GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
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2 COMMISSIONING PROCESS
NOTICE
！
① It is forbidden to directly connect the compressor with power supply and forcibly power it on
during commissioning and maintenance.
② Engineering commissioning operations must be performed on the GMV5 serial unit. Otherwise,
the unit cannot properly run.
③ Before commissioning is completed, the main board of ODU displays "module address 0F A0"
and that of IDU displays ―A0‖.
④ A module must be set to master module and only one can be set during commissioning.
⑤ An IDU must be set to master IDU and only one can be set during commissioning.
⑥ Other functions can use the factory settings if there are not special engineering requirements.
2.1 NECESSITY OF VRF ENGINEERING COMMISSIONING
Different form ordinary air conditioning units, the VRF system raises high design requirements and
easily incurs operation-affected factors such as impurities and water during engineering installation. Due
to the requirements on engineering design/installation complexity and high-precise system control,
commissioning is mandatory after engineering installation. Only a qualified unit can be delivered for use.
2.2 REQUIRED FILES AND TOOLS FOR ENGINEERING COMMISSIONING
2.2.1 Required Tools for Engineering Commissioning of GREE VRF
System high and low pressure gauges for corresponding refrigerants
The GMV5 VRF provides two commissioning methods. One is to perform commissioning by
pressing buttons on the main board of ODU. The other is to perform commissioning on a PC through
professional software. Parameters of the ODU and IDU can be simultaneously displayed with the
second method. (For details about these methods, refer to respective instructions.)
2.2.2 Commissioning Files
The following commissioning files are required to record installation and commissioning of units:
pre-commissioning scheme determination meeting minutes, commissioning personnel record tables,
commissioning system appearance check record tables, commissioning data record tables, and
commissioning reports. See attached tables for file formats.
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