Thermal Runaway Error after 8 Hours
Just finished building the printer yesterday, made the PRUSA logo and the helical bearing with no issues. Created a four-hour print on my computer, that ran with no issues. I then started a 15-hour print, which failed after an hour with a THERMAL RUNAWAY error. I've checked the cabling and wiring as per standard, couldn't find anything out of the ordinary. Has anyone else gotten this at a low-hour print, or is it something else?
RE: Thermal Runaway Error after 8 Hours
Preheat the printer for PLA and watch the temperature of the hotend and the heatbed rise. The heatbed temp should slowly rise in tempurature while the hotend should rapidly rise
If the preheat fails with a THERMAL RUNAWAY error for the bed then you have an issue with the heatbed heater wiring connections, the 15A fuse, or the thermister attachment for the heatbed. If the 15A fuse has blown then you probably had a short in your heatbed wiring that needs to be fixed first. Check that the thermister taped to the bottom of the heatbed PCB is in hard contact with the PCB by pressing on it with your finger.
If the preheat fails with a THERMAL RUNAWAY error for the hotend or extruder then you have an issue with the wiring connections to the hotend heater cartridge or a hotend thermistor that has come loose from the hotend heater block.
RE: Thermal Runaway Error after 8 Hours
I ended up fixing it from another forum post, where the user disconnected the power panic from the power supply. Did the same thing, it's been running for about 40 hours now.