Fluo FMV-ND224PH/A-T User manual

Multi Variable Air Conditioners
Duct Type Indoor Unit
Models:
FMV-ND224PH/A-T
FMV-ND280PH/A-T
Air Conditioners
Owner's Manual
Thank you for choosing Air Conditioners, please read this owner’s manual carefully before
operation and retain it for future reference.

Preface
For correct installation and operation, please read all instructions carefully. Before reading the
instructions, please be aware of the following items:
(1) For the safe operation of this unit, please read and follow the instructions carefully.
(2) During operation, total capacity of indoor units should not exceed the total capacity of outdoor
units. otherwise, poor effect of cooling or heating may result.
(3) Direct operators or maintainers should well keep this manual.
(4) If this unit fails to operate normally, please contact vour service center as soon as possible
and provide the following information:
●Content on the nameplate(model number,cooling capacity,production code,ex-factory date.
●Malfunction details(before and after the malfunction occurs.
(5) Each unit has been strictly tested and proved to be qualified before ex-factory. In order to
prevent units from being damaged or operating normally because of improper disassembly,
please do not disassemble the unit by yourself. If you need to disassemble and check units,
please contact our service center. We will send specialists to guide the disassembly.
(6) All graphics in this manual is only for your reference. For sales or production reasons,these
graphics are subject to change by manufacturer without prior notice.
User Notice
●This appliance can be used by children aged from 8 years and above and persons with
reduced physical, sensory or mental capabilities or lack of experience and knowledge if they
have been given supervision or instruction concerning use of the appliance in a safe way and
understand the hazards involved. Children shall not play with the appliance. Cleaning and
user maintenance shall not be made by children without supervision.
●DISPOSAL: Do not dispose this product as unsorted municipal waste. Collection of such
waste separately for special treatment is necessary.
Correct Disposal of this product
This marking indicates that this product should not be disposed with
other household wastes throughout the EU. To prevent possible
harm to the environment or human health from uncontrolled waste
disposal, recycle it responsibly to promote the sustainable reuse of
material resources. To return your used device, please use the return
and collection systems or contact the retailer where the product
was purchased. They can take this product for environmental safe
recycling.

Contents
1 Safety Precautions .............................................................................................................. 1
2 Product Introduction ............................................................................................................. 3
2.1 Names of Key Components........................................................................................................3
2.2 Rated Working Condition............................................................................................................3
2.3 Unit Functions.............................................................................................................................3
3 Preparations for Installation.................................................................................................. 4
3.1 Standard Fittings.........................................................................................................................4
3.2 Location for Installation...............................................................................................................5
3.3 Requirements for Communication Line ......................................................................................5
3.4 Wiring Requirements ..................................................................................................................6
4 Installation Instructions......................................................................................................... 7
4.1 Installation of Indoor Unit ............................................................................................................7
4.2 Refrigerant Pipe Connection.......................................................................................................9
4.3 Drainage Pipe Installation and Drainage System Testing........................................................... 9
4.4 Installation of Air Duct ............................................................................................................... 11
4.5 Installation of Wired Controller..................................................................................................13
4.6 External Static Pressure Settings .............................................................................................13
5 Wiring Work........................................................................................................................ 14
5.1 Connection of Wire and Patch Board Terminal .........................................................................14
5.2 Power Cord Connection............................................................................................................15
5.3 Connection of Communication Wire between Indoor Unit and Outdoor Unit(or indoor unit) ....15
5.4 Connect Communication Wire of Wired Controller ...................................................................15
5.5 Illuminate for Connection of Wired Controller and Indoor Units Network ................................16
6 Routine Maintenance.......................................................................................................... 18
6.1 Cleaning of Filter.......................................................................................................................18
6.2 Maintenance before the Seasonal Use.....................................................................................18
6.3 Maintenance after the Seasonal Use........................................................................................18
7 Table of Error Codes for Indoor Unit................................................................................... 19
8 Troubleshooting .................................................................................................................. 19

