If the Pi has network (could be cable or WiFi in range if it's actually a Pi Zero W) then configure it as a web server, create a port forward on your router so the web server is publicly accessible, maybe on an odd port, and set UptimeRobot to monitor it - you will get an email when it goes away.
Also get the source of the tripping investigated before something terribad happens.
If the Pi has network (could be cable or WiFi in range if it's actually a Pi Zero W) then configure it as a web server, create a port forward on your router so the web server is publicly accessible, maybe on an odd port, and set UptimeRobot to monitor it - you will get an email when it goes away.
Also get the source of the tripping investigated before something terribad happens.