Trial Run - Gree GMV-Y96WM/A-F(U) Owner's Manual

Photovoltaic Multi VRF

5.2 Trial Run

NOTICE! During debugging, one and only one module must be set as a master module.
During debugging, one and only one IDU must be set as a master IDU.
When no special requirement is needed, no need to set other functions. Unit can operate
according to ex-factory settings. When special requirement is needed, please read the Service
Manual or Debugging and Maintenance Manual.
5.2.1 Preparation before trial run
(1) The power supply should be turned on only after finishing all the installation.
(2) All the control wires and cables are connected correctly and safely. Completely open
the gas and liquid valves.
(3) All the objects like metal filing, thrum and clip should be cleared after installation.
(4) Check if the unit appearance and piping system is damaged or not due to
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.
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