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DC Inverter Multi
VRF Service Manual
ENGINEERING DEBUGGING
1 NECESSITY OF ENGINEERING DEBUGGING FOR VRF UNITS
Different from common units, VRF units has high requirements of design. And also, during engineering installation,
the factors which can affect the normal running of the system easily occur, such as impurity and water. Due to complexity
of design and installation as well as requirements of high accuracy of system control, debugging must be conducted after
nish of the engineering installation. The units can be used after the debugging passes.
2 ILES AND TOOLS FOR ENGINEERING DEBUGGING
2�1 Tools
Inner hexagon Spanner Digital Display Thermometer
Monkey wrench Sound meter
Phillips screwdriver Split-core type meter
Slotted screwdriver Digital multimeter
Vacuum Pump Ammeter
Electric Scale Calculagraph
Pressure Gage Standing ladder
Anemoscope
Gree portable debugger (CE40-24/E), or
debugging software and data wire
There are two kinds of debugger for Gree VRF units. One is portable debugger and the other is the computer with
exclusive software. Both of them are exlusive and shall be applied to manufacturer.
Note: the model of Gree portable debugger is CE40-24/E
Both two kinds of debuggers can inspect and debug the required parameters. The only difference between them is
that the portable debugger can’t display parameters of all indoor units and storage or display history data while the PC with
exclusive software can do such things. (Please refer to corresponding instruction for specic operation methods).
2�2 Debugging Files
In order to record the events of installation and debugging for the unit, make sure that the following files are
complete: Conrmed plan for debugging, cahier, personnel for debugging, appearance inspection record of the system,
debugging data record, debugging report, etc. The reference form sets forth in attached list.
3 STEPS OF ENGINEERING DEBUGGING
3�1 Preparation before Debugging
3.1.1 Integral Debugging Plan
Before debugging, acquire information of debugging scheduling, total workload of debugging, factors which may
affect the debugging, required human and material resources. Related responsible person shall make the debugging plan.
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