Gree GMV-ND224PH/A-T User manual

Owner's Manual
Original Instructions
Commercial Air Conditioners
Multi Variable Air Conditioners
Ducted Type Indoor Unit
Models:
GMV-ND224PH/A-T
GMV-ND280PH/A-T

To Users
Thank you for selecting Gree product. Please read this instruction manual carefully before installing
and using the product, so as to master and correctly use the product. In order to guide you to correctly
install and use our product and achieve expected operating effect, we hereby instruct as below:
(1) 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.
(2) In order to ensure reliability of product, the product may consume some power under stand-by
status for maintaining normal communication of system and preheating refrigerant and lubricant.
If the product is not to be used for long, cut off the power supply; please energize and preheat
the unit in advance before reusing it.
(3) Please properly select the model according to actual using environment; otherwise it may impact
the using convenience.
(4) This product can’t be installed at corrosive, inflammable or explosive environment or the place
with special requirements, such as kitchen. Otherwise, it will affect the normal operation or
shorten the service life of the unit, or even cause fire hazard or serious injury. As for above
special places, please adopt special air conditioner with anti-corrosive or anti-explosion function.
(5) If the product needs to be installed, moved or maintained, please contact our designated dealer
or local service center for professional support. Users should not disassemble or maintain the
unit by themselves, otherwise it may cause relative damage, and our company will bear no
responsibilities.
(6) All the illustrations and information in the instruction manual are only for reference. In order to
make the product better, we will continuously conduct improvement and innovation. If there is
adjustment in the product, please subject to actual product.

Exception Clauses
Manufacturer will bear no responsibilities when personal injury or property loss is caused by the
following reasons:
(1) Damage the product due to improper use or misuse of the product;
(2) Alter, change, maintain or use the product with other equipment without abiding by the instruction
manual of manufacturer;
(3) After verification, the defect of product is directly caused by corrosive gas;
(4) After verification, defects are due to improper operation during transportation of product;
(5) Operate, repair, maintain the unit without abiding by instruction manual or related regulations;
(6) After verification, the problem or dispute is caused by the quality specification or performance
of parts and components that produced by other manufacturers;
(7) The damage is caused by natural calamities, bad using environment or force majeure.

Contents
1 Safety Notices (Please be Sure to Abide) .....................................................................1
2 Product Introduction ......................................................................................................3
2.1 Names of Key Components..................................................................................................... 3
2.2 Rated Working Condition......................................................................................................... 3
3 Preparations for Installation ..........................................................................................4
3.1 Standard Fittings ..................................................................................................................... 4
3.2 Location for Installation............................................................................................................ 4
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............................................................................................................ 12
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) 16
5.4 Connect Communication Wire of Wired Controller................................................................ 16
5.5 Illuminate for Connection of Wired Controller and Indoor Units Network .............................. 17
6 Routine Maintenance....................................................................................................19
6.1 Cleaning of Filter ................................................................................................................... 19
6.2 Maintenance before the Seasonal Use ................................................................................. 19
6.3 Maintenance after the Seasonal Use .................................................................................... 19
7 Table of Error Codes for Indoor Unit...........................................................................20
8 Troubleshooting............................................................................................................20

