LG | LTNC186PLF3.APUNEI | LG LTNC186PLF3.APUNEI Owner’s Manual

AIR
CONDITIONER
Please read this manual carefully before operating
your set and retain it for future reference.
TYPE : Highlander Ceiling Cassette Air Conditioner
For Single Ceiling Cassette models
MFL62865706
P/No : MFL62865706_v2
CUSTOMER CARE
1800-180-3575 (Toll Free)
CALL
12 x 7 (9:00 AM – 9:00 PM)
CLICK
www.lg.com/in/support
cac.service@lgepartner.com
To know more about LG, visit www.lg.com
For Corporate/Instutional enquiries,
please write to enquiries@lgindia.com
Regd. Office : LG Electronics India Pvt. Ltd., A Wing (3rd Floor), D-3, District Center, Saket, New Delhi - 110017
Ceiling Cassette Air Conditioner Owner’s Manual
TABLE OF CONTENTS
Safety Precautions.........................3
FOR YOUR RECORDS
Write the model and serial numbers here:
Model #
Prior to Operation ..........................8
Serial #
You can find them on a label on the side of each unit.
Dealer's Name
Introduction ....................................9
Date Purchased
n Staple your receipt to this page in the event you need
it to prove date of purchase or for warranty issues.
Electrical Safety ...........................10
Operating Instructions.................11
Maintenance and Service ............66
READ THIS MANUAL
Inside you will find many helpful hints on how to use
and maintain your air conditioner properly. Just a little
preventive care on your part can save you a great deal
of time and money over the life of your air conditioner.
You'll find many answers to common problems in the
chart of troubleshooting tips. If you review our chart of
Troubleshooting Tips
for service at all.
first, you may not need to call
PRECAUTION
• Contact the authorized service technician for
repair or maintenance of this unit.
• Contact the installer for installation of this unit.
• 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.
• When the power cord is to be replaced,
replacement work shall be performed by
authorized personnel only using only genuine
replacement parts.
• Installation work must be performed in
accordance with the National Electric Code by
qualified and authorized personnel only.
2 Ceiling Cassette Air Conditioner
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions
must be followed.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness
is classified by the following indications.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
n Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
n Installation
Do not use a defective or
underrated circuit breaker.
Use this appliance on a
dedicated circuit.
• 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. There is risk of fire or
electric shock.
Install the panel and the
cover of control box
securely.
Always install a dedicated
circuit and breaker.
• There is risk of fire or electric
shock.
• Improper wiring or installation
may cause fire or electric shock
Always ground the product.
• There is risk of fire or electric
shock.
Use the correctly rated
breaker or fuse.
• There is risk of fire or electric
shock.
Owner's Manual 3
Safety Precautions
Do not modify or extend the
power cable.
• There is risk of fire or electric
shock.
For installation, always contact the
dealer or an Authorized Service Center.
• There is risk of fire, electric
shock, explosion, or injury.
Do not install, remove, or
re-install the unit by yourself
(customer).
• There is risk of fire, electric
shock, explosion, or injury.
Do not install the product on a
defective installation stand.
• It may cause injury, accident, or
damage to the product.
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.
Be sure the installation area
does not deteriorate with age.
• If the base collapses, the air
conditioner could fall with it,
causing property damage,
product failure, and personal
injury.
n Operation
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 plug or unplug the
power supply plug during
operation.
• There is risk of fire or electric
shock.
Take care to ensure that power
cable could not be pulled out or
damaged during operation.
Do not place anything on
the power cable.
• There is risk of fire or electric
shock.
• There is risk of fire or electric
shock.
Do not touch(operate) the
product with wet hands.
Do not place a heater or
other appliances near the
power cable.
• There is risk of fire or electrical
shock.
• There is risk of fire and electric
shock.
4 Ceiling Cassette Air Conditioner
Safety Precautions
Do not allow water to run
into electric parts.
• It may cause There is risk of fire,
failure of the product, or electric
shock.
Do not store or use flammable
gas or combustibles near the
product.
• There is risk of fire or failure of
product.
Do not use the product in a
tightly closed space for a
long time.
• Oxygen deficiency could occur.
Gasolin
When flammable gas leaks,
turn off the gas and open a
window for ventilation
before turn the product on.
If strange sounds, or small or
smoke comes from product. Turn
the breaker off or disconnect the
power supply cable.
• Do not use the telephone or turn
switches on or off.
There is risk of explosion or fire
• There is risk of electric shock or
fire.
Do not open the inlet grill of the
product during operation.
(Do not touch the electrostatic
filter, if the unit is so equipped.)
When the product is soaked
(flooded or submerged),
contact an Authorized
Service Center.
• There is risk of physical injury,
electric shock, or product failure.
• There is risk of fire or electric
shock.
Ventilate the product from time to time when
operating it together with a stove, etc.
• There is risk of fire or electric shock.
Stop operation and close the window
in storm or hurricane. If possible,
remove the product from the window
before the hurricane arrives.
• There is risk of property damage,
failure of product, or electric shock.
Be cautious that water could
not enter the product.
• There is risk of fire, electric shock,
or product damage.
Turn the main power off when cleaning or
maintaining the product.
• There is risk of electric shock.
Owner's Manual 5
Safety Precautions
When the product is not 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 could step
on or fall onto the outdoor unit.
• This could result in personal injury and product
damage.
n Installation
Always check for gas
(refrigerant) leakage after
installation or repair of product.
• Low refrigerant levels may cause
failure of product.
Install the drain hose to
ensure that water is drained
away properly.
• A bad connection may cause
water leakage.
Keep level even when
installing the product.
• To avoid vibration or water
leakage.
90°
Do not install the product where the
noise or hot air from the outdoor unit
could damage the neighborhoods.
• It may cause a problem for your
neighbors.
Use two or more people to
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. Corrosion, particularly on
the condenser and evaporator fins,
could cause product malfunction or
inefficient operation.
n Operation
Do not expose the skin directly to cool air
for long periods of time.
(Don't sit in the draft.)
• This could harm to your health.
6 Ceiling Cassette Air Conditioner
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.
Safety Precautions
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, 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. They are very sharp!
• There is risk of personal injury.
x i r
Wa Thnne
Do not step on or put
anyting on the product.
(outdoor units)
Always insert the filter securely.
Clean the filter every two weeks
or more often if necessary.
Do not insert hands or other
objects through the air inlet or
outlet while the product is operated.
• There is risk of personal injury
and failure of product.
• A dirty filter reduces the efficiency
of the air conditioner and could
cause product malfunction or
damage.
• There are sharp and moving parts
that could cause personal injury.
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 or
maintaining the product.
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.
• Be careful and avoid personal
injury.
• There is risk of fire or explosion
Do not recharge or disassemble the batteries.
Do not dispose of 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.
Owner's Manual 7
Prior to Operation
Prior to Operation
Preparing for operation
1. Contact an installation specialist for installation.
2. Plug in the power plug properly.
3. Use a dedicated circuit.
4. Do not use an extension cord.
5. Do not start/stop operation by plugging/unplugging the power cord.
6. If the cord/plug is damaged, replace it with only an authorized replacement part.
Usage
1. 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.
2. Due to the possibility of oxygen deficiency, ventilate the room when used together
with stoves or other heating devices.
3. 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
1. Do not touch the metal parts of the unit when removing the filter. Injuries can occur
when handling sharp metal edges.
2. Do not use water to clean inside the air conditioner. Exposure to water can destroy
the insulation, leading to possible electric shock.
3. 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.
8 Ceiling Cassette Air Conditioner
Introduction
Introduction
Symbols used in this Manual
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that could cause harm to the
air conditioner.
NOTICE
This symbol indicates special notes.
Features
WARNING: This appliance should be installed in accordance with national wiring
regulations. This guide acts as a guide to help to explain product features.
Anti-bacteria
Anti-bacteria
Air Outlet
Air Inlet
Wired
Remote
Controller
(Optional)
Wireless
Remote
Controller
(Standard)
Owner's Manual 9
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product and its operator’s manual, it means the product is covered
by the e-waste Management and Handling Rules, 2011 and are
meant to be recycled, dismantled, refurbished or disposed off.
2. Dos
a. The product is required to be handed over only to the authorized
recycler for disposal.
b. Keep the product in isolated area, after it becomes nonfunctional/un-repairable so as toprevent its accidental breakage.
Don’t
a. The product should not be opened by the user himself/herself, but only by authorized
service personnel.
b. The product is not meant for re-sale to any unauthorized agencies/scrap dealer/
kabariwalah.
c. The product is not meant for mixing into household waste stream.
d. Do not keep any replaced spare part(s) from the product in exposed area.
3. Any disposal through unauthorized agencies/person will attract action under Environment
(Protection) Act 1986.
4. Hazards of improper handling or accidental breakage
a. If batteries are disposed incorrectly, it can greatly harm the environment. The chemical
by-products are hazardousT
. he metals and chemicals found in batteries can mix into
soil which may be hazardous to humans, plants and animals. If thrown in fire, they can
cause blast and release toxic gases which may be harmful for health.
b. The refrigerant (R-22) used can be combustible at low pressure. The potential health
effects of over exposure is dizziness, headache and heart irregularities
5. To locate a nearest collection centre or call for pick-up (limited area only) for disposal of
this appliance, please contact Toll Free No.1800-180-3575 for details. All collection
centre and pick up facilities are done by third parties with LG Electronics India Pvt. Ltd.
merely as a facilitator.
For more detailed information , please visit : http://www.lge.com/in
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Operating Instructions
Operating Instructions
Indoor Unit, Outdoor Unit
Anti-bacteria
Anti-bacteria
Air Outlet
Air Inlet
Wired Remote
Controller (Optional)
1
2
3
4
5
Wireless Remote Controller
(Standard)
6
Operation Indication Lamps
1
Forced Operation : Operation procedures when remote control can't be used.
2
Defrost Mode
: Lights up during defrost mode or hot start operation.
(heat pump model only)
3
Timer
: Lights up during timer operation.
4
Signal Receptor : Receives the signal from remote control (signal receiving sound:
two short beeps and one long beep)
5
Filter Sign
: Lights up after 2400 hours from the time of first operation.
6
On/Off
: Lights up during system operation.
Outdoor Unit
Air Intake
(side, rear)
Connecting Wire
Power Wire
Air Outlet
Vents
Connection Tube
Drain Hose
Heat pump model: Cassette Type Air Conditioner for cooling and heating
Cooling model: Cassette Type Air Conditioner for cooling
Owner's Manual 11
Operating Instructions
Operating Instructions
12 Ceiling Cassette Air Conditioner
Wireless Remote Controller (Standard)
Owner's Manual 13
Operating Instructions
Installer Setting - How to enter installer setting mode
14 Ceiling Cassette Air Conditioner
Operating Instructions
Installer Setting - Installer Setting Code Table
Owner's Manual 15
Operating Instructions
Installer Setting - Setting Address of Central Control
16 Ceiling Cassette Air Conditioner
Operating Instructions
Cooling Mode
Owner's Manual 17
Operating Instructions
Auto Operation Mode
18 Ceiling Cassette Air Conditioner
Operating Instructions
Dehumidification Mode
Owner's Manual 19
Operating Instructions
Fan Mode
20 Ceiling Cassette Air Conditioner
Operating Instructions
Temperature Setting/Room Temperature Checking
Owner's Manual 21
Operating Instructions
Airflow Setting
22 Ceiling Cassette Air Conditioner
Operating Instructions
Plasma Purification (Optional)
Owner's Manual 23
Operating Instructions
Individual vane angle control
24 Ceiling Cassette Air Conditioner
Operating Instructions
Timer
Owner's Manual 25
Wide LCD Wired Remote Controller (Optional)
26 Ceiling Cassette Air Conditioner
Owner's Manual 27
28 Ceiling Cassette Air Conditioner
Installation instruction
3. Please fix remote controller upper part into
the setup board attached to the surface of the
wall, as the picture below, and then, connect
with setup board by pressing lower part.
