Gree GMV-ND Series User manual

EN ORIGINAL INSTRUCTIONS, VER. 01 2020-12-04
USER MANUAL
[ GMV COMPACT 360° CASSETTE UNITS ]
GMV-ND15–56T/E-T

IMPORTANT NOTE:
Read this manual carefully before installing or operating your new air conditioning unit.
Make sure to save this manual for future reference.

To Users
Thank you for selecting Gree’s 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 orinstruction concerning use of the appliance in a safe wayand
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 has gone through strictinspection and operational testbefore leaving the factory.
In order to avoid damage due to improper disassembly and inspection, which may impact the
normal operation of unit, please do notdisassemble the unit byyourself.You can contact with
the special maintenance center of our company if necessary.
(5) When the product is faulted and cannot be operated, please contact with our maintenance
center as soon as possible by providing the following information.
1) Contents of nameplate of product (model, cooling/heating capacity, product No., ex-
factory date).
2) Malfunction status (specify the situations before and after the error occurs).
(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. We
have the right to make necessary revision to the product from time to time due to the reason
of sales or production, and reserve the right to revise the contents without further notice.
(7) The final right to interpret for this instruction manual belongs to Gree ElectricAppliances Inc.
of Zhuhai.

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 withoutabiding by instruction manual or related regulations;
(6) After verification, the problem ordisputeis caused by the quality specification orperformance
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 ................................................................................................. 4
2.1 Names of Key Components.............................................................................................. 4
2.2 Rated Working Condition.................................................................................................. 4
3 Preparations for Installation..................................................................................... 4
3.1 Standard Fittings .............................................................................................................. 4
3.2 Installation Position Selection........................................................................................... 5
3.3 Requirements of Communication Wire Selection.............................................................. 6
3.4 Wiring Requirements........................................................................................................ 7
4 Installation Instructions ............................................................................................ 8
4.1 Indoor unit installation....................................................................................................... 8
4.2 Refrigerant Pipe Connection............................................................................................10
4.3 Drainage Pipe Installation and Drainage System Testing.................................................11
4.4 Panel Installation.............................................................................................................14
4.5 Installation of Wired Controller.........................................................................................16
5 Wiring Work.............................................................................................................. 16
5.1 Connection of Wire and Patch Board Terminal.................................................................17
5.2 Power Cord Connection...................................................................................................17
5.3 Connection of Communication Wire between Indoor Unit and Outdoor Unit (or indoor unit)
..............................................................................................................................................18
5.4 Connection of Communication Wire for Wired Controller.................................................19
5.5 Wiring Instructions of Wired Controller and Indoor Units Network....................................19
6 Routine Maintenance............................................................................................... 20
6.1 Cleaning of Filter .............................................................................................................21
6.2 Maintenance before the Seasonal Use............................................................................21
6.3 Maintenance after the Seasonal Use...............................................................................21
7 Table of Error Codes for Indoor Unit...................................................................... 21
8 Troubleshooting....................................................................................................... 22

Multi Variable Air Conditioners Compact Cassette 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.
NOTICE! 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 orserious injury.
As for above special places, please adopt special air conditioner with anti-corrosive or
anti-explosion function.
This Multi VRF System shall only be connected to an appliance suitable for the same
refrigerant.
All units in Manual Cover is a partial unit, complying with partial unit of IEC 60335-2-
40:2018, and must only be connected to other
units that have been confirmed as
complying to corresponding partial unit requirements of this international standard.
The electrical interface shall comply with electrical security requirement, voltage shall be
220-240V~50Hz or 208-230V~60Hz,current shall be referred to the table of “Dimension
of power cord and capacity of air switch” in Section 3.4, and safety class of construction
isⅠ.
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.

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
2
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.
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.

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
3
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°C.
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.
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.
Install units according to national wiring codes.
If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarly
qualified person in order to avoid a hazard.
An all-pole disconnection device which has at least 3mm clearances in all poles, and disconnection must be
incorporated in the fixed wiring in accordance with the wiring rules.
Gree ElectricAppliances, Inc. of Zhuhai will not assume responsibility for any personal injury or property
loss caused by improper installation, improper debugging, unnecessary repair or not following the instructions of
this manual.
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 productshould 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.

