Troubleshooting guide

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If anything seems wrong, immediately turn off the power.
• If smoke or an unusual smell is emanating from the Switch, or if liquid is spilled into the
Switch or a foreign object falls into the Switch, immediately turn off Switch power as
described below. Continuing operation could result in fire or electric shock.
• If the Switch has an AC power supply unit, turn off the Switch, and then unplug the power
cable.
• If the Switch has a DC power supply unit, turn off the Switch, and then set the power
supply circuit breaker to OFF. This is required for terminal connections.
Do not place the Switch in an unstable location.
• When installing the Switch on a table, position the Switch horizontally on a worktable
strong enough to bear the weight of the Switch. Placing the Switch in an unstable location,
such as on an unsteady or tilting surface, might cause the Switch to fall, resulting in serious
injury to yourself and others.
Do not remove the Switch cover.
• Do not remove the Switch cover. Doing so could result in electric shock.
Do not allow any foreign objects to get into the Switch.
• Do not insert or drop any foreign objects, such as anything metallic or flammable, through
the Switch's ventilation slots. Doing so could result in fire or electric shock.
Do not modify the Switch.
• Do not modify the Switch. Doing so could result in fire or electric shock.
Do not subject the Switch to shocks.
• In the event that the Switch is dropped or any of its components are damaged, turn off the
power, unplug the power cable, and contact maintenance personnel. Discontinue using the
cable to avoid the risk of fire or electric shock.
Do not place any objects on the Switch.
• Do not place any metallic object such as a small pin or a paper clip or any container with
a liquid, such as a vase or a flowerpot, on the Switch. Liquid or metallic objects falling into
the Switch could result in fire or electric shock.
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.
• Each Switch has at most 3.5 mA of leakage current. When the Switch is connected to an
AC power supply unit, always use a grounded power outlet. Using the Switch without