FF39
Power Off Required
Allen-Bradley · ABB ACS800 Standard Firmware
What does FF39 mean?
The inverter type (e.g., sr0025_3) has been changed, a process typically performed at the factory or during drive implementation. This alarm indicates that a power cycle of the control board is specifically required to validate and apply the new inverter type configuration.
Source: ABB ACS800 Standard Firmware
Open Manual (Page 236)