The starting conditions of the inverter:
(1) The DC switch of the inverter is in the ON state.
(2) The light is sufficient to meet the requirement that the DC input voltage is greater than the inverter start-up voltage and less than the maximum DC input voltage, and the total short-circuit current of the DC power is less than the maximum short-circuit current of the inverter.
(3) The power grid is operating normally, that is, the grid voltage and frequency are kept within a specific range.
What are the operating states of the inverter?
The inverter has five operating states: waiting, self-test, grid-connected power generation, fault and shutdown.
After the PV is powered on, the display will display "Waiting". If the PV system is normal and there is mains power, the display will display "Self-inspection 30S" later, and the machine will start self-inspection. If there is a problem with the photovoltaic system, the machine will report an error and prompt a "fault" message.
What will cause the inverter not to work?
Any of the following conditions will cause the inverter not to work:
(1) The DC switch is OFF.
(2) The light is weakened, so that the DC input does not meet the inverter start-up conditions.
(3) The anti-backflow device operates, and the AC side circuit breaker is disconnected, that is, the power grid is disconnected or lost.
(4) The inverter detects that the voltage or frequency of the power grid is abnormal, that is, it exceeds the working range required by the safety regulations.