LG MT08R User guide

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OWNER’S MANUAL

AIR
CONDITIONER

CEILING CASSETTE, CEILING CONCEALED DUCT
Original instruction

[Representative] LG Electronics Inc. EU Representative :
LG Electronics European Shared Service Center B.V.
Krijgsman 1, 1186 DM Amstelveen, The Netherlands
[Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro,
Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA

MFL67870330

Rev.02_033120

Please read this manual carefully before operating your set and
retain it for future reference.

РУССКИЙ ЯЗЫК

ENGLISH

УКРАÏНСЬКА

ITALIANO

ESPAÑOL

ҚАЗАҚ ТІЛІ

БЕЛАРУСКАЯ МОВА

FRANÇAIS

O‘ZBEK TILI

DEUTSCH

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERLANDS

POLSKI

LIMBA ROMÂNĂ

TIPS FOR SAVING ENERGY

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TIPS FOR SAVING ENERGY

Here are some tips that will help you minimize the power consumption when you use the air
conditioner. You can use your air conditioner more efficiently by referring to the instructions below:

• Do not cool excessively indoors. This may be harmful for your health and may consume more
electricity.

• Block sunlight with blinds or curtains while you are operating the air conditioner.

• Keep doors or windows closed tightly while you are operating the air conditioner.

• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.

• Speed up the fan to cool or warm indoor air quickly, in a short period of time.

• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air conditioner
is used for many hours.

• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the
air flow or weaken the cooling / dehumidifying functions.

For your records

Staple your receipt to this page in case you need it to prove the date of purchase or for warranty
purposes. Write the model number and the serial number here:

Model number :

Serial number :

You can find them on a label on the side of each unit.

Dealer’s name :

Date of purchase :

IMPORTANT SAFETY INSTRUCTIONS

IMPORTANT SAFETY INSTRUCTIONS

The following symbols are displayed on indoor and outdoor units.

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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. This appliance is intended to be used by
expert or trained users in shops, in light industry and on farms, or
for commercial use by lay persons.

WARNING

!

• Always ground the product. There is a risk of electric shock.

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

• Do not use a multi consent. Always use this appliance on a
dedicated cicuit and breaker.
Otherwise it can cause electric shock or fire.

• 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.

• 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.

IMPORTANT SAFETY INSTRUCTIONS

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• 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 scrathes 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.

• 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 eletric shock.

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

• Don't use a power cord, a plug or a loose socket which is
damaged. Otherwise it may cause a fire or electrical shock.

• 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.

• 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.

• 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.

IMPORTANT SAFETY INSTRUCTIONS

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

• Make sure to check that the power cable plug is not dirty, loose
or broken and then only insert the plug completely. Dirty, loose
or broken power plug can cause electric shock or fire.

• 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.

• 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 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 sounds, 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.

• Turn the main power off and unplug the unit when cleaning or
repairing the product. There is risk of electric shock.

• 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.

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IMPORTANT SAFETY INSTRUCTIONS

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• 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.

• Do not plug or unplug the power supply plug to turn the unit
ON/OFF. There is risk of fire or electric shock.

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

• 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.

• 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. There is the risk of
death, injury, 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.)

• 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. (for R32)

• Ducts connected to an appliance shall not contain an ignition
source. (for R32)

CAUTION

!

• 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.

IMPORTANT SAFETY INSTRUCTIONS

• 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.

• 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.

• 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 anyting 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
leakaing refrigerant gas. The refrigernat 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.

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IMPORTANT SAFETY INSTRUCTIONS

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• If the refrigerant gas leaks during the installation, ventilate the
area immediately.
Otherwise it can be harmfull 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.

• If you eat the liquid from the batteries, brush your teeth and see
doctor.
Do not use the remote if the batteries have leaked. The
chemicals in batteries could cause burns or other health
hazard.

• 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 air conditioner is not intended for use by young children or
invalids without supervision.

• Young children should be supervised to ensure that they do not
play with the air conditioner.

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

IMPORTANT SAFETY INSTRUCTIONS

• 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. (for R32)

• 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. (for R32)

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

• 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.

• 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.

• If the supply cord is damaged, it must be replaced by a special
cord or assembly available from the manufacturer of its service
agent.

• The appliance shall be installed in accordance with national
wiring regulations.

• If anyone other than a licensed Professional installs, repairs, or
alters LG Electronics Air Conditioning Products, the warranty is
voided.

- All costs associated with repair are then the full responsibility

of the owner.

