3 Maintain the ATCA Subrack
3.3.2 Replace Fan Tray
To replace the fan tray:
1. Open the front doors of the BSC, and connect the anti-static wrist strap.
2. Remove the top front cover.
In case of ATCA shelf 4 remove the cover as shown in the following figure.
Figure 7: Fan Unit Cover
3. If it is the case, identify the faulty fan tray:
The "OOS" LED is lit red, or
The exhaust flap is closed (visible at the rear of the chassis).
4. Switch the toggle switch of the faulty fan tray to "open".
The blue H/S LED will blink and then remain lit steadily.
5. Unplug the faulty fan tray from its location.
6. If the replacement fan should be installed in front position, remove the screw
fixing the handle to the fan unit and remove the handle.
7. Plug the replacement fan tray into its location.
The "OOS" LED is lit red for a short time
The blue H/S LED is lit steadily.
After 15 seconds the blower will automatically start and go to 70% speed.
Fans speed will be decreased in several minutes depending on configuration
and ambient temperature.
8. Check that the exhaust flap is open (visible at the rear of the chassis).
9. Check that the "OOS" LED is switched OFF.
10. Switch the "handle" switch to "closed".
The blue H/S LED will blink and then turn OFF.
3BK 21281 AAAA PCZZA Ed.13
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