Daktronics Galaxy AF-3165, Manual

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Maintenance and Troubleshooting
42
4.5 Ventilation Systems (With Fans and Filters)
Ventilation fans should be checked after 1,500 hours of operation and every 1,500 hours after that to
ensure the display is being cooled properly. Fans should be checked more often if the display is located
in a dusty or harsh weather environment (i.e. along a gravel road with dust laden air).

1,500 hours is equivalent to 83 days if the display is operated for 18 hours a day and the
power to the display is turned off when not in use.

1,500 hours is equivalent to 62 days if the display is running non-stop for 24 hours a day.
Each time a module is removed, for whatever reason, take a minute to inspect the fans.

Check the fan blades for dirt and debris. If the fan blades have a large accumulation of dirt
and debris, this indicates that the filters must be changed more often. Fan blades must be kept
clean to maintain fan efficiency and ensure proper cooling.

Spin the fan blades with a pen or pencil to ensure that the bearings are free and the fan is still
in balance.
To check the operation of the fans, push the bypass button (momentary contact) on the thermostat
enclosure to temporarily turn the fans on: (The bypass button is located behind A102, top row, and
second module from the left.)

Hold your hand or a piece of light paper beneath the display to detect air movement.

If the fan does not turn or does not operate smoothly, replace it.
Filters must be checked once a year or after every 1,500 hours of operation, whichever comes first.
Filters can be cleaned with water and a mild detergent, such as dish soap. Compressed air can also be
used to clean the filters provided the nozzle is held at least six inches away from the filter, the pressure
is no greater than 60 psi and the air is blown through the filter in the opposite direction from which air
normally flows. The arrow stamped on the frame filter indicates airflow direction.