On a Bizhub C450 the C-F023 code could be following.
-RAMs on PWB-ES Board.
-Old FW Version.
-Connection problem.
-PWB MC
-PWB MFP.
I would suggest you have a tech make a memory check in "state confirmation" in service mode , clean and reseat all memory chips and upgrade the machine to the newest Firmware.
SOURCE: bizhub c250 error code
There are 4 things to try to reset any error codes on these machines
1.) open and close front door
if that fails go to number 2
2.) open front door and turn off main power switch and then turn back on and close front door.
if that fails go to number 3
3.) turn machine off and then turn back on while holding down the utility/counter button after a while a trouble reset box will appear on the screen press on the box and then restart the machine.
If this fails go to number 4
4.) failing all this call your local service agent.
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