- Please connect not to make a gap at the remote controller
and setup board?s upper and lower, right and left part.
When separating remote controller from
setup board, as the picture below, after
inserting into the lower separating hole using
screw driver and then, spinning clockwise,
remote controller is separated.
- There are two separating holes. Please individually
separate one at a time.
<Connecting order>
Wall
Side
Wall
Side
<Separating order>
Wall
Side
Wall
Side
- Please be careful not to damage the inside
components when separating.
4. Please connect indoor unit and remote controller using connection cable.
Please check if connector is normally connected.
Indoor
Unit side
Connecting cable
5. Please use extension cable if the distance between wired remote controller and
indoor unit is more than 10m.
CAUTION
When installing the wired remote controller, do not bury it in the wall.
(It can cause damage in the temperature sensor.)
Do not install the cable to be 50m or above.
(It can cause communication error.)
• When installing the extension cable, check the connecting direction of the connector of the remote controller
side and the product side for correct installation.
• If you install the extension cable in the opposite direction, the connector will not be connected.
• Specification of extension cable: 2547 1007 22# 2 core 3 shield 5 or above.
Owner's Manual 29
Installation instruction
Group control
1. When installing more than 2
units of air conditioner to one
wired remote controller, please
connect as the right figure.
• If it is not event communication
indoor unit, set the unit as slave.
• Check for event communication
through the product manual.
GND
Signal wire
12V
GND
Signal wire
When controlling multiple indoor units with event communication function with one remote
controller, you must change the master/slave setting from the indoor unit.
- Indoor units, the master/slave configuration of the product after completion of indoor unit power
?OFF? and then ?ON? the power after 1 minutes elapsed sign up.
- For ceiling type cassette and duct product group, change the switch setting of the indoor PCB.
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
#3 switch OFF: Master
(Factory default setting)
#3 switch ON: Slave
- For wall-mount type and stand type product, change the master/slave setting with the wireless
remote controller. (Refer to wireless remote controller manual for detail)
When installing 2 remote controllers to one indoor unit with event communication function, set
the master/slave of the remote controller. (Refer to remote controller master/slave selection)
When controlling the group, some functions excluding basic operation setting, fan level
Min/Mid/Max, remote controller lock setting and time setting may be limited.
2. When installing more than 2 wired
remote controllers to one air
conditioner, please connect as the
right picture.
• When installing more than 2 units of wired
remote controller to one air conditioner, set
one wired remote controller as master and
the others all as slaves, as shown in the
right picture.
• You cannot control the group as shown in
the right for some products.
• Refer to the product manual for more detail.
GND
Signal wire
12V
B Y R
MASTER
B Y R
SLAVE
<When simultaneously connecting
2 sets of wired remote controller>
• When controlling in groups, set the master/slaver of the remote controller. Refer to
Installer setting section on how to set master/slave for more detail.
30 Ceiling Cassette Air Conditioner
GND
Signal wire
12V
Installation instruction
Installer Setting - How to enter installer setting mode
CAUTION
Installer setting mode is to set the detail function of the remote controller.
If the installer setting mode is not set correctly, it can cause problems to the product, user injury or
property damage. This must be set by an certificated installer, and any installation or change that is
carried out by a non-certificated person should be responsible for the results. In this case, free service
cannot be provided .
pressing
button long for 3 seconds,
1 Ifit enters
into remote controller setter
setup mode.
- If pressing once shortly, it enters into
user setup mode. Please press more
than 3 seconds for sure.
you enter the setting mode
2 When
initially, Function code is displayed on
the bottom of the LCD screen.
Function Code
Value
• Some categories of the menu may not be displayed according to the function of the
product, or the menu name may be different.
Owner's Manual 31
Owner's instruction
Owner's instruction
Standard Operation - Standard Cooling
It cools the room by comfortable and clean wind.
1 Press
indoor.
button to turn on the
button to select
2 Press
Cooling operation mode.
the desired temperature
3 Adjust
by pressing
buttons.
Press
button to check the
Room temperature.
When setting the desired
temperature higher than room
temperature, only ventilation
wind is blow out instead of
cooling wind.
Setting Temp Range : 18˚C~30˚C (64˚F~86˚F)
32 Ceiling Cassette Air Conditioner
Owner's instruction
Standard Operation - Power Cooling
It makes the room cool using pleasant and fresh air quickly
1 Press
indoor.
button to trun on the
button to select
2 Press
cooling operation mode.
button continuously
3 Press
until 'Po' displayed.
What is Power Cooling?
• Desired temperature: Po (actually 18°C)
• Wind flow: power wind
• Wind direction: fix to air-cooling position
}
It make room temperature
drop fast by running
Partial product has no power air-cooling function.
Standard Operation - Heating Mode
It supplies warm wind to the indoor
1 Press
indoor.
button to turn on the
button to select
2 Press
Heating mode.
(To check the indoor temperature,
press the room temperature button.)
the desired temperature
3 Adjust
by pressing
buttons.
When setting the desired
temperature lower than room
temperature, there is only
ventilation wind.
• Heating drive only operates at the cooling and heating model.
• Heating doesn't operate at cooling exclusive model.
Owner's Manual 33
Owner's instruction
Standard Operation - Dehumidification Mode
It removes humidity while air-cooling weakly.
1 Press
indoor.
button to turn on the
button to select
2 Press
Dehumidification mode.
The temperature setting can not be
adjusted during operation this mode.
the
button to select
3 Press
airflow rate feeble weak
medium strong automatic.
(The initial wind powerfulness of
humidity removal drive is 'weak'.)
• In rainy season or high humidity climate, it is possible to operate simultaneously dehumidifier and
cooling mode to remove humidity effectively.
• The menu item of wind powerfulness might not be partially selected according to the product.
Standard Operation - Fan Mode
It blows the air as it is in the indoor, not the cold wind.
1 Press
indoor.
button to turn on the
2 Press
Mode.
button to select Fan
time pressing
button, you
3 Every
can select wind flow in order of
feeble weak medium strong
automatic.
When running ventilation,
compressor of AHU doesn't work.
• Ventilation drive does not release cool wind but general fan
• Because it releases the wind that has no temperature difference from the room, it functions to
circulate the inside air.
• The menu item of wind powerfulness might not be partially selected according to the product.
34 Ceiling Cassette Air Conditioner
Owner's instruction
Standard Operation - Auto Operation Mode
1 Press
indoor.
button to turn on the
button to select
2 Press
Artificial intelligence Mode.
can adjust
3 You
the temperature
as the picture on
the right for
cooling and
heating model.
the case of
4 For
cooling exclusive,
as the picture on
the right, you can
adjust the
temperature from
hot to cold, from
"-2" to "2" based
on "00".
When cold
When cool
When appropriate
When warm
When hot
During operating Auto Operation mode :
• We can use the FAN SPEED butto n
• We can change manually to other operation mode.
Owner's Manual 35
Owner's instruction
Standard Operation - Temperature Setting/Room Temperature Check
Temperature Setting
can simply adjust the desired
1 We
temperature.
• Press the
buttons to adjust the
desired temperature.
: Increase 1°C or 2°F per one time
pressing
: Decrease 1°C or 2°F per one time
pressing
• Room temp: Indicate the current room
temperature.
• Set temp: Indicate the temperature that user
want to set.
Depend on what kind of controller, the desired
temperature can be adjusted at 0.5°C or 1°F.
Cooling operation:
- The cooling mode doesn't work if
desired temperature is higher than room
temperature Please lower the desired
temperature.
Heating operation:
- The heating mode doesn't work if desired
temperature is lower than room
temperature Please increase the desired
temperature.
Room Temperature Check
press
button, the room
1 Whenever
temperature will be displayed within 5
seconds.
After 5 seconds, it turns to display the
desired temperature.
Because of location of remote controller,
the real room temperature and the this
displayed value can be different
• For air-cooling drive, from 18°C to 30°C, and for heating drive, from 16°C to 30°C, you can selec t
desired temperature.
• 5°C is proper for the difference between room and outside temperature.
36 Ceiling Cassette Air Conditioner
Owner's instruction
Standard Operation - Airflow Setting
Wind powerfulness : You can simply adjust
desired wind powerfulness.
setup desired wind
1 Please
powerfulness by wind powerfulness
button.
• Every time you press wind
powerfulness, you can select the wind flow in
order of ‘feeble weak weak medium ?
medium medium strong strong ? power
automatic’.
• The menu item might not be partially
selected according to product function.
• Please refer to product manual for product’s
detailed function.
Wind direction : You can simply adjust desired
wind direction.
set desired wind direction
1 Please
by pressing
button.
You can select wind direction of
(comfortable wind Up/Down and
Right/Left Right/Left
Up/Down) by pressing
button.
Partial item of wind directions might not be
selected according to product function.
Please refer to product manual for product’s
detailed function.
Owner's Manual 37
Owner's instruction
Sub function - Direct Wind / Indirect Wind
It is the function to directly or indirectly control wind direction by body perception sensor.
The method to setup direct/indirect wind
1 Please press
button.
icon of direct/indirect wind
2 The
blinks on the display, and then, if
pressing
button, direct/indirect
wind icon is fixed and the function
is setup.
direct wind
indirect wind
pressing
3 Ifsetup
mode.
38 Ceiling Cassette Air Conditioner
button, it gets out of
Owner's instruction
The method to cancel direct/indirect wind
1 Please press
button.
icon of direct/indirect wind
2 The
blinks on the display, and then, if
pressing
button, direct/indirect
wind icon is removed and the
function is cancelled.
pressing
3 Ifsetup
mode.
button, it gets out of
After setup, it automatically gets
out of setup mode if there is no
button input for 25 seconds.
When exiting without pressing set button,
the manipulated value is not reflected.
direct wind
indirect wind
• Direct/indirect wind function is additional function and it might not be indicated or
operated at the partial product.
• Direct/indirect wind function is possible only when product is running.
Owner's Manual 39
Owner's instruction
Sub function - Plasma Purification
Only products with humidifying function can use this.
The method to setup cleaning air
pressing
1 Repeat
until
icon flash.
button
or cancel Plasma
2 Operate
Purification function by pressing
(
button.
icon appears/disappears on
display part up
to selection )
setting, press
3 After
to exit.
button
After setup, it automatically gets out of setup
mode if there is no button input for 25 seconds.
