Sungrow SG500MX Operation Manual page 22

5 Operation Mode
Startup
This is the transient process between the Initial Standby mode and the Run mode. Once the
Startup mode is complete, inverter will start powering the grid.
Run
In this mode, inverter converts the DC into AC and feeds it to the grid. Inverter tracks the PV
arrays' maximum power point (MPP) to maximum the output energy.
Standby
In Run mode, inverter will enter into the Standby mode if the DC side current is as low as 0A for
a while.
Inverter will continuously check if the PV array meets the grid-connection requirements. If the
inverter DC startup voltage and the startup time are reached, inverter will turn into the Run
mode.
Fault
If a fault occurs during operation, inverter will automatically enter into the Fault mode. LCD
panel will display the fault type with the "Fault" indicator on until the fault is removed and
inverter turns into the Run mode.
During this period, if you want to start the inverter manually, first confirm the stop clear
protection program from the LCD panel and then start the inverter.
If the fault is unrecoverable, inverter must be stopped to perform maintenance work. Inverter
will automatically check if the fault is recoverable.
When there is a DSP fault or module fault, restart of the inverter through the LCD is
strictly forbidden. A power-off check is required before reenergizing the inverter.
Otherwise, the inverter may be damaged.
Emergency-stop
Stop the inverter by turning the Start/Stop Switch to the "STOP" position or push the emergency
stop button when a fault or emergency occurs.
If the inverter is stopped by the Start/Stop Switch, restart the inverter by
Turning the Start/Stop switch to the START position.
Step 1
Perform Stop command from the LCD panel
Step 2
Step 3 Perform Start command from the LCD panel
Step 2 is to remove the emergency stop protection program. Device will not
respond if you push Start directly without removing the stop protection program.
If the inverter is stopped by pushing the emergency stop button, the AC switch will trip and the
inverter will disconnect from the grid. Restart the inverter by
Unlock the emergency stop button
Step 1
Turn the AC switch to the "OFF" position
Step 2
Turn the AC switch to the "ON" position
Step 3
The inverter will be restarted automatically when the grid-connected requirements are met on
both DC and AC side.
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Operation Manual