GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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All commissioning participants must take part in professional training courses before unit
commissioning. All participants can be grouped as required and each group should include at least
professional commissioning personnel and assistants.
3.3.1.3 Preparations of Commissioning Tools and Instruments
a. Make sure that the following tools or instruments are prepared before commissioning.
b. Make sure that the commissioning software is correct before commissioning.
c. The professional aftersales commissioning software provided by GREE should be used for
commissioning of GREE VRF system.
d. Make sure that all required files and parameter records are prepared.
3.3.2 Step 2: Pre-commissioning Check
3.3.2.1 Installation environment check
Installation environment check covers the heat exchange environment of unit and electromagnetic
radiant components. All requirements should comply with national and local electrical standards. For any
installation incompliance, records should be made for providing an analysis basis during refrigerating
system testing.
3.3.2.2 Installation Appearance Check
Installation appearance check covers whether pipeline installation complies with specifications,
whether refrigerant pipes and condensing drainage pipes are thermal insulated, and whether
Refrigerant pipes should be tidily installed, with outdoor and indoor disperse pipes leaning in the
required scope. For any installation incompliance, records should be made for providing an analysis
basis during refrigerating system testing.
Refrigerant pipes and condensing drainage pipes should not be exposed. If any pipe is exposed, an
immediate amendment is required to avoid serious loss.
3.3.2.3 Refrigerating System Check
1) Before commissioning, make sure that the stop valve of each module reaches the maximum
opening degree. Check whether there is any refrigerator oil leakage around the valve. If there is,
immediately check for leakage with soap bubbles or leak detectors. If confirming that leakage
exists, immediately stop commissioning and solve the problem before continuing commissioning.
2) Check system refrigerants before startup.
Before the system is started, connect the liquid-tube valve of ODU with a high pressure gauge and