Multi Variable Air Conditioners Ducted Type Indoor Unit
1
1 Safety Notices (Please be Sure to Abide)
WARNING: If not abide strictly, it may cause severe damage to the unit or the people.
NOTE:If not abide strictly, it may cause slight or medium damage to the unit or the people.
This sign indicates that the operation must be prohibited. Improper operation may cause
severe damage or death to people.
This sign indicates that the items must be observed. Improper operation may cause damage
to people or property.
WARNING!
This product can’t be installed at corrosive, inflammable or explosive environment or the
place with special requirements, such as kitchen. Otherwise, it will affect the normal
operation or shorten the service life of the unit, or even cause fire hazard or serious injury.
As for above special places, please adopt special air conditioner with anti-corrosive or anti-
explosion function.
Please install the unit according
to instructions in this manual.
Read this manual carefully
before starting up or checking
the machine.
Installation should be performed
by dealer or qualified
technicians. Do not install the
product by yourself. Improper
installation may result in water
leakage, electric shock or fire
hazard.
Make sure the local power
supply is in accordance with
units before installation, and
check the power supply carefully.
This air conditioner must be
properly grounded through the
receptacle to avoid electric
shock. The grounding wire
shouldn’t be connected with gas
pipe, water pipe, lightning
arrester or telephone line.
Please use specialized
accessories or parts to carry out
installation, or water leakage,
electric shock, fire hazard may
resulted.
R410A refrigerant can produce
poisonous gas once it meets
fire, so please ventilate the room
immediately if refrigerant leaks
out during installation.
Diameter of power cord must be
large enough. Damaged power
cord and connecting wire must
be replaced by specialized
electric cable.
After the power cord is
Connected, please install the
cover of electric box to avoid
danger.
Nitrogen must be charged
according to technical
requirements.
Short circuit is forbidden. Do not
cancel the pressure switch in
case the unit may be damaged.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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For units with wired controller, do
not connect power supply until
the wired controller is well
installed. Otherwise, the wired
controller cannot be used.
When the installation is finished,
please check and make sure the
drain pipe, pipeline and electric
wire are all well connected in
order to avoid water leakage,
refrigerant leakage, electric
shock or fire hazard.
Do not extend fingers or objects
into air outlet or air return grille.
If you use gas heater or
petroleum heater in the same
room, please open the door or
window to maintain good air
circulation in case the room may
lack of oxygen.
Never start or stop the air
conditioner by inserting or
removing the power cord.
Do not turn off the air
conditioner until it runs for at
least 5 minutes. Otherwise, oil-
return of the compressor will be
affected.
Children are not allowed to
operate the air conditioner. Do not operate the air conditioner with wet hands.
Please turn the unit off and
unplug your air conditioner
before cleaning. Otherwise, it
may cause electric shock or
personal injury.
Do not spray water on the air
conditioner or it will cause
malfunction or electric shock.
Do not expose the air conditioner
directly to water or place it in a
damp or corrosive environment.
Connect power supply 8 hours
before operation. Do not
disconnect power if you want to
stop the unit in a short period of
time, e.g. in one night. (This is
for protecting the compressor.)
Volatile liquid like thinner or
gasoline will damage the
appearance of air conditioner.
Please use soft dry cloth or wet
cloth with mild detergent to clean
the outer case of air conditioner.
During Cooling mode, indoor
temperature should not be set
too low. Keep the difference
between indoor temp and
outdoor temp within 5℃.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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If abnormal condition occurs (e.g.
unpleasant smell), please turn off
the unit at once and disconnect
power supply. Then contact
GREE service center. If the air
conditioner continues to operate
despite of abnormal condition,
the unit may be damaged and it
may cause electric shock or fire
hazard.)
Do not repair the air conditioner
by yourself. Improper repair will
cause electric shock or fire
hazard. Please contact GREE
service center and have it
repaired by professional
technicians.
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 Gree Electric
Appliances, Inc. of Zhuhai.
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.
2 Product Introduction
2.1 Names of Key Components
Fig.2.1.1
2.2 Rated Working Condition
—
Indoor Side Condition
Outdoor Side Condition
Dry Bulb Temp(℃) Wet Bulb Temp(℃) Dry Bulb Temp(℃) Wet Bulb Temp(℃)
Rated Cooling
27
19
35
24
Rated Heating
20
15
7
6

Multi Variable Air Conditioners Ducted Type Indoor Unit
4
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 fittings listed below as instructed.
No.
Name
Appearance
Q'ty
Usage
1 Wired Controller 1pc. To control the indoor unit
2 Special Nut 1pc. To be used for connecting the
refrigerant pipe
3 M10×8 Nut with Washer 4pcs. To be used together with the hanger
bolt for installing the unit
4 M10 Nut (M10×8.4 Nut) 8 pcs. To be used together with the hanger
bolt for installing the unit
5 M10 Washer (Spring Washer
M10×2.6)
4 pcs. To be used together with the hanger
bolt for installing the unit
6 M10 Washer (M10×Φ30×2.5) 4 pcs. To be used together with the hanger
bolt for installing the unit
7 Insulation 2 pc. To insulate the gas/liquid pipe
8
Fastener
8 pcs.
To fasten the sponge
9 Hanger 4 pcs. To fix the indoor unit
10 M8 Nut (M8×6.8) 8 pcs. To fix the hook on the cabinet of the
unit
11 M8 Washer (Spring
Washer M8×2.1)
8 pcs. To fix the hook on the cabinet of the
unit
12 M8 Washer (M8×Φ16×1.5) 8 pcs. To fix the hook on the cabinet of the
unit
13
paper pattern for installation
—
1 pc.
Locate the drill hole on ceiling
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, inflammable 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).