When exiting without pressing set button, the
manipulated value is not reflected.
• Cleaning air function is additional function and it might not be indicated or operated at the partial
product.
• Cleaning air function is possible only when product is running.
• If you want independent cleaning air drive, please setup cleaning air by pressing additional drive
button at ventilation drive.
40 Ceiling Cassette Air Conditioner
Owner's instruction
Function setting - Child Lock
It is the function to use preventing children or others from careless using.
button repeatedly until
1 Press
the
is flashing.
moving to 'setup' icon area by
2 Ifusing
button, 'setup' icon
blinks, and child lock function is
setup if pressing
button at
that time.
cancelling lock function, if moving
3 When
to 'cancel' icon by pressing
button
and then, pressing
button, child lock
function is cancelled.
button to exit.
4 Press
After setup, it automatically gets out of
setup mode if there is no button input
for 25 seconds.
When exiting without pressing set
button, the manipulated value is not
reflected.
Owner's Manual 41
Owner's instruction
Function setting - Filter Sign Clear
This function is to clear the indicator of indoor filter cleaning.
1 Press
until the
button repeatedly
is flashing.
the
is flashing, press
2 When
the
to clear this display
• When filter is covered by dust, it will reduce cooling/heating efficiency and accumulate more
electric power. Therefore. do clean the filter whenever cleaning time is expired.
Filter cleaning indication is automatically cancelled without the separate cancellation after certain
period of time.
42 Ceiling Cassette Air Conditioner
Owner's instruction
Function setting - Elevation Grill
This function is to move the indoor filter up/down for cleaning filter.
button
1 Press
Repeat pressing
button until
icon flash.
to descent using
button
2 Move
and press
button will display
descent icon and the up/down grill will
descent.
up/down grill descents to the
3 When
desired position, move to stop icon
suing
button and press
to stop up/down grill.
button
filter cleaning is finished, fix the
4 When
filter to the up/down grill, move to ascent
icon using
button, and press
button to ascent up/down grill.
button to exit.
5 Press
After setup, it automatically
gets out of setup mode if there
is no button input for 60
seconds.
When exiting without pressing set
button, the manipulated value is not
reflected.
• Elevation grill function only operates in the indoor unit with the elevation grill.
Owner's Manual 43
Owner's instruction
Function setting - Vane Angle Control
This function is to adjust angle at which airflow is blow out.
pressing
1 Repeat
icon flash.
button until
button to select active vane :
2 Press
1 / 2 / 3 / 4 / All / Standard
Select Vane number using
buttons.
Vane number : No. 1, 2., 3, 4, all, or
standard
- Selected vane is in operation.
- Please verify the operating vane.
- To set the angle of all the vanes,
select 'all'.
- To set as the factory default settings,
select 'standard'.
wind angle using
3 Select
and press
button.
button,
- The boundary of wind angle settings
can be changed to 5 levels or 6 levels
according to the product.
- When selecting 'standard' for Vane
number, the wind angle does not move.
the wind angles for the remaining
4 Set
vanes as the same as above.
There are products with vanes with
no. 1 and no. 2 only according to the
product types.
5
Press
button to exit.
After setup, it automatically
gets out of setup mode if there
is no button input for 60 seconds.
When exiting without pressing set
button, the manipulated value is not
reflected.
button to complete and
6 Press
active the setting process.
(Airflow direction function will be
released whenever setting vane angle)
button to exit or
7 Press
system will automatically release
without any input after 25
seconds.
44 Ceiling Cassette Air Conditioner
Owner's instruction
Function Setting - Change Temp
Change temperature is the function to setup air-cooling and heating drive automatically changeable
according to the temperature at artificial intelligence drive mode.
1 Repeaticonpressing
flash.
button until
button to change.
2 Press
Converting temp value : 1~7
button to complete
3 Press
and active the setting process.
button to exit or
4 Press
system will automatically
release without any input after
25 seconds.
When exiting without pressing
set button, the manipulated
value is not reflected.
Owner's Manual 45
Owner's instruction
Function setting - Changing Current Time
press function setup
1 Please
button. If pressing function setup
button repeatedly, it moves to
time setup menu. ‘Time setup’
icon is indicated at that time and date
blinks at current time indication area.
Ex) Changing Current Time as
'Monday / AM 10:20'.
2 Press
day.
key to adjust the current
key to move to AM/ PM setting
3 Press
mode (the 'AM/ PM segment will flash).
AM/ PM value by
4 Setting
pressing
button.
button to move to 'Hour'
5 Press
setting mode. (the 'Hour' segment will
flash)
Hour value by pressing
6 Setting
button.
46 Ceiling Cassette Air Conditioner
Owner's instruction
button to move to 'Minute'
7 Press
setting mode. (the 'Minute' segment will
flash)
Minute value by pressing
8 Setting
button.
9 Press
10
button to finish.
In the process, press
button to release and exit
from setting mode.
(In case of exit with
incomplete information, it will return to
the previous setting)
When exiting without pressing set
button, the manipulated value is not
reflected.
Owner's Manual 47
Owner's instruction
Function setting - Auto Cleaning
The method to setup Automatic Drying
1 Please press
button.
to automatic drying menu by
2 Move
pressing
button twice. 'Automatic
Drying' icon will be displayed and the
current status, 'DISABLE' will blink.
to ‘ABLE’ icon area by using
3 If moving
button, ‘ABLE’ icon blinks, and
automatic dry function is setup if pressing
button at that time.
returning to automatic dry no use,
4 When
automatic dry function is cancelled if moving
to ‘DISABLE’ icon by pressing
and then, pressing
button.
pressing
5 Ifmode.
button
button, it gets out of setup
After setup, it automatically gets out of
setup mode if there is no button input
for 60 seconds.
When exiting without pressing set
button, the manipulated value is not
reflected.
• Automatic dry function might not be operated at the partial product.
48 Ceiling Cassette Air Conditioner
Owner's instruction
Programming - Simple Reservation
You can set the reservation conveniently in the units of 1 hour from 1 hour to 7 hours.
button to enter the
1 Press
Programming mode.
(the
segment flashing)
Ex) Setting Simple Reservation
time as '3'.
2 Press
time.
3 Press
button to adjust reservation
button to finish setting.
button to exit.
4 Press
After setup, it automatically gets out of
setup mode if there is no button input
for 25 seconds.
When exiting without pressing set
button, the manipulated value is not
reflected.
When simple reservation setup, product automatically runs or stops after the time that is set.
Owner's Manual 49
Owner's instruction
Programming - Sleep Reservation
Sleep reservation is the function of air-conditioner to run and stop after certain period of time at sleep
mode before sleep. When connected to a ventilation product and set the sleep reservation, when it
goes to the sleep mode, after the set time has elapsed.
button to enter the
1 Press
Programming mode.
Ex) Setting Sleep Reservation
time as '3'.
pressing
button to enter the
2 Repeat
SLEEP reservation setting mode.
(
segment flashing)
3 Press
time.
button to adjust reservation
The SLEEP reservation time is from 1 to
7 hours.
button to finish setting.
4 Press
Whenever reservation is done.
button to exit.
5 Press
After setup, it automatically gets out of
setup mode if there is no button input
for 60 seconds.
When exiting without pressing set
button, the manipulated value is not
reflected.
- If reservation is setup, 'sleep'
indication shows up at the lower part
of LCD screen.
finishing sleep reservation setup, air6 Ifconditioner
product operates sleep drive
and stops after the time that is set.
CAUTION
Please reserve proper time at sleeping. (Too much air-cooling is not good for your health. )
• Because it automatically adjusts desired temperature for comfortable air-cooling at sleep drive,
there could be difference between remote controller's desired temperature and air-conditioner
body's desired temperature.
• Sleep reservation operates as off reservation for the product whose temperature adjustment isn't
controlled by unit of 0.5°C.
50 Ceiling Cassette Air Conditioner
Owner's instruction
Programming - ON Reservation
Automatically turned On at reserved time that you set.
1 Press
button.
Ex) Setting ON Reservation
Time as 'AM 10:20'.
pressing
button to
2 Repeat
enter the ON reservation
setting mode.
(
segment flashing)
3 Press
setting.
button to adjust AM/ PM
button to Hour setting
4 Press
mode. When the Hour icon flash, please
setting time.
The setting range is within 1~12.
button to shift to Minute
5 Press
setting mode. When the Minute icon
flash, please setting minute the setting
range is within 00~59.
6 Press
button to finish setting.
Owner's Manual 51
Owner's instruction
button to exit.
7 Press
After setup, it automatically gets out of
setup mode if there is no button input
for 25 seconds.
When exiting without pressing set
button, the manipulated value is not
reflected.
- If reservation is set, 'turned on'
indication shows up at the lower part
of LCD screen, and air-conditioner
product runs at the time that is set.
- If reservation is cancelled, 'turned on'
indication disappears.
52 Ceiling Cassette Air Conditioner
Owner's instruction
Programming - OFF Reservation
Automatically turned Off at reserved time that you set.
1 Press
button.
Ex) Setting OFF Reservation
Time as 'AM 10:20'.
pressing
button
2 Repeatedly
to enter the OFF reservation
setting mode.
(
segment flashing)
3 Press
setting.
button to adjust AM/ PM
button to shift to Hour
4 Press
setting mode. When the Hour icon flash,
please setting time.
The setting range is within 1~12.
button to shift to Minute
5 Press
setting mode. When the Minute icon
flash, please setting minute the setting
range is within 00~59.
6 Press
button to finish setting.
Owner's Manual 53
Owner's instruction
button to exit.
7 Press
After setup, it automatically gets out of
setup mode if there is no button input
for 25 seconds.
When exiting without pressing set
button, the manipulated value is not
reflected.
- If reservation is set, 'turned off'
indication shows up at the lower part
of LCD screen, and air-conditioner
product runs at the time that is set.
- If reservation is cancelled, 'turned off'
indication disappears.
54 Ceiling Cassette Air Conditioner
Owner's instruction
Programming : Weekly Reservation
You can set the daily reservation in weekly unit .
Weekly reservation keeps operating until before you cancel it once you setup
1
Please move to reservation setup mode by pressing reservation button.
You can setup two weekly reservations for one day, and up to fourteen
reservations for a week.
For example, to setup (Tuesday morning 11:30 turned on ~ afternoon 12:30
turned off), you setup in order below.
move to 'weekly' by
2 Please
repeatedly pressing reservation
button. 'Weekly' blinks at this time.
select weekly reservation
3 Please
or weekly reservation by using
button.
You can setup two reservations,
weekly reservation 1 and weekly
reservation 2, for a day.
move to 'date' setup part by
4 Please
using
button. If 'date'
indication blinks, please setup date.
You can setup date from Monday to
Sunday.
move to 'AM/PM' setup part
5 Please
of turning on by using
button.
move to 'hour' setup part of
6 Please
turning on by using
button.
- It is the part to setup the time at
which air-conditioner is turned on.
change time by using
button.
7 Please
- You can setup hour 0~12.
8 Please move to 'minute' setup part of turning on by using
9 If 'minute' indication blinks, please setup 'minute' by using
button.
button
Owner's Manual 55
Owner's instruction
move to 'AM/PM' setup part
10 Please
of turning off by using
button.
