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Fault - 3 - Vac-low

AC under-voltage


Grid voltage is outside the permissible range set by the LCD;After grid resumes normal, wait 5 minutes (default duration) for automatic grid-connection.


Check the grid voltage and grid connections. If the fault is caused by local conditions, ask the electricity provider to adjust the voltage at the feed-in point or to change the value of the monitored operational limits.If the grid voltage lies within the acceptable range and “ Vac-high“ or “ Vac-low “ faults continue,please contact Sungrow.

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