Hitachi WJ Series User Manual page 26

Chapter 1
Injury
Prohibited
DO
Injury
Damage
DO
● Risk of burn injury!
Burn injury
Prohibited
● Risk of injury!
 If the retry mode has been selected, the inverter will restart suddenly after a
break upon detection of an error. Stay away from the machine controlled by
the inverter when the inverter is under such circumstances. (Design the
machine so that human safety can be ensured, even when the inverter restarts
suddenly.)
 The STOP/RESET key on the keypad can be enabled/disabled using the
"STOP/RESET-key enable [b087]". Prepare an emergency stop switch
separately.
 If a RUN command has been input to the inverter before a short-term power
failure, the inverter may restart operation after the power recovery. If such a
restart may put persons in danger, design a system configuration that disables
the inverter from restarting after power recovery.
 If a RUN command has been input to the inverter before the inverter enters
alarm status, the inverter will restart suddenly when the alarm status is reset
(by terminal, key operation or communication). Before resetting the alarm
status, make sure that no RUN command has been input.
 When an unexpected event occurs, do not touch the inverter or cable.
 Thoroughly understand and check the functions set in the inverter, and use it
only after confirming safety. Be careful that RUN command or resetting
operation do not cause an unexpected restart.
 When an error (alarm) occurs, before moving to the next operation (resetting
the alarm status or reapplying the power), make sure that no RUN command
has been input. If the inverter has received a RUN command, it restarts
automatically.
● Risk of injury and damage to machine!
 The inverter allows you to easily control the speed of the motor or machine
operations. Before operating the inverter, confirm the capacity and ratings of
the motor or machine controlled by the inverter.
 When using the inverter to operate a motor at a high frequency, check the
allowable motor speeds with the manufacturers of the motor and the machine
to be driven and obtain their consent before starting inverter operation.
 During inverter operation, check the motor for the direction of rotation,
abnormal sound, and vibrations.
 Do not touch the heat sink, which heats up during the inverter operation.
WARNING
1-2-6
Safety Instructions/Risks