10 Appendix I: LCD Operation User Manual
74
Tab. 10-1 State Descriptions
State Description
Running
After being energized, the inverter tracks the PV array’s maximum
power point (MPP) and runs with the combination of the energy
management system. This mode is the normal mode.
Maintain
The system is running normally, with the battery in maintenance
process. (Only for lead-acid battery)
Forced The system is running normally, with the EMS in forced mode.
Standby
The inverter waits for sufficient sunlight or battery level, then the
DC voltage recovers. The standby time can be set on the
Webserver. Refer to Chapter 11 for the introductions.
Key-stop
The inverter will stop running by manual “OFF” through the LCD
menu or with the DRM0 command from the DRED. Set to “ON” if
you want to restart the inverter.
Starting The inverter is initializing and synchronizing with the grid.
Upgrading The DSP or LCD software is in its upgrading process.
Fault
If a fault occurs, the inverter will automatically stop operation,
trigger the AC relay and show “Fault” on the LCD with the “FAULT”
indicator lit.
Once the fault is removed in recovery time, the inverter will
automatically resume running. The recovery time can be set on
the Webserver. Refer to Chapter 11 for the introductions.
Off-Grid
The system is disconnected from utility grid and runs as a
stand-alone system.
Upd-fail The master DSP program online upgrade failure.
If the device is in standby mode for more than 10 minutes, please check:
y Whether the insolation is sufficient and the PV connection is correct.
y Whether the battery level is sufficient and the cable connection is correct.
y If no anomaly is found, disconnect the DC switch and the main switch to
restart.
y If it still does not work, contact SUNGROW.
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