Hitachi SJ2002 Series, Instruction Manual

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vi
Powerup Test Caution Messages
CAUTION: Be sure not to connect an AC power supply to the output
terminals. Otherwise, there is the possibility of damage to the inverter
and the danger of injury and/or fire. ..... 2–21
CAUTION: Remarks for using ground fault interrupter breakers in the
main power supply: Adjustable 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 an inadvertent trip of ground fault interrupters. 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
ground fault interrupters with higher trigger current. • Other components
should be secured with separate ground fault interrupters. • Ground fault
interrupters in the power input wiring of an inverter are not an absolute
protection against electric shock. ..... 2–21
CAUTION: Be sure to install a fuse in each phase of the main power
supply to the inverter. Otherwise, there is the danger of fire. ..... 2–21
CAUTION: For motor leads, ground fault interrupter breakers and
electromagnetic contactors, be sure to size these components properly
(each must have the capacity for rated current and voltage). Otherwise,
there is the danger of fire. ..... 2–21
CAUTION: The heat sink fins will have a high temperature. Be careful
not to touch them. Otherwise, there is the danger of getting burned. ..... 2–24
CAUTION: The operation of the inverter can be easily changed from low
speed to high speed. Be sure to check the capability and limitations of the
motor and machine before operating the inverter. Otherwise, there is the
danger of injury. ..... 2–24
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 and/or injury. .... 2–24 ,
..... 2–30
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
rotation correct? • Did the inverter trip during acceleration or decelera-
tion? • Were the rpm and frequency meter readings as expected? • Were
there any abnormal motor vibrations or noise? ..... 2–24