94
Fault Code Fault Name Corrective Measures
8
Grid
Overfrequency
Generally, the inverter will be reconnected to the
grid after the grid returns to normal. If the fault oc-
curs 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.
3. Contact Sungrow Customer Service if the pre-
ceding causes are ruled out and the fault persists.
9
Grid
Underfrequency
10
Grid Power
Outage
Generally, the inverter will be reconnected to the
grid after the grid returns to normal. If the fault oc-
curs repeatedly:
1. Check whether the grid supplies power reliably.
2. Check whether the AC cable is firmly in place.
3. Check whether the AC cable is connected to
the correct terminal (whether the live wire and
the N wire are correctly in place).
4. Check whether the AC circuit breaker is
connected.
5. Contact Sungrow Customer Service if the pre-
ceding causes are ruled out and the fault persists.
12
Excess Leakage
Current
1. The fault can be caused by poor sunlight or
damp environment, and generally the inverter will
be reconnected to the grid after the environment
is improved.
2. If the environment is normal, check whether
the AC and DC cables are well insulated.
3. Contact Sungrow Customer Service if the pre-
ceding causes are ruled out and the fault persists.
13 Grid Abnormal
Generally, the inverter will be reconnected to the
grid after the grid returns to normal. If the fault oc-
curs repeatedly:
1. Measure the actual grid, and contact the local
electric power company for solutions if the grid
parameter exceeds the set range.
2. Contact Sungrow Customer Service if the pre-
ceding causes are ruled out and the fault persists.
9 Troubleshooting and Maintenance User Manual
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