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Error probably caused by changing a card.
There are four CFF fault messages to troubleshoot.
-PWR RAT ERR-ENT: Change on the power board ratings, maybe someone changed out the power board.
-Option ERR, -ENT: Option board changed or they installed a new option board.
-Opt. Remove-ENT: Option card was removed.
-EEP CKS,-ENT: Saved configuration cannot be read. ENT button will prompt you to do a factory reset.
Other troubleshooting tips:
Check the J connections between the main control board and power board to see if they are loose or disconnected.
Reset the drive back to a factory default.
Check cooling fans to see if they are running. You might get CFF if the cooling fans are bad too. Just check them.
Reference manual VVDED397047USR8/02 page 96.