Maintenance, Inspection And Part Replacement - Hitachi J300 Series Instruction Manual

Radiating fin and discharging resistor will have high temperature.
*
Be sure not to touch them.
Otherwise, there is a danger of getting burned.
Low to high speed operation of the inverter can be easily set. Be sure
*
to operate it after checking the tolerance of the motor and machine.
Otherwise, there is a danger of injury.
If a motor is operated at a frequency higher than 60Hz, be sure to check
*
the speeds of the motor and the machine with each manufacturer, and
after getting their consent, operate them.
Otherwise, there is a danger of machine breakage.
Check the following before and during the test run.
*
Otherwise, there is a danger of machine breakage.
• Was the short-cut bar between +1 and + connected?
• Was the direction of the motor correct?
• Was the inverter tripped during acceleration or deceleration?
• Were the rpm and frequency meter correct?
• Were there any abnormal motor vibrations or noise?
• When overcurrent tripping or overvoltage tripping occurs during the
test run, increase the acceleration time or deceleration time.
4.

Maintenance, inspection and part replacement

Be sure to turn off the power supply during maintenance and
*
inspection.
After the power supply has been turned off, you must always wait 10
*
minutes so that DC bus capacitors can discharge then start maintenance
and inspection after the CHARGE lamp on the printed-circuit board has
gone out. (Immediately after the lamp has gone out, there will be a
residual voltage of about 50 V DC in the DC bus intermediate circuit.)
Perform the work after the CHARGE lamp has stopped flickering.
Make sure that only qualified persons will perform maintenance,
*
inspection and part replacement. (Before starting the work, remove
metallic objects from your person (wristwatch, bracelet, etc.)
(Be sure to use tools protected with insulation.)
Otherwise, there is a danger of electric shock and/or injury.
CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net
CAUTION
WARNING
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