LG MU2R15 INSTALLATION INSTRUCTIONS

РУССКИЙ ЯЗЫК

ENGLISH

УКРАÏНСЬКА

ITALIANO ESPAÑOL FRANÇAIS DEUTSCH

ҚАЗАҚ ТІЛІ

INSTALLATION MANUAL

AIR
CONDITIONER

Please read this installation manual completely before installing the product.
Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
Please retain this installation manual for future reference after reading it thoroughly.

MULTI
Original instruction

[

Representative] LG Electronics Inc. EU Representative : LG Electronics European Shared Service Center B.V.

[

Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu, Changwon-si,

Krijgsman 1, 1186 DM Amstelveen, The Netherlands

Gyeongsangnam-do, KOREA

БЕЛАРУСКАЯ МОВА

O‘ZBEK TILI

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERLANDS

POLSKI

LIMBA ROMÂNĂ

MFL68883815

Rev.02_100820

www.lg.com

Copyright © 2017 - 2020 LG Electronics Inc. All Rights Reserved.

IMPORTANT SAFETY INSTRUCTIONS

2

ENGLISH

IMPORTANT SAFETY INSTRUCTIONS

Read the precautions in this
manual carefully before operat­ing the unit.

This symbol indicates that the
Operation Manual should be
read carefully.

This appliance is filled with flammable
refrigerant (R32)

This symbol indicates that a service
personnel should be handling this
equipment with reference to the
Installation Manual.

READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.

Always comply with the following precautions to avoid danger­ous situations and ensure peak performance of your product

WARNING

!

It can result in serious injury or death when the directions are ignored

CAUTION

!

It can result in minor injury or product damage when the direc­tions are ignored

WARNING

!

• Installation or repairs made by unqualified persons can result in
hazards to you and others.

•

Installation work must be performed in accordance with the Na­tional Electric Code by qualified and authorized personnel only.

• The information contained in the manual is intended for use by
a qualified service technician familiar with safety procedures
and equipped with the proper tools and test instruments.

• Failure to carefully read and follow all instructions in this man­ual can result in equipment malfunction, property damage, per­sonal injury and/or death.

• Compliance with national gas regulations shall be observed.

Installation

•

Do not use a defective or underrated circuit breaker. Use the cor­rectly rated breaker and fuse. There is risk of fire or electric shock.

•

For electrical work, contact the dealer, seller, a qualified electri­cian, or an Authorized Service Center. Do not disassemble or re­pair the product by yourself. There is risk of fire or electric shock.

IMPORTANT SAFETY INSTRUCTIONS

3

• Always ground the product as per the wiring diagram. Do not
connect the ground wire to gas or water pipes lightening rod or
telephone ground wire. There is risk of fire or electric shock.

• Install the panel and the cover of control box securely. There is
risk of fire or electric shock due to dust, water etc.

• Use the correctly rated breaker or fuse. There is risk of fire or
electric shock.

• Do not modify or extend the power cable. If the power cable or
cord has scratches or skin peeled off or deteriorated then it
must be replaced. There is risk of fire or electric shock.

• For installation, removal or reinstall, always contact the dealer
or an Authorized Service Center. There is risk of fire, electric
shock, explosion, or injury.

• Do not install the product on a defective installation stand. Be
sure that the installation area does not deteriorate with age. It
may cause product to fall.

• Never install the outdoor unit on a moving base or a place from
where it can fall down. The falling outdoor unit can cause dam­age or injury or even death of a person.

• In outdoor unit the step-up capacitor supplies high voltage
electricity to the electrical components. Be sure to discharge
the capacitor completely before conducting the repair work.
An charged capacitor can cause electrical shock.

•

When installing the unit, use the installation kit provided with the
product. Otherwise the unit may fall and cause severe injury.

• Indoor/outdoor wiring connections must be secured tightly and
the cable should be routed properly so that there is no force
pulling the cable from the connection terminals. Improper or
loose connections can cause heat generation or fire.

• Safely dispose off the packing materials. Like screws, nails,
batteries, broken things etc after installation or svc and then
tear away and throw away the plastic packaging bags. Children
may play with them and cause injury.

• Be sure to check the refrigerant to be used. Please read the
label on the product. Incorrect refrigerant used can prevent the
normal operation of the unit.

•

Do not turn on the breaker or power under condition that front
panel, cabinet, top cover, control box cover are removed or opened.
Otherwise, it may cause fire, electric shock, explosion or death.

ENGLISH

IMPORTANT SAFETY INSTRUCTIONS

4

ENGLISH

•

Use a vacuum pump or Inert (nitrogen) gas when doing leakage
test or air purge. Do not compress air or Oxygen and do not use
Flammable gases. Otherwise, it may cause fire or explosion.

• The appliance shall be stored in a room without continuously
operating ignition sources (for example: open flames, an oper­ating gas appliance or an operating electric heater)

• Do not use means to accelerate the defrosting process or to
clean, other than those recommended by the manufacturer.

