LG AB-H1208VA0 Service Manual
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LG AB-H1208VA0 Service Manual

LG AB-H1208VA0 Service Manual

Large duct-type air conditioner
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LG Large Duct-Type
Air Conditioner
SERVICE MANUAL
MODELS: AB-H1208VA0

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Summary of Contents for LG AB-H1208VA0

  • Page 1 LG Large Duct-Type Air Conditioner SERVICE MANUAL MODELS: AB-H1208VA0...

  • Page 2: Table Of Contents

    Dimensions ..........................5 Wiring Diagram ........................6 Troubleshooting Guide ......................7 Features of Controller ......................24 Exploded View and Replacement Parts List ..............28 Model Number Nomenclature AB-H1208VA0 Development Sequence A: Basic Type Chassis Name V: BV Chassis Electric Standard (Volts / Freq. / Phase) 8: 380-415V, 50Hz, 3Ø...

  • Page 3: General Data

    General Data Indoor units Indoor unit type Ducted Type AB-H1208VA0 Model [B120AH SV0] Power supply Ø/V/Hz 3 / 380 - 415 / 50 Gross cooling capacity 34.3 Btu/h 117,000 Net cooling capacity 32.8 Btu/h 112,000 Heating capacity 38.1 Btu/h 130,000...

  • Page 4: Outdoor Units

    General Data Outdoor units AB-H1208VA0 Outdoor unit [B120AH SV0] Rated capacity Gross cooling 34.3 Btu/h 117,000 Net cooling 32.8 Btu/h 112,000 Heating 38.1 Btu/h 130,000 Rated input Cooling 14.5 Heating 12.5 Energy label Running current Cooling Heating Starting current Cooling...

  • Page 5: Dimensions

    Dimensions Model No.: AB-H1208VA0[B120 SV0] 1700 1. Indoor Unit 1600 1392.4 2. Outdoor Unit 1280 900(bolt hole) Air outlet inlet inlet Service Panel Knockout hole (For the control wiring, the power supply, refrigerant connecting pipe) Knockout hole (For the control wiring, the power supply,...

  • Page 6: Wiring Diagram

    Wiring Diagram 1. Indoor Unit REACTOR CN_POWER REACTOR1 REACTOR2 MAIN CN_U CN_V CN_W BLDC DRIVER INDOOR MOTOR CN_R CN_S CN_T CN_N CN_START CN_PWR NOISE FILTER FIRE ALARM FUSE REMOTE (600V,15A) CONTROLLER 1(R) 2(S) 3(T) 4(N) 5(C) NOTE BK:BLACK RD:RED FIELD WIRING BR:BROWN WH:WHITE OR:ORANGE...

  • Page 7: Troubleshooting Guide

    Troubleshooting Guide 1-1. General Information DC Link Volt. DC Link Volt Detector EEPROM On_board Rewrite U,V,W Output Communication Parts Hall Sensor Input Magnet Error Communication Voltage Input Current SMPS ENABLE On/Off Output Indicator (R,S,T,N) Detector - 7 -...
  • Page 8 Troubleshooting Guide - 8 -...
  • Page 9 Troubleshooting Guide 1. Error indicator • The function is to self-diagnosis air conditioner and express the troubles if there is any trouble. • Error mark is displayed on wired-remote controller and LED of outdoor unit control board. • If more than two troubles occur simultaneously, lower number of error code is first displayed. •...
  • Page 10 Troubleshooting Guide 2. Error indicator(Fan Board) When CH10 or CH15 error occurs, check error indication LED on fan borad. ❈ Fan board Error Ex) Error 21 (IPM fault) 2 Times 2 Times 2 Times LED01G (RED) 1 Sec. 1 Sec. 1 Sec.

  • Page 11: Control Parts

    Troubleshooting Guide 3. Control Parts 1) Troubleshooting CH10 • When CH10 error occurs , check error indication LED on FAN BOARD. Fan board Check point Title Cause of error Error LED • Mechanical Locking • The abnormal connection of Hall sensor •...
  • Page 12 Troubleshooting Guide In general, possible trouble is classified in two causes. The one is called Starting Failure which is caused from an electrical defect, and the other is Ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application. Unit runs but ineffective cooling Ineffective Cooling or Heating Check of cold (warm) air cir-...
  • Page 13 Troubleshooting Guide Fails to Start Check power source. Check of circuit breaker and fuse. Check control switch Check control switch. setting. Compressor only fails to Fan only fails to start. start. Electric heater is not energized Improper wiring. Drop of power voltage. Loose terminal connection.
  • Page 14 Troubleshooting Guide VOLTAGE LIMITS NAME PLATE RATING MINIMUM MAXIMUM 380 - 415 V 342 V 456 V 1. No cooling and heating operation performed 1) Both the blower and the compressor do not work WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Other parts except the •...
  • Page 15 Troubleshooting Guide 3) Only outdoor fan does not work WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Motor • Over-heated Check how it is insulated. Repair or replace it. • Wire short Electric Wiring Cut off of wiring Check it with a tester. Rewiring or repair.

