The Stop key on the keypad is valid only when the appropriate function setting has been
made. Prepare an emergency stop switch separately.
If an alarm reset is made with the reference signal present, a sudden start will occur.
Check that the reference signal is turned off in advance. Otherwise an accident could
occur.
Do not modify or alter anything inside the inverter.
Motor might not be protected by electronic thermal function of inverter.
Do not use a magnetic contactor on the inverter input for frequent starting/stopping of the
inverter.
Use a noise filter to reduce the effect of electromagnetic interference. Otherwise nearby
electronic equipment may be affected.
In case of input voltage unbalance, install AC reactor. Power Factor capacitors and
generators may become overheated and damaged due to potential high frequency noise
transmitted from inverter.
Use an insulation-rectified motor or take measures to suppress the micro surge voltage
when driving 400V 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.
Inverter can easily be set to high-speed operations, Verify capability of motor or machinery
prior to operating unit.
Stopping torque is not produced when using the DC-Break function. Install separate
equipment when stopping torque is needed.
(5) Fault prevention precautions
Provide a safety backup such as an emergency brake which will prevent the machine and
equipment from hazardous conditions if the inverter fails.
(6) Maintenance, inspection and parts replacement
Do not conduct a megger (insulation resistance) test on the control circuit of the inverter.
Refer to Chapter 6 for periodic inspection (parts replacement).
(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
circuit breaker, a cover or partially open. Never run the inverter like this. Always place the
cover with circuit breakers and follow this instruction manual when operating the inverter.
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