Gree GMV-Y36WL/A-T User manual

Photovoltaic Multi VRF for North
America
Capacity: 36 kBtu/h~60 kBtu/h
Rated Frequency: 60 Hz

CONTENTS
PRODUCT..................................................................................................................................................... 2
1 PRODUCT LIST................................................................................................................................................ 2
2 PRODUCT FEATURES................................................................................................................................... 2
3 SPECIFICATIONS............................................................................................................................................ 8
4 PRODUCT CAPACITY CORRECTION....................................................................................................... 10
5 PRINCIPAL OF OPERATION........................................................................................................................11
CONTROL................................................................................................................................................... 14
1 UNITS’ CONTROL.......................................................................................................................................... 14
2 WIRED CONTROLLER................................................................................................................................. 16
3 REMOTE CONTROLLER ............................................................................................................................. 22
4 MONITORING SOFTWARE.......................................................................................................................... 24
INSTALLATION...................................................................................................................................... 69
1 ENGINEERING INSTALLATION PREPARATION AND NOTICE........................................................... 69
2 INSTALLATION MATERIALS SELECTION............................................................................................... 71
3 INSTALLATION OF OUTDOOR UNIT........................................................................................................ 72
4 INSTALLATION OF ELECTRONIC EXPANSION VALVE ASSY (UNIT WITH EXTERNAL EXV).... 75
5 INSTALLATION OF REFRIGERANT PIPELINE....................................................................................... 75
6 INSTALLATION OF CONNECTION PIPE.................................................................................................. 79
7 ELECTRIC WIRING....................................................................................................................................... 86
8 DEBUGGING OF UNIT.................................................................................................................................. 88
MAINTENANCE..................................................................................................................................... 92
1 MALFUNCTION LIST.................................................................................................................................. 101
2 TROUBLESHOOTING................................................................................................................................. 107
3 POWER DISTRIBUTION OF UNIT.............................................................................................................117
4 REMOVAL OF PARTS..................................................................................................................................119
5 COMMON MAINTENANCE........................................................................................................................ 138
6 EXPLODED VIEW OF UNIT AND PARTS’ LIST..................................................................................... 142

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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)
c))
GMV-Y36WL/A-T(U)
CN870W
0210
11
(37500)
12.3
(42000)
208/240V
~
60Hz
R410A
GMV-Y48WL/A-T(U)
CN870W
0200
14.1
(48000)
15.8
(54000)
GMV-Y60WL/A-T(U)
CN870W
0190
15.8
(54000)
17.6
(60000))
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 is up
to 9.
（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
The maximum length of connection pipe is 300m (984ft) (in total) and the farthest

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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.
2.2 PV Direct-driven Inverter Multi VRF System
2.2.1 Working principle of PV Direct-driven Inverter Multi VRF System
PV power generation system is a power generation unit for PV direct-driven inverter
multi VRF system and provides clean and renewable energies for PV direct-driven
inverter multi VRF system. The left picture is the working principle chart of PV
direct-driven inverter multi VRF system combined with one single multi VRF system and
PV power generation system. As you can see, the sunlight irritates to the surface of the
PV sub-assy, according to the photovoltaic effect, solar energy will be converted to DC
electric power, then DC electric power shall be input to the DC bus of PV direct-driven
inverter multi VRF system. When there’s residual electric power or the compressor of
multi VRF unit is not operating, DC will be converted to AC electric through current
converter, meanwhile, conduct quality treatment to the electric energy, then combine the
qualified AC to the power grid. In case several multi VRF systems are operating, an AC
power distribution cabinet is needed to converge the AC, then combine them to the
power grid, as is shown in the right picture. When PV power generation capacity is
insufficient for the compressor of multi VRF system or PV is not generating power, the

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public power grid will supply electricity for the compressor of multi VRF system. The five
working modes can be switched seamlessly according to actual operation situation of
PV power generation system and multi VRF unit.
2.2.2 Five working modes of PV Direct-driven Inverter Multi VRF System
Take a PV direct-driven inverter ODU as an example to introduce the 5 working
modes of PV direct-driven inverter multi VRF unit.
2.2.2.1 Pure air conditioner working mode
Pure air conditioner working mode means that, when PV power generation system
is not generating power, national power grid will supply electricity to the main unit, as is
shown in the following picture, at this time, the system equals to a regular high-efficiency
permanent magnet synchronous inverter multi VRF unit.

