F176 fault in WEG CFW900 Drive indicates an Internal Fan Speed Fault. This means one of the internal electronic cooling fans is failing to reach its commanded speed.
Cause:
Internal fan 2 speed fault.
- Dirt on the fan blades and rolling bearings.
- Defective fan.
- Defective fan power supply connection.
Remedy:
Clean fan blades and secure connections. Replace if mechanically failed.