• Do not pierce or burn refrigerant cycle part.

• Be aware that refrigerants may not contain an odour.

• Keep any required ventilation openings clear of obstruction.

•

The appliance shall be stored in a well-ventilated area where the
room size corresponds to the room area as specified for operation.

•

Refrigerant tubing shall be protected or enclosed to avoid damage.

• Flexible refrigerant connectors (such as connecting lines be­tween the indoor and outdoor unit) that may be displaced dur­ing normal operations shall be protected against mechanical
damage.

• A brazed, welded, or mechanical connection shall be made be­fore opening the valves to permit refrigerant to flow between
the refrigerating system parts.

• Mechanical connections shall be accessible for maintenance
purposes.

Operation

• When the product is soaked (flooded or submerged) in water ,
contact an Authorized Service Center for repair before using it
again. There is risk of fire or electric shock.

• Be sure to use only those parts which are listed in the svc
parts list. Never attempt to modify the equipment. The use of
inappropriate parts can cause an electrical shock, excessive
heat generation or fire.

• Do not touch , operate, or repair the product with wet hands.
Hold the plug by hand when taking out. There is risk of electric
shock or fire.

• Do not place a heater or other heating appliances near the
power cable. There is risk of fire and electric shock.

IMPORTANT SAFETY INSTRUCTIONS

• Do not allow water to run into electric parts. Install the unit
away from water sources. There is risk of fire, failure of the
product, or electric shock.

• Do not store or use or even allow flammable gas or com­bustibles near the product. There is risk of fire.

• Do not use the product in a tightly closed space for a long
time. Perform ventilation regularly. Oxygen deficiency could
occur and hence harm your health.

•

Do not open the front grille of the product during operation. (Do
not touch the electrostatic filter, if the unit is so equipped.)
There is risk of physical injury, electric shock, or product failure.

• If strange sound, smell or smoke comes from product.Immedi­ately turn the breaker off or disconnect the power supply
cable. There is risk of electric shock or fire.

• Ventilate the product room from time to time when operating it
together with a stove, or heating element etc. Oxygen defi­ciency can occur and hence harm your health.

• When the product is not to be used for a long time, disconnect
the power supply plug or turn off the breaker. There is risk of
product damage or failure, or unintended operation.

• Take care to ensure that nobody especially kids could step on
or fall onto the outdoor unit. This could result in personal injury
and product damage.

• Take care to ensure that power cable could not be pulled out
or damaged during operation. There is risk of fire or electric
shock.

• Do not place anything on the power cable. There is risk of fire
or electric shock.

• When flammable gas leaks, turn off the gas and open a win­dow for ventilation before turning on the product. Do not use
the telephone or turn switches on or off. There is risk of explo­sion or fire.

• Make sure to ventilate sufficiently when this air conditioner
and a heating appliance such as a heater are used simultane­ously. Failure to do so may result in fire, serious injury, or prod­uct failure.

• Periodic ( more than once/year ) cleaning of the dust or salt
particles stuck on the heat exchanger by using water.

5

ENGLISH

IMPORTANT SAFETY INSTRUCTIONS

6

ENGLISH

• Dismantling the unit, treatment of the refrigerant oil and even­tual parts should be done in accordance with local and national
standards.

CAUTION

!

Installation

• Two or more people must lift and transport the product. Avoid
personal injury.

• Do not install the product where it will be exposed to sea wind
(salt spray) directly. It may cause corrosion on the product.

• Install the drain hose to ensure that the condensed water is
drained away properly. A bad connection may cause water
leakage.

• Keep level even when installing the product. To avoid vibration
or noise.

• Do not install the product where the noise or hot air from the
outdoor unit could damage or disturb the neighborhoods. It
may cause a problem for your neighbors and hence dispute.

• Always check for gas (refrigerant) leakage after installation or
repair of product. Low refrigerant levels may cause failure of
product.

• 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 authorizes
their competence to handle refrigerants safely in accordance
with an industry recognized assessment specification.

• Wear adequate personal protection equipment (PPE) when in­stalling, maintaining or servicing the product.

Operation

• Do not use the product for special purposes, such as preserv­ing foods, works of art, etc. It is a consumer air conditioner,
not a precision refrigeration system. There is risk of damage or
loss of property.

• Do not block the inlet or outlet of air flow. It may cause prod­uct failure.

IMPORTANT SAFETY INSTRUCTIONS

• Use a soft cloth to clean. Do not use harsh detergents, sol­vents or splashing water etc. There is risk of fire, electric
shock, or damage to the plastic parts of the product.

• Do not touch the metal parts of the product when removing
the air filter. There is risk of personal injury.

• Do not step on or put anything on the product. (outdoor units)
There is risk of personal injury and failure of product.

