Gree GMV-ND07TD/A-T User manual

Owner's Manual
Original Instructions
Commercial Air Conditioners
Multi Variable Air Conditioners
One-way Cassette Type Indoor Unit
Models:
GMV-ND07TD/A-T(U)
GMV-ND09TD/A-T(U)
GMV-ND12TD/A-T(U)

Preface
For correct installation and operation, please read all instructions carefully. Before reading the
instructions, please be aware of the following items:
This is the safety alert symbol. It is used to alert you to potential personal
injury hazards. Obey all safety messages that follow this symbol to avoid
possible injury or death.
This mark indicates procedures which, if improperly performed, might
lead to the death or serious injury of the user.
This mark indicates procedures which, if improperly performed, might
possibly result in personal harm to the user, or damage to property.
NOTICE is used to address practices not related to personal injury.
(1) Instructions for installation and use of this product are provided by the manufacturer.
(2) Installation must be performed in accordance with the requirements of NEC and CEC by
authorized personnel only.
(3) For the safe operation of this unit, please read and follow the instructions carefully.
(4) 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.
(5) Direct operators or maintainers should well keep this manual.
(6) If this unit fails to operate normally, please contact our service center as soon as possible
and provide the following information:
1) Content on the nameplate (model number, cooling capacity, production code, ex-factory
date).
2) Malfunction details (before and after the malfunction occurs).
(7) 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.
(8) Installation must be performed in accordance with the requirements of NEC and CEC by
authorized personnel only.
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.

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 Precautions ................................................................................................ 1
2 Product Introduction............................................................................................. 2
2.1 Names of Key Components............................................................................................2
2.2 Rated Working Condition................................................................................................2
3 Preparations for Installation................................................................................. 2
3.1 Standard Fittings.............................................................................................................2
3.2 Installation Position Selection.........................................................................................3
3.3 Requirements for Communication Line...........................................................................4
3.4 Wiring Requirements ......................................................................................................6
4 Installation Instructions ........................................................................................ 6
4.1 Installation of Indoor Unit................................................................................................6
4.2 Refrigerant Pipe Connection...........................................................................................8
4.3 Drainage Pipe Installation and Drainage System Testing...............................................9
4.4 Panel Installation...........................................................................................................12
4.5 Installation of Wired Controller......................................................................................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.......................................................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.................................................................. 19
8 Troubleshooting .................................................................................................. 20

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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1 Safety Precautions
(1) 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 the above special places, please adopt special air conditioner with anti-corrosive or
anti-explosion function.
(2) Follow this manual to complete the installation work. Please read this manual carefully
before turning on or repairing the unit.
(3) Installation should be conducted by the dealer or qualified personnel. Please do not attempt
to install the air conditioner by yourself. Improper installation may lead to water leakage,
electric shock or fire hazard, etc.
(4) Before installation, please check whether the power supply is complied with that specified on
the nameplate and check the safety of the power supply.
(5) The air conditioner must be grounded reliably for avoiding electric shock. Please do not
connect the earthing wire to gas pipe, water pipe, lightning rod or telephone line.
(6) Be sure to use special accessories and parts for installation to prevent water leakage,
electric shock and fire hazard, etc.
(7) If refrigerant leakage happens, please ventilate the room immediately.
(8) Diameter of power cord should be large enough. The damaged power cord and connection
wire must be replaced with special cables.
(9) When the power cord is connected, please fix the electric box cover properly to avoid safety
accidents.
(10) Never fail to comply with the nitrogen-charging welding process. Do charge nitrogen when
welding the pipes.
(11) Never short circuit or cancel the pressure switch to prevent unit damage.
(12) As for the unit controlled by the wired controller, connect the wired controller well firstly and
then energize the unit; otherwise, the unit can’t operate normally.
(13) When installation is finished, please check whether the drainage pipes, pipelines and electric
wires are connected correctly to avoid water leakage, refrigerant leakage, electric shock or
fire, etc.
(14) Do not insert fingers or objects into air outlet or air return grille.
(15) Open the door and window frequently to keep good ventilation for avoiding oxygen deficit
when gas heater or oil heater is used in the room.
(16) Never plug in or unplug the power plug directly to turn on or turn off the air conditioner.
(17) Once the air conditioner is turned on, it can be turned off only after it has operated for 5min
at least; otherwise, it will affect the oil return of compressor.
(18) Do not allow children to operate this air conditioner.
(19) Do not operate this air conditioner with wet hands.
(20) The air conditioner can be cleaned only when it has been turned off and the power has been
cut off; otherwise, it may cause electric shock or injury.
(21) Never spray or flush water towards the air conditioner; otherwise, malfunction or electric
shock may happen.
(22) Do not expose the air conditioner to the moist or corrosive environment.
(23) Put through the power 8 hours in advance before operation. Do not cut off the power when
the air conditioner stops operation for only about one night (protect the compressor).
(24) Volatile liquid, such as diluent or gasoline, will damage the appearance of air conditioner.
Only soft dry cloth and wet cloth dipped with neutral detergent can be used to clean the outer
case of air conditioner.