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1 Safety Precautions
means items that must be forbidden! Otherwise, it may lead to personal injury or death or
serious damage.
means items that must be followed! Otherwise, it may lead to personal injury or property
loss.
Exclusive
accessory
exclusive
Follow this instruction to complete
the installation work. Please
carefully read this manual before
unit startup and service.
Please rstly connect the wired
controller before energization,
otherwise wired controller can
not be used.
Wire size of power cord should
be large enough.The damaged
power cord and connection wire
should be replaced by exclusive
cable.
Never fail to comply with the
nitrigen charge requirements.
Charge nitrogen when welding
pipes.
Before installation, please check if
the power supply is in accordance
with the requirements specied on
the nameplate. And also take care
of the power safety.
Installation should be conducted
by dealer or qualied personnel.
Please do not attempt to install the
unit by yourself. Improper handling
may result in water leakage,
electric shock or re disaster etc.
Be sure to use the exclusive
accessory and part to prevent the
water leakage, electric shock and
re accidents.
Before using the unit, please check
if the piping and wiring are correct
to avoid water leakage, refrigerant
leakage, electric shock, or re etc.
If refrigerant leakage happens
during installation, please ventilate
immediately. Poisonous gas will
emerge if the refrigerant gas meets
re.
After connecting the power cord,
please x the electric box cover
properly in order to avoid accident.
Never short-circiut or cancel the
pressure switch to prevent unit
damage.
Make sure the unit can be earthed
properly and soundly after
plugging into the socket so as to
avoid electric shock. Please do
not connect the ground wire to gas
pipe, water pipe, lightning rod or
telephone line.
N 2

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If anything abnormal happens
(such as burning smell), please
power off the unit and cut off
the main power supply, and
then immerdiately contact FLUO
appointed service center.If
abnormality keeps going, the unit
might be damaged and lead to
electric shock or re.
User is not allowed to repair the
unit. Fault service may cause
electric shock or re accidents.
Please contact FLUO appointed
service center for help.
Do not insert fingers or objects
into air outlet/inlet grille.
Never start up or shut off the air
conditioner by means of directly
plug or unplug the power cord.
Do not allow children
operate this unit.
Turn off the unit or cut off the
power supply before cleaning the
unit, otherwise electric shock or
injury may happen.
Do not expose the unit
to the moist or corrosive
circumstances.
Volatile liquid, such as diluent
or gas will damage the unit
appearance.Only use soft cloth
with a little neutral detergent to
clean the outer casing of unit.
Open the door and window and
keep good ventilation in the room
to avoid oxygen decit when
the gas/oil supplied heating
equipment is used.
Turn off the unit after it runs at
least ve minutes; otherwise it
will inuence oil return of the
compressor.
Do not operate this unit
with wet hands.
Never spray or ush water
towards unit, otherwise
malfunction or electric shock
may happen.
Electrify the unit 8 hours before
operation. Please switch on for
8 hours before operation. Do not
cut off the power when 24 hours
short-time halting (to protect the
compressor).
Under cooling mode, please
don't set the room temperature
too low and keep the
temperature difference between
indoor and outdoor unit within
5.
＜5Min
24H
26 C
30 C

Multi Variable Air Conditioners Duct Type Indoor Unit
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Any personal injury or property loss caused by improper installation, improper debug,
unnecessary repair or not following the instructions of this manual should not be the responsibility of
FLUO.
2 Product Introduction
2.1 Names of Key Components
No. ①②③④⑤
Name Filter Air Inlet Air Outlet Fittings Drain Pipe
2.2 Rated Working Condition
Indoor Side Condition Outdoor Side Condition
Dry Bulb Temp °C Wet Bulb Temp °C Dry Bulb Temp °C Wet Bulb Temp °C
Rated Cooling 27 19 35 24
Rated Heating 20 15 7 6
Indoor Unit Working Temperature Range:16°C~ 32°C.
2.3 Unit Functions
Unit Functions Wired Controller
XK46(Standard)
Wired Controller
XK49(Optional)
Remote Controller
YAD1F(Optional)
Remote Controller
YV1L1(Optional)
Operation Mode (Cooling,
Heating, Fan, Dehumidifying)
Fan Speed Adjustment
Temperature Adjustment
X-fan Function
Quiet Function
Sleep Function
Save Function
E-heater Function
Memory Function
Absence Function
Timer Function
Low Temp Dehumidify Function
Filter Cleaning Reminding
Function
I Feel
Light Function
Swing

