Also, I've seen dimmers and CFC light bulbs in the cab ceiling really screw with old Janus units and FCB's. I once had a car where the customer complained that the lights were flickering. I was checking the 120VAC cab light circuit and found read where it was 90Hz. They called the power company and while they were outside checking the transformers I disconnected the dimmer on the cartop and the problem went away.

is it always missing the same node? check 0x000XXXXX code for reference

also make sure that the nodes are freezed
-> freeze node tree

I also get a KUET fault logged.
CaDI tells me that it could be a landing node faulty?

I have just swapped the top of car board and the slave COP board (LONCPI)

My lift has dual COP panels, the slave/ auxiliary panel.will sometimes have non responsive buttons

I have performed a node freeze many times