Cause: Boards Compatibility comes when a mismatch or incompatibility between the various control boards within the drive. An incompatible or incorrectly installed option card can trigger this fault.

"HCF" Boards Compatibility Fault in a Schneider ATV950 drive indicates that there is an issue with the compatibility between the different boards or modules within the drive. This could be due to an incompatibility between the firmware versions of the boards, incorrect board installation, or a hardware fault.

1. Refit the original option module.
2. Confirm the configuration by entering the "Pairing password" "PPI" if the module was changed deliberately.