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Notes:
① √: included, X: not included
② Please refer to the user manual of Wired Controller or Remote Controller for function details.
3 Preparations for Installation
Note: Product graphics are only for reference. Please refer to actual products. Unspecified
measure unit is mm.
3.1 Standard Fittings
Please use the supplied standard ttings listed below as instructed.
No. Name Appearance Q'ty Usage
1 Wired Controller 1 To control the indoor unit
2
M4X25 Screw
(Cross recessed small
pan head screw)
2To x the wired controller
3 Special Nut 1 To be used for connecting the
refrigerant pipe
4M10 Nut (Nut with
Washer M10X8) 4To be used together with the hanger bolt for installing the unit.
5 M10 Nut (M10X8.4) 8 To be used together with the hanger
bolt for installing the unit.
6M10 Washer (Spring
Washer M10X2.6) 4To be used together with the hanger bolt for installing the unit.
7M10 Washer (M10Xφ30X
2.5) 4To be used together with the hanger bolt for installing the unit.
8 Insulation 1 To insulate the gas pipe
9 Insulation 1 To insulate the liquid pipe
10 Fastener 8 To fasten the sponge
11 Hanger 4 To x the indoor unit
12 M8 Nut (M8X6.8) 8 To fix the hook on the cabinet of the
unit.
13 M8 Washer (Spring
Washer M8X2.1) 8To fix the hook on the cabinet of the unit.
14 M8 Washer (M8Xφ16X
1.5) 8To fix the hook on the cabinet of the unit.

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3.2 Location for Installation
(1) The appliance shall not be installed in the laundry.
(2) The top holder must be strong enough to support unit’s weight.
(3) Drain pipe can drain water out easily.
(4) There is no obstacle at inlet or outlet. Please ensure good air circulation.
(5) In order to make sure the space for maintenance, please install the indoor unit according to
the dimension described below.
(6) Keep the unit away from heating source, inammable gas or smoke.
(7) This is a concealed ceiling type unit.
(8) Indoor unit, outdoor unit, power cord and electric wire should stay at least 1m from the TV set
and radio. Otherwise, these electrical appliances may have image interference and noise.
(Even if the distance is 1m, when there is strong electric wave, noise may still occur.)
Unit: mm
＞560mm
＞1000mm
Nut with
Washer
Nut Spring
Washer
＞2500mm
Fig 3.2
Notes:
① Installation of the unit must be in accordance with National Electric Codes and local
regulations.
② Improper installation will affect unit’s performance, so do not install the unit by yourself.
Please contact local dealer to arrange professional technicians for the installation.
③ Do not connect power until all installation work is nished.
3.3 Requirements for Communication Line
Notes:
If the unit is installed in the place with strong electromagnetic interference, shielded wire must
be applied on the communication wire between indoor unit and wired controller. Twisted pair line
with shielding function must be applied on the communication wire between indoor unit and indoor
unit(outdoor unit).
3.3.1 Select communication line for indoor unit and wired controller
L=L01+L02+L1+L2+......+L(n-1)(n≤16)
L1
L01L02
Sub-master
Controller
Master
Controller
Indoor Unit 1 Indoor Unit 2 Indoor Unit 3 Indoor Unit n
L2 L(n-1)
Fig 3.3.1

