94
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ess
008
Grid
overfrequency
Generally, the inverter will be reconnected to the
grid after the grid recovers. If the alarm occurs
frequently:
1. Measure the grid frequency, and contact the lo-
cal utility grid company for solutions if the grid fre-
quency is beyond the specified range.
2. Check, through the App, whether the protection
parameters are appropriately set.
3. If the alarm persists, contact SUNGROW.
009
Grid
underfrequency
010
Grid Power
Outage
Generally, the inverter will be reconnected to the
grid after the grid recovers. If the alarm occurs
frequently:
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 correctly con-
nected (whether the live wire and the N wire are in
correct place).
4. Check whether the AC switch or circuit breaker
is disconnected.
5. If the alarm persists, contact SUNGROW.
012
Overhigh leak-
age current
1. The alarm can be caused by poor sunlight or
damp environment, and the inverter will be recon-
nected 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. If the alarm persists, contact SUNGROW.
013
Grid abnormal
Generally, the inverter will be reconnected to the
grid after the grid recovers. If the alarm occurs
frequently:
1. Measure the grid frequency, and contact the lo-
cal utility grid company for solutions if the grid fre-
quency exceeds the specified value.
2. If the alarm persists, contact SUNGROW.
10 Troubleshooting and Maintenance
User Manual