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AC890PX CS module not in Run

I have an AC890PX Drive. The CS Module, after power up won't supply any DC power. The Run LED is turned off and the fans do not run. What can cause this problem? All other modules in the rack are healthy and awaiting DC Power.

The manual is extremely vague on this issue and basically says "CS module cannot supply DC Power" and that is it. It gives no clues as to what can cause this issue.

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