Sungrow SG125HV-30, User Manual

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8 Troubleshooting and
Maintenance
8.1 Troubleshooting
Once a fault occurs in the inverter, the fault information can be displayed on the
APP interface or the LCD.
Fault codes and check methods are as follows:
Fault
code
Description Check method
002
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.
003
Grid transient
overvoltage,
The transient grid
voltage is higher
than the standard
value. Generally, the inverter will be reconnected to
the grid after the grid returns to normal. If the
fault occurs repeatedly, contact Sungrow
Service.