NV8500 family Digital Routers • User’s Guide 103
5. Maintenance
Air Flow
Air Flow
Routers in the NV8500 family draw cooling air from the front of the router, through the door, and
exhausts heated air through the rear of the frame. The router must have the door properly installed
and closed for proper airflow through the chassis. For maximum air flow, regularly inspect router
fans and filters.
Fan Cleaning and Replacement
Two fan trays each containing five cooling fans are located at the top and bottom of the router
frame. The tray can be removed for inspection or cleaning by opening the frame front door, sliding
the latches that hold the fan module in place, and pulling the module out of the frame. If the fans
become dusty or clogged with lint, use a vacuum or compressed air to clean the dust off. Also
check the openings at the back of the frame where air enters and exits to be sure dust and lint have
not accumulated.
Each fan tray is easily replaced simply by sliding it out of the front of the frame and inserting a new
tray.
Intake Filter Screen Cleaning
The NV8500 family of routers have an air filter mounted in the door.
To remove the filter, open the router door by releasing the two thumbscrews. Locate the filter
enclosure on the inside of the door. Tabs on the bottom of the filter act as hinges and tabs at the top
of the filter lock it in place.
The router can be operated safely with the door opened for short periods of time. If the filter is only
lightly contaminated, clean the filter by vacuuming loose debris or by blowing air from the inside
outward. Rinse filters badly loaded with debris with cold water or wash them with warm water and
mild detergent. Be sure the filter is completely dry before re-installing it.
Battery Replacement
If the red Low Battery LED indicator on the control card is lit, the battery located on the front edge
of the card needs replacing. Grasp the exposed edge of the battery with your fingers and pull it
towards you to remove it.
Call
Miranda for replacement battery information. For contact information, see Technical Support
Contact Information on page iii.
Caution If airflow is impeded overheating may occur.
Important Do not use a metallic tool to remove the battery.
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