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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(25) Under cooling mode, please don't set the room temperature too low; keep the temperature
difference between indoor and outdoor within 5
℃
(
℉
).
(26) If there are any abnormal circumstances (such as burning smell, etc.), please turn off the unit
and cut off the main power supply immediately, and then contact Gree appointed service
center. If those abnormal circumstances still exit, the unit may be damaged and it may lead
to electric shock or fire hazard.
(27) Do not repair the unit by yourself. Wrong maintenance may cause electric shock or fire
hazard. Please contact Gree appointed service center for help.
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.
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
26.7(80.0)
19.4(67.0)
35(95.0)
24(75.2)
Rated Heating
21.1(70.0)
15.6(60.0)
7(44.6)
6(42.8)
3 Preparations for Installation
NOTICE! Product graphics are only for reference. Please refer to actual products.
Unspecified measure unit is mm(inch).
3.1 Standard Fittings
Please use the supplied standard fittings listed below as instructed.
No.
Name
Appearance
Q'ty
Usage
1 Wireless controller 1 To control the indoor unit

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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No.
Name
Appearance
Q'ty
Usage
2 Paper pattern for
installation 1 Locate the drill hole on ceiling
3 Tapping screw with
washer 4 Fix paper pattern
4 Washer fixing plate 4 Prevent the washer from
falling off
5 Drain Hose Assembly 1
To connect with the hard PVC
drain pipe
6 Special Nut 2 To be used for connecting the
refrigerant pipe
7 M10 Washer 10
To be used together with the
hanger bolt for installing the
unit.
8 Self-tapping screw 10 For mounting panels
9 Insulation 1 To insulate the gas pipe
10 Insulation 1 To insulate the liquid pipe
11 Sponge 1 To insulate the drain pipe
12 Fastener 4 To fasten the sponge
13 Remote controller
holder 1 Used for holding the remote
controller
14 Tapping screw 2 Used for fixing the remote
controller holder
3.2 Installation Position Selection
(1) The appliance shall not be installed in the laundry.
(2) The location should be able to withstand the weight of unit.
(3) The water can be drained conveniently from drainage pipe.
(4) There should be no obstruction near air inlet and air outlet.
(5) Follow the installation distance required in the Fig.3.2.1 below to ensure sufficient space
for maintenance.
(6) The installation location should be far from heat sources, flammable or explosive gas, or
smog spread in the air.
(7) The indoor unit, outdoor unit, power cord and connection electricity wire should be at
least 1m from television and radio in order to prevent interference and noise (Even
though 1m distance is ensure, there may be noise if the electric wave is too strong.).
(8) This indoor unit may be installed on ceilings up to 2.5m(98-3/8inch) to avoid accidental
touching.

