Sungrow SC3150UD-MV-US System Manual

96
Fault name
Triggering
condition
Recovery
condition
Corrective measures
2. HVRT is enabled,
and the grid voltage
is higher than the
corresponding
over-voltage value
of level 1~5 for
longer than the
LVRT required
duration. In off-grid
mode: Enable the
AC over-voltage
function only after
the output voltage
is stable. The
protection is as the
same as that of grid
connection.
duration. In
off-grid
mode: The
fault will be
automaticall-
y cleared
30s after
protective
shutdown.
3. If the fault is not caused by the
foregoing reasons and still exists,
please contact SUNGROW.
AC Under-
frequency
The grid voltage is
higher than 50% of
the rated voltage,
the grid frequency
is lower than the
corresponding
protection value of
level 1~5 for longer
than the under-
frequency
protection set
duration. In off-grid
mode: Enable the
AC under-
frequency function
only after the output
voltage is stable.
The protection is as
the same as that of
grid connection.
In grid-
connected
mode: The
frequency is
higher than
the under-
frequency
recovery
value for
longer than
the set grid
recovery
duration. In
off-grid
mode: The
fault will be
automaticall-
y cleared
30s after
protective
shutdown.
Generally, the machine will
reconnect to the grid when the grid
frequency returns to normal.
1. Measure the actual grid
frequency. If the grid voltage is
lower than the set value, please
contact the power company.
2. Check whether the app protection
parameters are correctly set.
3. If the fault is not caused by the
foregoing reasons and still exists,
please contact SUNGROW.
11 Troubleshooting System Manual

Sungrow SC3150UD-MV-US Specifications

General

Brand	Sungrow
Model	SC3150UD-MV-US
Category	Storage
Language	English