LG MFL68686515 User manual

Ceiling Cassette
Original instruction
[Representative] LG Electronics Inc. EU Representative : LG Electronics European Shared
Service Center B.V. Krijgsman 1, 1186 DM Amstelveen, The Netherlands
[Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu,
Changwon-si, Gyeongsangnam-do, KOREA
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.
INSTALLATION MANUAL
AIR
CONDITIONER
www.lg.com
MFL68686515
Rev.03_062520
Copyright © 2017 - 2020 LG Electronics Inc. All Rights Reserved.
РУССКИЙ ЯЗЫК
УКРАÏНСЬКА
ҚАЗАҚ ТІЛІ
БЕЛАРУСКАЯ МОВА
OʻZBEK TILI
BAHASA INDONESIA
Tiếng Việt TÜRKÇE
ENGLISH ITALIANO ESPAÑOL
FRANÇAIS
DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ

2Indoor Unit
Table of contents
3 INSTALLATION PARTS
4 SAFETY INSTRUCTIONS
12 INSTALLATION
12 Selection of the best location
14 Ceiling dimension and hanging bolt location
17 Wiring Connection
20 Installation of Decoration Panel (4 Way)
21 Installation of Decoration Panel (2 Way)
22 Installation of Decoration Panel (1 Way)
23 Drain Piping
24 Ceiling Height Selection
25 DIP Switch Setting
26 Group Control Setting
31 Model Designation
31 Airborne Noise Emission
31 Limiting concentration
TABLE OF CONTENTS

Installation Manual 3
Installation Parts
ENGLISH
Air filter
Air
Intake
Air Outlet Wired Remote Controller
(Accessory)
Air
Intake
Air Outlet Wired Remote Controller
(Accessory)
Air filter
Wired Remote Controller
(Accessory) Wired Remote Controller (Accessory)
Air
Intake Air
Intake
Air Outlet
Air Outlet
Air Outlet
Air Intake
Wired Remote Controller
(Accessory)
Air filter
Air
Intake
Wired Remote Controller
(Accessory)
Air filter
Air Outlet
Installation Parts
Name
Quantity
Shape
Clamp metal
2 EA
Drain hose
1 EA
for gas pipe
for liquid pipe
Insulation for
fitting
1 SET8 EA
Washer for
hanging Bracket Clamp
(Tie Wrap)
4 EA
• Screws for fixing panels are attached to decoration panel.
Installation Tool

4Indoor Unit
Safety Instructions
Safety Instructions
The following symbols are displayed on indoor and outdoor units.
Installation
• Compliance with national gas regulations shall be observed.
• Do not use a defective or underrated circuit breaker. Use
this appliance on a dedicated circuit.
- There is risk of fire or electric shock.
WARNING
!
Read the precautions in
this manual carefully
before operating the unit.
This appliance is filled
with flammable refrigerant
(for R32)
This symbol indicates that
the Operation Manual
should be read carefully.
This symbol indicates that
a service personnel
should be handling this
equipment with reference
to the Installation Manual.
The following safety guidelines are intended to prevent
unforeseen risks or damage from unsafe or incorrect
operation of the appliance.
The guidelines are separated into ‘WARNING’ and
‘CAUTION’ as described below.
WARNING
This indicates that the failure to follow the instructions can
cause serious injury or death.
CAUTION
This indicates that the failure to follow the instructions can
cause the minor injury or damage to the product.
!
!
This symbol is displayed to indicate matters and
operations that can cause risk.
Read the part with this symbol carefully and follow the
instructions in order to avoid risk.
!

Installation Manual 5
Safety Instructions
ENGLISH
• 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.
• Always ground the product.
- 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.
• 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.
• Do not modify or extend the power cable.
- There is risk of fire or electric shock.
• Do not install, remove, or re-install the unit by yourself
(customer).
- There is risk of fire, electric shock, explosion, or injury.
• Be cautious when unpacking and installing the product.
- Sharp edges could cause injury. Be especially careful of
the case edges and the fins on the condenser and
evaporator.
• For installation, always contact the dealer or an Authorized
Service Center.
- There is risk of fire, electric shock, explosion, or injury.
• Do not install the product on a defective installation stand.
- It may cause injury, accident, or damage to the product.
• 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.
• Do not turn on the breaker or power under condition that
front panel, cabinet, top cover, control box cover are
removed or opened.
- Otherwise, it may cause fire, electric shock, explosion or
death.