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Unit: mm(inch)
Fig.3.2.1
Model
H
GMV-ND07TD/A-T(U)
207(8 1/8)
GMV-ND09TD/A-T(U)
207(8 1/8)
GMV-ND12TD/A-T(U)
207(8 1/8)
(1) The unit shall be installed in accordance with national standards or local regulations.
(2) Only qualified personnel can carry out installation work, please contact with local dealer
before installation.
(3) Make sure all the installation work completed before energizing.
3.3 Requirements for Communication Line
NOTICE! 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

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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Material type
Total length of
communication line
between indoor unit
and wired controller
L (m/ft.)
Wire size
(mm²/AWG)
Material
Standar
d Remarks
Light/Ordinary
polyvinyl
chloride
sheathed
cord. (60227
IEC 52
/60227 IEC
53)
L≤250m
(L≤820ft.)
2×0.75
~2×1.25
(2×AWG18
~2×AWG16)
IEC
60227-5
1.Total length of
communication line can't
exceed 250m (820ft.).
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.
3.3.2 Selection of Communication Wire between Indoor Unit and Indoor Unit (or
Outdoor Unit)
Fig.3.3.2
Material Type
Total Length L (m/ft.)
of Communication
Cable between Indoor
Unit and Indoor
(Outdoor) Unit
Wire size
(mm²/AWG) Material Standard Remarks
Light/Ordinary
polyvinyl
chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤1000m
(L≤3280ft.) ≥2×0.75 (≥2×AWG18) IEC 60227-5
1.If the wire diameter is
enlarged to
2×1mm²(2×AWG16), the
total communication line
length can reach
1500m(4920ft.).
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.

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3.4 Wiring Requirements
Power Cord Size and Air Switch Capacity
Model
Power Supply
MCA(A)
MOP(A)
GMV-ND07TD/A-T(U)
208/230V-1ph-60Hz
0.375
15
GMV-ND09TD/A-T(U)
0.375
15
GMV-ND12TD/A-T(U)
0.375
15
(1) An all-pole disconnection switch having a contact separation of at least 3mm(1/8 inch) in all
poles should be connected in fixed wiring.
(2) The circuit breaker and power cord specification in above sheet is based on max
power(max current) of the unit.
(3) The power cord specification in above sheet is based on ambient temperature of 40
℃
(104
℉
).
(4) The circuit breaker specification in above sheet is based on ambient temperature of 40
℃
(104℉). If the working condition is different, please adjust it according to the specification
sheet of circuit breaker.
4 Installation Instructions
4.1 Installation of Indoor Unit
4.1.1 Ceiling Opening Dimension and Suspension Bolt Position. Unit: mm(inch)
Fig.4.1.1
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 (2-3/8~2-3/4
inch), as shown in Fig.4.1.3.

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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Unit: mm(inch)
Fig.4.1.2Fig.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.
NOTICE! The length of bolt depends on the installation height of the unit; bolts are field supplied.
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 will prevent the washer from falling.
(3) 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 fix the
corners of the waterspout at the drainage pipe by screws.
(4) Adjust the unit to the right position.
(5) Check the level of the unit
The indoor unit is equipped with build-in water pump and float switch, verify the levelness of 4
directions by level gauge or vinyl tube (filled with water) respectively.
(6) Remove the washer locating plate and then tighten the nut on it.
(7) Remove the paper pattern.

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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Fig.4.1.5
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
Pipe diameter(mm/inch)
Torque(N•m)
Φ6.35(1/4)
15~30
Φ9.52(3/8)
35~40
Φ12.7(1/2)
45~50
Φ15.9(5/8)
60~65
(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.

