Hitachi SJ300-037HFE Manual De Usuario

Hitachi

viii

Cautions for Operations and Monitoring

CAUTION: The heat sink fins will have a high temperature. Be careful not
to touch them. Otherwise, there is the danger of getting burned.

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CAUTION: The operation of the inverter can be easily changed from low
speed to high speed. Be sure check the capability and limitations of the
motor and machine before operating the inverter. Otherwise, it may cause
injury to personnel.

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CAUTION: If you operate a motor at a frequency higher than the inverter
standard default setting (50Hz/60Hz), be sure to check the motor and
machine specifications with the respective manufacturer. Only operate the
motor at elevated frequencies after getting their approval. Otherwise, there
is the danger of equipment damage.

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CAUTION: It is possible to damage the inverter or other devices if your
application exceeds the maximum current or voltage characteristics of a
connection point.

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CAUTION: Be careful not to turn PID Clear ON and reset the integrator
sum when the inverter is in Run Mode (output to motor is ON). Otherwise,
this could cause the motor to decelerate rapidly, resulting in a trip.

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CAUTION: When the motor runs at lower speeds, the cooling effect of the
motor’s internal fan decreases.

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CAUTION: If the inverter capacity is more than twice the capacity of the
motor in use, the inverter may not achieve its full performance specifica-
tions.

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CAUTION: You must use a carrier frequency of more than 2.1kHz. The
inverter cannot operate in vector control mode at less than 2.1 kHz carrier
frequency.

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Warnings and Cautions for Troubleshooting and Maintenance

WARNING: Wait at least five (5) minutes after turning OFF the input power
supply before performing maintenance or an inspection. Otherwise, there is
the danger of electric shock.

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WARNING: Make sure that only qualified personnel will perform mainte-
nance, inspection, and part replacement. Before starting to work, remove
any metallic objects from your person (wristwatch, bracelet, etc.). Be sure
to use tools with insulated handles. Otherwise, there is a danger of electric
shock and/or injury to personnel.

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WARNING: Never remove connectors by pulling on its wire leads (wires
for cooling fan and logic P.C. board). Otherwise, there is danger of fire due
to wire breakage and/or injury to personnel.

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CAUTION: Do not connect the megger to any control circuit terminals such
as intelligent I/O, analog terminals, etc. Doing so could cause damage to the
inverter.

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CAUTION: Never test the withstand voltage (HIPOT) on the inverter. The
inverter has a surge protector between the main circuit terminals above and
the chassis ground.

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