Hitachi NAS Platform 4000 Series Hardware Reference Manual page 66

Figure 29 Fan status LEDs
Item
1
2
3. Remove the faulty fan by loosening the thumbscrews (turning them counter-
clockwise) until they are loose, then pulling the fan unit straight out of the chassis.
(The fan lead connector disengages automatically as you remove the fan assembly.)
Figure 30 Fan assembly - model 4040
Chapter 5: Replacing server components
Hitachi NAS Platform and Hitachi Unified Storage Series 4000 Hardware Reference
Fan 1 status LED
Fan 2 status LED
Replacing a fan
Description
66