Gree GMV5 Series User manual

GMV5Compact Series
R410A Systems―Outdoor Unit
Owner's Manual
Air Conditioners
GMV-224WL/A-X
GMV-250WL/A-X
Thank you for choosing Gree air conditioners, please read this owner’s manual carefully before
operation and keep it for future reference.
GMV-280WL/A-X

Preface
Gree GMV5 Compact Series VRF System, with the most advanced technologies in the world, uses
eco-friendly refrigerant R410A as its cooling medium. For correct installation and operation, please read this
manual carefully. Before reading the manual, please note that:
(1) For safety operation, please strictly follow the instructions in this manual.
(2) During operation, the gross rated capacity of working IDU should be within the gross rated capacity of
ODU. Otherwise, IDU’s cooling / heating performance will be reduced.
(3) This manual must be in the hands of direct operators or maintenance men.
(4) In case of malfunction and operation failure, please examine the following items and contact our
appointed service centers as soon as possible.
1) Nameplate (model, cooling capacity, product code, ex-factory date).
2) Malfunction status (detail description of conditions before and after malfunction occurs)
(5) All units have been strictly tested and proved to be qualified before ex-factory. To avoid unit damage or
even operation failure which may be caused by improper disassembly, please do not disassemble units by
yourself. If disassembly is needed, please contact our appointed serve centers for help.
(6) All graphics and information in this manual are only for reference. Manufacturer reserves the right for
changes in terms of sales or production at any time and without prior notice.
The appliance shall not be installed in the laundry. This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental capabilities, or experience and knowledge, unless they have
been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
DISPOSAL: Do not dispose this product as unsorted municipal waste. Collection of such waste separately for
special treatment is necessary.

Contents
1 Safety Instruction ................................................................................................................................. 1
2 General Introduction ............................................................................................................................ 3
2.1 Outdoor Unit and Indoor Unit Combination ............................................................................................3
2.2 Operating Range..................................................................................................................................3
3 Before Installation................................................................................................................................ 4
3.1 Standard Accessories............................................................................................................................4
3.2 Installation Location ............................................................................................................................4
4 Installation Instruction.......................................................................................................................... 6
4.1 Physical Dimension of the Outdoor Unit and Mounting Hole ....................................................................6
4.2 Piping Design .....................................................................................................................................9
4.3 Oil Return Trap Installation.................................................................................................................12
4.4 Installation of the Connection Pipe.......................................................................................................13
4.5 Pressure Check, Vacuum and Additional Refrigerant Charge ...................................................................17
4.6 Electric Wiring..................................................................................................................................19
4.7 Communication Wiring ......................................................................................................................22
5 Check Items after Installation and Trial Run ..................................................................................... 25
5.1 Check Items after Installation ..............................................................................................................25
5.2 Trial Run ..........................................................................................................................................25
6 Common Malfunction and Troubleshooting ...................................................................................... 27
6.1 Check before Contacting Service Center...............................................................................................27
6.2 Normal Phenomenon..........................................................................................................................28
6.3 Error Display ....................................................................................................................................28
7 Maintenance ....................................................................................................................................... 31
7.1 Outdoor Heat Exchanger ....................................................................................................................31
7.2 Drain Pipe ........................................................................................................................................31
7.3 Check before the Seasonal Use............................................................................................................31
7.4 Maintenance after the Seasonal Use .....................................................................................................31
7.5 Parts Replacement.............................................................................................................................32
8 After-sales Service.............................................................................................................................. 33

GMV5 Compact Series VRF Outdoor Unit
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1 Safety Instruction
Follow this instruction to complete
the installation work. Please
carefully read this manual before
unit startup and service.
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 safely.
Be sure to use the exclusive
accessory and part to prevent the
water leakage, electric shock and
fire accidents.
Wire size of power cord should be
large enough. The damaged power
cord and connection wire should be
replaced by exclusive cable.
Never fail to comply with the
nitrogen charge requirements.
Charge nitrogen when welding
pipes.
Please firstly connect the wired
controller before energization,
otherwise wired controller can not
be used.
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.
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.
If refrigerant leakage happens
during installation, please
immediately ventilate. Poisonous
gas will emerge if the refrigerant
gas meets fire.
After connecting the powercord,
please fix the electric box cover
properly in order to avoid accident.
Never short-circuit or cancel the
pressure switch to prevent unit
damage.
Before using the unit, please check
if the piping and wiring are correct
to avoid water leakage, refrigerant
leakage, electric shock, or fire etc.
refers to things that are not allowed. Incorrect operation may cause personal injury or death.
refers to things that must be allowed. Incorrect operation may cause personal injury or death.

