Powerup Test Caution Messages - Hitachi SJ100 Series Quick Start Manual

CAUTION: Fasten the screws with the specified fastening torque
(see the following table). Check for any loosening of screws. Other-
wise, there is the danger of fire.
CAUTION: Remarks for using earth leakage circuit breakers in the
mains supply: Frequency inverters with CE-filters (RFI-filter) and
shielded (screened) motor cables have a higher leakage current
toward Earth GND. Especially at the moment of switching on this
can cause inadvertent tripping of earth leakage circuit breakers.
Because of the rectifier on the input side of the inverter there is the
possibility to stall the switch-off function through small amounts of
DC current. Please observe the following: • Use only short time-
invariant and pulse current-sensitive earth leakage circuit breakers
with higher trigger current. • Other components should be secured
with separate earth leakage circuit breakers. • Earth leakage circuit
breakers in the power input wiring of an inverter are not an absolute
protection against electric shock by direct touching.
CAUTION: Be sure to install a fuse in the wire for each phase of
the main power supply to the inverter. Otherwise, there is the
danger of fire.
CAUTION: For motor leads, earth leakage breakers and electro-
magnetic contactors, be sure to size these components properly
(each must have the capacity for rated current and voltage). Other-
wise, there is the danger of fire.

Powerup Test Caution Messages

CAUTION: The heat sink fins will have a high temperature. Be
careful not to touch them. Otherwise, there is the danger of getting
burned.
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, there is the danger of injury.
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.
CAUTION: Check the following before and during the powerup
test. Otherwise, there is the danger of equipment damage. • Is the
shorting bar between the +1 and + terminals installed? DO NOT
power or operate the inverter if the jumper is removed. • Is the
direction of the motor correct? • Did the inverter trip during acceler-
ation or deceleration? • Were the rpm and frequency meter readings
as expected? • Were there any abnormal motor vibrations or noise?
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SJ100 Inverter
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