6. ELECTRIC COMPONENTS AND SOFTWARE
HE-800A
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6. ELECTRIC COMPONENTS AND SOFTWARE
DANGER
Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the
wall outlet before opening the face plate of the control box. Touching areas where high voltages are
present can result in severe injury.
6-1. Precautions at the time of adjustment
Pay attention to the following when opening the control box for maintenance.
Electric shock
Some large capacitors may have a high voltage remaining in them for up to 5 minutes after the power is turned
off. To prevent electric shock, wait at least 5 minutes after the power is turned off before doing the following:
• Opening and closing the control box
• Replacing fuses
• Separating and joining connectors
• Measuring resistance
• Doing anything with a possibility of touching something inside the control box
Some adjustments require measuring the voltage while the power is turned on with the control box kept open.
In such a case, be careful not to touch any place other than that for the measurement. In addition, always keep
in mind that a high voltage remains for about 5 minutes after power is turned off.
Injury
While the power is turned on, the cooling fan of the control box operates; be careful not to get caught in it.
When separating or rejoining connectors, and measuring something, be careful not to cut your fingers on metal
parts such as heat sinks and covers.
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