INSTALLATION MANUAL
SYSTEM Inverter Air Conditioners
MODELS
Ceiling-mounted Duct type
FXMQ30MVJU
FXMQ36MVJU
FXMQ48MVJU
Ceiling-mounted Built-in type
FXSQ12MVJU
FXSQ18MVJU
FXSQ24MVJU
FXSQ30MVJU
FXSQ36MVJU
FXSQ48MVJU
Read these instructions carefully before installation.
Keep this manual in a handy place for future reference.
This manual should be left with the equipment owner.
SAFETY CONSIDERATIONS 2
BEFORE INSTALLATION 3
SELECTING INSTALLATION SITE 4
PREPARATIONS BEFORE INSTALLATION 5
INDOOR UNIT INSTALLATION 5
REFRIGERANT PIPING WORK 6
DRAIN PIPING WORK 7
ELECTRIC WIRING WORK 7
WIRING EXAMPLE AND HOW TO SET THE REMOTE CONTROLLER 8
SELECTING INSTALLATION SITE 11
PREPARATIONS BEFORE INSTALLATION 11
INDOOR UNIT INSTALLATION 12
REFRIGERANT PIPING WORK 12
DRAIN PIPING WORK 14
ELECTRIC WIRING WORK 15
WIRING EXAMPLE AND HOW TO SET THE REMOTE CONTROLLER 16
FIELD SETTING 19
TEST OPERATION 19
1
VRV SYSTEM Inverter Air Conditioners
CONTENTS
1. SAFETY CONSIDERATIONS ......................................... 2
2. BEFORE INSTALLATION ............................................... 3
FXMQ30/36/48MVJU
3.SELECTING INSTALLATION SITE................................ 4
4.PREPARATIONS BEFORE INSTALLATION ................. 5
5.INDOOR UNIT INSTALLATION ..................................... 5
6.REFRIGERANT PIPING WORK .................................... 6
7.DRAIN PIPING WORK................................................... 7
8.ELECTRIC WIRING WORK ........................................... 7
9.WIRING EXAMPLE AND HOW TO SET
THE REMOTE CONTROLLER ...................................... 8
FXSQ12/18/24/30/36/48MVJU
3.SELECTING INSTALLATION SITE ............................. 11
4.PREPARATIONS BEFORE INSTALLATION ............... 11
5.INDOOR UNIT INSTALLATION ................................... 12
6.REFRIGERANT PIPING WORK .................................. 12
7.DRAIN PIPING WORK................................................. 14
8.ELECTRIC WIRING WORK ......................................... 15
9.WIRING EXAMPLE AND HOW TO SET
THE REMOTE CONTROLLER .................................... 16
COMMON ITEM
10. FIELD SETTING............................................................ 19
11. TEST OPERATION ....................................................... 19
1.
SAFETY CONSIDERATIONS
Please read these “SAFETY CONSIDERATIONS” carefully
before installing air conditioning equipment and be sure to
install it correctly. After completing the installation, make sure
that the unit operates properly during the start-up operation.
Please instruct the customer on how to operate the unit and
keep it maintained.
Also, inform customers that they should store this installation
manual along with the operation manual for future reference.
This air conditioner comes under the term “appliances not
accessible to the general public”.
Meaning of warning, caution and note symbols.
WARNING ............ Indication a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION ............. Indication a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury. It
may also be sued to alert against
unsafe practices.
NOTE .................... Indication situation that may result in
equipment or property-damage-only
accidents.
2
Installation manual
WARNING
• Ask your dealer or qualified personnel to carry out
installation work. Do not try to install the machine by
yourself.
Improper installation may result in water leakage, electric
shocks or fire.
• Perform installation work in accordance with this
installation manual.
Improper installation may result in water leakage, electric
shocks or fire.
• When installing the unit in a small room, take measures against to keep refrigerant concentration from
exceeding allowable safety limits in the event of refrigerant leakage.
Contact the place of purchase for more information. Excessive
refrigerant in a closed ambient can lead to oxygen deficiency.
• Be sure to use only the specified accessories and
parts for installation work.
Failure to use the specified parts may result in water leakage,
electric shocks, fire or the unit falling.
• Install the air conditioner on a foundation strong
enough to withstand the weight of the unit.
A foundation of insufficient strength may result in the equipment falling and causing injuries.
• Carry out the specified installation work after taking
into account strong winds, typhoons or earthquakes.
Improper installation work may result in the equipment falling
and causing accidents.
• Make sure that a separate power supply circuit is provided for this unit and that all electrical work is carried
out by qualified personnel according to local laws and
regulations and this installation manual.
An insufficient power supply capacity or improper electrical
construction may lead to electric shocks or fire.
• Make sure that all wiring is secured, the specified
wires and used, and no external forces act on the terminal connections or wires.
Improper connections or installation may result in fire.
• When wiring the power supply and connecting the
remote controller wiring and transmission wiring,
position the wires so that the electric parts box lid can
be securely fastened.
Improper positioning of the electric parts box lid may result in
electric shocks, fire or the terminals overheating.
• If the refrigerant gas leaks during installation, ventilate
the area immediately.
Toxic gas may be produced if the refrigerant gas comes into
contact with fire.
• After completing the installation work, check that the
refrigerant gas does not leak.
Toxic gas may be produced if the refrigerant gas leaks into
the room and comes into contact with a source of fire, such
as a fan heater, stove or cooker.
• Before touching electrical parts, turn off the unit.
• Ground the air conditioner. Do not connect the ground
wire to gas or water pipes, lightning rod or a telephone
ground wire.
Incomplete grounding may result in electric shocks.
• Do not touch the switch with wet fingers.
Touching a switch with wet fingers can cause electric shock.
• Install an leak circuit breaker, as required.
If an leak circuit breaker is not installed, electric shock may
result.
• Do not install the air conditioner in the following locations:
(a) where a mineral oil mist or an oil spray or vapor is produced, for example in a kitchen Plastic parts may deteriorate
and fall off or result in water leakage.
(b) where corrosive gas, such as sulfurous acid gas, is produced Corroding copper pipes or soldered parts may result
in refrigerant leakage.
(c) near machinery emitting electromagnetic waves Electromagnetic waves may disturb the operation of the control system and result in a malfunction of the equipment.
(d) where flammable gases may leak, where there are carbon fiber or ignitable dust suspensions in the air, or where
volatile flammables such as thinner or gasoline are handled.
Operating the unit in such conditions may result in fire.
CAUTION
• While following the instructions in this installation manual, install drain piping in order to ensure proper drainage and insulate piping in order to prevent
condensation.
Improper drain piping may result in water leakage and property damage.
