SMA Solar Technology AG
4 Service
Installation Manual
STP60-JP-10-IA-en-11
25
Figure 4.1 Grid-related events
34–37
The residual-current monitoring
unit (RCMU) detected an
overcurrent.
Turn off both DC and AC supply
and wait until the display turns off.
Then turn on DC and AC supply
and observe if the event reoccurs.
Visual inspection of all PV cables
and modules.
-
x
-
40
Utility grid
not OK.
The utility grid has been
outside the permissible range
for more than ten minutes
(frequency and/or voltage).
Check grid frequency, grid voltage,
software version and grid code
setting.
x
-
-
41–43
Fault ride through. The inverter
has detected that the grid
voltage was below or above a
certain level.
If this event is reported several times
each day, perform onsite grid
analysis.
48, 51
Grid frequency too low or too
high.
Check grid frequency and AC
installation.
x
-
-
54–56
DC current share in utility grid
is too high (stage 2).
For repeated daily occurrences,
perform onsite grid analysis.
x
-
-
61
Grid failure, open phase
detected.
If the event reoccurs several times
each day, contact the responsible
grid operator.
x
-
-
62
Grid failure.
If the event reoccurs several times
each day, contact the responsible
grid operator.
x
-
-
64-81
Grid voltage on phase too low. Check voltage and AC installation.
If the voltage is zero, check the
fuses.
x
-
-
ID
Status
message
Description
Measure
DNO SMA
Service
Line
PV
