Gree GMV6 VRF, Manual

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GMV6 DC Inverter VRF Units Technical Sales Guide
Leading torque control technology
It processes minimum current and maximum torue control technology
Utilize DC inverter compressor rotor magnetic resistance torque effectively, allowing the minimum
current to output the maximum torque, reducing motor winding loss and realizing higher efficiency.
Directly control the motor torque to realize ultra low speed operation of DC inverter fan motor, torque
pulsation is small, satisfying system demand while achieving comfort of higher requirement.
Quiet
Gree DC inverter multi VRF system fully considers comfort requirement, the humanized technology
upgrade the comfort perfectly. The wider operation range of the unit ensures normal operation under
severe cold or intense heat; quiet effect is better, creating a quiet working and living environment.
Quiet mode of ODU
Quiet at night
The system will memorize and judge the highest outdoor temperature. When the system is operating at
night in low load, it will enter quiet mode automatically. Based on actual application occasion, 9 kinds
of quiet mode can be set.
For example, it will enter night operation mode automatically after operating for 8h, then it enters
normal mode after 9h.
Compulsory quiet
When the unit is installed in the locations with lower noise requirement, quiet operation is necessary
no matter in the daytime or evening, at this time, you can have three kinds of compulsory quiet mode
setting to ensure that the unit is operated under low noise mode at any time. The lowest noise value is
as low as 40dB(A).
Intelligent silence
The unit can self-learn and customize user habits, and at the same time remember the user habits
characteristics. According to the user's usage characteristics and actual load matching, the output
capacity of the system can be determined automatically in the next 24 hours to achieve automatic silent
operation.
Quiet mode of IDU
IDU also adopts DC inverter motor to realize the electrodeless adjustment of speed regulation, reduce
noise value greatly, sets auto quiet mode for IDU through wired controller. Start auto quiet function
according to indoor temperature and people activity, the noise is as low as 22dB(A).
Leading technology ensures stable reliability
Gree DC inverter multi VRF system is famous in the industry with the advanced technology. After ten
years of research and experiment, the technology of DC inverter multi system is more mature. From
electrical component to mechanical assembly and control technology to communication technology,
Gree DC inverter multi VRF has been upgraded comprehensively. The continued technology innovation
will surely bring more reliable and efficient services for the user.
Oil return control technology
Gree has two exclusive oil return control technologies.
New generation of oil return control
Gree new generation of oil return control technology has implanted pressure control oil return
technology, through pressure control, it controls system oil return and oil storage status of each
compressor effectively, thus improving the service life of compressor greatly.
Exclusive oil storage technoloy of compressor
Gree DC inverter unit has exclusive compressor oil storage technology and it controls the minimum oil
level required when operating the compressor by judging the parameter.
Refrigerant storage and distribution technology
Adopt non-accumulator system circuit, reduce refrigerant charge drastically and improve system
refrigerant control precision, then store the surplus refrigerant in the pipe.