6Indoor Unit
Safety Instructions
• Use a vacuum pump or Inert (nitrogen) gas when doing
leakage test or air purge. Do not compress air or Oxygen
and Do not use Flammable gases. Otherwise, it may cause
fire or explosion.
- There is the risk of death, injury, fire or explosion.
• Have all electric work done by a licensed electrician
according to "Electric Facility Engineering Standard" and
"Interior Wire Regulations" and the instructions given in this
manual and always use a special circuit.
- If the power source capacity is inadequate or electric work
is performed improperly, electric shock or fire may result.
• Always Install a dedicated circuit and breaker.
- Improper wiring or installation may cause fire or electric
shock.
• The appliance shall be stored in a well-ventilated area
where the room size corresponds to the room area as
specified for operation. (for R32)
• The appliance shall be stored in a room without continuously
operating ignition sources (for example: open flames, an
operating gas appliance or an operating electric heater.)
• Keep any required ventilation openings clear of obstruction.
• Mechanical connections shall be accessible for maintenance
purposes.
• To prevent the mixing of different types of refrigerants, be
sure to check the type of refrigerant used in the outdoor unit.
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.
• Take care to ensure that power cable could not be pulled out
or damaged during operation.
- There is risk of fire or electric shock.
• Do not place anything on the power cable.
- There is risk of fire or electric shock.

Installation Manual 7
Safety Instructions
ENGLISH
• 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 a heater or other appliances near the power
cable.
- There is risk of fire and electric shock.
• Do not allow water to run into electric parts.
- 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.
• 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.
• If strange sounds, smell or smoke comes from product. Turn
the breaker off or disconnect the power supply cable.
- There is risk of electric shock or fire.
• 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.
• 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.
• When the product is soaked (flooded or submerged),
contact an Authorized Service Center.
- There is risk of fire or electric shock.

8Indoor Unit
Safety Instructions
• Be cautious that water could not enter the product.
- There is risk of fire, electric shock, or product damage.
• Ventilate the product from time to time when operating it
together with a stove, etc.
- There is risk of fire or electric shock.
• Turn the main power off when cleaning or maintaining the
product.
- There is risk of electric shock.
• 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.
• When mechanical connectors are reused indoors, sealing
parts shall be renewed. (for R32)
• When flared joints are reused indoors, the flare part shall be
re-fabricated. (for R32)
• Periodic ( more than once/year ) cleaning of the dust or salt
particles stuck on the heat exchanger by using water.
• Do not use means to accelerate the defrosting process or to
clean, other than those recommended by the manufacturer.
• Do not pierce or burn refrigerant cycle part.
• Be aware that refrigerants may not contain an odour.
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.
CAUTION
!

Installation Manual 9
Safety Instructions
ENGLISH
• Keep level even when installing the product.
- To avoid vibration or water leakage.
• 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.
• Any person who is involved with working on or breaking into
a refrigerant circuit should hold a current valid certificate
from an industry-accredited assessment authority, which
authorises their competence to handle refrigerants safely in
accordance with an industry recognised assessment
specification. (for R32)
• The appliance shall be stored so as to prevent mechanical
damage from occurring.
• Refrigerant tubing shall be protected or enclosed to avoid
damage.
• Flexible refrigerant connectors (such as connecting lines
between the indoor and outdoor unit) that may be displaced
during normal operations shall be protected against
mechanical damage.
• The installation of pipe-work shall be kept to a minimum.
• Pipe-work shall be protected from physical damage.
• A brazed, welded, or mechanical connection shall be made
before opening the valves to permit refrigerant to flow
between the refrigerating system parts.
• Dismantling the unit, treatment of the refrigerant oil and
eventual parts should be done in accordance with local and
national standards.
• Means for disconnection must be incorporated in the fixed
wiring in accordance with the wiring rules.