• Do not touch the heat exchanger fins.
Improper handling may result in injury.
• Be very careful about product transportation.
Some products use PP bands for packaging. Do not use any
PP bands for a means of transportation. It is dangerous.
• Safely dispose of the packing materials.
Packing materials, such as nails and other metal or wooden
parts, may cause stabs or other injuries.
Tear apart and throw away plastic packaging bags so that
children will not play with them. If children play with a plastic
bag which was not torn apart, they face the risk of suffocation.
• Do not turn off the power immediately after stopping
operation.
Always wait at least five minutes before turning off the power.
Otherwise, water leakage and trouble may occur.
NOTE
• Install the indoor and outdoor units, power supply wiring and connecting wires at least 3.5ft. away from televisions or radios in order to prevent image interference or
noise.
(Depending on the radio waves, a distance of 3.5ft. may not
be sufficient enough to eliminate the noise.)
• Remote controller (wireless kit) transmitting distance
can result shorter than expected in rooms with electronic fluorescent lamps. (inverter or rapid start types)
Install the indoor unit as far away from fluorescent lamps as
possible.
• This unit is a class A product.
In a domestic environment this product may cause radio
interference in which case the user may be required to take
adequate measures.
• Dismantling of the unit, treatment of the refrigerant, oil
and eventual other parts, should be done in accordance
with the relevant local and national regulations.
2.
• Be sure to check the type of R410A refrigerant to be used
before installing the unit. (Using an incorrect refrigerant will
prevent normal operation of the unit.)
• The accessories needed for installation must be retained in
your custody until the installation work is completed. Do not
discard them!
• Decide upon a line of transport.
• Leave the unit inside its packaging while moving, until reaching the installation site. Where unpacking is unavoidable, use
a sling of soft material or protective plates together with a
rope when lifting, to avoid damage or scratches to the unit.
• When moving the unit at or affter opening, hold the unit by
the hanger brackets (× 4). Do not apply force to the refrigerant piping, drain piping or plastic parts.
• For the installation of an outdoor unit, refer to the installation
manual attached to the outdoor unit.
• Do not install or operate the unit in rooms mentioned below.
• Laden with mineral oil, or filled with oil vapor or spray
like in kitchens. (Plastic parts may deteriorate which
could eventually cause the unit to fall out of place, or
could lead to leaks.)
• Where corrosive gas like sulfurous gas exists. (Copper tubing and brazed spots may corrode which could
eventually lead to refrigerant leaks.)
• Where exposed to combustible gases and where volatile flammable gas like thinner or gasoline is used.
(Gas in the vicinity of the unit could ignite.)
• Where machines can generate electromagnetic
waves. (Control system may malfunction.)
• Where the air contains high levels of salt such as that
near the ocean and where voltage fluctuates greatly
such as that in factories.
Also in vehicles or vessels.
• This unit, both indoor and outdoor, is suitable for installation in a
commercial and light industrial environment.
If installed as a household appliance it could cause electromagnetic interference.
NOTE
• Be sure to read this manual before installing the indoor unit.
• Entrust installation to the place of purchase or a qualified serviceman. Improper installation could lead to leaks and, in
worse cases, electric shock of fire.
• Use only parts provided with the unit or parts satisfying
required specifications. Unspecified parts could cause the
unit to fall out of place, or could lead to leaks and, in worse
cases, electric shock or fire.
• Be sure to mount an air filter (part to be procured in the field)
in the suction air passage in order to prevent water leaking,
etc.
BEFORE INSTALLATION
• When moving the unit while removing it from the carton
box, be sure to lift it by holding on to the four lifting lugs
without exerting any pressure on other parts, especially,
the refrigerant piping, drain piping, and other resin parts.
3
b. Items to be checked at time of delivery
Also review the “SAFETY CONSIDERATIONS”
FXMQ30MVJU FXMQ48MVJU
FXMQ36MVJU
2-1
Items to be checked
ACCESSORIES
Check the following accessories are included with your
unit.
Name
Metal
clamp
Drain
hose
Insulation for
fitting
Sealing pad
Quantity
1 pc.
1 pc.
1 each.
1 each.
Shape
Large
for gas pipe
Mid
for liquid pipe
Name
Clamp
Screws for duct flanges
Quantity
6 pcs.
As described in table below
Shape
2-2
(Other)
• Operation
manual
• Installation
manual
• Washers
for hanger
bracket
(8 pcs.)
OPTIONAL ACCESSORIES
Table 1
Remote controller
Wired type
BRC1C71
FOR THE FOLLOWING ITEMS, TAKE SPECIAL
CARE DURING CONSTRUCTION AND CHECK
AFTER INSTALLATION IS FINISHED.
a. Items to be checked after completion of work
Items to be checked
If not properly done, what is
likely to occur.
Are the indoor and outdoor unit The units may drop, vibrate or
fixed firmly?
make noise.
Is the gas leak test finished?
It may result in insuffcient cooling.
Is the unit fully insulated?
Condensate water may drip.
Does drainage flow smoothly?
Condensate water may drip.
Does the power supply voltage
The unit may malfunction or
correspond to that shown on
the components burn out.
the name plate?
Are wiring and piping correct?
The unit may malfunction or
the components burn out.
Is the unit safely grounded?
Dangerous at electric leakage.
Is wiring size according to
specifications?
The unit may malfunction or
the components burn out.
Is something blocking the air
outlet or inlet of either the
indoor or outdoor units?
It may result in insufficient cooling.
Are refrigerant piping length
and additional refrigerant
charge noted down?
The refrigerant charge in the
system is not clear.
4
Check
Did you explain about operations while showing the operation
manual to your customer?
Check
Did you hand the operation manual over to your customer?
c. Points for explanation about operations
The items with WARNING and CAUTION marks in the operation
manual are the items pertaining to possibillties for bodily injury and
material damage in addition to the general usage of the product.
Accordingly, it is necessary that you make a full explanation about
the described contents and also ask your customers to read the operation manual.
2-3
NOTE TO INSTALLER
• Be sure to instruct customers how to properly operate the
unit (especially cleaning filters, operating different functions,
and adjusting the temperature) by having them carry out
operations themselves while looking at the manual.
3.
SELECTING INSTALLATION SITE
Please attach additional thermal insulation material to the unit
body when it is believed that the relative humidity in the ceiling
exceeds 80%. Use glass wool, polyethylene foam, or similar
with a thickness of 3/8”. or more as thermal insulation material.
(1) Select an installation site where the following conditions are
fulfilled and that meets with your customer’s approval.
• In the upper space (including the back of the ceiling) of the
indoor unit where there is no possible dripping of water
from the refrigerant pipe, drain pipe, water pipe, etc.
