Gree GMV-36WL/A-T(U) User manual

DC INVERTER SIDE DISCHARGE VRF Ⅱ
FOR NORTH AMERICA

CONTENTS
PRODUCT..................................................................................................................................................... 2
1 PRODUCT LIST................................................................................................................................................ 2
2 PRODUCT FEATURES................................................................................................................................... 2
3 SPECIFICATIONS............................................................................................................................................ 3
4 PRODUCT CAPACITY CORRECTION......................................................................................................... 4
5 PRINCIPAL OF OPERATION......................................................................................................................... 6
CONTROL..................................................................................................................................................... 9
1 UNITS’ CONTROL............................................................................................................................................ 9
2 WIRED CONTROLLER................................................................................................................................. 12
3 REMOTE CONTROLLER ............................................................................................................................. 18
4 MONITORING SOFTWARE.......................................................................................................................... 20
INSTALLATION...................................................................................................................................... 65
1 ENGINEERING INSTALLATION PREPARATION AND NOTICE........................................................... 65
2 INSTALLATION MATERIALS SELECTION............................................................................................... 66
3 INSTALLATION OF OUTDOOR UNIT........................................................................................................ 68
4 INSTALLATION OF ELECTRONIC EXPANSION VALVE ASSY (UNIT WITH EXTERNAL EXV).... 71
5 INSTALLATION OF REFRIGERANT PIPELINE....................................................................................... 71
6 INSTALLATION OF CONNECTION PIPE.................................................................................................. 75
7 ELECTRIC WIRING ....................................................................................................................................... 83
8 DEBUGGING OF UNIT.................................................................................................................................. 85
MAINTENANCE..................................................................................................................................... 92
1 MALFUNCTION LIST .................................................................................................................................... 93
2 TROUBLESHOOTING................................................................................................................................... 95
3 POWER DISTRIBUTION OF UNIT............................................................................................................ 105
4 REMOVAL OF PARTS................................................................................................................................. 108
5 COMMON MAINTENANCE........................................................................................................................ 121
6 EXPLODED VIEW OF UNIT AND PARTS’ LIST..................................................................................... 126

DC Inverter Side Discharge VRF Ⅱfor North America
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PRODUCT

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PRODUCT
1 Product List
Model
Product
Code
Cooling
Capacity
Heating
Capacity
Power
Supply
Refrigerant
Appearance
Kw(Btu/h))
Kw(Btu/h
)
GMV-36WL/A-T(U)
CN850W
0230
11
(37500)
12.3
(42000)
208/230V
~
60Hz
R410A
GMV-48WL/A-T(U)
CN850W
0220
14.1
(48000)
15.8
(54000)
GMV-60WL/A-T(U)
CN850W
0270
17.6
(60000)
18.7
(64000))
2 Product Features
2.1 General introduction
Gree DC Inverter Multi VRF System II is the latest generation of DC inverter units.
One set of air-cooled outdoor unit can be connected with multiple direct evaporation
indoor units that are of the same or different forms and capacity. This refrigerating system
can directly provide air conditioning for one or more areas, and is applicable for residential
and light commercial uses. It features high energy efficiency, strong anti-interference
capability, long connectable pipe, wide operation range, good sound quality, intelligent
capacity regulation, complete protection, etc.
2.1.1 Features
（1）
Super high energy efficiency
The 2nd generation of DC Inverter Multi VRF System adopts DC motor to realize
complete direct current and upgrade the energy efficiency. SEER is up to 16; HSPF of
GMV-36WL/A-T(U) and GMV-48WL/A-T(U) is up to 9; HSPF of GMV-60WL/A-T(U) is up
to 8.2.
（2）
New generation CAN bus communication
Due to the latest communication method—CAN Bus Communication, system’s
anti-interference capability is stronger and the control on indoor units is more accurate,
with higher reliability. Specialized shield wire is no more needed and ordinary
communication wire can be applied in the construction, which has increased the
installation flexibility.
（3）
Long connection pipe

