Installation and Operating Instructions V03
53
8.3 Start-Up
After finishing the electrical and mechanical checks, switch on the miniature
circuit-breaker and DC-switch in turn. Once the DC input voltage is sufficiently high and
the grid-connection conditions are met, the inverter will start operation automatically.
Usually, there are three states during operation:
Waiting: When the initial voltage of the 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 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 array.
If this fault occurs often, please call service.
Quick Troubleshooting
If the inverter is in "Fault" mode, refer to Section 11 "Troubleshooting".
