Gree GMV-ND36ZD/A-T User manual

Owner's Manual
Original Instructions
Commercial Air Conditioners
Multi Variable Air Conditioners
Floor and Ceiling Type Indoor Unit
Models:
GMV-ND28ZD/A-T
GMV-ND36ZD/A-T
GMV-ND50ZD/A-T
GMV-ND56ZD/A-T
GMV-ND63ZD/A-T
GMV-ND71ZD/A-T
GMV-ND90ZD/A-T
GMV-ND112ZD/A-T
GMV-ND125ZD/A-T
GMV-ND140ZD/A-T
GMV-ND160ZD/A-T

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 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 has gone through strict inspection and operational test before leaving the
factory. In order to avoid damage due to improper disassembly and inspection, which
may impact the normal operation of unit, please do not disassemble the unit by yourself.
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 Electric
Appliances, 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 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 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 .................................................................................. 11
4.3 Drainage Pipe Installation and Drainage System Testing ....................................... 11
4.4 Wired Controller Installation ................................................................................... 14
5 Wiring Work ....................................................................................................... 14
5.1 Connection of Wire and Patch Board Terminal ....................................................... 15
5.2 Power Cord Connection ......................................................................................... 15
5.3 Connection of Communication Wire between Indoor Unit and Outdoor Unit (or
Indoor Unit) .................................................................................................................. 16
5.4 Connection of Communication Wire for Wired Controller........................................ 17
5.5 Wiring Instructions of Wired Controller and Indoor Units Network .......................... 18
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 ................................................................................................. 21

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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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 Floor and Ceiling 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°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.
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

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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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
2.2 Rated Working Condition
Test 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

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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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 Remote
Controller 1+2 To control the indoor unit
2 Special Nut
2 GMV-ND28~50ZD/A-T
1 GMV-ND56~160ZD/A-T
3 Corrugated Pipe 1 GMV-ND56~160ZD/A-T
4 M10X8 Nut with
Washer 8
To be used together with the
suspension bolt for installing the
unit.
5 Insulation 1 To insulate the gas pipe
6 Insulation 1 To insulate the liquid pipe
7 Paper Pattern for
Installation 1 Locate the drill hole on ceiling or
wall
8 Fastener 4 To fasten the sponge

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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.3.2 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 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.)
Unit:mm
Floor type
Ceiling type
Fig.3.2
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.

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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
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≤250m 2×0.75~2×1.2
5
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

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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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≤1000m ≥2×0.75 IEC 60227-5
1. If the wire diameter is enlarged to
2×1 mm2, the total
communication line length can
reach 1500m.
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 Requirement
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. If the working condition is different, please adjust it according to the specification
sheet of circuit breaker.
Dimension of power cord and capacity of air switch:
Models Power Specification
Air Switch
Capacity
(A)
Minimum Sectional
Area of Grounding
Wire(mm2)
Minimum
Sectional Area of
Power Cord (mm2)
GMV-ND28ZD/A-T
220-240V-1ph-
50Hz
208-230V-1ph-
60Hz
6 1 1
GMV-ND36ZD/A-T 6 1 1
GMV-ND50ZD/A-T 6 1 1
GMV-ND56ZD/A-T 6 1 1
GMV-ND63ZD/A-T 6 1 1
GMV-ND71ZD/A-T 6 1 1
GMV-ND90ZD/A-T 6 1 1
GMV-ND112ZD/A-T 6 1 1
GMV-ND125ZD/A-T 6 1 1
GMV-ND140ZD/A-T 6 1 1
GMV-ND160ZD/A-T 6 1 1

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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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:
Models A
(mm)
B
(mm)
C
(mm)
D
(mm)
H
(mm)
Drainage
pipe(Outer
Diameter ×
wall thickness)
(mm)
Outer diameter of
connection pipe(mm)
Liquid
pipe Gas pipe
GMV-ND28ZD/A-T
1220 225 1158 280 700
Ф17×1.75
6.35 9.52
GMV-ND36ZD/A-T
GMV-ND50ZD/A-T 6.35 12.7
GMV-ND56ZD/A-T 9.52 15.9
GMV-ND63ZD/A-T
GMV-ND71ZD/A-T
GMV-ND90ZD/A-T
1420 245 1354 280 700 9.52 15.9
GMV-ND112ZD/A-T
GMV-ND125ZD/A-T
GMV-ND140ZD/A-T 1700 245 1634 280 700
9.52 15.9
GMV-ND160ZD/A-T 9.52 19.05
Important: The drilling work must be carried out by qualified personnel.