- AM/PM setup is identical with
turning on time setup.
move to 'hour' setup part
11 Please
of turning off by using Right
button.
- It is the part to reserve the time
at which air-conditioner is
turned off.
- If 'hour' indication blinks, please
setup 'hour'.
Please setup 'hour' and 'minute'
identically with the method to
setup turning on time.
finishing weekly reservation setup, please press setup/cancellation button.
12 IfWeekly
reservation setup for the day that you set is finished.
you setup with the method identical with above by selecting the day that
13 Ifyou'd
like to setup, it operates weekly reservation.
If you setup both turning on reservation time and turning off reservation time
identically, it doesn't operate reservation drive.
Weekly reservation explanation
Reservation
number
Tu rning on time
Tu rning off time
Under bar: the indication that there is weekly reservation for
corresponding day
56 Ceiling Cassette Air Conditioner
Owner's instruction
Programming : Holiday Reservation
It automatically stops at reserved day that you set.
press
button.
1 Please
It enters into reservation
setup mode.
move to 'holiday' by repeatedly
2 Please
pressing
button.
move to 'date' that
3 Please
you want to setup holiday
by using
button.
or cancel holiday by using
4 Pleaseorappointbutton.
For example, when you setup
Monday/Friday to holiday
- 'Monday', 'Friday' letter disappears.
press
5 Please
holiday setup.
button if finishing
If it comes to appointed holiday, airconditioner automatically stops.
Once you setup holiday appointment,
until before you cancel holiday setup,
air-conditioner automatically stops
within one hour even though you run
air-conditioner.
Owner's Manual 57
Owner's instruction
Ventilation Product User Manual - Interlinked Air conditioner and Ventilation
1. Control using remote controller where air conditioner indoor unit and the
ventilation product is installed at the same time.
Single Operation
(General Ventilation Single Operation)
General
Ventilation
General
Ventilation
Wired Remote
Controller
(Direct Expansion Ventilation Single Operation)
Direct
Expansion
Ventilation
Interlinked Operation
(General Ventilation Interlinked Operation)
General
Ventilation
Air conditioner
Indoor unit
Wired Remote Controller
(Direct Expansion Ventilation Interlinked Operation)
Direct Expansion
Ventilation
Air conditioner
Indoor unit
Wired Remote
Controller
Wired Remote Controller
Direct
Expansion
Ventilation
Connecting wires is the same as air conditioner user manual. (Refer to page about Group control)
2. Press 'Ventilation' button on the wired remote controller and enter Ventilation
control mode to check the operation of ventilation product.
3. To convert back to air conditioner mode, press 'Ventilation' button at the
ventilation mode.
- If no button pressed for 15 seconds or more at ventilation mode, it automatically converts back to air
conditioner mode.
- Ventilation product represent general ventilation product and direct expansion ventilation product.
58 Ceiling Cassette Air Conditioner
Owner's instruction
Ventilation Product User Manual - Interlinked operation with general ventilation
It is used when air conditioner is interlinked with ventilation product.
It is a function that cools and refreshes indoor air using the ventilation product at the same time
operating the air conditioning function.
Ventilation interlinked operation
button on the remote
1 Press
controller control panel.
- It is only used when air conditioner
and general ventilation is
interlinked.(‘Interlinked operation’ displayed
on the remote controller display)
'Start/Stop' button at ventilation
2 Pressing
mode will start ventilation.
button will change the
3 Pressing
ventilation operation mode.
Pressing operation selection button
will change the mode in the order of
'Heat exchange normal automatic'
It only displays on the remote controller
display when it is in ventilation mode, and it
displays the desired temperature when it
returns to air condition mode.
button in general
4 Pressing
ventilation mode will change airflow
speed.
Pressing airflow speed button will
change the mode in the order of 'weak
strong extra strong'.
If CO2 sensor is installed, it can select from
'weak strong very strong automatic'.
back to air conditioner mode
5 Changing
1)Automatic Conversion : when no button is
pressed for 15 seconds or longer, it
automatically converts back to air
conditioner mode.
2) Manual Conversion : Pressing
button in
ventilation mode will manually convert.
Owner's Manual 59
Owner's instruction
Manual Conversion - Pressing ‘Ventilation’ button in ventilation mode will manually convert
It is a function to cool and refresh the indoor air using general ventilation product..
Ventilation single operation
button on the remote
1 Press
controller.
button will change
2 Pressing
the ventilation mode.
Ventilation Remote Controller
Contents
mode
Display
Heat
Circulate indoor air without loss of heat
exchange
Directly circulate indoor air without going
Normal
through heat exchanger
Circulate indoor air with automatically
Automatic
comparing indoor and outdoor air
button will change
3 Pressing
the strength of the wind
- Pressing the button can select
from 'weak strong very
strong'.
- If CO2 sensor is installed, it can select from
'weak strong very strong automatic'.
60 Ceiling Cassette Air Conditioner
Owner's instruction
Ventilation Product User Manual - Interlinked Operation with Direct Expansion Ventilation
It can only be used when the air conditioner is interlinked with direct expansion ventilation product.
Interlinked Operation with Direct
Expansion Ventilation
button on the remote
1 Press
controller.
- It is used only when air conditioner
and the ventilation product are
interlinked. ('Interlinked operation' displayed
on the remote controller display)
button in ventilation
2 Pressing
mode starts ventilation.
button in ventilation
3 Pressing
mode will change the ventilation
mode.
- Every time the button is pressed,
it changes from 'Heat exchange normal
automatic'.
The display on the remote controller
displays only when it is in ventilation mode,
and when it converts to air conditioner
mode, it displays the desired temperature.
button in ventilation
4 Pressing
mode changes the strength of wind.
- Pressing the button can select from
'weak strong very strong'.
back to air conditioner mode
5 Changing
1) Automatic Conversion : when no button is
pressed for 15 seconds or longer, it
automatically converts back to air
conditioner mode.
2) Manual Conversion : Pressing
button
in ventilation mode will manually convert.
Owner's Manual 61
Owner's instruction
Ventilation Product User Manual - Single Operation with Direct Expansion Ventilation
Pressing It performs ventilation operation with cooling or heating at the same time using the heat
exchanger inside the direct expansion type ventilation product.
Direct expansion type ventilation single operation
button on the remote controller.
1 It displays
as the figure right side in
the direct expansion type ventilation
single operation.
button will change the
2 Pressing
ventilation mode.
Pressing the button converts from 'heat
exchange normal automatic'.
Ventilation Remote Controller
Contents
mode
Display
Heat
Circulate indoor air without loss of heat
exchange
Directly circulate indoor air without going
Normal
through heat exchanger
Circulate indoor air with automatically
Automatic
comparing indoor and outdoor air
The 88 segment display above is only displayed
when it is in direct expansion type ventilation
single operation and the air conditioner is
stopped.
button will change
3 Pressing
operation mode.
- Pressing the button will convert
from 'cooling eating automatic -> stop'.
button in ventilation
4 Pressing
mode changes the strength of wind.
- Pressing the button can select
from 'weak strong very strong'.
Cooling/heating operation selection and the
desired temperature can be adjusted in
direct expansion type ventilation single
operation.
Refer to the basic operation - temperature
adjustment for changing desired
temperature.
62 Ceiling Cassette Air Conditioner
Owner's instruction
Ventilation Product Additional Operations - Fast / Power Saving
It is a function to operate ventilation function more efficiently through the ventilation additional
functions, fast / power saving settings.
Fast : ventilates fast
button in ventilation mode.
1 Press
- It converts in the order of 'fast
power saving' in ventilation mode.
is blinking on the display, and pressing
2 'Fast'button
will stabilize 'fast' icon, and the
function is set.
3 Pressing
settings.
button will exit the
Power Saving : efficiently ventilates and performs
power savings.
button in ventilation mode.
1 Press
- It converts in the order of 'fast
power saving' in ventilation mode.
Saving' is blinking on the display, and
2 'Power
pressing
button will stabilize 'Power
Saving' icon, and the function is set.
3 Pressing
settings.
button will exit the
General ventilation and direct
expansion ventilation have the same
additional functions.
Ventilation/Heater/Humidifier additional
function settings are the same as air
conditioner.
Owner's Manual 63
Owner's instruction
Different mode drive
Different mode drive is a phenomenon taking place when indoor units' drive mode is different in the
case that a few indoor units are set up at one AHU.
(Different mode drive doesn't show up at cooling exclusive model.)
a few indoor units are running air1 While
cooling at one AHU, it doesn't operate heating
drive if one indoor unit operates heating drive.
a few indoor units are running heating
2 While
at one AHU, it doesn't run if one indoor unit
runs cooling or humidity removal.
It is the indication that it is operating heating
drive at AHU.
pressing
button, indoor unit
3 Ifautomatically
runs at the mode that
different indoor units are running
after about 5 seconds and operates.
64 Ceiling Cassette Air Conditioner
Owner's instruction
Checkups before reporting breakdown
Please first check the items below for product's defects before consulting to service center.
Symptoms
Check-up
Management
• Is air-conditioner's power on?
• Please check up circuit breaker.
• Please check up wire remote controller's
setup condition.
• Are air-conditioner and remote
controller properly connected
with cable?
• Please connect air-conditioner and remote
controller cable.
• Is cable connection correct?
• Please check again referring to setup
method at the manual.
• Did you correctly setup time?
• Please set up current time correctly.
• Did you correctly make a
reservation?
• Please set up again referring to the
manual.
It doesn't release
cool wind.
• Is desired temperature setup
lower than current temperature?
• Please set up desired temperature lower
than current temperature.
Air-conditioner
automatically runs
or stops.
• Isn't reservation drive setup?
• Please cancel reservation drive.
Error is indicated
on remote
controller
indication window.
• Does remote controller indication
window indicate 'CH03'?
• Please check again wire remote
controller's setup condition.
• Please check again connection condition
of air-conditioner and remote controller
cable.
It has no power
on.
It doesn't operate
reservation drive.
Owner's Manual 65
Maintenance and Service
Maintenance and Service
CAUTION Before performing any maintenance, turn off the main power to the system.
Indoor Unit
Grille, Case and Remote Control
q Turn the system off before cleanining, To clean, wipe
with a soft, dry cloth. Do not use bleach or abrasives.
NOTICE
Anti-biofilter
Air
Intake
Supply power must be disconnected before cleaning
the indoor unit.
Air Outlet
Wired Remote
Controller (Optional)
Air Filters
The air filters behind the front grille should be
checked and cleaned once every 2 weeks or more
often if neccessary.
Wireless Remote
Controller (Standard)
1 Remove the Air filters.
h Take hold of the tab and pull slightly
forward to remove the filter.
CAUTION: When the air filter is to
Rack
be removed, do not touch the metal
parts of the indoor unit.
It may cause an injury.
Air Filter
n Never use any of the followings:
• Water hotter than 40°C.
Could cause deformation and/or
discoloration.
• Volatile substances.
Could damage the
surfaces of the air
SI
N NER
conditioner.
B
e n zene
2
SCO
U RIN G
C LB
A R GER
Clean dirt from the air filter using a
vacuum cleaner or washing with water.