  • Page 16: The Units Discontinue After The Operation Started

    Troubleshooting Guide 2. The Units discontinue after the operation started WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Wash it by means of Coil is dirty *1 Checking Outdoor coil something like chemical washing. Extract air by vacuum Air intruded into the In the event that In-condensable gas pump, then replenish...

  • Page 17: The Unit Is Working, But Not Cooling And Heating Sufficiently

    Troubleshooting Guide 3. The unit is working, but not cooling and heating sufficiently (Both blower and compressor are working) WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Load Much Cooling or Heating Heat load increased. Do necessary disposal Window or door has many load respectively.

  • Page 18: Electronic Parts Troubleshooting Guide

    Electronic parts Troubleshooting Guide Possible trouble 1 : The unit does not operate. 1. Check the Fuse. Is the input voltage of 2. Check the wiring of AC220V. transformer AC220V? Is the output voltage of 1. Exchange the transformer. transformer AC24V & AC13V? 2.
  • Page 19 Electronic parts Troubleshooting Guide Possible trouble 3 : Key input of remote-controller does not respond. 1. Check or repair Connector wiring. Is the connection between MAIN PCB and remote-controller 2. Exchange the Connector. correct? 1. Replace the pressed key. Is any key on the remote-controller 2.
  • Page 20 Electronic parts Troubleshooting Guide Possible trouble 5 : No cooling operation performed. Is the unit operating? 1. Press power ON/OFF button. 1. Press cooling operation key. Is the cooling mode? 2. After reenergizing power supply, press power "ON/OFF" button. 1. Set flowing. Set Temp.
  • Page 21 Electronic parts Troubleshooting Guide Possible trouble 6 : No heater operation performed. Is the heater operation? 1. Select heater operation mode. 1. Reconnetting power supply. Is the heater LCD "ON"? press Heater Key. 1. Set following. Set temp. > Room temp.? 'Set temp.
  • Page 22 Electronic parts Troubleshooting Guide Possible trouble 7 : No humidifier operation performed. 1. Press cooling or fan operation Is the indoor fan operation? or heater operation key. Is the HUMID LCD "ON"? 1. Press humidifier Key. Is the output 1. Check or exchange IC02D voltage of Micom's 3PIN on on the MAIN PCB.
  • Page 23 Electronic parts Troubleshooting Guide Possible trouble 8 : Indoor motor does not operate. Is the unit operating? 1. Press power ON/OFF button. 2. Reconnect the power supply. Is the output voltage of Micom's 10PIN on 1. Check or exchange IC01D, the MAIN PCB 5V? IC02D on the main PCB.

  • Page 24: Features Of Controller

    Features of Controller 1. Circuit Diagram of Indoor PCB - 24 -...
  • Page 25 2. Circuit Diagram of BLDC Driver - 25 -...
  • Page 26 3. Circuit Diagram of Outdoor PCB - 26 -...
  • Page 27 4. Error Mode & Corrective Method Cause of error Sensing condition of error Method of SVC Error mode Remark OPEN/SHORT of CH01 Room Temp .sen- OPEN/SHORT of CH02 Indoor Pipe sensor Communication Error between CH03 indoor PCB and Remote controller Communication Error between CH05...

  • Page 28: Exploded View And Replacement Parts List

    Exploded View and Replacement Parts List 1. Indoor Unit • Exploded View (AB-H1208VA0) 342800 349600 336610 344170-2 359012 344170-1 354210 349610 152302 268714-1 268714-2 WOFZZ 658740 330870 566001-1 W6200 249951 263230-4 267110 263230-5 263230-6 - 28 -...
  • Page 29 Exploded View and Replacement Parts List • Replacement Parts List AB-H1208VA0 PART No. LOCATION DESCRIPTION REMARK AB-H1208VA0 336610 HOUSING ASSEMBLY 3661A10031A 344170-1 ROTOR ASSEMBLY 4413A20001A 344170-2 STATOR ASSEMBLY 4417A20001B 349610 MOUNT ASSEMBLY, MOTOR 4961A10014A 359012 FAN ASSEMBLY, BLOWER 5835A20003G 349600...
  • Page 30 Exploded View and Replacement Parts List 2. Outdoor Unit • Exploded View (AB-H1208VA0) 435312 559010 549610 546810 554032-2 554032-4 554032-1 554032-3 649950 566001 W0CZZ 668711 W6920 552201-1 548490 561410 552201-2 552116 566000 552204 561411-1 554160-2 561411-2 552203-2 552203-1 561411-3 263230-2...
  • Page 31 Exploded View and Replacement Parts List • Replacement Parts List AB-H1208VA0 PART No. LOCATION DESCRIPTION REMARK AB-H1208VA0 559010 FAN ASSEMBLY, PROPELLER 5901A10029A 435312 GRILLE ASSEMBLY, DISCHARGE 3531A20211F 546810 MOTOR ASSEMBLY, OUTDOOR 4681A10014H 549610 MOUNT ASSEMBLY, MOTOR 4960A10022A 649950 CONTROL BOX ASSEMBLY...
  • Page 32 June, 2006 P/No.: 3828A20845A Printed in Korea...

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