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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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.4.3.1. 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 (4 inch) lower than the drainage port of each unit. In this case, thicker
pipes should be applied.
Fig.4.3.1
4.3.2 Drainage Pipe Installation
(1) Drainage pipe should have the same diameter or larger diameter than the connecting
pipes (PVC pipe, outside diameter 25mm (1 inch), thickness≥1.5mm (1/16 inch)).
(2) Keep drainage pipe short and sloping downwards at a gradient of at least 1% for
preventing forming air bubbles.
(3) If the gradient of drainage pipe could not meet the installation requirements, raising pipe
should be applied.
(4) Insert the drainage hose into drain socket, tighten the metal clamp securely.
(5) Warp the sealing pad over drain hose and metal clamp for heat insulation.

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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(6) Make sure to perform insulation work for all drainage piping in order to prevent any
possible water drop due to dew condensation.
(7) Apply the suitable diameter for converging drainage pipe according to the operating
capacity of the unit.
Unit: mm(inch)
Fig.4.3.2
(8) The installation height of raising pipe for drainage should be lower than B. The gradient
from raising pipe towards drainage direction should be at least 1%~2%. If the raising pipe
is vetical with the unit, the raising height should be less than C.
Unit: mm(inch)
Fig.4.3.3
Model
A (mm/inch)
B(mm/inch)
C(mm/inch)
GMV-ND07TD/A-T(U)
GMV-ND09TD/A-T(U)
GMV-ND12TD/A-T(U)
100(3-15/16) 1100(43-5/16) 1050(41-5/16)
(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 (39-3/8~59 inch).

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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Unit: mm(inch)
Fig.4.3.4
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.).
1) 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) In case of commissioning finished, please energize the IDUs and switch to cooling or
dry mode, meanwhile, the water pump operates, you can check the draining through
the drain socket.
3) If communication wire is not connected, communication malfunction “C0” will occur
after 60s of energizing. In this case, the water pump operates automatically. Check if
the water pump drains normally through drainage port. The water pump will stop
automatically after running for 10mins.
(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.
Unit:mm(inch)
Fig.4.3.5

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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4.4 Panel Installation
4.4.1 Notices for Installation
(1) Improper decorative panel installation could cause the following problems.
Fig.4.4.1
(2) Ensure that its clearance-free between decoration panel and ceiling board after
installation, if not, please adjust the body position.
Fig.4.4.2
(3) Connect the decoration panel terminals (Female) to body terminals (male) as shown in
Fig.4.4.3.
Fig.4.4.3

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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4.4.2 Panel Installation
(1) Remove the grille from the panel, and then open the horizontal louver.
(2) Aim the screw hole on panel at the corresponding screw hole on main unit.
(3) Screw up the screws on corresponding holes and then install the corresponding screw
cover.
(4) Close the horizon lover, connect the butt terminal and arrange the wires.
(5) After tightening screws, reinstall the air inlet grille.
Fig.4.4.4
4.5 Installation of Wired Controller
Please refer to User Manual of Wired Controller for the installation details.
NOTICE! 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.

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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5 Wiring Work
Before obtaining access to terminals, all supply circuits must be disconnected.
(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 specific 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
(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 Fig.5.1.1)
1) Strip about 25mm (1 inch) 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 Fig.5.1.2)
1) Strip about 10mm (3/8 inch) 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(inch)
Fig.5.1.1 Fig.5.1.2

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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5.2 Power Cord Connection
(1) Every unit should be equipped with a circuit breaker for short-circuit and overload
protection. In general, circuit breaker is at OFF status.
(2) During operation, all indoor units and outdoor units belonging to the same 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.
(4) Fix the power cord with wiring clamp.
(5) The wire diameter of power cord can’t be less than 18AWG.
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

Multi Variable Air Conditioners One-way Cassette Type Indoor Unit
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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) Wired controller is shown as Fig.5.4.1, wireless controller is shown as Fig.5.4.2
signal receiver is provided with panel as standard accessory.
Fig.5.4.1 Fig.5.4.2
2) Both IDU and wired controller are equipped with signal receiver, and available for
wireless control respectively.