Code oFC02: 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 An option card of the same type is already installed in option port CN5-A or CN5-B. Except for PG options, each option card type can only be installed once. Make sure only one type of option card is connected. An input option card is already installed in option port CN5-A or CN5-B. Make sure that a comm. option, a digital input option, or an analog input option is installed. The same type of card cannot be installed twice. Three PG option boards are installed. Maximum two PG option boards can be used at the same time. Remove the PG option board installed into option port CN5-A.
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 oFC02 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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