Troubleshooting guide

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Use the Switch only with the indicated power supply.
• Do not use the Switch at any voltage other than the indicated voltage. Doing so could result
in fire or electric shock.
Ensure that the capacity for incoming current to the distribution board is
greater than the operating current of the circuit breaker.
• Ensure that the capacity for incoming current to the distribution board is greater than the
operating current of the circuit breaker. If it is not, the circuit breaker might not operate
properly in the event of a failure, which could result in a fire.
Ground the Switch.
• When using an AC model, an AC (PoE) model, redundant power model (with an AC
power supply unit installed), and an EPU, always use a grounded power outlet. Using the
Switch without grounding could result in electric shock or failures due to electrical noise.
• When using a DC model and a redundant power model (with a DC power supply unit
installed), connect a ground cable to ground the switch. Using the Switch without
grounding could result in electric shock or failures due to electrical noise.
Use a DC power supply for which the primary side and the secondary side
are insulated.
• When using DC power, use a power supply for which the primary side and the secondary
side are insulated. Using a power supply that is not insulated could result in electric shock.
Connecting and disconnecting a DC power cable must be performed by a
trained technician or maintenance personnel.
• Connecting or disconnecting the DC power cable to the power supply unit must be
performed by a trained technician or maintenance personnel. Terminal connections are
required for connection of the DC power cable to the power facility. For this reason,
incorrect handling of the DC power cable could result in fire or electric shock.
Before connecting or disconnecting a DC power cable, set the power
supply circuit breaker to OFF.
• Before connecting or disconnecting a DC power cable, set the power supply circuit breaker
to OFF. Connecting or disconnecting the cable with the circuit breaker set to ON could
result in a fire or electric shock.
Place an insulation cover over the G and -48 V terminals of DC power
cables.
• Place an insulation cover on the G and -48 V terminals of a DC power cable (on the side
grounded to the power supply). Using the terminals without an insulation cover could
result in electric shock.
Observe the specified stripping length of the sheath for DC power cables.
• When using a -48 V DC power cable for a redundant power model, adjust the stripping
length of the sheath for the power cable (the switch end) to the specified length. For details
on striping length, see the Hardware Instruction Manual. If the striping length is too short,
connection might fail or the cable might become disconnected. Conversely, if the length is
too long, the core will be exposed, risking a fire or electric shock.
Do not use the Switch with the protection cap removed.
• Do not remove the protection cap except when attaching a cable. Using an AX3800S,
AX3600S, or AX2400S series switch without a protection cap could result in a fire or
electric shock. Note that the following label is attached near the standby power connector