Troubleshooting guide

xxxvi
Do not turn off the power during a software update (while the ppupdate
command is executing).
• The Switch automatically restarts after the ppupdate command is executed. Do not turn
off the power while the Switch is restarting (wait until the STATUS LED of the control and
switching unit changes from blinking green to solid green). Turning off the power could
result in a switch fault.
Handle memory cards carefully.
• When inserting a memory card, do not push the card too strongly or flick it with your
finger. When removing a memory card, do not forcibly pull out the card if it is locked.
Doing so might damage the connector of the memory card slot.
• When moving the Switch, remove memory cards. If a memory card is subjected to
excessive force when the Switch is moved, the connector of the memory card slot might
be damaged.
When the ACC LED is lit, do not remove the memory card or turn off the
power.
• When the ACC LED of the control and switching unit is lit, the memory card is being
accessed. When a memory card is being accessed, do not remove the memory card or turn
off the power. Doing so might damage the memory card. In addition, some commands
require a certain amount of time after being entered to finish accessing the card. Make sure
that the memory card is no longer being accessed before removing the card or turning off
the power.
Do not attach any labels to a transceiver.
• A label attached to the transceiver indicates that the transceiver is a standard product from
ALAXALA or another manufacturer. However, such labels are attached where they do not
interfere with heat dissipation from the transceiver or the mechanism that prevents the
transceiver from coming loose from the cage. Attaching a label to a location that interferes
with these functions could cause a malfunction in the transceiver or damage to the network
interface units.
Ensure that voltage drop does not occur in the power facility due to inrush
current.
• Turning on the Switch causes inrush current. Ensure that voltage drop does not occur in
the power facility due to the inrush current. Voltage drop could affect not only the Switch,
but also other devices connected to the same power facility.
Turn off the power before connecting or disconnecting a power cable.
• Before connecting or disconnecting a power cable, turn off the power of the power supply
unit of the cable that is to be connected or disconnected.
When replacing a fan unit with the Switch turned on, observe the time limit.
• When replacing a fan unit with the Switch turned on, you must remove and replace the unit
within one minute. If this time limit is exceeded, the temperature inside the Switch rises.
This might affect other units.