• Where optimum air distribution can be ensured.
• Where nothing blocks the air passage.
• Where condensate can be properly drained.
• If supporting structural members are not strong enough
to take the unit’s weight, the unit could fall out of place
and cause serious injury.
• Where the false ceiling is not noticeably on an incline.
• Where there is no risk of flammable gas leakage.
• Where sufficient clearance for maintenance and service
can be ensured. (Refer to Fig. 1)
• Where piping between indoor and outdoor units is possible within the allowable limit. (Refer to the installation
manual of the outdoor unit.)
NOTE
• Install the indoor and outdoor units, power supply wiring and
connecting wires at least 3.5ft. away from televisions or
radios in order to prevent image interference or noise.
(Depending on the radio waves, a distance of 3.5ft. may not
be sufficient enough to eliminate the noise.)
(2) Use suspension bolts for installation. Check whether
the ceiling is strong enough to support the weight of
the unit or not. If there is a risk, reinforce the ceiling
before installing the unit.
5.
INDOOR UNIT INSTALLATION
Installing optional accessories before installing the indoor
unit is easier.
As for the parts to be used for installation work, be sure to use
the provided accessories and specified parts designated by our
company.
(1) Fix the hanger bracket to the suspension bolt. Tighten both
upper and lower nuts firmly using washers.
4.
PREPARATIONS BEFORE INSTALLATION
(1) Relative positions of indoor unit and suspension bolt.
(Refer to Fig. 2)
(2) Adjust the height of the unit.
(3) Make sure the unit is
level.
• Level the unit with
a level when
installing. If the unit
is not level, it could
become the source
of water leaks.
• When leveling the
unit, check all four
corners with a level
or a vinyl tube containing water. (See
the figure on the
right.)
(4) Tighten the nuts on the top.
NOTE
Setting the unit at an angle opposite to the drain piping
might cause leaks.
(2) Install a canvass duct to the air discharge outlet and air inlet
so that vibration from the machine body isn’t transmitted to
the duct or ceiling.
You should also apply acoustic (insulation material) to the
inside of the duct, and vibration insulation rubber to the suspension bolts.
(3) Install suspension bolts.
(Use bolts of 3/8” diameter.)
• Install the equipment where supporting structures are
strong enough to bear the equipment’s weight. Use
embedded inserts or anchor bolts with new buildings and
hole-in-anchors with old buildings.
5
6.
REFRIGERANT PIPING WORK
6-1
GENERAL INSTRUCTIONS
• For refrigerant piping of outdoor units, see the installation
manual attached to the outdoor unit.
• Before refrigerant piping work, check which type of refrigerant is used. Proper operation is not possible if the types of
refrigerant are not the same.
• The outdoor unit is charged with refrigerant.
NOTE
• Use a pipe cutter and flare suitable for the type of refrigerant.
• To prevent dust, moisuture or other foreign matter from infiltrating
the tube, either pinch the end or cover it with tape.
• Do not allow anything other than the designated refrigerant
to get mixed into the refrigerant circuit, such as air, etc. If any
refrigerant gas leaks while working on the unit, ventilate the
room thoroughly right away.
6-2
Not recommendable but in case of emergency
You must use a torque wrench but if you are obliged to
install the unit without a torque wrench, you may
follow the installation method mentioned below.
After the work is finished, make sure to check that
there is no gas leak.
When you keep on tightening the flare nut with a spanner,
there is a point where the tightening torque
suddenly increases. From that position, further tighten the
flare nut the angle shown below:
Table 3
Connecting the refrigerant piping
• When connecting the flare nut, coat the flare both inside and
outside with ester oil or ether oil and initially tighten by hand 3
or 4 turns before tightening firmly.
• To prevent flare nut cracking and gas leaks, be sure to use
both a spanner and torque wrench together, as shown in the
drawing below, when connecting or disconnecting pipes to/
from the unit.
6-3
Pipe size
Further tightening
angle
Recommended arm length of
tool (in.)
φ 1/4”
60 to 90 degrees
Approx. 5 7/8
φ 3/8”
60 to 90 degrees
Approx. 7 7/8
φ 1/2”
30 to 60 degrees
Approx. 9 13/16
φ 5/8”
30 to 60 degrees
Approx. 11 13/16
Piping insulation
• Execute heat insulation work completely on both sides of the
gas piping and the liquid piping. Otherwise, a water leakage
can result sometimes.
• When using a heat pump, the temperature of the gas piping
can reach up to approximately 250°F, so use insulation
which is sufficiently resistant.
• Also, in cases where the temperature and humidity of the refrigerant piping sections might exceed 86°F or RH80%, reinforce
the refrigerant insulation. (13/16” or thicker) Condensation may
form on the surface of the insulating material.
• Check the pipe connector for gas leaks, then insulate it as
shown in the drawing below.
• Make absolutely sure to execute heat insulation works on the
pipe-connecting section after checking gas leakage by thoroughly studying the following figure and using the attached
heat insulating materials for fitting. (Fasten both ends with
the clamps (accessory).)
• Wrap the sealing pad (accessory) only around the insulation
for the joints on the gas piping side.
• Refer to the Table 2 for the dimensions of flare nut spaces.
• Refer to the Table 2 to determine the proper tightening torque.
Table 2
Pipe
size
Tightening torque
(ft.lbf)
Flare
dimensions
A (in.)
φ 1/4”
10.4 – 12.7
0.342-0.358
φ 3/8”
24.1 – 29.4
0.504-0.520
φ 1/2”
36.5 – 44.5
0.638-0.654
φ 5/8”
45.6 – 55.6
0.760-0.776
Flare shape (in.)
NOTE
• Apply ester oil or ether oil around the flare portions before
connecting.
• The flare nuts used must be those included with the main
body.
• Over-tightening may damage the flare and cause a refrigerant leakage.
6
CAUTION
Be sure to insulate any field piping all the way to the piping
connection inside the unit. Any exposed piping may cause
condensation or burns if touched.
6-4
Brazing referigerant piping
• Before brazing local refrigerant piping, nitrogen gas shall be
blown through the piping to expel air from the piping.
If your brazing is done without nitrogen gas blowing, a large
amount of oxide film develops inside the piping, and could
cause system malfunction.
• When brazing the refrigerant piping, only begin brazing after
having carried out nitrogen substitution or while inserting
nitrogen into the refrigerant piping. Once this is done, connect the indoor unit with a flared or a flanged connection.
• Nitrogen should be set to 2.9psi. with a pressure-reducing
valve if brazing while inserting nitrogen into the piping.