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Wire Type Total Length of
Communication Line L(m) Wire Gauge (mm2)Wire Standard Remark
Light/Common PVC
Jacket Soft Wire L≤250 2×0.75~2×1.25 IEC 60227-5
1.The total length of com
-munication line should
not exceed 250m
2.The cord shall be Circu
-lar cord (the cores shall
be twisted together).
3.If unit is installed in plac
-es with intense magnetic
field or strong interferenc
-e interference, it is neces
-sary to use shielded wire.
3.3.2 Select communication line for indoor unit and outdoor unit
Outdoor
unit1
Outdoor
unit 2
Outdoor
unit 3
Outdoor
unit 4
Indoor Unit 1 Indoor Unit 2 Indoor Unit n
LO1
L=LO1+LO2+LO3+Li1+Li2+.......+Lin(n≤80)
LO2 LO3 Lin
Fig 3.3.2
Wire Type
Total Length of
Communication
Line L(m)
Wire Gauge (mm2)Wire
Standard Remark
Light/Common PVC
Jacket Soft Wire L≤1000 ≥2×0.75 IEC 60227-5
1. If the wire diameter is enlarged
to 2 × 1 mm2, the total communic
-ation line length can reach 1500
m.
2. The cord shall be Circular
cord (the cores shall be twisted
together).
3.If unit is installed in places with
intense magnetic field or strong
interference, it is necessary to use
shielded wire.
3.4 Wiring Requirements
(1) Power Cord Size and Air Switch Capacity
Model Power Cord Size Air Switch apacity
(A)
Minimum
Sectional Area of
Ground Wire
Minimum
Sectional Area of
Power Cord(mm2)
FMV-ND224PH/A-T 220~240V-1ph-50Hz
208~230V-1ph-60Hz
10 1.0 1.0
FMV-ND280PH/A-T 16 1.5 1.5
Notes:
① Use copper wire only as unit’s power cord. Operating temperature should be within its rated
value.
② If the power cord is more than 15m long, please increase properly the sectional area of power
cord to avoid overload, which may cause accident.
③ Above selection requirements: Power cord size is based on BV single-core wire (2~4pc) at
40°Cambient temperature when laying across plastic pipe. Air switch is D type and used at 40°C.

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If actual installation condition varies, please lower the capacity appropriately according to the
specications of power cord and air switch provided by manufacturer.
(2) Install cut-off device near the unit. The minimum distance between each stage of cut-off
device should be 3mm(The same for both indoor unit and outdoor unit).
4 Installation Instructions
4.1 Installation of Indoor Unit
4.1.1 Outline Dimension and Installation Spots
Equip with a inspection hatch after lifting the unit. For the convenience of maintenance, the
service port should be on one side of the electric box and below unit’s lower level.
(1) Below are the outline dimension applicable to indoor units
C
A
D
B
E
F
Air Reture
Fig 4.1.1
Below are dimensions of A, B, C, etc. for different models:
Unit: mm
Model A B C D E F
FMV-ND224PH/A-T 1353 632 992 1150 192 327
FMV-ND280PH/A-T 1563 706 992 1350 192 402
(2) Drill bolt holes and install bolts
1) Stick the reference cardboard on the installation position; drill 4 holes according to the hole
site on the cardboard as shown in fig 4.1.2; diameter of drilling hole is according to the
diameter of expansion bolt and the depth is 60-70mm, as shown in g 4.1.3.

Multi Variable Air Conditioners Duct Type Indoor Unit
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Paper pattern
Hole diameterDrill hole according
to the hole site
60～70mm
Fig 4.1.2 Fig 4.1.3
2) Insert the M10 expansion bolt into the hole and then knock the nail into the bolt, as shown in
g 4.1.4.
Notes:
The length of bolt depends on the installation height of the unit, bolts are eld supplied.
Expansion bolt
Fig 4.1.4
(3) Install the indoor unit temporarily
Assemble suspension bolt on the expansion bolt, attach the hanger bracket to the suspension
bolt. Be sure to x it securely by using a nut and washer from upper and lower sides of the hanger
bracket. The washer xing plate will prevent the washer from falling.
(4) The usage of paper pattern
Refer to paper pattern of installation for ceiling opening dimension. The center of ceiling opening
is indicated on the paper pattern. Fix the paper pattern to the unit with 4 screws and x the corners of
the waterspout at the drainage pipe by screws.
(5) Adjust the unit to the right position.
(6) Check the level of the unit
The indoor unit is equipped with build-in water pump and oat switch, verify the levelness of 4
directions by level gauge or vinyl tube (lled with water) respectively.
Level
Fig 4.1.5
(7) Remove the washer locating plate and then tighten the nut on it.
(8) Remove the paper pattern.

