Proface FP3900 - 19 Flat Panel" - Manual (Page 4)

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In a situation that a detection function for the backlight burnout has been ineffective, if a burnout of the backlight
happened, unlike in an extinction condition of the backlight of FP, the touch panel is still active. If an operator fails
to notice that the backlight is burned out and touches the panel, a potentially dangerous machine miss-operation can
occur. Therefore, do not set up switches on the touch panel of an FP that are likely to cause human error or physical
damage triggered by mis-operation.
If your FP’s backlight suddenly turns OFF, use the following steps to determine if the backlight is actually burned
out.
1) If your current FP application or Auto off Disp function is not set, and the screen has gone blank, your backlight is
burned out.
2) If your current FP application or Auto off Disp function is set, and if touching the screen does not cause the dis-
play to reappear, your backlight has been burned out.
If substantial amounts of metallic dust, water or liquids enter the FP unit, turn off the power supply immediately,
unplug the power cord, and contact your local FP distributor.
When installing the FP unit, be sure to follow the instructions given in “Chapter 3 Installation and Wiring,” to insure
it is done correctly.
Do not use the FP in an environment with flammable gas, since it may cause an explosion.
The FP is not appropriate for use with aircraft control devices, aerospace equipment, central trunk data transmission
(communication) devices, nuclear power control devices, or medical life support equipment, due to these devices’
inherent requirements of extremely high levels of safety and reliability.
When using the FP with transportation vehicles (trains, cars and ships), disaster and crime prevention devices, vari-
ous types of safety equipment, non-life support related medical devices, etc, redundant and/or failsafe system
designs should be used to ensure the proper degree of reliability and safety.
Do not press the screen’s touch surface too strongly with either your finger or a hard object, since the touch surface
may be damaged.
When the surface of the display screen becomes dirty or smudged, clean the display with a cloth soaked in a neutral
detergent. Do not use paint thinner or organic solvent.
Do not press on the touch panel's face with sharp objects, such as a mechanical pencil or screwdriver, since it might
damage the LCD panel.
Avoid using or storing the FP in direct sunlight, excessively dusty or dirty environments, or where chemicals or their
vapors are present in the air.