V
¨ 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 8 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.
Morek IT OÜ, Rauna 24, 76506 Saue Harjumaa, Estonia. www.morek.eu Tel. +372 604 1423 Fax +372 604 1447 morek@morek.eu
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