Did you change your wifi settings, router, mobile device, location, or anything else since the last time you connected? The red light indicates the pump has power which is what we want. If you see no other light then your pumps are disconnected from the router. When you do the long press on the reset button does the blue led indicator on the pump turn on and off for 2sec? If so that is as far as you can go with the pump itself as it is set up and entered the network distribution mode.
At this point, you need to make sure that you are connecting to a 2.4ghz only signal or mobile hotspot. These devices do not work with 5ghz. From there make sure your mobile device is connected to the 2.4ghz signal and you are logging into the correct registered account for your pumps. Once entered you can add the pumps back to your network.