• Always insert the filter securely after cleaning. Clean the filter
every two weeks or more often if necessary. A dirty filter re­duces the efficiency.

• Do not insert hands or other objects through the air inlet or
outlet while the product is operating. There are sharp and mov­ing parts that could cause personal injury.

• Be cautious when unpacking and installing the product. Sharp
edges could cause injury.

• If the refrigerant gas leaks during the repair, do not touch the
leaking refrigerant gas. The refrigerant gas can cause frostbite
(cold burn).

• Do not tilt the unit when removing or uninstalling it. The con­densed water inside can spill.

•

Do not mix air or gas other than the specified refrigerant used in
the system. If air enters the refrigerant system, an excessively
high pressure results, causing equipment damage or injury.

• If the refrigerant gas leaks during the installation, ventilate the
area immediately. Otherwise it can be harmful for your health.

• Dismantling the unit, treatment of the refrigerant oil and even­tual parts should be done in accordance with local and national
standards.

• Replace the all batteries in the remote control with new ones
of the same type. Do not mix old and new batteries or differ­ent types of batteries. There is risk of fire or product failure.

• Do not recharge or disassemble the batteries. Do not dispose
off batteries in a fire. They may burn or explode.

• If the liquid from the batteries gets onto your skin or clothes,
wash it well with clean water. Do not use the remote if the
batteries have leaked. The chemicals in batteries could cause
burns or other health hazards.

7

ENGLISH

IMPORTANT SAFETY INSTRUCTIONS

8

ENGLISH

• If you swallow the battery fluid from a leak, wash out the in­side of your mouth thoroughly and then consult a doctor. Fail­ure to do so may result in serious health complications.

• Do not let the air conditioner run for a long time when the hu­midity is very high and a door or a window is left open. Mois­ture may condense and wet or damage furniture.

• Do not expose your skin or kids or plants to the cool or hot air
draft. This could harm to your health.

• Do not drink the water drained from the product. It is not sani­tary and could cause serious health issues.

•

Use a firm stool or ladder when cleaning, maintaining or repairing
the product at an height. Be careful and avoid personal injury.

• The appliance shall be stored so as to prevent mechanical
damage from occurring.

• 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 installation of pipe-work shall be kept to a minimum

• When mechanical connectors are reused indoors, sealing parts
shall be renewed.

• When flared joints are reused indoors, the flare part shall be re­fabricated.

•

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 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.

• This appliance can be used by children aged from 8 years and
above and persons with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have
been given supervision or instruction concerning use of the ap­pliance in a safe way and Understand the hazards involved.
Children shall not play with the appliance. Cleaning and user
maintenance shall not be made by children without supervision

TABLE OF CONTENTS

TABLE OF CONTENTS

9

ENGLISH

2 IMPORTANT SAFETY

INSTRUCTIONS

10 INSTALLATION

11 INSTALLATION OF OUT-

DOOR UNIT

11 Select the best location

13 Piping length and elevation

13 Refrigerant charge

14 FLARING WORK AND

CONNECTION OF PIPING

14 Preparation of Piping

15 Connection of piping - Outdoor

16 CONNECTING THE CABLE

BETWEEN INDOOR UNIT
AND OUTDOOR UNIT

16 Connect the cable to the Indoor unit

17 Connect the cable to the Outdoor unit

19 FORMING THE PIPING

22 INSTALLATION PI485

23 TEST RUNNING

24 FUNCTION

24 DIP S/W Setting

26 Forced Cooling Operation

26 Wiring Error Check

27 Saving Power Consumption

28 Night Quiet Mode

29 Mode Lock

30 MAX COMBINATION

CAPACITY

31 INSTALLATION GUIDE AT

THE SEASIDE

31 SEASONAL WIND AND

CAUTIONS IN WINTER

32 Model Designation

32 Airborne Noise Emission

20 AIR PURGING AND EVAC-

UATION

20 Checking method

21 Evacuation

INSTALLATION

Installation plate

Type "B" screws

Type "A" screw (6 EA) Type "A" screw (8 EA) Type "A" screw (7 EA)

Holder Remote Control

Type "A" screw and plastic anchors

10

ENGLISH

INSTALLATION

Installation Parts

Clearance of side discharge unit [Unit : mm(inch)]

Do not install the product where sufficient ventilation is not secured.
The performance may be decreased or the product may not be operated.

6) or less

1

00(19-11/

300(11-13/16)

or more

ss

erom

19-11/16) or le

0(

50

ro
)8/
3-93(0001

H

300(11-13/16)

10

39

00(

or more

or more

3/8)

-

D

L

h In case of series or another installation, please refer to related PDB.

5

30

0

(

11-13

or

m

/16

ore

)

600(23-19

or more

/32)

600(23-19/32) or more

1000(39-3/8) or more

00
0

1 (39-3/8) or more

11-13/16)

300(

or more

300(11-13/16)
or more

2000(78-3/4) or more