Follow the steps below when troubleshooting an oFA00 fault:

Note: Refer to the appropriate drive technical manual for the location of the CN5-A port.

1. Remove power to the drive.
   • Caution: It is recommended to verify that 10VDC or less is present on the DC bus before performing any service work.
2. Remove the front cover and confirm an option card is connected to port CN5-A.
   • If an option card is present, proceed to step 3.
   • If an option card is not present, remove all control wiring and leave power off for 15-20 minutes. Re-apply power, and if the oFA00 fault is present, replace the control board.
3. Confirm the option card installed in port CN5-A is compatible with the drive. Refer to documents:
   • Input / Output (Analog or Digital) and 120V Option Card Compatibility for Yaskawa Drives
   • Embedded Communications and Option Cards Compatibility for Yaskawa Drives
4. Confirm the option card is installed in the correct option port.
   • Refer to document: Option Card Installation and Mounting Locations for 1000 Series Drives (with Video)
   • Refer to document: Option Card Installation and Mounting Locations for GA800 Series Drives
5. Re-seat the option card by physically removing it from the connector and reattaching it. Apply power to the drive. If the oFA00 fault remains, proceed to step 6.
6. Re-initialize the drive by setting A1-03 = 2220. Be sure to write down or backup parameter settings.
7. Cycle power to the drive and wait for the display to go blank. If the oFA00 fault remains, proceed to step 8.
8. Remove power to the drive and remove the option card.
   • Caution: It is recommended to verify that 10VDC or less is present on the DC bus before performing any service work.
9. Apply power.
   • If oFA00 remains without the option card connected, replace the control board.
   • If oFA00 is cleared, replace the option card.

Note: