Troubleshooting guide

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due to the high output power of EPU-B.
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.
Remove the power cable when installing or removing a power supply unit.
• When installing or removing a power supply unit, remove the power cable from the power
supply unit. If the power cable is connected and the power switch is turned off, power is
still supplied to some circuits. Because of this, if you install or remove a power supply unit
with the power cable connected, a fire or electric shock could result.
Adding or replacing a module must be performed by a trained technician
or maintenance personnel.
• Adding or replacing a power system or module, or replacing the fan unit must be
performed by a trained technician or maintenance personnel. Adding or replacing a
module requires connecting or disconnecting power cables. If anyone other than those
mentioned above performs these tasks incorrectly, a fire, electric shock, or failure could
result.
Do not use an air duster near a flame.
• When cleaning the optical connectors, do not use an air duster that contains flammable gas
near a flame. Doing so could result in a fire.