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10
Troubleshooting and Maintenance
10.1 Troubleshooting
When an alarm occurs, the alarm information can be viewed through the App.
Alarm ID and corrective measures are as follows:
Alarm ID Alarm Name Corrective Measures
002, 003,
014, 015
Grid overvoltage
Generally, the inverter will be reconnected to the grid
after the grid recovers. If the alarm occurs frequently:
1. Measure the grid voltage, and contact the local util-
ity grid company for solutions if the grid voltage ex-
ceeds the specified value.
2. Check, through the App, whether the protection pa-
rameters are appropriately set.
3. Check whether the cross-sectional area of the AC
cable meets the requirement.
4. If the alarm persists, contact SUNGROW.
004, 005
Grid undervoltage
Generally, the inverter will be reconnected to the grid
after the grid recovers. If the alarm occurs frequently:
1. Measure the grid voltage, and contact the local util-
ity grid company for solutions if the grid voltage is be-
low the specified value.
2. Check, through the App, whether the protection pa-
rameters are appropriately set.
3. Check whether the AC cable is firmly in place.
4. If the alarm persists, contact SUNGROW.
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 local
utility grid company for solutions if the grid frequency
is beyond the specified range.
2. Check, through the App, whether the protection pa-
rameters are appropriately set.
3. If the alarm persists, contact SUNGROW.
009
Grid
underfrequency
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