• There is negative pressure inside the unit relative to atmospheric pressure when the unit is running, so be sure to
provide condensate trap on the condensate outlet. (See
the figure)
• In order to prevent foreign matter from building up
inside the piping, you should avoid curves as much
as possible, and arrange so the trap can be cleaned.
NOTE
Do not use flux when brazing refrigerant piping. Therefore,
use the phosphor copper brazing filter metal (BCuP) which
does not require flux.
(Flux has extremely harmful infulence on refrigerant piping
sysems. For instance, if the chlorine based flux is used, it
will cause pipe corrosion or, in particular, if the flux contains
fluorine, it will damage the refrigerant oil.)
7.
DRAIN PIPING WORK
〈〈Rig the drain pipe as shown below and take measures
against condensation. Improperly rigged piping could lead
to leaks and eventually wet furniture and belongings.〉〉
〈〈Insulate the drain piping inside the building.〉〉
(1) Carry out the drain piping.
NOTE
• If converging multiple drain pipes, install according to the procedure shown below. (Install a condensate trap for each
indoor unit.)
(2) After piping work is finished, check drainage flows
smoothly.
3
• Add approximately 61in of water slowly from the air inlet
and check drainage flow.
NOTE
• Drain piping connections
Do not connect the drain piping directly to sewage pipes that
smell of ammonia. The ammonia in the sewage might enter
the indoor unit through the drain pipes and corrode the heat
exchanger.
8.
8-1
• Keep piping as short as possible and slope it downwards
so that air may not remain trapped inside the pipe.
• Keep pipe size equal to or greater than that of the connecting pipe (Vinyl pipe of 1 “ nominal diam. and 1 1/4”
outer diam.).
• Use the attached drain hose and clamp.
Tighten the clamp firmly.
• Insulate the metal clamp with the sealing pad.
ELECTRIC WIRING WORK
GENERAL INSTRUCTIONS
• All field supplied parts and materials and electric works must
conform to local codes.
• Use copper wire only.
• For electric wiring work, refer to also “Wiring diagram label”
attached to the electric parts box lid.
• For remote controller wiring details, refer to the installation
manual attached to the remote controller.
• All wiring must be performed by an authorized electrician.
• This system consists of multiple indoor units. Mark each
indoor unit as unit A, unit B..., and be sure the terminal board
wiring to the outdoor unit and BS unit are properly matched.
If wiring and piping between the outdoor unit and an indoor
unit are mismatched, the system may cause a malfunction.
• A circuit breaker capable of shutting down power supply to
the entire system must be installed.
• Refer to the installation manual attached to the outdoor unit
for the size of power supply wiring connected to the outdoor
unit, the capacity of the circuit breaker and switch, and wiring
instructions.
• Be sure to ground the air conditioner.
• Do not connect the ground wire to gas and water pipes, lightning rods, or telephone ground wires.
7
• Gas pipes : might cause explosions or fire if gas leaks.
• Water pipes : no grounding effect if hard vinyl piping is
used.
• Telephone ground wires or lightning rods : might cause
abnormally high electric potential in the ground during
lighting storms.
8-2
ELECTRICAL CHARACTERISTICS
Power supply
Fan motor
MCA MFA
W
FLA
Units
Model
Hz Volts
FXMQ30MVJU
FXMQ36MVJU
FXMQ48MVJU
60
208230
Voltage
range
Max. 253
Min. 187
1.6
15
160
1.3
2.9
15
270
2.4
4.4
15
430
3.5
MCA: Min. Circuit Amps (A); MFA: Max. Fuse Amps (A)
kW: Fan Motor Rated Output (W); FLA: Full Load Amps (A)
8-3
SPECIFICATIONS FOR FIELD SUPPLIED
FUSES AND WIRE
Power supply wiring
Model
Field fuses
FXMQ30MVJU
FXMQ36MVJU
FXMQ48MVJU
15A
Size
Wire size
must comply
with local
codes.
Remote controller wiring
Transmission wiring
Wire
Sheathed
wire
(2 wire)
Size
AWG
18-16
NOTE
1. Allowable length of transmission wiring between indoor/
outdoor units and between the indoor unit and the remote
controller is as follows.
(1) Outdoor unit – Indoor unit:
Max. 3280ft. (Total wiring length: 6560ft.)
(2) Indoor unit – Remote controller:
Max. 1640ft.
9.
9-1
WIRING EXAMPLE AND HOW TO SET
THE REMOTE CONTROLLER
HOW TO CONNECT WIRINGS
(Remove the electric parts box lid and wire as shown in the figure below.)
CAUTION
• Be sure to attach the sealing material or putty (field supplied)
to hole of wiring to prevent the infiltration of water as well as
any insects and other small creatures from outside. Otherwise a short-circuit may occur inside the electric parts box.
• When clamping the wires, be sure no pressure is applied to
the wire connections by using the included clamping material
to make appropriate clamps. Also, when wiring, make sure
the lid on the electric parts box fits snugly by arranging the
wires neatly and attaching the electric parts box lid firmly.
When attaching the electric parts box lid, make sure no wires
get caught in the edges. Pass wiring through the wiring
through holes to prevent damage to them.
• Make sure the remote controller wiring, the wiring between
the units, and other electrical wiring do not pass through the
same locations outside of the unit, separating them by at
least 1 15/16”, otherwise electrical noise (external static)
could cause mistaken operation or breakage.
NOTE
1. Use round crimp-style terminals for connecting wires to the
power supply terminal block.
If unavailable, observe the following points when wiring.
• Do not connect wires of different gauge to the same
power supply terminal.
(Looseness in the connection may cause overheating.)
• Use the specified electric wire. Connect the wire securely
to the terminal. Lock the wire down without applying
excessive force to the terminal. (Tightening torque:
0.97ft.lbf ±10 %)
2. Tightening torque for the terminal screws.
• Use the correct screwdriver for tightening the terminal
screws. If the blade of screwdriver is too small, the head
of the screw might be damaged, and the screw will not be
properly tightened.
• If the terminal screws are tightened too hard, screws
might be damaged.
8
• Refer to the table below for the tightening torque of the
terminal screws.
3. Do not connect wires of different gauge to the same grounding terminal. Looseness in the connection may deteriorate
protection.
4. Outside of the unit, keep transmission wiring at least
1 15/16” away from power supply wiring. The equipment
may malfunction if subjected to electrical (external) noise.
5. For remote controller wiring, refer to the “INSTALLATION
MANUAL OF REMOTE CONTROLLER” attached to the
remote controller.
6. Never connect power supply wiring to the terminal
block for remote controller wiring. A mistake of the sort
could damage the entire system.
