Sysmac OMRON NA Series, User Manual

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6 Maintenance
6 - 4 NA-series Programmable Terminal Hardware User’s Manual (V117)
If you discover a fault in the NA Unit during inspections and must replace the NA Unit, observe the fol-
lowing precautions when you replace the NA Unit.
• Back up the NA Unit data. If OMRON performs repairs, the data may be deleted.
• Do not replace the NA Unit until the power is turned OFF.
• Check the new NA Unit to make sure that there are no errors.
• If you return a faulty NA Unit for repair, describe the problem in as much detail as possible and
enclose this description with the NA Unit.
• For poor contact, take a clean cotton cloth, soak the cloth in industrial alcohol, and carefully wipe the
contacts clean. Be sure to remove any lint prior to remounting the NA Unit.
Precautions for Correct Use
If you replaced the NA Unit, transfer the project and the variables with a Retain attribute (i.e.,
variables retained during power interruptions) that are required at startup before you start oper-
ation. Unexpected accidents may occur depending on the relation between the project and the
status of variables retained during power interruptions.
Clean the NA Unit periodically in order to keep it in the best operating condition.
 Cleaning Method
If the touch panel becomes dirty, the displays will be hard to see. Periodically clean the touch panel
as follows:
• Wipe the NA Unit daily with a dry, soft cloth. If the touch panel is very dirty and you try to clean it
with a dry cloth, you may scratch the front sheet. Use a damp cloth first to remove the dirt.
• When a spot cannot be removed with a dry cloth, dampen the cloth with a neutral cleanser (an
approximately 2% solution), wring out the cloth, and wipe the NA Unit.
• A smudge may remain on the NA Unit from gum, vinyl, or tape that was left on for a long time.
Remove any smudges when cleaning.
Precautions for Safe Use
Do not use volatile solvents such as benzene and thinners or chemical cloths.
6-1-3 Precautions When Replacing the NA Unit
6-1-4 Cleaning