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Event number - 501 - Power Frequency Error

Grid fault
The power frequency is not within the permissible range. The inverter has disconnected from the utility grid.


Corrective measures:
• If possible, check the power frequency and observe how often fluctuations occur.If fluctuations occur frequently and this message is displayed often,contact the grid operator and request approval to change the operating parameters of the inverter. If the grid operator gives his approval, discuss any changes to the operating parameters with Service .


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