If dirt is conspicuous, wash with a neutral
detergent in lukewarm water.
If hot water (50°C or more) is used, it may
be deformed.
3 After washing with water, dry well
in the shade.
Do not expose the air filter to direct
sunlight or heat from a fire when
drying it.
4
Install the air filter.
Outdoor Unit
The heat exchanger coils and panel vents of the outdoor unit
should be checked regularly. If clogged with dirt or soot, the
heat exchanger and panel vents may be professionally
steam cleaned.
NOTICE
Dirty or clogged coils will reduce the operating efficiency of the
system and cause higher operating costs.
66 Ceiling Cassette Air Conditioner
Air Intake
(side, rear)
Air Outlet
Connecting Wire
Power Wire
Connection Pipe
Drain Hose
Maintenance and Service
When the air conditioner is not going to be used for a long time.
When air conditioner is not going to be used for a long time.
1. Operate the air conditioner at the following settings for 2 to 3 hours.
• Type of operation: Fan operation mode.
• This will dry out the internal mechanisms.
2. Turn off the breaker.
CAUTION Turn off the circuit breaker when the air conditioner is not going to be used
for a long time. Dirt may collect and may cause a fire.
Helpful information
The air filters and your electric bill.
If the air filters become clogged with dust, the cooling capacity will drop, and 6% of the electricity used to
operate the air conditioner will be wasted.
When the air conditioner is to be used again.
1. Clean the air filter and install it in the indoor unit.
2. Check that the air inlet and outlet of the indoor/outdoor unit are not blocked.
3. Check that the ground wire is connected correctly. It may be connect to the indoor unit side.
Operation Tips
Do not overcool the room.
Keep blinds or curtains
closed.
This is not good for your health
and wastes electricity.
Do not let direct sunshine enter
the room when the air
conditioner is in operation.
Make sure that the doors
and windows are shut tight.
Clean the air filter regularly.
Avoid opening doors and
windows as much as possible
to keep the cool air in the room.
Blockages in the air filter
reduce the airflow and lower
cooling and dehumidifying
effects. Clean at least once
every two weeks.
Keep the room temperature
uniform.
Adjust the vertical and
horizontal airflow direction to
ensure a uniform temperature
in the room.
Ventilate the room
occasionally.
Since windows are kept closed,
it is a good idea to open them
and ventilate the room now and
then.
Owner's Manual 67
Maintenance and Service
Troubleshooting Tips! Save time and money!
Check the following points before requesting repairs or service.... If the fault persists, please contact
your dealer or service center.
Case
Explanation
See page
The air conditioner does not
operate.
• Have you made a mistake in timer operation?
13~28
• Has the fuse blown or has the circuit breaker
been tripped?
-
The room has a peculiar odor.
• Check that this is not a damp smell exuded by
the walls, carpet, furniture, or cloth items in the
room.
-
It seems that condensation is
leaking from the air
conditioner.
• Condensation occurs when the airflow from the
air conditioner cools the warm room air.
Air conditioner does not
operate for about 3 minutes
when restarted.
• This is the protector of the mechanism.
Does not cool or heat
effectively.
• Is the air filter dirty? See air filter cleaning
instructions.
• Wait about three minutes and operation will
begin.
-
24
• The room may have been very hot when the
room air conditioner was first turned on. Allow
time for it to cool down.
The air conditioner operation is
noisy.
• Has the temperature been set incorrectly?
22
• Are the indoor unit's air inlet or outlet vents
obstructed?
-
• For a noise that sounds like water flowing.
-This is the sound of freon flowing inside the air
conditioner unit.
• For a noise that sounds like the compressed air
releasing into atmosphere.
-This is the sound of the dehumidifying water
being processed inside the air conditioning
unit.
-
Remote control display is faint,
or no display at all.
• Are the batteries depleted?
Crack sound is heard.
• This sound is generated by the
expansion/constriction of the front panel, etc.
due to changes of temperature.
-
• Cleaning the filter, press the Timer button and
t button of wired remote controller at the same
time for 3 sec.
-
Filter sign lamp (LED) is ON.
• Are the batteries inserted in the opposite (+)
and (-) directions?
68 Ceiling Cassette Air Conditioner
-
Maintenance and Service
Troubleshooting Tips! Save time and money!
Check the following points before requesting repairs or service.... If the fault persists, please contact
your dealer or service center.
Case
The air conditioner does not
operate.
Explanation
See page
-
• Has the fuse blown or has the circuit breaker
been tripped?
21
• Have you made a mistake in timer operation?
• Is the air filter dirty? See air filter cleaning
instructions.
Does not cool or heat
effectively.
• Wait about three minutes and operation will
begin.
• This is the protector of the mechanism.
Air conditioner does not
operate for about 3 minutes
when restarted.
• Condensation occurs when the airflow from the
air conditioner cools the warm room air.
It seems that condensation is
leaking from the air
conditioner.
• Check that this is not a damp smell exuded by
the walls, carpet, furniture, or cloth items in the
room.
The room has a peculiar odor.
-
-
33
• The room may have been very hot when the
room air conditioner was first turned on. Allow
time for it to cool down.
The air conditioner operation is
noisy.
-
• Are the indoor unit's air inlet or outlet vents
obstructed?
15
• Has the temperature been set incorrectly?
• For a noise that sounds like water flowing.
-This is the sound of freon flowing inside the air
conditioner unit.
• For a noise that sounds like the compressed air
releasing into atmosphere.
-This is the sound of the dehumidifying water
being processed inside the air conditioning
unit.
Remote control display is faint,
or no display at all.
Crack sound is heard.
Filter sign lamp (LED) is ON.
-
• Are the batteries depleted?
• Are the batteries inserted in the opposite (+)
and (-) directions?
• This sound is generated by the
expansion/constriction of the front panel, etc.
due to changes of temperature.
• Cleaning the filter, press the Timer button and
button of wired remote controller at the same
time for 3 sec.
-
-
-
Installation Manual 35
Maintenance and Service
When the air conditioner is not going to be used for a long time.
When air conditioner is not going to be used for a long time.
1. Operate the air conditioner at the following settings for 2 to 3 hours.
• Type of operation: Fan operation mode.
•This will dry out the internal mechanisms.
2. Turn off the breaker.
CAUTION Turn off the circuit breaker when the air conditioner is not going to be used
for a long time. Dirt may collect and may cause a fire.
Helpful information
The air filters and your electiric bill.
If the air filters become clogged with dust, the cooling capacity will drop, and 6% of the electricity used to
operate the air conditioner will be wasted.
When the air conditioner is to be used again.
1. Clean the air filter and install it in the indoor unit.
2. Check that the air inlet and outlet of the indoor/outdoor unit are not blocked.
3. Check that the ground wire is connected correctly. It may be connect to the indoor unit side.
Operation Tips
Do not overcool the room.
Keep blinds or curtains
closed.
Clean the air filter regularly.
Make sure that the doors
and windows are shut tight.
Do not let direct sunshine enter
the room when the air
conditioner is in operation.
This is not good for your health
and wastes electricity.
Avoid opening doors and
Blockages in the air filter
windows as much as possible
reduce the airflow and lower
to keep the cool air in the room. cooling and dehumidifying
effects. Clean at least once
every two weeks.
Keep the room temperature
uniform.
Adjust the vertical and
horizontal airflow direction to
ensure a uniform temperature
in the room.
Ventilate the room
occasionally.
Since windows are kept closed,
it is a good idea to open them
and ventilate the room now and
then.
34 Ceiling Cassette Air Conditioner
Maintenance and Service
Maintenance and Service
CAUTION Before performing any maintenance, turn off the main power to the system.
Indoor Unit
Grille, Case and Remote Controller
❐ Turn the system off before cleanining, To clean, wipe
with a soft, dry cloth. Do not use bleach or abrasives.
NOTICE
Supply power must be disconnected before cleaning
the indoor unit.
SCO
URING
C LB
ARGER
Anti-biofilter
Air
Intake
Air Outlet
Wired Remote
Controller(Optional)
Air Filters
The air filters behind the front grille should be
checked and cleaned once every 2 weeks or more
often if neccessary.
Rack
Air Filter
Never use any of the followings:
• Water hotter than 40°C.
Could cause deformation and/or
discoloration.
•Volatile substances.
Could damage the
SI
NNER
surfaces of the air
Be
nzene
conditioner.
Wireless Remote
Controller
(Standard)
1 Remove the Air filters.
Take hold of the tab and pull slightly
forward to remove the filter.
CAUTION: When the air filter is to
be removed, do not touch the metal
parts of the indoor unit.
It may cause an injury.
2 Clean dirt from the air filter using a
vacuum cleaner or washing with water.
If dirt is conspicuous, wash with a neutral
detergent in lukewarm water.
If hot water (50°C or more) is used, it may
be deformed.
3 After washing with water, dry well
in the shade.
Do not expose the air filter to direct
sunlight or heat from a fire when
drying it.
4
Install the air filter.
Outdoor Unit
The heat exchanger coils and panel vents of the outdoor unit
should be checked regularly. If clogged with dirt or soot, the
heat exchanger and panel vents may be professionally
steam cleaned.
Air Intake
(side, rear)
Connecting Wire
Power Wire
Air Outlet
Connection Pipe
Drain Hose
NOTICE
Dirty or clogged coils will reduce the operating efficiency of the
system and cause higher operating costs.
Installation Manual 33
32 Ceiling Cassette Air Conditioner
Installation
3) Evaluation of the per formance
1. Measure the temperature of the intake
and discharge air.
2. Ensure the difference between the intake
temperature and the discharge one is
more than 8°C (Cooling) or reversely
(Heating).
Thermometer
CAUTION
After the confirmation of the above conditions, prepare the wiring as foll ows:
1) Never fail to have an individual power speciali zed for the air conditione r. As for the metho d
of wiring , be guided by the circuit diagram pasted on the inside of cont rol box cover.
2) Provide a ci rcuit breaker switch between power sou rce and the unit.
3) The screw which fasten the wiring in the casing of electrical fittings are lia ble to come
loose from vibrations to whi ch the unit is subjected during the cou rse of transpo rtation.
Check them and make sure that th ey are all tight ly fastened . (If th ey are loos e, it could
give rise to burn-out of the wires.)
4) Specification of power sou rce
5) Confirm that electrical capacity is sufficient.
6) Be sure that the sta rting volt age is maintained at more than 90 percent of the rated
volt age marked on the name plat e.
7) Confirm that the cable thi ckness is as specified in the power sou rces specification.
(Particular ly note the relation between cable length and thi ckness.)
8) Never fail to equip a leak age breaker where it is wet or moist.
9) The foll owing trou bles would be caused by volt age drop-d own.
• Vibration of a magnetic switch, damage on the contact point there of, fuse breaking,
disturbance to the normal function of a overload protection device.
• Proper starting power is not given to the compressor.
HAND OVER
Teach the customer the operation and maintenance procedures, using the operation manual (air filter cleaning,
temperature control, etc.).
Installation Manual 31
Installation
3. Once the desired vacuum is created. Disconnect the vacuum pump and open the liquid side valve stem
by turning it to counter-clockwise direction with service valve wrench.
