Gree GMV series User manual

Owner's Manual
Original Instructions
Commercial Air Conditioners
GMV DC Inverter VRF
Models:
GMV-785W/A-M
GMV-900W/A-M
Copyright 2018. This translation is property of GREE PRODUCTS SL. All rights reserved. Total or partial reproduction without its express authorization is prohibited.

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
actory. 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) For personal injury or property loss and damage caused by improper operation such
as improper installation and debugging, unnecessary maintenance, violation of related
national laws and rules and industrial standard, and violation of this instruction manual,
etc., we will bear no liability.
(6) 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).
(7) 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.
(8) The final right to interpret for this instruction manual belongs to Gree Electric
Appliances Inc. of Zhuhai.
Copyright 2018. This translation is property of GREE PRODUCTS SL. All rights reserved. Total or partial reproduction without its express authorization is prohibited.

Contents
1 Safety Notices (Please be sure to abide)............................................................. 1
2 Product Introduction ............................................................................................ 4
2.1 Names of Main Parts ................................................................................................ 4
2.2 Combinations of Indoor and Outdoor Units ............................................................... 4
2.3 The Range of Production Working Temperature ....................................................... 5
3 Preparation before Installation ............................................................................. 6
3.1 Standard Parts ......................................................................................................... 6
3.2 Installation Site ......................................................................................................... 6
3.3 Piping Work Requirements ..................................................................................... 13
4 Installation Instruction ........................................................................................ 14
4.1 Physical Dimension of the Outdoor Unit and Mounting Hole .................................. 14
4.2 Connection Pipe ..................................................................................................... 15
4.3 Installation of the Connection Pipe ......................................................................... 20
4.4 Air Purging and Refrigerant Charge ....................................................................... 25
4.5 Electric Wiring ........................................................................................................ 28
4.6 System Communication ......................................................................................... 30
4.7 Connection Method and Steps for System Communication .................................... 34
4.8 External Electrical Wiring Diagram ......................................................................... 39
5 Check Items after Installation and Trial Run ...................................................... 41
5.1 Check Items after Installation ................................................................................. 41
5.2 Trial Run ................................................................................................................ 41
6 Common Malfunction and Troubleshooting ....................................................... 54
7 Error Indication .................................................................................................. 55
8 Maintenance and Care ...................................................................................... 59
8.1 Outdoor Heat Exchanger ........................................................................................ 59
8.2 Drain Pipe .............................................................................................................. 59
8.3 Notice before Seasonal Use ................................................................................... 59
8.4 Maintenance after Seasonal Use ........................................................................... 60
8.5 Parts Replacement ................................................................................................. 60
9 After-sales Service ............................................................................................. 60
Copyright 2018. This translation is property of GREE PRODUCTS SL. All rights reserved. Total or partial reproduction without its express authorization is prohibited.

GMV DC Inverter VRF
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.
Follow this instruction to
complete the installation
work. Please carefully read
this manual before unit
startup and service.
Installation should be
conducted by dealer or
qualified personnel. Please
do not attempt to install the
unit by yourself. Improper
handling may result in water
leakage, electric shock or fire
disaster etc.
Before installation, please
check if the power supply is
in accordance with the
requirements specified on
the nameplate. And also
take care of the power
safety.
Make sure the unit can be
earthed properly and soundly
after plugging into the socket
so as to avoid electric shock.
Please do not connect the
ground wire to gas pipe,
water pipe, lightning rod or
telephone line.
Be sure to use the exclusive
accessory and part to
prevent the water leakage,
electric shock and fire
accidents.
If refrigerant leakage
happens during installation,
please ventilate immediately.
Poisonous gas will emerge if
the refrigerant gas meets fire.
Wire size of power cord
should be large enough.The
damaged power cord and
connection wire should be
replaced by exclusive cable.
After connecting the power
cord, please fix the electric
box cover properly in order to
avoid accident.
Copyright 2018. This translation is property of GREE PRODUCTS SL. All rights reserved. Total or partial reproduction without its express authorization is prohibited.

GMV DC Inverter VRF
2
Never fail to comply with the
nitrigen charge
requirements.Charge
nitrogen when welding
pipes.
Never short-circiut or cancel
the pressure switch to
prevent unit damage.
Please firstly connect the
wired controller before
energization, otherwise
wired controller can not be
used.
Before using the unit, please
check if the piping and wiring
are correct to avoid water
leakage, refrigerant leakage,
electric shock, or fire etc.
Do not insert fingers or
objects into air outlet/inlet
grille.
Open the door and window
and keep good ventilation in
the room to avoid oxygen
deficit when the gas/oil
supplied heating equipment
is used.
Never start up or shut off
the air conditioner by means
of directly plug or unplug the
power cord.
Turn off the unit after it runs
at least five minutes;
otherwise it will influence oil
return of the compressor.
Do not allow children
operate this unit.
Do not operate this unit with
wet hands.
Turn off the unit or cut off
the power supply before
cleaning the unit, otherwise
electric shock or injury may
happen.
Never spray or flush water
towards unit, otherwise
malfunction or electric shock
may happen.
Do not expose the unit to
the moist or corrosive
circumstances.
Electrify the unit 8 hours
before operation. Please
switch on for 8 hours before
operation. Do not cut off the
power when 24 hours
short-time halting (to protect
the compressor).
Copyright 2018. This translation is property of GREE PRODUCTS SL. All rights reserved. Total or partial reproduction without its express authorization is prohibited.