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
4
2 Product Introduction
2.1 Names of Key Components
Fig.2.1
No.
1
2
3
4
Name
Drainage device
Drainage Pipe
Air flow flap
Connection 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
3 Preparations for Installation
NOTE! This picture is for reference only, please refer to the actual product; the unit of dimension
is mm.
3.1 Standard Fittings
Please use the supplied standard fittings listed below as instructed.
No.
Name
Appearance
Q'ty
Usage
1 Remote controller 1+2 To control the indoor unit.
2 Drainage hose assembly 1 To connect the drainage pipe.
3 Special Nut
2 GMV-ND15-50T/E-T
1 GMV-ND56T/E-T

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
5
No.
Name
Appearance
Q'ty
Usage
4 Insulation 1 To insulate the gas pipe.
5 Insulation 1 To insulate the liquid pipe.
6 Flannelette 1 To prevent the communication wire
from reaching out the electric raceway.
7 Fastener(300mm) 1 To fasten the sponge.
8 Bolt sub-assy 4 Fix the panel.
9 Corrugated pipe 1 GMV-ND56T/E-T
10 Sponge 4 To insulate the drain pipe.
11 Gasket Mounting Board 1 Used to prevent gasket from falling off.
12 Fastener(200mm) 4 To fasten the sponge.
13 Bolt with Washer 4 To fix the installation paperboard on the
unit.
14 Enswathement 2 Used for winding the pipe connecting
the indoor and outdoor units.
15 Washer 10 To be used together with the hanger
bolt for installing the unit.
3.2 Installation Position Selection
(1) The location should be able to withstand the weight of unit.
(2) The water can be drained conveniently from drainage pipe.
(3) There should be no obstruction near air inlet and air outlet.
(4) Follow the installation distance required in the Fig.below to ensure sufficient space for
maintenance.
(5) The installation location should be far from heat sources, flammable or explosive gas, or
smog spread in the air.
(6) The appliance shall not be installed in the laundry.
(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 ensured, there may be noise if the electric wave is too strong).

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
6
Unit:mm
Fig.3.2
Unit:mm
Model H
GMV-ND15T/E-T
305
GMV-ND18T/E-T
305
GMV-ND22T/E-T
305
GMV-ND28T/E-T
305
GMV-ND36T/E-T
305
GMV-ND45T/E-T
305
GMV-ND50T/E-T
305
GMV-ND56T/E-T
305
NOTES!
①The unit shall be installed in accordance with national standards or local regulations.
②Only qualified personnel can carry out installation work, please contact with local dealer
before installation.
③Make sure all the installation work completed before energizing.
3.3 Requirements of Communication Wire Selection
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

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
7
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.
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
Dimension of power cord and capacity of air switch.
NOTES!
①The circuit breaker and power cord specification in above sheet are based on max power
(max current) of the unit.
②The power cord specification in above sheet is based on ambient temperature of 40°C.
③The circuit breaker specification in above sheet is based on ambient temperature of 40°C.
④If the working condition is different, please adjust it according to the specification sheet of
circuit breaker.
⑤Supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene
sheathed flexible cord (code designation 60245 IEC 57).

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
8
Model Power Supply Air Switch
Capacity (A)
Minimum
Sectional Area of
Grounding
Wire(mm
2
)
Minimum
Sectional Area of
Power Cord (mm2)
GMV-ND15T/E-T
220-240V-1ph-50Hz
208-230V-1ph-60Hz
6
1
1
GMV-ND18T/E-T
6
1
1
GMV-ND22T/E-T
6
1
1
GMV-ND28T/E-T
6
1
1
GMV-ND36T/E-T
6
1
1
GMV-ND45T/E-T
6
1
1
GMV-ND50T/E-T
6
1
1
GMV-ND56T/E-T
6
1
1
4 Installation Instructions
4.1 Indoor unit installation
4.1.1 Indoor Unit Dimension and Suspension Bolt Position
Fig.4.1.1
Below are dimensions of A, B, C, etc. for different models:
Unit: mm
Model
A
B
C
D
E
F
G
GMV-ND15T/E-T
620 580 570 505 550 530 530
GMV-ND18T/E-T
GMV-ND22T/E-T
GMV-ND28T/E-T
GMV-ND36T/E-T
GMV-ND45T/E-T
GMV-ND50T/E-T
GMV-ND56T/E-T

