43 Installation and Operating Instructions V04
7.3 Start-up
After finishing the electrical and mechanical checks, switch on the DC switch, then
check various settings in the display and make changes if necessary.
Ensure the correct safety setting has been selected for the region, then switch on the
AC circuit breaker.
When there is sufficient DC voltage applied and the gridconnection conditions are met,
the inverter will start to operate automatically.
Usually, there are three states during operation:
Waiting: When the initial DC voltage of the PV strings is greater than the minimum
DC input voltage but lower than the start-up DC input voltage, the inverter is waiting
for sufficient DC input voltage and cannot feed power into the grid.
Checking: When the initial voltage of the PV strings exceeds the start-up DC input
voltage, the inverter will check feeding conditions at once. If there is anything wrong
during checking, the inverter will switch to the ‛Fault“ mode.
Normal: After checking, the inverter will switch to ‛Normal“ state and feed power
into the grid.
During periods of low radiation, the inverter may continuously start up and shut
down. This is due to insufficient power generated by the PV generator.
If this fault occurs often, please call service.
Quick Troubleshooting
If the inverter is in "Fault" mode, refer to Section 11 "Troubleshooting".
