Mitsubishi Electric 800 Series Instruction Manual page 8

CAUTION
Usage
 When installing the MC on the output side of the inverter, turn it ON/OFF while both the inverter and motor are at a stop.
 The electronic thermal O/L relay function may not be enough for protection of a motor from overheating. It is
recommended to install an external thermal relay for overheat protection.
 Do not repeatedly start or stop this product with a magnetic contactor on its input side. Doing so may shorten the life of
this product.
 Use a noise filter or other means to minimize electromagnetic interference with other electronic equipment used nearby
this product.
 Appropriate precautions must be taken to suppress harmonics. Otherwise harmonics in power systems generated from
this product may heat/damage a power factor correction capacitor or a generator.
 To drive a 600 V class motor with this product, use an insulation-enhanced motor, or take measures to suppress surge
voltage. Otherwise surge voltage, which is attributed to the length and thickness of wire, may occur at the motor
terminals, causing the motor insulation to deteriorate.
 When a motor is driven by the inverter, axial voltage is generated on the motor shaft, which may cause electrical
corrosion of the bearing. Take measures such as decreasing the carrier frequency.
 As all parameters return to their initial values after the Parameter clear or All parameter clear is performed, the needed
parameters for this product operation must be set again before the operation is started.
 This product can be easily set for high-speed operation. Therefore, consider all things related to the operation such as
the performance of a motor and equipment in a system before the setting change.
 This product's brake function cannot be used as a mechanical brake. Use a separate device instead.
 When performing an inverter operation with frequent starts/stops, rise/fall in the temperature of the transistor element of
the inverter will repeat due to a repeated flow of large current, shortening the life.
 Perform an inspection and test operation of this product if it has been stored for a long period of time.
 To avoid damage to this product due to static electricity, static electricity in your body must be discharged before you
touch this product.
 Only one PM motor can be connected to a single unit of this product.
 A PM motor must be used under PM sensorless vector control. Do not use a synchronous motor, induction motor, or
synchronous induction motor.
 Do not connect a PM motor to this product with it set to the induction motor control setting (initial setting). Do not connect
an induction motor to this product with it set to the PM sensorless vector control setting. Doing so will cause failure.
 As a process of starting a PM motor, turn ON the power of this product first, and then close the contactor on the output
side of this product.
 To maintain the security (confidentiality, integrity, and availability) of the inverter and the system against unauthorized
*1
access, DoS
attacks, computer viruses, and other cyberattacks from external devices via network, take appropriate
measures such as firewalls, virtual private networks (VPNs), and antivirus solutions. We shall have no responsibility or
liability for any problems involving inverter trouble and system trouble by DoS attacks, unauthorized access, computer
viruses, and other cyberattacks.
 Depending on the network environment, the inverter may not operate as intended due to delays or disconnection in
communication. Carefully consider what type of environment the inverter will be used in and any safety issues related to
its use.
*1 DoS: A denial-of-service (DoS) attack disrupts services by overloading systems or exploiting vulnerabilities, resulting in a denial-of-service (DoS)
state.
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