10 Indoor Unit
Safety Instructions
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.
• 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.
• Do not step on or put anything on the product. (outdoor
units)
- There is risk of personal injury and failure of product.
• Always insert the filter securely. 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.
• 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.
• 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.
- Be careful and avoid personal injury.

Installation Manual 11
Safety Instructions
ENGLISH
• 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.
• 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.
• If you eat the liquid from the batteries, brush your teeth and
see doctor. Do not use the remote if the batteries have
leaked.
- The chemicals in batteries could cause burns or other
health hazards.
• Servicing shall only be performed as recommended by the
equipment manufacturer. Maintenance and repair requiring
the assistance of other skilled personnel shall be carried out
under the supervision of the person competent in the use of
flammable refrigerants. (for R32)
• If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualified persons
in order to avoid a hazard.

12 Indoor Unit
Installation
• If the temperature might rise above 30 ℃ or the humidity might rise above RH 80 %, use another insulation to
the indoor body.
hUse glass wool material or polyethylene foam and make sure at least 10 mm thick.
• There should not be any heat source or steam near the unit.
• There should not be any obstacles to 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 have the maintenance space.
• The basic installation for the round type should be in an exposed area.
• Do not install at a non exposed installation site such as areas with ceiling texture.
Read completely, then follow step by step.
Unit:mm
Ceiling
Above 2 500
4 200 or less
1 000
or more
500 or
more
10 or more
500 or
more
300 or less
Floor
F FF F
CAUTION
In case that the unit is installed near the sea, the installation parts may be corroded by salt.
The installation parts (and the unit) should be taken appropriate anti-corrosion measures.
!
hPlease use an annexed sheet or the corrugated
cardboard on the bottom of packing as
installation sheet.
hWhen using the bottom sheet, please use it after
separating the installation sheet from packing of
the product floor by using a knife etc as a picture
below.
Annexed sheet
Or
Packing corrugated
cardboard on the
bottom
Selection of the best location
Installation
1,2,4 Way Round
Unit:mm
Floor
Ceiling Ceiling board
C ≥ 500
C ≥ 500
D ≥ 1 000
B ≥ 10
E ≥ 300
A
F
F
Model A
4 Way
1.6~10.0 kW 2 000 < A ≤ 3 600
10.0~14.5 kW 2 500 < A ≤ 4 200
2 Way 1 800 < A ≤ 3 300
1 Way 1 800 < A ≤ 3 300
Flat washer for M10
(accessory)
Flat washer for M10
(accessory)
Hanging bolt
(W3/8 or M10)
Nut
(W3/8 or M10)
Nut
(W3/8 or M10)
Ceiling board
Ceiling board
• The following parts are local purchasing.
①Hanging Bolt - W 3/8 or M10
②Nut - W 3/8 or M10
③Spring Washer - M10
④Plate Washer - M10
F