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The maximum length of connection pipe is 300m（984ft）(in total) and the farthest
connection pipe between indoor and outdoor units can be 120（394ft） m’s long, which has
extended the installation condition and reduced the limit of installation distance.
（4）
Wide operation range
Units can operate reliably in a wide temperature range (cooling: -5~48℃（23~118°F） ,
heating: -20~27℃（-4~81°F）)
（5）
Fine sound quality
Through a series of optimized measures, system has reduced the throttle noise and
oil return noise of indoor units, gas bypass noise, etc. so that units are more comfortable
regarding sound quality.
（6）
Intelligent PID capacity regulation
With the independently developed PID capacity regulation technology, units are able
to control the indoor ambient temperature more quickly and reduce the fluctuation of room
temperature.
（7）
Complete protection
Units are equipped with a series of protection to accurately identify errors and protect
the units, which has ensured reliable and safe operation.
3 Specifications
3.1Outdoor Unit
Model
GMV-36WL/A-T(U)
GMV-48WL/A-T(U)
GMV-60WL/A-T(U)
Cooling capacity
kW
11
14.1
17.6
Btu/h
37500
48000
60000
Heating capacity
kW
12.3
15.8
18.7
Btu/h
42000
54000
64000
Circulating air
volume
m3/h
6000
6300
7800
CFM
3532
3708
4601
Noise
dB(A
)
55
56
63
Refrigerant charge
volume
Kg
5
5
6.5
oz
176
176
229
Power supply
208/230V～60Hz
208/230V～60Hz
208/230V～60Hz
Rated
power
input
Coolin
g
kW
3.25
4.47
6.45
Heatin
g
kW
3.72
3.93
5.60
Unit Dimensions
(WxDxH)
mm
900×340×1345
940×320×1430
inch
35_7/16×13_3/8×53
37×12_9/16×56_1/4
Dimensions
mm
998×458×1515
1033×433×1580

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Model
GMV-36WL/A-T(U)
GMV-48WL/A-T(U)
GMV-60WL/A-T(U)
(WxDxH)
inch
39_5/16×18×59_5/8
40_5/8×17×62_3/16
Compressor
QXAS-F428zX050A
LNB53FCFMC
Water-proof level
IPX4
IPX4
IPX4
Suitable climite
T1
T1
T1
Connectio
n pipe
Gas
mm
Φ15.9
Φ15.9
Φ19.05
inch
Φ5/8
Φ5/8
Φ3/4
Liquid
mm
Φ9.52
Φ9.52
Φ9.52
inch
Φ3/8
Φ3/8
Φ3/8
Connection
Method
Bell mouth connection
Bell mouth connection
Bell mouth connection
Net weight
Kg
110
110
124
oz
3880
3880
4375
Note:
①Units conform to design standard: ARI 210/240.
②Specifications may be changed due to product improvement. Please refer to
nameplates of the units.
③Noise data are collected from a semi-anechoic room. Decibels may be slightly higher
in actual operation due to environmental change.
④Refrigerant charge volume listed in the table is based on the condition where indoor
and outdoor units are at a same level and with no connection pipe. Supplementary
refrigerant needs to be charged according to actual circumstance.
3.2 Operation range
Cooling
Outdoor temperature: -5~48℃(23~118°F)
Heating
Outdoor temperature: -20℃～27℃(-4~81°F)
4 Product Capacity Correction
4.1 Instruction of Product Capacity Correction
Nominal cooling capacity and nominal heating capacity are tested under given
conditions:
（1）
Rated cooling or heating condition
（2）
No height difference between indoor unit and outdoor unit
（3）
Short connection pipe
If the three conditions above have changed, the cooling and heating capacity will
change correspondingly and correction is needed.
4.2 Capacity Code
Instruction of capacity code
GMV-36WL/A-T(U) 、GMV-48WL/A-T(U) and GMV-60WL/A-T(U) are identical in

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components, systems and structure, etc. While the required capacity is set through the
capacity DIP switch.
Sheet of DIP Switch (5-bit DIP switch)
Model
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
GMV-36WL/A-T(U)
0
0
1
0
0
GMV-48WL/A-T(U)
0
0
1
0
1
GMV-60WL/A-T(U)
0
1
0
0
0
4.3Capacity Correction Formula
4.3.1Rated capacity of outdoor unit
Model
GMV-36WL/A-T(U)
GMV-48WL/A-T(U)
GMV-60WL/A-T(U)
Rated cooling
capacity
kW
11
14.1
17.6
Btu/h
37500
48000
60000
Rated heating
capacity
kW
12.3
15.8
18.7
Btu/h
42000
54000
64000
4.3.2 Correction factor of indoor and outdoor temperature
（1）
Correction factor of cooling capacity
（2）
Correction factor of heating capacity

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4.3.3 Correction factor of pipe length and height difference
Symbol description:
Hp：Height difference in case indoor unit is below outdoor unit（m/feet）;
Hm: Height difference in case indoor unit is above outdoor unit （m/feet）;
L: Length of one-way equivalent pipe
Below table shows the capacity variance ratio for 100% full load in standard working
condition (thermostat setting is 16℃(61℉) for cooling and 30℃(86℉) for heating).
Variance ratio of heating capacity
NOTE:
m
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
ft
0
33
66
98
131
164
197
230
262
295
328
361
394
427
459
492
5 Principal of Operation
Components in flowcharts are presented according to the following table:
Name
Compressor
4-way valve
Cut-off
valve
One-way valve
Capillary tube
Symbol
Name
Gas-liquid
separator
Pressure
switch
Pressure
sensor
Axial-flow finned heat
exchanger
Electronic expansion valve
Symbol

