Toolhead-Verbindung verloren: Was tun?

I had by now 3 „Toolhead lost connection ….“ (No 1, 3, 4 and Th 3 wasn‘t even involved in this print) 1 „Th 1 temperature abnormally - check termistor cables“ and 2 others (one was 0003-0522-0000-0002) witch required „power off - check cables - power on - resume print. There wasn‘t anything to check but the prints resumed. As you can‘t reboot the printer remotely it is stepping on my nerves.

Has anybody an idea?

Open a ticket:
https://snapmaker.formcrafts.com/u1-troubleshooting-request

Here is the wiki:
https://wiki.snapmaker.com/en/snapmaker_u1

https://wiki.snapmaker.com/en/snapmaker_u1/troubleshooting/u1_error_codes

And the next “TH 1 lost connection to MCU ….” within a 24-hour print. And TH1 had been running empty for 3 hours, and TH2 had taken over.

My scheduling (especially with regard to print bed changes) is being continuously completely ruined.

And the next “TH1 lost connection to MCU”! Before I could react, the build plate with PETG had cooled down, and the resume function pushed the objects around. I’m slowly losing my patience.

And while I was creating the ticket, I got “TH2 lost connection” again…

Are you kidding me? I tightened the cable screws, and at TH1 they are now already dangerously deep (original warning), etc. …

When did you assemble the printer, or, have the toolheads been performing well before ? Can you double check the usb cable connections, i.e. are they sitting firmly in that USB-C Slot ?