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SINAMICS G: Alert F30002 Upon Simodrive Sinamics g120c

Hello,
I get alarm F30002 (Dc link overvoltage) during motor running.
The AC input voltage isn't stable ( i get 410-430 Vac during the day).
R949 is 816.1 Volt when i get the issue.
(during motor run is from 590 to 610 VDC)
So i tryed to put p210(power supply voltage) from 400 to 430 vac, but sometime i get
F30002 Anywway.
Is there any way to solve this problem?
thank you

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