F0153 fault in WEG CFW701 Drive indicates Internal Air Overtemperature. This means the ambient air inside the drive exceeded critical limits, triggering a protective shutdown.
Cause:
- High surrounding air temperature (>50 °C (122 °F)) and high output current.
- Defective internal cooling fan (if existent).
Remedy:
Shut down the inverter and check enclosure ventilation. Verify cooling fan function.
