LG LW1223HRSM User manual

CAUTION
Room Air Conditioner
SVC MANUAL(Exploded View)
MODEL : LW1223HRSM
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
CONFIDENTIAL
Copyright © 2022-2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
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.

Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
■Meanings of symbols used in this manual are as shown below.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to property only.
WARNING
■Installation
Do not use damaged power cord plugs, or a
loose socket.
•There is risk of fire or electric shock.
Always use the power plug and socket with
the ground terminal.
•There is risk of electric shock.
Be sure not to do.
Be sure to follow the instruction.
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All right reserved.Only training and service purposes.
Safety Precautions

3Copyright © 2022-2023 LG Electronics Ins.
All right reserved.Only training and service purposes.
Safety Precautions
Do not modify or extend the power cord.
•There is risk or fire or electric shock.
Do not install, remove, or re-install the unit by
yourself(customer).
•There is risk of fire, electric shock, explosion, or injury.
Be cautious when unpacking and installing
the product.
•Sharp edges could cause injury. Be especially careful
of the case edges and the fins on the condenser and
evaporator.
Do not store or use flammable gas or com-
bustibles near the air conditioner.
•There is risk of fire or failure of product.
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.
Gasolin
Sharp edges

●Keep any required ventilation openings clear of obstruction.
●Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure
that the risk of ignition is minimised. For repair to the refrigerating system, the following precautions shall be
complied with prior to conducting work on the system.
●Compliance with national gas regulations shall be observed.
IMPORTANT SAFETY INSTRUCTIONS
WARNING
WARNING
To reduce the risk of explosion, fire, death, electric shock, scalding or injury to persons, follow basic
precautions, including the following:
Checks to the area
●Work shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or
vapour being present while the work is being performed.
Work procedure
●All maintenance staff and others working in the local area shall be instructed on the nature of work being
carried out. Work in confined spaces shall be avoided. The area around the workspace shall be sectioned off.
Ensure that the conditions within the area have been made safe by control of flammable material.
General work area
●The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the
technician is aware of potentially flammable atmospheres. Ensure that the leak detection equipment being
used is suitable for use with flammable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.
Checking for presence of refrigerant
●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.
Presence of fire extinguisher
●This appliance is not intended for use by persons (including children) with reduced physical,sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction
concerning the use of the appliance by a person responsible for their safety. Children should be supervised
to ensure that they do not play with the appliance.
●If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified
person in order to avoid a hazard.
●Do not use means to accelerate the defrosting process or to clean, other than those recommended by the
manufacturer.
●The appliance shall be stored in a room without continuously operating open flames (for example an operating
gas appliance) and ignition sources (for example an operating electric heater).
●Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair
requiring the assistance of other skilled personnel shall be carried out under the supervision of the person
competent in the use of flammable refrigerants.
●The appliance shall be stored so as to prevent mechanical damage from occurring.
●Do not pierce or burn. Be aware that flammable refrigerants may not contain an odor.
●The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as
specified for operation.
●Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid
certificate from an industry-accredited assessment authority, which authorises their competence to handle
refrigerants safely in accordance with an industry recognised assessment specification.
If you want to know information of installation, Read Installation Manual.
Mechanical connections (mechanical connectors or flared joints) shall be accessible for maintenance purposes.
●
●
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All right reserved.Only training and service purposes.
Safety Precautions

●No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that
contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may
lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept
sufficiently far away from the site of installation, repairing, removing and disposal, during which flammable
refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area around the
equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks.
“No Smoking” signs shall be displayed.
No ignition sources
●Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or
conducting any hot work. A degree of ventilation shall continue during the period that the work is carried out.
The ventilation should safely disperse any released refrigerant and preferably expel it externally into the
atmosphere.
Ventilated area
●Where electrical components are being changed, they shall be fit for the purpose and to the correct
specification. At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt
consult the manufacturer’s technical department for assistance.
●The following checks shall be applied to installations using flammable refrigerants:
– The actual refrigerant charge is in accordance with the room size within which the refrigerant containing
parts are installed.
●Initial safety checks shall include:
– Capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking.
– No live electrical components and wiring are exposed while charging, recovering or purging the system.
– Continuity of earth bonding.
– The ventilation machinery and outlets are operating adequately and are not obstructed.
– If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence
of refrigerant.
– Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be
corrected.
– Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any
substance which may corrode refrigerant containing components, unless the components are constructed of
materials which are inherently resistant to being corroded or are suitably protected against being so corroded.
Checks to the refrigeration equipment
●During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being
worked upon prior to any removal of sealed covers, etc.
●Particular attention shall be paid to the following to ensure that by working on electrical components, the
casing is not altered in such a way that the level of protection is affected.
●This shall include damage to cables, excessive number of connections, terminals not made to original
specification, damage to seals, incorrect fitting of glands, etc.
●Ensure that apparatus is mounted securely.
●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.
●If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently
operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous
situation.
Repairs to sealed components
●Repair and maintenance to electrical components shall include initial safety checks and component inspection
procedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the
circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to
continue operation, an adequate temporary solution shall be used. This shall be reported to the owner of the
equipment so all parties are advised.
Checks to electrical devices
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All right reserved.Only training and service purposes.
Safety Precautions