76
AAllaarrmm IIDD AAllaarrmm NNaammee CCoorrrreeccttiivvee MMeeaassuurreess
003
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
parameters are appropriately set.
3. If the alarm persists, contact SUNGROW.
004
Grid
underfrequency
005 No Grid
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
connected (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.
006
Overhigh
leakage current
1. The alarm can be caused by poor sunlight or
damp environment, and 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. If the alarm persists, contact SUNGROW.
007 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
local utility grid company for solutions if the grid
frequency exceeds the specified value.
2. If the alarm persists, contact SUNGROW.
9 Troubleshooting and Maintenance User Manual
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