Cisco SNS-3400 Series, CSACS-1121, SNS-3500 Series Maintenance Manual

Maintaining the CSACS-1121, Cisco
SNS-3400 Series, and Cisco SNS-3500
series Appliances

The CSACS-1121, Cisco SNS-3415, and Cisco SNS-3495 Series appliances are configured to order and is ready for
installation when it leaves the factory. After you install and configure your appliance, you may have to perform specific
maintenance procedures and operations to ensure that the appliance is operating properly.

These preventive procedures will maintain your appliance in good operating condition and minimize the need for costly,
time-consuming service procedures.

Caution: To help prevent problems, before performing any procedures in this chapter, review Safety Warnings,

page 7 and the Safety Guidelines, page 1 sections.

The following sections discuss various environmental factors that can adversely affect appliance performance and
longevity. This section includes:

 Maintaining the CSACS-1121 Series Appliance, page 1

 Maintaining Cisco the SNS-3415/3495 Appliance, page 5

Maintaining the CSACS-1121 Series Appliance

Maintaining Your Site Environment

Good preventive maintenance includes regular visual inspections of the appliance, including exterior cleaning and
inspection.

This chapter contains:

 General Exterior Cleaning and Inspection, page 2

 Cooling, page 2

 Temperature, page 3

 Humidity, page 3

 Altitude, page 4

 Electrostatic Discharge, page 4

 Electromagnetic and Radio Frequency Interference, page 4

 Magnetism, page 4

 Power Source Interruptions, page 5

Cisco Systems, Inc. www.cisco.com

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Maintaining the CSACS-1121, Cisco SNS-3400 Series, and Cisco SNS-3500 series Appliances

Maintaining the CSACS-1121 Series Appliance

General Exterior Cleaning and Inspection

This section details the cleaning requirements for exterior surfaces of the appliance. It also provides information on
inspecting cables and adapter cards.

Caution: Never spray cleaning solution on the surfaces of the appliance. Over spray can penetrate into the

appliance and cause electrical problems and corrosion.

Appliance

Use a lint-free, nonabrasive cloth to perform cleaning. Do not use a solvent, abrasive cleaning agents, or tissue paper. If
the appliance is dirty (for example, with thick dust), use a soft damp cloth and gently wipe the surface of the appliance.

Immediately wipe any water or liquid off from the appliance.

Dust and Particles

A clean operating environment can greatly reduce the negative effects of dust and other particles, which act as insulators
and interfere with the operation of an appliance’s mechanical components. In addition to regular cleaning, you should
follow these guidelines to deter contamination of the appliance:

 Do not permit smoking anywhere near the appliance.

 Do not permit food or drink near the appliance.

Cables and Connectors

Periodically inspect cables and connectors to and from your appliance periodically to see if they are worn out or loose.

Adapter Cards

Check the connections on the adapter cards. Ensure that they are secured to the appliance and have not been jarred
loose or mechanically damaged.

Corrosion

The oil from a person’s fingers, or prolonged exposure to high temperature or humidity, can corrode the gold-plated
edge connectors and pin connectors on adapter cards in the appliance. This corrosion on adapter card connectors is a
gradual process that can eventually lead to intermittent failure of electrical circuits.

To prevent corrosion, you should avoid touching contacts on adapter cards. Protecting the appliance from corrosive
elements is especially important in moist and salty environments, which tend to promote corrosion. Also, as a further
deterrent to corrosion, the appliance should not be used in extreme temperatures, as explained in the Temperature,

page 3 section.

Cooling

Exhaust fans in the power supply and in the appliance cool the power supply and the appliance by drawing air in through
various openings in the front of the appliance and blowing it out the back.

However, the fans also draw dust and other particles into the appliance, causing contaminant buildup, which results in
an increase in the appliance’s internal temperature and interferes with the operation of various appliance components.

To avoid these conditions, we recommend keeping your work environment clean to reduce the amount of dust and dirt
around the appliance, thereby reducing the amount of contaminants drawn into the appliance by the fans.

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