Chances are it is more of a compatibility issue between your 1415 and the router you are using. For example, your printer may be going to sleep and the router may be retracting its IP Address due to inactivity. When the printer wakes up it grabs the next IP Address in line which happens to be something different than what your computers are looking for.
One way you can know for sure is to check the IP Address that is assigned to your printer from before and after the outages. If the printer has a different IP Address from before and after that means that the router is responsible for reassigning it to someone else. You either need to keep your printer awake or beef up the IP Assigment rules on your router for longer periods of time.
Try recording your IP address now and wait for another outage. When the outage occurs then check the IP for the printer again. If the printer has an IP then try to talk to it through PING to confirm it is still active or not. You should also check the list of registered devices on your router when this happens. If you have any new IP Addresses online at that time then try to ping them too.