Installation Manual 13
Installation
ENGLISH
- The appliance shall be installed, operated and stored in a room with a floor area larger than the
minimum area.
- Use the graph of table to determine the minimum area.
- m : Total refrigerant amount in the system
- Total refrigerant amount : factory refrigerant charge + additional refrigerant amount
- Amin : minimum area for installation
Minimum floor area
0
100
200
300
400
500
600
Amin (m2)
m (kg)
0 1.224 2 3 4 5 6 7 8
Floor standing
Wall mounted
Ceiling mounted
Floor location
m (kg) Amin (m2)
< 1.224 -
1.224 12.9
1.4 16.82
1.6 21.97
1.8 27.80
2 34.32
2.2 41.53
2.4 49.42
2.6 58.00
2.8 67.27
3 77.22
3.2 87.86
3.4 99.19
3.6 111.20
3.8 123.90
4 137.29
4.2 151.36
4.4 166.12
Floor location
m (kg) Amin (m2)
4.6 181.56
4.8 197.70
5 214.51
5.2 232.02
5.4 250.21
5.6 269.09
5.8 288.65
6 308.90
6.2 329.84
6.4 351.46
6.6 373.77
6.8 396.76
7 420.45
7.2 444.81
7.4 469.87
7.6 495.61
7.8 522.04
Wall mounted
m (kg) Amin (m2)
< 1.224 -
1.224 1.43
1.4 1.87
1.6 2.44
1.8 3.09
2 3.81
2.2 4.61
2.4 5.49
2.6 6.44
2.8 7.47
3 8.58
3.2 9.76
3.4 11.02
3.6 12.36
3.8 13.77
4 15.25
4.2 16.82
4.4 18.46
Wall mounted
m (kg) Amin (m2)
4.6 20.17
4.8 21.97
5 23.83
5.2 25.78
5.4 27.80
5.6 29.90
5.8 32.07
6 34.32
6.2 36.65
6.4 39.05
6.6 41.53
6.8 44.08
7 46.72
7.2 49.42
7.4 52.21
7.6 55.07
7.8 58.00
Ceiling Mounted
m (kg) Amin (m2)
< 1.224 -
1.224 0.956
1.4 1.25
1.6 1.63
1.8 2.07
2 2.55
2.2 3.09
2.4 3.68
2.6 4.31
2.8 5.00
3 5.74
3.2 6.54
3.4 7.38
3.6 8.27
3.8 9.22
4 10.21
4.2 11.26
4.4 12.36
Ceiling Mounted
m (kg) Amin (m2)
4.6 13.50
4.8 14.70
5 15.96
5.2 17.26
5.4 18.61
5.6 20.01
5.8 21.47
6 22.98
6.2 24.53
6.4 26.14
6.6 27.80
6.8 29.51
7 31.27
7.2 33.09
7.4 34.95
7.6 36.86
7.8 38.83
(for R32)

14 Indoor Unit
Installation
Ceiling dimension and hanging bolt location
Unit:mm
TM/TN/TP/TM-A/TP-B Chassis
875(Ceiling opening)
787(Hanging bolt)
684
(Hanging bolt)
671
875(Ceiling opening)
840 Unit size
840 Unit size
Unit:mm
TQ/TR Chassis
585~660(Ceiling opening)
517
461
517
585~660(Ceiling opening)
523
570
570
319
Ceiling board
Level gauge
Ceiling
• The dimensions of the paper model for installation are the same as those of the ceiling opening dimensions.
(Unit: mm)
TT Chassis
TU Chassis
1 285(Hanging bolt)
1 385(Ceiling opening)
50
250
600 50
466
(Ceiling opening)
1 180
448
600
250
965(Hanging bolt)
1 065(Ceiling opening)
50 50
860
448
306 400 4040
400 4040 306
354
(Hanging bolt)
466
(Ceiling opening)
354
(Hanging bolt)
410(Hanging bolt)
600
116
642 (Ceiling opening)
unit: mm
1 033 (Ceiling opening)
855 (Hanging bolt)
830
60
TS Chassis
4 Way
2 Way
TY Chassis
650
650
650
650
(Hanging bolt)
unit: mm
Round
1 Way

Installation Manual 15
Installation
ENGLISH
• Avoid the following installation location.
1. Such places as restaurants and kitchen where considerable amount of oil steam and flour is generated.
These may cause heat exchange efficiency reduction, or water drops, drain pump mal-function.
In these cases, take the following actions;
• Make sure that ventilation fan is enough to cover all noxious gases from this place.
• Ensure enough distance from the cooking room to install the air conditioner in such a place where it may
not suck oily steam.
2. Avoid Installing air conditioner in such places where cooking oil or iron powder is generated.
3. Avoid places where inflammable gas is generated.
4. Avoid place where noxious gas is
generated.
5. Avoid places near high frequency
generators.
NOTICE
CAUTION
• This air-conditioner uses a drain pump.
• Install the unit horizontally using a level
gauge.
• During the installation, care should be taken
not to damage electric wires.
• 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 wall.
!
Use the ventilation fan
for smoke-collecting
hood with sufficient
capacity.
Cooking table
Air conditioner
Take enough
distance

