So it happened again today, error code 02. I dismantled it again, totally cleaned the grinder unit and throughly dried it. I replaced the 2 ceramic grinder rings. I also noticed a high level of resistance in the rotation of the bottom grinder assembly, so I dismantled it and removed the bearings. The larger flat bearing moved with very little resistance but the smaller one on the bottom had more resistance than I thought it should. It is very close, if not the same, to a bearing for a skateboard wheel. I oiled it with some mineral oil for my razor. It is a sealed unit but some oil did seep in and it gained less rotational resistance.
The part numbers for the grinder bearings are HGB 6900RS for the smaller bottom one,
and HGB 342 35252 for the larger flatter bearing. I will be ordering both if I can find them.
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