GMV DC Inverter VRF
3
Volatile liquid, such as
diluent or gas will damage
the unit appearance.Only
use soft cloth with a little
neutral detergent to clean
the outer casing of unit.
Under cooling mode, please
don't set the room
temperature too low and
keep the temperature
difference between indoor
and outdoor unit within 5.
If anything abnormal
happens (such as burning
smell), please power off the
unit and cut off the main
power supply, and then
immerdiately contact Gree
appointed service center.If
abnormality keeps going,
the unit might be damaged
and lead to electric shock or
fire.
User is not allowed to repair
the unit. Fault service may
cause electric shock or fire
accidents. Please contact
Gree appointed service
center for help.
GREE will not assume responsibility of personal injury or equipment damage caused by
improper installation and commission, unnecessary service and incapable of following the rules
and instructions listed in this manual.
DISPOSAL: Do not dispose this product as unsorted municipal waste. Collection of such
waste separately for special treatment is necessary.
Copyright 2018. This translation is property of GREE PRODUCTS SL. All rights reserved. Total or partial reproduction without its express authorization is prohibited.

GMV DC Inverter VRF
4
2 Product Introduction
Gree Multi VRF System adopts inverter compressor technology. According to change the
displacement of compressor, stepless capacity regulation within range of 10%-100% can be
realized. Various product lineup is provided with capacity range from 78.5kW to 90kW, which
can be widely used in working area and especially applicable to the place with variable load
change.Gree air conditioner is absolutely your best choice.
2.1 Names of Main Parts
Fig.1
NO.
①
②
③
④
⑤
Name
Fan, Motor
Electric Box
Assembly
Valve interface
Power cord
through-hole
Communication
code through-hole
2.2 Combinations of Indoor and Outdoor Units
(1) The following table indicates the number of IDU for ODU
ODU model
Max number of connectable IDU (unit)
GMV-785W/A-M
46
GMV-900W/A-M
53
Copyright 2018. This translation is property of GREE PRODUCTS SL. All rights reserved. Total or partial reproduction without its express authorization is prohibited.

GMV DC Inverter VRF
5
(2) The total capacity of indoor units should be within 50%~135% of that of outdoor units.
Fig.2
(3) Fig.2 is the combination view of the ODU of Modular DC Inverter Multi VRF System and
the IDU of Multi VRF System. IDU can be cassette type, one-way cassette type, wall-mounted
type, duct type, etc. When any one IDU receives operation signal, ODU will start to work
according to the capacity; when all IDUs stop, ODU will also stop.
2.3 The Range of Production Working Temperature
Cooling
Ambient temperature: -5°C ~52°C
Heating
Ambient temperature: -20°C ~24°C
When the indoor units are all VRF fresh air processor, the unit operating range is as
follows:
Cooling
Ambient temperature: 16°C~45°C
Heating
Ambient temperature: -7°C~16°C
Note：Out of the working Temperature Range may damage this product and will invalidate
the warranty.
Copyright 2018. This translation is property of GREE PRODUCTS SL. All rights reserved. Total or partial reproduction without its express authorization is prohibited.

GMV DC Inverter VRF
6
3 Preparation before Installation
Note: The picture is only used for reference and the actual product prevails. Unit: mm.
3.1 Standard Parts
Please use the following standard parts supplied by Gree.
Parts for Outdoor Unit
Number
Name
Picture
Quantity
Remarks
1
Owner's Manual
1
2
Wiring (match with
resistance)
1
3
Mark (Master )
2
Attach on the wired controller of
master IDU or on the front panel
3.2 Installation Site
Forbidden Items! It indicates that improper operation might lead to human casualty or
sever injury.
Items need to be followed. It indicates that improper operation might lead to personal
injury or property damage.
Install the unit at a place where
is adequate to withstand the
weight of the unit and make sure
the unit would not shake or fall
off.
Never expose the unit under
direct sunshine and
rainfall.Install the unit at a
place where is against dust,
typhoon and earthquake.
Try to keep the unit away from
combustible, inflammable and
corrosive gas or exhaust gas.
Leave some space for heat
exchanging and servicing so
as to guarantee unit normal
operation.
Keep the indoor and outdoor
units close to each other as
much as possible so as to
decrease the pipe length and
bends.
Never allow children to
approach to the unit and take
measures to prevent children
touching the unit.
Copyright 2018. This translation is property of GREE PRODUCTS SL. All rights reserved. Total or partial reproduction without its express authorization is prohibited.

GMV DC Inverter VRF
7
3.2.1 When the outdoor unit is totally surrounded by walls, please refer to following
figures for space dimension.
3.2.1.1 Space dimension for single outdoor unit
unit:mm
Fig. 3
Copyright 2018. This translation is property of GREE PRODUCTS SL. All rights reserved. Total or partial reproduction without its express authorization is prohibited.