Code oFC01: Option Card Fault at Option Port CN5-C
Issue Description & Safety Warning
The Yaskawa A1000 AC Drive has triggered a critical Option Card Fault at Option Port CN5-C alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Code type: Fault Manual section: Yaskawa A1000 Troubleshooting The option board 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 another option port (in case of a PG option use port CN5-B). If it works there, replace the drive. If the error persists (oFA01 or oFb01 occur), replace the option board.
Source: Yaskawa AC Drive A1000 High Performance Vector Control Drive Technical Manual (SIEP C710616 21H)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Yaskawa A1000 AC Drive Alarms
Yaskawa controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code oFC01 on the A1000 AC Drive identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Yaskawa's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 280 Yaskawa A1000 AC Drive codes.
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