Troubleshooting guide

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Handle power cables carefully.
• Do not place anything heavy on a power cable. Do not pull, bend, or process a cable. Doing
so could damage the cable, resulting in fire or electric shock. If the power cable is covered
by a carpet, it is easy to forget that the cable is there and to place something heavy on it.
• Use the supplied or a designated power cable. Using another cable could result in fire or
electric shock. In addition, do not use the supplied cable with other devices. Doing so could
result in a fire or electric shock.
• If the power cable is damaged so that the wires underneath the covering are visible or cut,
stop using it, and ask maintenance personnel to replace it. Discontinue using the cable to
avoid the risk of fire or electric shock.
• Make sure the power plug is free of dust, and insert the plug completely up to the base of
the prongs to prevent any looseness. Using a power plug with dust on it or one that is
imperfectly connected could result in fire or electric shock.
Do not overload the power outlet.
• Do not overload the power outlet by connecting multiple power plugs to the same outlet.
Overloading the outlet could result in fire or the circuit breaker tripping due to excessive
power used. This might affect other equipment.
To turn off the power, turn off all power switches of the Switch or the
breaker.
• The Switch has multiple input power supplies. To turn off the power, turn off all power
switches of the Switch (if the Switch has an AC power supply unit) or the breaker (if the
Switch has a DC power supply unit). Note that the following label is attached to the
Switch.
Adding or replacing a module must be performed by a trained technician
or maintenance personnel.
• Adding or replacing optional modules must be performed by a trained technician or
maintenance personnel. Adding or replacing a power supply unit involves connecting and
disconnecting the power cable. If anyone other than those mentioned above performs these
tasks incorrectly, a fire, electric shock, or failure could result. In addition, using optional
modules incorrectly could result in injury or Switch malfunction.