A190 / A191 Int. Fan 1, 2 Speed Internal fan low speed alarm fault in WEG CFW900 Drive. These alarms indicate an Internal Fan Low Speed. This means an internal cooling fan is operating below optimal speed and requires maintenance.
Cause:
- Dirt on the fan blades and rolling bearings.
- Defective fan hardware.
- Defective fan power supply line connection.
Remedy:
Check internal fan blades and clear dirt. Ensure power supply connections to the fan are secure. Replace the fan module if mechanically defective.
