Mitsubishi Electric 800 Series Hardware Instruction Manual page 9

CAUTION
Usage
 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 or a PTC thermistor 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 400V 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.
 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.
 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.
Emergency stop
 A safety backup such as an emergency brake must be provided for devices or equipment in a system to prevent
hazardous conditions in case of failure of this product or an external device controlling this product.
 If the breaker installed on the input side of this product trips, check for wiring faults (such as short circuits) and damage
to internal parts of this product, etc. Identify and remove the cause of the trip before resetting the tripped breaker (or
before applying the power to this product again).
 When any protective function is activated, take an appropriate corrective action before resetting this product to resume
the operation.
Maintenance, inspection and parts replacement
 Do not carry out a megger (insulation resistance) test on the control circuit of this product. Doing so will cause failure.
Disposal
 This product must be treated as industrial waste.
8