Any idea what devices have those IPs addresses? I'm with Rathji in that the tracert points to conflicting routing rules, but the 7AM observation kind of undermines this idea. I'd take with 7AM observation with a grain of salt until you can repeat the observation yourself.
Without having access to the routers, I would try to simplify the network path to the printer for testing purposes. For example, how many switches/hubs are between the printer and the router(s)? Can you plug the printer directly into a built-in switch on the router(s) and eliminate some hops? Failing that can you plug the printer into the same switch/hub that is used by the PC that you can remote control (since you know you have a valid path to that PC...)? If any of this works then it implies a wiring or hardware problem as Azure stated, but if you still can't reach the printer then I don't think any conclusion can be drawn without knowing more about the network within that location. And even if you can now reach the printer you may have caused issues for someone else...
In short, good luck. You're gonna need it.
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