Hey guys, new to the forums here. I have a SmartUPS 1500VA UPS (two of them actually) in my office in Aurora, CO. One of the UPS devices is showing a site wiring fault. Both devices are plugged into the same receptacle. We had an electrician out today to check the receptacle and he's saying there are no problems. I'm a bit confused by why only one of the devices is showing the wiring fault, but I don't know nearly enough about inside electrical wiring to ask the electrician the right questions. Also, I'm remote (in St. Louis) so I'm relying on what my onsite people are telling me. What SHOULD I have him checking for assuming (as I am) that the only thing he did was plug an outlet tester in and check for overloaded neutral, reversed polarity and missing ground? Anything? I have a hard time believing that the SWF indicator is a false positive. Thanks for any assistance.