LG THERMA V AHUW166T3 Service Manual
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LG THERMA V AHUW166T3 Service Manual

LG THERMA V AHUW166T3 Service Manual

Air-to-water heat pump
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CONFIDENTIAL
AIR-TO-WATER HEAT PUMP
SERVICE MANUAL
(Exploded View)
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.

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Summary of Contents for LG THERMA V AHUW166T3

  • Page 1 AIR-TO-WATER HEAT PUMP SERVICE MANUAL (Exploded View) CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel. Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 2: Table Of Contents

    3. Functions ..................9 4. Components................11 5. Cycle Diagrams ................15 6. Piping Diagrams .................16 7. Wiring Diagrams .................18 8. Exploded View ................21 - 2 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 3: Model Information

    - Additional Information : Serial number refers to the barcode on the product. - Max allowable pressure High side : 4.2 MPa / Low side : 2.4 MPa - Refrigerant : R410A, R134a - 3 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 4: Model Name And Related Information

    220-240 V~ 50 Hz *1 : tested under EN 14511 Heating condition (water out temperature 35°C at outdoor ambient temperature 7°C / 6°C) - 4 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 5: Specification

    4 750 20.2 x cores 4.0 x 3 (H07RN-F) Wiring Connections Communication Cable (included Earth) x cores 1.0~1.5 x 2 (VCTF-SB) - 5 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 6 • Sound Pressure Level : Calculated value according to distance of sound power. * At least 25A circuit breaker can be used. - 6 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 7 • Sound Pressure Level : Calculated value according to distance of sound power. * At least 25A circuit breaker can be used. - 7 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 8 • Sound Pressure Level : Calculated value according to distance of sound power. * DHW 55~80°C Operating is available only when the booster heater is operating. - 8 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 9: Functions

    Test function Wiring Error Check Peak Control Convenience Mode Lock Low noise operation Forced Cooling Operation (Outdoor Unit) Network function Network solution(LGAP) - 9 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 10 3. ** : ACP, AC Smart, ACP BACnet or ACP Lonworks is needed. 4. If you need more detail, please refer to the manual of product. (http://partner.lge.com/global : Home> Doc.Library> Product > Control(BECON))) - 10 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 11: Components

    Components 4. Components Indoor unit : External (unit : mm) - 11 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 12: Indoor Unit : Internal

    PCB and terminal blocks Flow Switch Minimum operation range at 15 LPM. Plate Heat Exchanger Heat exchange between refrigerant and water - 12 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 13: Outdoor Unit : External

    Capacity : 16 kW U60A Chassis (unit : mm) Supporter Description Name Liquid-side Service Valve Gas-side Service Valve Air discharge Grill - 13 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 14 PCB and terminal blocks. Power and Communication Cable Hole Connect to terminal blocks. Pipe Routing Hole The pipes can be connectable in three directions. - 14 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 15: Cycle Diagrams

    Ø 9.52 High Pressure Sensor Low Pressure Sensor Charging Port Discharge Temperature Sensor Liquid Pipe Temperature Sensor Inverter Compressor Accumulator Strainer - 15 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 16: Wiring Diagrams

    Wiring Diagrams 7. Wiring Diagrams Indoor Unit - 16 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 17 Wiring Diagrams Outdoor Unit(Including field wiring) - 17 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 18 Outdoor PCB SW04C SW03C SW02C SW01C SW01D SC_EEV MAIN_EEV VI_EEV P_SEN_L P_SEN_H COMP_SW SC_OUT/LIQUID SUCTION/HEX/ DISCHARGE AC_INPUT CN_INV HEATER 4WAY BYPASS HOTGAS - 18 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 19 135500 249951 261704 346811 137213B W6631 137213A W6200 W6640A W6640B 268711E 268711G W6640C 35211A 268711C 268711F 268711B 561410 268711D 137213C 552204 165000B 165000A W4810B 552209 W4986B 340090 W4986A 135511 165020 554160 137211 550140 HNPS12 267110 263230B 263230D 263230E 237204 263230C 130411...
  • Page 20 649950 268711D 261704 268711C 268711E 268711G 268711B W6200 W6640 263230B 263230A...
  • Page 21 237204 435512 435300 554031 549610 546810A 352119 237202 559010 237205 546810B 447910 430410 135500 137213 437212 435301 550140B 435513 437211...

  • Page 22: Exploded View

    Outdoor Unit 552116 552209 W37400 561410B 561410A 165000B 552202 W4986B 148000 W4986A 552203A W6631 552203B 552204 548490 165000A 554160 552111 552115 550140A - 22 - Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 23 P/NO : MFL67212914 Copyright © 2019 - 2021 LG Electronics Inc. All rights reserved. Only training and service purposes.

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