Troubleshooting guide

• Replacing a fan unit of a redundant power model AX3830S

Turn off the power before installing or removing a power supply module.

• Before installing or removing a power supply module, turn off its power. Installing or

removing the module with the power supply module turned on causes a (switch) failure.

The following label is attached to the EPU.

Turn off the power of the power supply modules before turning on the main

power switch of an EPU.

• Before setting the main power switch of the EPU to ON, you must set the power switches

of the installed power supply modules to OFF.

Do not turn off the main power switch of an EPU if the standby power

supply unit is used for the switch.

• Turning off the main power switch of an EPU stops the supply of all standby power to the

switch. Do not turn off the main power switch if a standby power supply unit is being used

for the switch.

Handle memory cards and dummy memory cards carefully.

• When installing a memory card and a dummy memory card, do not force the card. 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 and dummy memory cards. If a memory

card or dummy 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 on the front panel of the Switch 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 or a direct attach cable connector.

• A label attached to the transceiver or direct attach cable connector indicates that the

transceiver or direct attach cable connector 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 from the direct attach cable connector or interfere

with the mechanism that prevents the transceiver or the direct attach cable connector 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 the direct attach cable connector

or cause damage to the Switch.