4. Open completely the gas side valve buy turning to counter-clockwise with service valve wrench.
5. Remove slowly the charge hose connected to the gas side service port (to release the pressure).
6. Replace back the flare nut and its bonnet on the gas side service port. Fasten the flare nut with
adjustable wrench to prevent any leakage from the system.
7. Fasten back the valve cap on both gas and liquid side service valves.
Test running
1) PRECAUTIONS IN TEST RUN
• The initial power supply must provide at least 90% of the rated voltage.
Otherwise, the air conditioner should not be operated.
CAUTION:
For test run , carry out the cooling operation firstly even during heating season . If heating
operation is carried out firstly, it leads to the trouble of compressor. Then attention must be paid.
Carry out the test run more than 5 minutes without fail.
(Test run will be cancelled 18 minutes later automatical ly)
• The test run is started by pressing the room temperature checking button and down timer button for 3
seconds at the same time.
• To cancel the test run, press any button.
CHECK THE FOLLOWING ITEMS WHEN INSTALL ATION IS COMPLETED
• After completing work, be sure to measure and record trial run properties, and store measured data, etc.
• Measuring items are room temperature, outside temperature, suction temperature, blow out temperature,
wind velocity, wind volume, voltage, current, presence of abnormal vibration and noise, operating pressure,
piping temperature, compressive pressure.
• As to the structure and appearance, check following items.
Is the circulation of air adequate?
Is the draining smooth?
Is the heat insulation complete
(refrigerant and drain piping)?
Is there any leakage of refrigerant?
Is the remote controller switch operated?
Is there any faulty wiring?
Are not terminal screws loosened?
M4......118N.cm{12kgf.cm} M5......196N.cm{20kgf.cm}
M6......245N.cm{25kgf.cm} M8......588N.cm{60kgf.cm}
2) Connection of power supp ly
1. Connect the power supp ly co rd to the independent power supp ly.
• Circuit breaker is required.
2. Operate the unit for 15 mi nutes or mor e.
30 Ceiling Cassette Air Conditioner
Installation Manual 29
28 Ceiling Cassette Air Conditioner
Installation
HEAT INSULATION
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance
(over 120°C).
Fastening band
(accessory)
2. Precautions in high humidity circumstance:
This air conditioner has been tested
according to the "KS Standard Conditions
with Mist" and confirmed that there is not any
default. However, if it is operated for a long
Refrigerant piping
time in high humid atmosphere (dew point
temperature: more than 23°C), water drops
Indoor unit
are liable to fall. In this case, add heat
Thermal insulator
insulation material according to the following
(accessory)
procedure:
• Heat insulation material to be prepared... Adiabatic EPDM or NBR with thickness 10 to 20mm.
• Stick EPDM or NBR on all air conditioners that are located in ceiling atmosphere.
• In addition to the normal heat insulation (thickness: more than 8mm) for refrigerant piping (gas
piping: thick piping) and drain piping, add further 10mm to 30mm thickness material.
FORM THE PIPINGS
1. Wrap the connecting po rtion of indoor
unit with the Insulation material and
secure it with two Plastic Bands . (for the
right pipings)
• If you want to connect an additional drain
hose, the end of the drain-outlet should keep
distance from the ground. (Do not dip it into
water, and fix it on the wall to avoid swinging
in the wind.)
In case of the Outdoor unit being installed
below position of the Indoor unit.
Seal a small opening
around the pipings
with gum type sealer.
Drain hose
Taping
Pipings
Plastic Band
Connecting
cable
Power supply
cord
2. Tape the Pipings , drain hose and
Connecting Cable from bottom to top.
3. Form the pipings gathered by taping
along the exterior wall and fix it onto the
wall by saddle or equivalent.
Trap is required to pre vent water from entering
into electrical parts.
Installation Manual 27
Installation
CAUTION: Install certainly the decorative panel.
Cool air leakage causes sweating.
Water drops fall.
Good example
Bad example
Air conditioner
unit
Air
Ceiling
board
Air conditioner unit
Cool air leakage
(no good)
Ceiling
board
Decorative
panel
Decorative panel
Fit the insulator (this part) and
be careful for cool air leakage
Indoor Unit Drain Piping
Upward
routing
not allowed
Pipe clamp
• Drain piping must have down-slope (1/50 to 1/100): be
sure not to provide up-and-down slope to prevent
reversal flow.
• During drain piping connection, be careful not to exert
extra force on the drain port on the indoor unit.
• The outside diameter of the drain connection on the
indoor unit is 32mm.
Indoor unit
Maintenance
drain port
Piping material: Polyvinyl chloride pipe VP-25
and pipe fittings
1/50~1/100
MAX 800mm
• Be sure to execute heat insulation on the drain piping.
Heat insulation material: Polyethylene foam with thickness more than 8 mm.
Drain test
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
Flexible drain hose
(accessory)
Feed water
Main
drain pipe
Drain
port
Drain Pump
Glue the joint
Drain hose connection
Use the clip (accessory)
• Connect the main drain pipe to the exterior and leave it
provisionally until the test comes to an end.
• Feed water to the flexible drain hose and check the piping for
leakage.
• Be sure to check the drain pump for normal operating and
noise when electrical wiring is complete.
• When the test is complete, connect the flexible drain hose to
the drain port on the indoor unit.
Drain pan
CAUTION: The supplied flexible
drain hose should not be curved,
neither screwed. The curved or screwed
hose may cause a leakage of water.
Flexible drain hose
1/50~1/100
MAX 800mm
26 Ceiling Cassette Air Conditioner
Installation Manual 25
Installation
Installation of Decorative Panel
The decorative panel has its installation direction.
Before installing the decorative panel, always remove the paper template.
1. Remove the packing and take out air inlet
grille from front panel.
Front grille
2. Remove the Corner covers of the panel.
Coner cover
3. Fit the panel on the unit by inserting
hooks as shown in picture.
Hook clip
Hook
4. Insert two screws on diagonal corners of
panel. Do not tighten the bolts completely.
(The fixing screws are included in the
indoor unit box.)
Check the alignment of panel with the
ceiling. Height can be adjusted using
hanging bolts as shown in picture. Insert
the other two screws and tighten all
screws completely.
24 Ceiling Cassette Air Conditioner
Installation
Piping Connection
1. Form the piping according to its routing. Avoid bending and
bending back the same piping point more than three times.
(This will result in hardening the pipe.)
2. After deforming the piping, align centers of the union fitting of
the indoor unit and the piping, and tighten them firmly with
wrenches.
3. Connect pipe to the service valve or ball valve which is located
below the outdoor unit.
4. After completing the piping connection, be sure to check if
there is gas leakage in indoor and outdoor connection.
Liquid side
Indoor
unit
Outdoo r
uni t
Flare connection
Gas side
Flare connection
Vacuum drying
After completing the piping connection, execute vacuum drying for
the connecting piping and the indoor unit.
The vacuum drying must be carried out using the service ports of
both the liquid and gas side valves.
Grade
18k
Liquid side piping Gas side piping
Ø9.52mm
48k
Ø9.52mm
36k
Ø15.88mm
Ø6.35mm
24k
Ø12.7mm
Ø6.35mm
Ø15.88mm
Ø19.05mm
CAUTION: Use two wrenches and
tighten with regular torque.
6.3~8.2 kgf.m
9.9~12.1 kgf.m
Ø19.05mm
3.4~4.2 kgf.m
5.5~6.6 kgf.m
Ø12.7mm
Flare nut fastening torque
1.8~2.5 kgf.m
Ø6.35mm
Ø9.52mm
Ø15.88mm
Spanner
Torque
wrench
Installation Manual 23
Installation
Connecting Pipes to the Indoor Unit
• Preparation of Piping
Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the
following procedure.
Copper
tube
90°
Slanted Uneven Rough
1) Cut the pipes and the cable.
• Use the accessory piping kit or the pipes
purchased locally.
• Measure the distance between the indoor and
the outdoor unit.
• Cut the pipes a little longer than measured
distance.
• Cut the cable 1.5m longer than the pipe length.
Pipe
Reamer
Point down
2) Burrs removal
• Completely remove all burrs from the cut cross
section of pipe/tube.
• Put the end of the copper tube/pipe to downward
direction as you remove burrs in order to avoid to
let burrs drop in the tubing.
Flare nut
Copper tube
3) Putting nut on
• Remove flare nuts attached to indoor and
outdoor units, than put them on pipe/tube having
completed burr removal.
(Not possible to put them on after flaring work)
Handle
Bar
"A"
Bar
Yoke
Cone
4) Flaring work
• Carry out flaring work using flaring tool as shown
below.
Outside diameter
mm
inch
Ø6.35
1/4
Ø9.52
3/8
Ø12.7
1/2
Ø15.88
5/8
Ø19.05
3/4
A
mm
1.1~1.3
1.5~1.7
1.6~1.8
1.6~1.8
1.9~2.1
Copper pipe
Clamp handle
Red arrow mark
Smooth all round
Inside is shining without scratches
= Improper flaring =
Firmly hold copper tube in a bar(or die) as
indicated dimension in the table above.
5) Check
Compare the flared work with figure below.
If flare is noted to be defective, cut off the flared
section and do flaring work again.
• If the piping and the drain hose are in common
direction bundle the piping and the drain hose
together by wrapping them with vinyl tape.
Inclined Surface Cracked Uneven
damaged
thickness
Even length
all round
Indoor unit pipe
Connection pipe
Wrap with vinyl tape
Vinyl tape (wide)
Connecting Cable
Pipe
Vinyl tape(narrow)
22 Ceiling Cassette Air Conditioner
Installation
ELECTRICAL WIRING
1. All wiring must comply with LOCAL REGULATIONS.
2. Select a power source that is capable of supplying the current required by the air conditioner.
3. Feed the power source to the unit via a distribution switch board designed for this purpose.
4. The terminal screws inside the control box may be loose due to vibration during transport.
Check the screws for loose connection.
(Running the air conditioner with loose connection can overload and damage electrical components.)
5. Always ground the air conditioner with a grounding wire and connector to meet the LOCAL REGULATION.
Main power source
Circuit Breaker
Use circuit breaker or time delay fuse.
Switch box
Refrigerant pipe
CONNECTING THE CABLE TO OUTDOOR UNIT
1. Remove the Cover control from the unit by loosening a screw.
Connect the wires to the terminals on the control board
individually as following.
2. Secure the cable onto the control board with the holder
(clamper).
3. Refix the cover control to the original position with the screw.
4. Use a recognized circuit breaker between the power source
and the unit.
a disconnecting device to adequately disconnect all supply
lines must be fitted.
