Dahua Technology LS UCM-EF Series User Manual page 9

If the video wall has worked for ten hours, turn it off and then turn it on after 15–30 minutes.
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If the video wall has worked for 7×24 hours, turn it off and then turn it on after two hours.
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Temperature, Humidity and Ventilation
The appropriate ambient temperature range for the video wall is 22℃±4℃, and the
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appropriate relative humidity range is 30%–70%, no condensation. There must be no great
temperature and humidity difference.
If the video wall is used in environment with high temperature and humidity, there will be
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tiny water drops on the surface and frame of the video wall. The water drops will flow inside
the video wall. As a result, the glass structure will be damaged, and the liquid crystal
molecule aggregation and outflow will occur. The phenomenon is displayed in Figure 1-2.
During the operation, pay attention to the bellow points.
Before turning off the video wall, make sure that the temperatures of the air conditioners in
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the server room and the room where the video wall is installed are the same.
If the video wall has been off for a long time, check if there are water drops on the surface.
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If there are water drops, do not dry the surface with wet cloth. Dry the surface with
absorbent paper, do not plug it in, and contact the after-sales personnel.
Free quality assurance service is not applicable to damage (includes but not limited to the
damage to the video wall and damage to the user or the third party) results from incorrect using
and maintaining the video wall.
Cleaning
Use degreasing cotton or cloth to clean the screen.
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The ideal detergent is isopropanol or n-hexane. Do not use ketone (like acetone) to clean
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the screen.
Before you clean the screen, pull the plug out of the socket.
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Wet cloth is not allowed to clean the video wall because there will be tiny water drops on
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the surface and frame of the video wall. The water drops will flow inside the video wall. As a
result, the glass structure will be damaged, and the liquid crystal molecule aggregation and
outflow will occur.
The panel is fragile. As a result, you must not press or scratch the surface of the screen
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with great force.
Figure 1-2 Liquid crystal leakage
Maintenance 9