Daktronics Valo Digital Billboard - Manual (Page 35)

Routine Maintenance 27
8. Press the gasket down and ensure it is flush along the lip.
9. Close the spare parts box list to ensure the gasket does not inhibit the lid closing.
6.6 Fan Operation
1. Regularly check fan function. To do so, hold a hand or a piece of light paper above the
fan to detect air movement.
2. Check that the thermostats are operational. If the thermostats are operational, but the fan
is not operational, replace the fan. If a thermostat is not operational, replace it and check
fans again.
3. If the fan does not turn or does not operate smoothly, replace it. After replacing 10
percent of the fans, Daktronics recommends replacing all cooling fans to reduce
associated maintenance costs that may incur with increased heat buildup from fan
failure.
6.7 Control Cabinet Heating Inspection
Issue
The heating and cooling systems for digital billboard controllers are not sufficiently heating
or cooling some control cabinets. When the control cabinet is too hot or cold, display content
may not display properly and have issues such as slow playback, flickering content, or
playback failure. This could be caused by many things, including:
• the thermostats being set to the incorrect temperature
• the heating or cooling device not being connected
• the heating or cooling device not functioning properly.
Discovery and Repair
All controllers are shipped with heaters, but not all control cabinets are shipped with a/c
units. Refer to the project BOM to determine if the control cabinet should have an a/c unit.
The most likely cause of the control cabinet being over or under temperature is that the
thermostat is not set to the correct temperature.
• For heating, thermostats should be set at 50° F
• For cooling, a/c thermostats should be set at 80° F
Sometimes the heating and cooling components malfunction, which may cause the control
cabinet to overheat. To test the heating and cooling equipment, perform the following tests.