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In cooling, the low-temperature and low-pressure refrigerant gas from each indoor
heat exchanger will be merged and inhaled by the compressor and then become
high-temperature and high-pressure gas, which will later be discharged into outdoor heat
exchangers. By exchanging heat with outdoor air, refrigerant will turn to liquid and flow to
each indoor unit via Y-type branch or manifold. Pressure and temperature of the
refrigerant will then be lowered by throttle elements before it flows into indoor heat
exchangers. After exchanging heat with indoor air, refrigerant wil become low-temperature
and low-pressure gas again and repeat the circulation so as to realize the cooling effect.
In heating, 4-way valve will be energized to make refrigerant circulate in a reverse
direction of cooling. Refrigerant will release heat in indoor heat exchangers (electric
heating elements will also work under certain circumstance and release heat) and absorb
heat in outdoor heat exchangers circularly so as to realize the heating effect.

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CONTROL

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CONTROL
1 Units’ Control
1.1 Schematic diagram of units’ control
(1) Interpretation on the schematic diagram
1) High pressure switch is used to identify system’s high and low pressure. When
pressure is too high, the switch will break off and send a signal to main board.
Main board will pass this signal to controller, where the error will be displayed, and
stop unit from working.
2) High/low pressure sensor is used to test unit’s high/low pressure and send
real-time data to controller, which will control each unit’s output according to the
control logic.
3) Temperature sensors are used to test the tube temperature of the unit and send
data to the controller, which will control each unit’s output according to the control
logic.

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1.2 Operation Flow Chart
1.2.1 Operation Flow Chart of Indoor Unit
1) Cooling operation
2) Heating operation
3) Drying operation
4) Operation procedure is the same as that of cooling operation
5) Fan operation
6) The EXV of the indoor unit closes in fan mode, so that there is no refrigerant flow
in the refrigerant pipe of that indoor unit. But the fan of that indoor unit operates.

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1.2.2 Operation Flow Chart of Outdoor Unit
1) Cooling operation
2) Heating operation
1.3 Unit Control Functions
1.3.1Control functions of outdoor unit
1) Include the following contents.
2) Compressor capacity output.
3) Compressor start-up control.
4) Outdoor fan control.
5) Defrosting control.
6) Heating EXV control.
7) Subcooling valve control.
8) Refrigerant lacking control.
1.3.2Control functions of indoor unit
1) Include the following contents
2) Cool

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3) Dry
4) Heat
5) Fan
6) Heating temperature compensation
7) Anti-freezing
8) Air swing
9) Drainage pump
10) IDU EXV
11) Static pressure level
2 Wired Controller
2.1 Control panel

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DC Inverter Side Discharge VRF Ⅱfor North America
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Button Graphics

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2.2 Installation and removal
2.2.1 Installation dimensions
mm
112
22
2.7
3.3
5
42.5
40
82.5
inch
4.41
0.87
0.11
0.13
0.20
1.67
1.57
3.25
2.2.2 Installation method
Above is a simple installation method of wired controller. Please pay attention to the
following:
1) Before installation, disconnect power of the indoor unit. Do not operate when
power is connected.
2) Pull out the 2-core twisted pair cable from the installation hole on the wall and lead
it through the hole on the back plate of wired controller.

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3) Place the wired controller on wall and secure its back plate on wall with screw
M4X25.
4) Connect the 2-core twisted pair cable to terminal H1 and terminal H2. Tighten up
the screws.
5) Stick the cable in the slot that is left of the terminals and buckle the wired
controller’s panel with its back plate.
If caliber of the communication cord is too large, which causes difficulty in leading or sticking the cord
according to above point 2 and point 5, strip some of the sheath of the communication cable to meet the
installation requirement.
2.2.3 Removal method
Fig.2.1.3 Removal of Wired Controller
2.2.4 Connection of communication cord
There are 4 ways to connect wired controller with indoor units’ network:
Fig. 2.2.4.1 One wired controller Fig. 2.2.4.2 Two wired controllers
control one indoor unit controls one indoor unit

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Fig. 2.2.4.3 One wired controller controls multiple indoor units simultaneously.
Fig. 3.6Two wired controllers control multiple indoor units simultaneously.

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3 Remote Controller
(1) Remote controller YAP1F
Button name and function introduction
No.
Button name
Function
1
ON/OFF
Turn on or turn off the unit
2
TURBO
Set turbo function
3
MODE
Set operation mode
4
Set up&down swing status
5
I FEEL
Set I FEEL function
6
TEMP
Switch temperature displaying type on the unit’s display
7
Set health function and air function
8
LIGHT
Set light function