GMV5 Compact Series VRF Outdoor Unit
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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.
Do not insert fingers or objects
into air outlet/inlet grille.
Open the door andwindow and
keep good ventilation in the room
to avoid oxygen deficit when the
gas/oil supplied heating equipment
is used.
Never start up orshut off the
air condition 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.
Volatile liquid, such as diluents
or gas will damage the unit
appearance. Only use softcloth
with a little neutral detergent to
clean the outer casing of unit.
If anything abnormal happens
(such as burning smell), please
power off the unit and cut off the
main power supply, and then
contact Gree appointed service
center. If abnormality keeps
going, the unit might be damaged
and lead to electric shock or fire.
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).
Under cooling mode, please don’t
set the room temperature too low
and keep the temperature
difference between indoor and
outdoor unit within 5℃.
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.

GMV5 Compact Series VRF Outdoor Unit
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2 General Introduction
GREE GMV5 Compact series All DC Inverter VRF outdoor units are based on GREE DC Inverter compressor
technology and special designed for the residential apartments, commercial offices and super markets. And the
capacity range of GMV5 Compact series outdoor units is 22.4 kW, 25 kW, and 28 kW.
2.1 Outdoor Unit and Indoor Unit Combination
（1）One outdoor unit can be connected to the maximum 16 indoor units.
（2）The total capacity of indoor units should be in the range of 50%~135% of the capacity of outdoor unit.
Fig.1 Outdoor unit and indoor unit combination
（3）As shown in Fig.1, the outdoor unit can be connected to different type of indoor units including 4-way
Cassette IDU, 1-Way Cassette IDU, Wall Type IDU and Duct Type IDU. If one indoor unit is turned on, the
outdoor unit will start and deliver the required cooling capacity to the indoor unit. If all the indoor units are turned
off, the outdoor unit will be stopped.
2.2 Operating Range
Cooling operation
Ambient temperature:10℃~52℃
Heating operation
Ambient temperature:-20℃~27℃
IDU
ODU
4-Way Cassette
1-Way Cassette IDU
Wall Type IDU
Duct Type IDU

GMV5 Compact Series VRF Outdoor Unit
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3 Before Installation
Remarks: the pictures are for reference only, and the all the unit is in “mm”.
3.1 StandardAccessories
Please use the below standard accessories as per the instruction
Accessories for outdoor unit
S/N
Name
Appearance
Qty
Remarks
1
User Manual
1
2
Flexible Pipe
1
3
Resistance
1
This resistance should be connected
to the last indoor unit
3.2 Installation Location
3.2.1 Choose the Location for Installation of Indoor Unit
（1）Keep the indoor unit away from sunshine.
（2）The ceiling and suspender should be strong enough to support the indoor unit.
（3）Please choose the location.
（4）Please keep the air outlet and air inlet away from the barriers.
（5）The location for installation should be easy for piping.
（6）Please keep the indoor units away from incendive materials and explosive materials.
（7）Please keep the indoor units away from the location with high humidity and high corrosive
3.2.2 Choose the Location for Installation of Outdoor Unit
（1）The outdoor units should be installed on the solidity foundation
（2）The outdoor units should be installed near to indoor units as much as possible and the length of piping
The installation should follow the local safety regulation.
Please contactwith our local agent or dealers to install the unit.
Don’t turn on the power until finishing the installation.

