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8
Diagnostics and data evaluation
8.1
Malfunction rectification
The solar inverter is provided with an automatic diagnostics system which independently identifies
certain faults and which can make them visible externally on the display.
Troubleshooting in the field
In principle, it is always worth attempting a reset by reinitialising the solar inverter whenever an error
message appears on the display.
To reset the device, proceed as follows:
1. Isolate the solar inverter from the mains (open automatic cutouts).
2. Switch off DC main switch.
3. Wait time: approx. 1 minute.
4. Switch DC main switch back on.
5. Switch in mains (close automatic cutouts).
(In the field, the first step is to scan for potential fault causes that could be picked up by the solar
inverter and result in tripping.)
Various key parameters can be scanned via the display, thereby enabling conclusions to be drawn
about potential fault causes.
Current values in the N menu
AC Voltage ->
Display of current output voltage ->
AC Frequency -> Display of current mains frequency -> Frequency limiting values
PV Voltage ->
Display of current PV cell voltage -> Switch-in threshold
8.2
Display messages
Display
LED Status
message
green: <on>
red: <on>
yellow: <on>
green: <off>
AC frequency
red: <off>
failure
yellow: <on>
green: <off>
AC voltage
red: <off>
failure
yellow: <on>
green: <off>
AC relay
red: <off>
failure
yellow: <on>
green: <flashes>
Calibration
red: <off>
ongoing
yellow: <off>
green: <off>
DC injection
red: <off>
failure
yellow: <on>
20
Cause
Display communication
-
faulty.
Mains frequency over-
shooting or undershooting
specified limit range.
Mains voltage overshoo-
ting or undershooting
specified limit range.
One of the anti-islanding
protection output relays is
faulty / defective.
Check of internal settings.
DC component of input-
side alternating current is
too high.
Voltage limiting values
Elimination
- If the fault persists after the device has
been reset, please inform your service
technician.
- Check the mains frequency via the
display in the N menu.
- Check the mains voltage via the display in
the N menu.
- If no voltage present, check mains auto-
matic cutouts.
- The solar inverter is defective.
- Return the device.
Normal function before input mode.
- If the fault persists after the device has
been reset, please inform your service
technician.
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