Sungrow SG33CX User Manual page 79

User Manual
Fault
Description
code
Grid undervoltage,
The grid voltage is
004
lower than the set
protection value
Grid low voltage,
The grid voltage is
005
lower than the set
protection value
AC instantaneous
overcurrent,
007 output
exceeds the upper
limit of the inverter.
Grid
overfrequency,
008 Grid
exceeds the upper
limit of the inverter.
Grid
underfrequency,
Grid frequency is
009
lower
lower limit of the
inverter.
Check method
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 lower than the
set value.
2. Check whether the protection parameters
are appropriately set via the APP or the LCD.
3. Check whether the AC cable is firmly in
place.
4. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
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 lower than the
set value.
2. Check whether the protection parameters
are appropriately set via the APP or the LCD.
3. Check whether the AC cable is firmly in
place.
4. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
Generally, the inverter will be reconnected to
AC
the grid after the grid returns to normal. If the
current
fault occurs repeatedly, contact Sungrow
Service.
Generally, the inverter will be reconnected to
the grid after the grid returns to normal. If the
frequency fault occurs repeatedly:
1. Measure the actual grid frequency, and
contact the local electric power company for
solutions if the grid frequency is beyond the
set range.
2. Check whether the protection parameters
are appropriately set via the APP or the LCD.
than the
3. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
9 Troubleshooting and Maintenance
69