Precautions For Unit Installation; Precautions For Electrical Wiring - Mitsubishi Electric EW-50A Installation And Instruction Manual

To reduce the risk of fire or explosion, do not place flammable materials or use flammable
sprays around the controller.
To reduce the risk of electric shock or malfunction, do not touch the switches or buttons
with a sharp object.
To reduce the risk of injury, electric shock, or malfunction, avoid contact with the sharp
edges of certain parts.
To reduce the risk of injury, wear protective gear when working on the controller.
Wear protective gear when working on the controller. High-voltage parts pose a risk of
electric shock, and high-temperature parts pose a risk of burns.

1-2. Precautions for unit installation

Do not install the controller where there is a risk of flammable gas leaks. If flammable gas
accumulates around the controller, it may ignite and cause a fire or explosion.
Properly dispose of the packing materials. Plastic bags pose a suffocation hazard to
children.
Take appropriate safety measures against earthquakes to prevent the controller from
causing injury.
To prevent injury, install the controller on a flat surface strong enough to support its
weight.
To reduce the risk of short circuits, current leakage, electric shock, malfunction, smoke, or
fire, do not install the controller in a place exposed to water or in a condensing
environment.
The controller must be installed by qualified personnel according to the instructions
detailed in this manual. Improper installation may result in electric shock or fire.

1-3. Precautions for electrical wiring

To reduce the risk of malfunction, smoke, fire, or damage to the controller, do not connect
the power cable to the signal terminal block.
To reduce the risk of malfunction, smoke, fire, or damage to the controller, do not apply a
power supply voltage in excess of that specified.
Properly secure the cables in place and provide adequate slack in the cables so as not to
stress the terminals. Improperly connected cables may break, overheat, and cause smoke
or fire.
To reduce the risk of injury or electric shock, switch off the main power before performing
electrical work.
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