User Manual 9 Troubleshooting and Maintenance
71
10-minute grid
overvoltage, the
grid voltage
exceeds the preset
AC voltage of the
inverter for a long
time.
Wait for the inverter to return to normal.
If the fault occurs repeatedly, contact
Sungrow Service.
Grid overvoltage,
The grid voltage is
higher than the set
protection value
Generally, the inverter will be reconnected to
the grid after the grid returns to normal. If the
fault occurs repeatedly:
1. Measure the actual grid voltage, and
contact the local electric power company for
solutions if the grid voltage is higher than the
set value.
2. Check whether the protection parameters
are appropriately set via the APP or the LCD.
3. Check whether the cross-sectional area of
the AC cable meets the requirement.
4. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
Output overload,
The configured
module power is
excessively large
and out of the
normal operation
range of the
inverter.
Wait for the inverter to return to normal.
If the fault still exists, contact Sungrow
Service.
Grid voltage
unbalance, the
inverter detects
unbalanced
three-phase grid
voltage
Generally, the inverter will be reconnected to
the grid after the grid returns to normal. If the
fault occurs repeatedly:
1. Measure the actual grid voltage. If grid
phase voltages differ greatly, contact the
power company for solutions.
2. If the voltage difference between the three
phases is within the permissible range of the
local power company, modify the grid voltage
imbalance parameter through the APP or
LCD screen.
3. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
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