I agree with Todd and would add that another level of test is to run each power supply independently. This eliminates the slight potential for one power supply to be just out of tolerance (ratio-wise) with the other. That isn't commonly a problem in dual power supply chassis, but it is a frequent problem in the tri and quad power supply systems (higher likelihood of inconsistent tolerances across all power supplies). 
Hello,     I get this alert in hardware log at openmanage:       An this ones in hardware log at openmanage: The power supplies are redundant.                Any idea?
Power supply detected a failure Sensor location