I'm having a little trouble with my UM3E. When I try to pause my print, the command seems to go through. When I try to resume, the printer warms up the primary nozzle but it will not resume.
I eventually get this error "printcore in head slot 2 is taking too long to warm up". I've changed nozzles and the error is still there. I cannot update the firmware since my printer will only run on 3.7.
Funny thing is, it worked the first time I had turned the printer on. Now it refuses to resume. Does anyone know how I can diagnose the issue?