Multi Variable Air Conditioners Duct Type Indoor Unit
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＞1000mm ＞560mm
Air Reture
Air Supply
Installation of suspender
Suspender
Hook
Flat washer
Spring washer
Nut
Fig 4.1.6
4.2 Refrigerant Pipe Connection
(1) Aim the aring port of copper pipe at the center of screwed joint and then tighten the aring
nut with hand as shown in g 4.2.
(2) Tighten the aring nut with torque wrench.
pipe joint of indoor unit
wrench torque wrench
flaring nut pipe joint
Fig.4.2
(3) Use pipe bend when bending the pipe and the bending angle should not be too small.
(4) Wrap the connection pipe and joint with sponge and then tie them rmly with tape.
4.3 Drainage Pipe Installation and Drainage System Testing
4.3.1 Notice for Installation of Drain Pipe
(1) The drainage pipe should be short and the gradient downwards should be at least 1%~2% in
order to drain condensation water smoothly.
(2) The diameter of drainage hose should be bigger or equal to the diameter of drainage pipe
joint.
(3) Install drainage pipe according to the following g and arrange insulation to the drainage pipe.
Improper installation may lead to water leakage and damp the furniture and other things in the
room.
(4) You can buy normal hard PVC pipe used as the drainage pipe. During connection, insert the
end of PVC pipe into the drainage hole and then tighten it with drainage hole and wire binder.
Can’t connect the drainage hole and drainage hole with glue.
(5) When the drainage pipelines are used for several units, the position of pipeline should be

Multi Variable Air Conditioners Duct Type Indoor Unit
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about 100mm lower than the drainage port of each unit. In this case, thicker pipes should be
applied.
additional drainage pipe
insulating
pipe insulating tape
drainage pipe
of indoor unit
Fig 4.3.1
4.3.2 Drainage pipe installation
1) Insert the drain hose into the drain hole and tighten it with tapes, as shown in Fig 4.3.2.
2) Tighten the pipe clamp, with the distance between screw nut and hose smaller than 4mm.
① metal clamp(accessory)
② drain hose(accessory)
3) Use sealing plate to make the pipe clamp and hose insulated, as shown in Fig.4.3.3.
① metal clamp(accessory)
② hermal sponge(accessory)
1 2
3
1
2
Fig 4.3.2 Fig 4.3.3
4) When connecting several drain pipes, follow the instruction as indicated in Fig 4.3.4. Choose
the drain collecting pipe that matches with unit capacity.
T Joint of Collecting Pipe
100 m
Fig 4.3.4
5) Install the trap as shown in following Fig 4.3.5.
6) Install one trap for each unit.
7) Convenience for cleaning trap in the future should be considered when installing it.
Fig 4.3.5

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8) The horizontal pipe can be connected to vertical pipe in the same level; please select the
connection way as shown in following g.
NO1: Connection of drainage pipe joints (Fig4.36)
NO2: Connection of downspout elbow (Fig4.3.7)
NO3: Inserting pipe connection (Fig4.3.8)
Connection of
drainage pipe joints
Connection of
downspout elbow
Inserting pipe connection
Fig 4.3.6 Fig 4.3.7 Fig 4.3.8
9) Drain pipes should have a downward slope of at least 1%~2%, in order to prevent pipes from
sagging, install hanger bracket at intervals of 1000~1500mm.
1000-1500mm
Fig 4.3.9
4.3.3 Test of Drainage System
(1) Please test drainage system after electric work is finished.Inject approximately 1L purified
water to drain pan from air vent, ensure that not to splash the water over the electrical
components (e.g. water pump. etc).
(2) During the test, please carefully check the drainage joint, make sure no any leakage occur.
(3) It’s strongly recommend to do the drain test before ceiling decoration.
Inject water
Fig 4.3.9
4.4 Installation of Air Duct
Notes:
① There should be insulating layer on air-out duct, air-return duct and fresh air duct to avoid
heat loss and moisture. Adhere a nail on the air duct and then add thermal sponge with a layer of tin.