Circuit
Breaker (A)
18k
20
1Ø
Grade
24k
36k
25
20
1Ø
3Ø
Outdoor unit
Terminal block
Over 5mm
Holder for
power supply
cord
Power supply
cord
Connecting
cable
Cover control Holder for
connecting
cable
48k
25
3Ø
Installation Manual 21
Installation
Wiring Diagram for LT-C368NLF0/LT-C368NLF1/LT-C368NLF2 (3 tr)
OUTDOOR WIRING DIAGRAM
COMP
T1
BLACK
MOTOR
1
YELLOW
T3
T2
RD WH BK
BK
ORANGE
RD
CAPACITOR 1
RD
BK
T3
T1 T2
L3
L1 L2
Magnetic
Contactor
A2
A1
18 15
3ø MONITORING
RELAY
L3 L2 L1
TERMINAL C
BL
YL
RD
BL
YL
RD
RD
BK
RD
BK
GN/YL
TERMINAL B
TERMINAL A
1
R
2
S
7
3
T
8
9
L
G
N
N
10
11 12
RD
S
To Indoor From Indoor
(3Ø,415V)
Power Supply (1Ø,230V)
3Ø 415V
Power Supply
RD
LP SWITCH
3854A20396C
Wiring Diagram for LT-C488MLF0 / LT-C488MLF1(4 tr)
OUTDOOR WIRING DIAGRAM
COMP.
T1
T3
BLACK
MOTOR
1
C S R
T2
MOTOR
2
C S R
EBY43304416
YELLOW
ORANGE
YELLOW
TB1
RD WH
BK
RD 7
20 RD
20 RD
L1 L2 L3 A2
MAGNETIC
CONTACTOR
T1
34
RD
RD
34
35
1
T2
T3 A1
BL
YL
RD
YL 2 BL 3 BK 8
BLACK
ORANGE
18 15
CAPACITOR
1
CAPACITOR
2
BK 11
3ø MONITORING
RELAY
L3 L2 L1
BK
6
BK 11
TB2
9
5
4
BK 8
RD
GN
7
RD
8
9
RD YL
10
11
GN
1
12
2
3
4
5
6
TERMINAL B
TERMINAL A
BL BK GN
L
N
G
NORMAL CROSS-SECTIONAL AREA
HP
LP
SWITCH SWITCH
3ø 415V
POWER SUPPLY
T3
BK
BK
T2
TO INDOOR FROM
(1ø,230V) INDOOR
1
C S R
OR
CONNECTOR
U
W
BK
YL
CONNECTOR
RD
CAPACITOR
1
RD
RD
RD
RD
L1
3ø MONITORING
RELAY
L3 L2 L1
T3 A1
10
11
L2
T1
T2
BK
BL
YL
RD
RD
RD
YL
BL
BK
BK
GN/YL
S
R
2
3
4
5
RD
HP
SWITCH
6
T
YL
GN/YL
N
BL
1(L) 2(N)
BK
GN
L
N
3
4
5
6
TERMINAL B
TERMINAL A
TERMINAL B
TERMINAL A
CAPACITOR
RD
18 15
L3 A2
3ø MONITORING
RELAY
L3 L2 L1
T3 A1
BK
RD
GN
1
12
EBY43304442_V1
OR
BK
V
TB1
BK
RD
RD
T2
T1
BL
YL
RD
BK
9
BL BK GN
SPECIFICATION
WIRE NO.
2
5 CORE
7,8,9,10 & 11 3.5 mm
2
3 CORE
1,2,6
1.25 mm
2
1 CORE
3
1.25 mm
FAN
MOTOR
COMP
EBY43304437
YL
RD WH
BK
BL BK
YL
GN
8
RD YL
TO
INDOOR
Wiring Diagram for LT-C488MLF3
Wiring Diagram for LTUC488MLF2
OUTDOOR WIRING DIAGRAM
OUTDOOR WIRING DIAGRAM
MOTOR
COMP.
T1
TB1
RD WH
RD
MAGNETIC
CONTACTOR
18 15
L1 L2 L3 A2
MAGNETIC
CONTACTOR
RD
RD
7
RD
TO
INDOOR
TO INDOOR FROM
INDOOR
UNIT
G
NORMAL CROSS-SECTIONAL AREA
HP
LP
SWITCH SWITCH
3ø 415V
POWER SUPPLY
TO INDOOR FROM
(1ø,230V) INDOOR
NORMAL CROSS-SECTIONAL AREA
SPECIFICATION
WIRE NO.
2
5 CORE
7,8,9,10 & 11 3.5 mm
2
3 CORE
1,2,6
1.25 mm
2
1 CORE
3
1.25 mm
TO
INDOOR
WIRE NO.
415V AC 50Hz 3PHASE
7,8,9,10 & 11
SPECIFICATION
3.5 mm 2
1.0 mm 2
3
1.25 mm 2
1, 2,6
5 CORE
3 CORE
1 CORE
20 Ceiling Cassette Air Conditioner
Installation
Wiring Diagram
Indoor Diagram for all models LT-C186PLF1/F2/F3 (1.5tr), LT-C246PLF0 /LT-C246PLF1/F2 (2 tr)
LT-C368NLF0 /LT-C368NLF1/ LT-C368NLF2 (3tr)
LT-C488MLF1/LT-C488MLF2/LT-C488MLF3(4Tr)
Outdoor Wiring Diagram for LT-C186PLF1/F2/F3 (1.5 tr) & LT-C246PLF0/LT-C246PLF1/F2 (2 tr)
OUTDOOR WIRING DIAGRAM
RD
BK
2
4
Power
6 Relay 8
0
1
RD
Out
Motor
BK
BL
S RD
GR
BK BR
RD
YL
BK
C
COMP
WH
R
H
T/B
GR/YL
1(L) 2(N)
L
N
S
L N
6
4
5
GR/YL
RD
BK
C
F
INPUT MAINS/SUPPLY TO
FROM
(1ø,230V)
INDOOR INDOOR
3854A20298U
WARNING: Make sure that the screws of the terminal are free from
looseness.
Attach insulation sleeve
Round crimp-style terminal
Electricwire
Connect wires of the same gauge to both sides
Installation Manual 19
Installation
Wiring Connection
• Open the control box cover and connect the Remote controller cord and Indoor power wires.
Remote Controller
Cable
Connecting
Cable
1 Phase
18k/24k
1
L
Terminal Block of Outdoor Unit
2 3 4(L) 5(N) 6(S)
Terminal Block of Indoor Unit
1(L)
2(N)
3(S)
N 1ø Power Supply
3 Phase
36k
Terminal Block of Outdoor Unit
1 2(L) 3(N) 4 5 6
N
Terminal Block of
Outdoor Unit
1 2 3
R
Y
Terminal Block of Indoor Unit
1(L)
2(N)
3
B
3ø Power Supply
3 Phase
48k
Terminal Block of Outdoor Unit
1(L) 2(N) 3 4 5 6
7
Terminal Block of Outdoor Unit
8 9 10 11 12
R
Y
B
N
Terminal Block of Indoor Unit
1(L)
2(N)
3
G
3ø Power Supply
CAUTION
The power cord connected to the outdoor unit
should be complied with the IS approved makers.
GN
/Y
2.5mm2
18k/24k
1 Phase
Capacity
L
The connecting cable connected to the indoor and
outdoor unit should be complied with the IS approved
makers
NORMAL
CROSS-SECTIONAL
GN
/Y
L
20
20
mm
mm
0.75mm2
18k/24k/36k
1 Phase
Capacity
48k
Capacity
GN
L
1.25mm2
3 Phase
2.5mm2
36k
/Y
3.5mm2
48k
20
mm
If the supply cord is damaged, it must be replaced
by a special cord or assembly available from the
manufacturer or its service agent.
18 Ceiling Cassette Air Conditioner
Wide LCD Wired Remote Control Installation (Optional)
Installation Manual 17
Operating Instructions
Wide LCD Wired Remote Controller (Optional)
16 Ceiling Cassette Air Conditioner
Operating Instructions
Wireless Remote Controller (Standard)
Installation Manual 15
Installation
The Indoor Unit Installation
Ceiling
Hanging bolt
(W3/8 or M10)
Nut
(W3/8 or M10)
Spring washer
(M10)
Keep the length of the bolt
from the bracket to 40mm
Flat washer for M10
(accessory)
Ceiling board
Flat washer for M10
(accessory)
Nut
(W3/8 or M10)
• The following parts is option.
1 Hanging Bolt
- W 3/8 or M10
2 Nut
- W 3/8 or M10
3 Spring Washer - M10
Plate Washer - M10
Air Conditioner body
150mm
Ceiling board
Keep the length of 15~18mm
between the air conditioner bottom
surface and the ceiling surface
Set screw of
paper model (4 pieces)
Paper model
for installation
Open the ceiling board
along the outer edge of the
paper model
• Drill the piping hole on the wall slightly tilted to the
outdoor side using a Ø 70 hole-core drill.
Wall
4
Outdoor
Indoor
CAUTION: Tighten the nut and
bolt to prevent unit falling.
Slope gradient for drain
Should be 1/50 ~ 1/100
Remote Controller Installation
• Although the room temperature sensor is in the indoor unit, the remote controller should be installed in
such places away from direct sunlight and high humidity.
Installation of the remote controller
• Select places that are not splashed with water.
• Select control position after receiving customer approval.
• The room temperature sensor is built in the indoor unit.
• This remote controller equipped with liquid crystal display. If this position is higher or lower, display is difficult to
see.(The standard height is 1.2 ~ 1.5m high)
Routing of the remote controller cord
• Keep the remote controller cord away from the refrigerant piping and the drain piping.
• To protect the remote controller cord from electrical noise, place the cord at least 5cm away from other power
cables (audio equipment, television set, etc.)
• If the remote controller cord is secured to the wall, provide a trap at the top of the cord to prevent water
droplets from running.
14 Ceiling Cassette Air Conditioner
Installation
Ceiling opening dimensions and hanging bolt location
• The dimensions of the paper model for installing are the same as those of the ceiling opening dimensions.
• Select and mark the position for fixing bolts and
piping hole.
• Decide the position for fixing bolts slightly tilted to
the drain direction after considering the direction of
drain hose.
• Drill the hole for anchor bolt on the ceiling.
• The hole size for four anchor bolts is
Ø 14.5mm & 40mm depth.
671
875
787
840
840
684
CAUTION:
875
Unit: mm
• This air-conditioner uses a drain pump.
• Horizontly install the unit using a level gauge.
• During the installation, care should be taken
not to damage electric wires.
Ceiling
Level gauge
Ceiling board
NOTICE
• Thoroughly study the following installation locations:
1. In such places as restaurants and kitchens, considerable amount of oil steam and flour
adhere to the turbo fan, the fin of the heat exchanger and the drain pump, resulting in heat
exchange reduction, spraying, dispersing of water drops, drain pump malfunction, etc.
In these cases, take the following actions:
• Make sure that the ventilation fan for smoke-collecting hood on a cooking table has
sufficient capacity so that it draws oily steam which should not flow into the suction of the
air conditioner.
• Make enough distance from a cooking room to install the air conditioner in such a place
where it may not suck in oily steam.
Air conditioner
Take enough
distance
Use the ventilation fan
for smoke-collecting
hood with sufficient
capacity.
Cooking table
2. Avoid installing air conditioner in such circumstances where cutting oil mist or iron powder is
in suspension in factories, etc.
3. Avoid places where inflammable gas is generated, flows in, is stored or vented.
4. Avoid places where sulfurous acid gas or corrosive gas is generated.
5. Avoid places near high frequency generators.
Installation Manual 13
Installation
F). Outdoor Unit best location & piping.