16 Indoor Unit
Installation
Set screw of
paper pattern (4 pieces)
Paper pattern
for installation
90 mm
Adjust the
same height
Ceiling board
Ceiling
Open the ceiling board
along the outer edge of the
paper pattern
Air Conditioner body
Ceiling boardCeiling board Ceiling board
Keep the length of the bolt
from the bracket to 40 mm
Set screw of
paper pattern (4 pieces)
Paper pattern
for installation
70 mm
Adjust the
same height
Ceiling board
Ceiling
Open the ceiling board
along the outer edge of the
paper pattern
Air Conditioner body
Ceiling boardCeiling board Ceiling board
Keep the length of the bolt
from the bracket to 40 mm
Set screw of
paper model (4 pieces)
Paper model
for installation
Ceiling board
105 mm(TM, TM-A, TN, TP, TP-B chassis),
180 mm(TQ,TR chassis)
Ceiling board
Ceiling
Keep the length of the bolt
from the bracket to 40 mm
Open the ceiling board
along the outer edge of the
paper model
Air Conditioner body
Keep the length of 15 mm(TM, TM-A, TN,
TP, TP-B chassis), 31~34 mm(TQ,TR
chassis) between the air conditioner
bottom surface and the ceiling surface
Ceiling board
Ceiling board
4 Way
Ceiling
Air Conditioner body
Keep the length of the bolt
from the bracket to 40 mm
Round
2 Way
1 Way

Installation Manual 17
Installation
ENGLISH
Power supply cord
Transmission cord
Remote controller cord
Power supply cord
Transmission cord
Remote
controller cord
Power supply cord
Transmission cord
Remote
controller cord
Clamp CordRemote Controller Connector
(CN-REMO) Clamp Cord Remote Controller Connector (CN-REMO)
<TM/TN/TP>
Round
<TY>
Round
<TY>
<TM-A/TP-B>
4 Way
<TM/TN/TP> <TM-A/TP-B>
• Connect the wires to the terminals on the control box individually according to the outdoor unit connection.
• Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of indoor unit
respectively.
Wiring Connection
CAUTION
• Tighten the nut and bolt to prevent the unit from falling.
• When mechanical connectors are reused indoors, sealing parts shall be renewed. (for R32)
• When flared joints are reused indoors, the flare part shall be re-fabricated. (for R32)
!
• While connecting wired remote controller, insertits connector to the "CN-REMO" housing of the main PCBA
and make the remote controller cord tightly by using clamp cord.
4 Way
Remote controller cord
Power supply cord
Transmission cord
Wired remote controller
connector

18 Indoor Unit
Installation
4 Way
Terminal Block
Indoor
BB4A
3A
Terminal Block of outdoor unit
SODU IDU DRY1 DRY2 GND 12 V
COMMUNICATION LINE(IDU-ODU)
- - - - - -
Terminal Block
Indoor
INDOOR
POWER UNIT
L(L1) N(L2)
• TY Chassis
• TS Chassis
• TQ/TR Chassis
• TM/TN/TP Chassis
COMMUNICATION LINE(IDU-ODU)
Terminal Block
Indoor
L(L1) N(L2)
INDOOR
POWER INPUT
ABA - - --BABGND 12 VDRY2DRY1INTERNET
Terminal Block of outdoor unit
IDUSODU
Outdoor
Unit
Terminal Block
Indoor
L(L3) N(L4)
TO AIR
FRESH KIT
Terminal Block
Indoor
AB
INDOOR
POWER INPUT
Terminal Block Indoor
1(L) 2(N) 3 4
INDOOR
POWER INPUT
A----BABAB
GND 12 V DRY2DRY1 INTERNET
Terminal Block of outdoor unit
IDUSODU Outdoor
Unit
• TM-A/TP-B(*B4) Chassis
COMMUNICATION LINE(IDU-ODU)
Terminal Block
Indoor
L(L1) N(L2)
ABA - - --B--
-- GND 12 VDRY2DRY1
Terminal Block of outdoor unit
IDUSODU
Outdoor
Unit
Terminal Block
Indoor
3(A) 4(B)
• TM-A(*A4) Chassis
COMMUNICATION LINE(IDU-ODU)
Terminal Block
Indoor
L(L1) N(L2)
INDOOR
POWER INPUT
ABA - - --B--
-- GND 12 VDRY2DRY1
Terminal Block of outdoor unit
IDUSODU
Outdoor
Unit
Terminal Block
Indoor Terminal Block Indoor
3(A) 4(B)
Terminal Block
Indoor
Terminal
Block
Indoor
Terminal Block of outdoor unit
1(L) 2(N) 3 4
INDOOR POWER INPUT
B
SODU IDU INTERNET DRY1 DRY2 GND 12 V
BA A B A - - - -
Outdoor
unit
Outdoor
unit
Round
2 Way

