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

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Radiating fin and discharging resistor will have high temperature.
Be sure not to touch them.
Otherwise, there is a danger ofgetting bumed.
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a Low to high speed opcration of the inverter can be easily set. Be surc
to operate it after checking the tolerance ofthe motor and machine.
Otherwise. there is a danger oI injury.
a If a motor is operated at a frequency higher than 60H2, be sure to
check the speeds ofthe motor and the machine with each
manufacturer, and after getting their consent, operate them.
Otherwise, there is a danger of machine breakage.
o Check the following before iuld during the test run.
Otherwise, there is a danger ofmachine breakage.
. Was the shon-cut bar between +l and + connected?
Was the direction ofthe motor correct?
Was the invener ripped during acceleration or deceleration?
Were the rpm and frequency meter correct?
Were there any abnormal motor vibrations or noise?
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Maintenance, inspection and part replacement
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After a lapsc of morc than 10 minutes after turning off the input power
.uppl). pcdorm rhc meinlenance
and inspection.
Otherwise. there is a daneer ofelectric shock.
o Make sure that only qualified persons will pedorm maintenance,
inspection and pan replacement. (Befbre starting the work, remove
metallic objects f|om your person (wristwalch, br.rcelet, etc.)
(Be sure to use tools protected with insulation.)
Otherwise. there is a danger of electric shock and/or injury.
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a When removing connecto$, never puli the wircs. (Wircs for cooling ............ p. l0-l
fan and thermal relay)
Otherwise, there is a danger of tire due to wire breakage and/or injury.
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