Daktronics AF-3080-68-R,A - Manual (Page 54)

To check the operation of the fans:
• Hold your hand or a piece of light paper beneath the sign to detect air
movement. If the operation of a fan is questionable, a fan-test should be
performed
• Press button on the internal thermostat and ensure they run freely.
• If the fan does not turn or does not operate smoothly, replace it.
4.9 Thermostats
A thermostat controls when the ventilation fans operate in the sign. Refer to the
Display Assembly drawing for the location of the thermostat. The ventilation fans
turn on when the inside of the fan reaches 85
°
F (29
°
C), and turn off at 70
°
F (21
°
C).
4.10 Sign Maintenance
Perform a yearly inspection to maintain safe and dependable sign operation. This
inspection should address the following issues:
• Loose Hardware
Verify fasteners, such as bolts and rivets, have not come loose. Check,
tighten, and replace fasteners as required.
• Excessive Dust Buildup
Occasionally it may be necessary to vacuum the inside of the sign cabinet to
remove dust/dirt buildup that may interfere with airflow.
• Water Intrusion – Water Stain Marks
Water can enter the sign where weather stripping has come loose or
deteriorated or where fasteners have come loose allowing gaps in the panels
or where moisture may be entering around hardware. Check electronic
components for signs of corrosion.
• Corrosion
Check the paint; look for possible corrosion, especially at footings,
structural tie points, and ground rods.
If you notice any of the above conditions, take action to correct the situation.
4.11 Weather Stripping
To ensure the sign is weather resistant, Daktronics provides weather stripping around
the entire sign and around each module. The weather stripping must be properly
installed at all times or water may leak into the sign, damaging the components.
Maintenance and Troubleshooting 4-12