Installation Manual 19
Installation
ENGLISH
WARNING
Make sure that the screws of the terminal are free from looseness.
!
CAUTION
The Power cord connected to the unit should be selected according to the following
specifications.
!
CAUTION
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have separate power specially for the air conditioner. As for the method of wiring, follow the circuit
diagram pasted on the inside of control box cover.
2) Provide a circuit breaker switch between power source and the unit.
3) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to
which the unit is subjected during the course of transportation. Check them and make sure that they are all
tightly fastened. (If they are loose, it could give rise to burn-out of the wires.)
4) Confirm the Specification of power source
5) Confirm that electrical capacity is sufficient.
6) Be sure that the starting voltage is maintained at more than 90 % of the rated voltage marked on the name plate.
7) Confirm that the cable thickness is as specified in the power sources specification.
(Particularly note the relation between cable length and thickness.)
8) Do not install the leakage breaker in a place which is wet or moist.
Water or moist may cause short circuit.
9) The following troubles would be caused by voltage drop-down.
• 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.)
!
※Resistance measurement position for incorrect wiring. (TY / 4 / 2 / 1 Way)
• Communication and Power Cable (TY / 4 / 2 / 1 Way)
1. Communication Cable : CVV-SB 1.0~1.5x2C
2. Power Cable : H07RN-F 1.5x3C
• TU/TT Chassis
Outdoor
unit
Terminal Block Indoor
1(L) 2(N) 3 4
INDOOR
POWER INPUT
A----BABAB
GND 12 VDRY2DRY1INTERNET
Terminal Block of outdoor unit
IDUSODU
1 Way

20 Indoor Unit
Installation
1. Temporarily fix two decoration panel fixing screws (hexagon M5 screw) on the unit body. (Tighten by
amount 10 mm in length.)
The fixing screws (hexagon M5 screw) are included the indoor unit box.
2. Remove the air inlet grille from the decoration panel. (Remove the hook for the air inlet grille cord.)
3. Hook the decoration panel key hole ( ) on the screws fixed in step above, and slide the panel so
that the screws reach the key hole edge.
4. Retighten completely two temporarily fixed screws and other two screws. (Total 4 screws)
5. Connect the louver motor connector and display connector.
6. After tightening these screws, install the air inlet grille (including the air filter).
The decoration panel has its installation
direction.
Before installing the decoration panel,
always remove the paper template.
Air conditioner
unit
Ceiling
board
Decoration panel Decoration
panel
Fit the insulator (this part) and
be careful for cool air leakage
Good example
Air
Cool air leakage
(no good)
Bad example
Ceiling
board
Air conditioner unit
CAUTION
Install certainly the
decoration panel.
Cool air leakage causes
sweating.
Water drops fall.
!
Decoration panel fixing screws
(hexagon M5 screws)
Temporally fitting at 2 places
(Tightening about 10 mm)
Air conditioner unit
Decoration panel
Control box cover
Piping side
Louver motor
Display
Lead wire for
louver motor and
display
Decoration panel fixing screws
(Hexagon M5 screw)
Inlet GrilleInlet GrilleInlet Grille
Installation of Decoration Panel (4 Way)