7. Use only specified wire and tightly connect wires to terminals. Be careful wires do not place external stress on terminals. Keep wiring in neat order and so as not to obstruct
other equipment such as popping open the electric parts
box lid. Make sure the lid closes tight. Incomplete connections could result in overheating, and in worse case, electric
shock or fire.
Continued to “COMMON ITEM” (P18)
9
FXSQ12MVJU
FXSQ18MVJU
FXSQ24MVJU
FXSQ30MVJU
FXSQ36MVJU
FXSQ48MVJU
2-1
a. Items to be checked after completion of work
2-1 ACCESSORIES
Check the following accessories are included with your unit.
Name
Metal
clamp
Paper pattern
for installation
Drain hose
Insulation for
fitting
Quantity
1 pc.
1 pc.
1 pc.
1 each.
for gas pipe
Shape
for liquid pipe
Name
Sealing pad
Screws for duct flanges
Quantity
1 each
1 set
Large
Shape
mid
Name
Quantity
Washer
for hanger
bracket
Clamp
8 pcs.
6 pcs.
Screws for
fixing the
paper pattern for
installation
6 pcs.
Shape
(Other)
• Operation manual
• Installation manual
• Sealing material
(Small 1 3/8×5 7/8)
(2 pcs.)
• Screws for fixing panels are attached to decoration panel.
2-2 OPTIONAL ACCESSORIES
• Parts listed on the below table are required with this indoor
unit.
Table 1
Model
FXSQ12MVJU
FXSQ18MVJU
FXSQ24MVJU
FXSQ30 · 36 · 48MVJU
Min. height
above ceiling
(in.)
16 3/4
or more ∗
13 3/4
or more
16 3/4
or more ∗
13 3/4
or more
16 3/4
or more ∗
13 3/4
or more
16 3/4
or more ∗
13 3/4
or more
Air inlet panel
Color
White
BYBS32DJW1
Canvas connection for
air inlet
panel
Installation
not required
KSAJ25K36
BYBS45DJW1
Installation
not required
KSAJ25K56
BYBS71DJW1
Installation
not required
KSAJ25K80
BYBS125DJW1
Installation
not required
KSAJ25K160
∗ A minimum height of 16 3/4” from the ceiling is required to
install the canvas connection for the air inlet panel.
Table 2
Remote controller
Wired type
10
FOR THE FOLLOWING ITEMS, TAKE SPECIAL
CARE DURING CONSTRUCTION AND CHECK
AFTER INSTALLATION IS FINISHED.
BRC1C71
Items to be checked
If not properly done, what is
likely to occur
Are the indoor and outdoor
unit fixed firmly?
The units may drop, vibrate
or make noise.
Is the gas leak test finished?
It may result in insuffcient
cooling.
Is the unit fully insulated?
Condensate water may drip.
Does drainage flow
smoothly?
Condensate water may drip.
Does the power supply voltage correspond to that
shown on the name plate?
The unit may malfunction or
the components burn out.
Are wiring and piping correct?
The unit may malfunction or
the components burn out.
Is the unit safely grounded?
Dangerous at electric leakage.
Is wiring size according to
specifications?
The unit may malfunction or
the components burn out.
Is something blocking the air
outlet or inlet of either the
indoor or outdoor units?
It may result in insufficient
cooling.
Are refrigerant piping length
and additional refrigerant
charge noted down?
The refrigerant charge in the
system is not clear.
Check
b. Items to be checked at time of delivery
Also review the “SAFETY CONSIDERATIONS”
Items to be checked
Check
Did you explain about operations while showing the
operation manual to your customer?
Did you hand the operation manual over to your customer?
c. Points for explanation about operations
The items with
WARNING and
CAUTION marks in
the operation manual are the items pertaining to
possibillties for bodily injury and material damage in
addition to the general usage of the product. Accordingly, it
is necessary that you make a full explanation about the
described contents and also ask your customers to read the
operation manual.
2-3 NOTE TO THE INSTALLER
Be sure to instruct customers how to properly operate the
unit (especially cleaning filters, operating different functions,
and adjusting the temperature) by having them carry out
operations themselves while looking at the manual.
3.
SELECTING INSTALLATION SITE
Please attach additional thermal insulation material to the unit
body when it is believed that the relative humidity in the ceiling
exceeds 80%. Use glass wool, polyethylene foam, or similar
with a thickness of 3/8” or more as thermal insulation material.
(1) Select an installation site where the following conditions
are fulfilled and that meets with your customer’s approval.
• Where optimum air distribution can be ensured.
• Where nothing blocks air passage.
• Where condensate can be properly drained.
• In the upper space (including the back of the ceiling) of
the indoor unit where there is no possible dripping of
water from the refrigerant pipe, drain pipe, water pipe,
etc.
• If supporting structural members are not strong enough
to take the unit’s weight, the unit could fall out of place
and cause serious injury.
• Where the false ceiling is not noticeably on an incline.
• Where there is no risk of flammable gas leakage.
• Where sufficient clearance for maintenance and service
can be ensured.
• Where piping between indoor and outdoor units is possible within the allowable limit. (Refer to the installation
manual for the outdoor unit.)
NOTE
If installing the wireless kit in a room with electronic fluorescent lighting (inverter or rapid start type), the remote controller’s transmission distance may be shortened. Indoor
units should be installed as far away from fluorescent lighting as possible.
(2) Use suspension bolts for installation. Check whether
the ceiling is strong enough to support the weight of
the unit or not. If there is a risk, reinforce the ceiling
before installing the unit.
(Installation pitch is marked on the paper pattern for installation. Refer to it to check for points requiring reinforcing.)
4.
PREPARATIONS BEFORE INSTALLATION
(1) Relation of ceiling opening to unit and suspension bolt
position
NOTE
• Install the indoor and outdoor units, power supply wiring and
connecting wires at least 3.5 ft. away from televisions or
radios in order to prevent image interference or noise.
(Depending on the radio waves, a distance of 3.5 ft. may not
be sufficient enough to eliminate the noise.)
A (in.)
B (in.)
FXSQ12MVJU
Model
21 5/8
23 5/8
FXSQ18MVJU
27 9/16
29 1/2
FXSQ24MVJU
39 3/8
41 5/16
FXSQ30 · 36 · 48MVJU
55 1/16
57 1/16
• For standard installation (air inlet on the bottom side),
choose one of the below two means of installation.
Note: For other than standard installation, contact your
Daikin dealer for details.
For mounting air inlet panel with canvas connection
• Install this unit where the height of bottom panel is more
than 8.2 ft. so that the user cannot easily touch.
(length: in.)
Model
A (in.)
