Omron NX701-1620, User Manual

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6 Inspection and Maintenance
6 - 2 NX-series CPU Unit Hardware User’s Manual (W535)
6-1 Cleaning and Maintenance
This section describes daily maintenance and the cleaning and inspection methods.
Inspect the NX-series CPU Unit daily or periodically in order to keep it in optimal operating condition.
Perform the following cleaning procedures periodically to ensure the NX-series CPU Unit is maintained
in the best operating condition. Always turn OFF the power supply to the Controller before performing
the cleaning procedures.
• Wipe off the dust or dirt on the front, top or bottom of the Unit over with a dry, soft cloth when doing
daily cleaning.
• If dust or dirt remains even after wiping with a soft, dry cloth, wipe over with a cloth that has been wet
with a sufficiently diluted detergent (2%) and wrung dry.
• Perform the following procedure when you clean a Fan Unit used in a dusty environment.
a) Remove the Fan Unit, and clean it with a dry, soft cloth. Do not blow the fan blade strongly with
tools such as a gas duster. Doing so may cause a Fan Unit failure.
b) Remove the dust on the heatsink inside the CPU Unit with tools such as an antistatic gas duster.
Do not touch the inside of the CPU Unit.
• A smudge may remain on the Unit from gum, vinyl, or tape that was left on for a long time. Remove
the smudge when cleaning.
Precautions for Safe Use
• Always turn OFF the power supply to the Controller before attaching or removing the Fan Unit.
The Power Supply Unit may continue to supply power to the rest of the Controller for a few
seconds after the power supply turns OFF. The PWR indicator is lit during this time. Confirm
that the PWR indicator is not lit before you perform any of the above.
• Do not touch the heatsink inside the CPU Unit immediately after turning OFF the power supply.
Doing so may result in burn injury.
Precautions for Correct Use
• Never use volatile solvents, such as paint thinner, benzene, or chemical wipes.
• Do not touch the connectors.
Although the major components in NX-series Controllers have an extremely long life time, they can
deteriorate under improper environmental conditions. Periodic inspections are thus required to ensure
that the required conditions are being kept.
Inspection is recommended at least once every six months to a year, but more frequent inspections
may be necessary depending on the severe environments.
Take immediate steps to correct the situation if any of the conditions in the following table are not met.
6-1-1 Cleaning
6-1-2 Periodic Inspections