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How do I fix an F22/23 (Eeprom Checksum Fault) code for a 9000X Series drive?

This fault means that the microprocessor failed the start-up check. This indicates that it lost some information which means you would probably have to reload the parameters to the drive. This could be caused by a voltage disturbance and may be a single occurrence. If this fault repeats you will have to replace the control board.