62
09 Maintenance
User Manual
V1.0-2023-10-30
No�
Fault
Cause
Solutions
5
Grid 10min
Overvoltage
The moving average
of grid voltage in
10min exceeds
the range of safety
requirements.
1. If the problem occurs occasionally, the
utility grid may be abnormal temporarily.
The inverter will recover automatically after
detecting that the utility grid is normal.
2. If the problem occurs frequently, check
whether the grid voltage is within the allowed
range.
• Contact the local power company if the
grid voltage exceeds the permissible
range.
•
Modify the grid overvoltage rapid
protection threshold after obtaining the
consent of the local power company if
the grid voltage is within the permissible
range.
6
Grid
Overfrequency
Utility grid exception.
The actual grid
frequency exceeds
the requirement
of the local grid
standard.
1. If the problem occurs occasionally, the
utility grid may be abnormal temporarily.
The inverter will recover automatically after
detecting that the utility grid is normal.
2. If the problem occurs frequently, check
whether the grid frequency is within the
permissible range.
• Contact the local power company if the
grid frequency exceeds the permissible
range.
•
Modify the overfrequency protection
threshold or disable the overfrequency
protection function after obtaining the
consent of the local power company if the
grid frequency is within the permissible
range.
