LG LW1223HRSM Svc Manual
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LG LW1223HRSM Svc Manual

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Room Air Conditioner
SVC MANUAL(Exploded View)
MODEL : LW1223HRSM
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED
unless you have obtained the prior written consent of the LG Electronics entity from which you received this
Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos
in this Service Manual.
Copyright © 2022-2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONFIDENTIAL

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Summary of Contents for LG LW1223HRSM

  • Page 1 Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual.

  • Page 2: Safety Precautions

    Always use the power plug and socket with loose socket. the ground terminal. • There is risk of fire or electric shock. • There is risk of electric shock. Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.
  • Page 3 Be sure the installation area does not deterio- rate with age. • If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and per- sonal injury. Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.
  • Page 4 If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire ● extinguishing equipment shall be available to hand. Have a dry powder or CO2 fire extinguisher adjacent to the charging area. Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.
  • Page 5 Ensure that seals or sealing materials have not degraded such that they no longer serve the purpose of ● preventing the ingress of flammable atmospheres. Replacement parts shall be in accordance with the manufacturer’s specifications. ● Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.
  • Page 6 OFN. The system shall be leak tested on completion of charging but prior to commissioning. A follow up leak test shall be carried out prior to leaving the site. Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.
  • Page 7 Only electric heating to the compressor body shall be employed to accelerate this process. When oil is drained from a system, it shall be carried out safely. Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.

  • Page 8: Product Specifications

    Depth (in) (kg) Net Weight (lb) (kg) Gross Weight (lb) Stuffing 40FTH Remote Control P/No AKB73016019 NOTICE SPECIFICATIONS ARE SUBJECT TO MINOR CHANGE WITHOUT NOTICE FOR FURTHER IMPROVEMENT. Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.

  • Page 9: Mechanical Parts

    (Refer to the circuit diagram found on page 16 in this EN ER GY He at SA VE R M O DE manual and on the control box.) Figure 3 Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.

  • Page 10: Air Handling Parts

    5. Remove the clamp that secures the fan. 6. Remove the fan. (See Figure 7) 7. Re-install the components by referring to the removal procedure, above. Figure 7 Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.

  • Page 11: Electrical Parts

    5. Remove the 3 nuts and the 3 washers that fasten the compressor. 6. Remove the compressor. (See Figure 10) 7. Re-install the components by referring to the removal procedure, above. Figure 10 Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.
  • Page 12 4. Disconnect all the leads of the synchronous motor. 5. Remove the 2 screws which fasten the synchronous motor. (See Fig. 14) 6. Re-install the components by referring to the removal procedure, above. Figure 14 Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.

  • Page 13: Refrigerating Cycle

    Freon™ Recovery System, Figure 17 unbraze the interconnecting tube at the capillary tube. 3. Remove the capillary tube. 4. Re-install the components by referring to the removal procedure, above. Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.
  • Page 14 3) Open valve A and allow the proper charge to enter the system. Valve B is still closed. 4) If more charge is required, the high-side will not take it. Close valve A. Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.
  • Page 15 Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pin-off tool capable of making a leak-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve. Figure 18B-Charging Figure 18A-Pulling Vacuum Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.

  • Page 16: Wiring Diagram

    *MEZ65238821* * This function can be optional or factory installed depending on the application model. CN-CC CN-DISPLAY CN-TH1 RY-HEATER(BK) RY-HEATER(BK(RD)) CN-E/H CN-FAN CN-SIGNAL RY-COMP(BR) RY-COMP(BK) RY-HEATER_N(WH) RY-HEATER_N(WH(RD)) Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.

  • Page 17: Troubleshooting Guide

    OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH MOTOR COMPRESSOR LIQUID PRESSURE LIQUID OUTLET DROP (LIQUID REFRIGERANT) HIGH PRESSURE VAPOR LIQUID REFRIGERANT CAPILLARY TUBE LOW PRESSURE VAPOR Figure 19 Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.

  • Page 18: Room Air Conditioner Voltage Limits

    Check wire locations. If not per wiring diagram, correct. Check for continuity, refer to the wiring diagram for Rotary terminal identification. Replace the switch if circuit is open. Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.
  • Page 19 Set the knob to HIGH COOL or LOW COOL while rocker switch is ON. Wiring Check terminals. If loose, repair or replace. Synchronous motor. Check the synchronous motor for open circuit. Copyright © 2022-2023 LG Electronics Ins. All right reserved.Only training and service purposes.
  • Page 20 749740 554030 130910 559011 148001 149980 731273 346811 W48602 749750 349600 359012 354210 W48602 349490 753000 152402 135313 135312 554160 130410 135316 147582 550140 552113 147580 352115 249950 W0CZZ 263RZZ 352114 2687D 2687U 267110 35211S 238310 135510 55211B 264110 237200 2687M...
  • Page 21 P/NO : MFL71779280 Rev.01_022223 Copyright © 2022-2023 LG Electronics Inc. All rights reserved. Only training and service purposes.

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