Mitsubishi Electric 800 Series Instruction Manual page 3

WARNING
Usage
 Everyone must stay away from the equipment when the retry function is
set as it will restart suddenly after a trip.
 Since pressing the STOP/RESET 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 fault with the start signal ON restarts the
motor suddenly.
 Do not use a PM motor for an application where the PM motor is driven by
its load and runs at a speed higher than the maximum motor speed.
 Use this inverter only with three-phase induction motors or with a PM
motor. Connection of any other electrical equipment to the inverter output
may damage the equipment.
 Performing pre-excitation (LX signal and X13 signal) under torque control
(Real sensorless vector control) may start the motor running at a low
speed even when the start command (STF or STR) is not input. The
motor may run also at a low speed when the speed limit value = 0 with a
start command input. It must be confirmed that the motor running will not
cause any safety problem before performing pre-excitation.
 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 product.
CAUTION
Usage
 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. Doing so may shorten the life of this product.
 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 600 V 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 their initial values.
 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 held 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.
 Static electricity in your body must be discharged before you touch the
product.
 Only one PM motor can be connected to an inverter.
 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 in the induction motor control settings (initial
settings). Do not use an induction motor in the PM sensorless vector
control settings. It will cause a failure.
 In the system with a PM motor, the inverter power must be turned ON
before closing the contacts of the contactor at the output side.
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 the inverter or an external device controlling the inverter.
 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 a protective function is activated, take an appropriate corrective
action, then reset the inverter, and resume the operation.
Maintenance, inspection and parts replacement
 Do not carry out a megger (insulation resistance) test on the control circuit
of the inverter. It will cause a failure.
Disposal
 The inverter must be treated as industrial waste.
Application of caution labels
Caution labels are used to ensure safety during use of Mitsubishi Electric
inverters.
Apply the following labels to the inverter if the "retry function" and/or
"automatic restart after instantaneous power failure" have been enabled.
 For the retry function
 For automatic restart after instantaneous power failure
Application of motor control labels
Apply the following labels to the inverter to avoid connecting motors not
intended for a particular motor control setting.
General instruction
 For clarity, illustrations in this Instruction Manual may be drawn with
covers or safety guards removed. Ensure all covers and safety guards are
properly installed prior to starting operation. For details on the PM motor,
refer to the Instruction Manual of the PM motor.
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