Hitachi SJ300 Series Cautions for Operations and Monitoring, Warnings and Cautions for Troubleshooting and Maintenance

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Cautions for Operations and Monitoring

CAUTION: The heat sink fins will have a high temperature. Be careful not	............... 4–2
to touch them. Otherwise, there is the danger of getting burned.
CAUTION: The operation of the inverter can be easily changed from low	............... 4–2
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.
CAUTION: If you operate a motor at a frequency higher than the inverter	............... 4–2
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.
CAUTION: It is possible to damage the inverter or other devices if your	............... 4–7
application exceeds the maximum current or voltage characteristics of a
connection point.
CAUTION: Be careful not to turn PID Clear ON and reset the integrator	............. 4–30
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.
CAUTION: When the motor runs at lower speeds, the cooling effect of the	............. 4–55
motor’s internal fan decreases.
CAUTION: If the inverter capacity is more than twice the capacity of the	............. 4–70
motor in use, the inverter may not achieve its full performance specifica-
tions.

Warnings and Cautions for Troubleshooting and Maintenance

WARNING: Wait at least five (5) minutes after turning OFF the input power	............... 6–2
supply before performing maintenance or an inspection. Otherwise, there is
the danger of electric shock.
WARNING: Make sure that only qualified personnel will perform mainte-	............... 6–2
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.
WARNING: Never remove connectors by pulling on its wire leads (wires	............... 6–2
for cooling fan and logic P.C. board). Otherwise, there is danger of fire due
to wire breakage and/or injury to personnel.
CAUTION: Do not connect the megger to any control circuit terminals such	............. 6–11
as intelligent I/O, analog terminals, etc. Doing so could cause damage to the
inverter.
CAUTION: Never test the withstand voltage (HIPOT) on the inverter. The	............. 6–11
inverter has a surge protector between the main circuit terminals above and
the chassis ground.