3. Troubleshooting
3.1. Troubleshooting
Note:
Remember that only trained and authorised personnel familiar with electrical systems and
safety issues may work on inverters and electrical installations.
In the following, the term 'Event' describes all events that prevent the inverter from operating
properly.
An event may occur anywhere in the installation (grid, PV module, cable and connections, inverter)
at any time. Not all events indicate an inverter error.
If the PV system does not supply power to the grid as expected, please go through the following
checklist:
1.
Check that the grid is connected properly to the inverter and that the grid is ready for
operation.
2.
Check that there is sufficient solar radiation to generate power.
3.
Check for shading and loose cables/connections in the PV system.
4.
Check the installation of the PV modules if the voltages of the PV modules is not within
the expected values.
5.
Check the event in menu B. If the red LED is flashing, this indicates a failure.
6.
If the above-mentioned points are OK, wait 15 minutes to find out whether there is a
permanent failure.
7.
If the PV system still does not supply any power to the grid, please check the voltage,
current and power of the PV module as well as voltage, current and power of the grid in
menu B.
8.
If the voltage values of the grid do not lie within the threshold values, please contact
your public utility for technical assistance.
3.1.1. Inverter Event Messages
Event: Mod.
U-GRID DCAC
The red LED will start flashing in case of an
inverter event. Please check the event in
menu B.
The event text is a short text describing the event. If the inverter reports an event ID number to
the display instead of a text, no event text has been predefined for that particular event ID num-
ber. This could be the case if the display software is older than the inverter software. Module
designation identifies the module that caused the event (DC1, DC2, DC3 or AC).
3. Troubleshooting
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