GMV5 Compact Series VRF Outdoor Unit
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should be less as much as possible to ensure the performance.
（3）Don’t install the outdoor units under the window or between buildings to avoid the noise problem.
（4）Please keep the outdoor units from the direct sunshine and drench
（5）Please keep the air outlet and air inlet away from the barriers.
（6）Please install the outdoor units in the location which has good ventilation.
（7）Please keep the indoor units away from the location with high humidity and high corrosive
Caution!
If the unit was installed on the following improper sites leading to malfunction, please contact Gree appointed
service center for help.
①the place full of oil; ②Salina; ③the place including of H2S;
④the place with high frequency device (such as wireless device, electric welding device, iatric device);
⑤special places.
Don’t install duct on the ventilation fan of the outdoor.
The waterproofcover should not affect the ventilation of the outdoor unit fan.

GMV5 Compact Series VRF Outdoor Unit
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4 Installation Instruction
Note: The picture is only used for reference and the actual product prevails. Unit: mm.
Please observe the following installation principle to insure the operating unit is perfect:
☆Amuch space should be enough to make sure the inlet and outlet air from outdoor unit will not regurgitate and
maintain outdoor unit;
☆Good ventilation is needed for outdoor unit;
☆Install the unit at a place where is adequate to withstand the weight of the unit and is insulated against all noise,
which makes sure the noise doesn’t disturb the neighbors;
☆Only use the appointed suspender orifice to suspend outdoor unit. Please protect the unit when suspending it,
and forbid destroying sheet metal in case of rustiness;
☆Never expose the unit under direct sunshine;
☆Rain water and thaw water should be discharged in time;
☆The place must insure outdoor unit will not be under the influence of snow, rubbish, oil smear;
☆Rubber or spring absorber should be installed on the outdoor unit to meet the standard of noise and vibration;
☆Installation dimension should observe the installation instruction, and outdoor unit must be fixed on the
installing place;
☆Please call Gree appointed professional people to install units.
4.1 Physical Dimensionof the OutdoorUnit and Mounting Hole
1) Outdoor unit physical dimension
Fig.2 Outdoor unit physical dimension

GMV5 Compact Series VRF Outdoor Unit
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Model
A
B
C
GMV-224WL/A-X
1098
427
1584
GMV-250WL/A-X
1098
427
1584
GMV-280WL/A-X
1098
427
1584
2) Mounting hole physical dimension
Fig.3 Mounting hole physical dimension
3）Use M12 bolt to fix up the chassis of the units when installing units.
4）Aspace is needed to install outdoor unit to insure unit operate normally.
ⅰObstructions in the air inlet
No obstructions above the unit
Obstructions above the unit

GMV5 Compact Series VRF Outdoor Unit
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ii Obstructions in the air outlet
Fig.4 Installation space for outdoor unit
Note：
⑴Be sure that Lis less than H, and H is the height of the unit and its chassis;
⑵The value of Amust meet the following standard:
L
A
0 < L< 1/2H
≥600
1/2H < L< H
≥1400
5）Outdoor unit should be installed on the beton chassis of 10cm thickness.

GMV5 Compact Series VRF Outdoor Unit
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4.2 Piping Design
4.2.1 The Branch of the Connection Pipe
The connection pipe between indoor unit and outdoor unit uses “Y”type branch, as shown in Fig.5.
线控器
室内机
Y型分歧管
室外机
Fig.5 Schematic diagram of piping connection
4.2.2 Allowable Pipe Length and Drop Height among Indoor and Outdoor Units
Fig.6 Allowable pipe length and drop height among indoor and outdoor units
The equivalent distance of indoor units manifold is 0.5m.
Wired controller
Height difference between outdoor and indoor unit: H
Y-type manifold
Indoor unit
Height difference among indoor units:
h<=15m
Outdoor unit
ODU
IDU
The first
manifold
of indoor
units
IDU
Length of farthest fitting pipe: L≤120m

