CONVERTER COOLING FAN FAILURE

What does 443 n AXIS: CNV. COOLING FAN FAILURE mean?

This warning signal on the Fanuc Series 0i-D/0i Mate-D αi servo system indicates a failure of the converter cooling fan. This condition (SVWRN4 and SVWRN3 active) will lead to a converter overheat alarm if not addressed.

• Cooling fan motor failure in the converter unit.
• Obstruction or blockage of the fan's intake or exhaust, reducing cooling efficiency.
• Loose or damaged electrical connection to the converter cooling fan.

Click steps to track your progress.

1. 1

   Visually inspect the converter cooling fan for any blockages from dust or debris, and check for physical damage to the blades.

2. 2

   Verify the power connections to the converter fan for tightness and absence of corrosion.

3. 3

   Observe the fan's operation during power-on; check for proper rotation and absence of abnormal noise.

4. 4

   Ensure that the air passages for the converter cooling are clear and unrestricted.

5. 5

   If the fan is determined to be defective or not functioning, replace the converter cooling fan unit.