NEC IP8800/S2400 Series Troubleshooting Manual page 43

■ Before powering off, turn off all power switches or breakers on the device.
• Multiple input power supplies are provided to the device. Before powering off, turn off all power switches (when
AC power supply is mounted) or breakers (when DC power supply is mounted) on the device. The label below
is attached to the device.
■ Work to add or replace equipment must be performed by a trained engineer or
maintenance personnel.
• To add or replace optional components must be performed by a trained engineer or maintenance personnel.
To add or replace a power supply involves to plug and unplug power cables; a person other than the preceding
ones may fail to handle things, which can cause fire disaster, electric shock, and equipment failure. Other
optional components, if handled mistakenly, can also cause fire disaster, wounds, and equipment failure.
■ Do not press the switch on the front panel of the management and switching unit with
a fragile tip, pin, or clip that may get stuck and cannot be removed.
• Do not press the switch on the front panel of the management and switching unit with a fragile tip, pin, or clip
that may get stuck and cannot be removed. Fire disasters or electric shock may be caused.
■ Before addition or replacement of the power supply, unplug the power cable.
• Remove the power cable from the power supply when adding or replacing it. With the power cable connected,
the power supply equipment may remain energized from some circuits even the power switch is turned off.
Therefore, adding or replacing the power supply with the power cable connected may cause a fire or electric
shock.
■ Keep air dusters away from fire.
• If you use an air duster with combustible gas to clean the optical connector, keep away from fire. Otherwise,
fire disaster may occur.
Safety Guide [IP8800/S6300]
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