GMV5 Compact Series VRF Outdoor Unit
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GMV-224WL/A-X、GMV-250WL/A-X、
GMV-280WL/A-X
Allowable Value
Fitting Pipe
Total length (actual length) of fitting pipe
250m
L1+L2+L3+…+L9+a+b+…j
Length of farthest fitting pipe
(m)
Actual length
100m
L1+L6+L7+L8+L9+j
Equivalent length
120m
Equivalent length from the first manifold to the furthest
pipe
40m
L6+L7+L7+L8+L9+i
Height difference between
outdoor unit and indoor unit
Outdoor unit at upper
50m
——
Outdoor unit at lower
40m
——
Height difference between indoor units
15m
——
Maximum length of main pipe (1)
90m
L1
4.2.3 Indoor Unit Capacity Code
Energy rank
capacity code
Energy rank
Capacity code
Energy rank
Capacity code
Indoor unit
22 model
22
25 model
25
28 model
28
32 model
32
36 model
36
40 model
40
45 model
45
50 model
50
56 model
56
63 model
63
71 model
71
Outdoor unit
224 model
224
250 model
250
280 model
280
☆The maximum number of indoor units is 16 with one outdoor unit;
☆The total capacity code of indoor unit is in the range of 50% t~ 135% of that of outdoor unit.
4.2.4 Connection Pipe Size
（1）Pipe size between outdoor unit and the first manifold is determined by that of outdoor unit.
Pipe size between outdoor unit and the first manifold:
Outdoor unit model
Fitting pipe between outdoor unit and the first manifold
Gas pipe (mm)
Liquid pipe(mm)
GMV-224WL/A-X
Ф22.2
Ф9.52
GMV-250WL/A-X
Ф22.2
Ф9.52
GMV-280WL/A-X
Ф22.2
Ф9.52
Note:
①When the maximum length between outdoor unit and the first manifold exceeds or equals to 90m , the sizes
of gas pipe and liquid pipe of the main pipe are changed according to the following table.

GMV5 Compact Series VRF Outdoor Unit
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If L≥90m and H≥15m, then :
②When the distance between indoor unit and its nearest manifold exceeds 10m, the liquid pipe size of the
indoor unit whose rated capacity is less than or equal to 5.0KW should be 2 times bigger than before.
（2）Fitting pipe size between Manifolds at indoor unit side is determined by the total capacity of downstream
indoor unit(s).
室内机
室外机 室内分歧管间的配管
Total capacity of downstream indoor unit(s)
X（kW）
Fitting pipe size between Manifolds at indoor unit side
Gas pipe（mm）
Liquid pipe（mm）
ODU
IDU
Fitting pipe between Manifolds

GMV5 Compact Series VRF Outdoor Unit
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X≤5.6
Φ12.7
Φ6.35
5.6＜X≤14.2
Φ15.9
Φ9.52
14.2＜X≤22.0
Φ19.05
Φ9.52
22.0＜X≤30.0
Φ22.2
Φ9.52
（3）Manifold should be matched with the fitting pipe of indoor units.（If the distance from the first manifold to a
indoor unit exceeds 30m, then double the gas pipe size between them）
室内机 室内分歧管至
室内机的配管
室外机 室内分歧管
Indoor unit energy rank
Gas pipe
Liquid pipe
22、25、28 model
Ф9.52
Ф6.35
32、36、40、45、50 model
Ф12.7
Ф6.35
56、63、71、80、90、100、112、125、140 model
Ф15.9
Ф9.52
4.3 OilReturn Trap Installation
4.3.1 Objective of Setting Oil Loop
When large drop height exists in the system, oil loop is required to be set on the vertical pipeline so as to
guarantee effective oil return to compressor.
4.3.2 Principle of Setting Oil Loop
When large drop height exists between indoor and outdoor units, oil loop is required to be set on the vertical
pipeline for every X m from the top down.
Oil loop can be made by two U-type bends or one return-type bend. Pipe height is 3-5 times of pipe sizes.
(Note: X is determined by the location of indoor and outdoor units, if outdoor unit is upper, then X is 6m, otherwise
X is 10m.)
4.3.3 Precautions for Oil Loop Installation
(1) Oil loop can be set as U-type or O-type;
(2) When the outdoor unit is at lower position, oil loop is required to be set on the vertical pipeline for every 10m
Fitting pipe from indoor
unit to the manifold
IDU
Indoor units manifold
ODU

