I've got a 2016 V1 that's been running fine since about January 23rd. Unfortunately, I came in yesterday to it being offline (BI shows it went down around 1:06pm). The injector was flashing away showing a fault in it's protection circuit. I unplugged it and got to it this morning. I tried a different injector (that's currently running an Enster 4x) and that injector immediately exhibited the same flashing. I tried it's injector on the Enster, and it worked flawlessly. So, I grabbed the ladder (the Huisun is 25 feet up) and went out to the road to test. The Ethernet cable tested fine. I grabbed the Enster off the shed, and tried it up there. It worked fine (so I left it there). I brought the Huisun into the garage and tried it with the injector from the Enster and a known good 3 foot patch cable. No dice. Finally, I grabbed a 12v/5A brick adapter and gave it a shot. All good. So.... that means the POE module is bad. Mine makes the 3rd case that I've heard of the POE module taking a dump. Anyway, I put the Huisun 10x on the shed and am powering it with the brick for now. Hopefully Huisun will give me a new POE module as I'd really rather have the 10x at the street and the 4x on the shed...