Cause : Option Card Fault at Option Port CN5-C comes when option not properly connected or the option card connection to port CN5-C is faulty.

• Turn the power off and reconnect the option card.
• Check if the option card is properly plugged into the option port. Make sure the card is fixed properly.
• Try to use the card in a different option port (in case of a PG option, use port CN5-B). If the option card works properly in a different option port, CN5-C is damaged, and the drive requires replacement.

If the error persists (oFA01 or oFb01 occur), replace the option card.