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TABLE OF CONTENTS

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TABLE OF CONTENTS

2 TIPS FOR SAVING ENERGY

3 IMPORTANT SAFETY INSTRUCTIONS

12 BEFORE USE

12

About the system

12

Preparing for operation

12

Usage

12

Cleaning and maintenance

12

Service

12

Disposal

13 PRODUCT INTRODUCTION

13

Name and function of parts (CEILING CASSETTE)

13

Name and function of parts (CEILING CONCEALED DUCT)

14

Model designation

14

Operation Indicator Lamp

15

Wired Remote Controller

16

Wireless Remote Controller (Accessory)

17 OPERATING INSTRUCTIONS

17

Standard Operation - Standard Cooling

18

Standard Operation - Power Cooling

18

Standard Operation - Heating Mode

19

Standard Operation - Dehumidification Mode

19

Auto Changeover Mode

20

Standard Operation - Fan Mode

21

Standard Operation - Auto Operation Mode

22

Standard Operation - Airflow Setting

23

Standard Operation - Temperature Setting/Room Temperature Check

24

Sub Function - Plasma Purification(Accessory)

25

Sub Function - Comfort Cooling

25

Function Setting - Child Lock

26

Function Setting - Change Temp

27

Function Setting - Elevation Grill(Accessory)

28

Function Setting - Filter Sign Clear

29

Function Setting - Vane Angle Control

30

Function Setting - Changing Current Time

32

Programming - Simple Reservation

33

Programming - Weekly Reservation

35

Programming - Sleep Reservation

36

Programming - ON Reservation

38

Programming - OFF Reservation

40

Programming - Holiday Reservation

41 MAINTENANCE AND SERVICE

41

Indoor Unit

42

Purifying filter(Optional)

43

Operation Tips!

43

When the air conditioner is not going....

44

Troubleshooting Tips! Save time and money!

44

Call the service immediately in the following situations

TABLE OF CONTENTS

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BEFORE USE

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BEFORE USE

About the system

This system of air conditioner can be used for heating/cooling applications.

Preparing for operation

• Contact an installation specialist for installation.

• Use a dedicated circuit.

Usage

• Being exposed to direct airflow for an extended period of time could be hazardous to your health. Do
not expose occupants, pets, or plants to direct airflow for extended periods of time.

• Due to the possibility of oxygen deficiency, ventilate the room when used together with stoves or
other heating devices.

• Do not use this air conditioner for non-specified special purposes (e.g. preserving precision devices,
food, pets, plants, and art objects). Such usage could damage the items.

Cleaning and maintenance

• Do not touch the metal parts of the unit when removing the filter. Injuries can occur when handling
sharp metal edges.

• Do not use water to clean inside the air conditioner. Exposure to water can destroy the insulation,
leading to possible electric shock.

• When cleaning the unit, first make sure that the power and breaker are turned off. The fan rotates at a
very high speed during operation. There is a possibility of injury if the unit’s power is accidentally
triggered on while cleaning inner parts of the unit.

Service

For repair and maintenance, contact your authorized service dealer.

Disposal

The unit uses hydrofluorocarbon. Contact your dealer when discarding this unit. It is required by law to
collect, transport and discard the refrigerant in accordance with the “hydrofluorocarbon collection and
destruction” regulations.

PRODUCT INTRODUCTION

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PRODUCT INTRODUCTION

Name and function of parts (CEILING CASSETTE)

1: Indoor unit
2: Outdoor unit
3: Remote controller
4: Inlet air
5: Discharge air
6: Refrigerant piping, connection electric wire
7: Drain pipe
8: Ground wire

Wire to ground outdoor unit to prevent electrical
shocks.

Name and function of parts (CEILING CONCEALED DUCT)

1: Indoor unit
2: Outdoor unit
3: Remote controller
4: Inlet air
5: Discharge air
6: Refrigerant piping, connection electric wire
7: Drain pipe
8: Ground wire

wire to ground outdoor unit to prevent electrical
shocks.

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PRODUCT INTRODUCTION

Lamp

Forced operation Button

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Model designation

- Product Name : Air conditioner

- Model Name :

SQSC N B 015

Serial number

Chassis name

Indoor Unit / Outdoor Units

N : Indoor Unit
U : Outdoor Unit

Detailed product type for
U- / C- series models

L : Low Static
H : High COP
E : Econo
R : Refrigerant R32

Nominal Capacity

Ex) 7 000 Btu/h Class → '07',
18 000 Btu/h Class → '18'

Product type

T : Ceiling Cassette
B, M : Ceiling Concealed Duct
L : Ceiling Concealed Duct
(Low Static)
V : Ceiling Suspended & floor

Connectable Outdoor unit type

M : Indoor units only for

Multi systems

U : Indoor units only for

Single A systems

C : Common Indoor Unit for

Multi and Single CAC

Operation Indicator Lamp

Description Lamp Color

Cooling mode Green

Heating mode Green

Time to clean filter in cooling/heating Mode Yellowish Green

Time to clean filter when product is not operating Orange

Hot start or defrost mode before starting heating mode Green

When reservation set on Yellowish Green