FXSQ12MVJU
24
FXSQ18MVJU
29 7/8
FXSQ24MVJU
41 11/16
11
FXSQ30 · 36 · 48MVJU
57 7/16
For mounting air inlet panel directly
Model
A (in.)
FXSQ12MVJU
24
FXSQ18MVJU
29 7/8
FXSQ24MVJU
41 11/16
FXSQ30 · 36 · 48MVJU
57 7/16
(2) The fan speed for this indoor unit is preset to provide
standard external static pressure.
• If higher or lower external static pressure is required,
reposition the adapter for the PC board. Refer to “9. WIRING EXAMPLE AND HOW TO SET THE REMOTE CONTROLLER”.
(3) Install the suspension bolts. (Use bolts of 3/8”
diameter.)
Use a hole-in-anchor, sunken insert, sunken anchor for
existing ceilings, and a sunken insert, sunken anchor or
other part to be procured in the field to reinforce the ceiling
to bearing the weight of the unit.
5.
INDOOR UNIT INSTALLATION
〈〈Installing optional accessories (except for the decoration
panel) before installing the indoor unit is easier.
As for the parts to be used for installation work, be sure to use
the provided accessories and specified parts designated by our
company.〉〉
(1) Install the indoor unit temporarily.
• Attach the hanger bracket
to the suspension bolt. Be
sure to fix it securely by
using a nut and washer
from the upper and lower
sides of the hanger
bracket.
12
(2) Check the unit is horizontally level.
NOTE
• The indoor unit is equipped with a built-in drain pump
and float switch. At each of the unit’s 4 corners, verify
that it is level by using a level or a water-filled vinyl tube.
(If the unit is inclined against condensate flow, the float
switch may malfunction and cause water to drip.)
6-2
Connecting the refrigerant piping
• When connecting the flare nut, coat the flare both inside and
outside with ester oil or ether oil and initially tighten by hand 3
or 4 turns before tightening firmly.
• To prevent flare nut cracking and gas leaks, be sure to use
both a spanner and torque wrench together, as shown in the
drawing below, when connecting or disconnecting pipes to/
from the unit.
(3) Tighten the upper nut.
(4) Fix the paper pattern for installation.
• The paper pattern for installation corresponds with the
measurements of the ceiling opening. Consult the builder
for details.
• Attach the paper pattern for installation to the unit with the
screws as shown in the drawing.
The paper pattern for installation is marked for 3 types of ceiling openings. Read the notations carefully when installing.
6.
6-1
REFRIGERANT PIPING WORK
GENERAL INSTRUCTIONS
• For refrigerant piping of outdoor units, see the installation manual attached to the outdoor unit.
• Before refrigerant piping work, check which type of refrigerant is used. Proper operation is not possible if the types of
refrigerant are not the same.
• The outdoor unit is charged with refrigerant.
NOTE
• Use a pipe cutter and flare suitable for the type of refrigerant.
• To prevent dust, moisuture or other foreign matter from infiltrating the tube, either pinch the end or cover it with tape.
• Do not allow anything other than the designated refrigerant
to get mixed into the refrigerant circuit, such as air, etc. If any
refrigerant gas leaks while working on the unit, ventilate the
room thoroughly right away.
• Refer to the Table 3 for the dimensions of flare nut spaces.
• Refer to the Table 3 to determine the proper tightening torque.
Table 3
Pipe
size
Tightening torque
(ft.lbf)
Flare
dimensions
A (in.)
φ 1/4”
10.4 – 12.7
0.342-0.358
φ 3/8”
24.1 – 29.4
0.504-0.520
φ 1/2”
36.5 – 44.5
0.638-0.654
φ 5/8”
45.6 – 55.6
0.760-0.776
Flare shape (in.)
NOTE
• Apply ester oil or ether oil around the flare portions before
connecting.
• The flare nuts used must be those included with the main
body.
• Over-tightening may damage the flare and cause a refrigerant leakage.
Not recommendable but in case of emergency
You must use a torque wrench but if you are obliged to
install the unit without a torque wrench, you may
follow the installation method mentioned below.
After the work is finished, make sure to check that
there is no gas leak.
When you keep on tightening the flare nut with a spanner,
there is a point where the tightening torque
suddenly increases. From that position, further tighten the
flare nut the angle shown below:
Table 4
Pipe size
Further tightening
angle
Recommended arm length of
tool (in.)
φ 1/4”
60 to 90 degrees
Approx. 5 7/8
φ 3/8”
60 to 90 degrees
Approx. 7 7/8
φ 1/2”
30 to 60 degrees
Approx. 9 13/16
φ 5/8”
30 to 60 degrees
Approx. 11 13/16
13
6-3
Piping insulation
• Execute heat insulation work completely on both sides of the
gas piping and the liquid piping. Otherwise, a water leakage
can result sometimes.
• When using a heat pump, the temperature of the gas piping
can reach up to approximately 250°F, so use insulation
which is sufficiently resistant.
• Also, in cases where the temperature and humidity of the refrigerant piping sections might exceed 86°F or RH80%, reinforce
the refrigerant insulation. (13/16” or thicker) Condensation may
form on the surface of the insulating material.
• Check the pipe connector for gas leaks, then insulate it as
shown in the drawing below.
• Make absolutely sure to execute heat insulation works on the
pipe-connecting section after checking gas leakage by thoroughly studying the following figure and using the attached
heat insulating materials for fitting. (Fasten both ends with
the clamps (accessory).)
• Wrap the sealing pad (accessory) only around the insulation
for the joints on the gas piping side.
NOTE
Do not use flux when brazing refrigerant piping. Therefore,
use the phosphor copper brazing filter metal (BCuP) which
does not require flux.
(Flux has extremely harmful infulence on refrigerant piping
sysems. For instance, if the chlorine based flux is used, it
will cause pipe corrosion or, in particular, if the flux contains
fluorine, it will damage the refrigerant oil.)
7.
DRAIN PIPING WORK
〈〈Rig the drain pipe as shown below and take measures
against condensation. Improperly rigged piping could lead
to leaks and eventually wet furniture and belongings.〉〉
(1) Carry out the drain piping
• The diameter of the drain pipe should be greater than or
equal to the diameter of the connecting pipe (vinyl tube;
pipe size: 13/16”; outer dimension: 1 1/4”).
• Keep the drain pipe short and sloping downwards at a gradient of at least 1/100 to prevent air pockets from forming.
• If the drain hose cannot be sufficiently set on a slope,
execute the drain raising piping.
• To keep the drain hose from sagging, space hanging
wires every 3.28 to 4.92 ft..
NOTE
Setting the unit at an angle opposite to the drain piping
might cause leaks.
CAUTION
Be sure to insulate any field piping all the way to the piping
connection inside the unit. Any exposed piping may cause
condensation or burns if touched.
