Yes.
I am also suspecting AC power fluctuations, they had a F1 00 and a U2 91 about 4 weeks ago, it is in an old house that was converted to an office many years ago and they moved the copier to the kitchen area sharing circuit with a refrigerator and other appliances just before that ( about 5 weeks ago), I told them they need to get the copier on its own circuit. I have read that dirty power can cause random U2 codes.
Problem is weird.
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