F0085 fault in WEG CFW500 Drive indicates the Plug-in Module Will not Start. This means the accessory card failed to initialize properly, likely due to a defective board or missing firmware.
Cause:
- Defect on the plug-in module.
- Poor contact on the connections of the plug-in module to the inverter.
- Plug-in module does not have firmware loaded.
Remedy:
Verify physical seat of the plug-in board. Check for firmware matching.
