, 2008 P/NO : 3828A20097R...

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