Gree GMV-Y72WM/C-F Owner's Manual page 55

Photovoltaic Direct-driven Inverter VRF
transportation.
(5) Check if the terminals of electrical element is loose and the phase sequence is correct
or not.
(6) Check the valve: For single-module unit, fully open the gas and liquid valve and close
oil balance valve; For dual/three module unit, fully open the gas, liquid valve and oil
balance valve.
5.2.2 Trial run
5.2.2.1 Notices
(1) Before test operation, make sure unit is power on and compressor has been preheated
for more than 8 hours. Touch the unit to check whether it's normally preheated. Start
test operation after unit is normally preheated, otherwise compressor might be
damaged. Debugging must be performed by professional technicians or under the
guide of professional technicians.
(2) When debugging starts, system will operate according to the ambient temperature.
1) When outdoor temperature is above 20ºC(68° F), debugging shall be in cooling
mode.
2) When outdoor temperature is below 20ºC(68° F), debugging shall be in heating
mode.
(3) Before debugging, confirm again whether the cut-off valve of each basic module is fully
turned on.
(4) During debugging, front panel of the outdoor unit must be fully closed; otherwise ,
debugging accuracy will be affected.
(5) Before debugging, make sure the needed amount of refrigerant has been added to the
pipe or at least 70% of the needed refrigerant has been added.
5.2.2.2 Description of each stage of debugging progress
Grid parameter configuration must be done before debugging (grid connection certification
standard setting, grid parameter configuration and setting of residual power sending to the grid);
otherwise, debugging is allowed. Detailed operation is as below:
Instruction:
①No setting is defaulted before ex-factory, which is 0 (except the setting of residual power
sending to the grid);
②After energization, if master controller hasn't detected no setting for the following
configuration, it will enter the setting interface of grid connection certification directly.
qP Flicker
qU Flicker
qn Flicker
After the photovoltaic unit enters the function, qp is defaulted.
00 Flicker 00 Flicker
00 Flicker 00 Flicker
00 Flicker 00 Flicker
51
Grid connection certification
standard setting
Grid parameter configuration
Setting of residual power
sending to the grid