Multi Variable Air Conditioners Duct Type Indoor Unit
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Fasten it with a nail cover and then seal the junction with tin tapes; You can also use other materials
that have good insulation quality.
② Each air-out duct and air-return duct should be xed on a pre-made board with iron frame.
The junction of air duct should be well-sealed in order to prevent air leakage.
③ The design and construction of air duct should comply with national requirements.
④ The edge of air-return duct is suggested to be more than 150mm away from the wall. Add a
lter to the air-return opening.
⑤ Please consider noise-damping and vibration damping for the design and construction of
air duct. Besides, noise source must be away from people. For instance, do not have the air-return
opening installed on top of the user(ofces, rest area, etc.).
4.4.1 Installation of Air-out Duct
(1) Installation of the Rectangular Duct
4 73 65
1
2
3
Return air Supply air
Fig 4.4.1
No. Name No. Name
1 Hanger Rod 5 Static Pressure Box
2Return Air Duct 6 Main Supply Air Duct
3 Canvas Duct 7 Supply Air Outlet
4Return Air Inlet
4.4.2 Shape and Size of Air Outlet and Air-return Opening
B
21
A
Fig 4.4.2 Air Outlet

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Fig 4.4.3 Air-return Opening
Model Size of Air Outlet Size of Air –returen Opening
A B C D
FMV-ND224PH/A-T 192 992 1150 327
FMV-ND280PH/A-T 192 992 1350 402
4.5 Installation of Wired Controller
Please refer to User Manual of Wired Controller for the installation details.
Note: When installation is finished, the unit must be tested and debugged before operation.
Please refer to Instruction Manual of ODU for auto addressing and debugging details.
4.6 External Static Pressure Settings
Unit parameters can be set in unit On or Off status.
(1) Long press FUNCTION button for 5s and the temperature zone displays “C00”; long press
FUNCTION button for another 5s to enter the interface of setting wired controller parameters. “P00” is
displayed in temperature zone;
(2) Press “▲” or “▼” button to select parameter code. Press MODE button to enter parameter
setting. At that time, parameter value is blinking. Press “▲” or “▼” button to adjust the parameter
value and press ENTER/CANCEL button to nish setting.
(3) Press ENTER/CANCEL button to return to last step until exists setting parameters.
The parameter setting list is as following:
Parameter code Parameter name Parameter range Default value Note
P30
Set static
pressure of
indoor fan motor
01-09: static
pressure level of
indoor fan motor
05
There are two kinds of static
pressure level:
5 levels: 03, 04, 05, 06, 07
9 levels: 01, 02, 03, 04, 05, 06, 07,
08, 09
Static pressure level range is
different for different models; the
wired controller will automatically
select static pressure level range of
indoor fan motor according to the
model of indoor unit.
Notes:
① Under parameter setting status, FAN, TIMER, SLEEP and SWING button are invalid. Press
ON/OFF button to go back to home page, but not turning on/off the unit.
② Under parameter setting status, the signal from remote controller is invalid.The parameter of
External Static Pressure list is as following:
External Static Pressure static pressure level of indoor fan motor
0.28 inWG(70 Pa) 01
0.36 inWG(90 Pa) 02
0.44 inWG(110 Pa) 03
0.52 inWG(130 Pa) 04
0.60 inWG(150 Pa) 05
0.64 inWG(160 Pa) 06
0.68 inWG(170 Pa) 07

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0.72 inWG(180 Pa) 08
0.80 inWG(200 Pa) 09
Notes:
① Keep in mind that a shortage of airow quantity or water leakage will result because the air
conditioner will be operated outside the rated range of airow quantity if the external static pressure is
wrongly set.
② The Sound Pressure Level will change if the external static pressure is wrongly set.
5 Wiring Work
Warning!
Before obtaining access to terminals, all supply circuits must be disconnected.
Notes:
① Units must be earthed securely, or it may cause electric shock.
② Please carefully read the wiring diagram before carry out the wiring work, incorrect wiring
could cause malfunction or even damage the unit.
③ The unit should be powered by independent circuit and specic socket.
④ The wiring should be in accordance with related regulations in order to ensure the units
reliable running.
⑤ Install circuit breaker for branch circuit according to related regulations and electrical
standards.
⑥ Keep cable away from refrigerant pipings, compressor and fan motor.
⑦ The communication wires should be separated from power cord and connection wire between
indoor unit and outdoor unit.
⑧ Adjust the static pressure via wired controller according to site circumstance.
5.1 Connection of Wire and Patch Board Terminal
(1) The connection of wire (as shown in g 5.1.1)
1) Strip about 25mm insulation of the wire end by stripping and cutting tool.
2) Remove the wiring screws on the terminal board.
3) Shape the tail of wire into ring by needle nose plier, and keep the gauge of ring in accordance
with screw.
4) Use the screwdriver for tightening the terminal.
(2) The connection of stranded wire (as shown in g 5.1.2)
1) Strip about 10mm insulation of the end of stranded wire by stripping and cutting tool.
2) Loosen the wiring screws on terminal board.
3) Insert the wire into the ring tongue terminal and tighten by crimping tool.
4) Use the screwdriver for tightening the terminal.
single branch wire
insulation layer insulation layer
multiple twisted wires
wiring terminal
Fig 5.1.1 Fig 5.1.2