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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4.1.2 Suspend the Indoor Unit
(1) Determine the location of the hanger through the paper template, and then remove the
paper template, as shown in Fig.4.1.2.1 left.
Fig.4.1.2.1
(2) Insert the anchor bolts into the drilled holes, and drive the pins completely into the
anchor bolts with a hammer, as shown in Fig.4.1.2.1 right.
(3) Remove the right and left side panels, as shown in Fig.4.1.2.2.
(4) Put the hanger bolt into the clasp of the indoor unit and tighten screws on the hanger
to prevent the indoor unit from moving, as shown in Fig.4.1.2.2.
(5) Reinstall and tighten the right and left side panels, as shown in Fig.4.1.2.3.
(6) Adjust the height of the unit to make the drain pipe slant slightly downward so that the
drainage will become much smoother, as shown in Fig.4.1.2.3.
Floor type
Fig.4.1.2.2

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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Ceiling type
Unit:mm
Fig.4.1.2.3
4.1.3 Leveling
The water level test must be done after installing the indoor unit to make the unit is
horizontal, as shown below.
Note: Adjust the height of the unit to make the drain pipe slant slightly downward so that
the drainage will become much smoother.
Fig.4.1.3

Multi Variable Air Conditioners Floor and Ceiling 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.
(2) Tighten the flaring nut with torque wrench.
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
(3) Use pipe bender 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 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 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.4.3.1.1 and arrange insulation tow
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 hose

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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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.4.3.1.1
(9) Connect the drainage pipe properly, as shown in Fig.4.3.1.2.
Fig.4.3.1.2
4.3.2 Drainage Pipe Installation
(1) Drainage pipe should have the same diameter or larger diameter than the connection
pipes (PVC pipe, outside diameter 17mm, thickness≥1.75mm).
(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, tighten the metal clamp securely.
(4) Warp the sealing pad over drain hose and metal clamp for heat insulation.
(5) Make sure to perform insulation work for all drainage piping in order to prevent any
possible water drop due to dew condensation.
(6) Apply the suitable diameter for converging drainage pipe according to the operating
capacity of the unit, as shown in Fig.4.3.2.1.

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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Unit:mm
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 figure.
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) 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.
Unit:mm
Fig.4.3.2.5
(9) Prepare the local piping at the connection point for the drain pipe, as shown in the
installation drawings.

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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Fig.4.3.2.6
4.3.3 Test of Drainage System
(1) Please test drainage system after electric work is finished. Inject approximately 1L
purified water to drain pan from air vent, ensure that not to splash the water over the
electrical components (e.g. water pump. etc.).
(2) During the test, please carefully check the drainage joint and make sure no any leakage
occur.
(3) It’s strongly recommended to do the drain test before ceiling decoration.
Fig.4.3.3
4.4 Wired Controller Installation
Wired controller is optional accessory. If wired controller is needed, please contact your
local dealer and install the wired controller according to the instruction manual.
Note:
Do perform the commissioning operation before first use, automatic addressing or other
settings, please refer to the manual of ODU.
5 Wiring Work
Notes:
①Units must be grounded 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 capacity of power supply must be sufficient and the sectional area of wires in the
room should be above 2.5 mm2.

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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④The unit should be powered by independent circuit and specific socket.
⑤The wiring should be in accordance with related regulations in order to ensure the units
reliable running.
⑥Install circuit breaker for branch circuit according to related regulations and electrical
standards.
⑦Crimp terminal or single wire must be applied for all wires.
⑧Keep cable away from refrigerant piping, compressor and fan motor.
⑨Do not change the wiring inside the unit.
⑩If there is strong electromagnetic interference around the unit, shielded twisted pair line
should be applied; the metal shielded layer of twisted pair wire must be grounded to
avoid electromagnetic interference.
⑪The communication wires should be separated from power cord and connection wire
between indoor unit and outdoor unit.
⑫Adjust 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 patch 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 insulation of the end of stranded wire by stripping and cutting tool.
2)Loosen the wiring screws on patch 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

Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
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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) Detach the electric box lid.
(2) Let the power cord pass through the wiring through-holes.
(3) Connect wires according to Fig. 5.2.
(4) Fix the power cord with wiring clamp.
5.3 Connection of Communication Wire between Indoor Unit and
Outdoor Unit (or Indoor Unit)
For units with single-phase power supply.
(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