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For Accusine SWP,what does mean the alarm message "Voltage out of tol." and what action to be taken?

This alarm message means that the amplitude of the Mains voltage is out of the permitted limits.

Corrective Actions:
Check the presence and amplitude of Mains 3 phases and neutral.
Check the voltage at the AccuSine SWP inlet.
The voltage tolerances permitted are defined in the AccuSine SWP Installation Manual 990–4530
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