The heat exchanger coils and panel vents of the
outdoor unit should be checked regularly. If clogged
with dirt or soot, the heat exchanger and panel vents
may be professionally steam cleaned.
Note:
Dirty or clogged coils will reduce the operating
efficiency of the system and cause higher
operating costs.
OutdoorUnit
Unit
Outdoor
D
(Side)
H
(Rear)
W
Air intake
vents
Control Cover
Connecting Wire
Air outlet
vents
Connection Pipe
Drain Hose
L2
L1
Indoor Unit
D
W
H
Wired
Remote
Controller
(Optional)
Model
LT-C186PLF1/2/3
LT-C246PLF0
LT-C246PLF1/2
LT-C368NLF0
LT-C368NLF1/2
LT-C488MLF0
LT-C488MLF1
LT-C488MLF2/3
Capacity
W
840
840
840
840
840
840
840
840
1.5 tr
2 tr
2 tr
3 tr
3 tr
4 tr
4 tr
4 tr
Indoor Dimension
D
840
840
840
840
840
840
840
840
H
204
204
204
246
246
288
288
288
Wireless
Remote
Controller
(Standard)
Outdoor Dimnesion
D
H
260
555
260
555
260
555
320
655
320
655
400
1135
355
1135
330
834
W
800
800
800
870
870
906
899
950
L1
590
590
590
545
545
606
506
620
L2
305
305
305
350
350
396
390
360
12 Ceiling Cassette Air Conditioner
Installation
3) Piping length and the elevation
Model
LT-C186PLF1
LT-C186PLF2
LT-C186PLF3
LT-C246PLF0
LT-C246PLF1
LT-C246PLF2
LT-C368NLF0
LT-C368NLF1
LT-C368NLF2
LT-C488MLF0
LT-C488MLF1
LT-C488MLF2
LT-C488MLF3
Pipe Size
mm(inch)
Length A(m)
Standard
Max.
Elevation B(m)
5
30
7.5
19.05(3/4") 9.52(3/8")
5
30
7.5
15.88 (5/8") 9.52(3/8")
7.5
15.88 (5/8") 6.35(1/4")
7.5
6.35(1/4")
12.7 (1/2")
Liquid
Gas
30
30
Standard
5
5
Outdoor unit
Indoor unit
A
B
Outdoor unit
Max.
15
15
15
15
*Additional
refrigerant
(g/m)
20
25
50
50
Outdoor unit
Oil trap
A
A
B
B
Indoor unit
Indoor unit
If piping length is more than 10m
CAUTION:
• Rated performance for refrigerant line length of:7.5m
• Capacity is based on standard length and maximum allowance length is on the
basis of reliability.
• Improper refrigerant charge may result in abnormal cycle.
• Oil trap should be installed every 10 meters.
Model Weight
1.5 Ton
LT-C186PLF1/LT-C186PLF2/
LT-C186PLF3
LT-C246PLF0/LT-C246PLF1/
LT-C246PLF2
LT-C368NLF0
Capacity
Model
Weight(kg)
46.00
20
42.00
20
Outdoor
Indoor(Front panel)
2.0 Ton
60.00
23.3
3.0 Ton
LT-C368NLF1
60.00
56.00
LT-C368NLF2
LT-C488MLF0
LT-C488MLF1
LT-C488MLF2
LT-C488MLF3
92.00
85.00
76.00
70.00
25.6
4.0 Ton
Installation Manual 11
Installation
Installation of Indoor, Outdoor Unit
Selection of the best location
1) Indoor unit
• There should not be any heat source or steam
near the unit.
• There should not be any obstacles to prevent
the air circulation.
• A place where air circulation in the room will
be good.
• A place where drainage can be easily
obtained.
• A place where noise prevention is taken into
consideration.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows from
the wall, ceiling, or other obstacles.
• The indoor unit must keep the maintenance
space.
2) Outdoor unit
• If an awning is built over the unit to prevent
direct sunlight or rain exposure, be careful that
heat radiation from the condenser is not
restricted.
• There should not be any animals or plants
which could be affected by hot air discharged.
• Ensure the spaces indicated by arrows from
the wall, ceiling, fence or other obstacles.
Ceiling
Ceiling Board
500 or
more
1000
or more
Above 2500
4000 or less
300 or more
Ceiling Board
500 or
more
300 or less
Unit:mm
Floor
S
u
n
roo
f
More than
300mm
More than
More
than
300mm
300mmm
Fe
o nc
b
stae or
cle
s
More than 600mm
More than 700mm
10 Ceiling Cassette Air Conditioner
Wired
(Optional)
Wireless
Remote
(Standard)
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, etc.
• There is risk of fire, electric
shock, or damage to the plastic
parts of the product.
Safety Precautions
Do not touch the metal parts of
the product when removing the
air filter. They are very sharp!
• There is risk of personal injury.
x
Wa Thinner
Do not step on or put anyting
on the product. (outdoor
units)
• There is risk of personal injury
and failure of product.
Do not drink the water
drained from the product.
• It is not sanitary and could cause
serious health issues.
Always insert the filter securely.
Clean the filter every two weeks or
more often if necessary.
• A dirty filter reduces the
efficiency of the air conditioner
and could cause product
malfunction or damage.
Use a firm stool or ladder
when cleaning or maintaining
the product.
• Be careful and avoid personal
injury.
Do not recharge or disassemble the batteries.
Do not dispose of batteries in a fire.
• They may burn or explode.
Do not insert hands or other objects
through the air inlet or outlet while the
product is operated.
• There are sharp and moving
parts that could cause personal
injury.
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 explosion
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.
Installation Manual 7
Safety Precautions
When the product is not 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 could step on
or fall onto the outdoor unit.
• This could result in personal injury and product
damage.
Installation
Always check for gas (refrigerant)
leakage after installation or repair
of product.
• Low refrigerant levels may cause
failure of product.
Install the drain hose to
ensure that water is drained
away properly.
• A bad connection may cause
water leakage.
Keep level even when
installing the product.
• To avoid vibration or water
leakage.
90
Do not install the product where the
noise or hot air from the outdoor unit
could damage the neighborhoods.
• It may cause a problem for your
neighbors.
Use two or more people to 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.
Corrosion, particularly on the condenser
and evaporator fins, could cause product
malfunction or inefficient operation.
Operation
Do not expose the skin directly to cool air for
long periods of time.
(Don't sit in the draft.)
• This could harm to your health.
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.
6 Ceiling Cassette Air Conditioner
Do not allow water to run into
electric parts.
• It may cause There is risk of fire,
failure of the product, or electric
shock.
Do not store or use flammable
gas or combustibles near the
product.
• There is risk of fire or failure of
product.
Safety Precautions
Do not use the product in a
tightly closed space for a long
time.
• Oxygen deficiency could occur.
Gasolin
When the product is soaked
(flooded or submerged),
contact an Authorized Service
Center.
• There is risk of fire or electric
shock.
Do not open the inlet grill 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, or small or
smoke comes from product. Turn the
breaker off or disconnect the power
supply cable.
• There is risk of electric shock or
fire.
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
Ventilate the product from time to time when
operating it together with a stove, etc.
• There is risk of fire or electric shock.
Stop operation and close the window in
storm or hurricane. If possible, remove
the product from the window before the
hurricane arrives.
• There is risk of property damage,
failure of product, or electric
shock.
Be cautious that water could
not enter the product.
• There is risk of fire, electric shock,
or product damage.
Turn the main power off when cleaning or
maintaining the product.
• There is risk of electric shock.
Installation Manual 5
Safety Precautions
Do not install the product on a
defective installation stand.
• It may cause injury, accident, or
damage to the product.
For installation , always contact the dealer or
an Authori zed Service Cente r.
• There is risk of fire, electric
shock, explosion, or injury.
Do not install, remove, or reinstall the unit by yourself
(customer).
• There is risk of fire, electric
shock, explosion, or injury.
• There is risk of fire or electric
shock.
Do not modify or extend the
power cable.
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.
Be sure the installation area
does not deteriorate with age.
• If the base collapses, the air
conditioner could fall with it,
causing property damage,
product failure, and personal
injury.
Operation
Do not let the air conditioner run for a long Take care to ensure that power
time when the humidity is very high and a
cable could not be pulled out or
door or a window is left open.
damaged during operation.
• Moisture may condense and wet • There is risk of fire or electric
or damage furniture.
shock.
Do not plug or unplug the
power supply plug during
operation.
• There is risk of fire or electric
shock.
Do not touch(operate) the
product with wet hands.
• There is risk of fire or electrical
shock.
Do not place anything on the
power cable.
• There is risk of fire or electric
shock.
Do not place a heater or other
appliances near the power
cable.
• There is risk of fire and electric
shock.
4 Ceiling Cassette Air Conditioner
Safety Precautions
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.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
Installation
Do not use a defective or
underrated circuit breaker. Use
this appliance on a dedicated
circuit.
• 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.
For electrical work, contact
Always ground the product.
the dealer, seller, a qualified
electrician, or an Authorized
Service Center.
• Do not disassemble or repair the • There is risk of fire or electric
product. There is risk of fire or
shock.
electric shock.
Always install a dedicated
circuit and breaker.
• Improper wiring or installation
may cause fire or electric shock
Use the correctly rated breaker
or fuse.
• There is risk of fire or electric
shock.
Installation Manual 3
Ceiling Cassette Air Conditioner Installation Manual
TABLE OF CONTENTS
Installation
Requirements
Required Parts
Pipes: Gas side
Liquid side
Introduction ...................................8
Connecting cable
Safety Precautions ........................ 3
Symbols used in this Manual.........8
Features.......................................8
Installation ......................................9
Required Tools
Horizontal meter
Screw driver
Electric drill
Torque Wrenches
Additional Drain hose
(Inner Dia.............32mm)
Flaring Tools set
Insulated drain hose
Hole core drill (ø70mm)
Hanging Bolt
(W 3/8 or M10 length 650mm)
Installation Tools ............................9
Hexagonal Wrench (4mm, 5mm)
Gas-leak detector
Installation of Indoor,
Outdoor Unit ................................10
Owner’s Manual
Installation Manual
Wireless Remote Controller
Thermometer
(Standard) ....................................... 15
Operation Instructions ................ 15
Wired Remote Controller
(Optional) ....................................... 16
Operation Instructions ................ 16
Wiring Connection ....................... 18
Air Purging ................................... 28
Installation Guide at Sea Side...... 32
Maintenance & Services ..............33
2 Ceiling Cassette Air Conditioner
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.
TYPE : Highlander Ceiling Cassette Air Conditioner
For Single Ceiling Cassette models
P/No : MFL62865706_v2
MFL62865706
CUSTOMER CARE
1800-180-3575 (Toll Free)
CALL
12 x 7 (9:00 AM – 9:00 PM)
CLICK
www.lg.com/in/support
cac.service@lgepartner.com
To know more about LG, visit www.lg.com
For Corporate/Instutional enquiries,
please write to enquiries@lgindia.com
Regd. Office : LG Electronics India Pvt. Ltd., A Wing (3rd Floor), D-3, District Center, Saket, New Delhi - 110017
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