ABB ACS880-304 +A018 Hardware Manual page 134

134 Maintenance
6. Remove the four M3 (5.5 mm) nuts which hold the fan.
7. Remove the fan from the fan holder.
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8. Put the fan onto the threaded studs on the fan holder with the airflow direction arrow
pointing towards the fan holder.
9. Install and tighten the four nuts removed earlier.
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