Gree HOME GMV [219/367] Debugging of cooling mode

Gree HOME GMV [219/367] Debugging of cooling mode
Dc Inverter VRF plus Water Heater Solution Service Manual INSTALLATION
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huge unit shall be laid by cable tray, both of which shall not be exposed to sunshine or rain.
a. Selection of Cable :
Type: rubber, PVC
Line Width: According to the length of the cable and its model, confirm the width of the cable.
b. Ground Wire of the Unit
The unit shall be reliably earthed for safety and earthing device can’t withstand mechanical pulling force.
Standard of ground wire width:
SSectional Area of Ground Wire D Sectional Area of Power Cord
S=D D<=16
S=D/2 D>16
15.1.4 Inspection of Communication System
Before debugging, check if the communication between indoor units and between indoor unit and outdoor unit
have been connected. Check if the address code of each indoor unit is the same as the assigned address.
The communication wire can’t in the same trunking with the power cord and it shall be independently laid by
flame-retarded hard PVC pipe. The horizontal spacing between communication wire and strong current wire shall
be more than 20cm.
Note: make sure that the unit has been energized for 8 hours or above before debugging or the compressor
will be damaged. The debugging shall be executed by or under guidance of the professional.
15.1.5 Inspection of Water System
1. Check if the piping of water system is proper
2. Check if the circulating pipes are insulated.
3. Check if the check valve and the protection valve of water inlet are installed correctly.
4. Check if the air inside the pipeline of water stystem has been drained. Check if the air outlet valve and blow
down valve are closed
5. The pressure of feeding water shall not be less than 0.15MPa
6. Check if the appearance of the unit and pipe system are damaged during transportation.
7. Check if all valves in system have been opened.
15.2 Debugging of Cooling Mode
Due to the characteristics of VRF unit, the debugging of the system shall distinguish the max. capcity of
indoor unit from min. indoor unit.
Before first startup of compressor, make sure that the unit has been energized and the compressor has been
preheated for 8 hours or above. When the unit has been energized, firstly confirm if the communication of the
system is normal , if the data of all indoor units and wired controllers can be viewed in monitoring software and if
there is any repeated code. If the communication is normal, record the data of sheet 1 and then, execute the
running of indoor unit with max. capacity. During this course, observe and judge if each parameter is normal. If not,
find the cause and solve the problem. Redebug it after the problem has been solved. If the running of system is
normal, record the parameter after 30min and execute the debugging of indoor unit with min. capacity
subsequently. The course can refer to that of min. capacity running.
The course can refer to that of min. capacity running.
Note: During the debugging, pay attention to the sound of outdoor fan and of running of the compressor.
15.3 Debugging of Heating Mode
If the environmental conditions are proper, heating mode can be turned to immediately after the debugging of
cooling mode has been finished. And also, the debugging shall distinguish the max. capcity of indoor unit from min.
indoor unit.
Note: If the environmental conditions can’t meet the requirements of cooling mode, the debugging of heating

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