v
• Do not turn the main circuit power (circuit breaker) ON or OFF in order to start or stop inverter operation.
Doing so could cause failure.
• Do not touch the heat sink because they become very hot.
Doing so could cause burns.
• Setting the inverter to high speeds is easy. Before changing the frequency (speed) setting, check the
specifications of the motor and machinery.
• The brake function of the inverter does not provide mechanical holding means.
Injuries could occur.
Setting control switches
• Before setting up any internal control switches, turn OFF the power and wait more than five minutes for
models of 30HP for 208V, 40HP for 460V or below, or ten minutes for models of 40HP for 208V, 50HP
for 460V or above. Make sure that the LED monitor and charging lamp (on models of 40HP for 208V,
50HP for 460V or above) are turned OFF. Further, make sure, using a multimeter or a similar
instrument, that the DC link bus voltage between the terminals P (+) and N (-) has dropped below the
safe voltage (+25 VDC).
Otherwise electric shock could occur.
Maintenance and inspection, and parts replacement
• Turn the power OFF and wait for at least five minutes for models of 30HP for 208V, 40HP for 460V or
below, or ten minutes for models of 40HP for 208V, 50HP for 460V or above, before starting inspection.
Further, check that the LED monitor and charging lamp (on models of 40HP for 208V, 50HP for 460V or
above) are unlit and that the DC link bus voltage between the P (+) and N (-) terminals is lower than 25
VDC.
Otherwise, electric shock could occur.
• Maintenance, inspection, and parts replacement should be made only by qualified persons.
• Take off the watch, rings and other metallic objects before starting work.
• Use insulated tools.
Otherwise, electric shock or injuries could occur.
Disposal
• Treat the inverter as an industrial waste when disposing of it.
Otherwise injuries could occur.
Others
• Never attempt to modify the inverter.
Doing so could cause electric shock or injuries.
GENERAL PRECAUTIONS
Drawings in this manual may be illustrated without covers or safety shields for explanation of detail parts.
Restore the covers and shields in the original state and observe the description in the manual before
starting operation.
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