GMV5 Compact Series VRF Outdoor Unit
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from the down top. And also set oil loop at the lowest and highest position;
(3) When the outdoor unit is at higher position, oil loop is required to be set on the vertical pipeline for every 10m
from the down top. And also set oil loop and one-way trap at the lowest and highest position.
4.3.4 Oil Loop and One-way Trap
Fig.7 Oil loop Fig.8 One-way trap
In case of not damaging the pipe, please check the following table for size of oil loop and one-way trap.
A
R
C
mm
inch
mm
mm
Φ19.05
3/4
≥34
≤105
Φ22.2
7/8
≥31
≤150
Φ25.4
1/1
≥45
≤150
Φ28.6
9/8
≥45
≤150
Φ34.9
11/8
≥60
≤250
Φ38.1
12/8
≥60
≤350
Φ41.3
13/8
≥80
≤450
Φ44.45
7/4
≥80
≤500
Φ54.1
17/8
≥90
≤500
4.4 Installation of the ConnectionPipe
4.4.1 Precautions When Installing the Connection Pipe
(1) Conform to the following principles during piping connection: Connection pipeline should be as short as
possible. The height difference between indoor and outdoor units should be as short as possible. Keep number
of bends as little as possible. The radius of curvature should be as large as possible.
(2) Weld the connection pipes between indoor and outdoor units. Please strictly conform to the requirements for
welding process. Rosin joints and pin holes are not allowable.
(3) When laying the pipes, be careful not to deform them. The radius of bending parts should be more than

GMV5 Compact Series VRF Outdoor Unit
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200mm. the pipes cannot be repeatedly bent or stretched; otherwise the material will get harden. Do not bend
or stretch the pipe over three times at the same position.
(4) Please use a torque wrench to connect union nut on the indoor unit. See Fig.9.
Fig.9 Installation of fitting pipe
1) Align the expansion end of copper pipe with the center of threaded joint. Tighten the flare nuts with your
hands;
2) Tighten the flare nuts with torque wrench until you hear “click”sound;
3) Use sponge to wrap the connecting pipe and joints without thermal insulation and tie it up with plastic
tape;
4) Amounting support for the connection pipe is required;
5) The curvature degree of connection pipe should not be small, otherwise the pipe might crack. Installation
personnel should use tube benderwhen bending the pipe;
6) Don’t forcibly stretch the pipe joint, otherwise indoor capillary or other pipes might be damaged and lead
to refrigerant leakage.
4.4.2 Y-type Manifold
（1）Y-type manifold
到其它分支管
或到室内机
现场用管
室外
现场用管
口2
进口
出口1
Y型分歧管
Fig.10 Y-type manifold
(2) Y-type manifold has several pipe sections with different pipe size, which facilitates to match with various
copper pipes. Use pipe cutter tocut in the middle of the pipe section with different pipe size and deburr as well.
See Fig.11.
Torque spanner
Spanner
Outdoor unit
Inlet
Field supplied pipe Outlet 1
Outlet 2
Y-type manifold
Field supplied pipe
To the connection
pipe or indoor unit

GMV5 Compact Series VRF Outdoor Unit
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从中间切开
Fig.11 Cut manifold
(3) Y-type manifold must be installed vertically or horizontally.
A向示图
A
B向示图
B
±30°以内
±30°以内
Fig.12 Installation of manifold
Select Y-type manifold:
R410A
Total capacity of downstream indoor
units X（KW）
Model
Y-type manifold
（2 branches）
X≤20
FQ01A
20<X≤30
FQ01B
30<X≤70
FQ02
70<X≤135
FQ03
135<X
FQ04
(4) Thermal insulation for manifold
For gas pipe side manifold is isolated by insulating material that can bear 120℃or higher temperature, and the
foam attached on the manifold cannot be taken as insulating material. For liquid pipe side the foam attached on
the manifold and the field insulating material should be in touch in case of dropping dew.
4.4.3 Thermal Insulation for Pipeline
(1) For multi-VRF system, every copper pipe should be labeled so as to avoid misconnection;
(2) At the manifold inlet, at least leave 500mm straight pipe section, and for FQ04 manifold, keep it at least
800mm;
(3) Every 6m drop height between indoor and outdoor units, one oil loop should be set on gas pipe so as to keep
normal oil return;
(4) Thermal insulation for pipeline.
1) To avoid condensate or water leakage on connecting pipe, gas pipe and liquid pipe must be wrapped with
Cut in the middle
Within ±30°
Within ±30°
Seeing from direction A
Seeing from direction B