I have a delta electronics dps-400lb a psu with 3 wires that I am not familiar with.

Weave113

Honorable
Dec 21, 2013
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I have a delta electronics dps-400lb a psu with 3 wires that I am not familiar with. The wires are brown, orange and red wrapped together with a small white 3 pin plug attached. Does any one know what that plug is for? When I plug in the pcu, the computer turns on without pushing the computer "on" button. It also has a buzzer reset button on the back next to the"Fan fail over temp" led. I've never seen these accessories before either. Are they related to the brown, orange and red plug?
Thanks for any help.