Gree GMV-ND22T/C-T User manual

Owner's Manual
Original Instructions
Commercial Air Conditioners
Multi Variable Air Conditioners
Cassette Type Indoor Unit
Models:
GMV-ND22T/C-T GMV-ND28T/C-T
GMV-ND36T/C-T GMV-ND45T/C-T
GMV-ND50T/C-T GMV-ND56T/C-T
GMV-ND63T/C-T GMV-ND71T/C-T
GMV-ND80T/C-T GMV-ND90T/C-T
GMV-ND100T/C-T GMV-ND112T/C-T
GMV-ND125T/C-T GMV-ND140T/C-T
GMV-ND160T/C-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 ................................................................................................. 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 Requirement.............................................................................................................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..................................................10
4.4 Panel Installation ...............................................................................................................13
4.5 Wired Controller Installation ..............................................................................................15
5 Wiring Work.............................................................................................................. 15
5.1 Connection of Wire and Patch Board Terminal..................................................................16
5.2 Power Cord Connection ....................................................................................................16
5.3 Connection of Communication Wire between Indoor Unit and Outdoor Unit (or Indoor Unit)
.................................................................................................................................................17
5.4 Connection of Communication Wire for Wired Controller..................................................18
5.5 Instructions on Connecting Wired Controller and Indoor Units Network ...........................19
6 Routine Maintenance............................................................................................... 20
6.1 Cleaning of Filter ...............................................................................................................20
6.2 Maintenance before the Seasonal Use .............................................................................20
6.3 Maintenance after the Seasonal Use ................................................................................20
7 Table of Error Codes for Indoor Unit...................................................................... 21
8 Troubleshooting....................................................................................................... 22

Multi Variable Air Conditioners 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.
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.
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, 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.
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.

Multi Variable Air Conditioners Cassette Type Indoor Unit
2
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 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℃.
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 Electric Appliances, 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 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.

Multi Variable Air Conditioners Cassette Type Indoor Unit
4
2 Product Introduction
2.1 Names of Key Components
Fig.2.1
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
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
Use the following provided accessories according to the requirement.
No.
Name
Appearance
Q'ty
Usage
1 Wireless controller 1 To control the indoor unit.
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 GMV-ND22~50T/C-T
1 GMV-ND56~160T/C-T
7
Corrugated pipe
1
GMV-ND56~160T/C-T
8 M10 Washer 10 To be used together with the hanger bolt for
installing the unit.

Multi Variable Air Conditioners Cassette Type Indoor Unit
5
No.
Name
Appearance
Q'ty
Usage
9 Insulation 2 To i nsulate the gas/ liquid pipe
10 Sponge 4 To insulate the drain pipe.
11
Fastener
4
To fasten the sponge.
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 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).
Unit: mm
Fig.3.2
Model
H(mm)
GMV-ND22~100T/C-T
275
GMV-ND112~160T/C-T
325
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.
④The appliances are not accessible to general public.

Multi Variable Air Conditioners Cassette Type Indoor Unit
6
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 Selection of communication wire between indoor unit and wired controller
Fig.3.3.1
Wire type
Total length of
communication wire between
indoor unit and wired
controller (m)
Wire diameter
(mm²) Wire standard Remark
Light/normal PVC
hose 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 Selection of Communication Wire between Indoor Unit and Indoor Unit (or outdoor
unit)
Fig.3.3.2