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92
Fault code Fault name Corrective measures
2, 3, 14, 15
Grid Overvoltage
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 con-
tact the local electric power company for solu-
tions 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.
Modify the overvoltage protection values with
the consent of the local electric power
operator.
3. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.
4, 5 Grid Undervoltage
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 con-
tact the local electric power company for solu-
tions 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. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.
9 Troubleshooting and Maintenance User Manual