6-4
Brazing referigerant piping
• Before brazing local refrigerant piping, nitrogen gas shall be
blown through the piping to expel air from the piping.
If your brazing is done without nitrogen gas blowing, a large
amount of oxide film develops inside the piping, and could
cause system malfunction.
• When brazing the refrigerant piping, only begin brazing after
having carried out nitrogen substitution or while inserting
nitrogen into the refrigerant piping. Once this is done, connect the indoor unit with a flared or a flanged connection.
• Nitrogen should be set to 2.9psi. with a pressure-reducing
valve if brazing while inserting nitrogen into the piping.
• Use the drain hose and the metal clamp. Tighten the
clamp firmly. Insert the drain hose into the drain socket,
up to the tape. Tighten the clamp until the screw head is
less than 3/16” from the hose.
• Wrap the sealing pad over the metal clamp and drain
hose to insulate.
• Insulate the drain hose inside the building.
〈 PRECAUTIONS FOR DRAIN RAISING PIPING 〉
〈 HOW TO INSTALL PIPING 〉
(1) Connect the drain hose to the drain raising pipes, and
insulate them.
(2) Connect the drain hose to the drain outlet on the indoor
unit, and tighten it with the metal clamp.
(3) Insulate both metal clamp and drain hose with the sealing pad.
14
[ WHEN ELECTRIC WIRING WORK IS NOT FINISHED
]
• Remove the electric parts box lid, connect a power supply
and remote controller to the terminals.
(Refer to the “HOW TO CONNECT WIRINGS”)
A (in.)
When canvas duct is installed
When air inlet panel is directly installed
13 3/4 – 20 7/8
10 13/16
• If converging multiple drain pipes, install according to the
procedure shown below.
Select converging drain pipes whose gauge is suitable for
the operating capacity of the unit.
NOTE
• Drain piping connections
Do not connect the drain piping directly to sewage pipes that
smell of ammonia. The ammonia in the sewage might enter
the indoor unit through the drain pipes and corrode the heat
exchanger.
• Keep in mind that it will become the cause of getting drain
pipe blocked if water collects on drain pipe.
(2) After piping work is finished, check drainage flows
smoothly.
3
• Open the water inlet lid, add approximately 61 in of water
gradually and check drainage flow.
Be sure attach the electric parts box lid before turning on the
power.
Next, press the inspection/test operation button “
” on the
remote controller. The unit will engage the test operation
mode. Press the operation mode selector button “
” until
selecting FAN OPERATION “
”. Then, press the ON/OFF
button “
”. The indoor unit fan and drain pump will start
up. Check that the water has drained from the unit. Press
“
” to go back to the first mode.
• You can check whether drainage is satisfactory or not by
removing the access opening lid and checking the water
level of the drain pan through the access opening.
• Be careful when doing so because the fan is turning at
the same time.
8.
ELECTRIC WIRING WORK
8-1 GENERAL INSTRUCTIONS
• All field supplied parts and materials, electric works must
conform to local codes.
• Use copper wire only.
• Follow the “WIRING DIAGRAM” attached to the unitbody to
wire the outdoor unit, indoor units and the remote controller.
For details on hooking up the remote controller, refer to the
“INSTALLATION MANUAL OF REMOTE CONTROLLER.”
• All wiring must be performed by an authorized electrician.
• This system consists of multiple indoor units. Mark each
indoor unit as unit A, unit B . . . , and be sure the terminal board
wiring to the outdoor unit and BS unit are properly matched. If
wiring and piping between the outdoor unit and an indoor unit
are mismatched, the system may cause a malfunction.
• A circuit breaker capable of shutting down the power supply
to the entire system must be installed.
8-2 ELECTRICAL CHARACTERISTICS
Power
supply
Units
[ WHEN ELECTRIC WIRING WORK IS FINISHED ]
• Check drainage flow during COOL running, explained under
“TEST OPERATION.”
Model
Hz
Volts
Voltage
range
FXSQ12MVJU
FXSQ18MVJU
FXSQ24MVJU
FXSQ30MVJU
FXSQ36MVJU
FXSQ48MVJU
60
208230
Max.
253
Min.
187
Fan motor
MCA
MFA
W
FLA
0.7
15
50
0.6
1.0
15
85
0.8
1.4
15
125
1.1
1.8
15
225
1.4
1.8
15
225
1.5
2.4
15
225
2.0
MCA:Min. Circuit Amps (A); MFA:Max. Fuse Amps (A)
15
kW: Fan Motor Rated Output (W); FLA:Full Load Amps (A)
8-3 SPECIFICATIONS FOR FIELD SUPPLIED
FUSES AND WIRE
Power supply wiring
Model
Field
fuses
Remote controller wiring
Transmission wiring
Size
Wire
Size
Wire size
must
comply
with local
codes.
Sheathed
wire
(2 wire)
AWG
18-16
FXSQ12MVJU
FXSQ18MVJU
FXSQ24MVJU
FXSQ30MVJU
15A
FXSQ36MVJU
FXSQ48MVJU
NOTE
1. Allowable length of transmission wiring between indoor/
outdoor units and between the indoor unit and the remote
controller is as follows.
(1) Outdoor unit – Indoor unit:
Max. 3280 ft. (Total wiring length: 6560 ft.)
(2) Indoor unit – Remote controller:
Max. 1640 ft.
2. Insulated thickness:
16
1/16” or more
9.
WIRING EXAMPLE AND HOW TO SET
THE REMOTE CONTROLLER
9-1 HOW TO CONNECT WIRINGS
• Lower the electric parts box, as shown in the drawing, to
make connections.
NOTE
• After wiring, adhere the sealing material (1 3/8” × 5 7/8”)
around the wires as shown below.
[Be sure to adhere it to avoid water from outside unit.]
NOTE
1. Use round crimp-style terminals for connecting wires to the
power supply terminal block.
If unavailable, observe the following points when wiring.
• Do not connect wires of different gauge to the same
power supply terminal.
(Looseness in the connection may cause overheating.)
• Use the specified electric wire. Connect the wire securely
to the terminal. Lock the wire down without applying
excessive force to the terminal. (Tightening torque:
0.97ft.lbf ±10 %)
2. Tightening torque for the terminal screws.
• Use the correct screwdriver for tightening the terminal
screws. If the blade of screwdriver is too small, the head
of the screw might be damaged, and the screw will not be
properly tightened.
• If the terminal screws are tightened too hard, screws
might be damaged.
• Refer to the table below for the tightening torque of the
terminal screws.
