Troubleshooting guide

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Do not install the Switch in a dusty or humid location.
• Do not install the Switch in a dusty or humid location. Doing so could result in fire or
electric shock.
• Condensation might form on the surfaces and the inside of the Switch if it is moved from
a cold location to a warm location. Using the Switch in this condition could result in fire
or electric shock. After moving the Switch between two locations with a large temperature
variation, let the Switch stand a few hours before using it.
Do not stack Switches on top of one another.
• Do not stack Switches on top of one another. Doing so might damage the Switch.
Furthermore, the Switch might fall, or become unbalanced, resulting in injury.
Do not step on the Switch, lean against it, or place anything on it.
• Do not step on the Switch, lean against it, or place anything on it. Doing so might damage
the Switch. Furthermore, the Switch might fall, or become unbalanced, resulting in injury.
When mounting the switch in a rack, use guide rails or a shelf.
• Rack mounting brackets of the Switch are for securing the Switch to the rack, not for
supporting the weight of the Switch. Use guide rails or a shelf. Note that you need to use
the guide rails or shelves that are supplied with the rack and that can support the weight of
the switch (when all optional modules are mounted).
Do not obstruct the ventilation slots.
• Do not obstruct the ventilation slots of the Switch. Doing so causes heat to accumulate
inside the Switch, and could result in a fire. Maintain a space of at least 70 mm around the
ventilation slots.
Do not allow hair or objects near the ventilation slots.
• Cooling fan units are mounted in the Switch. Do not allow anything near the ventilation
slots. Doing so causes heat to accumulate inside the Switch and could cause a failure. Do
not allow hair or other objects near the ventilation slots. They might be sucked into the
Switch, resulting in injury.
When moving the Switch, do not hold the handle of an optional module.
• When moving the Switch, do not hold the handle of a fan unit or power supply unit. The
handle might come off, resulting in the device falling and possibly causing injury.
Moreover, the fan unit or power supply unit might become damaged, resulting in a fire or
electric shock.
When moving a Switch, unplug all cables.
• Before moving a Switch, you must turn it off and unplug all cables. Failure to do so might
cause the Switch or cable to become deformed, or might damage the Switch, resulting in
fire or electric shock.
Do not drop optional modules.
• Handle the optional modules with care to avoid dropping them. Dropping them might
cause injury.
• A DC power supply unit weighs 5.6 kg and is 163 mm long. When removing a power