Sirius 800 www.snellgroup.com Power Supply and Fan Maintenance
Issue 1 Rev 1 Page 31 © 2014 Snell Limited
3. Release the two side plungers on the side of the frame assembly and swing the fan
frame assembly out, this reveals the rear side of the fan assembly.
4. Hold the fan assembly steady with one hand, and hold the fan modules being
removed with the other hand. There are two release tags that free the fan module
from the frame assembly, place your thumb on the release tag on one side, and place
your finger on the release tag on the other side.
5. Carefully push the fan into the frame, then exert pressure onto the release tags, and
withdraw the fan module away from the frame, taking care if the fan is still spinning.
6. Refitting a new fan module is the reverse of removing the fan. Push the fan module
into the frame assembly until the release catch clicks into place. Finally, check that the
fan module starts up. The fan alarm will signal that there is a problem until the fan is
replaced.
7. Close the fan assembly as soon as possible as this ensures correct ventilation of the
frame. Failure to do this will result in failure.
The top row of fan modules are mounted the opposite way around to the bottom row of
fans. The instructions here detail replacement of fans in the bottom row however removal
of fans in the top row is exactly the same method as the bottom row.
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