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7. MODES OF OPERATION
There are 3 different modes of operation.
7.1
Normal mode
In this mode, Inverter works normally. Whenever the supplied power from PV panel is sufficient (voltage>150Vdc), Inverter
converts power to the grid as generated by the PV panel. If the power is insufficient(voltage<120Vdc), Inverter enters a “waiting”
state. Whilst “waiting” Inverter uses just enough power from the PV panel monitor internal system status. In normal mode the
LED is green.
7.2
Fault mode
The internal intelligent controller can continuously monitor and adjust the system status. If Inverter finds any unexpected
conditions such as grid problems or internal failure, it will display the information on its LCD and the LED will be red.
7.3
Shutdown mode
During periods of little or no sunlight, Inverter automatically stops running. In this mode, Inverter does not take any power
from the grid. The display and LED’s on the front panel do not work.
Notes:
Operating inverter is quite easy. During normal operation, Inverter runs automatically. However, to achieve maximum
conversion efficiency of Inverter, please read the following information:
Automatic ON-OFF: Inverter starts up automatically when DC-power from the PV panel is sufficient.
Once the PV-Inverter starts up, it enters one of the following 3 states:
1.
Standby: The PV string can only provide just enough voltage to minimum requirements of the controller.
2.
Waiting: When the PV string DC voltage is greater than 100V, Inverter enters “waiting” state and attempts to connect to the
grid.
3
. Normal operation: When PV string DC voltage is greater than 150V, Inverter operates in the normal state.
8. INVERTER STATUS
Inverter is designed to be user-friendly; therefore, the status of the Inverter can be easily understood by reading the
information shown on the front panel display. All possible messages are shown in the following table.