Hitachi SJ300-037HFE User Manual

Hitachi

SJ300 Inverter

vii

Warnings for Operations and Monitoring

WARNING: Be sure to turn ON the input power supply only after closing
the front case. While the inverter is energized, be sure not to open the front
case. Otherwise, there is the danger of electric shock.

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WARNING: Be sure not to operate electrical equipment with wet hands.
Otherwise, there is the danger of electric shock.

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WARNING: While the inverter is energized, be sure not to touch the
inverter terminals even when the motor is stopped. Otherwise, there is the
danger of electric shock.

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WARNING: If the Retry Mode is selected, the motor may suddenly restart
after a trip stop. Be sure to stop the inverter before approaching the machine
(be sure to design the machine so that safety for personnel is secure even if
it restarts.) Otherwise, it may cause injury to personnel.

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WARNING: If the power supply is cut OFF for a short period of time, the
inverter may restart operation after the power supply recovers if the Run
command is active. If a restart may pose danger to personnel, so be sure to
use a lock-out circuit so that it will not restart after power recovery. Other-
wise, it may cause injury to personnel.

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WARNING: The Stop Key is effective only when the Stop function is
enabled. Be sure to enable the Stop Key separately from the emergency
stop. Otherwise, it may cause injury to personnel.

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WARNING: During a trip event, if the alarm reset is applied and the Run
command is present, the inverter will automatically restart. Be sure to apply
the alarm reset only after verifying the Run command is OFF. Otherwise, it
may cause injury to personnel.

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WARNING: Be sure not to touch the inside of the energized inverter or to
put any conductive object into it. Otherwise, there is a danger of electric
shock and/or fire.

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WARNING: If power is turned ON when the Run command is already
active, the motor will automatically start and injury may result. Before
turning ON the power, confirm that the RUN command is not present.

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WARNING: When the Stop key function is disabled, pressing the Stop key
does not stop the inverter, nor will it reset a trip alarm.

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WARNING: Be sure to provide a separate, hard-wired emergency stop
switch when the application warrants it.

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WARNING: If the power is turned ON and the Run command is already
active, the motor starts rotation and is dangerous! Before turning power ON,
confirm that the external Run command is not active.

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WARNING: After the Reset command is given and the alarm reset occurs,
the motor will restart suddenly if the Run command is already active. Be
sure to set the alarm reset after verifying that the Run command is OFF to
prevent injury to personnel.

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WARNING: You may need to disconnect the load from the motor before
performing auto-tuning. The inverter runs the motor forward and backward
for several seconds without regard to load movement limits.

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