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2.2.2.2 Pure PV power generation working mode
Pure PV power generation working mode means that, when the multi VRF system is
not working, the electric power distributed by the PV power generation system will be
supplied to the national power grid, as is shown in the following picture, at this time, the
multi VRF will provide the PV inverter function and the system equals to a regular PV
power station.

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2.2.2.3 PV air conditioner working mode
PV air conditioner working mode means that, when the power of PV power
generation equals to power consumption of multi VRF system, the distributed electric
energy of PV system will be applied to the operating working mode of multi VRF unit, as
is shown in the following picture, at this time, the PV power generation system can
realize self-sufficiency of electric power and “zero electricity consumption”.
2.2.2.4 PV air conditioner and system power generation working mode
PV air conditioner and system power generation working mode means that, when
the power of PV power generation is higher than the power consumption of multi VRF
system, the distributed electric energy of PV system will satisfy the operation of multi
VRF system preferentially, the surplus electric charge will be supplied to national power
grid, as is shown in the following picture:

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2.2.2.5 PV air conditioner and system power consumption working mode
PV air conditioner and system power consumption working mode means that, when
the power of PV power generation is lower than the power consumption of multi VRF
system, the distributed electric energy of PV system is insufficient to drive the normal
operation of multi VRF system, the national power grid shall supplement the electric
charge, as is shown in the following picture.

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2.2.3 PV system components
In PV direct-driven inverter multi VRF system, major PV system components
include PV sub-assy and more. Through cable connection, distribution and
transportation of electric energy is completed.
2.2.3.1 PV sub-assy
PV sub-assy is the core part of PV power generation system. By utilizing the
photovoltaic effect, the radiation of sunlight is converted to electric energy. These
electric energies can be used directly, combined to national power grid, or stored in
storage battery. In current market, the major PV sub-assy include monocrystaline silicon
sub-assy, polycrystalline silicon sub-assy and Thin film sub-assy. The following picture
is the appearance of these three sub-assys.
monocrystaline silicon sub-assy polycrystalline silicon sub-assy Thin film sub-assy
3 Specifications
3.1Outdoor Unit
Model
GMV-Y36WL/A-T(U)
GMV-Y48WL/A-T(U)
GMV-Y60WL/A-T(U)
Cooling capacity
kW
11
14.1
15.8
Btu/h
37500
48000
54000
Heating capacity
kW
12.3
15.8
17.6
Btu/h
42000
54000
60000
Circulating air volume
m3/h
6000
6300
6600
CFM
3531
3708
3884
Noise
dB(A)
62
62
62
Refrigerant charge
volume
Kg
3.3
3.3
3.3
oz
116
116
116
Power supply
208/240V～60Hz
208/240V～60Hz
208/240V～60Hz

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Model
GMV-Y36WL/A-T(U)
GMV-Y48WL/A-T(U)
GMV-Y60WL/A-T(U)
Rated power
input
Cooling
kW
2.8
3.8
4.6
Heating
kW
3.1
4.0
4.7
Unit Dimensions (WxDxH)
mm
900×340×1345
inch
35_7/16×13_3/8×53
Dimensions (WxDxH)
mm
998×458×1500
inch
39_5/16×18×59
Compressor
QXAS-F428zX050E
QXAS-F428zX050E
QXAS-F428zX050E
Water-proof level
IPX4
IPX4
IPX4
Suitable climite
T1
T1
T1
Connection
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
123
123
123
oz
4339
4339
4339
PV Input Voltage Range
120V~440V
Isc PV
15A/15A
Max.continuous input current
12.5A/12.5A
Max.PV input Power
6kW
MPPT voltage range
100V~380V
Rated AC Voltage
208Vac/240Vac
Operating Voltage Range
177~229Vac/204~265Vac
Operating Frequency Range
57~63Hz
Rated AC Power Output/Input
5kW/7kW
Maximum continuous AC Current
35A
Power factor(full load)
0.99
Max.THD(full load)
<3%
Cooling method
Air-cooled
Certifications
UL1741, IEEE1547.1
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.

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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 Correction factor of indoor and outdoor temperature
（1）
Correction factor of cooling capacity
（2）
Correction factor of heating capacity
4.1 Correction factor of pipe length and height difference
(1) 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) ;

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L: Length of one-way equivalent pipe
(2) 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
1.2 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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1.3 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
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

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2 Wired Controller
2.1 Control panel

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Button Graphics