F0084 fault in WEG CFW701 Drive indicates an Auto-Diagnosis Fault. This means the drive’s internal power-on self-test detected a hardware malfunction or incompatible firmware components.
Cause:
- Defect in the inverter internal circuitry.
- Firmware incompatible with an accessory.
Remedy:
Inspect control board to power pack connections. Verify component and firmware compatibility. Contact technical support if an internal hardware defect is suspected.
