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CAUTION
(2) Wiring
Do not install a power factor correction capacitor, surge
suppressor or capacitor type filter on the inverter output side.
These devices on the inverter output side may be overheated
or burn out.
The connection orientation of the output cables U, V, W to the
motor affects the rotation direction of the motor.
(3) Test operation and adjustment
CAUTION
Before starting operation, each parameter must be confirmed
and adjusted. A failure to do so may cause some machines to
make unexpected motions.
WARNING
(4) Operation
Any person must stay away from the equipment when the retry
function is set as it will restart suddenly after trip.
Since pressing
key may not stop output depending on
the function setting status, separate circuit and switch that
make an emergency stop (power OFF, mechanical brake
operation for emergency stop, etc.) must be provided.
OFF status of the start signal must be confirmed before
resetting the inverter fault. Resetting inverter alarm with the
start signal ON restarts the motor suddenly.
The inverter must be used for three-phase induction motors.
Connection of any other electrical equipment to the inverter
output may damage the equipment.
Do not modify the equipment.
Do not perform parts removal which is not instructed in this
manual. Doing so may lead to fault or damage of the inverter.
CAUTION
The electronic thermal relay function does not guarantee
protection of the motor from overheating. It is recommended to
install both an external thermal and PTC thermistor for
overheat protection.
Do not use a magnetic contactor on the inverter input for
frequent starting/stopping of the inverter. Otherwise the life of
the inverter decreases.
The effect of electromagnetic interference must be reduced by
using a noise filter or by other means. Otherwise nearby
electronic equipment may be affected.
Appropriate measures must be taken to suppress harmonics.
Otherwise power supply harmonics from the inverter may heat/
damage the power factor correction capacitor and generator.
When driving a 400V class motor by the inverter, the motor
must be an insulation-enhanced motor or measures must be
taken to suppress surge voltage. Surge voltage attributable to
the wiring constants may occur at the motor terminals,
deteriorating the insulation of the motor.
When parameter clear or all parameter clear is performed, the
required parameters must be set again before starting
operations because all parameters return to the initial value.
The inverter can be easily set for high-speed operation. Before
changing its setting, the performances of the motor and
machine must be fully examined.
Stop status cannot be hold by the inverter's brake function. In
addition to the inverter's brake function, a holding device must
be installed to ensure safety.
Before running an inverter which had been stored for a long
period, inspection and test operation must be performed.
For prevention of damage due to static electricity, nearby metal
must be touched before touching this product to eliminate
static electricity from your body.
A-2
CAUTION
(5) Emergency stop
A safety backup such as an emergency brake must be
provided to prevent hazardous condition to the machine and
equipment in case of inverter failure.
When the breaker on the inverter input side trips, the wiring
must be checked for fault (short circuit), and internal parts of
the inverter for a damage, etc. The cause of the trip must be
identified and removed before turning ON the power of the
breaker.
When any protective function is activated, appropriate
corrective action must be taken, and the inverter must be reset
before resuming operation.
(6) Maintenance, inspection and parts replacement
CAUTION
Do not carry out a megger (insulation resistance) test on the
control circuit of the inverter. It will cause a failure.
(7) Disposing of the inverter
CAUTION
The inverter must be treated as industrial waste.
General instructions
Many of the diagrams and drawings in this Instruction Manual
show the inverter without a cover or partially open for
explanation. Never operate the inverter in this manner. The
cover must be always reinstalled and the instruction in this
Instruction Manual must be followed when operating the inverter.

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