Terminal
Size
Tightening torque
(ft.lbf)
Terminal block for remote controller (6P)
M3.5
0.58 – 0.72
Power supply terminal block
M4
0.87 – 1.06
Ground terminal
M4
1.06 – 1.43
3. Do not connect wires of different gauge to the same
grounding terminal. Looseness in the connection may deteriorate protection.
4. Outside of the unit, keep transmission wiring at least
1 15/16” away from power supply wiring. The equipment
may malfunction if subjected to electrical (external) noise.
CAUTION
• Be sure to attach the sealing material or putty (field supplied)
to hole of wiring to prevent the infiltration of water as well as
any insects and other small creatures from outside. Otherwise a short-circuit may occur inside the electric parts box.
• When clamping the wires, be sure no pressure is applied to
the wire connections by using the included clamping material
to make appropriate clamps. Also, when wiring, make sure
the lid on the electric parts box fits snugly by arranging the
wires neatly and attaching the electric parts box lid firmly.
When attaching the electric parts box lid, make sure no wires
get caught in the edges. Pass wiring through the wiring
through holes to prevent damage to them.
• Make sure the remote controller wiring, the wiring between
the units, and other electrical wiring do not pass through the
same locations outside of the unit, separating them by at
least 1 15/16”, otherwise electrical noise (external static)
could cause mistaken operation or breakage.
5. For remote controller wiring, refer to the “INSTALLATION
MANUAL OF REMOTE CONTROLLER” attached to the
remote controller.
6. Never connect power supply wiring to the terminal
block for remote controller wiring. A mistake of the sort
could damage the entire system.
7. Use only specified wire and tightly connect wires to terminals. Be careful wires do not place external stress on terminals. Keep wiring in neat order and so as not to obstruct
other equipment such as popping open the electric parts
box lid. Make sure the lid closes tight. Incomplete connections could result in overheating, and in worse case, electric
shock or fire.
17
9-2 SETTING OF STATIC PRESSURE
CHANGEOVER CONNECTOR
• According to the system static pressure requirement, reposition the adaptors of PC board inside the electric parts box as
shown in the below drawings.
NOTE
• The unit is factory set for standard static pressure (X4A) at
the time of shipping.
18
COMMON ITEM
9-3 WIRING EXAMPLE
• Fit the power supply wiring of each unit with a switch and
fuse as shown in the drawing.
COMPLETE SYSTEM EXAMPLE
NOTE
1. A single switch can be used to supply power to units on the
same system. However, branch switches and branch circuit
breakers must be selected carefully.
2. Do not ground the equipment on gas pipes, water pipes or
lightning rods, or crossground with telephones. Improper
grounding could result in electric shock.
9-4 CONTROL BY 2 REMOTE CONTROLLERS (Controlling 1 indoor unit by 2 remote controllers)
• When using 2 remote controllers, one must be set to “MAIN”
and the other to “SUB”.
MAIN/SUB CHANGEOVER
(1) Insert a screw driver into the recess between the upper
and lower part of remote controller and, working from the 2
positions, pry off the upper part.
The remote controller PC board is attached to the upper
part of remote controller.
1. When using 1 remote controller for 1 indoor unit. (Normal operation)
(2) Turn the MAIN/SUB changeover switch on one of the two
remote controller PC boards to “S”.
(Leave the switch of the other remote controller set to “M”.)
Wiring Method (See ‘‘ELECTRIC WIRING WORK’’)
2. For group control or use with 2 remote controllers
(3) Remove the electric parts box lid
(4) Add remote control 2 (slave) to the terminal block for
remote controller (P1, P2) in the electric parts box.
(There is no polarity.) (Refer to Fig. 3 and 8-3.)
19
9-5 COMPUTERISED CONTROL (FORCED OFF
AND ON/OFF OPERATION)
(1) Wire specifications and how to perform wiring
• Connect the input from outside to terminals T1 and T2 of
the terminal block for remote controller.
11. TEST OPERATION
Refer to the installation manual of the outdoor unit.
• The operation lamp of the remote controller will flash when
an malfunction occurs. Check the malfunction code on the
liquid crystal display to identify the point of trouble. An explanation of malfunction codes and the corresponding trouble is
provided in “CAUTION FOR SERVICING” of the outdoor
unit.
If any of the items in Table 4 are displayed, there may be a
problem with the wiring or power, so check the wiring again.
Table 2
Remote control display
Wire specification
Sheathed vinyl cord or cable (2 wire)
Gauge
AWG 18-16
Length
Max. 328ft.
External terminal
Contact that can ensure the minimum applicable load of 15 V DC, 10 mA.
(2) Actuation
• The following table explains FORCED OFF and ON/OFF
OPERATIONS in response to Input A.
FORCED OFF
ON/OFF OPERATION
Input “ON” stops operation (impossible by
remote controllers.)
Input OFF → ON turns
ON unit.
Input OFF enables control by remote controller.
Input ON → OFF turns
OFF unit.
(3) How to select FORCED OFF and ON/OFF OPERATION
• Turn the power on and then use the remote controller to
select operation.
9-6 CENTRALIZED CONTROL
• For centralized control, it is necessary to designate the group
No. For details, refer to the manual of each optional controllers for centralized control.
10. FIELD SETTING
Make sure the terminal box lids are closed on the indoor
and outdoor units.
Field setting must be made from the remote controller in
accordance with the installation condition.
• Setting can be made by changing the “Mode No.”, “FIRST
CODE NO.”, and “SECOND CODE NO.”.
• For setting and operation, refer to the “FIELD SETTING” in
the installation manual of the remote controller.
• Set the remote controller to the field set mode. For
details, refer to the “HOW TO SET IN THE FIELD”, in the
remote controller manual.
• When in the field set mode, select mode No. 12, then set
the first code (switch) No. to “1”. Then set second code
(position) No. to “01” for FORCED OFF and “02” for ON/
OFF OPERATION. (FORCED OFF at factory set)
20
Content
“Concentrated Management” • There is a short circuit at the
FORCED OFF terminals (T1, T2)
is lit up
“U3” is lit up
• The check operation has not performed on outdoor unit P.C.B.
“U4” is lit up
“UH” is lit up
• The power on the outdoor unit is
off.
• The outdoor unit has not been
wired for power supply.
• Incorrect wiring for the transmission wiring and / or FORCED
OFF wiring.
No display
• The power on the indoor unit is
off.
• The indoor unit has not been
wired for power supply.
• Incorrect wiring for the remote
controller wiring, the transmission
wiring and / or the FORCED OFF
wiring.
Daikin US Corporation
375 Park Avenue, Suite 3308
New York, NY 10152
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www.daikinac.com
info@daikinac.com
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3P086156-9N EM03A042B
(0403) HT