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5.2 Power Cord Connection
Notes:
All indoor units must be unied of power supply so that they can be powered ON/OFF at the
same time.
power supply
Outdoor unit
Indoor
unit 1 Indoor unit 2 Indoor unit n
connection
wire (match
with resistance)
Wired Controller Wired Controller Wired Controller
Note: indoor unit quantity n is according to the outdoor unit capacity.
Wiring board of power XT1
Wiring board of
communication XT2
Wiring board of power XT1
Wiring board of
communication XT2
Wiring board of power XT1
Wiring board of
communication XT2
QF
QF
PE
QF
PE
QF
PE
Fig 5.2
For units with single-phase power supply.
(1) Detach the electric box lid.
(2) Let the power cord pass through the wiring through-holes.
(3) Connect the power cord to terminal "L, N, ".
(4) Fix the power card with wiring clamp.
5.3 Connection of Communication Wire between Indoor Unit and Outdoor
Unit(or indoor unit)
(1) Detach the electric box lid.
(2) Let the Communication cable pass through the wiring through-holes.
(3) Connect the communication wire to terminal D1 and D2 of indoor 4-bit wiring board, as shown
in g5.3.1.
wiring screw terminal board
1
D1
D1 D2 H1 H2
D2 H1 H2
IDU PCB
indoor unit
previous IDU match resistance
for communication
communication
interface CN12
Fig 5.3.1 Fig 5.3.2
(4) Fix the communication cable with clamp of electric box.
(5) For more reliable communication, make sure connect the terminal resistor to the most
downstream IDU of the communication bus (terminal D1 and D2), as shown in fig 5.3.2,
terminal resistor is provided with each ODU.
5.4 Connect Communication Wire of Wired Controller
(1) Open electric box cover of indoor unit.
(2) Let the communication wire go through the rubber ring.
(3) Connect the communication wire to terminal H1 and H2 of indoor 4-bit wiring board.
(4) Fix the communication wire with wire clip on the electric box.

Multi Variable Air Conditioners Duct Type Indoor Unit
16
(5) Wiring instructions of remote receiving light board and wired controller:
1) Fig 5.4.1 shows the installation of wired controller.
(Standard)
H1H2
DSP1
DSP2
(Optional)
(Optional)
DSP1
DSP2
Fig 5.4.1 Fig 5.4.2
2) Fig 5.4.2 shows the installation of remote controller.
3) Wired controller and receiving light board can be installed at the same time. When operating
through a remote controller, both wired controller and the receiving light board can receive the
signals, as shown in Fig 5.4.3.
H1H2
DSP1
DSP2
Fig 5.4.3
5.5 Illuminate for Connection of Wired Controller and Indoor Units Network
(1) Communication wire of indoor unit and outdoor unit (or indoor unit) is connected to D1,D2.
(2) Wired controller is connected to H1,H2.
(3) One indoor unit can connect two wired controllers that must be set as master one and slave one.
(4) One wired controller can control 16 indoor unitS in maximum at the same time. (as shown in g5.5)
Notes:
① The type of indoor units must be the same if they are controlled by the same wired controller.
② When the indoor unit is controlled by two wired controllers, the addresses of the two wired
controllers should be different through address setting. Address 1 is for main controller; Address 2 is
for slave controller. Detailed setting please refer to the instruction manual of wired controller.

Multi Variable Air Conditioners Duct Type Indoor Unit
17
D1D2H1H2 D1D2 H1H2
D1 D2H1 H2
D1D2H1H2
D1 D2H1H2
D1 D2 H1H2
D1 D2H1H2
D1D2H1 H2
D1 D2 D1 D2
Fig 5.5