Multi Variable Air Conditioners Ducted Type Indoor Unit
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Unit: mm
Fig.3.2.1
NOTES!
①Installation of the unit must be in accordance with National Electric Codes and local regulations.
②Improper 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.
③Do not connect power until all installation work is finished.
3.3 Requirements for Communication Line
NOTE!
If air conditioner used under strong electronic-magnetic interference circumstance, STP (shielded
twisted pair) communication cable must be adopted.
3.3.1 Select Communication Line for Indoor Unit and Wired Controller
Fig.3.3.1
Material type
Total length of
communication line
between indoor unit and
wired controller L (m)
Wire size
(mm²)
Material
Standard Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤250 2×0.75
~2×1.25
IEC 60227-
5
1. Total length of communication line
can't exceed 250m.
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.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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3.3.2 Select Communication Line for Indoor Unit and Outdoor Unit
Fig.3.3.2
Material Type
Total Length L (m) of
Communication Cable
between Indoor Unit
and Indoor (Outdoor)
Unit
Wire size
(mm²)
Material
Standard Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤1000 ≥2×0.75 IEC 60227-5
1. If the wire diameter is enlarged to 2×1
mm2
, the total communication 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
Power Cord Size and Air Switch Capacity
Model Power Cord Size
Air Switch
Capacity
(A)
Minimum Sectional
Area of Ground
Wire(mm
²
)
Minimum Sectional Area
of Power Cord(mm²)
GMV-ND224PH/A-T
220-240V ~50Hz
208-230V ~60Hz
10
1.0
1.0
GMV-ND280PH/A-T
10
1.0
1.0
NOTES!
①Use copper wire only as unit’s power cord. Operating temperature should be within its rated
value.
②If the length of power cord is more than 15 m, please increase properly the sectional area of
power cord to avoid overload, which may cause accident.
③Above selection requirements: Power cord size is based on BV single-core wire (2~4pc) at 40℃
ambient temperature when laying across plastic pipe. Air switch is D type and used at 40℃. If
actual installation condition varies, please lower the capacity appropriately according to the
specifications of power cord and air switch provided by manufacturer.
④Install cut-off device near the unit. The minimum distance between each stage of cut-off device
should be 3 mm (The same for both indoor unit and outdoor unit).

Multi Variable Air Conditioners Ducted Type Indoor Unit
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4 Installation Instructions
4.1 Installation of Indoor Unit
4.1.1 Outline Dimension and Installation Spots
Equip with an 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.
Below are the outline dimension applicable to indoor units
Fig.4.1.1
Below are dimensions of A, B, C, etc. for different models:
Unit: mm
Model
A
B
C
D
E
F
GMV-ND224PH/A-T
1353
632
992
1150
192
327
GMV-ND280PH/A-T
1563
707
992
1350
192
402
4.1.2 Suspend the indoor unit
(1) 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 Fig.4.1.3.
Unit: mm
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 Fig.4.1.4, and then remove the paper pattern.
NOTE!
The length of bolt depends on the installation height of the unit, bolts are field supplied.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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Fig.4.1.4
(2) Install the indoor unit temporarily
Assemble suspension bolt on the expansion bolt, attach the hanger bracket to the suspension bolt.
Be sure to fix it securely by using a nut and washer from upper and lower sides of the hanger bracket.
The washer fixing plate can be used to prevent the washer from falling.
Fig.4.1.5
NOTES!
①Before operation, please prepare all pipelines (connection pipe, drainage hose) and wires
(connection wire for wired controller, connection wire for indoor unit).
②When drilling holes on ceiling (air return outlet or air outlet), you can need to reinforce the ceiling
to prevent vibration. For details, please consult user or builder.
③If the strength of the ceiling is not good, please install a beam bracket, and then put the unit on
the beam bracket.
(3) Adjust the unit to the right position.
(4) Check the level of the unit and then tighten the nut.
After the indoor unit is installed, remember to check the horizontal status of the whole unit. It should
be horizontal from front to back and slant 1% from left to right, following the drainage direction.
Fig.4.1.6

