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

GREE Photovoltaic Multi VRF for North America
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PRODUCT

GREE Photovoltaic Multi VRF for North America
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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