Daktronics AF-3150-20-R,A - Manual (Page 51)

Maintenance and Troubleshooting
4-13
• 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.
4.6 Thermostats
Reference Drawing:
Comp.
Layout Diagram; ........................................... Refer to Appendix A
A thermostat controls when the ventilation fans are turned on in the display. Refer to
the Component Layout Diagram and
Figure 35 for the location of the thermostat.
The ventilation fans turn on when the inside of the display reaches 85
° F (29° C),
and turn off at 70
° F (21° C).
4.7 Weather Stripping
To ensure that the display is waterproof, weather stripping has been provided around
the entire display and around each module. It is important that the weather stripping
is installed properly at all times or water may leak into the display and damage the
components.
4.8 Display Maintenance
A yearly inspection should be completed to maintain safe and dependable display
operation. This inspection should address the following issues.
• Loose Hardware
Verify fasteners, such as bolts and rivets, have not come loose. Fasteners
should be checked, tightened, or replaced as required.
• Excessive Dust Buildup
Occasionally it may be necessary to vacuum the inside of the display
cabinet to remove dust/dirt buildup that may interfere with airflow.
• Water Intrusion – Water Stain Marks
Water can enter the display where weather stripping has come loose or
deteriorated, where fasteners have come loose allowing gaps in the panels,
or where moisture may be entering around hardware. Be sure to check
around the lift eyes and bolts to ensure that water has not entered there. If
so, replace hardware immediately to prevent more water from entering the
display. Also, check electronic components for possible corrosion.