Multi Variable Air Conditioners Ducted Type Indoor Unit
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4.2 Refrigerant Pipe Connection
(1) Aim the flaring port of copper pipe at the center of screwed joint and then tighten the flaring nut
with hand as shown in Fig.4.2.1
(2) Tighten the flaring nut with torque wrench.
Fig.4.2.1
Torque for tightening nut
Pipe diameter (mm)
Torque (N·m)
Φ6.35
15~30
Φ9.52
35~40
Φ12.7
45~50
Φ15.9
60~65
Φ19.05
70~75
(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 firmly with tape.
4.3 Drainage Pipe Installation and Drainage System Testing
4.3.1 Notice for Installation of Drain Pipe
(1) It is not allowed to connect the condensate drain pipe into waste pipe or other pipelines which
are likely to produce corrosive or peculiar smell to prevent the smell from entering indoors or
corrupt the unit.
(2) It is not allowed to connect the condensate drain pipe into rain pipe to prevent rain water from
pouring in and cause property loss or personal injury.
(3) Condensate drain pipe should be connected into special drain system for air conditioner.
(4) The drainage pipe should be short and the gradient downwards should be at least 1%~2% in
order to drain condensation water smoothly.
(5) The diameter of drainage hose should be bigger or equal to the diameter of drainage pipe joint.
(6) Install drainage pipe according to the following Fig. and arrange insulation to the drainage pipe.
Improper installation may lead to water leakage and damp the furniture and other things in the
room.
(7) 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.
(8) When the drainage pipelines are used for several units, the position of pipeline should be about
100mm lower than the drainage port of each unit. In this case, thicker pipes should be applied.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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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. Model
with water pump will be provided with drain hose, while other models please prepare the drain
hose by yourself.
(2) Tighten the pipe clamp, with the distance between screw nut and hose smaller than 4mm.
(3) Use sealing plate to make the pipe clamp and hose insulated, as shown in Fig.4.3.3.
Fig.4.3.2
Unit: mm
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.
Unit: mm
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.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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Fig.4.3.5
(8) The horizontal pipe can be connected to vertical pipe in the same level; please select the
connection way as shown in following Fig.
No.1: Connection of drainage pipe joints (Fig.4.3.6)
No.2: Connection of downspout elbow (Fig.4.3.7)
No.3: Inserting pipe connection (Fig.4.3.8)
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 1000~1500 mm.
Unit: mm
Fig.4.3.9
4.3.3 Test of Drainage System
(1) Inject some water to the water tray of indoor unit as following:
1) Connect the drain hose to the other drain connection pipe of water tray and inject
approximately 1L water. (Remove the drain hose after finishing testing and then put on the
plug of water tray.)
2) Spray 1L water on evaporator with sprayer.
Fig.4.3.10

Multi Variable Air Conditioners Ducted Type Indoor Unit
12
(2) Check if the water drains smoothly from the drain pipe and check if there is water leakage on
the connection pipe.
(3) Arrange insulation of drain hose and pipe clamp after checking the drain system.
4.4 Installation of Air Duct
NOTES!
①There 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.
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.
②Each air-out duct and air-return duct should be fixed on a pre-made board with iron frame. The
junction of air duct should be well-sealed in order to prevent air leakage.
③The design and construction of air duct should comply with national requirements.
④The edge of air-return duct is suggested to be more than 150mm away from the wall. Add a filter
to the air-return opening.
⑤Please 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 (Offices, rest area, etc).
4.4.1 Installation of Air-out Duct
Installation of the Rectangular Duct
Fig.4.4.1
4.4.2 Shape and Size of Air Outlet and Air-return Opening
Unit: mm
Fig.4.4.2 Air Outlet

Multi Variable Air Conditioners Ducted Type Indoor Unit
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Fig.4.4.3 Air-return Opening
Unit: mm
Model
Size of Air Outlet
Size of Air –return Opening
A
B
C
D
GMV-ND224PH/A-T
192
992
1150
327
GMV-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 finish 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!
①Under 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.
②If the length of power cord is more than 15 m, please increase properly the sectional area of
power cord to avoid overload, which may cause accident.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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External static pressure Static pressure level of indoor fan motor
50 Pa 01
60 Pa 02
70 Pa 03
90 Pa 04
100 Pa 05
120 Pa 06
150 Pa
07
180 Pa 08
200 Pa 09
NOTES!
①Keep in mind that a shortage of airflow quantity or water leakage will result because the air
conditioner will be operated outside the rated range of airflow quantity if the external static
pressure is wrongly set.
②The 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!
①Units must be earthed securely, or it may cause electric shock.
②Please carefully read the wiring diagram before carry out the wiring work, incorrect wiring could
cause malfunction or even damage the unit.
③The unit should be powered by independent circuit and specific socket.
④The wiring should be in accordance with related regulations in order to ensure the units reliable
running.
⑤Install circuit breaker for branch circuit according to related regulations and electrical standards.
⑥Keep cable away from refrigerant pipings, compressor and fan motor.
⑦The communication wires should be separated from power cord and connection wire between
indoor unit and outdoor unit.
⑧Adjust 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 Fig.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.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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(2) The connection of stranded wire (as shown in Fig.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.
Unit: mm
Fig.5.1.1 Fig.5.1.2
5.2 Power Cord Connection
NOTES!
①Every unit should be equipped with a circuit breaker for short-circuit and overload protection.
②During operation, all indoor units connected to the same outdoor unit system must be kept
energized status. Otherwise, the unit can’t operate normally.
Fig.5.2.1
(1) Detach the electric box lid.
(2) Let the power cord pass through the wiring through-holes.
(3) Connect wires according to Fig. 5.2.1

Multi Variable Air Conditioners Ducted Type Indoor Unit
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(4) Fix the power cord 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 Fig.5.3.1.
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.
(5) Wiring instructions of remote receiving light board and wired controller:
1) Fig.5.4.1 shows the installation of wired controller.