A0177 alarm in WEG CFW701 Drive indicates Fan Replacement is required. This means the main heatsink cooling fan has exceeded its 50,000-hour design lifespan and should be swapped out.
Cause:
- The heatsink fan maximum number of operating hours has been reached.
Note: This function can be disabled by setting parameter P0354 = 0.
Remedy:
Perform preventive fan replacement maintenance.
