iv
(3) Trial run
Check all parameters during operation. Parameter values might require adjustment
depending on the application.
Always apply voltage within the permissible range of each terminal as indicated in this
manual. Otherwise, inverter damage may result.
(4) Operation precautions
When the Auto restart function is selected, the inverter will restart after a fault has occurred.
The Stop key on the keypad can only be used to stop the inverter when keypad control is
enabled. Install a separate emergency stop switch if necessary.
If a fault reset is made with the run command and /or reference signal present, a sudden
start will occur. Check that the run command and /or reference signal is turned off in
advance of resetting any faults. Otherwise an accident could occur.
Do not modify the inverter.
Depending on the motor specifications and user ETH overload settings, the motor may not
be protected by electronic thermal function of inverter.
The operation of the inverter is intended to be controlled by either keypad command or
control input signals. Do not use a magnetic contactor or any other device that routinely
disconnects the inverter and reconnects the inverter to the input supply power for the
purpose of starting and stopping the motor.
A noise filter may be installed to reduce the effect of electromagnetic interference.
Otherwise nearby electronic equipment may be affected.
In cases with input voltage unbalances, install an AC input reactor.
Power Factor capacitors and generators may become overheated and damaged due to
harmonics created by the inverter.
Use an insulation-rectified motor or take measures to suppress the micro surge voltage
when driving 460V class motor with inverter. A micro surge voltage attributable to wiring
constant is generated at motor terminals, and may deteriorate insulation and damage
motor.
Before operating unit and prior to user programming, reset user parameters to default
settings.
The Inverter can be set to operate a motor at high-speeds. Verify the speed capability of
motor and machinery prior to operating inverter.
Holding torque is not produced when using the DC-Brake function. Install separate
equipment when holding torque is required.
(5) Fault prevention precautions
If required, provide a safety backup such as an emergency mechanical brake to prevent
any hazardous conditions if the inverter fails during operation.
(6) Maintenance, inspection and parts replacement
Do not megger (hi-pot or insulation resistance) test the power or control circuit of the
inverter.
Refer to Chapter 8 for periodic inspection and parts replacement details.
(7) Disposal
Handle the inverter as an industrial waste when disposing of it.
(8) General instructions
Many of the diagrams and drawings in this instruction manual show the inverter without a cover. Prior
to operating the unit, be sure to restore covers and circuit protection according to specifications.
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