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
9
IMPORTANT!The drilling work and installation of unit must be carried out by qualified personnel.
4.1.2 Suspend the Indoor Unit
(1) Drill bolt holes and install bolts
1) Stick the paper pattern on the installation position; drill 4 holes according to the whole
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.4.1.2Fig.4.1.3
2) Insertthe M10 expansion boltinto the hole and then knock the nail intothe bolt,as shown
in Fig.4.1.4.
NOTE! 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.

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
10
(7) Remove the paper pattern.
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.
(2) Use a torque wrench to tighten up the flaring nut until the wrench gives out a click sound.
Fig.4.2
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

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
11
(3) The pipe should not be bent too much or it may crack. Use a pipe bender when bending the
pipe.
(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 Drainage 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 connectthe condensate drain pipeinto 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 waterleakage 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.
Never connect the drainage hole and drainage hose 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.
Fig.4.3.1
4.3.2 Installation of Drainage Pipe
(1) Drainage pipe should have the same diameter or larger diameter than the connection pipes
(PVC pipe, outside diameter 25mm, thickness≥1.5mm).
(2) Keep drainage pipe short and sloping downwards at a gradient of at least 1% for preventing
forming air bubbles.
(3) Insert the drainage hose into drain socket and then tighten the metal clamp securely.
(4) Warp the sealing pad over drainage hose and metal clamp for heat insulation.

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
12
(5) Make sure to perform insulation work for all drainage holes in the room in order to prevent
any possible water dropping due to dew condensation.
(6) Apply the suitable diameter for converging drainage pipe according to the operating capacity
of the unit, as show in Fig.4.3.2.1
Fig.4.3.2.1
(7) The horizontal pipe can’t be connected to vertical pipe in the same level; please select the
connection way as shown in following fig.
NO.1: Three-way connection of drainage pipe joints (Fig.4.3.2.2)
NO.2: Connection of downspout elbow (Fig.4.3.2.3)
NO.3: Inserting horizontal pipe connection (Fig.4.3.2.4)
Fig.4.3.2.2 Fig.4.3.2.3 Fig.4.3.2.4
(8) Drainage 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.
Unit:mm
Fig.4.3.2.5

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
13
(9) 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
vertical with the unit, the raising height should be less than C, as shown in Fig.4.3.2.6.
Unit:mm
Fig.4.3.2.6
Unit:mm
Model
A
B
C
GMV-ND15T/E-T
GMV-ND18T/E-T
GMV-ND22T/E-T
GMV-ND28T/E-T
GMV-ND36T/E-T
GMV-ND45T/E-T
GMV-ND50T/E-T
GMV-ND56T/E-T
265 935 885
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) 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.
2) If communication wire is not connected, communication malfunction “C0” will occur after
60sof energizing.In this case,the waterpump operatesautomatically. Check if thewater
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 is strongly recommend to do the drain test before ceiling decoration.

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
14
Unit:mm
Fig.4.3.3
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 it’s clearance-free between decorationpanels 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.

Multi Variable Air Conditioners Compact Cassette Type Indoor Unit
15
Fig.4.4.3
4.4.2 Panel Installation
(1) Detach the panel’s Corner Cap, there is a mark “piping side” on one of the 4 corners, adjust
the panel direction so as to keep the mark and fittings on the same corner, as shown in Fig.
4.4.4
Fig.4.4.4
(2) Adjust the position of panel to make the panel holes fix at the holes on the units
(3) Fix the 4 screws at the two side of panel, as shown in Fig.4.4.5.
Fig.4.4.5
(4) Detach the air inletgrille from panel, make a wiring connection of signal receiver. Notices that
the connection wire not stuck in the middle of body and panel, or may cause air leakage and
lead to condensation water drop.
(5) Tighten 4 screws at each corner of panel respectively, fix the panel on the body firmly.
(6) Tighten the screw until the thickness of sealing material between panel and indoor unit is
about 5-8mm.